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watchdog: qcom: document device tree bindings

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The Qualcomm Krait Processor Sub-system (KPSS) contains one or more
instances of the WDT.  Provide documentation on how to describe these in
the device tree.

Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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Josh Cartwright 2014-09-25 17:51:03 -05:00 committed by Wim Van Sebroeck
parent 1094ebe9d1
commit 7c92c3d584
1 changed files with 24 additions and 0 deletions
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Documentation/devicetree/bindings/watchdog/qcom-wdt.txt Normal file
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Qualcomm Krait Processor Sub-system (KPSS) Watchdog
---------------------------------------------------
Required properties :
- compatible : shall contain only one of the following:
"qcom,kpss-wdt-msm8960"
"qcom,kpss-wdt-apq8064"
"qcom,kpss-wdt-ipq8064"
- reg : shall contain base register location and length
- clocks : shall contain the input clock
Optional properties :
- timeout-sec : shall contain the default watchdog timeout in seconds,
if unset, the default timeout is 30 seconds
Example:
watchdog@208a038 {
compatible = "qcom,kpss-wdt-ipq8064";
reg = <0x0208a038 0x40>;
clocks = <&sleep_clk>;
timeout-sec = <10>;
};