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([2a04:ee41:82:7577:9cf6:f1e5:ce2b:ea6b]) by smtp.googlemail.com with ESMTPSA id 4fb4d7f45d1cf-5cb66c6b12dsm2338702a12.77.2024.10.21.12.53.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Oct 2024 12:53:45 -0700 (PDT) From: Vasileios Amoiridis To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andriy.shevchenko@linux.intel.com Cc: vassilisamir@gmail.com, anshulusr@gmail.com, gustavograzs@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 13/13] iio: chemical: bme680: add power management Date: Mon, 21 Oct 2024 21:53:16 +0200 Message-ID: <20241021195316.58911-14-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241021195316.58911-1-vassilisamir@gmail.com> References: <20241021195316.58911-1-vassilisamir@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: quoted-printable Content-Type: text/plain; charset="utf-8" Add runtime power management to the device. To facilitate this, add also a struct dev* inside the bme680_data structure to have the device accesible from the data structure. Signed-off-by: Vasileios Amoiridis --- drivers/iio/chemical/bme680.h | 2 + drivers/iio/chemical/bme680_core.c | 126 +++++++++++++++++++++++++++-- 2 files changed, 121 insertions(+), 7 deletions(-) diff --git a/drivers/iio/chemical/bme680.h b/drivers/iio/chemical/bme680.h index e5d82a6d5b59..74e97e35e35a 100644 --- a/drivers/iio/chemical/bme680.h +++ b/drivers/iio/chemical/bme680.h @@ -2,6 +2,7 @@ #ifndef BME680_H_ #define BME680_H_ =20 +#include #include =20 #define BME680_REG_CHIP_ID 0xD0 @@ -82,6 +83,7 @@ #define BME680_CALIB_RANGE_3_LEN 5 =20 extern const struct regmap_config bme680_regmap_config; +extern const struct dev_pm_ops bme680_dev_pm_ops; =20 int bme680_core_probe(struct device *dev, struct regmap *regmap, const char *name); diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme6= 80_core.c index 2d9d20f203aa..803aa4f14b37 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -14,6 +14,8 @@ #include #include #include +#include +#include #include #include =20 @@ -823,9 +825,9 @@ static int bme680_read_gas(struct bme680_data *data, in= t *comp_gas_res) return 0; } =20 -static int bme680_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, int *val2, long mask) +static int __bme680_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) { struct bme680_data *data =3D iio_priv(indio_dev); int chan_val, ret; @@ -937,14 +939,30 @@ static int bme680_read_raw(struct iio_dev *indio_dev, } } =20 +static int bme680_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + int ret; + + pm_runtime_get_sync(dev); + ret =3D __bme680_read_raw(indio_dev, chan, val, val2, mask); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return ret; +} + static bool bme680_is_valid_oversampling(int rate) { return (rate > 0 && rate <=3D 16 && is_power_of_2(rate)); } =20 -static int bme680_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, int val2, long mask) +static int __bme680_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) { struct bme680_data *data =3D iio_priv(indio_dev); =20 @@ -989,6 +1007,22 @@ static int bme680_write_raw(struct iio_dev *indio_dev, } } =20 +static int bme680_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + int ret; + + pm_runtime_get_sync(dev); + ret =3D __bme680_write_raw(indio_dev, chan, val, val2, mask); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return ret; +} + static const char bme680_oversampling_ratio_show[] =3D "1 2 4 8 16"; =20 static IIO_CONST_ATTR(oversampling_ratio_available, @@ -1091,6 +1125,39 @@ static irqreturn_t bme680_trigger_handler(int irq, v= oid *p) return IRQ_HANDLED; } =20 +static int bme680_buffer_preenable(struct iio_dev *indio_dev) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + + pm_runtime_get_sync(dev); + return 0; +} + +static int bme680_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + return 0; +} + +static const struct iio_buffer_setup_ops bme680_buffer_setup_ops =3D { + .preenable =3D bme680_buffer_preenable, + .postdisable =3D bme680_buffer_postdisable, +}; + +static void bme680_pm_disable(void *data) +{ + struct device *dev =3D data; + + pm_runtime_get_sync(dev); + pm_runtime_put_noidle(dev); + pm_runtime_disable(dev); +} + int bme680_core_probe(struct device *dev, struct regmap *regmap, const char *name) { @@ -1164,15 +1231,60 @@ int bme680_core_probe(struct device *dev, struct re= gmap *regmap, ret =3D devm_iio_triggered_buffer_setup(dev, indio_dev, iio_pollfunc_store_time, bme680_trigger_handler, - NULL); + &bme680_buffer_setup_ops); if (ret) return dev_err_probe(dev, ret, "iio triggered buffer setup failed\n"); =20 + /* Enable runtime PM */ + pm_runtime_get_noresume(dev); + pm_runtime_set_autosuspend_delay(dev, BME680_STARTUP_TIME_US * 100); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_active(dev); + ret =3D devm_pm_runtime_enable(dev); + if (ret) + return ret; + + pm_runtime_put(dev); + + ret =3D devm_add_action_or_reset(dev, bme680_pm_disable, dev); + if (ret) + return ret; + return devm_iio_device_register(dev, indio_dev); } EXPORT_SYMBOL_NS_GPL(bme680_core_probe, IIO_BME680); =20 +static int bme680_runtime_suspend(struct device *dev) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct bme680_data *data =3D iio_priv(indio_dev); + + return regulator_bulk_disable(BME680_NUM_SUPPLIES, data->supplies); +} + +static int bme680_runtime_resume(struct device *dev) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct bme680_data *data =3D iio_priv(indio_dev); + int ret; + + ret =3D regulator_bulk_enable(BME680_NUM_SUPPLIES, data->supplies); + if (ret) + return ret; + + fsleep(BME680_STARTUP_TIME_US); + + ret =3D bme680_chip_config(data); + if (ret) + return ret; + + return bme680_gas_config(data); +} + +EXPORT_RUNTIME_DEV_PM_OPS(bme680_dev_pm_ops, bme680_runtime_suspend, + bme680_runtime_resume, NULL); + MODULE_AUTHOR("Himanshu Jha "); MODULE_DESCRIPTION("Bosch BME680 Driver"); MODULE_LICENSE("GPL v2"); --=20 2.43.0