[PATCH 2/2] ARM: tegra: paz00: enable backlight

[Marc Dietrich]

This enables backlight using power sequences.

Signed-off-by: Marc Dietrich <marvi...@gmx.de>
---
 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 3f7f5a2..76cfa5c 100644
--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@@ -504,6 +504,10 @@
                        rgb {
                                status = "okay";
                                nvidia,ddc-i2c-bus = <&lvds_ddc>;
+
+                               display {
+                                       nvidia,backlight = <&backlight>;
+                               };
                        };
                };
 
@@ -535,4 +539,72 @@
                nvidia,hp-det-gpios = <&gpio 178 0>; /* gpio PW2 */
                nvidia,spkr-en-gpios = <&paz00 0 0>;
        };
+
+       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;
+                               };
+                       };
+               };
+       };
 };
-- 
1.7.9.5

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