linux-kernel - Re: [PATCH 16/17] ABI: sysfs-driver-ufs: Add another What for platform drivers

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Date:   Wed, 29 Sep 2021 09:39:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Avri Altman <Avri.Altman@....com>
Cc:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Bean Huo <beanhuo@...ron.com>, Can Guo <cang@...eaurora.org>,
        Daejun Park <daejun7.park@...sung.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 16/17] ABI: sysfs-driver-ufs: Add another What for
 platform drivers

On Wed, Sep 29, 2021 at 07:23:32AM +0000, Avri Altman wrote:
> > On Wed, Sep 29, 2021 at 06:32:40AM +0000, Avri Altman wrote:
> > > > The current what expressions:
> > > >         What:          /sys/bus/platform/drivers/ufshcd/*/...
> > > >
> > > > Doesn't actually match what (some?) platform drivers actually
> > > > export. For instance, drivers/scsi/ufs/ufs-hisi.c actually creates
> > > > the sysfs struct for ufshcd inside this directory:
> > > >
> > > >         /sys/devices/platform/soc/ff3c0000.ufs
> > > >
> > > > Which has those aliases:
> > > >
> > > >         /sys/devices/virtual/devlink/platform:fff35000.crg_ctrl--
> > > > platform:ff3c0000.ufs/consumer/
> > > >         /sys/bus/platform/drivers/ufshcd-hisi/ff3c0000.ufs/
> > > >         /sys/bus/platform/devices/soc/ff3c0000.ufs/
> > > >         /sys/bus/platform/devices/ff3c0000.ufs/
> > > >
> > > > So, add another What: for such files that will match the device ufs
> > > > entries, e. g.:
> > > >
> > > >         What:          /sys/bus/platform/devices/*.ufs/
> > > On some platforms the suffix is .ufshc So Maybe use:
> > > /sys/bus/platform/devices/*.ufs*/
> > 
> > That's confusing.  How about describing why "ufshc" is used in another
> > entry?  You all must have picked the new name for some reason to
> > differentiate, right?
> It's a platform thing. Better let the platform guys answer that.

What plaform people?