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Tue, 05 May 2026 10:47:18 -0700 (PDT) From: Sanjay Chitroda X-Google-Original-From: Sanjay Chitroda To: jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, sanjayembeddedse@gmail.com, sakari.ailus@linux.intel.com, christoph.muellner@theobroma-systems.com, martink@posteo.de, mfuzzey@parkeon.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 08/10] iio: accel: mma8452: use pm_ptr() and direct runtime PM calls Date: Tue, 5 May 2026 23:16:38 +0530 Message-Id: <20260505174640.3998281-9-sanjayembedded@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260505174640.3998281-1-sanjayembedded@gmail.com> References: <20260505174640.3998281-1-sanjayembedded@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Sanjay Chitroda Use pm_ptr() together with DEFINE_RUNTIME_DEV_PM_OPS() so the PM ops pointer is automatically handled when CONFIG_PM is enabled or disabled. Switch to direct PM runtime calls and drop mma8452_set_runtime_pm_state() wrapper, which is no longer needed. This follows modern kernel power-management conventions. Signed-off-by: Sanjay Chitroda --- Changes in v3: - Use direct PM runtime calls and drop redundant wrapper along with CONFIG_PM - Link to v2: https://lore.kernel.org/all/20260422165643.2148195-6-sanjayembedded@gmail.com/ Changes in v2: - Use DEFINE_RUNTIME_DEV_PM_OPS to address review comment and resolve 0-day bot warning - Link to v1: https://lore.kernel.org/all/20260414192045.3598010-1-sanjayembedded@gmail.com/ --- drivers/iio/accel/mma8452.c | 55 +++++++++++++------------------------ 1 file changed, 19 insertions(+), 36 deletions(-) diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index 2cd24b1543af..5ab981481599 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -219,34 +219,15 @@ static int mma8452_drdy(struct mma8452_data *data) return -EIO; } -static int mma8452_set_runtime_pm_state(struct i2c_client *client, bool on) -{ -#ifdef CONFIG_PM - struct device *dev = &client->dev; - int ret; - - if (on) - ret = pm_runtime_resume_and_get(dev); - else - ret = pm_runtime_put_autosuspend(dev); - if (ret < 0) { - dev_err(dev, "failed to change power state to %d\n", on); - - return ret; - } -#endif - - return 0; -} - static int mma8452_read(struct mma8452_data *data, __be16 buf[3]) { + struct device *dev = &data->client->dev; int ret = mma8452_drdy(data); if (ret < 0) return ret; - ret = mma8452_set_runtime_pm_state(data->client, true); + ret = pm_runtime_resume_and_get(dev); if (ret) return ret; @@ -255,9 +236,7 @@ static int mma8452_read(struct mma8452_data *data, __be16 buf[3]) if (ret < 0) return ret; - ret = mma8452_set_runtime_pm_state(data->client, false); - - return ret; + return pm_runtime_put_autosuspend(dev); } static ssize_t mma8452_show_int_plus_micros(char *buf, const int (*vals)[2], @@ -974,6 +953,7 @@ static int mma8452_write_event_config(struct iio_dev *indio_dev, bool state) { struct mma8452_data *data = iio_priv(indio_dev); + struct device *dev = &data->client->dev; int val, ret; const struct mma8452_event_regs *ev_regs; @@ -981,8 +961,11 @@ static int mma8452_write_event_config(struct iio_dev *indio_dev, if (ret) return ret; - ret = mma8452_set_runtime_pm_state(data->client, state); - if (ret) + if (state) + ret = pm_runtime_resume_and_get(dev); + else + ret = pm_runtime_put_autosuspend(dev); + if (ret < 0) return ret; switch (dir) { @@ -1452,10 +1435,15 @@ static int mma8452_data_rdy_trigger_set_state(struct iio_trigger *trig, { struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); struct mma8452_data *data = iio_priv(indio_dev); + struct device *dev = &data->client->dev; + int reg, ret; - ret = mma8452_set_runtime_pm_state(data->client, state); - if (ret) + if (state) + ret = pm_runtime_resume_and_get(dev); + else + ret = pm_runtime_put_autosuspend(dev); + if (ret < 0) return ret; reg = i2c_smbus_read_byte_data(data->client, MMA8452_CTRL_REG4); @@ -1738,7 +1726,6 @@ static void mma8452_remove(struct i2c_client *client) regulator_bulk_disable(ARRAY_SIZE(data->regs), data->regs); } -#ifdef CONFIG_PM static int mma8452_runtime_suspend(struct device *dev) { struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); @@ -1792,13 +1779,9 @@ 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) - SET_RUNTIME_PM_OPS(mma8452_runtime_suspend, - mma8452_runtime_resume, NULL) -}; +static DEFINE_RUNTIME_DEV_PM_OPS(mma8452_pm_ops, mma8452_runtime_suspend, + mma8452_runtime_resume, NULL); static const struct i2c_device_id mma8452_id[] = { { "fxls8471", (kernel_ulong_t)&mma_chip_info_table[fxls8471] }, @@ -1815,7 +1798,7 @@ 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, -- 2.34.1