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Commit b0e68674 authored by Lee Jones's avatar Lee Jones
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watchdog: bindings: Provide ST bindings for ST's LPC Watchdog device 



On current ST platforms the LPC controls a number of functions including
Watchdog and Real Time Clock.  This patch provides the bindings used to
configure LPC in Watchdog mode.

Acked-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 0b30d25d

Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt

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STMicroelectronics Low Power Controller (LPC) - Watchdog

========================================================



LPC currently supports Watchdog OR Real Time Clock functionality.



[See: ../rtc/rtc-st-lpc.txt for RTC options]



Required properties



- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"

				  "st,stih415-lpc" "st,stid127-lpc"

- reg		: LPC registers base address + size

- interrupts    : LPC interrupt line number and associated flags

- clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)

- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or

		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be

		  selected.



Required properties [watchdog mode]



- st,syscfg	: Phandle to syscfg node used to enable watchdog and configure

		  CPU reset type.

- timeout-sec	: Watchdog timeout in seconds



Optional properties [watchdog mode]



- st,warm-reset	: If present reset type will be 'warm' - if not it will be cold



Example:

	lpc@fde05000 {

		compatible	= "st,stih407-lpc";

		reg		= <0xfde05000 0x1000>;

		clocks 		= <&clk_s_d3_flexgen CLK_LPC_0>;

		st,syscfg	= <&syscfg_core>;

		timeout-sec	= <120>;

		st,lpc-mode	= <ST_LPC_MODE_WDT>;

		st,warm-reset;

	};