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Commit 719f39fe authored by Peter Chubb's avatar Peter Chubb Committed by Kukjin Kim
Browse files

ARM: dts: exynos5422-odroidxu3: Hook up PWM and use it for LEDs 



PWM output wasn't working because it wasn't hooked up to its pincontrol.
This patch:
   - hooks up PWM to its pincontrol, and documents what
     the outputs are on the XU3
   - switches the LEDs that are on PWM outputs to use PWM
     rather than GPIO.

The main effect is that the brightness of the LEDs can be controlled, and
user-mode fan control is enabled via /sys/class/pwm

Acked-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: default avatarPeter Chubb <peter.chubb@nicta.com.au>
Signed-off-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene@kernel.org>
parent 81ce4816

arch/arm/boot/dts/exynos5422-odroidxu3.dts

+36 −14
Original line number Original line Diff line number Diff line
@@ -285,25 +285,35 @@ 
		};

		};

	};

	};





	leds {

	pwmleds {

		compatible = "gpio-leds";

		compatible = "pwm-leds";

		heartbeat {

			label = "blue:heartbeart";

			gpios = <&gpb2 2 0>;

			default-state = "off";

			linux,default-trigger = "heartbeat";

		};





		eMMC {

		greenled {

			label = "green:eMMC";

			label = "green:mmc0";

			gpios = <&gpb2 1 0>;

			pwms = <&pwm 1 2000000 0>;

			default-state = "off";

			pwm-names = "pwm1";

			/*

			 * Green LED is much brighter than the others

			 * so limit its max brightness

			 */

			max_brightness = <127>;

			linux,default-trigger = "mmc0";

			linux,default-trigger = "mmc0";

		};

		};





		microSD {

		blueled {

			label = "blue:heartbeat";

			pwms = <&pwm 2 2000000 0>;

			pwm-names = "pwm2";

			max_brightness = <255>;

			linux,default-trigger = "heartbeat";

		};

	};



	gpioleds {

		compatible = "gpio-leds";

		redled {

			label = "red:microSD";

			label = "red:microSD";

			gpios = <&gpx2 3 0>;

			gpios = <&gpx2 3 GPIO_ACTIVE_HIGH>;

			default-state = "off";

			default-state = "off";

			linux,default-trigger = "mmc1";

			linux,default-trigger = "mmc1";

		};

		};
@@ -472,6 +482,18 @@ 
	};

	};

};

};





&pwm {

	/*

	 * PWM 0 -- fan

	 * PWM 1 -- Green LED

	 * PWM 2 -- Blue LED

	 * PWM 3 -- on MIPI connector for backlight

	 */

	pinctrl-0 = <&pwm0_out &pwm1_out &pwm2_out &pwm3_out>;

	pinctrl-names = "default";

	status = "okay";

};



&rtc {

&rtc {

	status = "okay";

	status = "okay";

	clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;

	clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;