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

Commit 2fc94b5f authored by Fu Wei's avatar Fu Wei Committed by Wim Van Sebroeck
Browse files

Documentation: add sbsa-gwdt driver documentation 



The sbsa-gwdt.txt documentation in devicetree/bindings/watchdog is for
introducing SBSA(Server Base System Architecture) Generic Watchdog
device node info into FDT.

Also add sbsa-gwdt introduction in watchdog-parameters.txt

Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarFu Wei <fu.wei@linaro.org>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent c36a483d

Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt

0 → 100644
+31 −0
Original line number Diff line number Diff line 
* SBSA (Server Base System Architecture) Generic Watchdog



The SBSA Generic Watchdog Timer is used to force a reset of the system

after two stages of timeout have elapsed.  A detailed definition of the

watchdog timer can be found in the ARM document: ARM-DEN-0029 - Server

Base System Architecture (SBSA)



Required properties:

- compatible: Should at least contain "arm,sbsa-gwdt".



- reg: Each entry specifies the base physical address of a register frame

  and the length of that frame; currently, two frames must be defined,

  in this order:

  1: Watchdog control frame;

  2: Refresh frame.



- interrupts: Should contain the Watchdog Signal 0 (WS0) SPI (Shared

  Peripheral Interrupt) number of SBSA Generic Watchdog.



Optional properties

- timeout-sec: Watchdog timeout values (in seconds).



Example for FVP Foundation Model v8:



watchdog@2a440000 {

	compatible = "arm,sbsa-gwdt";

	reg = <0x0 0x2a440000 0 0x1000>,

	      <0x0 0x2a450000 0 0x1000>;

	interrupts = <0 27 4>;

	timeout-sec = <30>;

};

Documentation/watchdog/watchdog-parameters.txt

+7 −0
Original line number Diff line number Diff line
@@ -289,6 +289,13 @@ sbc_fitpc2_wdt: 
margin: Watchdog margin in seconds (default 60s)

nowayout: Watchdog cannot be stopped once started

-------------------------------------------------

sbsa_gwdt:

timeout: Watchdog timeout in seconds. (default 10s)

action: Watchdog action at the first stage timeout,

	set to 0 to ignore, 1 to panic. (default=0)

nowayout: Watchdog cannot be stopped once started

	(default=kernel config parameter)

-------------------------------------------------

sc1200wdt:

isapnp: When set to 0 driver ISA PnP support will be disabled (default=1)

io: io port