128 files changed, 598 insertions, 606 deletions
diff --git a/firmware/target/arm/as3525/backlight-e200v2-fuze.c b/firmware/target/arm/as3525/backlight-e200v2-fuze.c
index 91e1ef4d0c..26602fcee6 100644
--- a/firmware/target/arm/as3525/backlight-e200v2-fuze.c
+++ b/firmware/target/arm/as3525/backlight-e200v2-fuze.c
@@ -28,12 +28,12 @@
 int buttonlight_is_on = 0;
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    ascodec_write(AS3514_DCDC15, brightness);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -45,7 +45,7 @@ void _backlight_on(void)
 #endif
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    ascodec_write(AS3514_DCDC15, 0x0);
 #ifdef HAVE_LCD_ENABLE
@@ -53,7 +53,7 @@ void _backlight_off(void)
 #endif
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    /* Needed for buttonlight and MicroSD to work at the same time */
    /* Turn ROD control on, as the OF does */
@@ -63,7 +63,7 @@ void _buttonlight_on(void)
    buttonlight_is_on = 1;
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    /* Needed for buttonlight and MicroSD to work at the same time */
    /* Turn ROD control off, as the OF does */
diff --git a/firmware/target/arm/as3525/sansa-c200v2/backlight-c200v2.c b/firmware/target/arm/as3525/sansa-c200v2/backlight-c200v2.c
index 1da57de93a..6344eff593 100644
--- a/firmware/target/arm/as3525/sansa-c200v2/backlight-c200v2.c
+++ b/firmware/target/arm/as3525/sansa-c200v2/backlight-c200v2.c
@@ -98,7 +98,7 @@ void _backlight_pwm(int on)
    }
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    GPIOA_DIR |= 1<<5;
    if (c200v2_variant == 1) {
@@ -109,14 +109,14 @@ bool _backlight_init(void)
    return true;
 }
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    backlight_level = brightness_table[brightness];
    if (brightness > 0)
-        _backlight_on();
+        backlight_hw_on();
    else
-        _backlight_off();
+        backlight_hw_off();
 }
 static void _pwm_on(void)
@@ -130,7 +130,7 @@ static void _pwm_off(void)
        _set_timer2_pwm_ratio(0);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    if (backlight_is_on == 1) {
        /* Update pwm ratio in case user changed the brightness */
@@ -146,7 +146,7 @@ void _backlight_on(void)
    backlight_is_on = 1;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    if (backlight_is_on == 0)
        return;
@@ -159,7 +159,7 @@ void _backlight_off(void)
 #endif
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    if (buttonlight_is_on == 1)
        return;
@@ -169,7 +169,7 @@ void _buttonlight_on(void)
    buttonlight_is_on = 1;
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    if (buttonlight_is_on == 0)
        return;
diff --git a/firmware/target/arm/as3525/sansa-c200v2/backlight-target.h b/firmware/target/arm/as3525/sansa-c200v2/backlight-target.h
index 4a098f7f28..a6b07de6bf 100644
--- a/firmware/target/arm/as3525/sansa-c200v2/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-c200v2/backlight-target.h
@@ -23,22 +23,22 @@
 #include <stdbool.h>
-bool _backlight_init(void);
+bool backlight_hw_init(void);
 void _backlight_pwm(int on);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 static inline void _backlight_panic_on(void)
 {
-    _backlight_on();
+    backlight_hw_on();
    _backlight_pwm(1);
 }
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 int  __backlight_is_on(void);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 /*
 * FIXME: This may be better off in kernel.h, but...
diff --git a/firmware/target/arm/as3525/sansa-clip/backlight-target.h b/firmware/target/arm/as3525/sansa-clip/backlight-target.h
index 00c6e5cc44..669f0f5939 100644
--- a/firmware/target/arm/as3525/sansa-clip/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-clip/backlight-target.h
@@ -25,30 +25,30 @@
 #include "lcd.h"
 #include "backlight.h"
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    lcd_enable(true);
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    lcd_enable(false);
 }
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
-static inline bool _backlight_init(void)
+static inline bool backlight_hw_init(void)
 {
    GPIOD_DIR |= (1<<7); /* for button light */
    return true;
 }
-static inline void _buttonlight_on(void)
+static inline void buttonlight_hw_on(void)
 {
    GPIOD_PIN(7) = (1<<7);
 }
-static inline void _buttonlight_off(void)
+static inline void buttonlight_hw_off(void)
 {
    GPIOD_PIN(7) = 0;
 }
diff --git a/firmware/target/arm/as3525/sansa-clipplus/backlight-clip.c b/firmware/target/arm/as3525/sansa-clipplus/backlight-clip.c
index e3b518b3f8..76df12c948 100644
--- a/firmware/target/arm/as3525/sansa-clipplus/backlight-clip.c
+++ b/firmware/target/arm/as3525/sansa-clipplus/backlight-clip.c
@@ -24,13 +24,13 @@
 #include "as3525v2.h"
 #include "ascodec.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x90);
    lcd_enable(true);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    lcd_enable(false);
    ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x00);
diff --git a/firmware/target/arm/as3525/sansa-clipplus/backlight-target.h b/firmware/target/arm/as3525/sansa-clipplus/backlight-target.h
index 3dd9240bd8..9e8ff1ce8c 100644
--- a/firmware/target/arm/as3525/sansa-clipplus/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-clipplus/backlight-target.h
@@ -21,10 +21,10 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
 #endif
diff --git a/firmware/target/arm/as3525/sansa-clipv2/backlight-clipv2.c b/firmware/target/arm/as3525/sansa-clipv2/backlight-clipv2.c
index f4927ba5bf..65f69e8bcd 100644
--- a/firmware/target/arm/as3525/sansa-clipv2/backlight-clipv2.c
+++ b/firmware/target/arm/as3525/sansa-clipv2/backlight-clipv2.c
@@ -24,13 +24,13 @@
 #include "as3525v2.h"
 #include "ascodec.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x90);
    lcd_enable(true);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    lcd_enable(false);
    ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x0);
diff --git a/firmware/target/arm/as3525/sansa-clipv2/backlight-target.h b/firmware/target/arm/as3525/sansa-clipv2/backlight-target.h
index b2da63dbff..800b26d7fa 100644
--- a/firmware/target/arm/as3525/sansa-clipv2/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-clipv2/backlight-target.h
@@ -24,22 +24,22 @@
 #include <stdbool.h>
 #include "cpu.h"
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
-static inline bool _backlight_init(void)
+static inline bool backlight_hw_init(void)
 {
    GPIOA_DIR |= 1<<5; /* for button light */
    return true;
 }
-static inline void _buttonlight_on(void)
+static inline void buttonlight_hw_on(void)
 {
    GPIOA_PIN(5) = 1<<5;
 }
-static inline void _buttonlight_off(void)
+static inline void buttonlight_hw_off(void)
 {
    GPIOA_PIN(5) = 0;
 }
diff --git a/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c b/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c
index a47941bbd7..9fde68dd8a 100644
--- a/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c
+++ b/firmware/target/arm/as3525/sansa-clipzip/backlight-clipzip.c
@@ -27,12 +27,12 @@
 #include "ascodec.h"
 #include "lcd-target.h"
-bool _backlight_init()
+bool backlight_hw_init()
 {
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    /* GPIO B1 controls backlight */
    GPIOB_DIR |= (1 << 1);
@@ -43,7 +43,7 @@ void _backlight_on(void)
 #endif
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false);
@@ -52,7 +52,7 @@ void _backlight_off(void)
    GPIOB_PIN(1) = 0;
 }
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    oled_brightness(brightness);
 }
diff --git a/firmware/target/arm/as3525/sansa-clipzip/backlight-target.h b/firmware/target/arm/as3525/sansa-clipzip/backlight-target.h
index bf58973ab6..00b925c22b 100644
--- a/firmware/target/arm/as3525/sansa-clipzip/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-clipzip/backlight-target.h
@@ -21,11 +21,11 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
 #endif
diff --git a/firmware/target/arm/as3525/sansa-e200v2/backlight-target.h b/firmware/target/arm/as3525/sansa-e200v2/backlight-target.h
index 227a154197..0baaf2441a 100644
--- a/firmware/target/arm/as3525/sansa-e200v2/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-e200v2/backlight-target.h
@@ -21,13 +21,13 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 int  __backlight_is_on(void);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/as3525/sansa-fuze/backlight-target.h b/firmware/target/arm/as3525/sansa-fuze/backlight-target.h
index df6df573b0..c4e95e9c4a 100644
--- a/firmware/target/arm/as3525/sansa-fuze/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-fuze/backlight-target.h
@@ -21,13 +21,13 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #ifdef HAVE_BUTTON_LIGHT
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
 #endif
diff --git a/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c b/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c
index a01b168b71..71f0c1a3f2 100644
--- a/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c
+++ b/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c
@@ -26,12 +26,12 @@
 #include "ascodec.h"
 #include "as3514.h"
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    ascodec_write_pmu(AS3543_BACKLIGHT, 2, brightness * 10);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x80);
    ascodec_write_pmu(AS3543_BACKLIGHT, 2, backlight_brightness * 10);
@@ -49,7 +49,7 @@ bool _backlight_init(void)
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -57,7 +57,7 @@ void _backlight_on(void)
    ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x80);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    ascodec_write_pmu(AS3543_BACKLIGHT, 1, 0x0);
 #ifdef HAVE_LCD_ENABLE
@@ -65,7 +65,7 @@ void _backlight_off(void)
 #endif
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    if (amsv2_variant == 0)
    {
@@ -77,7 +77,7 @@ void _buttonlight_on(void)
    }
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    if (amsv2_variant == 0)
    {
diff --git a/firmware/target/arm/as3525/sansa-fuzev2/backlight-target.h b/firmware/target/arm/as3525/sansa-fuzev2/backlight-target.h
index f9d7005f79..4138ef7868 100644
--- a/firmware/target/arm/as3525/sansa-fuzev2/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-fuzev2/backlight-target.h
@@ -25,13 +25,13 @@
 #include "config.h"
 #include "ascodec.h"
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #ifdef HAVE_BUTTON_LIGHT
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
 #endif
diff --git a/firmware/target/arm/as3525/sansa-m200v4/backlight-target.h b/firmware/target/arm/as3525/sansa-m200v4/backlight-target.h
index b5560bd037..f3ef1095e6 100644
--- a/firmware/target/arm/as3525/sansa-m200v4/backlight-target.h
+++ b/firmware/target/arm/as3525/sansa-m200v4/backlight-target.h
@@ -21,22 +21,22 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-static inline bool _backlight_init(void)
+static inline bool backlight_hw_init(void)
 {
    GPIOD_DIR |= (1<<1);
    return true;
 }
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    GPIOD_PIN(1) = (1<<1);
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    GPIOD_PIN(1) = 0x00;
 }
-#define _backlight_panic_on() _backlight_on()
+#define _backlight_panic_on() backlight_hw_on()
 #endif
diff --git a/firmware/target/arm/as3525/sd-as3525.c b/firmware/target/arm/as3525/sd-as3525.c
index ead40eac3c..4530d5d763 100644
--- a/firmware/target/arm/as3525/sd-as3525.c
+++ b/firmware/target/arm/as3525/sd-as3525.c
@@ -969,7 +969,7 @@ void sd_enable(bool on)
        if (buttonlight_is_on)
            GPIOD_DIR &= ~(1<<7);
        else
-            _buttonlight_off();
+           buttonlight_hw_off();
 #endif
 #if defined(HAVE_HOTSWAP) && defined (HAVE_ADJUSTABLE_CPU_VOLTAGE)
@@ -993,7 +993,7 @@ void sd_enable(bool on)
 #if defined(HAVE_BUTTON_LIGHT) && defined(HAVE_MULTIDRIVE)
        bitmod32(&CCU_IO, 0<<2, 3<<2);  /* XPD is general purpose IO (b3:2 = 00) */
        if (buttonlight_is_on)
-            _buttonlight_on();
+           buttonlight_hw_on();
 #endif
    }
 }
diff --git a/firmware/target/arm/as3525/system-as3525.c b/firmware/target/arm/as3525/system-as3525.c
index f128ef68be..51b6755601 100644
--- a/firmware/target/arm/as3525/system-as3525.c
