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| author | Boris BREZILLON <b.brezillon@overkiz.com> | 2013-10-04 09:24:13 +0200 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2014-01-28 21:29:08 +0100 |
| commit | 6914c5873c227f0eb03e3860a1cf95a930a06f31 (patch) | |
| tree | eba8c919e4cef557bc8602482e38999b7016a981 /Documentation/devicetree | |
| parent | watchdog: at91sam9_wdt: better watchdog support (diff) | |
| download | linux-6914c5873c227f0eb03e3860a1cf95a930a06f31.tar.xz linux-6914c5873c227f0eb03e3860a1cf95a930a06f31.zip | |
watchdog: at91sam9_wdt: update device tree doc
Add new at91sam9 watchdog properties to the documentation.
Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/watchdog/atmel-wdt.txt | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt index fcdd48f7dcff..f90e294d7631 100644 --- a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt @@ -9,11 +9,37 @@ Required properties: Optional properties: - timeout-sec: contains the watchdog timeout in seconds. +- interrupts : Should contain WDT interrupt. +- atmel,max-heartbeat-sec : Should contain the maximum heartbeat value in + seconds. This value should be less or equal to 16. It is used to + compute the WDV field. +- atmel,min-heartbeat-sec : Should contain the minimum heartbeat value in + seconds. This value must be smaller than the max-heartbeat-sec value. + It is used to compute the WDD field. +- atmel,watchdog-type : Should be "hardware" or "software". Hardware watchdog + use the at91 watchdog reset. Software watchdog use the watchdog + interrupt to trigger a software reset. +- atmel,reset-type : Should be "proc" or "all". + "all" : assert peripherals and processor reset signals + "proc" : assert the processor reset signal + This is valid only when using "hardware" watchdog. +- atmel,disable : Should be present if you want to disable the watchdog. +- atmel,idle-halt : Should be present if you want to stop the watchdog when + entering idle state. +- atmel,dbg-halt : Should be present if you want to stop the watchdog when + entering debug state. Example: - watchdog@fffffd40 { compatible = "atmel,at91sam9260-wdt"; reg = <0xfffffd40 0x10>; - timeout-sec = <10>; + interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>; + timeout-sec = <15>; + atmel,watchdog-type = "hardware"; + atmel,reset-type = "all"; + atmel,dbg-halt; + atmel,idle-halt; + atmel,max-heartbeat-sec = <16>; + atmel,min-heartbeat-sec = <0>; + status = "okay"; }; |