ARM: dts: cm-t335: add support for PWM backlight

Add pinmux configuration for ECAP0 pin.
Add node for PWM backlight device.
Use PWM output from ecap0 as backlight source.

Signed-off-by: Ilya Ledvich <ilya@compulab.co.il>
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am335x-cm-t335.dts b/arch/arm/boot/dts/am335x-cm-t335.dts
index 3aec38a482db86aa0467166e1a2b039a3a96084b..31ff1aa07b4333d7507834c70a167461c433ac4c 100644 (file)
--- a/arch/arm/boot/dts/am335x-cm-t335.dts
+++ b/arch/arm/boot/dts/am335x-cm-t335.dts
@@ -39,6 +39,13 @@
                regulator-min-microvolt = <3300000>;
                regulator-max-microvolt = <3300000>;
        };
+
+       backlight {
+               compatible = "pwm-backlight";
+               pwms = <&ecap0 0 50000 0>;
+               brightness-levels = <0 51 53 56 62 75 101 152 255>;
+               default-brightness-level = <8>;
+       };
 };
 
 &am33xx_pinmux {
@@ -114,6 +121,13 @@
                >;
        };
 
+       ecap0_pins: pinmux_ecap0_pins {
+               pinctrl-single,pins = <
+                       /* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
+                       AM33XX_IOPAD(0x964, 0x0)
+               >;
+       };
+
        cpsw_default: cpsw_default {
                pinctrl-single,pins = <
                        /* Slave 1 */
@@ -223,6 +237,16 @@
        };
 };
 
+&epwmss0 {
+       status = "okay";
+
+       ecap0: ecap@48300100 {
+               status = "okay";
+               pinctrl-names = "default";
+               pinctrl-0 = <&ecap0_pins>;
+       };
+};
+
 &gpmc {
        status = "okay";
        pinctrl-names = "default";