linux-kernel - Re: [PATCH v3 6/6] iio: pressure: bmp280: Use new PM macros

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Date:   Mon, 10 Jan 2022 13:19:50 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Len Brown <len.brown@...el.com>,
        Pavel Machek <pavel@....cz>, list@...ndingux.net,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-pm@...r.kernel.org,
        Jonathan Cameron <jonathan.cameron@...wei.com>
Subject: Re: [PATCH v3 6/6] iio: pressure: bmp280: Use new PM macros

On Fri, 7 Jan 2022 at 19:18, Paul Cercueil <paul@...pouillou.net> wrote:
>
> Use the new EXPORT_RUNTIME_DEV_PM_OPS() macro. It allows the underlying
> dev_pm_ops struct as well as the suspend/resume callbacks to be detected
> as dead code in the case where CONFIG_PM is disabled, without having to
> wrap everything inside #ifdef CONFIG_PM guards.
>
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Kind regards
Uffe

> ---
>
> Notes:
>     v2: New patch
>     v3: No change
>
>  drivers/iio/pressure/bmp280-core.c | 11 ++---------
>  drivers/iio/pressure/bmp280-i2c.c  |  2 +-
>  drivers/iio/pressure/bmp280-spi.c  |  2 +-
>  3 files changed, 4 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
> index 6b7da40f99c8..bf8167f43c56 100644
> --- a/drivers/iio/pressure/bmp280-core.c
> +++ b/drivers/iio/pressure/bmp280-core.c
> @@ -1138,7 +1138,6 @@ int bmp280_common_probe(struct device *dev,
>  }
>  EXPORT_SYMBOL(bmp280_common_probe);
>
> -#ifdef CONFIG_PM
>  static int bmp280_runtime_suspend(struct device *dev)
>  {
>         struct iio_dev *indio_dev = dev_get_drvdata(dev);
> @@ -1159,15 +1158,9 @@ static int bmp280_runtime_resume(struct device *dev)
>         usleep_range(data->start_up_time, data->start_up_time + 100);
>         return data->chip_info->chip_config(data);
>  }
> -#endif /* CONFIG_PM */
>
> -const struct dev_pm_ops bmp280_dev_pm_ops = {
> -       SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> -                               pm_runtime_force_resume)
> -       SET_RUNTIME_PM_OPS(bmp280_runtime_suspend,
> -                          bmp280_runtime_resume, NULL)
> -};
> -EXPORT_SYMBOL(bmp280_dev_pm_ops);
> +EXPORT_RUNTIME_DEV_PM_OPS(bmp280_dev_pm_ops, bmp280_runtime_suspend,
> +                         bmp280_runtime_resume, NULL);
>
>  MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@...el.com>");
>  MODULE_DESCRIPTION("Driver for Bosch Sensortec BMP180/BMP280 pressure and temperature sensor");
> diff --git a/drivers/iio/pressure/bmp280-i2c.c b/drivers/iio/pressure/bmp280-i2c.c
> index 8b03ea15c0d0..35045bd92846 100644
> --- a/drivers/iio/pressure/bmp280-i2c.c
> +++ b/drivers/iio/pressure/bmp280-i2c.c
> @@ -58,7 +58,7 @@ static struct i2c_driver bmp280_i2c_driver = {
>         .driver = {
>                 .name   = "bmp280",
>                 .of_match_table = bmp280_of_i2c_match,
> -               .pm = &bmp280_dev_pm_ops,
> +               .pm = pm_ptr(&bmp280_dev_pm_ops),
>         },
>         .probe          = bmp280_i2c_probe,
>         .id_table       = bmp280_i2c_id,
> diff --git a/drivers/iio/pressure/bmp280-spi.c b/drivers/iio/pressure/bmp280-spi.c
> index 625b86878ad8..41f6cc56d229 100644
> --- a/drivers/iio/pressure/bmp280-spi.c
> +++ b/drivers/iio/pressure/bmp280-spi.c
> @@ -109,7 +109,7 @@ static struct spi_driver bmp280_spi_driver = {
>         .driver = {
>                 .name = "bmp280",
>                 .of_match_table = bmp280_of_spi_match,
> -               .pm = &bmp280_dev_pm_ops,
> +               .pm = pm_ptr(&bmp280_dev_pm_ops),
>         },
>         .id_table = bmp280_spi_id,
>         .probe = bmp280_spi_probe,
> --
> 2.34.1
>