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Fuzev2: fix backlight brightness

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PMU registers are write-only

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25377 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-03-29 12:10:43 +00:00
parent 05ace8e095
commit 60cfc1ddff
2 changed files with 11 additions and 21 deletions
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28
firmware/target/arm/as3525/sansa-fuzev2/backlight-fuzev2.c
View file

@ -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