From patchwork Sat Jan 25 23:35:59 2020
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X-Patchwork-Submitter: Anatolij Gustschin <agust@denx.de>
X-Patchwork-Id: 240112
List-Id: U-Boot discussion <u-boot.lists.denx.de>
From: agust at denx.de (Anatolij Gustschin)
Date: Sun, 26 Jan 2020 00:35:59 +0100
Subject: [PATCH] imx: mx6ul_14x14_evk: turn of backlight and LCD before
 booting OS
Message-ID: <20200125233559.27763-1-agust@denx.de>

This should help keeping the screen black when booting the kernel.

Signed-off-by: Anatolij Gustschin <agust at denx.de>
Reported-by: Fabio Estevam <festevam at gmail.com>
Tested-by: Fabio Estevam <festevam at gmail.com>
---
 board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c b/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c
index 086e0e6739..9cb5b14f13 100644
--- a/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c
+++ b/board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c
@@ -384,6 +384,15 @@ int checkboard(void)
 	return 0;
 }
 
+/*
+ * Backlight off and reset LCD before OS handover
+ */
+void board_preboot_os(void)
+{
+	gpio_set_value(IMX_GPIO_NR(1, 8), 0);
+	gpio_set_value(IMX_GPIO_NR(5, 9), 0);
+}
+
 #ifdef CONFIG_SPL_BUILD
 #include <linux/libfdt.h>
 #include <spl.h>