linux-kernel - Re: [PATCH v6 1/8] Documentation: add sbsa-gwdt.txt documentation

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Date:	Tue, 14 Jul 2015 09:49:38 -0500
From:	Rob Herring <robherring2@...il.com>
To:	fu.wei@...aro.org
Cc:	Suravee Suthikulanit <Suravee.Suthikulpanit@....com>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>,
	linux-watchdog@...r.kernel.org,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	tekkamanninja@...il.com, G Gregory <graeme.gregory@...aro.org>,
	Al Stone <al.stone@...aro.org>,
	Hanjun Guo <hanjun.guo@...aro.org>,
	Timur Tabi <timur@...eaurora.org>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Guenter Roeck <linux@...ck-us.net>, vgandhi@...eaurora.org,
	Wim Van Sebroeck <wim@...ana.be>,
	"jcm@...hat.com" <jcm@...hat.com>, leo.duran@....com,
	Jonathan Corbet <corbet@....net>,
	Mark Rutland <mark.rutland@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Rafael Wysocki <rjw@...ysocki.net>, dyoung@...hat.com,
	panand@...hat.com
Subject: Re: [PATCH v6 1/8] Documentation: add sbsa-gwdt.txt documentation

On Tue, Jun 23, 2015 at 9:16 AM,  <fu.wei@...aro.org> wrote:
> From: Fu Wei <fu.wei@...aro.org>
>
> The sbsa-gwdt.txt documentation in devicetree/bindings/watchdog is for
> introducing SBSA(Server Base System Architecture) Generic Watchdog
> device node info into FDT.
>
> Acked-by: Arnd Bergmann <arnd@...db.de>
> Signed-off-by: Fu Wei <fu.wei@...aro.org>
> ---
>  .../devicetree/bindings/watchdog/sbsa-gwdt.txt     | 36 ++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
>
> diff --git a/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
> new file mode 100644
> index 0000000..010e5c4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt
> @@ -0,0 +1,36 @@
> +* SBSA(Server Base System Architecture) Generic Watchdog
> +
> +The SBSA Generic Watchdog Timer is used for resetting the system after
> +two stages of timeout.
> +More details: ARM-DEN-0029 - Server Base System Architecture (SBSA)
> +
> +Required properties:
> +- compatible : Should at least contain "arm,sbsa-gwdt".
> +
> +- reg : base physical address of the frames and length of memory mapped region.

This needs to specify the ordering of refresh and control.

> +
> +- reg-names : Should contain the resource reg names to show the order of
> +  the values in "reg".
> +  Must include the following entries : "refresh", "control".

This should be optional.

> +- interrupts : Should at least contain WS0 interrupt,
> +  the WS1 Signal is optional.

s/Signal/interrupt/ ?

> +
> +- interrupt-names : Should contain the resource interrupt names.
> +  Must include the following entries : "ws0". "ws1" is optional.

This should be optional.

> +
> +Optional properties
> +- timeout-sec : Watchdog pre-timeout and timeout values (in seconds).
> +       The first is timeout values, then pre-timeout.
> +
> +Example for FVP Foundation Model v8:
> +
> +watchdog@...40000 {
> +       compatible = "arm,sbsa-gwdt";
> +       reg = <0x0 0x2a440000 0 0x1000>,
> +             <0x0 0x2a450000 0 0x1000>;
> +       reg-names = "control", "refresh";
> +       interrupts = <0 27 4>;
> +       interrupt-names = "ws0";
> +       timeout-sec = <10 5>;
> +};
> --
> 1.9.1
>
> --
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