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>

diff --git a/arch/arm/boot/dts/imx28-m28evk.dts b/arch/arm/boot/dts/imx28-m28evk.dts
index 44d9da5..0d322a2 100644 (file)
--- 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";