[8/8] ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm

Commit Message

avinash philip Nov. 5, 2012, 9:12 a.m. UTC

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 <[e-mail]>
---
Second version
	- Combined with HWMOD changes & DT bindings.
	- No changes

:100644 100644 185d632... 9857050... M	arch/arm/boot/dts/am335x-evm.dts
 arch/arm/boot/dts/am335x-evm.dts |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)

Comments

Vaibhav Bedia Nov. 6, 2012, 6:46 a.m. UTC | #1

On Mon, Nov 05, 2012 at 14:42:29, Philip, Avinash wrote:
[...]

> +	am33xx_pinmux: pinmux@44e10800 {
> +		ecap0_pins: backlight_pins {
> +			pinctrl-single,pins = <
> +				0x164 0x0	/* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
> +			>;
> +		};
> +	};
> +
Ok I see the pinctrl entries here. Shouldn't this be done before
the change in the driver?

Regards.
Vaibhav

Patch

diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index 185d632..9857050 100644
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -18,6 +18,14 @@ 
 		reg = <0x80000000 0x10000000>; /* 256 MB */
 	};
 
+	am33xx_pinmux: pinmux@44e10800 {
+		ecap0_pins: backlight_pins {
+			pinctrl-single,pins = <
+				0x164 0x0	/* eCAP0_in_PWM0_out.eCAP0_in_PWM0_out MODE0 */
+			>;
+		};
+	};
+
 	ocp {
 		uart1: serial@44e09000 {
 			status = "okay";
@@ -31,6 +39,12 @@ 
 				reg = <0x2d>;
 			};
 		};
+
+		ecap0: ecap@48300100 {
+			status = "okay";
+			pinctrl-names = "default";
+			pinctrl-0 = <&ecap0_pins>;
+		};
 	};
 
 	vbat: fixedregulator@0 {
@@ -40,6 +54,13 @@ 
 		regulator-max-microvolt = <5000000>;
 		regulator-boot-on;
 	};
+
+	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"