+++ b/firmware/target/arm/as3525/system-as3525.c
@@ -360,7 +360,7 @@ void system_init(void)
 void system_reboot(void)
 {
-    _backlight_off();
+    backlight_hw_off();
    disable_irq();
diff --git a/firmware/target/arm/at91sam/lyre_proto1/backlight-lyre_proto1.c b/firmware/target/arm/at91sam/lyre_proto1/backlight-lyre_proto1.c
index fabf8aa041..b60449417a 100644
--- a/firmware/target/arm/at91sam/lyre_proto1/backlight-lyre_proto1.c
+++ b/firmware/target/arm/at91sam/lyre_proto1/backlight-lyre_proto1.c
@@ -19,27 +19,27 @@
 *
 ****************************************************************************/
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    (void)brightness;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
 }
diff --git a/firmware/target/arm/imx233/creative-zen/backlight-target.h b/firmware/target/arm/imx233/creative-zen/backlight-target.h
index 78a0a72d85..60a2fbe746 100644
--- a/firmware/target/arm/imx233/creative-zen/backlight-target.h
+++ b/firmware/target/arm/imx233/creative-zen/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/arm/imx233/creative-zen/backlight-zen.c b/firmware/target/arm/imx233/creative-zen/backlight-zen.c
index 6d162817c8..ef2ab615a5 100644
--- a/firmware/target/arm/imx233/creative-zen/backlight-zen.c
+++ b/firmware/target/arm/imx233/creative-zen/backlight-zen.c
@@ -28,7 +28,7 @@
 #include "pinctrl-imx233.h"
 #include "pwm-imx233.h"
-void _backlight_set_brightness(int level)
+void backlight_hw_brightness(int level)
 {
 #if defined(CREATIVE_ZENXFISTYLE)
    imx233_pwm_setup_simple(4, 24000, level);
@@ -49,7 +49,7 @@ void _backlight_set_brightness(int level)
 #endif
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
 #if !defined(CREATIVE_ZENV) && !defined(CREATIVE_ZENXFISTYLE)
    imx233_pinctrl_acquire(1, 12, "backlight_enable");
@@ -60,19 +60,19 @@ bool _backlight_init(void)
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
 #endif
    /* restore the previous backlight level */
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* there is no real on/off but we can set to 0 brightness */
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
diff --git a/firmware/target/arm/imx233/creative-zenxfi2/backlight-target.h b/firmware/target/arm/imx233/creative-zenxfi2/backlight-target.h
index e3766965d8..483272f804 100644
--- a/firmware/target/arm/imx233/creative-zenxfi2/backlight-target.h
+++ b/firmware/target/arm/imx233/creative-zenxfi2/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/arm/imx233/creative-zenxfi2/backlight-zenxfi2.c b/firmware/target/arm/imx233/creative-zenxfi2/backlight-zenxfi2.c
index b01dc36063..02e7a0f77e 100644
--- a/firmware/target/arm/imx233/creative-zenxfi2/backlight-zenxfi2.c
+++ b/firmware/target/arm/imx233/creative-zenxfi2/backlight-zenxfi2.c
@@ -26,19 +26,19 @@
 #include "backlight-target.h"
 #include "pwm-imx233.h"
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    imx233_pwm_setup_simple(4, 24000, brightness);
    imx233_pwm_enable(4, true);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -46,10 +46,10 @@ void _backlight_on(void)
    /* don't do anything special, the core will set the brightness */
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* there is no real on/off but we can set to 0 brightness */
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
diff --git a/firmware/target/arm/imx233/creative-zenxfi3/backlight-target.h b/firmware/target/arm/imx233/creative-zenxfi3/backlight-target.h
index c7508c87a3..edc67ba816 100644
--- a/firmware/target/arm/imx233/creative-zenxfi3/backlight-target.h
+++ b/firmware/target/arm/imx233/creative-zenxfi3/backlight-target.h
@@ -21,13 +21,13 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
-void _buttonlight_set_brightness(int brightness);
+void buttonlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/arm/imx233/creative-zenxfi3/backlight-zenxfi3.c b/firmware/target/arm/imx233/creative-zenxfi3/backlight-zenxfi3.c
index 7013696642..2b77a4d7ac 100644
--- a/firmware/target/arm/imx233/creative-zenxfi3/backlight-zenxfi3.c
+++ b/firmware/target/arm/imx233/creative-zenxfi3/backlight-zenxfi3.c
@@ -27,19 +27,19 @@
 #include "pwm-imx233.h"
 #include "mpr121.h"
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    imx233_pwm_setup_simple(2, 24000, brightness);
    imx233_pwm_enable(2, true);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -47,29 +47,29 @@ void _backlight_on(void)
    /* don't do anything special, the core will set the brightness */
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* there is no real on/off but we can set to 0 brightness */
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
 }
 /* ELE8 is the button light GPIO */
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    /* assume mpr121 was initialized by button-zenxfi3.c */
    mpr121_set_gpio_output(8, ELE_GPIO_SET);
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    /* assume mpr121 was initialized by button-zenxfi3.c */
    mpr121_set_gpio_output(8, ELE_GPIO_CLR);
 }
-void _buttonlight_set_brightness(int brightness)
+void buttonlight_hw_brightness(int brightness)
 {
    /* assume mpr121 was initialized by button-zenxfi3.c */
    /* since backlight brightness is the same for the screen and the button light,
diff --git a/firmware/target/arm/imx233/samsung-ypz5/backlight-target.h b/firmware/target/arm/imx233/samsung-ypz5/backlight-target.h
index 5fa2ed38f9..e26f83811d 100644
--- a/firmware/target/arm/imx233/samsung-ypz5/backlight-target.h
+++ b/firmware/target/arm/imx233/samsung-ypz5/backlight-target.h
@@ -20,9 +20,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/arm/imx233/samsung-ypz5/backlight-ypz5.c b/firmware/target/arm/imx233/samsung-ypz5/backlight-ypz5.c
index 27a7ecedfc..b02c3a1d16 100644
--- a/firmware/target/arm/imx233/samsung-ypz5/backlight-ypz5.c
+++ b/firmware/target/arm/imx233/samsung-ypz5/backlight-ypz5.c
@@ -77,7 +77,7 @@ static void aat3151_write(int addr, int data)
    udelay(TIME_LAT);
 }
-void _backlight_set_brightness(int level)
+void backlight_hw_brightness(int level)
 {
    /* Don't try to reset backlight if not necessary
     *  Moreover this helps to avoid flickering when
@@ -120,7 +120,7 @@ void _backlight_set_brightness(int level)
    current_level = level;
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    imx233_pinctrl_acquire(3, 13, "backlight");
    imx233_pinctrl_set_function(3, 13, PINCTRL_FUNCTION_GPIO);
@@ -130,19 +130,19 @@ bool _backlight_init(void)
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
 #endif
    /* restore the previous backlight level */
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* there is no real on/off but we can set to 0 brightness */
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
diff --git a/firmware/target/arm/imx233/sansa-fuzeplus/backlight-fuzeplus.c b/firmware/target/arm/imx233/sansa-fuzeplus/backlight-fuzeplus.c
index 3ee9d0914a..f87dbddfc0 100644
--- a/firmware/target/arm/imx233/sansa-fuzeplus/backlight-fuzeplus.c
+++ b/firmware/target/arm/imx233/sansa-fuzeplus/backlight-fuzeplus.c
@@ -26,7 +26,7 @@
 #include "backlight-target.h"
 #include "pinctrl-imx233.h"
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    if(brightness != 0)
        brightness = MAX_BRIGHTNESS_SETTING + 1 - brightness;
@@ -39,17 +39,17 @@ void _backlight_set_brightness(int brightness)
    }
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    imx233_pinctrl_acquire(1, 28, "backlight");
    imx233_pinctrl_set_function(1, 28, PINCTRL_FUNCTION_GPIO);
    imx233_pinctrl_set_drive(1, 28, PINCTRL_DRIVE_8mA);
    imx233_pinctrl_enable_gpio(1, 28, true);
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -57,10 +57,10 @@ void _backlight_on(void)
    /* don't do anything special, the core will set the brightness */
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* there is no real on/off but we can set to 0 brightness */
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
diff --git a/firmware/target/arm/imx233/sansa-fuzeplus/backlight-target.h b/firmware/target/arm/imx233/sansa-fuzeplus/backlight-target.h
index e3766965d8..483272f804 100644
--- a/firmware/target/arm/imx233/sansa-fuzeplus/backlight-target.h
+++ b/firmware/target/arm/imx233/sansa-fuzeplus/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/arm/imx233/sony-nwz/backlight-nwz.c b/firmware/target/arm/imx233/sony-nwz/backlight-nwz.c
index d99d21386b..fecbeda15b 100644
--- a/firmware/target/arm/imx233/sony-nwz/backlight-nwz.c
+++ b/firmware/target/arm/imx233/sony-nwz/backlight-nwz.c
@@ -27,7 +27,7 @@
 #include "pwm-imx233.h"
 #include "pinctrl-imx233.h"
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    bool en = brightness > 0;
    imx233_pwm_setup_simple(2, 24000, 100 - brightness);
@@ -35,17 +35,17 @@ void _backlight_set_brightness(int brightness)
    imx233_pinctrl_set_gpio(0, 10, en);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    imx233_pinctrl_acquire(0, 10, "backlight_enable");
    imx233_pinctrl_set_function(0, 10, PINCTRL_FUNCTION_GPIO);
    imx233_pinctrl_enable_gpio(0, 10, true);
    imx233_pinctrl_set_gpio(0, 10, true);
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -53,10 +53,10 @@ void _backlight_on(void)
    /* don't do anything special, the core will set the brightness */
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* there is no real on/off but we can set to 0 brightness */
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
diff --git a/firmware/target/arm/imx233/sony-nwz/backlight-target.h b/firmware/target/arm/imx233/sony-nwz/backlight-target.h
index 78a0a72d85..60a2fbe746 100644
--- a/firmware/target/arm/imx233/sony-nwz/backlight-target.h
+++ b/firmware/target/arm/imx233/sony-nwz/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/arm/imx233/system-imx233.c b/firmware/target/arm/imx233/system-imx233.c
index f34eab66e2..38865c47a3 100644
--- a/firmware/target/arm/imx233/system-imx233.c
+++ b/firmware/target/arm/imx233/system-imx233.c
@@ -105,7 +105,7 @@ void imx233_chip_reset(void)
 void system_reboot(void)
 {
-    _backlight_off();
+    backlight_hw_off();
    disable_irq();
@@ -119,8 +119,8 @@ void system_exception_wait(void)
    imx233_rtc_enable_watchdog(false);
    /* make sure lcd and backlight are on */
    lcd_update();
-    _backlight_on();
+    backlight_hw_on();
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
    /* wait until button release (if a button is pressed) */
 #ifdef HAVE_BUTTON_DATA
    int data;
diff --git a/firmware/target/arm/imx31/gigabeat-s/backlight-gigabeat-s.c b/firmware/target/arm/imx31/gigabeat-s/backlight-gigabeat-s.c
index 60fcb4729d..29d8980d86 100644
--- a/firmware/target/arm/imx31/gigabeat-s/backlight-gigabeat-s.c
+++ b/firmware/target/arm/imx31/gigabeat-s/backlight-gigabeat-s.c
@@ -79,7 +79,7 @@ static uint32_t backlight_pwm_bits;     /* Final PWM setting for fade-in */
 /* Backlight ramping settings */
 static uint32_t led_ramp_mask = MC13783_LEDMDRAMPDOWN | MC13783_LEDMDRAMPUP;
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* Set default LED register value */
    mc13783_write(MC13783_LED_CONTROL0,
@@ -88,7 +88,7 @@ bool _backlight_init(void)
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
    /* Our PWM and I-Level is different than retailos (but same apparent
     * brightness), so init to our default. */
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
 #else
    /* Use default PWM */
    backlight_pwm_bits = mc13783_read(MC13783_LED_CONTROL2) & MC13783_LEDMDDC;
@@ -113,7 +113,7 @@ void backlight_set_fade_in(bool value)
        led_ramp_mask &= ~MC13783_LEDMDRAMPUP;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    static const char regs[2] =
    {
@@ -149,7 +149,7 @@ void _backlight_on(void)
    }
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    uint32_t ctrl0 = MC13783_LED_CONTROL0_BITS | MC13783_LEDEN;
@@ -173,7 +173,7 @@ void _backlight_off(void)
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
 /* Assumes that the backlight has been initialized - parameter should
 * already be range-checked in public interface. */
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    uint32_t md = led_md_pwm_table[brightness].md;
    backlight_pwm_bits = backlight_on_status ?
