From: Barnabás Czémán <barnabas.czeman@mainlining.org>
Date: Thu, 13 Feb 2025 19:54:49 +0000 (+0100)
Subject: arm64: dts: qcom: msm8917-xiaomi-riva: Add display backlight
X-Git-Tag: v6.16-rc1~97^2~20^2~115^2~62
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b74065e6c2482507435cdf7c4d0aab1830b9676;p=thirdparty%2Fkernel%2Fstable.git

arm64: dts: qcom: msm8917-xiaomi-riva: Add display backlight

Redmi 5A display uses pwm backlight, add support for it.

Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250213-pm8937-pwm-v2-3-49ea59801a33@mainlining.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
---

diff --git a/arch/arm64/boot/dts/qcom/msm8917-xiaomi-riva.dts b/arch/arm64/boot/dts/qcom/msm8917-xiaomi-riva.dts
index df135f9891a84..9db503e218886 100644
--- a/arch/arm64/boot/dts/qcom/msm8917-xiaomi-riva.dts
+++ b/arch/arm64/boot/dts/qcom/msm8917-xiaomi-riva.dts
@@ -20,6 +20,14 @@
 	qcom,msm-id = <QCOM_ID_MSM8917 0>;
 	qcom,board-id = <0x1000b 2>, <0x2000b 2>;
 
+	pwm_backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pm8937_pwm 0 100000>;
+		brightness-levels = <0 255>;
+		num-interpolated-steps = <255>;
+		default-brightness-level = <128>;
+	};
+
 	battery: battery {
 		compatible = "simple-battery";
 		charge-full-design-microamp-hours = <3000000>;
@@ -131,6 +139,23 @@
 	};
 };
 
+&pm8937_gpios {
+	pwm_enable_default: pwm-enable-default-state {
+		pins = "gpio8";
+		function = "dtest2";
+		output-low;
+		bias-disable;
+		qcom,drive-strength = <2>;
+	};
+};
+
+&pm8937_pwm {
+	pinctrl-0 = <&pwm_enable_default>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
 &pm8937_resin {
 	linux,code = <KEY_VOLUMEDOWN>;