From mboxrd@z Thu Jan 1 00:00:00 1970 From: fu.wei@linaro.org Subject: [PATCH v11 1/4] Documentation: add sbsa-gwdt driver documentation Date: Wed, 10 Feb 2016 01:00:37 +0800 Message-ID: <1455037240-16192-2-git-send-email-fu.wei@linaro.org> References: <1455037240-16192-1-git-send-email-fu.wei@linaro.org> Return-path: In-Reply-To: <1455037240-16192-1-git-send-email-fu.wei@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, wim@iguana.be, linux@roeck-us.net, corbet@lwn.net, catalin.marinas@arm.com, will.deacon@arm.com, Suravee.Suthikulpanit@amd.com Cc: linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-doc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-acpi@lists.linaro.org, rruigrok@codeaurora.org, harba@codeaurora.org, cov@codeaurora.org, timur@codeaurora.org, dyoung@redhat.com, panand@redhat.com, graeme.gregory@linaro.org, al.stone@linaro.org, hanjun.guo@linaro.org, jcm@redhat.com, arnd@arndb.de, leo.duran@amd.com, sudeep.holla@arm.com, Fu Wei List-Id: devicetree@vger.kernel.org From: Fu Wei The sbsa-gwdt.txt documentation in devicetree/bindings/watchdog is for introducing SBSA(Server Base System Architecture) Generic Watchdog device node info into FDT. Also add sbsa-gwdt introduction in watchdog-parameters.txt Acked-by: Arnd Bergmann Acked-by: Rob Herring Signed-off-by: Fu Wei --- .../devicetree/bindings/watchdog/sbsa-gwdt.txt | 35 ++++++++++++++++++++++ Documentation/watchdog/watchdog-parameters.txt | 7 +++++ 2 files changed, 42 insertions(+) diff --git a/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt new file mode 100644 index 0000000..73a5d0d --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt @@ -0,0 +1,35 @@ +* SBSA (Server Base System Architecture) Generic Watchdog + +The SBSA Generic Watchdog Timer is used to force a reset of the system +after two stages of timeout have elapsed. A detailed definition of the +watchdog timer can be found in the ARM document: ARM-DEN-0029 - Server +Base System Architecture (SBSA) + +Required properties: +- compatible: Should at least contain "arm,sbsa-gwdt". + +- reg: Each entry specifies the base physical address of a register frame + and the length of that frame; currently, two frames must be defined, + in this order: + 1: Watchdog control frame; + 2: Refresh frame. + +- interrupts: Should contain the Watchdog Signal 0 (WS0) SPI (Shared + Peripheral Interrupt) number of SBSA Generic Watchdog. + +Optional properties +- timeout-sec: Watchdog timeout values (in seconds). + +- status: Indicates the device is not available for use. Should be "okay" + or "disabled" for available/unavailable. Default is "okay". + +Example for FVP Foundation Model v8: + +watchdog@2a440000 { + compatible = "arm,sbsa-gwdt"; + reg = <0x0 0x2a440000 0 0x1000>, + <0x0 0x2a450000 0 0x1000>; + interrupts = <0 27 4>; + timeout-sec = <30>; + status = "okay"; +}; diff --git a/Documentation/watchdog/watchdog-parameters.txt b/Documentation/watchdog/watchdog-parameters.txt index 9f9ec9f..ce7ae4e 100644 --- a/Documentation/watchdog/watchdog-parameters.txt +++ b/Documentation/watchdog/watchdog-parameters.txt @@ -284,6 +284,13 @@ sbc_fitpc2_wdt: margin: Watchdog margin in seconds (default 60s) nowayout: Watchdog cannot be stopped once started ------------------------------------------------- +sbsa_gwdt: +timeout: Watchdog timeout in seconds. (default 10s) +action: Watchdog action at the first stage timeout, + set to 0 to ignore, 1 to panic. (default=0) +nowayout: Watchdog cannot be stopped once started + (default=kernel config parameter) +------------------------------------------------- sc1200wdt: isapnp: When set to 0 driver ISA PnP support will be disabled (default=1) io: io port -- 2.5.0