H300/X5: Moved backlight brightness code to target tree. Created __backlight_set_brightness in backlight-(target).c. backlight_set_brightness range clamps and calls the backlight driver.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11488 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 10 insertions, 0 deletions

diff --git a/firmware/target/coldfire/iriver/h300/backlight-h300.c b/firmware/target/coldfire/iriver/h300/backlight-h300.c
index d5322c2cf7..50bd757612 100644
--- a/firmware/target/coldfire/iriver/h300/backlight-h300.c
+++ b/firmware/target/coldfire/iriver/h300/backlight-h300.c
@@ -38,6 +38,16 @@ void __backlight_off(void)
     lcd_enable(false);
 }
 
+/* set brightness by changing the PWM */
+void __backlight_set_brightness(int val)
+{
+    /* disable IRQs while bitbanging */
+    int old_irq_level = set_irq_level(HIGHEST_IRQ_LEVEL);
+    pcf50606_write(0x35, (val << 1) | 0x01); /* 512Hz, Enable PWM */
+    /* enable IRQs again */
+    set_irq_level(old_irq_level);
+}
+
 void __remote_backlight_on(void)
 {
     and_l(~0x00000002, &GPIO1_OUT);