From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexandre Courbot <acourbot@nvidia.com>
Subject: [PATCH v6 4/4] tegra: ventana: add pwm backlight DT nodes
Date: Wed, 12 Sep 2012 18:57:47 +0900
Message-ID: <1347443867-18868-5-git-send-email-acourbot@nvidia.com>
References: <1347443867-18868-1-git-send-email-acourbot@nvidia.com>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <1347443867-18868-1-git-send-email-acourbot@nvidia.com>
Sender: linux-kernel-owner@vger.kernel.org
To: Stephen Warren <swarren@nvidia.com>, Thierry Reding <thierry.reding@avionic-design.de>, Simon Glass <sjg@chromium.org>, Grant Likely <grant.likely@secretlab.ca>, Rob Herring <rob.herring@calxeda.com>, Mark Brown <broonie@opensource.wolfsonmicro.com>, Anton Vorontsov <cbou@mail.ru>, David Woodhouse <dwmw2@infradead.org>, Arnd Bergmann <arnd@arndb.de>
Cc: Leela Krishna Amudala <l.krishna@samsung.com>, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, linux-pm@vger.kernel.org, linux-doc@vger.kernel.org, Alexandre Courbot <acourbot@nvidia.com>
List-Id: devicetree@vger.kernel.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 3e5952f..4ca3ceb 100644
--- a/arch/arm/boot/dts/tegra20-ventana.dts
+++ b/arch/arm/boot/dts/tegra20-ventana.dts
@@ -469,6 +469,63 @@
 		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>;
@@ -512,7 +569,7 @@
 			enable-active-high;
 		};
 
-		regulator@4 {
+		vdd_bl_reg: regulator@4 {
 			compatible = "regulator-fixed";
 			reg = <4>;
 			regulator-name = "vdd_bl";
-- 
1.7.12