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From: Alexandre Courbot <acourbot@nvidia.com>
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 <leelakrishna.a@gmail.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>
Subject: [PATCH v5 4/4] tegra: ventana: add pwm backlight DT nodes
Date: Fri, 31 Aug 2012 20:34:06 +0900	[thread overview]
Message-ID: <1346412846-17102-5-git-send-email-acourbot@nvidia.com> (raw)
In-Reply-To: <1346412846-17102-1-git-send-email-acourbot@nvidia.com>

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 4ec6b4c..025928d 100644
--- a/arch/arm/boot/dts/tegra20-ventana.dts
+++ b/arch/arm/boot/dts/tegra20-ventana.dts
@@ -467,6 +467,63 @@
 		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_us = <10000>;
+				};
+				step2 {
+					type = "pwm";
+					id = "backlight";
+					enable;
+				};
+				step3 {
+					type = "gpio";
+					number = <&gpio 28 0>;
+					enable;
+				};
+			};
+
+			power-off {
+				step0 {
+					type = "gpio";
+					number = <&gpio 28 0>;
+					disable;
+				};
+				step1 {
+					type = "pwm";
+					id = "backlight";
+					disable;
+				};
+				step2 {
+					type = "delay";
+					delay_us = <10000>;
+				};
+				step3 {
+					type = "regulator";
+					id = "power";
+					disable;
+				};
+			};
+		};
+	};
+
 	regulators {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -510,7 +567,7 @@
 			enable-active-high;
 		};
 
-		regulator@4 {
+		vdd_bl_reg: regulator@4 {
 			compatible = "regulator-fixed";
 			reg = <4>;
 			regulator-name = "vdd_bl";
-- 
1.7.12


      parent reply	other threads:[~2012-08-31 11:33 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-31 11:34 [PATCH v5 0/4] Runtime Interpreted Power Sequences Alexandre Courbot
2012-08-31 11:34 ` [PATCH v5 1/4] " Alexandre Courbot
2012-09-05 17:19   ` Stephen Warren
2012-09-07  8:21     ` Alex Courbot
2012-09-06 14:14   ` Heiko Stübner
2012-09-07  8:04     ` Alex Courbot
2012-09-07  8:15       ` Mark Brown
2012-09-07  9:08       ` Heiko Stübner
2012-09-07 16:36         ` Stephen Warren
2012-08-31 11:34 ` [PATCH v5 2/4] pwm_backlight: use power sequences Alexandre Courbot
2012-09-05 17:25   ` Stephen Warren
2012-09-07  8:28     ` Alex Courbot
2012-09-07  8:29       ` Mark Brown
2012-09-07  8:34         ` Alex Courbot
2012-08-31 11:34 ` [PATCH v5 3/4] tegra: dt: add label to tegra20's PWM Alexandre Courbot
2012-08-31 11:34 ` Alexandre Courbot [this message]

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