Fuzev2: fix backlight brightness

PMU registers are write-only

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25377 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 9 insertions, 19 deletions

diff --git a/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c b/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c
index 87f3418288..7e21460fe8 100644
--- a/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c
+++ b/firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c
@@ -28,48 +28,38 @@
 
 int buttonlight_is_on = 0;
 
-static int brightness_internal = 0;
-
-/* not functional */
 void _backlight_set_brightness(int brightness)
 {
-    //ascodec_write(AS3514_DCDC15, brightness);
-    brightness_internal = brightness << 2;
-    brightness_internal += brightness + 5;
-    brightness_internal <<= 25;
-    brightness_internal >>= 24;
     ascodec_write(0x1c, 8|2); // sub register
-    ascodec_write(0x1b, brightness_internal|0xff);
+    ascodec_write(0x1b, brightness * 10);
 }
 
 bool _backlight_init(void)
 {
     GPIOB_DIR |= 1<<5; /* for buttonlight, stuff below seems to be needed
                           for buttonlight as well*/
+
     ascodec_write(0x1c, 8|1); // sub register
-    ascodec_write(0x1b, ascodec_read(0x1b)|0x80);
+    ascodec_write(0x1b, 0x80);
+
+    ascodec_write(0x1c, 8|2); // sub register
+    ascodec_write(0x1b, backlight_brightness * 10);
     return true;
 }
 
-/* not functional */
 void _backlight_on(void)
 {
 #ifdef HAVE_LCD_ENABLE
     lcd_enable(true); /* power on lcd + visible display */
 #endif
-#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 */
-    ascodec_write(0x1c, 8|2); // sub register
-    ascodec_write(0x1b, brightness_internal);
-#endif
+    ascodec_write(0x1c, 8|1); // sub register
+    ascodec_write(0x1b, 0x80);
 }
 
-/* not functional */
 void _backlight_off(void)
 {
     ascodec_write(0x1c, 8|1); // sub register
-    ascodec_write(0x1b, ascodec_read(0x1b) & ~0x80);
+    ascodec_write(0x1b, 0);
 #ifdef HAVE_LCD_ENABLE
     lcd_enable(false); /* power off visible display */
 #endif