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

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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: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
This commit is contained in:
Peter Chubb
2015-05-14 09:57:56 +10:00
committed by Kukjin Kim
parent 81ce48162a
commit 719f39fec5
1 changed files with 36 additions and 14 deletions
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50
arch/arm/boot/dts/exynos5422-odroidxu3.dts
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@@ -285,25 +285,35 @@
};
};
leds {
compatible = "gpio-leds";
heartbeat {
label = "blue:heartbeart";
gpios = <&gpb2 2 0>;
default-state = "off";
linux,default-trigger = "heartbeat";
};
pwmleds {
compatible = "pwm-leds";
eMMC {
label = "green:eMMC";
gpios = <&gpb2 1 0>;
default-state = "off";
greenled {
label = "green:mmc0";
pwms = <&pwm 1 2000000 0>;
pwm-names = "pwm1";
/*
* Green LED is much brighter than the others
* so limit its max brightness
*/
max_brightness = <127>;
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";
gpios = <&gpx2 3 0>;
gpios = <&gpx2 3 GPIO_ACTIVE_HIGH>;
default-state = "off";
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 {
status = "okay";
clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;