Re: [PATCH] iio: accel: mma8452: use pm_ptr() for dev_pm_ops

[Jonathan Cameron <jic23@kernel.org>]

On Tue, 21 Apr 2026 07:23:06 +0530
Sanjay Chitroda <sanjayembeddedse@gmail.com> wrote:

> On 20 April 2026 1:36:14 pm IST, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> >Hi Sanjay,
> >
> >On Tue, 14 Apr 2026 at 21:20, Sanjay Chitroda
> ><sanjayembeddedse@gmail.com> wrote:  
> >> From: Sanjay Chitroda <sanjayembeddedse@gmail.com>
> >>
> >> Use pm_ptr() so the PM ops pointer is automatically set to
> >> NULL when CONFIG_PM is disabled. This avoids unused-function warnings
> >> and follows modern kernel power-management conventions.
> >>
> >> Signed-off-by: Sanjay Chitroda <sanjayembeddedse@gmail.com>  
> >
> >Thanks for your patch!
> >  
> >> --- a/drivers/iio/accel/mma8452.c
> >> +++ b/drivers/iio/accel/mma8452.c
> >> @@ -1744,7 +1744,6 @@ static void mma8452_remove(struct i2c_client *client)
> >>         regulator_disable(data->vdd_reg);
> >>  }
> >>
> >> -#ifdef CONFIG_PM
> >>  static int mma8452_runtime_suspend(struct device *dev)
> >>  {
> >>         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> >> @@ -1812,7 +1811,6 @@ static int mma8452_runtime_resume(struct device *dev)
> >>
> >>         return ret;
> >>  }
> >> -#endif
> >>
> >>  static const struct dev_pm_ops mma8452_pm_ops = {
> >>         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)  
> >
> >You are still getting defined but not used warnings, as reported by
> >the kernel test robot, due to the use of SET_SYSTEM_SLEEP_PM_OPS()
> >and SET_RUNTIME_PM_OPS().  Please define the structure using
> >DEFINE_RUNTIME_DEV_PM_OPS() to fix this.
> >  
> >> @@ -1835,7 +1833,7 @@ static struct i2c_driver mma8452_driver = {
> >>         .driver = {
> >>                 .name   = "mma8452",
> >>                 .of_match_table = mma8452_dt_ids,
> >> -               .pm     = &mma8452_pm_ops,
> >> +               .pm     = pm_ptr(&mma8452_pm_ops),
> >>         },
> >>         .probe = mma8452_probe,
> >>         .remove = mma8452_remove,  
> >
> >Gr{oetje,eeting}s,
> >
> >                        Geert
> >  
> Hi Greet,
> 
> Thank you for the review and feedback.
> I will update changes in next version.
> 
> Thank,
> Sanjay Chitroda

Trivial process thing.  Whilst it may seem less polite than you'd 
like to me, emails like this just add noise for those dealing with
a lot of review.  Save your thanks for the change log of the
next version (under the ---)

I've not grumped at anyone about this for a few weeks. You just
happen to be the unfortunate victim amongst many who do this!

Thanks,

Jonathan