From: Fu Wei fu.wei@linaro.org
The sbsa-gwdt.txt documentation in devicetree/bindings/watchdog is for introducing SBSA(Server Base System Architecture) Generic Watchdog device node info into FDT.
Acked-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Fu Wei fu.wei@linaro.org --- .../devicetree/bindings/watchdog/sbsa-gwdt.txt | 36 ++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
diff --git a/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt new file mode 100644 index 0000000..010e5c4 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt @@ -0,0 +1,36 @@ +* SBSA(Server Base System Architecture) Generic Watchdog + +The SBSA Generic Watchdog Timer is used for resetting the system after +two stages of timeout. +More details: ARM-DEN-0029 - Server Base System Architecture (SBSA) + +Required properties: +- compatible : Should at least contain "arm,sbsa-gwdt". + +- reg : base physical address of the frames and length of memory mapped region. + +- reg-names : Should contain the resource reg names to show the order of + the values in "reg". + Must include the following entries : "refresh", "control". + +- interrupts : Should at least contain WS0 interrupt, + the WS1 Signal is optional. + +- interrupt-names : Should contain the resource interrupt names. + Must include the following entries : "ws0". "ws1" is optional. + +Optional properties +- timeout-sec : Watchdog pre-timeout and timeout values (in seconds). + The first is timeout values, then pre-timeout. + +Example for FVP Foundation Model v8: + +watchdog@2a440000 { + compatible = "arm,sbsa-gwdt"; + reg = <0x0 0x2a440000 0 0x10000>, + <0x0 0x2a450000 0 0x10000>; + reg-names = "control", "refresh"; + interrupts = <0 27 4>; + interrupt-names = "ws0"; + timeout-sec = <10 5>; +};