This enables backlight using power sequences.
Signed-off-by: Marc Dietrich <marvin24@xxxxxx>
---
arch/arm/boot/dts/tegra20-paz00.dts | 72 +++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
diff --git a/arch/arm/boot/dts/tegra20-paz00.dts b/arch/arm/boot/dts/tegra20-paz00.dts
index 6cc6215..57c740a 100644
--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@@ -19,6 +19,10 @@
rgb {
status = "okay";
nvidia,ddc-i2c-bus = <&lvds_ddc>;
+
+ display {
+ nvidia,backlight = <&backlight>;
+ };
};
};
};
@@ -493,6 +497,74 @@
};
};
+ backlight: 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 0 5000000>;
+ pwm-names = "backlight";
+
+ power-sequences {
+ power-on {
+ step0 {
+ type = "pwm";
+ id = "backlight";
+ enable;
+ };
+ step1 {
+ type = "gpio";
+ gpio = <&gpio 4 0>; /* gpio PA4, en_vdd_pnl */
+ value = <1>;
+ };
+ step2 {
+ type = "gpio";
+ gpio = <&gpio 176 0>; /* gpio PW0, bl_vdd */
+ value = <1>;
+ };
+ step3 {
+ type = "gpio";
+ gpio = <&gpio 102 0>; /* gpio PM6, lvds_shdn */
+ value = <1>;
+ };
+ step4 {
+ type = "gpio";
+ gpio = <&gpio 164 0>; /* gpio PU4, bl_enb */
+ value = <1>;
+ };
+ };
+
+ power-off {
+ step4 {
+ type = "gpio";
+ gpio = <&gpio 164 0>; /* gpio PU4, bl_enb */
+ value = <0>;
+ };
+ step0 {
+ type = "gpio";
+ gpio = <&gpio 102 0>; /* gpio PM6, lvds_shdn */
+ value = <0>;
+ };
+ step1 {
+ type = "gpio";
+ gpio = <&gpio 176 0>; /* gpio PW0, bl_vdd */
+ value = <0>;
+ };
+ step2 {
+ type = "gpio";
+ gpio = <&gpio 4 0>; /* gpio PA4, en_vdd_pnl */
+ value = <0>;
+ };
+ step3 {
+ type = "pwm";
+ id = "backlight";
+ disable;
+ };
+ };
+ };
+ };
+
regulators {
compatible = "simple-bus";
#address-cells = <1>;
--
1.7.9.5
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