diff options
| author | Peter Chubb <peter.chubb@nicta.com.au> | 2015-05-14 09:57:56 +1000 |
|---|---|---|
| committer | Kukjin Kim <kgene@kernel.org> | 2015-06-03 09:56:46 +0900 |
| commit | 719f39fec58637cb141d337f22b35d3b8ccd1ff4 (patch) | |
| tree | 1a15002ca398fb84b2d5425e6dba5086f7585e0d /arch/arm/boot/dts/exynos5422-odroidxu3.dts | |
| parent | 81ce48162aeea9a4121e3cf7bd46c846ac6218f8 (diff) | |
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: 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>
Diffstat (limited to 'arch/arm/boot/dts/exynos5422-odroidxu3.dts')
| -rw-r--r-- | arch/arm/boot/dts/exynos5422-odroidxu3.dts | 50 |
1 files changed, 36 insertions, 14 deletions
diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3.dts b/arch/arm/boot/dts/exynos5422-odroidxu3.dts index 6403757011ba..10007bd44652 100644 --- a/arch/arm/boot/dts/exynos5422-odroidxu3.dts +++ b/arch/arm/boot/dts/exynos5422-odroidxu3.dts @@ -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"; + + 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"; }; - eMMC { - label = "green:eMMC"; - gpios = <&gpb2 1 0>; - default-state = "off"; - linux,default-trigger = "mmc0"; + blueled { + label = "blue:heartbeat"; + pwms = <&pwm 2 2000000 0>; + pwm-names = "pwm2"; + max_brightness = <255>; + linux,default-trigger = "heartbeat"; }; + }; - microSD { + 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>; |