linux-kernel - [PATCH 1/2] ARM: dts: imx6sl-tolino-shine2hd: Add backlight

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Date:   Wed, 19 Oct 2022 08:51:58 +0200
From:   Andreas Kemnade <andreas@...nade.info>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        j.neuschaefer@....net
Cc:     Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH 1/2] ARM: dts: imx6sl-tolino-shine2hd: Add backlight

Add backlight for Tolino Shine2 HD. It uses the PWM
of the embedded controller.

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 arch/arm/boot/dts/imx6sl-tolino-shine2hd.dts | 21 ++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/imx6sl-tolino-shine2hd.dts b/arch/arm/boot/dts/imx6sl-tolino-shine2hd.dts
index 663ee9df79e6..ea0ce59aa4f1 100644
--- a/arch/arm/boot/dts/imx6sl-tolino-shine2hd.dts
+++ b/arch/arm/boot/dts/imx6sl-tolino-shine2hd.dts
@@ -18,6 +18,21 @@ / {
 	model = "Tolino Shine 2 HD";
 	compatible = "kobo,tolino-shine2hd", "fsl,imx6sl";
 
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&ec 0 50000>;
+		power-supply = <&backlight_regulator>;
+	};
+
+	backlight_regulator: regulator-backlight {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_backlight_power>;
+		regulator-name = "backlight";
+		gpio = <&gpio2 10 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	chosen {
 		stdout-path = &uart1;
 	};
@@ -299,6 +314,12 @@ &iomuxc {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_hog>;
 
+	pinctrl_backlight_power: backlight-powergrp {
+		fsl,pins = <
+			MX6SL_PAD_EPDC_PWRCTRL3__GPIO2_IO10 0x10059
+		>;
+	};
+
 	pinctrl_gpio_keys: gpio-keysgrp {
 		fsl,pins = <
 			MX6SL_PAD_SD1_DAT1__GPIO5_IO08  0x17059
-- 
2.30.2