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Date: Wed, 23 May 2018 11:10:58 -0700
From: Guenter Roeck <linux@roeck-us.net>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Ray Jui <ray.jui@broadcom.com>,
        Wim Van Sebroeck <wim@linux-watchdog.org>,
        Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
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        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>, devicetree@vger.kernel.org,
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Subject: Re: [PATCH 1/5] Documentation: DT: Add optional 'timeout-sec'
 property for sp805
Message-ID: <20180523181058.GC27570@roeck-us.net>
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On Wed, May 23, 2018 at 11:57:25AM +0100, Robin Murphy wrote:
> On 22/05/18 19:47, Ray Jui wrote:
> >Update the SP805 binding document to add optional 'timeout-sec'
> >devicetree property
> >
> >Signed-off-by: Ray Jui <ray.jui@broadcom.com>
> >Reviewed-by: Scott Branden <scott.branden@broadcom.com>
> >---
> >  Documentation/devicetree/bindings/watchdog/sp805-wdt.txt | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> >diff --git a/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt b/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
> >index edc4f0e..f898a86 100644
> >--- a/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
> >+++ b/Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
> >@@ -19,6 +19,8 @@ Required properties:
> >  Optional properties:
> >  - interrupts : Should specify WDT interrupt number.
> >+- timeout-sec : Should specify default WDT timeout in seconds. If unset, the
> >+                default timeout is 30 seconds
> 
> According to the SP805 TRM, the default interval is dependent on the rate of
> WDOGCLK, but would typically be a lot longer than that :/
> 
Depends on the definition of "default". In the context of watchdog drivers,
it is (or should be) a driver default, not a chip default.

Guenter

> On a related note, anyone have any idea why we seem to have two subtly
> different SP805 bindings defined?
> 
> Robin.
> 
> >  Examples:
> >
> --
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