[PATCH 3/4] ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm

[Sebastian Andrzej Siewior]

From: Philip Avinash <avinashphilip@xxxxxx>

PWM output from ecap0 uses as backlight source. Also adds low threshold
value to have a uniform divisions in brightness-levels scales.

Signed-off-by: Philip Avinash <avinashphilip@xxxxxx>
Reviewed-by: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
 arch/arm/boot/dts/am335x-evm.dts |   23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index 0423298..35b2f77 100644
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -44,6 +44,12 @@
 				0x154 0x27	/* spi0_d0.gpio0_3, INPUT | MODE7 */
 			>;
 		};
+
+		ecap0_pins: backlight_pins {
+			pinctrl-single,pins = <
+				0x164 0x0	/* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
+			>;
+		};
 	};
 
 	ocp {
@@ -102,6 +108,16 @@
 				reg = <0x48>;
 			};
 		};
+
+		epwmss0: epwmss@48300000 {
+			status = "okay";
+
+			ecap0: ecap@48300100 {
+				status = "okay";
+				pinctrl-names = "default";
+				pinctrl-0 = <&ecap0_pins>;
+			};
+		};
 	};
 
 	vbat: fixedregulator@0 {
@@ -158,6 +174,13 @@
 			gpio-key,wakeup;
 		};
 	};
+
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&ecap0 0 50000 0>;
+		brightness-levels = <0 51 53 56 62 75 101 152 255>;
+		default-brightness-level = <8>;
+	};
 };
 
 /include/ "tps65910.dtsi"
-- 
1.7.10.4

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