linux-kernel - Re: [PATCH 1/3] mfd: da9062: fix watchdog compatible string

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Message-ID: <20200114162359.weoirknje6yhcmds@pengutronix.de>
Date:   Tue, 14 Jan 2020 17:23:59 +0100
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Cc:     Support Opensource <Support.Opensource@...semi.com>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "lee.jones@...aro.org" <lee.jones@...aro.org>,
        Steve Twiss <stwiss.opensource@...semi.com>,
        "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>
Subject: Re: [PATCH 1/3] mfd: da9062: fix watchdog compatible string

On 20-01-14 16:19, Adam Thomson wrote:
> On 08 January 2020 09:57, Marco Felsch wrote:
> 
> > The watchdog driver compatible is "dlg,da9062-watchdog" and not
> > "dlg,da9062-wdt". Therefore the mfd-core can't populate the of_node and
> > fwnode. As result the watchdog driver can't parse the devicetree.
> > 
> 
> I do agree there's a mismatch between the documentation and the MFD code.
> So in your DT are you specifying 'dlg,da9062-watchdog' and not 'dlg,da9062-wdt'
> hence the issue? Are there any existing users who are using 'dlg,da9062-wdt' in
> their DT instead?

Yes the upstream available DT I'm currently using is:
arch/arm/boot/dts/imx6qdl-phytec-phycore-som.dtsi.

I grep the code and found no _upstream_ user of 'dlg,da9062-wdt' also
using this compatible would be a missmatch with the binding
documentation. So those DT's assuming a wrong binding. Therefore I fixed
it here and not within the watchdog driver.

Regards,
  Marco

> > Fixes: 9b40b030c4ad ("mfd: da9062: Supply core driver")
> > Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> > ---
> >  drivers/mfd/da9062-core.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/mfd/da9062-core.c b/drivers/mfd/da9062-core.c
> > index e69626867c26..9143de7b77b8 100644
> > --- a/drivers/mfd/da9062-core.c
> > +++ b/drivers/mfd/da9062-core.c
> > @@ -248,7 +248,7 @@ static const struct mfd_cell da9062_devs[] = {
> >  		.name		= "da9062-watchdog",
> >  		.num_resources	= ARRAY_SIZE(da9062_wdt_resources),
> >  		.resources	= da9062_wdt_resources,
> > -		.of_compatible  = "dlg,da9062-wdt",
> > +		.of_compatible  = "dlg,da9062-watchdog",
> >  	},
> >  	{
> >  		.name		= "da9062-thermal",
> > --
> > 2.20.1
> 
> 

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