diff options
| author | wdenk <wdenk> | 2005-03-14 13:14:58 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2005-03-14 13:14:58 +0000 |
| commit | a0bdf49e399e9e25e71081c5b3e73fc56c63a236 (patch) | |
| tree | 9267533169022c0629e259db22382d4471cf2edb /board | |
| parent | e9684a536a6769475b0b8cbac8b443e9acba9d60 (diff) | |
| download | u-boot-imx-a0bdf49e399e9e25e71081c5b3e73fc56c63a236.zip u-boot-imx-a0bdf49e399e9e25e71081c5b3e73fc56c63a236.tar.gz u-boot-imx-a0bdf49e399e9e25e71081c5b3e73fc56c63a236.tar.bz2 | |
INKA4x0: Allow initialization of LCD backlight dimming from
"brightness" environment variable.
Diffstat (limited to 'board')
| -rw-r--r-- | board/inka4x0/inka4x0.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/board/inka4x0/inka4x0.c b/board/inka4x0/inka4x0.c index f5e32cc..c17b8fe 100644 --- a/board/inka4x0/inka4x0.c +++ b/board/inka4x0/inka4x0.c @@ -177,6 +177,16 @@ void flash_preinit(void) int misc_init_f (void) { + uchar tmp[10]; + int i, br; + + i = getenv_r("brightness", tmp, sizeof(tmp)); + br = (i > 0) + ? (int) simple_strtoul (tmp, NULL, 10) + : CFG_BRIGHTNESS; + if (br > 255) + br = 255; + /* Initialize GPIO output pins. */ /* Configure GPT as GPIO output */ @@ -187,6 +197,11 @@ int misc_init_f (void) *(vu_long *)MPC5XXX_GPT4_ENABLE = *(vu_long *)MPC5XXX_GPT5_ENABLE = 0x24; + /* Configure GPT7 as PWM timer, 1kHz, no ints. */ + *(vu_long *)MPC5XXX_GPT7_ENABLE = 0;/* Disable */ + *(vu_long *)MPC5XXX_GPT7_COUNTER = 0x020000fe; + *(vu_long *)MPC5XXX_GPT7_PWMCFG = (br << 16); + *(vu_long *)MPC5XXX_GPT7_ENABLE = 0x3;/* Enable PWM mode and start */ /* Configure PSC3_6,7 as GPIO output */ *(vu_long *)MPC5XXX_GPIO_ENABLE |= 0x00003000; |