linux-kernel - Re: [PATCH v2] gpio: gpio-pca953x, Add get

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Message-ID: <CAMpxmJWZEhKho0+6zf=Ca8tif=Z7PcdNv2=tAsDnOUzeZLYqLg@mail.gmail.com>
Date:   Thu, 16 Apr 2020 15:21:44 +0200
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Paul Thomas <pthomas8589@...il.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] gpio: gpio-pca953x, Add get_multiple function

czw., 16 kwi 2020 o 13:22 Linus Walleij <linus.walleij@...aro.org> napisał(a):
>
> On Tue, Apr 14, 2020 at 5:30 PM Paul Thomas <pthomas8589@...il.com> wrote:
>
> > Implement a get_multiple function for gpio-pca953x. If a driver
> > leaves get_multiple unimplemented then gpio_chip_get_multiple()
> > in gpiolib.c takes care of it by calling chip->get() as needed.
> > For i2c chips this is very inefficient. For example if you do an
> > 8-bit read then instead of a single i2c transaction there are
> > 8 transactions reading the same byte!
> >
> > This has been tested with max7312 chips on a 5.2 kernel.
> >
> > Signed-off-by: Paul Thomas <pthomas8589@...il.com>
> > ---
> >  changes from v1: rebased to 5.7-rc1
>
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
>
> Since I know Bartosz is queueing other patches for this driver I
> let him pick it up.
>
> Yours,
> Linus Walleij

Patch applied. I removed the last line of the commit message since I
guess you did test it on v5.7-rc1 after all?

Bart