diff options
| author | Gerard Salvatella <gerard.salvatella@toradex.com> | 2018-11-19 15:54:10 +0100 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2019-02-20 09:01:45 -0700 |
| commit | a3c9021771608f5b514c75874fa0d8fbee2873d6 (patch) | |
| tree | de9dd8d381fdcecc7c8be000b7edc8782febcad1 /board/toradex/colibri_vf | |
| parent | 146680003a776d9217d6d351ca4186f416a77226 (diff) | |
| download | u-boot-a3c9021771608f5b514c75874fa0d8fbee2873d6.tar.gz | |
board: toradex: turn off lcd backlight before OS handover
U-Boot typically tears down the display controller before handing
control over to Linux. On LCD displays disabling pixel clock leads to a
fading out effect with vertical/horizontal lines. Make sure to disable
back light before booting Linux.
Signed-off-by: Gerard Salvatella <gerard.salvatella@toradex.com>
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'board/toradex/colibri_vf')
| -rw-r--r-- | board/toradex/colibri_vf/colibri_vf.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/board/toradex/colibri_vf/colibri_vf.c b/board/toradex/colibri_vf/colibri_vf.c index 19cf748c5d..79f702f2bf 100644 --- a/board/toradex/colibri_vf/colibri_vf.c +++ b/board/toradex/colibri_vf/colibri_vf.c @@ -38,8 +38,9 @@ DECLARE_GLOBAL_DATA_PTR; #define ENET_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_HIGH | \ PAD_CTL_DSE_50ohm | PAD_CTL_OBE_IBE_ENABLE) -#define USB_PEN_GPIO 83 +#define USB_PEN_GPIO 83 #define USB_CDET_GPIO 102 +#define PTC0_GPIO_45 45 static struct ddrmc_cr_setting colibri_vf_cr_settings[] = { /* AXI */ @@ -632,3 +633,12 @@ int board_usb_phy_mode(int port) } } #endif + +/* + * Backlight off before OS handover + */ +void board_preboot_os(void) +{ + gpio_request(PTC0_GPIO_45, "BL_ON"); + gpio_direction_output(PTC0_GPIO_45, 0); +} |