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dt: bindings: add documentation for zx2967 family watchdog controller

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This patch adds dt-binding documentation for zx2967 family
watchdog controller.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Baoyou Xie 2017-02-04 09:34:13 +08:00 committed by Guenter Roeck
parent f201353273
commit df823c19e5
1 changed files with 32 additions and 0 deletions
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32
Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt Normal file
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ZTE zx2967 Watchdog timer
Required properties:
- compatible : should be one of the following.
* zte,zx296718-wdt
- reg : Specifies base physical address and size of the registers.
- clocks : Pairs of phandle and specifier referencing the controller's clocks.
- resets : Reference to the reset controller controlling the watchdog
controller.
Optional properties:
- timeout-sec : Contains the watchdog timeout in seconds.
- zte,wdt-reset-sysctrl : Directs how to reset system by the watchdog.
if we don't want to restart system when watchdog been triggered,
it's not required, vice versa.
It should include following fields.
* phandle of aon-sysctrl.
* offset of register that be written, should be 0xb0.
* configure value that be written to aon-sysctrl.
* bit mask, corresponding bits will be affected.
Example:
wdt: watchdog@1465000 {
compatible = "zte,zx296718-wdt";
reg = <0x1465000 0x1000>;
clocks = <&topcrm WDT_WCLK>;
resets = <&toprst 35>;
zte,wdt-reset-sysctrl = <&aon_sysctrl 0xb0 1 0x115>;
};