| Message ID | 1455611785-2407-2-git-send-email-fu.wei@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
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 >
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