linux-kernel - Re: [PATCH] iio: light: cm32181: Add PM support

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Message-ID: <CAAd53p4ZNna2G7hD4vDfDF-fAtLNJinr+tr9LddMq06yFT26YA@mail.gmail.com>
Date:   Wed, 6 Jul 2022 10:01:57 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Kevin Tsai <ktsai@...ellamicro.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Hans de Goede <hdegoede@...hat.com>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] iio: light: cm32181: Add PM support

On Wed, Jul 6, 2022 at 3:12 AM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Tue, Jul 5, 2022 at 2:31 PM Kai-Heng Feng
> <kai.heng.feng@...onical.com> wrote:
> >
> > The read on in_illuminance_input keeps at 0 after system sleep.
> >
> > So add proper suspend and resume callback to make the sensor keep
> > working after system sleep.
>
> ...
>
> > +static int cm32181_resume(struct device *dev)
> > +{
> > +       struct i2c_client *client = to_i2c_client(dev);
> > +       struct cm32181_chip *cm32181 = iio_priv(i2c_get_clientdata(client));
>
> Simply device_get_drvdata(dev) ?

iio_priv() is still needed to get the struct priv.

Kai-Heng

>
> > +       return i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD,
> > +                                        cm32181->conf_regs[CM32181_REG_ADDR_CMD]);
> > +}
>
> --
> With Best Regards,
> Andy Shevchenko