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Commit b7079eea authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Jonathan Cameron
Browse files

iio: humidity: hts221: add power management support 



Add system sleep power management support to hts221 driver

Signed-off-by: default avatarLorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 3691e5a6

drivers/iio/humidity/hts221.h

+3 −0
Original line number Diff line number Diff line
@@ -57,12 +57,15 @@ struct hts221_hw { 


	struct hts221_sensor sensors[HTS221_SENSOR_MAX];



	bool enabled;

	u8 odr;



	const struct hts221_transfer_function *tf;

	struct hts221_transfer_buffer tb;

};



extern const struct dev_pm_ops hts221_pm_ops;



int hts221_config_drdy(struct hts221_hw *hw, bool enable);

int hts221_probe(struct iio_dev *iio_dev);

int hts221_power_on(struct hts221_hw *hw);

drivers/iio/humidity/hts221_core.c

+50 −4
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/device.h>

#include <linux/iio/sysfs.h>

#include <linux/delay.h>

#include <linux/pm.h>

#include <asm/unaligned.h>



#include "hts221.h"
@@ -307,15 +308,30 @@ hts221_sysfs_temp_oversampling_avail(struct device *dev, 


int hts221_power_on(struct hts221_hw *hw)

{

	return hts221_update_odr(hw, hw->odr);

	int err;



	err = hts221_update_odr(hw, hw->odr);

	if (err < 0)

		return err;



	hw->enabled = true;



	return 0;

}



int hts221_power_off(struct hts221_hw *hw)

{

	u8 data[] = {0x00, 0x00};

	__le16 data = 0;

	int err;



	return hw->tf->write(hw->dev, HTS221_REG_CNTRL1_ADDR, sizeof(data),

			     data);

	err = hw->tf->write(hw->dev, HTS221_REG_CNTRL1_ADDR, sizeof(data),

			    (u8 *)&data);

	if (err < 0)

		return err;



	hw->enabled = false;



	return 0;

}



static int hts221_parse_temp_caldata(struct hts221_hw *hw)
@@ -682,6 +698,36 @@ int hts221_probe(struct iio_dev *iio_dev) 
}

EXPORT_SYMBOL(hts221_probe);



static int __maybe_unused hts221_suspend(struct device *dev)

{

	struct iio_dev *iio_dev = dev_get_drvdata(dev);

	struct hts221_hw *hw = iio_priv(iio_dev);

	__le16 data = 0;

	int err;



	err = hw->tf->write(hw->dev, HTS221_REG_CNTRL1_ADDR, sizeof(data),

			    (u8 *)&data);



	return err < 0 ? err : 0;

}



static int __maybe_unused hts221_resume(struct device *dev)

{

	struct iio_dev *iio_dev = dev_get_drvdata(dev);

	struct hts221_hw *hw = iio_priv(iio_dev);

	int err = 0;



	if (hw->enabled)

		err = hts221_update_odr(hw, hw->odr);



	return err;

}



const struct dev_pm_ops hts221_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(hts221_suspend, hts221_resume)

};

EXPORT_SYMBOL(hts221_pm_ops);



MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");

MODULE_DESCRIPTION("STMicroelectronics hts221 sensor driver");

MODULE_LICENSE("GPL v2");

drivers/iio/humidity/hts221_i2c.c

+1 −0
Original line number Diff line number Diff line
@@ -105,6 +105,7 @@ MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table); 
static struct i2c_driver hts221_driver = {

	.driver = {

		.name = "hts221_i2c",

		.pm = &hts221_pm_ops,

		.of_match_table = of_match_ptr(hts221_i2c_of_match),

		.acpi_match_table = ACPI_PTR(hts221_acpi_match),

	},

drivers/iio/humidity/hts221_spi.c

+1 −0
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ MODULE_DEVICE_TABLE(spi, hts221_spi_id_table); 
static struct spi_driver hts221_driver = {

	.driver = {

		.name = "hts221_spi",

		.pm = &hts221_pm_ops,

		.of_match_table = of_match_ptr(hts221_spi_of_match),

	},

	.probe = hts221_spi_probe,