diff options
author | Gerard Salvatella <gerard.salvatella@toradex.com> | 2018-08-31 09:47:44 +0200 |
---|---|---|
committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2018-09-13 14:06:50 +0200 |
commit | 5717b9a050a123d3e1eafa7c0883810847e74d2c (patch) | |
tree | 679d577c617588db0b29754a0a70619ec2dd895f /board/toradex/colibri_vf/colibri_vf.c | |
parent | 71c46c0c7531467a8387d3a686aef66397abd94c (diff) |
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>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Diffstat (limited to 'board/toradex/colibri_vf/colibri_vf.c')
-rw-r--r-- | board/toradex/colibri_vf/colibri_vf.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/board/toradex/colibri_vf/colibri_vf.c b/board/toradex/colibri_vf/colibri_vf.c index 02997e18a8..025eefc784 100644 --- a/board/toradex/colibri_vf/colibri_vf.c +++ b/board/toradex/colibri_vf/colibri_vf.c @@ -42,6 +42,7 @@ DECLARE_GLOBAL_DATA_PTR; #define USB_PEN_GPIO 83 #define USB_CDET_GPIO 102 +#define PTC0_GPIO_45 45 static struct ddrmc_cr_setting colibri_vf_cr_settings[] = { { DDRMC_CR79_CTLUPD_AREF(1), 79 }, @@ -650,3 +651,12 @@ 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); +} |