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iio: chemical: bme680: add power management

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Add runtime power management to the device.

Signed-off-by: Vasileios Amoiridis <vassilisamir@gmail.com>
Link: https://patch.msgid.link/20241202192341.33187-4-vassilisamir@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Vasileios Amoiridis 2024-12-02 20:23:41 +01:00 committed by Jonathan Cameron
parent 601f7269fc
commit 1e60a6545c
4 changed files with 106 additions and 7 deletions
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2
drivers/iio/chemical/bme680.h
View File

@ -2,6 +2,7 @@
#ifndef BME680_H_
#define BME680_H_
#include <linux/pm.h>
#include <linux/regmap.h>
#define BME680_REG_CHIP_ID 0xD0
@ -80,6 +81,7 @@
#define BME680_CALIB_RANGE_3_LEN 5
extern const struct regmap_config bme680_regmap_config;
extern const struct dev_pm_ops bme680_dev_pm_ops;
int bme680_core_probe(struct device *dev, struct regmap *regmap,
const char *name);

109
drivers/iio/chemical/bme680_core.c
View File

@ -14,6 +14,8 @@
#include <linux/device.h>
#include <linux/log2.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
@ -820,9 +822,9 @@ static int bme680_read_gas(struct bme680_data *data, int *comp_gas_res)
return 0;
}
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 = iio_priv(indio_dev);
int chan_val, ret;
@ -935,14 +937,33 @@ static int bme680_read_raw(struct iio_dev *indio_dev,
}
}
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 = iio_priv(indio_dev);
struct device *dev = regmap_get_device(data->regmap);
int ret;
ret = pm_runtime_resume_and_get(dev);
if (ret)
return ret;
ret = __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 <= 16 && is_power_of_2(rate));
}
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 = iio_priv(indio_dev);
@ -987,6 +1008,25 @@ static int bme680_write_raw(struct iio_dev *indio_dev,
}
}
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 = iio_priv(indio_dev);
struct device *dev = regmap_get_device(data->regmap);
int ret;
ret = pm_runtime_resume_and_get(dev);
if (ret)
return ret;
ret = __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[] = "1 2 4 8 16";
static IIO_CONST_ATTR(oversampling_ratio_available,
@ -1087,6 +1127,29 @@ static irqreturn_t bme680_trigger_handler(int irq, void *p)
return IRQ_HANDLED;
}
static int bme680_buffer_preenable(struct iio_dev *indio_dev)
{
struct bme680_data *data = iio_priv(indio_dev);
struct device *dev = regmap_get_device(data->regmap);
return pm_runtime_resume_and_get(dev);
}
static int bme680_buffer_postdisable(struct iio_dev *indio_dev)
{
struct bme680_data *data = iio_priv(indio_dev);
struct device *dev = 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 = {
.preenable = bme680_buffer_preenable,
.postdisable = bme680_buffer_postdisable,
};
int bme680_core_probe(struct device *dev, struct regmap *regmap,
const char *name)
{
@ -1160,15 +1223,47 @@ int bme680_core_probe(struct device *dev, struct regmap *regmap,
ret = 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");
/* Enable runtime PM */
pm_runtime_set_autosuspend_delay(dev, BME680_STARTUP_TIME_US);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_active(dev);
ret = devm_pm_runtime_enable(dev);
if (ret)
return ret;
return devm_iio_device_register(dev, indio_dev);
}
EXPORT_SYMBOL_NS_GPL(bme680_core_probe, "IIO_BME680");
static int bme680_runtime_suspend(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct bme680_data *data = iio_priv(indio_dev);
return bme680_set_mode(data, BME680_MODE_SLEEP);
}
static int bme680_runtime_resume(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct bme680_data *data = iio_priv(indio_dev);
int ret;
ret = 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 <himanshujha199640@gmail.com>");
MODULE_DESCRIPTION("Bosch BME680 Driver");
MODULE_LICENSE("GPL v2");

1
drivers/iio/chemical/bme680_i2c.c
View File

@ -51,6 +51,7 @@ static struct i2c_driver bme680_i2c_driver = {
.driver = {
.name = "bme680_i2c",
.of_match_table = bme680_of_i2c_match,
.pm = pm_ptr(&bme680_dev_pm_ops),
},
.probe = bme680_i2c_probe,
.id_table = bme680_i2c_id,

1
drivers/iio/chemical/bme680_spi.c
View File

@ -154,6 +154,7 @@ static struct spi_driver bme680_spi_driver = {
.driver = {
.name = "bme680_spi",
.of_match_table = bme680_of_spi_match,
.pm = pm_ptr(&bme680_dev_pm_ops),
},
.probe = bme680_spi_probe,
.id_table = bme680_spi_id,