[deliverable/linux.git] / Documentation / devicetree / bindings / watchdog / st_lpc_wdt.txt

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;
	};
Commit	Line	Data
b0e68674 LJ	1	STMicroelectronics Low Power Controller (LPC) - Watchdog
	2	========================================================
	3
	4	LPC currently supports Watchdog OR Real Time Clock functionality.
	5
	6	[See: ../rtc/rtc-st-lpc.txt for RTC options]
	7
	8	Required properties
	9
	10	- compatible : Must be one of: "st,stih407-lpc" "st,stih416-lpc"
	11	"st,stih415-lpc" "st,stid127-lpc"
	12	- reg : LPC registers base address + size
	13	- interrupts : LPC interrupt line number and associated flags
	14	- clocks : Clock used by LPC device (See: ../clock/clock-bindings.txt)
	15	- st,lpc-mode : The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
	16	ST_LPC_MODE_WDT [1]. One (and only one) mode must be
	17	selected.
	18
	19	Required properties [watchdog mode]
	20
	21	- st,syscfg : Phandle to syscfg node used to enable watchdog and configure
	22	CPU reset type.
	23	- timeout-sec : Watchdog timeout in seconds
	24
	25	Optional properties [watchdog mode]
	26
	27	- st,warm-reset : If present reset type will be 'warm' - if not it will be cold
	28
	29	Example:
	30	lpc@fde05000 {
	31	compatible = "st,stih407-lpc";
	32	reg = <0xfde05000 0x1000>;
	33	clocks = <&clk_s_d3_flexgen CLK_LPC_0>;
	34	st,syscfg = <&syscfg_core>;
	35	timeout-sec = <120>;
	36	st,lpc-mode = <ST_LPC_MODE_WDT>;
	37	st,warm-reset;
	38	};