Re: [PATCH 2/2] hwmon: acpi_power_meter: convert to hwmon_device_register_with_info

[Guenter Roeck]

On 5/2/22 13:31, Armin Wolf wrote:
> Am 02.05.22 um 20:59 schrieb LABBE Corentin:
>
> > Le Mon, May 02, 2022 at 06:34:44AM -0700, Guenter Roeck a écrit :
> > > On 5/2/22 05:42, Corentin Labbe wrote:
> > > > Booting lead to a hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().
> > > > So let's convert the driver to use hwmon_device_register_with_info().
> > > >
> > > > Signed-off-by: Corentin Labbe <clabbe@xxxxxxxxxxxx>
> > > > ---
> > > >    drivers/hwmon/acpi_power_meter.c | 5 ++++-
> > > >    1 file changed, 4 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/hwmon/acpi_power_meter.c b/drivers/hwmon/acpi_power_meter.c
> > > > index d2545a1be9fc..98293727f980 100644
> > > > --- a/drivers/hwmon/acpi_power_meter.c
> > > > +++ b/drivers/hwmon/acpi_power_meter.c
> > > > @@ -891,7 +891,10 @@ static int acpi_power_meter_add(struct acpi_device *device)
> > > >        if (res)
> > > >            goto exit_free_capability;
> > > >
> > > > -    resource->hwmon_dev = hwmon_device_register(&device->dev);
> > > > +    resource->hwmon_dev = hwmon_device_register_with_info(&device->dev,
> > > > +                                  ACPI_POWER_METER_DEVICE_NAME,
> > > > +                                  NULL, NULL,
> > > > +                                  NULL);
> > > NACK. That isn't a conversion to the new API, it just abuses the fact
> > > that the new API has to accept a NULL info pointer for historic reasons.
> > Hello
> >
> > I am sorry, I found a driver doing it, so I believed it was okay.
> > Converting seems not to hard but, by using the new API, how can I convert power1_model_number/power1_is_battery attribute ?
> > There are the remaining attributes I dont find how to convert.
> >
> > Regards
>
> Hi,
>
> for allowing the driver to provide nonstandard attributes, hwmon_device_register_with_info()
> has the argument "extra_groups" which is an pointer to a list of sysfs attribute groups.
> There are some drivers which are using this functionality, maybe you can use them as an
> inspiration.
>
> Just a question: what is the name of the driver you originally used as an inspiration?

Originally it was for drivers/thermal/thermal_hwmon.c. Now there is also
drivers/platform/mips/cpu_hwmon.c which is clearly an abuse. I may have
missed others.

Guenter