diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/humidity/hts221.h | 3 | ||||
| -rw-r--r-- | drivers/iio/humidity/hts221_core.c | 54 | ||||
| -rw-r--r-- | drivers/iio/humidity/hts221_i2c.c | 1 | ||||
| -rw-r--r-- | drivers/iio/humidity/hts221_spi.c | 1 |
4 files changed, 55 insertions, 4 deletions
diff --git a/drivers/iio/humidity/hts221.h b/drivers/iio/humidity/hts221.h index c7154665512e..94510266e0a5 100644 --- a/drivers/iio/humidity/hts221.h +++ b/drivers/iio/humidity/hts221.h @@ -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); diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c index 3f3ef4a1a474..a56da3999e00 100644 --- a/drivers/iio/humidity/hts221_core.c +++ b/drivers/iio/humidity/hts221_core.c @@ -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"); diff --git a/drivers/iio/humidity/hts221_i2c.c b/drivers/iio/humidity/hts221_i2c.c index 8333c0296c0e..f38e4b7e0160 100644 --- a/drivers/iio/humidity/hts221_i2c.c +++ b/drivers/iio/humidity/hts221_i2c.c @@ -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), }, diff --git a/drivers/iio/humidity/hts221_spi.c b/drivers/iio/humidity/hts221_spi.c index 70df5e7150c1..57cbc256771b 100644 --- a/drivers/iio/humidity/hts221_spi.c +++ b/drivers/iio/humidity/hts221_spi.c @@ -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, |