diff --git a/firmware/target/arm/imx31/gigabeat-s/backlight-target.h b/firmware/target/arm/imx31/gigabeat-s/backlight-target.h
index 2ae1372815..124fa87b17 100644
--- a/firmware/target/arm/imx31/gigabeat-s/backlight-target.h
+++ b/firmware/target/arm/imx31/gigabeat-s/backlight-target.h
@@ -27,10 +27,10 @@
 #define BACKLIGHT_FULL_INIT
 #endif
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 void _backlight_lcd_sleep(void);
diff --git a/firmware/target/arm/imx31/gigabeat-s/power-gigabeat-s.c b/firmware/target/arm/imx31/gigabeat-s/power-gigabeat-s.c
index d194a69ab1..5d89802bc9 100644
--- a/firmware/target/arm/imx31/gigabeat-s/power-gigabeat-s.c
+++ b/firmware/target/arm/imx31/gigabeat-s/power-gigabeat-s.c
@@ -136,7 +136,7 @@ void power_off(void)
    dptc_stop();
    /* Cut backlight */
-    _backlight_off();
+    backlight_hw_off();
    /* Let it fade */
    sleep(5*HZ/4);
diff --git a/firmware/target/arm/ipod/1g2g/backlight-1g2g.c b/firmware/target/arm/ipod/1g2g/backlight-1g2g.c
index b7797813ec..7f1fa7ba42 100644
--- a/firmware/target/arm/ipod/1g2g/backlight-1g2g.c
+++ b/firmware/target/arm/ipod/1g2g/backlight-1g2g.c
@@ -24,13 +24,13 @@
 #include "backlight.h"
 #include "backlight-target.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    LCD1_CONTROL |= 0x02;
    lcd_set_backlight_inversion(true);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    LCD1_CONTROL &= ~0x02;
    lcd_set_backlight_inversion(false);
diff --git a/firmware/target/arm/ipod/1g2g/backlight-target.h b/firmware/target/arm/ipod/1g2g/backlight-target.h
index 22826054aa..e888aa7c3f 100644
--- a/firmware/target/arm/ipod/1g2g/backlight-target.h
+++ b/firmware/target/arm/ipod/1g2g/backlight-target.h
@@ -21,8 +21,8 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() false
+#define backlight_hw_init() false
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/ipod/3g/backlight-3g.c b/firmware/target/arm/ipod/3g/backlight-3g.c
index 77088e32ec..fcc162310f 100644
--- a/firmware/target/arm/ipod/3g/backlight-3g.c
+++ b/firmware/target/arm/ipod/3g/backlight-3g.c
@@ -23,12 +23,12 @@
 #include "backlight.h"
 #include "backlight-target.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    LCD1_CONTROL |= 0x02;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    LCD1_CONTROL &= ~0x02;
 }
diff --git a/firmware/target/arm/ipod/backlight-4g_color.c b/firmware/target/arm/ipod/backlight-4g_color.c
index befb036eab..96ed387625 100644
--- a/firmware/target/arm/ipod/backlight-4g_color.c
+++ b/firmware/target/arm/ipod/backlight-4g_color.c
@@ -44,11 +44,11 @@ static unsigned char log_brightness[32] = {
 static unsigned brightness = 100;   /* 1 to 255 */
 static bool enabled = false;
-/* Handling B03 in _backlight_on() and _backlight_off() makes backlight go off
+/* Handling B03 in backlight_hw_on() and backlight_hw_off() makes backlight go off
 * without delay. Not doing that does a short (fixed) fade out. Opt for the
 * latter. */
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    /* brightness full */
    outl(0x80000000 | (brightness << 16), 0x7000a010);
@@ -56,27 +56,27 @@ void _backlight_on(void)
    enabled = true;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    outl(0x80000000, 0x7000a010);
    GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x08);
    enabled = false;
 }
-void _backlight_set_brightness(int val)
+void backlight_hw_brightness(int val)
 {
    brightness = log_brightness[val];
    if (enabled)
        outl(0x80000000 | (brightness << 16), 0x7000a010);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    GPIO_SET_BITWISE(GPIOB_ENABLE, 0x0c); /* B02 and B03 enable */
    GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x08); /* B03 = 1 */
    GPO32_ENABLE &= ~0x2000000; /* D01 disable, so pwm takes over */
    DEV_EN |= DEV_PWM;   /* PWM enable */
-    _backlight_on();
+    backlight_hw_on();
    return true;
 }
diff --git a/firmware/target/arm/ipod/backlight-nano_video.c b/firmware/target/arm/ipod/backlight-nano_video.c
index 2f56f94225..e2e9bf0341 100644
--- a/firmware/target/arm/ipod/backlight-nano_video.c
+++ b/firmware/target/arm/ipod/backlight-nano_video.c
@@ -38,7 +38,7 @@ static int brightness = 1;   /* 1 to 32 */
 static int current_dim = 16; /* default after enabling the backlight dimmer */
 static bool enabled = false;
-void _backlight_set_brightness(int val)
+void backlight_hw_brightness(int val)
 {
    int oldlevel;
@@ -91,7 +91,7 @@ void _backlight_hw_enable(bool on)
        GPIO_SET_BITWISE(GPIOD_OUTPUT_VAL, 0x80);
        sleep(HZ/100);
        current_dim = 16;
-        _backlight_set_brightness(brightness);
+        backlight_hw_brightness(brightness);
    }
    else
    {
@@ -116,7 +116,7 @@ void _backlight_led_off(void)
    GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 0x80);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    GPIO_SET_BITWISE(GPIOB_ENABLE, 0x08);
    GPIO_SET_BITWISE(GPIOB_OUTPUT_EN, 0x08);
diff --git a/firmware/target/arm/ipod/backlight-target.h b/firmware/target/arm/ipod/backlight-target.h
index 9b6a96b3cb..fef7ee8ce0 100644
--- a/firmware/target/arm/ipod/backlight-target.h
+++ b/firmware/target/arm/ipod/backlight-target.h
@@ -23,8 +23,8 @@
 #if defined(IPOD_VIDEO) || defined(IPOD_NANO)
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_set_brightness(int val);
+void backlight_hw_brightness(int val);
 void _backlight_led_on(void);
 void _backlight_led_off(void);
 void _backlight_hw_enable(bool on);
@@ -34,48 +34,48 @@ void lcd_awake(void);
 #endif
 #ifdef BOOTLOADER
-#define _backlight_on()  do { _backlight_hw_enable(true); \
+#define backlight_hw_on()  do { _backlight_hw_enable(true); \
                              _backlight_led_on(); } while(0)
-#define _backlight_off() do { _backlight_led_off(); \
+#define backlight_hw_off() do { _backlight_led_off(); \
                              _backlight_hw_enable(false); } while(0)
 #else /* !BOOTLOADER */
-#define _backlight_on_isr() _backlight_led_on()
+#define backlight_hw_on_isr() _backlight_led_on()
-#define _backlight_off_isr() _backlight_led_off()
+#define backlight_hw_off_isr() _backlight_led_off()
-#define _backlight_on_normal()  do { _backlight_hw_enable(true); \
+#define backlight_hw_on_normal()  do { _backlight_hw_enable(true); \
                                     _backlight_led_on(); } while(0)
-#define _backlight_off_normal() do { _backlight_led_off(); \
+#define backlight_hw_off_normal() do { _backlight_led_off(); \
                                     _backlight_hw_enable(false); } while(0)
 #define _BACKLIGHT_FADE_ENABLE
 #endif /* !BOOTLOADER */
 #elif defined(IPOD_4G) || defined(IPOD_COLOR)
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int val);
+void backlight_hw_brightness(int val);
 #elif defined(IPOD_MINI) || defined(IPOD_MINI2G)
-#define _backlight_init() true
+#define backlight_hw_init() true
 void _backlight_hw_on(void);
 void _backlight_hw_off(void);
 #ifdef BOOTLOADER
-#define _backlight_on() _backlight_hw_on()
+#define backlight_hw_on() _backlight_hw_on()
-#define _backlight_off() _backlight_hw_off()
+#define backlight_hw_off() _backlight_hw_off()
 #else
-#define _backlight_on_isr() _backlight_hw_on()
+#define backlight_hw_on_isr() _backlight_hw_on()
-#define _backlight_off_isr() _backlight_hw_off()
+#define backlight_hw_off_isr() _backlight_hw_off()
-#define _backlight_on_normal() _backlight_hw_on()
+#define backlight_hw_on_normal() _backlight_hw_on()
-#define _backlight_off_normal() _backlight_hw_off()
+#define backlight_hw_off_normal() _backlight_hw_off()
 #endif
 #elif defined(IPOD_1G2G) || defined(IPOD_3G)
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #endif
 #endif
diff --git a/firmware/target/arm/ipod/button-1g-3g.c b/firmware/target/arm/ipod/button-1g-3g.c
index 045a0f6d8a..67aa7eb336 100644
--- a/firmware/target/arm/ipod/button-1g-3g.c
+++ b/firmware/target/arm/ipod/button-1g-3g.c
@@ -66,7 +66,7 @@ static void handle_scroll_wheel(int new_scroll)
    static int prev_scroll = -1;
    static int direction = 0;
    static int count = 0;
-    static long next_backlight_on = 0;
+    static long nextbacklight_hw_on = 0;
    static unsigned long last_wheel_usec = 0;
    static unsigned long wheel_delta = 1ul << 24;
@@ -96,10 +96,10 @@ static void handle_scroll_wheel(int new_scroll)
    }
    /* poke backlight every 1/4s of activity */
-    if (TIME_AFTER(current_tick, next_backlight_on)) {
+    if (TIME_AFTER(current_tick, nextbacklight_hw_on)) {
        backlight_on();
        reset_poweroff_timer();
-        next_backlight_on = current_tick + HZ/4;
+        nextbacklight_hw_on = current_tick + HZ/4;
    }
    /* has wheel travelled far enough? */
@@ -152,7 +152,7 @@ static void handle_scroll_wheel(int new_scroll)
        wheel_velocity = v;
        /* ensure backlight never gets stuck for an extended period if tick
         * wrapped such that next poke is very far ahead */
-        next_backlight_on = current_tick - 1;
+        nextbacklight_hw_on = current_tick - 1;
    }
    else {
        /* some velocity filtering to smooth things out */
diff --git a/firmware/target/arm/ipod/button-mini1g.c b/firmware/target/arm/ipod/button-mini1g.c
index d4a75c90d8..a508958de1 100644
--- a/firmware/target/arm/ipod/button-mini1g.c
+++ b/firmware/target/arm/ipod/button-mini1g.c
@@ -60,7 +60,7 @@ static void handle_scroll_wheel(int new_scroll)
    static int prev_scroll = -1;
    static int direction = 0;
    static int count = 0;
-    static long next_backlight_on = 0;
+    static long nextbacklight_hw_on = 0;
    int wheel_keycode = BUTTON_NONE;
    int scroll;
@@ -92,10 +92,10 @@ static void handle_scroll_wheel(int new_scroll)
    }
   /* poke backlight every 1/4s of activity */
-    if (TIME_AFTER(current_tick, next_backlight_on)) {
+    if (TIME_AFTER(current_tick, nextbacklight_hw_on)) {
        backlight_on();
        reset_poweroff_timer();
-        next_backlight_on = current_tick + HZ/4;
+        nextbacklight_hw_on = current_tick + HZ/4;
    }
    if (++count < WHEEL_BASE_SENSITIVITY)
@@ -144,7 +144,7 @@ static void handle_scroll_wheel(int new_scroll)
        wheel_velocity = v;
        /* ensure backlight never gets stuck for an extended period if tick
         * wrapped such that next poke is very far ahead */
-        next_backlight_on = current_tick - 1;
+        nextbacklight_hw_on = current_tick - 1;
    }
    else {
        /* some velocity filtering to smooth things out */
diff --git a/firmware/target/arm/ipod/lcd-color_nano.c b/firmware/target/arm/ipod/lcd-color_nano.c
index c7676fa721..67d26aa862 100644
--- a/firmware/target/arm/ipod/lcd-color_nano.c
+++ b/firmware/target/arm/ipod/lcd-color_nano.c
@@ -122,7 +122,7 @@ void lcd_shutdown(void) {
 #if defined(IPOD_NANO)
    _backlight_hw_enable(false);
 #elif defined(IPOD_COLOR)
-    _backlight_off();
+    backlight_hw_off();
 #endif
    if ((lcd_type&1) == 0) {
diff --git a/firmware/target/arm/iriver/backlight-target.h b/firmware/target/arm/iriver/backlight-target.h
index a27b489319..3882964207 100644
--- a/firmware/target/arm/iriver/backlight-target.h
+++ b/firmware/target/arm/iriver/backlight-target.h
@@ -21,8 +21,8 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/iriver/h10/backlight-h10.c b/firmware/target/arm/iriver/h10/backlight-h10.c
index db10f39057..80dfdd88c1 100644
--- a/firmware/target/arm/iriver/h10/backlight-h10.c
+++ b/firmware/target/arm/iriver/h10/backlight-h10.c
@@ -25,7 +25,7 @@
 #include "backlight-target.h"
 #include "lcd.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -33,7 +33,7 @@ void _backlight_on(void)
    GPIO_SET_BITWISE(GPIOL_OUTPUT_VAL, 0x20);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 0x20);
 #ifdef HAVE_LCD_ENABLE
diff --git a/firmware/target/arm/olympus/mrobe-100/backlight-mr100.c b/firmware/target/arm/olympus/mrobe-100/backlight-mr100.c
index f3891c5000..b39010ff0e 100644
--- a/firmware/target/arm/olympus/mrobe-100/backlight-mr100.c
+++ b/firmware/target/arm/olympus/mrobe-100/backlight-mr100.c
@@ -28,22 +28,22 @@
 static const int log_brightness[12] = {0,4,8,12,20,28,40,60,88,124,176,255};
 /* Returns the current state of the backlight (true=ON, false=OFF). */
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    return (GPO32_ENABLE & 0x1000000) ? true : false;
 }
-void _backlight_hw_on(void)
+void backlight_hw_on(void)
 {
    GPO32_ENABLE |= 0x1000000;
 }
-void _backlight_hw_off(void)
+void backlight_hw_off(void)
 {
    GPO32_ENABLE &= ~0x1000000;
 }
-void _buttonlight_set_brightness(int brightness)
+void buttonlight_hw_brightness(int brightness)
 {
    /* clamp the brightness value */
    brightness = MAX(0, MIN(15, brightness));
@@ -51,13 +51,13 @@ void _buttonlight_set_brightness(int brightness)
    outl(MIN_BRIGHTNESS-(log_brightness[brightness - 1] << 16), 0x7000a010);
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    /* turn on all touchpad leds */
    GPIOA_OUTPUT_VAL |= BUTTONLIGHT_ALL;
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    /* turn off all touchpad leds */
    GPIOA_OUTPUT_VAL &= ~BUTTONLIGHT_ALL;
diff --git a/firmware/target/arm/olympus/mrobe-100/backlight-target.h b/firmware/target/arm/olympus/mrobe-100/backlight-target.h
index df25106d1a..725e1ad622 100644
--- a/firmware/target/arm/olympus/mrobe-100/backlight-target.h
+++ b/firmware/target/arm/olympus/mrobe-100/backlight-target.h
@@ -22,23 +22,20 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void); /* Returns backlight current state (true=ON). */
+bool backlight_hw_init(void); /* Returns backlight current state (true=ON). */
 void _backlight_hw_on(void);
 void _backlight_hw_off(void);
 #ifdef HAVE_REMOTE_LCD
-void _remote_backlight_on(void);
+void remote_backlight_hw_on(void);
-void _remote_backlight_off(void);
+void remote_backlight_hw_off(void);
 #endif
-#ifdef BOOTLOADER
+#ifndef BOOTLOADER
-#define _backlight_on() _backlight_hw_on()
+#define _backlight_on_isr() backlight_hw_on()
-#define _backlight_off() _backlight_hw_off()
+#define _backlight_off_isr() backlight_hw_off()
-#else
+#define _backlight_on_normal() backlight_hw_on()
-#define _backlight_on_isr() _backlight_hw_on()
+#define _backlight_off_normal() backlight_hw_off()
-#define _backlight_off_isr() _backlight_hw_off()
-#define _backlight_on_normal() _backlight_hw_on()
-#define _backlight_off_normal() _backlight_hw_off()
 #define _BACKLIGHT_FADE_BOOST
 #endif
@@ -53,8 +50,8 @@ void _remote_backlight_off(void);
                              BUTTONLIGHT_DISPLAY | BUTTONLIGHT_LEFT  | \
                              BUTTONLIGHT_RIGHT   | BUTTONLIGHT_SCROLL)
-void _buttonlight_set_brightness(int brightness);
