[linux-2.6-block.git] / Documentation / devicetree / bindings / power / reset / ltc2952-poweroff.txt

Binding for the LTC2952 PowerPath controller

This chip is used to externally trigger a system shut down. Once the trigger has
been sent, the chip's watchdog has to be reset to gracefully shut down.
A full powerdown can be triggered via the kill signal.

Required properties:

- compatible:		Must contain: "lltc,ltc2952"
- watchdog-gpios:	phandle + gpio-specifier for the GPIO connected to the
			chip's watchdog line
- kill-gpios:		phandle + gpio-specifier for the GPIO connected to the
			chip's kill line

Optional properties:
- trigger-gpios:	phandle + gpio-specifier for the GPIO connected to the
			chip's trigger line. If this property is not set, the
			trigger function is ignored and the chip is kept alive
			until an explicit kill signal is received

Example:

ltc2952 {
	compatible = "lltc,ltc2952";

	trigger-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
	watchdog-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
	kill-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
};
Commit	Line	Data
a4b7aef6 RM	1	Binding for the LTC2952 PowerPath controller
	2
	3	This chip is used to externally trigger a system shut down. Once the trigger has
0f2ecb8f FK	4	been sent, the chip's watchdog has to be reset to gracefully shut down.
0f2ecb8f FK	5	A full powerdown can be triggered via the kill signal.
a4b7aef6 RM	6
	7	Required properties:
	8
	9	- compatible: Must contain: "lltc,ltc2952"
a4b7aef6 RM	10	- watchdog-gpios: phandle + gpio-specifier for the GPIO connected to the
	11	chip's watchdog line
	12	- kill-gpios: phandle + gpio-specifier for the GPIO connected to the
	13	chip's kill line
	14
0f2ecb8f FK	15	Optional properties:
	16	- trigger-gpios: phandle + gpio-specifier for the GPIO connected to the
	17	chip's trigger line. If this property is not set, the
	18	trigger function is ignored and the chip is kept alive
	19	until an explicit kill signal is received
	20
a4b7aef6 RM	21	Example:
	22
	23	ltc2952 {
	24	compatible = "lltc,ltc2952";
	25
	26	trigger-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
	27	watchdog-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
	28	kill-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
	29	};