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Subject[PATCH v6 4/4] tegra: ventana: add pwm backlight DT nodes
Date
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


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