+void buttonlight_hw_brightness(int brightness);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/olympus/mrobe-100/lcd-remote-mr100.c b/firmware/target/arm/olympus/mrobe-100/lcd-remote-mr100.c
index 34b114910a..22bc4fb0d8 100644
--- a/firmware/target/arm/olympus/mrobe-100/lcd-remote-mr100.c
+++ b/firmware/target/arm/olympus/mrobe-100/lcd-remote-mr100.c
@@ -552,13 +552,13 @@ void lcd_remote_update_rect(int x, int y, int width, int height)
    rc_status |= RC_UPDATE_LCD;
 }
-void _remote_backlight_on(void)
+void remote_backlight_hw_on(void)
 {
    rc_status |= RC_BACKLIGHT_ON;
    rc_status |= RC_UPDATE_CONTROLLER;
 }
-void _remote_backlight_off(void)
+void remote_backlight_hw_off(void)
 {
    rc_status &= ~RC_BACKLIGHT_ON;
    rc_status |= RC_UPDATE_CONTROLLER;
diff --git a/firmware/target/arm/pbell/vibe500/backlight-target.h b/firmware/target/arm/pbell/vibe500/backlight-target.h
index 7fd6d877fb..396fea3007 100644
--- a/firmware/target/arm/pbell/vibe500/backlight-target.h
+++ b/firmware/target/arm/pbell/vibe500/backlight-target.h
@@ -21,18 +21,18 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
 #ifdef HAVE_BUTTON_LIGHT
-void _buttonlight_on(void);
+voidbuttonlight_hw_on(void);
-void _buttonlight_off(void);
+voidbuttonlight_hw_off(void);
-void _buttonlight_set_brightness(int brightness);
+voidbuttonlight_hw_set_brightness(int brightness);
 #endif
 #endif /* BACKLIGHT_TARGET.H */
diff --git a/firmware/target/arm/pbell/vibe500/backlight-vibe500.c b/firmware/target/arm/pbell/vibe500/backlight-vibe500.c
index ab71012bdb..1d03ddddf0 100644
--- a/firmware/target/arm/pbell/vibe500/backlight-vibe500.c
+++ b/firmware/target/arm/pbell/vibe500/backlight-vibe500.c
@@ -27,7 +27,7 @@
 #include "lcd.h"
 #include "synaptics-mep.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -35,7 +35,7 @@ void _backlight_on(void)
    GPIO_SET_BITWISE(GPIOJ_OUTPUT_VAL, 0x01);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOJ_OUTPUT_VAL, 0x01);
 #ifdef HAVE_LCD_ENABLE
@@ -47,7 +47,7 @@ void _backlight_off(void)
 static const int brightness_vals[16] =
                {255,237,219,201,183,165,147,130,112,94,76,58,40,22,5,0};
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    /* From PB Vibe Bootloader and OF */
    DEV_INIT1&=0xFFFF3F3F;
@@ -60,7 +60,7 @@ void _backlight_set_brightness(int brightness)
 #ifdef HAVE_BUTTON_LIGHT
 static unsigned short buttonlight_status = 0;
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    if (!buttonlight_status)
    {
@@ -69,7 +69,7 @@ void _buttonlight_on(void)
    }
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    if (buttonlight_status)
    {
@@ -78,7 +78,7 @@ void _buttonlight_off(void)
    }
 }
-void _buttonlight_set_brightness(int brightness)
+void buttonlight_hw_brightness(int brightness)
 {
    /* no brightness control, but lights stays on - for compatibility */
    (void)brightness;
diff --git a/firmware/target/arm/philips/hdd1630/backlight-hdd1630.c b/firmware/target/arm/philips/hdd1630/backlight-hdd1630.c
index 95a9ad8b86..efa85723a1 100644
--- a/firmware/target/arm/philips/hdd1630/backlight-hdd1630.c
+++ b/firmware/target/arm/philips/hdd1630/backlight-hdd1630.c
@@ -29,13 +29,13 @@
 static const int brightness_vals[16] =
                {255,237,219,201,183,165,147,130,112,94,76,58,40,22,5,0};
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    outl(0x80000000 | (brightness_vals[brightness-1] << 16), 0x7000a000);
 }
 #endif
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true);
@@ -45,7 +45,7 @@ void _backlight_on(void)
    GPO32_VAL    |= 0x400;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPO32_ENABLE |= 0x400;
    GPO32_VAL    &=~0x400;
@@ -60,7 +60,7 @@ void _backlight_off(void)
 static unsigned short buttonight_brightness = DEFAULT_BRIGHTNESS_SETTING - 1;
 static unsigned short buttonlight_status = 0;
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    if (!buttonlight_status)
    {
@@ -69,7 +69,7 @@ void _buttonlight_on(void)
    }
 }
 
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    if (buttonlight_status)
    {
@@ -78,7 +78,7 @@ void _buttonlight_off(void)
    }
 }
-void _buttonlight_set_brightness(int brightness)
+void buttonlight_hw_brightness(int brightness)
 {
    buttonight_brightness = brightness - 1;
    touchpad_set_buttonlights(BUTTONLIGHT_MASK, buttonight_brightness);
diff --git a/firmware/target/arm/philips/hdd1630/backlight-target.h b/firmware/target/arm/philips/hdd1630/backlight-target.h
index 63f3f5a8df..d79f09a8a6 100644
--- a/firmware/target/arm/philips/hdd1630/backlight-target.h
+++ b/firmware/target/arm/philips/hdd1630/backlight-target.h
@@ -21,18 +21,18 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
 #ifdef HAVE_BUTTON_LIGHT
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
-void _buttonlight_set_brightness(int brightness);
+void buttonlight_hw_brightness(int brightness);
 #endif
 #endif
diff --git a/firmware/target/arm/philips/hdd6330/backlight-hdd6330.c b/firmware/target/arm/philips/hdd6330/backlight-hdd6330.c
index 46c03e712e..b6422a5aa9 100644
--- a/firmware/target/arm/philips/hdd6330/backlight-hdd6330.c
+++ b/firmware/target/arm/philips/hdd6330/backlight-hdd6330.c
@@ -29,13 +29,13 @@
 static const int brightness_vals[16] =
                {255,237,219,201,183,165,147,130,112,94,76,58,40,22,5,0};
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    outl(0x80000000 | (brightness_vals[brightness-1] << 16), 0x7000a000);
 }
 #endif
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true);
@@ -45,7 +45,7 @@ void _backlight_on(void)
    GPO32_VAL    |= 0x400;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPO32_ENABLE |= 0x400;
    GPO32_VAL    &= ~0x400;
@@ -60,7 +60,7 @@ void _backlight_off(void)
 static unsigned short buttonight_brightness = DEFAULT_BRIGHTNESS_SETTING - 1;
 static unsigned short buttonlight_status = 0;
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    if (!buttonlight_status)
    {
@@ -77,7 +77,7 @@ void _buttonlight_on(void)
    }
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    if (buttonlight_status)
    {
@@ -89,7 +89,7 @@ void _buttonlight_off(void)
    }
 }
-void _buttonlight_set_brightness(int brightness)
+void buttonlight_hw_brightness(int brightness)
 {
    touchpad_set_parameter(0x01,0x21,0x01);
    touchpad_set_parameter(0x00,0x22,0x15);
diff --git a/firmware/target/arm/philips/hdd6330/backlight-target.h b/firmware/target/arm/philips/hdd6330/backlight-target.h
index 63f3f5a8df..d79f09a8a6 100644
--- a/firmware/target/arm/philips/hdd6330/backlight-target.h
+++ b/firmware/target/arm/philips/hdd6330/backlight-target.h
@@ -21,18 +21,18 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
 #ifdef HAVE_BUTTON_LIGHT
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
-void _buttonlight_set_brightness(int brightness);
+void buttonlight_hw_brightness(int brightness);
 #endif
 #endif
diff --git a/firmware/target/arm/philips/power-hdd.c b/firmware/target/arm/philips/power-hdd.c
index a7f1302a7c..d38c6de2b4 100644
--- a/firmware/target/arm/philips/power-hdd.c
+++ b/firmware/target/arm/philips/power-hdd.c
@@ -111,7 +111,7 @@ bool ide_powered(void)
 void power_off(void)
 {
-    _backlight_off();
+    backlight_hw_off();
    sleep(HZ/10);
    /* power off bit */
diff --git a/firmware/target/arm/philips/sa9200/backlight-sa9200.c b/firmware/target/arm/philips/sa9200/backlight-sa9200.c
index 0de4c05df5..7046d09910 100644
--- a/firmware/target/arm/philips/sa9200/backlight-sa9200.c
+++ b/firmware/target/arm/philips/sa9200/backlight-sa9200.c
@@ -27,12 +27,12 @@
 #include "synaptics-mep.h"
 #include "lcd.h"
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    ascodec_write(AS3514_DCDC15, brightness);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -40,13 +40,13 @@ void _backlight_on(void)
 #if (CONFIG_BACKLIGHT_FADING != BACKLIGHT_FADING_SW_SETTING) /* in bootloader/sim */
    /* if we set the brightness to the settings value, then fading up
     * is glitchy */
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
 #endif
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
@@ -58,7 +58,7 @@ void _backlight_off(void)
 #define BUTTONLIGHT_MAX  0x0f
 static unsigned short buttonlight_status = 0;
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    if (!buttonlight_status)
    {
@@ -68,7 +68,7 @@ void _buttonlight_on(void)
    }
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    if (buttonlight_status)
    {
diff --git a/firmware/target/arm/philips/sa9200/backlight-target.h b/firmware/target/arm/philips/sa9200/backlight-target.h
index 9d695e5a22..349f2e2b57 100644
--- a/firmware/target/arm/philips/sa9200/backlight-target.h
+++ b/firmware/target/arm/philips/sa9200/backlight-target.h
@@ -21,15 +21,15 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 int  __backlight_is_on(void);
 #ifdef HAVE_BUTTON_LIGHT
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
 #endif
diff --git a/firmware/target/arm/pnx0101/backlight-target.h b/firmware/target/arm/pnx0101/backlight-target.h
index 40152f1fda..7ebe85d66f 100644
--- a/firmware/target/arm/pnx0101/backlight-target.h
+++ b/firmware/target/arm/pnx0101/backlight-target.h
@@ -21,8 +21,8 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/pnx0101/iriver-ifp7xx/backlight-ifp7xx.c b/firmware/target/arm/pnx0101/iriver-ifp7xx/backlight-ifp7xx.c
index 6cf2422d60..8be7a59de2 100644
--- a/firmware/target/arm/pnx0101/iriver-ifp7xx/backlight-ifp7xx.c
+++ b/firmware/target/arm/pnx0101/iriver-ifp7xx/backlight-ifp7xx.c
@@ -24,12 +24,12 @@
 #include "backlight.h"
 #include "lcd.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    GPIO3_SET = 1;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPIO3_CLR = 1;
 }
diff --git a/firmware/target/arm/rk27xx/backlight-rk27xx.c b/firmware/target/arm/rk27xx/backlight-rk27xx.c
index 361d18c948..1756fcdb29 100644
--- a/firmware/target/arm/rk27xx/backlight-rk27xx.c
+++ b/firmware/target/arm/rk27xx/backlight-rk27xx.c
@@ -77,7 +77,7 @@ static const unsigned short lin_brightness[] = {
 };
 #endif
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* configure PD4 as output */
    GPIO_PDCON |= (1<<4);
@@ -105,7 +105,7 @@ bool _backlight_init(void)
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true);
@@ -120,7 +120,7 @@ void _backlight_on(void)
    PWMT0_CTRL |= (1<<3) | (1<<0);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* setup PWM0 pin as GPIO which is pulled low */
    SCU_IOMUXB_CON &= ~(1<<11);
@@ -135,7 +135,7 @@ void _backlight_off(void)
 #endif
 }
-void _backlight_set_brightness(int val)
+void backlight_hw_brightness(int val)
 {
    brightness = val & 0x1f;
    PWMT0_HRC = lin_brightness[brightness];
diff --git a/firmware/target/arm/rk27xx/backlight-target.h b/firmware/target/arm/rk27xx/backlight-target.h
index 91579b080d..a436186791 100644
--- a/firmware/target/arm/rk27xx/backlight-target.h
+++ b/firmware/target/arm/rk27xx/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c
index f3d9aac168..c30eb8d812 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c
@@ -74,7 +74,7 @@ static unsigned char buttonlight_target;
 static unsigned short buttonlight_trigger_now;
 /* Assumes that the backlight has been initialized */
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    /* stop the interrupt from messing us up */
    backlight_control = BACKLIGHT_CONTROL_IDLE;
@@ -335,7 +335,7 @@ static void __backlight_dim(bool dim_now)
        backlight_control = BACKLIGHT_CONTROL_FADE;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -343,7 +343,7 @@ void _backlight_on(void)
    __backlight_dim(false);
 }    
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    __backlight_dim(true);
 }
@@ -373,12 +373,12 @@ static void __buttonlight_dim(bool dim_now)
        buttonlight_control = BUTTONLIGHT_CONTROL_FADE;
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    __buttonlight_dim(false);
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
 #ifndef BOOTLOADER
    if(buttonlight_get_current_timeout() > 0)
@@ -388,7 +388,7 @@ void _buttonlight_off(void)
        __buttonlight_off();
 }
-void _buttonlight_set_brightness(int brightness)
+void buttonlight_hw_brightness(int brightness)
 {
    /* stop the interrupt from messing us up */
    buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
@@ -396,7 +396,7 @@ void _buttonlight_set_brightness(int brightness)
    buttonlight_control = BUTTONLIGHT_CONTROL_SET;
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    unsigned char brightness = log_brightness[DEFAULT_BRIGHTNESS_SETTING];
    buttonlight_brightness = brightness;
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h
index 8db2b11041..ef30babc2f 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/backlight-target.h
@@ -43,12 +43,12 @@ void __buttonlight_trigger(void);
 /* See enum buttonlight_mode for available functions */
 void __buttonlight_mode(enum buttonlight_mode mode);
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
-void _buttonlight_set_brightness(int brightness);
+void buttonlight_hw_brightness(int brightness);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c
index ad9098dd8a..e31a633aca 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/power-meg-fx.c
@@ -81,8 +81,8 @@ void power_off(void)
    int(*reboot_point)(void);
    reboot_point=(void*)(unsigned char*) 0x00000000;
    /* turn off backlight and wait for 1 second */
-    _backlight_off();
+    backlight_hw_off();
-    _buttonlight_off();
+    buttonlight_hw_off();
    sleep(HZ);
    
    /* Do this to allow the drive to properly reset when player restarts 
diff --git a/firmware/target/arm/s3c2440/mini2440/backlight-mini2440.c b/firmware/target/arm/s3c2440/mini2440/backlight-mini2440.c
index b39bfc4949..c4b93da9bc 100644
--- a/firmware/target/arm/s3c2440/mini2440/backlight-mini2440.c
+++ b/firmware/target/arm/s3c2440/mini2440/backlight-mini2440.c
@@ -46,7 +46,7 @@ static unsigned char backlight_target;
 /* Assumes that the backlight has been initialized */
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    if (brightness < 0)
        brightness = 0;
@@ -86,22 +86,22 @@ static void led_control_service(void)
            backlight_control = BACKLIGHT_CONTROL_IDLE;
            break;
        case BACKLIGHT_CONTROL_OFF:
-            _backlight_set_brightness(0);
+            backlight_hw_brightness(0);
            backlight_control = BACKLIGHT_CONTROL_IDLE;
            break;
        case BACKLIGHT_CONTROL_ON:
-            _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+            backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
            backlight_control = BACKLIGHT_CONTROL_IDLE;
            break;
        case BACKLIGHT_CONTROL_SET:
            /* TODO: This is probably wrong since it sets a fixed value.
