From 5717b9a050a123d3e1eafa7c0883810847e74d2c Mon Sep 17 00:00:00 2001 From: Gerard Salvatella Date: Fri, 31 Aug 2018 09:47:44 +0200 Subject: 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 Acked-by: Marcel Ziswiler --- board/toradex/colibri_imx7/colibri_imx7.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'board/toradex/colibri_imx7/colibri_imx7.c') diff --git a/board/toradex/colibri_imx7/colibri_imx7.c b/board/toradex/colibri_imx7/colibri_imx7.c index ca28f1cc5d..e9f81a53f5 100644 --- a/board/toradex/colibri_imx7/colibri_imx7.c +++ b/board/toradex/colibri_imx7/colibri_imx7.c @@ -188,6 +188,15 @@ static int setup_lcd(void) return 0; } + +/* + * Backlight off before OS handover + */ +void board_preboot_os(void) +{ + gpio_direction_output(GPIO_PWM_A, 1); + gpio_direction_output(GPIO_BL_ON, 0); +} #endif #ifdef CONFIG_FEC_MXC -- cgit v1.2.3