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arm64: dts: allwinner: add backlight regulator for Pinebook

PATCH New Vasily Khoruzhick 2 participants 2 messages Oct 9, 2018

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Device tree bindings Arm/Allwinner sunXi SoC support
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Vasily Khoruzhick

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PATCH 1/1 arm64: dts: allwinner: add backlight regulator for Pinebook

Backlight power is controlled by PH6 GPIO, so add corresponding regulator-fixed node for it. Otherwise backlight won't light up if bootloader doesn't enable it.

Signed-off-by Vasily Khoruzhick <[email protected]>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)
arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts +10 -0
index 897e60cbe38d..e2e426334cfe 100644
@@ -22,12 +22,22 @@
 		ethernet0 = &rtl8723cs;
 	};
 
+	vdd_bl: regulator at 0 {
+		compatible = "regulator-fixed";
+		regulator-name = "bl-3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
+		enable-active-high;
+	};
+
 	backlight: backlight {
 		compatible = "pwm-backlight";
 		pwms = <&pwm 0 50000 0>;
 		brightness-levels = <0 5 10 15 20 30 40 55 70 85 100>;
 		default-brightness-level = <2>;
 		enable-gpios = <&pio 3 23 GPIO_ACTIVE_HIGH>; /* PD23 */
+		power-supply = <&vdd_bl>;
 	};
 
 	chosen {
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2.19.0
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#1 lore raw

PATCH 1/1 arm64: dts: allwinner: add backlight regulator for Pinebook

Quoted 5 lines · Vasily Khoruzhick

Backlight power is controlled by PH6 GPIO, so add corresponding regulator-fixed node for it. Otherwise backlight won't light up if bootloader doesn't enable it.

Signed-off-by Vasily Khoruzhick <[email protected]>

Queued for 4.21, thanks!
Maxime

Signature · 10 lines
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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