            It was a fixed value of 255 before, but that was even more wrong
            since it accessed the log_brightness buffer out of bounds */
-            _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+            backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
            backlight_control = BACKLIGHT_CONTROL_IDLE;
            break;
        case BACKLIGHT_CONTROL_FADE:
-            _backlight_set_brightness(0);
+            backlight_hw_brightness(0);
            backlight_control = BACKLIGHT_CONTROL_IDLE;
            break;
        default:
@@ -127,7 +127,7 @@ static void __backlight_dim(bool dim_now)
        backlight_control = BACKLIGHT_CONTROL_FADE;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -135,13 +135,13 @@ void _backlight_on(void)
    __backlight_dim(false);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    __backlight_dim(true);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    unsigned char brightness = log_brightness[DEFAULT_BRIGHTNESS_SETTING];
    _backlight_brightness = brightness;
diff --git a/firmware/target/arm/s3c2440/mini2440/backlight-target.h b/firmware/target/arm/s3c2440/mini2440/backlight-target.h
index c804f16bcc..ceb6824841 100644
--- a/firmware/target/arm/s3c2440/mini2440/backlight-target.h
+++ b/firmware/target/arm/s3c2440/mini2440/backlight-target.h
@@ -23,9 +23,9 @@
 #define GPIO_LCD_PWR (1 << 4)   /* GPIO.G4 */
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
diff --git a/firmware/target/arm/s5l8700/backlight-meizu.c b/firmware/target/arm/s5l8700/backlight-meizu.c
index 4eb6967b94..d5c9a22f82 100644
--- a/firmware/target/arm/s5l8700/backlight-meizu.c
+++ b/firmware/target/arm/s5l8700/backlight-meizu.c
@@ -32,7 +32,7 @@
    level. This makes the brightness curve more linear to the human eye.
 */
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    /* pwm = round(sqrt(2)**x), where brightness level x = 1..16 */
    static const unsigned int logtable[] =
@@ -42,21 +42,21 @@ void _backlight_set_brightness(int brightness)
    TCDATA0 = logtable[brightness];
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    /* configure backlight pin P0.2 as timer PWM output */
    PCON0 = ((PCON0 & ~(3 << 4)) | (2 << 4));
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* configure backlight pin P0.2 as GPIO and switch off */
    PCON0 = ((PCON0 & ~(3 << 4)) | (1 << 4));
    PDAT0 &= ~(1 << 2);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* enable timer clock */
    PWRCON &= ~(1 << 4);
@@ -72,7 +72,7 @@ bool _backlight_init(void)
    TCPRE = 20;         /* prescaler */
    TCCMD = (1 << 0);   /* TC_EN */
   
-    _backlight_on();
+    backlight_hw_on();
    return true;
 }
diff --git a/firmware/target/arm/s5l8700/backlight-target.h b/firmware/target/arm/s5l8700/backlight-target.h
index 91579b080d..a436186791 100644
--- a/firmware/target/arm/s5l8700/backlight-target.h
+++ b/firmware/target/arm/s5l8700/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
diff --git a/firmware/target/arm/s5l8700/ipodnano2g/backlight-nano2g.c b/firmware/target/arm/s5l8700/ipodnano2g/backlight-nano2g.c
index 3e0e7460c4..b38e0f17f5 100644
--- a/firmware/target/arm/s5l8700/ipodnano2g/backlight-nano2g.c
+++ b/firmware/target/arm/s5l8700/ipodnano2g/backlight-nano2g.c
@@ -32,12 +32,12 @@ void lcd_awake(void);
 void lcd_update(void);
 #endif
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    pmu_write(0x28, brightness);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_SLEEP
    if (!lcd_active())
@@ -50,18 +50,18 @@ void _backlight_on(void)
    pmu_write(0x29, 1);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    pmu_write(0x29, 0);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    pmu_write(0x2a, 6);
    pmu_write(0x28, 0x2e);
    pmu_write(0x2b, 20);
-    _backlight_on();
+    backlight_hw_on();
    return true;
 }
diff --git a/firmware/target/arm/s5l8700/yps3/backlight-target.h b/firmware/target/arm/s5l8700/yps3/backlight-target.h
index 0507be4f76..74ea0aa035 100644
--- a/firmware/target/arm/s5l8700/yps3/backlight-target.h
+++ b/firmware/target/arm/s5l8700/yps3/backlight-target.h
@@ -21,13 +21,13 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/arm/s5l8700/yps3/backlight-yps3.c b/firmware/target/arm/s5l8700/yps3/backlight-yps3.c
index 7cf3a44805..ae3cc3b0a1 100644
--- a/firmware/target/arm/s5l8700/yps3/backlight-yps3.c
+++ b/firmware/target/arm/s5l8700/yps3/backlight-yps3.c
@@ -35,7 +35,7 @@
    are three individually controllable groups: menu/back, cursor, middle).
 */
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    /* pwm = round(16 * 16**(x/16)), where brightness level x = 1..16 */
    static const unsigned int logtable[] =
@@ -45,39 +45,39 @@ void _backlight_set_brightness(int brightness)
    TADATA0 = logtable[brightness];
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    /* configure backlight pin P0.0 as timer PWM output */
    PCON0 = ((PCON0 & ~(3 << 0)) | (2 << 0));
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    /* configure backlight pin P0.0 as GPIO and switch off */
    PCON0 = ((PCON0 & ~(3 << 0)) | (1 << 0));
    PDAT0 &= ~(1 << 0);
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    PDAT3 |= (3 << 2);
    PDAT4 |= (1 << 2);
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    PDAT3 &= ~(3 << 2);
    PDAT4 &= ~(1 << 2);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* Enable button LEDs: P3.2 (menu/back), P3.3 (cursor), P4.2 (middle) */
    PCON3 = (PCON3 & ~0x0000FF00) | 0x00001100;
    PCON4 = (PCON4 & ~0x00000F00) | 0x00000100;
-    _buttonlight_off();
+    buttonlight_hw_off();
    /* enable timer clock */
    PWRCON &= ~(1 << 4);
@@ -93,7 +93,7 @@ bool _backlight_init(void)
    TAPRE = 20;         /* prescaler */
    TACMD = (1 << 0);   /* TA_EN */
   
-    _backlight_on();
+    backlight_hw_on();
    return true;
 }
diff --git a/firmware/target/arm/s5l8702/ipod6g/backlight-ipod6g.c b/firmware/target/arm/s5l8702/ipod6g/backlight-ipod6g.c
index 481a2643bb..7d1c8bde13 100644
--- a/firmware/target/arm/s5l8702/ipod6g/backlight-ipod6g.c
+++ b/firmware/target/arm/s5l8702/ipod6g/backlight-ipod6g.c
@@ -32,12 +32,12 @@ void lcd_awake(void);
 void lcd_update(void);
 #endif
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    pmu_write(0x28, brightness);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_SLEEP
    if (!lcd_active())
@@ -50,20 +50,20 @@ void _backlight_on(void)
    pmu_write(0x29, 1);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    pmu_write(0x29, 0);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* LEDCTL: overvoltage protection enabled, OCP limit is 500mA */
    pmu_write(0x2a, 0x05);
    pmu_write(0x2b, 0x14);  /* T_dimstep = 16 * value / 32768 */
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
-    _backlight_on();
+    backlight_hw_on();
    return true;
 }
diff --git a/firmware/target/arm/s5l8702/ipod6g/backlight-target.h b/firmware/target/arm/s5l8702/ipod6g/backlight-target.h
index 05a8addfea..21ff6c30e1 100644
--- a/firmware/target/arm/s5l8702/ipod6g/backlight-target.h
+++ b/firmware/target/arm/s5l8702/ipod6g/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
diff --git a/firmware/target/arm/samsung/backlight-target.h b/firmware/target/arm/samsung/backlight-target.h
index a27b489319..3882964207 100644
--- a/firmware/target/arm/samsung/backlight-target.h
+++ b/firmware/target/arm/samsung/backlight-target.h
@@ -21,8 +21,8 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/samsung/yh820/backlight-yh820.c b/firmware/target/arm/samsung/yh820/backlight-yh820.c
index 0bbdb4f7d4..b24f8128c4 100644
--- a/firmware/target/arm/samsung/yh820/backlight-yh820.c
+++ b/firmware/target/arm/samsung/yh820/backlight-yh820.c
@@ -25,7 +25,7 @@
 #include "backlight-target.h"
 #include "lcd.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_SLEEP
    backlight_lcd_sleep_countdown(false); /* stop counter */
@@ -36,7 +36,7 @@ void _backlight_on(void)
    GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x2);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x2);
 #ifdef HAVE_LCD_ENABLE
diff --git a/firmware/target/arm/samsung/yh920/backlight-yh920.c b/firmware/target/arm/samsung/yh920/backlight-yh920.c
index 0bbdb4f7d4..b24f8128c4 100644
--- a/firmware/target/arm/samsung/yh920/backlight-yh920.c
+++ b/firmware/target/arm/samsung/yh920/backlight-yh920.c
@@ -25,7 +25,7 @@
 #include "backlight-target.h"
 #include "lcd.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_SLEEP
    backlight_lcd_sleep_countdown(false); /* stop counter */
@@ -36,7 +36,7 @@ void _backlight_on(void)
    GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x2);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x2);
 #ifdef HAVE_LCD_ENABLE
diff --git a/firmware/target/arm/samsung/yh925/backlight-yh925.c b/firmware/target/arm/samsung/yh925/backlight-yh925.c
index 5f29f9f770..8eb287b61b 100644
--- a/firmware/target/arm/samsung/yh925/backlight-yh925.c
+++ b/firmware/target/arm/samsung/yh925/backlight-yh925.c
@@ -25,7 +25,7 @@
 #include "backlight-target.h"
 #include "lcd.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_SLEEP
    backlight_lcd_sleep_countdown(false); /* stop counter */
@@ -36,7 +36,7 @@ void _backlight_on(void)
    GPIO_SET_BITWISE(GPIOF_OUTPUT_VAL, 0x1);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOF_OUTPUT_VAL, 0x1);
 #ifdef HAVE_LCD_ENABLE
diff --git a/firmware/target/arm/sandisk/backlight-c200_e200.c b/firmware/target/arm/sandisk/backlight-c200_e200.c
index 0280604526..ad1a6d9e46 100644
--- a/firmware/target/arm/sandisk/backlight-c200_e200.c
+++ b/firmware/target/arm/sandisk/backlight-c200_e200.c
@@ -26,12 +26,12 @@
 #include "ascodec.h"
 #include "as3514.h"
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    ascodec_write(AS3514_DCDC15, brightness);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd + visible display */
@@ -39,19 +39,19 @@ void _backlight_on(void)
 #if (CONFIG_BACKLIGHT_FADING != BACKLIGHT_FADING_SW_SETTING) /* in bootloader/sim */
    /* if we set the brightness to the settings value, then fading up
     * is glitchy */
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
 #endif
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
-    _backlight_set_brightness(0);
+    backlight_hw_brightness(0);
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off visible display */
 #endif
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    GPIO_SET_BITWISE(GPIOG_OUTPUT_VAL, 0x80);
 #ifdef SANSA_C200
@@ -59,7 +59,7 @@ void _buttonlight_on(void)
 #endif
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOG_OUTPUT_VAL, 0x80);
 #ifdef SANSA_C200
diff --git a/firmware/target/arm/sandisk/backlight-target.h b/firmware/target/arm/sandisk/backlight-target.h
index 1f5e475a42..cbe26f54da 100644
--- a/firmware/target/arm/sandisk/backlight-target.h
+++ b/firmware/target/arm/sandisk/backlight-target.h
@@ -21,11 +21,11 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/sandisk/sansa-e200/button-e200.c b/firmware/target/arm/sandisk/sansa-e200/button-e200.c
index 73279b44cf..0df71f4815 100644
--- a/firmware/target/arm/sandisk/sansa-e200/button-e200.c
+++ b/firmware/target/arm/sandisk/sansa-e200/button-e200.c
@@ -135,7 +135,7 @@ void clickwheel_int(void)
    static int prev_keypost = BUTTON_NONE;
    static int count = 0;
    static int fast_mode = 0;
-    static long next_backlight_on = 0;
+    static long nextbacklight_hw_on = 0;
    static unsigned long prev_usec[WHEEL_BASE_SENSITIVITY] = { 0 };
    static unsigned long delta = 1ul << 24;
@@ -166,11 +166,11 @@ void clickwheel_int(void)
        velocity = 0;
    }
-    if (TIME_AFTER(current_tick, next_backlight_on))
+    if (TIME_AFTER(current_tick, nextbacklight_hw_on))
    {
        /* Poke backlight to turn it on or maintain it no more often
         * than every 1/4 second */
-        next_backlight_on = current_tick + HZ/4;
+        nextbacklight_hw_on = current_tick + HZ/4;
        backlight_on();
 #ifdef HAVE_BUTTON_LIGHT
        buttonlight_on();
@@ -209,7 +209,7 @@ void clickwheel_int(void)
        velocity = v;
        /* Ensure backlight never gets stuck for an extended period if tick
         * wrapped such that next poke is very far ahead */
-        next_backlight_on = current_tick - 1;
+        nextbacklight_hw_on = current_tick - 1;
    }
    else
    {
diff --git a/firmware/target/arm/sandisk/sansa-view/backlight-target.h b/firmware/target/arm/sandisk/sansa-view/backlight-target.h
index 545ee93677..c51875754d 100644
--- a/firmware/target/arm/sandisk/sansa-view/backlight-target.h
+++ b/firmware/target/arm/sandisk/sansa-view/backlight-target.h
@@ -24,10 +24,10 @@
 #include <stdbool.h>
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _buttonlight_on(void);
+void buttonlight_hw_on(void);
-void _buttonlight_off(void);
