ARM: dts: colibri-imx7: prepare for LVDS transceiver overlay

Add the pinmux group for LVDS transceiver related signals to use it
in an overlay.
Fix pinmux default values for these pins.

Enable the LVDS transceiver for NAND modules on a board
Iris v2.0A by default.

Related-to: ELB-3898
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>

1 files changed, 44 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/imx7d-colibri-iris-v2.dts b/arch/arm/boot/dts/imx7d-colibri-iris-v2.dts
index d30880d0953c..7ddae094529f 100644
--- a/arch/arm/boot/dts/imx7d-colibri-iris-v2.dts
+++ b/arch/arm/boot/dts/imx7d-colibri-iris-v2.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+ OR MIT
 /*
- * Copyright 2017-2020 Toradex
+ * Copyright 2017-2021 Toradex
  */
 
 /dts-v1/;
@@ -15,6 +15,49 @@
 		     "fsl,imx7d";
 };
 
+&gpio2 {
+	/*
+	 * This switches the LVDS transceiver to VESA color mapping mode.
+	 */
+	LVDS_COLOR_MAP {
+		gpio-hog;
+		gpios = <13 GPIO_ACTIVE_HIGH>; /* SODIMM 95 */
+		line-name = "LVDS_COLOR_MAP";
+		output-low;
+	};
+};
+
+&gpio7 {
+        /*
+	 * This switches the LVDS transceiver to the 24-bit RGB mode.
+	 */
+	LVDS_RGB_MODE {
+		gpio-hog;
+		gpios = <2 GPIO_ACTIVE_HIGH>; /* SODIMM 63 */
+		line-name = "LVDS_RGB_MODE";
+		output-low;
+	};
+
+	/*
+	 * This switches the LVDS transceiver to the single-channel
+	 * output mode.
+	 */
+	LVDS_CH_MODE {
+		gpio-hog;
+		gpios = <3 GPIO_ACTIVE_HIGH>; /* SODIMM 55 */
+		line-name = "LVDS_CH_MODE";
+		output-high;
+	};
+
+	/* This turns the LVDS transceiver on */
+	LVDS_POWER_ON {
+		gpio-hog;
+		gpios = <11 GPIO_ACTIVE_HIGH>; /* SODIMM 99 */
+		line-name = "LVDS_POWER_ON";
+		output-high;
+	};
+};
+
 &usbotg2 {
 	vbus-supply = <&reg_usbh_vbus>;
 	status = "okay";