linux-kernel - [PATCH v2 1/2] arm: dts: imx6qdl-vicut1.dtsi: Add backlight-isb node

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Date:   Tue, 26 Jul 2022 14:32:21 +0200
From:   David Jander <david@...tonic.nl>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, David Jander <david@...tonic.nl>
Subject: [PATCH v2 1/2] arm: dts: imx6qdl-vicut1.dtsi: Add backlight-isb node

On some older hardware models this is needed. It will do no harm if used
with newer models though.

Signed-off-by: David Jander <david@...tonic.nl>
---
v2:
 - Fix node name to use minus character instead of underscore.
---
 arch/arm/boot/dts/imx6qdl-vicut1.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm/boot/dts/imx6qdl-vicut1.dtsi b/arch/arm/boot/dts/imx6qdl-vicut1.dtsi
index a1676b5d2980..8a2512f3f378 100644
--- a/arch/arm/boot/dts/imx6qdl-vicut1.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-vicut1.dtsi
@@ -37,6 +37,16 @@ backlight_led: backlight_led {
 		power-supply = <&reg_3v3>;
 	};
 
+	/* only for backwards compatibility with old HW */
+	backlight_isb: backlight-isb {
+		compatible = "pwm-backlight";
+		pwms = <&pwm2 0 5000000 0>;
+		brightness-levels = <0 8 48 255>;
+		num-interpolated-steps = <5>;
+		default-brightness-level = <0>;
+		power-supply = <&reg_3v3>;
+	};
+
 	connector {
 		compatible = "composite-video-connector";
 		label = "Composite0";
@@ -370,6 +380,12 @@ &pwm1 {
 	status = "okay";
 };
 
+&pwm2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm2>;
+	status = "okay";
+};
+
 &pwm3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pwm3>;
@@ -601,6 +617,12 @@ MX6QDL_PAD_DISP0_DAT8__PWM1_OUT			0x1b0b0
 		>;
 	};
 
+	pinctrl_pwm2: pwm2grp {
+		fsl,pins = <
+			MX6QDL_PAD_DISP0_DAT9__PWM2_OUT			0x1b0b0
+		>;
+	};
+
 	pinctrl_pwm3: pwm3grp {
 		fsl,pins = <
 			MX6QDL_PAD_SD4_DAT1__PWM3_OUT			0x1b0b0
-- 
2.32.0