+void buttonlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/sandisk/sansa-view/backlight-view.c b/firmware/target/arm/sandisk/sansa-view/backlight-view.c
index c065ec3f2a..637e5b4269 100644
--- a/firmware/target/arm/sandisk/sansa-view/backlight-view.c
+++ b/firmware/target/arm/sandisk/sansa-view/backlight-view.c
@@ -25,7 +25,7 @@
 #include "lcd.h"
 #include "backlight.h"
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    GPIO_SET_BITWISE(GPIOD_ENABLE, 0x01);
    GPIO_SET_BITWISE(GPIOD_OUTPUT_EN, 0x01);
@@ -44,22 +44,22 @@ bool _backlight_init(void)
    return true;
 }
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    (void)brightness;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOD_OUTPUT_VAL, 0x01);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    GPIO_SET_BITWISE(GPIOD_OUTPUT_VAL, 0x01);
 }
-void _buttonlight_off(void)
+void buttonlight_hw_off(void)
 {
    GPIO_CLEAR_BITWISE(GPIOA_OUTPUT_VAL, 0x02); /* vertical buttonlight */
    GPIO_CLEAR_BITWISE(GPIOA_OUTPUT_VAL, 0x01); /* horizontal buttonlight */
@@ -70,7 +70,7 @@ void _buttonlight_off(void)
    GPIO_CLEAR_BITWISE(GPIOR_OUTPUT_VAL, 0x10); /* scrollwheel left led */
 }
-void _buttonlight_on(void)
+void buttonlight_hw_on(void)
 {
    GPIO_SET_BITWISE(GPIOA_OUTPUT_VAL, 0x02); /* vertical buttonlight */
    GPIO_SET_BITWISE(GPIOA_OUTPUT_VAL, 0x01); /* horizontal buttonlight */
diff --git a/firmware/target/arm/tatung/tpj1022/backlight-target.h b/firmware/target/arm/tatung/tpj1022/backlight-target.h
index f82dc567ef..4a5e677599 100644
--- a/firmware/target/arm/tatung/tpj1022/backlight-target.h
+++ b/firmware/target/arm/tatung/tpj1022/backlight-target.h
@@ -24,8 +24,8 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-#define _backlight_init() true
+#define backlight_hw_init() true
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #endif
diff --git a/firmware/target/arm/tatung/tpj1022/backlight-tpj1022.c b/firmware/target/arm/tatung/tpj1022/backlight-tpj1022.c
index 87ec19fa80..d63387728b 100644
--- a/firmware/target/arm/tatung/tpj1022/backlight-tpj1022.c
+++ b/firmware/target/arm/tatung/tpj1022/backlight-tpj1022.c
@@ -27,7 +27,7 @@
 #include "system.h"
 #include "backlight.h"
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #if 0
    int level = disable_irq_save();
@@ -36,7 +36,7 @@ void _backlight_on(void)
 #endif
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
 #if 0
    int level = disable_irq_save();
diff --git a/firmware/target/arm/tcc77x/c100/backlight-target.h b/firmware/target/arm/tcc77x/c100/backlight-target.h
index 738a2f80ab..7ae71022f0 100644
--- a/firmware/target/arm/tcc77x/c100/backlight-target.h
+++ b/firmware/target/arm/tcc77x/c100/backlight-target.h
@@ -23,15 +23,15 @@
 #include "tcc77x.h"
-#define _backlight_init() true
+#define backlight_hw_init() true
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    /* Enable backlight */
    GPIOE |= 0x2;
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    /* Disable backlight */
    GPIOE &= ~0x2;
diff --git a/firmware/target/arm/tcc77x/iaudio7/backlight-target.h b/firmware/target/arm/tcc77x/iaudio7/backlight-target.h
index 9a6182ff02..0b227cd11c 100644
--- a/firmware/target/arm/tcc77x/iaudio7/backlight-target.h
+++ b/firmware/target/arm/tcc77x/iaudio7/backlight-target.h
@@ -26,7 +26,7 @@
 void power_touch_panel(bool on);
-static inline bool _backlight_init(void)
+static inline bool backlight_hw_init(void)
 {
    GPIOD_DIR |= 0x2;
    /* set backlight on by default, since the screen is unreadable without it */
@@ -34,13 +34,13 @@ static inline bool _backlight_init(void)
    return true;
 }
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    GPIOD |= 0x2;
    power_touch_panel(true);
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    GPIOD &= ~0x2;
    power_touch_panel(false);
diff --git a/firmware/target/arm/tcc77x/logikdax/backlight-target.h b/firmware/target/arm/tcc77x/logikdax/backlight-target.h
index 7630a8332e..202e118606 100644
--- a/firmware/target/arm/tcc77x/logikdax/backlight-target.h
+++ b/firmware/target/arm/tcc77x/logikdax/backlight-target.h
@@ -23,15 +23,15 @@
 #include "tcc77x.h"
-#define _backlight_init() true
+#define backlight_hw_init() true
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    /* Enable backlight */
    GPIOD |= 0x10;
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    /* Disable backlight */
    GPIOD &= ~0x10;
diff --git a/firmware/target/arm/tcc77x/m200/backlight-target.h b/firmware/target/arm/tcc77x/m200/backlight-target.h
index bbc9037075..d73ac78852 100644
--- a/firmware/target/arm/tcc77x/m200/backlight-target.h
+++ b/firmware/target/arm/tcc77x/m200/backlight-target.h
@@ -23,19 +23,19 @@
 #include "tcc77x.h"
-static inline bool _backlight_init(void)
+static inline bool backlight_hw_init(void)
 {
    GPIOA_DIR |= 0x40;
    return true;
 }
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    /* Enable backlight */
    GPIOA |= 0x40;
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    /* Disable backlight */
    GPIOA &= ~0x40;
diff --git a/firmware/target/arm/tcc780x/cowond2/backlight-cowond2.c b/firmware/target/arm/tcc780x/cowond2/backlight-cowond2.c
index 5668023f28..37ee0e57a1 100644
--- a/firmware/target/arm/tcc780x/cowond2/backlight-cowond2.c
+++ b/firmware/target/arm/tcc780x/cowond2/backlight-cowond2.c
@@ -26,15 +26,15 @@
 #include "tcc780x.h"
 #include "pmu-target.h"
-int _backlight_init(void)
+int backlight_hw_init(void)
 {
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
    /* set backlight on by default, since the screen is unreadable without it */
-    _backlight_on();
+    backlight_hw_on();
    return true;
 }
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    int level = disable_irq_save();
    
@@ -56,7 +56,7 @@ void _backlight_set_brightness(int brightness)
    restore_irq(level);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    if (get_pmu_type() == PCF50606)
    {
@@ -70,7 +70,7 @@ void _backlight_on(void)
    }
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    if (get_pmu_type() == PCF50606)
    {
diff --git a/firmware/target/arm/tcc780x/cowond2/backlight-target.h b/firmware/target/arm/tcc780x/cowond2/backlight-target.h
index dbb0baae43..6577f74474 100644
--- a/firmware/target/arm/tcc780x/cowond2/backlight-target.h
+++ b/firmware/target/arm/tcc780x/cowond2/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-int _backlight_init(void);
+int backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif
diff --git a/firmware/target/arm/tcc780x/cowond2/button-cowond2.c b/firmware/target/arm/tcc780x/cowond2/button-cowond2.c
index df2ea1f307..6c8541ef62 100644
--- a/firmware/target/arm/tcc780x/cowond2/button-cowond2.c
+++ b/firmware/target/arm/tcc780x/cowond2/button-cowond2.c
@@ -92,7 +92,7 @@ int button_read_device(int *data)
    if (!(GPIOA & 0x4))
        btn |= BUTTON_POWER;
-    if (btn & BUTTON_TOUCHSCREEN && !is_backlight_on(true))
+    if (btn & BUTTON_TOUCHSCREEN && !isbacklight_hw_on(true))
        old_data = *data = 0;
    return btn;
diff --git a/firmware/target/arm/tcc780x/cowond2/power-cowond2.c b/firmware/target/arm/tcc780x/cowond2/power-cowond2.c
index 09787289ac..6576afb09c 100644
--- a/firmware/target/arm/tcc780x/cowond2/power-cowond2.c
+++ b/firmware/target/arm/tcc780x/cowond2/power-cowond2.c
@@ -78,7 +78,7 @@ void power_init(void)
 void power_off(void)
 {
    /* Turn the backlight off first to avoid a bright stripe on power-off */
-    _backlight_off();
+    backlight_hw_off();
    sleep(HZ/10);
    /* Power off the player using the same mechanism as the OF */
diff --git a/firmware/target/arm/tms320dm320/creative-zvm/backlight-target.h b/firmware/target/arm/tms320dm320/creative-zvm/backlight-target.h
index c50ce6a128..4ebe3144cf 100644
--- a/firmware/target/arm/tms320dm320/creative-zvm/backlight-target.h
+++ b/firmware/target/arm/tms320dm320/creative-zvm/backlight-target.h
@@ -22,10 +22,10 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 /* true: backlight fades off - false: backlight fades on */
 void __backlight_dim(bool dim);
diff --git a/firmware/target/arm/tms320dm320/mrobe-500/backlight-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/backlight-mr500.c
index 0cebc1bd5c..0b338c1640 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/backlight-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/backlight-mr500.c
@@ -55,7 +55,7 @@ static void _backlight_write_brightness(int brightness)
    spi_block_transfer(SPI_target_BACKLIGHT, bl_command, 4, 0, 0);
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    lcd_awake(); /* power on lcd + visible display */
@@ -64,25 +64,25 @@ void _backlight_on(void)
 #endif
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    _backlight_write_brightness(0);
 }
 /* Assumes that the backlight has been initialized */
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    _backlight_write_brightness(brightness);
 }
 void __backlight_dim(bool dim_now)
 {
-    _backlight_set_brightness(dim_now ?
+    backlight_hw_brightness(dim_now ?
        DEFAULT_BRIGHTNESS_SETTING :
        DEFAULT_DIMNESS_SETTING);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    short read_value;
@@ -102,7 +102,7 @@ bool _backlight_init(void)
    spi_block_transfer(SPI_target_BACKLIGHT, commands[2], 2, 0, 0);
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
    return true;
 }
diff --git a/firmware/target/arm/tms320dm320/mrobe-500/backlight-target.h b/firmware/target/arm/tms320dm320/mrobe-500/backlight-target.h
index ab8ceacbb1..5e91cd691a 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/backlight-target.h
+++ b/firmware/target/arm/tms320dm320/mrobe-500/backlight-target.h
@@ -22,10 +22,10 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 /* true: backlight fades off - false: backlight fades on */
 void __backlight_dim(bool dim);
diff --git a/firmware/target/arm/tms320dm320/mrobe-500/lcd-remote-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/lcd-remote-mr500.c
index b001032322..e21e1fa193 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/lcd-remote-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/lcd-remote-mr500.c
@@ -292,13 +292,13 @@ void lcd_remote_update_rect(int x, int y, int width, int height)
    remote_state_control=REMOTE_CONTROL_DRAW;
 }
-void _remote_backlight_on(void)
+void remote_backlight_hw_on(void)
 {
    remote_power|=0x40;
    remote_state_control_next=REMOTE_CONTROL_POWER;
 }
-void _remote_backlight_off(void)
+void remote_backlight_hw_off(void)
 {
    remote_power&=~(0x40);
    remote_state_control_next=REMOTE_CONTROL_POWER;
diff --git a/firmware/target/arm/tms320dm320/mrobe-500/power-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/power-mr500.c
index d9e0d52191..77348317a6 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/power-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/power-mr500.c
@@ -75,7 +75,7 @@ bool ide_powered(void)
 void power_off(void)
 {
    /* turn off backlight and wait for 1 second */
-    _backlight_off();
+    backlight_hw_off();
 #if defined(HAVE_REMOTE_LCD)
    lcd_remote_sleep();
 #endif
diff --git a/firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.c b/firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.c
index c8b2c9623c..611bdbfde5 100644
--- a/firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.c
+++ b/firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.c
@@ -92,15 +92,15 @@ static void handle_wheel(unsigned char wheel)
    static unsigned char velocity = 0;
    static unsigned long wheel_delta = 1ul << 24;
    static unsigned char wheel_prev = 0;
-    static long next_backlight_on = 0;
+    static long nextbacklight_hw_on = 0;
    static int prev_key = -1;
    static int prev_key_post = 0;
-    if (TIME_AFTER(current_tick, next_backlight_on))
+    if (TIME_AFTER(current_tick, nextbacklight_hw_on))
    {
        backlight_on();
        reset_poweroff_timer();
-        next_backlight_on = current_tick + HZ/4;
+        nextbacklight_hw_on = current_tick + HZ/4;
    }
    if (wheel_prev < wheel)
diff --git a/firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c b/firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c
index 4104c21e52..c65d806635 100644
--- a/firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c
+++ b/firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c
@@ -50,7 +50,7 @@ static void _backlight_write_brightness(int brightness)
    IO_CLK_PWM1H = brightness*70;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_SLEEP
    if (!lcd_active())
@@ -67,7 +67,7 @@ void _backlight_on(void)
 #endif
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    _backlight_write_brightness(0);
@@ -77,23 +77,23 @@ void _backlight_off(void)
 }
 /* Assumes that the backlight has been initialized */
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    _backlight_write_brightness(brightness);
 }
 void __backlight_dim(bool dim_now)
 {
-    _backlight_set_brightness(dim_now ?
