@@ -317,6 +317,59 @@
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>;
+
+ pwms = <&pwm 2 5000000>;
+ pwm-names = "backlight";
+ power-supply = <&backlight_reg>;
+ enable-gpio = <&gpio 28 0>;
+
+ power-on-sequence {
+ regulator@0 {
+ id = "power";
+ enable;
+ post-delay = <10>;
+ };
+ pwm@1 {
+ id = "backlight";
+ enable;
+ };
+ gpio@2 {
+ id = "enable-gpio";
+ enable;
+ };
+ };
+ power-off-sequence {
+ gpio@0 {
+ id = "enable-gpio";
+ disable;
+ };
+ pwm@1 {
+ id = "backlight";
+ disable;
+ };
+ regulator@2 {
+ id = "power";
+ disable;
+ pre-delay = <10>;
+ };
+ };
+ };
+
+ backlight_reg: fixedregulator@176 {
+ compatible = "regulator-fixed";
+ regulator-name = "backlight_regulator";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ gpio = <&gpio 176 0>;
+ startup-delay-us = <0>;
+ enable-active-high;
+ regulator-boot-off;
+ };
+
sound {
compatible = "nvidia,tegra-audio-wm8903-ventana",
"nvidia,tegra-audio-wm8903";
@@ -123,7 +123,7 @@
status = "disabled";
};
- pwm {
+ pwm: pwm {
compatible = "nvidia,tegra20-pwm";
reg = <0x7000a000 0x100>;
#pwm-cells = <2>;
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> --- arch/arm/boot/dts/tegra20-ventana.dts | 53 +++++++++++++++++++++++++++++++++++ arch/arm/boot/dts/tegra20.dtsi | 2 +- 2 files changed, 54 insertions(+), 1 deletion(-)