linux-kernel - Re: [PATCH] dt-bindings: watchdog: fsl-imx-wdt: Add missing 'big-endian' property

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Message-ID: <ZrzPNmXLsqxjzM+J@lizhi-Precision-Tower-5810>
Date: Wed, 14 Aug 2024 11:37:26 -0400
From: Frank Li <Frank.li@....com>
To: Guenter Roeck <linux@...ck-us.net>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
	Animesh Agarwal <animeshagarwal28@...il.com>,
	Daniel Baluta <daniel.baluta@....com>,
	Wim Van Sebroeck <wim@...ux-watchdog.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, linux-watchdog@...r.kernel.org,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: watchdog: fsl-imx-wdt: Add missing
 'big-endian' property

On Tue, Aug 06, 2024 at 09:44:16AM -0700, Guenter Roeck wrote:
> On 8/6/24 08:49, Frank Li wrote:
> > On Tue, Aug 06, 2024 at 12:43:07PM +0200, Krzysztof Kozlowski wrote:
> > > On 06/08/2024 12:38, Animesh Agarwal wrote:
> > > > Add missing big-endian property in watchdog/fsl-imx-wdt.yaml schema.
> > > > This fixes dtbs_check errors.
> > > >
> > > > Cc: Daniel Baluta <daniel.baluta@....com>
> > > > Signed-off-by: Animesh Agarwal <animeshagarwal28@...il.com>
> > > > ---
> > > > There are 12 similar errors related to this missing property from
> > > > different blobs.
> > > >
> > > > ./arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dtb: watchdog@...0000:
> > > > Unevaluated properties are not allowed ('big-endian' was unexpected)from
> > > > schema $id: http://devicetree.org/schemas/watchdog/fsl-imx-wdt.yaml#
> > > > ---
> > >
> > > Not sure if this is correct. I mean, technically it is, but Frank Li was
> > > removing big-endian properties so please choose consistent approach.
> >
> > drivers/watchdog/imx2_wdt.c never parser big-endian. I suggest remove
> > big-endian in dts file. I suggest keep big-endian only if it really used.
> >

After Alexander Stein point out, check spec, and dump watch dog reset value
at ls1043a platform.

0x02A80000:  00 30 00 00 00 10 00 04 00 01 00 00 00 00 00 0

It is big-endian. imx2_wdt.c use regmap which call regmap_get_val_endian()
to handle endian.

So this change is corret.

Reviewed-by: Frank Li <Frank.Li@....com>

>
> Agreed.
>
> Guenter
>