+    backlight_hw_brightness(dim_now ?
        DEFAULT_BRIGHTNESS_SETTING :
        DEFAULT_DIMNESS_SETTING);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    IO_CLK_PWM1C = 0x58D; /* as found in OF */
-    _backlight_set_brightness(backlight_brightness);
+    backlight_hw_brightness(backlight_brightness);
    return true;
 }
diff --git a/firmware/target/arm/tms320dm320/sansa-connect/backlight-target.h b/firmware/target/arm/tms320dm320/sansa-connect/backlight-target.h
index 89bd837cee..3a6fc8cf11 100644
--- a/firmware/target/arm/tms320dm320/sansa-connect/backlight-target.h
+++ b/firmware/target/arm/tms320dm320/sansa-connect/backlight-target.h
@@ -22,10 +22,10 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 /* true: backlight fades off - false: backlight fades on */
 void __backlight_dim(bool dim);
diff --git a/firmware/target/coldfire/iaudio/m3/backlight-m3.c b/firmware/target/coldfire/iaudio/m3/backlight-m3.c
index 0b4ee51275..1163d6acb7 100644
--- a/firmware/target/coldfire/iaudio/m3/backlight-m3.c
+++ b/firmware/target/coldfire/iaudio/m3/backlight-m3.c
@@ -25,7 +25,7 @@
 #include "backlight.h"
 #include "backlight-target.h"
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    and_l(~0x00000008, &GPIO1_OUT);
    or_l(0x00000008, &GPIO1_ENABLE);
@@ -33,12 +33,12 @@ bool _backlight_init(void)
    return true; /* Backlight always ON after boot. */
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    and_l(~0x00000008, &GPIO1_OUT);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    or_l(0x00000008, &GPIO1_OUT);
 }
diff --git a/firmware/target/coldfire/iaudio/m3/backlight-target.h b/firmware/target/coldfire/iaudio/m3/backlight-target.h
index 7c3ba979a3..fdc8438ea7 100644
--- a/firmware/target/coldfire/iaudio/m3/backlight-target.h
+++ b/firmware/target/coldfire/iaudio/m3/backlight-target.h
@@ -22,8 +22,8 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
 #endif
diff --git a/firmware/target/coldfire/iaudio/m5/backlight-m5.c b/firmware/target/coldfire/iaudio/m5/backlight-m5.c
index daa613810e..2738a327c9 100644
--- a/firmware/target/coldfire/iaudio/m5/backlight-m5.c
+++ b/firmware/target/coldfire/iaudio/m5/backlight-m5.c
@@ -26,14 +26,14 @@
 #include "pcf50606.h"
 #include "lcd.h"
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
-    _backlight_on();
+    backlight_hw_on();
    return true; /* Backlight always ON after boot. */
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    int level = disable_irq_save();
@@ -41,7 +41,7 @@ void _backlight_on(void)
    restore_irq(level);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    int level = disable_irq_save();
@@ -49,12 +49,12 @@ void _backlight_off(void)
    restore_irq(level);
 }
-void _remote_backlight_on(void)
+void remote_backlight_hw_on(void)
 {
    and_l(~0x00200000, &GPIO_OUT);
 }
-void _remote_backlight_off(void)
+void remote_backlight_hw_off(void)
 {
    or_l(0x00200000, &GPIO_OUT);
 }
diff --git a/firmware/target/coldfire/iaudio/m5/backlight-target.h b/firmware/target/coldfire/iaudio/m5/backlight-target.h
index 43e8a2cbe2..38acdd0e5f 100644
--- a/firmware/target/coldfire/iaudio/m5/backlight-target.h
+++ b/firmware/target/coldfire/iaudio/m5/backlight-target.h
@@ -21,10 +21,10 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _remote_backlight_on(void);
+void remote_backlight_hw_on(void);
-void _remote_backlight_off(void);
+void remote_backlight_hw_off(void);
 #endif
diff --git a/firmware/target/coldfire/iaudio/x5/backlight-target.h b/firmware/target/coldfire/iaudio/x5/backlight-target.h
index 2b5281c23e..1d9bee0545 100644
--- a/firmware/target/coldfire/iaudio/x5/backlight-target.h
+++ b/firmware/target/coldfire/iaudio/x5/backlight-target.h
@@ -21,11 +21,11 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int val);
+void backlight_hw_brightness(int val);
-void _remote_backlight_on(void);
+void remote_backlight_hw_on(void);
-void _remote_backlight_off(void);
+void remote_backlight_hw_off(void);
 #endif
diff --git a/firmware/target/coldfire/iaudio/x5/backlight-x5.c b/firmware/target/coldfire/iaudio/x5/backlight-x5.c
index 8a06c7d653..de8b3d8e14 100644
--- a/firmware/target/coldfire/iaudio/x5/backlight-x5.c
+++ b/firmware/target/coldfire/iaudio/x5/backlight-x5.c
@@ -26,15 +26,15 @@
 #include "pcf50606.h"
 #include "lcd.h"
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
-    _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
+    backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
-    _backlight_on();
+    backlight_hw_on();
    
    return true; /* Backlight always ON after boot. */
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    int level;
 #ifdef HAVE_LCD_ENABLE
@@ -45,7 +45,7 @@ void _backlight_on(void)
    restore_irq(level);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    int level = disable_irq_save();
    pcf50606_write(0x38, 0x80); /* Backlight OFF, GPO1INV=1, GPO1ACT=000 */
@@ -56,7 +56,7 @@ void _backlight_off(void)
 }
 /* set brightness by changing the PWM */
-void _backlight_set_brightness(int val)
+void backlight_hw_brightness(int val)
 {
    /* disable IRQs while bitbanging */
    int old_irq_level = disable_irq_save();
@@ -65,12 +65,12 @@ void _backlight_set_brightness(int val)
    restore_irq(old_irq_level);
 }
-void _remote_backlight_on(void)
+void remote_backlight_hw_on(void)
 {
    and_l(~0x00200000, &GPIO_OUT);
 }
-void _remote_backlight_off(void)
+void remote_backlight_hw_off(void)
 {
    or_l(0x00200000, &GPIO_OUT);
 }
diff --git a/firmware/target/coldfire/iriver/h100/backlight-h100.c b/firmware/target/coldfire/iriver/h100/backlight-h100.c
index 47c02cb351..1f582ec8df 100644
--- a/firmware/target/coldfire/iriver/h100/backlight-h100.c
+++ b/firmware/target/coldfire/iriver/h100/backlight-h100.c
@@ -27,7 +27,7 @@
 #include "lcd.h"
 /* Returns the current state of the backlight (true=ON, false=OFF). */
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    or_l(0x00020000, &GPIO1_ENABLE);
    or_l(0x00020000, &GPIO1_FUNCTION);
@@ -45,12 +45,12 @@ void _backlight_hw_off(void)
    or_l(0x00020000, &GPIO1_OUT);
 }
-void _remote_backlight_on(void)
+void remote_backlight_hw_on(void)
 {
    and_l(~0x00000800, &GPIO_OUT);
 }
-void _remote_backlight_off(void)
+void remote_backlight_hw_off(void)
 {
    or_l(0x00000800, &GPIO_OUT);
 }
diff --git a/firmware/target/coldfire/iriver/h100/backlight-target.h b/firmware/target/coldfire/iriver/h100/backlight-target.h
index 5cd6fa7133..64d0353ab0 100644
--- a/firmware/target/coldfire/iriver/h100/backlight-target.h
+++ b/firmware/target/coldfire/iriver/h100/backlight-target.h
@@ -21,22 +21,19 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void); /* Returns backlight current state (true=ON). */
+bool backlight_hw_init(void); /* Returns backlight current state (true=ON). */
-void _backlight_hw_on(void);
+void backlight_hw_on(void);
-void _backlight_hw_off(void);
+void backlight_hw_off(void);
-#ifdef BOOTLOADER
+#ifndef BOOTLOADER
-#define _backlight_on() _backlight_hw_on()
+#define backlight_hw_on_isr() backlight_hw_on()
-#define _backlight_off() _backlight_hw_off()
+#define backlight_hw_off_isr() backlight_hw_off()
-#else
+#define backlight_hw_on_normal() backlight_hw_on()
-#define _backlight_on_isr() _backlight_hw_on()
+#define backlight_hw_off_normal() backlight_hw_off()
-#define _backlight_off_isr() _backlight_hw_off()
-#define _backlight_on_normal() _backlight_hw_on()
-#define _backlight_off_normal() _backlight_hw_off()
 #define _BACKLIGHT_FADE_BOOST
 #endif
-void _remote_backlight_on(void);
+void remote_backlight_hw_on(void);
-void _remote_backlight_off(void);
+void remote_backlight_hw_off(void);
 #endif
diff --git a/firmware/target/coldfire/iriver/h300/backlight-h300.c b/firmware/target/coldfire/iriver/h300/backlight-h300.c
index 64e09b9b40..9e44dfa80e 100644
--- a/firmware/target/coldfire/iriver/h300/backlight-h300.c
+++ b/firmware/target/coldfire/iriver/h300/backlight-h300.c
@@ -28,7 +28,7 @@
 #include "pcf50606.h"
 #include "lcd.h"
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    or_l(0x00020000, &GPIO1_ENABLE);
    or_l(0x00020000, &GPIO1_FUNCTION);
@@ -37,21 +37,21 @@ bool _backlight_init(void)
    return true; /* Backlight always ON after boot. */
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    lcd_enable(true);
    sleep(HZ/100); /* lcd needs time - avoid flashing for dark screens */
    or_l(0x00020000, &GPIO1_OUT);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    and_l(~0x00020000, &GPIO1_OUT);
    lcd_enable(false);
 }
 /* set brightness by changing the PWM */
-void _backlight_set_brightness(int val)
+void backlight_hw_brightness(int val)
 {
    /* disable IRQs while bitbanging */
    int old_irq_level = disable_irq_save();
@@ -60,12 +60,12 @@ void _backlight_set_brightness(int val)
    restore_irq(old_irq_level);
 }
-void _remote_backlight_on(void)
+void remote_backlight_hw_on(void)
 {
    and_l(~0x00000002, &GPIO1_OUT);
 }
-void _remote_backlight_off(void)
+void remote_backlight_hw_off(void)
 {
    or_l(0x00000002, &GPIO1_OUT);
 }
diff --git a/firmware/target/coldfire/iriver/h300/backlight-target.h b/firmware/target/coldfire/iriver/h300/backlight-target.h
index 046a8fba8b..1ea9087a7b 100644
--- a/firmware/target/coldfire/iriver/h300/backlight-target.h
+++ b/firmware/target/coldfire/iriver/h300/backlight-target.h
@@ -21,11 +21,11 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void); /* Returns backlight current state (true=ON). */
+bool backlight_hw_init(void); /* Returns backlight current state (true=ON). */
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int val);
+void backlight_hw_brightness(int val);
-void _remote_backlight_on(void);
+void remote_backlight_hw_on(void);
-void _remote_backlight_off(void);
+void remote_backlight_hw_off(void);
 #endif
diff --git a/firmware/target/coldfire/mpio/backlight-mpio.c b/firmware/target/coldfire/mpio/backlight-mpio.c
index 1e40e9bb88..e04fa6d7dc 100644
--- a/firmware/target/coldfire/mpio/backlight-mpio.c
+++ b/firmware/target/coldfire/mpio/backlight-mpio.c
@@ -27,11 +27,11 @@
 #include "backlight-target.h"
 #include "lcd.h"
-static bool _backlight_on = true;
+static bool backlight_hw_on = true;
 static int _brightness = DEFAULT_BRIGHTNESS_SETTING;
 /* Returns the current state of the backlight (true=ON, false=OFF). */
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
 #ifdef BOOTLOADER
    and_l(~(1<<28),&GPIO_OUT);
@@ -44,12 +44,12 @@ bool _backlight_init(void)
 void _backlight_hw_on(void)
 {
 #ifndef BOOTLOADER
-    if (_backlight_on)
+    if (backlight_hw_on)
        return;
 #endif
   
-    _backlight_set_brightness(_brightness);
+    backlight_hw_brightness(_brightness);
-    _backlight_on = true;
+    backlight_hw_on = true;
 }
@@ -57,15 +57,15 @@ void _backlight_hw_off(void)
 {
    /* GPIO28 low */
    and_l(~(1<<28),&GPIO_OUT);
-    _backlight_on = false;
+    backlight_hw_on = false;
 }
-void _backlight_set_brightness(int val)
+void backlight_hw_brightness(int val)
 {
    unsigned char i;
 #ifndef BOOTLOADER
-    if( _brightness == val && _backlight_on == true )
+    if( _brightness == val && backlight_hw_on == true )
        return;
 #endif
@@ -83,12 +83,12 @@ void _backlight_set_brightness(int val)
    _brightness = val;
 }
-void _remote_backlight_on(void)
+void remote_backlight_hw_on(void)
 {
    /* I don't have remote to play with */
 }
-void _remote_backlight_off(void)
+void remote_backlight_hw_off(void)
 {
    /* I don't have remote to play with */
 }
diff --git a/firmware/target/coldfire/mpio/backlight-target.h b/firmware/target/coldfire/mpio/backlight-target.h
index 93b1f309fb..b73bf27c89 100644
--- a/firmware/target/coldfire/mpio/backlight-target.h
+++ b/firmware/target/coldfire/mpio/backlight-target.h
@@ -21,15 +21,13 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void); /* Returns backlight current state (true=ON). */
+bool backlight_hw_init(void); /* Returns backlight current state (true=ON). */
-void _backlight_hw_on(void);
+void backlight_hw_on(void);
-void _backlight_hw_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int val);
+void backlight_hw_brightness(int val);
-#define _backlight_on() _backlight_hw_on()
+#define backlight_hw_on_isr() backlight_hw_on()
-#define _backlight_off() _backlight_hw_off()
+#define backlight_hw_off_isr() backlight_hw_off()
