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/apalis-tk1/apalis-tk1.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/apalis-tk1/apalis-tk1.c')
| -rw-r--r-- | board/toradex/apalis-tk1/apalis-tk1.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/board/toradex/apalis-tk1/apalis-tk1.c b/board/toradex/apalis-tk1/apalis-tk1.c index a6a3897a75..92ce1a9592 100644 --- a/board/toradex/apalis-tk1/apalis-tk1.c +++ b/board/toradex/apalis-tk1/apalis-tk1.c @@ -281,3 +281,12 @@ void start_cpu_fan(void) gpio_request(FAN_EN, "FAN_EN"); gpio_direction_output(FAN_EN, 1); } + +/* + * Backlight off before OS handover + */ +void board_preboot_os(void) +{ + gpio_request(TEGRA_GPIO(BB, 5), "BL_ON"); + gpio_direction_output(TEGRA_GPIO(BB, 5), 0); +} |