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
prev 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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