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Date: Wed, 5 Aug 2015 10:35:30 +0800 From: Wenyou Yang <wenyou.yang@...el.com> To: <wim@...ana.be>, <robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>, <ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org> CC: <sylvain.rochet@...secur.com>, <nicolas.ferre@...el.com>, <boris.brezillon@...e-electrons.com>, <wenyou.yang@...el.com>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-watchdog@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org> Subject: [PATCH v2 2/2] Documentation: dt: binding: atmel-sama5d4-wdt: for SAMA5D4 watchdog driver The compatible "atmel,sama5d4-wdt" supports the SAMA5D4 watchdog driver and the watchdog's WDT_MR register can be written more than once. Signed-off-by: Wenyou Yang <wenyou.yang@...el.com> --- .../bindings/watchdog/atmel-sama5d4-wdt.txt | 35 ++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt diff --git a/Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt new file mode 100644 index 0000000..f7cc7c0 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt @@ -0,0 +1,35 @@ +* Atmel SAMA5D4 Watchdog Timer (WDT) Controller + +Required properties: +- compatible: "atmel,sama5d4-wdt" +- reg: base physical address and length of memory mapped region. + +Optional properties: +- timeout-sec: watchdog timeout value (in seconds). +- interrupts: interrupt number to the CPU. +- atmel,watchdog-type: should be "hardware" or "software". + "hardware": enable watchdog fault reset. A watchdog fault triggers + watchdog reset. + "software": enable watchdog fault interrupt. A watchdog fault asserts + watchdog interrupt. +- atmel,idle-halt: present if you want to stop the watchdog when the CPU is + in idle state. + CAUTION: This property should be used with care, it actually makes the + watchdog not counting when the CPU is in idle state, therefore the + watchdog reset time depends on mean CPU usage and will not reset at all + if the CPU stop working while it is in idle state, which is probably + not what you want. +- atmel,dbg-halt: present if you want to stop the watchdog when the CPU is + in debug state. + +Example: + watchdog@...68640 { + compatible = "atmel,sama5d4-wdt"; + reg = <0xfc068640 0x10>; + interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>; + timeout-sec = <10>; + atmel,watchdog-type = "hardware"; + atmel,dbg-halt; + atmel,idle-halt; + status = "okay"; + }; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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