Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6914c587 authored by Boris Brezillon's avatar Boris Brezillon Committed by Wim Van Sebroeck
Browse files

watchdog: at91sam9_wdt: update device tree doc 



Add new at91sam9 watchdog properties to the documentation.

Signed-off-by: default avatarBoris BREZILLON <b.brezillon@overkiz.com>
Acked-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 5161b31d

Documentation/devicetree/bindings/watchdog/atmel-wdt.txt

+28 −2
Original line number Diff line number Diff line
@@ -9,11 +9,37 @@ Required properties: 


Optional properties:

- timeout-sec: contains the watchdog timeout in seconds.

- interrupts : Should contain WDT interrupt.

- atmel,max-heartbeat-sec : Should contain the maximum heartbeat value in

	seconds. This value should be less or equal to 16. It is used to

	compute the WDV field.

- atmel,min-heartbeat-sec : Should contain the minimum heartbeat value in

	seconds. This value must be smaller than the max-heartbeat-sec value.

	It is used to compute the WDD field.

- atmel,watchdog-type : Should be "hardware" or "software". Hardware watchdog

	use the at91 watchdog reset. Software watchdog use the watchdog

	interrupt to trigger a software reset.

- atmel,reset-type : Should be "proc" or "all".

	"all" : assert peripherals and processor reset signals

	"proc" : assert the processor reset signal

	This is valid only when using "hardware" watchdog.

- atmel,disable : Should be present if you want to disable the watchdog.

- atmel,idle-halt : Should be present if you want to stop the watchdog when

	entering idle state.

- atmel,dbg-halt : Should be present if you want to stop the watchdog when

	entering debug state.



Example:



	watchdog@fffffd40 {

		compatible = "atmel,at91sam9260-wdt";

		reg = <0xfffffd40 0x10>;

		timeout-sec = <10>;

		interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;

		timeout-sec = <15>;

		atmel,watchdog-type = "hardware";

		atmel,reset-type = "all";

		atmel,dbg-halt;

		atmel,idle-halt;

		atmel,max-heartbeat-sec = <16>;

		atmel,min-heartbeat-sec = <0>;

		status = "okay";

	};