ARM: mxs: Add backlight support for M28EVK

This patch adds backlight support for M28EVK.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/imx28-m28evk.dts b/arch/arm/boot/dts/imx28-m28evk.dts
index 44d9da57736e..0d322a2bebaf 100644
--- a/arch/arm/boot/dts/imx28-m28evk.dts
+++ b/arch/arm/boot/dts/imx28-m28evk.dts
@@ -235,6 +235,12 @@
                                 pinctrl-0 = <&auart2_2pins_b>;
                                 status = "okay";
                         };
+
+                        pwm: pwm@80064000 {
+                                pinctrl-names = "default";
+                                pinctrl-0 = <&pwm4_pins_a>;
+                                status = "okay";
+                        };
                 };
         };
 
@@ -270,6 +276,13 @@
                 };
         };
 
+        backlight {
+                compatible = "pwm-backlight";
+                pwms = <&pwm 4 5000000>;
+                brightness-levels = <0 4 8 16 32 64 128 255>;
+                default-brightness-level = <6>;
+        };
+
         regulators {
                 compatible = "simple-bus";