Add implementation for Hoperf TH06 Humidity and Temperature sensor driver. Datasheet: http://www.hoperf.com/upload/sensor/TH06_Module_v01.pdf Signed-off-by: Cristina Moraru <cristina.moraru09@xxxxxxxxx> --- drivers/iio/humidity/Kconfig | 10 +++ drivers/iio/humidity/Makefile | 1 + drivers/iio/humidity/th06.c | 147 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 158 insertions(+) create mode 100644 drivers/iio/humidity/th06.c diff --git a/drivers/iio/humidity/Kconfig b/drivers/iio/humidity/Kconfig index 6a23698..b233b16 100644 --- a/drivers/iio/humidity/Kconfig +++ b/drivers/iio/humidity/Kconfig @@ -55,4 +55,14 @@ config SI7020 To compile this driver as a module, choose M here: the module will be called si7020. +config TH06 + tristate "TH06 humidity and temperature sensor" + depends on I2C + help + Say yes here to build support for the TH06 measurement of + relative humidity and temperature. + + To compile this driver as a module, choose M here: the module + will be called th06. + endmenu diff --git a/drivers/iio/humidity/Makefile b/drivers/iio/humidity/Makefile index c9f089a..3667ee7 100644 --- a/drivers/iio/humidity/Makefile +++ b/drivers/iio/humidity/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_HDC100X) += hdc100x.o obj-$(CONFIG_HTU21) += htu21.o obj-$(CONFIG_SI7005) += si7005.o obj-$(CONFIG_SI7020) += si7020.o +obj-$(CONFIG_TH06) += th06.o diff --git a/drivers/iio/humidity/th06.c b/drivers/iio/humidity/th06.c new file mode 100644 index 0000000..44b0d77 --- /dev/null +++ b/drivers/iio/humidity/th06.c @@ -0,0 +1,147 @@ +/* + * TH06 - I2C Humidity and Temperature Sensor + * + * Copyright (C) 2016 Cristina Moraru <cristina.moraru09@xxxxxxxxx> + * + * This file is subject to the terms and conditions of version 2 of + * the GNU General Public License. See the file COPYING in the main + * directory of this archive for more details. + * + * IIO driver for TH06 (7-bit I2C slave address 0x40) + * + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> + +#define TH06_DRV_NAME "th06" + +#define TH06_READ_RH 0xE5 +#define TH06_READ_TEMP 0xE3 + +struct th06_data { + struct i2c_client *client; +}; + +static const struct iio_chan_spec th06_channels[] = { + { + .type = IIO_HUMIDITYRELATIVE, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + }, + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + } +}; + +static int th06_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct th06_data *data = iio_priv(indio_dev); + int ret = -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_HUMIDITYRELATIVE: + ret = i2c_smbus_read_word_swapped(data->client, + TH06_READ_RH); + break; + case IIO_TEMP: + ret = i2c_smbus_read_word_swapped(data->client, + TH06_READ_TEMP); + break; + default: + break; + } + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_HUMIDITYRELATIVE: + *val = 0; + *val2 = 1907349; + break; + case IIO_TEMP: + *val = 0; + *val2 = 2681274; + break; + default: + break; + } + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_OFFSET: + switch (chan->type) { + case IIO_HUMIDITYRELATIVE: + *val = -6; + return IIO_VAL_INT; + case IIO_TEMP: + *val = -46; + *val2 = 850000; + return IIO_VAL_INT_PLUS_MICRO; + default: + break; + } + } + return ret; +} + + +static const struct iio_info th06_info = { + .driver_module = THIS_MODULE, + .read_raw = th06_read_raw, +}; + +static int th06_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct th06_data *data; + struct iio_dev *indio_dev; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + + indio_dev->dev.parent = &client->dev; + indio_dev->info = &th06_info; + indio_dev->name = TH06_DRV_NAME; + indio_dev->channels = th06_channels; + indio_dev->num_channels = ARRAY_SIZE(th06_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct i2c_device_id th06_id[] = { + {"th06", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, th06_id); + +static struct i2c_driver th06_driver = { + .driver = { + .name = TH06_DRV_NAME, + }, + .probe = th06_probe, + .id_table = th06_id, +}; + +module_i2c_driver(th06_driver); + +MODULE_AUTHOR("Cristina Moraru <cristina.moraru09@xxxxxxxxx>"); +MODULE_DESCRIPTION("TH06 Humidity and Temperature Sensor"); +MODULE_LICENSE("GPL"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
