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authorFu Wei <fu.wei@linaro.org>2015-06-10 16:06:26 +0800
committerGraeme Gregory <graeme.gregory@linaro.org>2015-07-07 13:45:06 +0100
commit623d60d56d9829852f42983de4b10c7097613a47 (patch)
tree28fa79e20664ceda6e806c9f279e119fe986aee7
parentd8851d1b3bf5f89d2f390e3acfb9ca1d0d38241c (diff)
downloadleg-kernel-623d60d56d9829852f42983de4b10c7097613a47.tar.gz
Documentation: add sbsa-gwdt.txt 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. Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Fu Wei <fu.wei@linaro.org>
-rw-r--r--Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt36
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diff --git a/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
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+* 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>;
+};