From: Rob Herring <robh@kernel.org>
To: Ray Jui <ray.jui@broadcom.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>,
Mark Rutland <mark.rutland@arm.com>,
Frank Rowand <frowand.list@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org,
linux-kernel@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/5] Documentation: DT: Add optional 'timeout-sec' property for sp805
Date: Wed, 23 May 2018 13:59:44 -0500 [thread overview]
Message-ID: <20180523185944.GA9989@rob-hp-laptop> (raw)
In-Reply-To: <c542388f-e417-f624-ade1-95f9a2fc8a3b@broadcom.com>
On Wed, May 23, 2018 at 09:25:49AM -0700, Ray Jui wrote:
>
>
> On 5/23/2018 3:57 AM, 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 :/
> >
> > On a related note, anyone have any idea why we seem to have two subtly
> > different SP805 bindings defined?
Sigh.
> Interesting, I did not even know that until you pointed this out (and it's
> funny that I found that I actually reviewed arm,sp805.txt internally in
> Broadcom code review).
>
> It looks like one was done by Bhupesh Sharma (sp805-wdt.txt) and the other
> was done by Anup Patel (arm,sp805.txt). Both were merged at the same time
> around March 20, 2016: 915c56bc01d6. I'd assume both were sent out at around
> the same time.
>
> It sounds like we should definitely remove one of them. Given that
> sp805-wdt.txt appears to have more detailed descriptions on the use of the
> clocks, should we remove arm,sp805.txt?
Take whichever text you like, but I prefer filenames using the
compatible string and the correct string is 'arm,sp805' because '-wdt'
is redundant. You can probably safely just update all the dts files with
'arm,sp805' and just remove 'arm,sp805-wdt' because it is not actually
used (as the ID registers are).
Rob
next prev parent reply other threads:[~2018-05-23 18:59 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-22 18:47 [PATCH 0/5] Enhance support for the SP805 WDT Ray Jui
2018-05-22 18:47 ` [PATCH 1/5] Documentation: DT: Add optional 'timeout-sec' property for sp805 Ray Jui
2018-05-22 20:56 ` Guenter Roeck
2018-05-23 10:57 ` Robin Murphy
2018-05-23 16:25 ` Ray Jui
2018-05-23 18:59 ` Rob Herring [this message]
2018-05-23 19:29 ` Ray Jui
2018-05-24 13:52 ` Robin Murphy
2018-05-23 18:10 ` Guenter Roeck
2018-05-24 13:25 ` Robin Murphy
2018-05-24 16:07 ` Guenter Roeck
2018-05-22 18:47 ` [PATCH 2/5] watchdog: sp805: add 'timeout-sec' DT property support Ray Jui
2018-05-22 20:57 ` Guenter Roeck
2018-05-22 18:47 ` [PATCH 3/5] watchdog: sp805: set WDOG_HW_RUNNING when appropriate Ray Jui
2018-05-22 20:54 ` Guenter Roeck
2018-05-22 23:24 ` Ray Jui
2018-05-23 7:52 ` Scott Branden
2018-05-23 11:48 ` Robin Murphy
2018-05-23 16:29 ` Ray Jui
2018-05-23 17:15 ` Robin Murphy
2018-05-23 18:09 ` Guenter Roeck
2018-05-23 19:35 ` Ray Jui
2018-05-23 17:15 ` Scott Branden
2018-05-23 18:06 ` Guenter Roeck
2018-05-22 18:47 ` [PATCH 4/5] arm64: dt: set initial SR watchdog timeout to 60 seconds Ray Jui
2018-05-22 18:47 ` [PATCH 5/5] arm64: defconfig: add CONFIG_ARM_SP805_WATCHDOG Ray Jui
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