linux-kernel - [PATCH 1/2] arm64: dts: imx93-11x11-evk: Add PWM backlight for "LVDS" connector

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Message-Id: <20240827064717.2383292-2-victor.liu@nxp.com>
Date: Tue, 27 Aug 2024 14:47:16 +0800
From: Liu Ying <victor.liu@....com>
To: devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	catalin.marinas@....com,
	will@...nel.org,
	quic_bjorande@...cinc.com,
	geert+renesas@...der.be,
	dmitry.baryshkov@...aro.org,
	neil.armstrong@...aro.org,
	arnd@...db.de,
	nfraprado@...labora.com
Subject: [PATCH 1/2] arm64: dts: imx93-11x11-evk: Add PWM backlight for "LVDS" connector

J702 on i.MX93 11x11 EVK base board is a 40-pin connector labelled
"LVDS".  This connector supports PWM backlight with default 12V power
supply and ADP5585 PWM controller.  Add support for the backlight.

Signed-off-by: Liu Ying <victor.liu@....com>
---
This patch is based on next-20240826.

 .../boot/dts/freescale/imx93-11x11-evk.dts    | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
index 60eb64761392..8d036b3962e9 100644
--- a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
@@ -62,6 +62,15 @@ vdevbuffer: vdevbuffer@...20000 {
 
 	};
 
+	reg_vdd_12v: regulator-vdd-12v {
+		compatible = "regulator-fixed";
+		regulator-name = "VDD_12V";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		gpio = <&pcal6524 14 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	reg_vref_1v8: regulator-adc-vref {
 		compatible = "regulator-fixed";
 		regulator-name = "vref_1v8";
@@ -81,6 +90,17 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
 		enable-active-high;
 	};
 
+	backlight_lvds: backlight-lvds {
+		compatible = "pwm-backlight";
+		pwms = <&adp5585 0 100000 0>;
+		brightness-levels = <0 100>;
+		num-interpolated-steps = <100>;
+		default-brightness-level = <100>;
+		power-supply = <&reg_vdd_12v>;
+		enable-gpios = <&adp5585 9 GPIO_ACTIVE_HIGH>;
+		status = "disabled";
+	};
+
 	bt_sco_codec: bt-sco-codec {
 		compatible = "linux,bt-sco";
 		#sound-dai-cells = <1>;
@@ -302,6 +322,16 @@ ldo5: LDO5 {
 			};
 		};
 	};
+
+	adp5585: io-expander@34 {
+		compatible = "adi,adp5585-00", "adi,adp5585";
+		reg = <0x34>;
+		vdd-supply = <&buck4>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-reserved-ranges = <5 1>;
+		#pwm-cells = <3>;
+	};
 };
 
 &lpi2c3 {
-- 
2.34.1