linux-kernel - Re: [PATCH] gpiolib: Allow name duplicates of "" and "NC"

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Message-ID: <CACRpkdbXRHCDGX-YBbNY7cMob0dZNhi1ETA3QnC71ZtOYB30JQ@mail.gmail.com>
Date:   Wed, 16 Dec 2020 21:50:19 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        MSM <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH] gpiolib: Allow name duplicates of "" and "NC"

On Wed, Dec 16, 2020 at 7:40 PM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:

> > I think I will conjure a patch allowing identical naming only for
> > device property naming (like from device tree) but emitting a
> > warning so that people fix it to something unique moving
> > forward.
> >
>
> I'm not against emitting a dev_err() when we hit duplicates, remove the
> return and then update the various dts files to use "" for things that
> doesn't have a name.
>
> Regarding special handling of the DT case, I think (beyond making all
> these boards boot again) it would be nice to make
> gpiochip_set_desc_names() take the list of names and a length and use
> the same function in both code paths...
>
> PS. strlen(names[i]) is O(N), strcmp(names[i], "") is O(1).

OK I'll think of something. I'm pulling these patches out of the stuff
for this merge window because they are clearly immature,
nobody else is telling me so I have to realize it myself, it takes
like three days for me to do that...

Yours,
Linus Walleij