From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexandre Courbot <acourbot@nvidia.com>
Date: Fri, 19 Oct 2012 09:06:29 +0000
Subject: [PATCH v7 3/3] tegra: ventana: add PWM backlight to device tree
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To: Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>, Thierry Reding <thierry.reding-RM9K5IK7kjKj5M59NBduVrNAH6kLmebB@public.gmane.org>, Simon Glass <sjg-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>, Grant Likely <grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>, Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>, Mark Brown <broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>, Anton Vorontsov <cbou-JGs/UdohzUI@public.gmane.org>, David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>, Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: linux-fbdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Leela Krishna Amudala <l.krishna-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
 arch/arm/boot/dts/tegra20-ventana.dts | 59 ++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/tegra20-ventana.dts b/arch/arm/boot/dts/tegra20-ventana.dts
index bec8bb2..877a1bb 100644
--- a/arch/arm/boot/dts/tegra20-ventana.dts
+++ b/arch/arm/boot/dts/tegra20-ventana.dts
@@ -454,6 +454,63 @@
 		bus-width = <8>;
 	};
 
+	backlight {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 255>;
+		default-brightness-level = <12>;
+
+		/* resources used by the power sequences */
+		pwms = <&pwm 2 5000000>;
+		pwm-names = "backlight";
+		power-supply = <&vdd_bl_reg>;
+
+		power-sequences {
+			power-on {
+				step0 {
+					type = "regulator";
+					id = "power";
+					enable;
+				};
+				step1 {
+					type = "delay";
+					delay = <10000>;
+				};
+				step2 {
+					type = "pwm";
+					id = "backlight";
+					enable;
+				};
+				step3 {
+					type = "gpio";
+					gpio = <&gpio 28 0>;
+					value = <1>;
+				};
+			};
+
+			power-off {
+				step0 {
+					type = "gpio";
+					gpio = <&gpio 28 0>;
+					value = <0>;
+				};
+				step1 {
+					type = "pwm";
+					id = "backlight";
+					disable;
+				};
+				step2 {
+					type = "delay";
+					delay = <10000>;
+				};
+				step3 {
+					type = "regulator";
+					id = "power";
+					disable;
+				};
+			};
+		};
+	};
+
 	regulators {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -497,7 +554,7 @@
 			enable-active-high;
 		};
 
-		regulator@4 {
+		vdd_bl_reg: regulator@4 {
 			compatible = "regulator-fixed";
 			reg = <4>;
 			regulator-name = "vdd_bl";
-- 
1.7.12.3