[PATCH v4 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 8a14e1d..7349aa3 100644
--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@@ -15,6 +15,10 @@
                        rgb {
                                status = "okay";
                                nvidia,ddc-i2c-bus = <&lvds_ddc>;
+
+                               display {
+                                       nvidia,backlight = <&backlight>;
+                               };
                        };
                };
        };
@@ -461,6 +465,74 @@
                };
        };
 
+       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

--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html