linux-kernel - Re: [PATCH v3 3/6] pinctrl: renesas: pinctrl-rzg2l: Add helper functions to read/write pin config

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Message-ID: <CA+V-a8sJuYg5_aSc5toAy10YXDBe4GMcyE8xMJ+TTT0KhPCxeA@mail.gmail.com>
Date:   Fri, 12 Nov 2021 14:17:23 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v3 3/6] pinctrl: renesas: pinctrl-rzg2l: Add helper
 functions to read/write pin config

Hi Geert,

Thank you for the review.

On Fri, Nov 12, 2021 at 2:06 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Wed, Nov 10, 2021 at 11:46 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > Add helper functions to read/read modify write pin config.
> >
> > Switch to use helper functions for pins supporting PIN_CONFIG_INPUT_ENABLE
> > capabilities.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
> > ---
> > v2->v3
> > * Dropped duplicate masking in rzg2l_read_pin_config
> > * Dropped port_pin flag
> > * Dropped spinlocks around read/write
>
> You do need the spinlock in the read-modify-write case.
>
Ouch I mistook your comment of dropping the lock entirely!
> No worries, I'll add it back while applying.
>
Thank you.

Cheers,
Prabhakar

> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> i.e. will queue in renesas-pinctrl-for-v5.17.
>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds