diff options
Diffstat (limited to 'drivers/iio/pressure')
| -rw-r--r-- | drivers/iio/pressure/bmp280.c | 66 |
1 files changed, 62 insertions, 4 deletions
diff --git a/drivers/iio/pressure/bmp280.c b/drivers/iio/pressure/bmp280.c index 77172f047f61..f5d0875d88e9 100644 --- a/drivers/iio/pressure/bmp280.c +++ b/drivers/iio/pressure/bmp280.c @@ -24,6 +24,7 @@ #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> /* BMP280 specific registers */ #define BMP280_REG_HUMIDITY_LSB 0xFE @@ -124,6 +125,9 @@ struct bmp280_data { struct mutex lock; struct regmap *regmap; const struct bmp280_chip_info *chip_info; + struct regulator *vddd; + struct regulator *vdda; + unsigned int start_up_time; /* in milliseconds */ /* log of base 2 of oversampling rate */ u8 oversampling_press; @@ -1047,12 +1051,14 @@ static int bmp280_probe(struct i2c_client *client, data->chip_info = &bmp180_chip_info; data->oversampling_press = ilog2(8); data->oversampling_temp = ilog2(1); + data->start_up_time = 10; break; case BMP280_CHIP_ID: indio_dev->num_channels = 2; data->chip_info = &bmp280_chip_info; data->oversampling_press = ilog2(16); data->oversampling_temp = ilog2(2); + data->start_up_time = 2; break; case BME280_CHIP_ID: indio_dev->num_channels = 3; @@ -1060,11 +1066,37 @@ static int bmp280_probe(struct i2c_client *client, data->oversampling_press = ilog2(16); data->oversampling_humid = ilog2(16); data->oversampling_temp = ilog2(2); + data->start_up_time = 2; break; default: return -EINVAL; } + /* Bring up regulators */ + data->vddd = devm_regulator_get(&client->dev, "vddd"); + if (IS_ERR(data->vddd)) { + dev_err(&client->dev, "failed to get VDDD regulator\n"); + return PTR_ERR(data->vddd); + } + ret = regulator_enable(data->vddd); + if (ret) { + dev_err(&client->dev, "failed to enable VDDD regulator\n"); + return ret; + } + data->vdda = devm_regulator_get(&client->dev, "vdda"); + if (IS_ERR(data->vdda)) { + dev_err(&client->dev, "failed to get VDDA regulator\n"); + ret = PTR_ERR(data->vddd); + goto out_disable_vddd; + } + ret = regulator_enable(data->vdda); + if (ret) { + dev_err(&client->dev, "failed to enable VDDA regulator\n"); + goto out_disable_vddd; + } + /* Wait to make sure we started up properly */ + mdelay(data->start_up_time); + /* Bring chip out of reset if there is an assigned GPIO line */ gpiod = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH); /* Deassert the signal */ @@ -1077,7 +1109,8 @@ static int bmp280_probe(struct i2c_client *client, data->chip_info->regmap_config); if (IS_ERR(data->regmap)) { dev_err(&client->dev, "failed to allocate register map\n"); - return PTR_ERR(data->regmap); + ret = PTR_ERR(data->regmap); + goto out_disable_vdda; } ret = regmap_read(data->regmap, BMP280_REG_ID, &chip_id); @@ -1086,14 +1119,38 @@ static int bmp280_probe(struct i2c_client *client, if (chip_id != id->driver_data) { dev_err(&client->dev, "bad chip id. expected %lx got %x\n", id->driver_data, chip_id); - return -EINVAL; + ret = -EINVAL; + goto out_disable_vdda; } ret = data->chip_info->chip_config(data); if (ret < 0) - return ret; + goto out_disable_vdda; - return devm_iio_device_register(&client->dev, indio_dev); + i2c_set_clientdata(client, indio_dev); + + ret = iio_device_register(indio_dev); + if (ret) + goto out_disable_vdda; + + return 0; + +out_disable_vdda: + regulator_disable(data->vdda); +out_disable_vddd: + regulator_disable(data->vddd); + return ret; +} + +static int bmp280_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct bmp280_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + regulator_disable(data->vdda); + regulator_disable(data->vddd); + return 0; } static const struct acpi_device_id bmp280_acpi_match[] = { @@ -1134,6 +1191,7 @@ static struct i2c_driver bmp280_driver = { .of_match_table = of_match_ptr(bmp280_of_match), }, .probe = bmp280_probe, + .remove = bmp280_remove, .id_table = bmp280_id, }; module_i2c_driver(bmp280_driver); |