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author | Fu Wei <fu.wei@linaro.org> | 2016-02-29 16:46:47 +0800 |
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committer | Wim Van Sebroeck <wim@iguana.be> | 2016-03-04 20:23:14 +0100 |
commit | 2fc94b5f229a5d9d1db7fd91d0a4808cfeb915f5 (patch) | |
tree | e905e09129f78db5811090a8cd8b273667272e67 /Documentation/devicetree/bindings/watchdog | |
parent | c36a483d80072f7efdd09e94dd733120dc8ecfb2 (diff) | |
download | linux-stable-2fc94b5f229a5d9d1db7fd91d0a4808cfeb915f5.tar.gz linux-stable-2fc94b5f229a5d9d1db7fd91d0a4808cfeb915f5.tar.bz2 linux-stable-2fc94b5f229a5d9d1db7fd91d0a4808cfeb915f5.zip |
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: Arnd Bergmann <arnd@arndb.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Fu Wei <fu.wei@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'Documentation/devicetree/bindings/watchdog')
-rw-r--r-- | Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt new file mode 100644 index 000000000000..6f2d5f91964d --- /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>; +}; |