Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754541AbbHFFIL (ORCPT ); Thu, 6 Aug 2015 01:08:11 -0400 Received: from eusmtp01.atmel.com ([212.144.249.243]:1794 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754436AbbHFFIH (ORCPT ); Thu, 6 Aug 2015 01:08:07 -0400 From: Wenyou Yang To: , , , , , CC: , , , , , , , Subject: [PATCH v4 2/2] Documentation: dt: binding: atmel-sama5d4-wdt: for SAMA5D4 watchdog driver Date: Thu, 6 Aug 2015 12:59:30 +0800 Message-ID: <1438837170-4518-3-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1438837170-4518-1-git-send-email-wenyou.yang@atmel.com> References: <1438837170-4518-1-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2258 Lines: 58 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 --- .../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@fc068640 { + 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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/