From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- .../devicetree/bindings/leds/leds-gpio.txt | 66 ++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-gpio.txt (limited to 'Documentation/devicetree/bindings/leds/leds-gpio.txt') diff --git a/Documentation/devicetree/bindings/leds/leds-gpio.txt b/Documentation/devicetree/bindings/leds/leds-gpio.txt new file mode 100644 index 000000000..fea1ebfe2 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-gpio.txt @@ -0,0 +1,66 @@ +LEDs connected to GPIO lines + +Required properties: +- compatible : should be "gpio-leds". + +Each LED is represented as a sub-node of the gpio-leds device. Each +node's name represents the name of the corresponding LED. + +LED sub-node properties: +- gpios : Should specify the LED's GPIO, see "gpios property" in + Documentation/devicetree/bindings/gpio/gpio.txt. Active low LEDs should be + indicated using flags in the GPIO specifier. +- label : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- linux,default-trigger : (optional) + see Documentation/devicetree/bindings/leds/common.txt +- default-state: (optional) The initial state of the LED. Valid + values are "on", "off", and "keep". If the LED is already on or off + and the default-state property is set the to same value, then no + glitch should be produced where the LED momentarily turns off (or + on). The "keep" setting will keep the LED at whatever its current + state is, without producing a glitch. The default is off if this + property is not present. +- retain-state-suspended: (optional) The suspend state can be retained.Such + as charge-led gpio. + +Examples: + +#include + +leds { + compatible = "gpio-leds"; + hdd { + label = "IDE Activity"; + gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>; + linux,default-trigger = "ide-disk"; + }; + + fault { + gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>; + /* Keep LED on if BIOS detected hardware fault */ + default-state = "keep"; + }; +}; + +run-control { + compatible = "gpio-leds"; + red { + gpios = <&mpc8572 6 GPIO_ACTIVE_HIGH>; + default-state = "off"; + }; + green { + gpios = <&mpc8572 7 GPIO_ACTIVE_HIGH>; + default-state = "on"; + }; +}; + +leds { + compatible = "gpio-leds"; + + charger-led { + gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>; + linux,default-trigger = "max8903-charger-charging"; + retain-state-suspended; + }; +}; -- cgit v1.2.3-54-g00ecf