-#define _backlight_on_isr() _backlight_hw_on()
+#define backlight_hw_on_normal() backlight_hw_on()
-#define _backlight_off_isr() _backlight_hw_off()
+#define backlight_hw_off_normal() backlight_hw_off()
-#define _backlight_on_normal() _backlight_hw_on()
-#define _backlight_off_normal() _backlight_hw_off()
 #endif
diff --git a/firmware/target/coldfire/mpio/hd300/button-hd300.c b/firmware/target/coldfire/mpio/hd300/button-hd300.c
index fda26dd0df..e84b8d442b 100644
--- a/firmware/target/coldfire/mpio/hd300/button-hd300.c
+++ b/firmware/target/coldfire/mpio/hd300/button-hd300.c
@@ -80,7 +80,7 @@ void scrollstrip_isr(void)
    static signed char prev_scroll_lines = -1;
    static signed char direction = 0;
    static unsigned char count = 0;
-    static long next_backlight_on = 0;
+    static long nextbacklight_hw_on = 0;
    signed int new_scroll_lines;
    signed int scroll_dir;
@@ -120,11 +120,11 @@ void scrollstrip_isr(void)
    }
    /* poke backlight */
-    if (TIME_AFTER(current_tick, next_backlight_on))
+    if (TIME_AFTER(current_tick, nextbacklight_hw_on))
    {
        backlight_on();
        reset_poweroff_timer();
-        next_backlight_on = current_tick + HZ/4;
+        nextbacklight_hw_on = current_tick + HZ/4;
    }
    /* apply sensitivity filter */
diff --git a/firmware/target/hosted/android/dx50/backlight-dx50.c b/firmware/target/hosted/android/dx50/backlight-dx50.c
index 98dbcb8abe..8eb4c58191 100644
--- a/firmware/target/hosted/android/dx50/backlight-dx50.c
+++ b/firmware/target/hosted/android/dx50/backlight-dx50.c
@@ -27,13 +27,13 @@
 #include <stdio.h>
 #include "unistd.h"
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* We have nothing to do */
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    FILE *f = fopen("/sys/power/state", "w");
    fputs("on", f);
@@ -41,7 +41,7 @@ void _backlight_on(void)
    lcd_enable(true);
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    FILE * f;
@@ -62,7 +62,7 @@ void _backlight_off(void)
 }
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    /* Just another check... */
    if (brightness > MAX_BRIGHTNESS_SETTING)
diff --git a/firmware/target/hosted/android/dx50/backlight-target.h b/firmware/target/hosted/android/dx50/backlight-target.h
index 67836aa790..0dc7ce387a 100644
--- a/firmware/target/hosted/android/dx50/backlight-target.h
+++ b/firmware/target/hosted/android/dx50/backlight-target.h
@@ -23,9 +23,9 @@
 #include <stdbool.h>
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/hosted/samsungypr/backlight-target.h b/firmware/target/hosted/samsungypr/backlight-target.h
index 21db75c8c9..138c2ccd3c 100644
--- a/firmware/target/hosted/samsungypr/backlight-target.h
+++ b/firmware/target/hosted/samsungypr/backlight-target.h
@@ -21,9 +21,9 @@
 #ifndef BACKLIGHT_TARGET_H
 #define BACKLIGHT_TARGET_H
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/hosted/samsungypr/ypr0/backlight-ypr0.c b/firmware/target/hosted/samsungypr/ypr0/backlight-ypr0.c
index 5555b30473..353ab15c48 100644
--- a/firmware/target/hosted/samsungypr/ypr0/backlight-ypr0.c
+++ b/firmware/target/hosted/samsungypr/ypr0/backlight-ypr0.c
@@ -29,13 +29,13 @@
 static bool backlight_on_status = true; /* Is on or off? */
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* We have nothing to do */
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    if (!backlight_on_status)
    {
@@ -51,7 +51,7 @@ void _backlight_on(void)
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    if (backlight_on_status)
    {
@@ -66,7 +66,7 @@ void _backlight_off(void)
    backlight_on_status = false;
 }
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    /* Just another check... */
    if (brightness > MAX_BRIGHTNESS_SETTING)
diff --git a/firmware/target/hosted/samsungypr/ypr1/backlight-ypr1.c b/firmware/target/hosted/samsungypr/ypr1/backlight-ypr1.c
index e4f0457cf9..7f9cc1e729 100644
--- a/firmware/target/hosted/samsungypr/ypr1/backlight-ypr1.c
+++ b/firmware/target/hosted/samsungypr/ypr1/backlight-ypr1.c
@@ -27,32 +27,32 @@
 static bool backlight_on_status = true; /* Is on or off? */
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    /* We have nothing to do */
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
    if (!backlight_on_status) {
-        _backlight_set_brightness(backlight_brightness);
+        backlight_hw_brightness(backlight_brightness);
    }
    backlight_on_status = true;
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
    if (backlight_on_status) {
-        _backlight_set_brightness(0);
+        backlight_hw_brightness(0);
    }
    backlight_on_status = false;
 }
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    /* Just another check... */
    if (brightness > MAX_BRIGHTNESS_SETTING) {
diff --git a/firmware/target/mips/ingenic_jz47xx/backlight-target.h b/firmware/target/mips/ingenic_jz47xx/backlight-target.h
index 67836aa790..0dc7ce387a 100644
--- a/firmware/target/mips/ingenic_jz47xx/backlight-target.h
+++ b/firmware/target/mips/ingenic_jz47xx/backlight-target.h
@@ -23,9 +23,9 @@
 #include <stdbool.h>
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c b/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c
index 7f834129b3..aacfe36f82 100644
--- a/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c
+++ b/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c
@@ -53,19 +53,19 @@ static void set_backlight(int val)
    old_val = val;
 }
-static void set_backlight_on(void)
+static void setbacklight_hw_on(void)
 {
    __tcu_start_counter(BACKLIGHT_PWM);
    __tcu_enable_pwm_output(BACKLIGHT_PWM);
 }
-static void set_backlight_off(void)
+static void setbacklight_hw_off(void)
 {
    __tcu_disable_pwm_output(BACKLIGHT_PWM);
    __tcu_stop_counter(BACKLIGHT_PWM);
 }
-bool _backlight_init(void)
+bool backlight_hw_init(void)
 {
    __gpio_as_pwm(BACKLIGHT_PWM);
    __tcu_start_timer_clock(BACKLIGHT_PWM);
@@ -88,24 +88,24 @@ bool _backlight_init(void)
    return true;
 }
-void _backlight_on(void)
+void backlight_hw_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(true); /* power on lcd */
 #endif
-    set_backlight_on();
+    setbacklight_hw_on();
 }
-void _backlight_off(void)
+void backlight_hw_off(void)
 {
-    set_backlight_off();
+    setbacklight_hw_off();
 #ifdef HAVE_LCD_ENABLE
    lcd_enable(false); /* power off lcd */
 #endif
 }
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
-void _backlight_set_brightness(int brightness)
+void backlight_hw_brightness(int brightness)
 {
    set_backlight(brightness);
 }
@@ -115,6 +115,6 @@ void _backlight_set_brightness(int brightness)
 /* Turn off LED supply */
 void _backlight_lcd_sleep(void)
 {
-    _backlight_off();
+    backlight_hw_off();
 }
 #endif
diff --git a/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c b/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c
index d06cb28f40..a810fde704 100644
--- a/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c
+++ b/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c
@@ -184,7 +184,7 @@ int button_read_device(int *data)
 #if CONFIG_ORIENTATION == SCREEN_LANDSCAPE
        *data = (*data & 0xFFFF) | ((LCD_HEIGHT - (*data >> 16)) << 16);
 #endif
-        if( UNLIKELY(!is_backlight_on(true)) )
+        if( UNLIKELY(!isbacklight_hw_on(true)) )
            *data = 0;
        old_data = *data;
diff --git a/firmware/target/mips/ingenic_jz47xx/onda_vx767/backlight-target.h b/firmware/target/mips/ingenic_jz47xx/onda_vx767/backlight-target.h
index 67836aa790..0dc7ce387a 100644
--- a/firmware/target/mips/ingenic_jz47xx/onda_vx767/backlight-target.h
+++ b/firmware/target/mips/ingenic_jz47xx/onda_vx767/backlight-target.h
@@ -23,9 +23,9 @@
 #include <stdbool.h>
-bool _backlight_init(void);
+bool backlight_hw_init(void);
-void _backlight_on(void);
+void backlight_hw_on(void);
-void _backlight_off(void);
+void backlight_hw_off(void);
-void _backlight_set_brightness(int brightness);
+void backlight_hw_brightness(int brightness);
 #endif /* BACKLIGHT_TARGET_H */
diff --git a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
index ab232baf65..5ef500a69b 100644
--- a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
@@ -272,7 +272,7 @@ void exception_handler(void* stack_ptr, unsigned int cause, unsigned int epc)
    lcd_set_viewport(NULL);
 #endif
    lcd_clear_display();
-    _backlight_on();
+    backlight_hw_on();
    lcd_puts(0, 0, parse_exception(cause));
    lcd_putsf(0, 1, "0x%08x at 0x%08x", read_c0_badvaddr(), epc);
diff --git a/firmware/target/sh/archos/fm_v2/backlight-target.h b/firmware/target/sh/archos/fm_v2/backlight-target.h
index 9eff09016a..c3dd395eca 100644
--- a/firmware/target/sh/archos/fm_v2/backlight-target.h
+++ b/firmware/target/sh/archos/fm_v2/backlight-target.h
@@ -24,15 +24,15 @@
 #include "config.h"
 #include "rtc.h"
-#define _backlight_init() true
+#define backlight_hw_init() true
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    rtc_write(0x13, 0x10); /* 32 kHz square wave */
    rtc_write(0x0a, rtc_read(0x0a) | 0x40); /* Enable square wave */
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    /* While on, backlight is flashing at 32 kHz.  If the square wave output
       is disabled while the backlight is lit, it will become constantly lit,
diff --git a/firmware/target/sh/archos/ondio/backlight-target.h b/firmware/target/sh/archos/ondio/backlight-target.h
index 9dd3eb1cf9..438c8c926a 100644
--- a/firmware/target/sh/archos/ondio/backlight-target.h
+++ b/firmware/target/sh/archos/ondio/backlight-target.h
@@ -27,7 +27,7 @@
 #ifdef HAVE_BACKLIGHT
 /* A stock Ondio has no backlight, it needs a hardware mod. */
-static inline bool _backlight_init(void)
+static inline bool backlight_hw_init(void)
 {
    PACR1 &= ~0x3000;    /* Set PA14 (backlight control) to GPIO */
    or_b(0x40, &PADRH); /* drive it high */
@@ -35,12 +35,12 @@ static inline bool _backlight_init(void)
    return true;
 }
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    or_b(0x40, &PADRH); /* drive it high */
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    and_b(~0x40, &PADRH); /* drive it low */
 }
diff --git a/firmware/target/sh/archos/ondio/power-ondio.c b/firmware/target/sh/archos/ondio/power-ondio.c
index 86026777fa..d7bbc08f4f 100644
--- a/firmware/target/sh/archos/ondio/power-ondio.c
+++ b/firmware/target/sh/archos/ondio/power-ondio.c
@@ -70,7 +70,7 @@ void power_off(void)
    disable_irq();
 #ifdef HAVE_BACKLIGHT
    /* Switch off the light on backlight-modded Ondios */
-    _backlight_off();
+    backlight_hw_off();
 #endif
    and_b(~0x20, &PBDRL);
    or_b(0x20, &PBIORL);
diff --git a/firmware/target/sh/archos/player/backlight-target.h b/firmware/target/sh/archos/player/backlight-target.h
index 71d6a935bc..b97d21a40f 100644
--- a/firmware/target/sh/archos/player/backlight-target.h
+++ b/firmware/target/sh/archos/player/backlight-target.h
@@ -24,7 +24,7 @@
 #include "config.h"
 #include "cpu.h"
-static inline bool _backlight_init(void)
+static inline bool backlight_hw_init(void)
 {
    PACR1 &= ~0x3000;    /* Set PA14 (backlight control) to GPIO */
    and_b(~0x40, &PADRH); /* drive and set low */
@@ -32,13 +32,13 @@ static inline bool _backlight_init(void)
    return true;
 }
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    and_b(~0x40, &PADRH); /* drive and set low */
    or_b(0x40, &PAIORH);
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    and_b(~0x40, &PAIORH); /* let it float (up) */
 }
diff --git a/firmware/target/sh/archos/recorder/backlight-target.h b/firmware/target/sh/archos/recorder/backlight-target.h
index 9eff09016a..c3dd395eca 100644
--- a/firmware/target/sh/archos/recorder/backlight-target.h
+++ b/firmware/target/sh/archos/recorder/backlight-target.h
@@ -24,15 +24,15 @@
 #include "config.h"
 #include "rtc.h"
-#define _backlight_init() true
+#define backlight_hw_init() true
-static inline void _backlight_on(void)
+static inline void backlight_hw_on(void)
 {
    rtc_write(0x13, 0x10); /* 32 kHz square wave */
    rtc_write(0x0a, rtc_read(0x0a) | 0x40); /* Enable square wave */
 }
-static inline void _backlight_off(void)
+static inline void backlight_hw_off(void)
 {
    /* While on, backlight is flashing at 32 kHz.  If the square wave output
       is disabled while the backlight is lit, it will become constantly lit,