Re: [PATCH v5 10/11] platform/x86: int3472: Pass tps68470_regulator_platform_data to the tps68470-regulator MFD-cell

[Andy Shevchenko <andy.shevchenko@gmail.com>]

On Tue, Nov 2, 2021 at 4:59 PM Hans de Goede <hdegoede@redhat.com> wrote:
> On 11/2/21 15:34, Andy Shevchenko wrote:
> > On Tue, Nov 2, 2021 at 11:50 AM Hans de Goede <hdegoede@redhat.com> wrote:

...

> >> +               board_data = int3472_tps68470_get_board_data(dev_name(&client->dev));
> >> +               if (!board_data) {
> >> +                       dev_err(&client->dev, "No board-data found for this laptop/tablet model\n");
> >> +                       return -ENODEV;
> >
> > It's fine to use dev_err_probe() for known error codes.
> >
> >> +               }
> >
> > ...
> >
> >> +               cells[1].platform_data = (void *)board_data->tps68470_regulator_pdata;
> >
> > Do we need casting?
>
> Yes, the cast casts away a "const", the const is correct
> since the data only ever gets read by the regulator driver,
> but platform_data pointers are normally not const, so it
> is either the cast, or loose the const on the definition
> of the struct to which board_data->tps68470_regulator_pdata
> points...
>
> So not good choice here really, only chosing between bad
> options and I picked the lets do the cast "least worse"
> option (at least to me). I'm open to changing this.

Hmm... Okay, I was under the impression that MFD is using const for
that field...

-- 
With Best Regards,
Andy Shevchenko