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

[Sanjay Chitroda <sanjayembeddedse@gmail.com>]

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