[PATCH v2 2/6] iio: light: stk3310: Implement vdd supply and power it off during suspend

[Andy Shevchenko]

On Wed, Apr 24, 2024 at 1:41 AM Aren Moynihan <aren at peacevolution.org> wrote:
>
> From: Ondrej Jirman <megi at xff.cz>
>
> VDD power input can be used to completely power off the chip during
> system suspend. Do so if available.

...

>         ret = stk3310_init(indio_dev);
>         if (ret < 0)
> -               return ret;
> +               goto err_vdd_disable;

This is wrong. You will have the regulator being disabled _before_
IRQ. Note, that the original code likely has a bug which sets states
before disabling IRQ and removing a handler.

Side note, you may make the driver neater with help of

  struct device *dev = &client->dev;

defined in this patch.

...

>  static int stk3310_suspend(struct device *dev)
>  {
>         struct stk3310_data *data;

>         data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));

Side note: This may be updated (in a separate change) to use
dev_get_drvdata() directly.

Jonathan, do we have something like iio_priv_from_drvdata(struct
device *dev)? Seems many drivers may utilise it.

>  }

...

>  static int stk3310_resume(struct device *dev)

Ditto.

--
With Best Regards,
Andy Shevchenko