[deliverable/linux.git] / Documentation / devicetree / bindings / power_supply / qnap-poweroff.txt

* QNAP Power Off

QNAP NAS devices have a microcontroller controlling the main power
supply. This microcontroller is connected to UART1 of the Kirkwood and
Orion5x SoCs. Sending the character 'A', at 19200 baud, tells the
microcontroller to turn the power off. This driver adds a handler to
pm_power_off which is called to turn the power off.

Synology NAS devices use a similar scheme, but a different baud rate,
9600, and a different character, '1'.

Required Properties:
- compatible: Should be "qnap,power-off" or "synology,power-off"

- reg: Address and length of the register set for UART1
- clocks: tclk clock
Commit	Line	Data
e8fc721a AL	1	* QNAP Power Off
	2
	3	QNAP NAS devices have a microcontroller controlling the main power
	4	supply. This microcontroller is connected to UART1 of the Kirkwood and
372c1d6d	5	Orion5x SoCs. Sending the character 'A', at 19200 baud, tells the
e8fc721a AL	6	microcontroller to turn the power off. This driver adds a handler to
	7	pm_power_off which is called to turn the power off.
	8
200c0a3e AL	9	Synology NAS devices use a similar scheme, but a different baud rate,
	10	9600, and a different character, '1'.
	11
e8fc721a	12	Required Properties:
200c0a3e	13	- compatible: Should be "qnap,power-off" or "synology,power-off"
e8fc721a AL	14
	15	- reg: Address and length of the register set for UART1
	16	- clocks: tclk clock