linux-kernel - [PATCH RFC 5/6] ARM: dts: qcom: msm8974-hammerhead: add support for backlight

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Date:   Sun,  5 May 2019 09:04:12 -0400
From:   Brian Masney <masneyb@...tation.org>
To:     robdclark@...il.com, sean@...rly.run,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, airlied@...ux.ie, daniel@...ll.ch,
        linux-kernel@...r.kernel.org, linus.walleij@...aro.org
Subject: [PATCH RFC 5/6] ARM: dts: qcom: msm8974-hammerhead: add support for backlight

Add necessary device tree nodes for the main LCD backlight.

Signed-off-by: Brian Masney <masneyb@...tation.org>
---
This requires this series that I submitted to the LED / backlight
subsystem:
https://lore.kernel.org/lkml/20190424092505.6578-1-masneyb@onstation.org/
It's received 3 {Reviewed,Acked}-Bys, and has no outstanding change
requests, so I expect it'll be merged soon.

 .../qcom-msm8974-lge-nexus5-hammerhead.dts    | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
index b3b04736a159..b7cf4b1019e9 100644
--- a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
@@ -289,6 +289,16 @@
 			};
 		};
 
+		i2c11_pins: i2c11 {
+			mux {
+				pins = "gpio83", "gpio84";
+				function = "blsp_i2c11";
+
+				drive-strength = <2>;
+				bias-disable;
+			};
+		};
+
 		i2c12_pins: i2c12 {
 			mux {
 				pins = "gpio87", "gpio88";
@@ -369,6 +379,30 @@
 		};
 	};
 
+	i2c@...67000 {
+		status = "ok";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c11_pins>;
+		clock-frequency = <355000>;
+		qcom,src-freq = <50000000>;
+
+		led-controller@38 {
+			compatible = "ti,lm3630a";
+			status = "ok";
+			reg = <0x38>;
+
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			led@0 {
+				reg = <0>;
+				led-sources = <0 1>;
+				label = "lcd-backlight";
+				default-brightness = <200>;
+			};
+		};
+	};
+
 	i2c@...68000 {
 		status = "ok";
 		pinctrl-names = "default";
-- 
2.20.1