On 02/16/2016 12:36 AM, fu.wei@linaro.org wrote:
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.
Also add sbsa-gwdt introduction in watchdog-parameters.txt
Acked-by: Arnd Bergmann arnd@arndb.de Acked-by: Rob Herring robh@kernel.org Signed-off-by: Fu Wei fu.wei@linaro.org
Reviewed-by: Guenter Roeck linux@roeck-us.net
.../devicetree/bindings/watchdog/sbsa-gwdt.txt | 31 ++++++++++++++++++++++ Documentation/watchdog/watchdog-parameters.txt | 7 +++++ 2 files changed, 38 insertions(+)
diff --git a/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt new file mode 100644 index 0000000..6f2d5f9 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt @@ -0,0 +1,31 @@ +* 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>;
+}; diff --git a/Documentation/watchdog/watchdog-parameters.txt b/Documentation/watchdog/watchdog-parameters.txt index 9f9ec9f..ce7ae4e 100644 --- a/Documentation/watchdog/watchdog-parameters.txt +++ b/Documentation/watchdog/watchdog-parameters.txt @@ -284,6 +284,13 @@ 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