On 01/10/15 15:13, Ludovic Tancerel wrote: > Support for TSYS02D temperature sensor > > Signed-off-by: Ludovic Tancerel <ludovic.tancerel@xxxxxxxxxxxxxxxxx> Applied. > --- > Documentation/ABI/testing/sysfs-bus-iio-meas-spec | 7 + > drivers/iio/temperature/Kconfig | 11 ++ > drivers/iio/temperature/Makefile | 1 + > drivers/iio/temperature/tsys02d.c | 191 ++++++++++++++++++++++ > 4 files changed, 210 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-meas-spec > create mode 100644 drivers/iio/temperature/tsys02d.c > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio-meas-spec b/Documentation/ABI/testing/sysfs-bus-iio-meas-spec > new file mode 100644 > index 0000000..6d47e54 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-bus-iio-meas-spec > @@ -0,0 +1,7 @@ > +What: /sys/bus/iio/devices/iio:deviceX/battery_low > +KernelVersion: 4.1.0 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Reading returns either '1' or '0'. '1' means that the > + battery level supplied to sensor is below 2.25V. > + This ABI is available for tsys02d, htu21, ms8607 > diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig > index 35712032..c4664e5 100644 > --- a/drivers/iio/temperature/Kconfig > +++ b/drivers/iio/temperature/Kconfig > @@ -34,4 +34,15 @@ config TSYS01 > This driver can also be built as a module. If so, the module will > be called tsys01. > > +config TSYS02D > + tristate "Measurement Specialties TSYS02D temperature sensor" > + depends on I2C > + select IIO_MS_SENSORS_I2C > + help > + If you say yes here you get support for the Measurement Specialties > + TSYS02D temperature sensor. > + > + This driver can also be built as a module. If so, the module will > + be called tsys02d. > + > endmenu > diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile > index 368a2a2..02bc79d 100644 > --- a/drivers/iio/temperature/Makefile > +++ b/drivers/iio/temperature/Makefile > @@ -5,3 +5,4 @@ > obj-$(CONFIG_MLX90614) += mlx90614.o > obj-$(CONFIG_TMP006) += tmp006.o > obj-$(CONFIG_TSYS01) += tsys01.o > +obj-$(CONFIG_TSYS02D) += tsys02d.o > diff --git a/drivers/iio/temperature/tsys02d.c b/drivers/iio/temperature/tsys02d.c > new file mode 100644 > index 0000000..2618d42 > --- /dev/null > +++ b/drivers/iio/temperature/tsys02d.c > @@ -0,0 +1,191 @@ > +/* > + * tsys02d.c - Support for Measurement-Specialties tsys02d temperature sensor > + * > + * Copyright (c) 2015 Measurement-Specialties > + * > + * Licensed under the GPL-2. > + * > + * (7-bit I2C slave address 0x40) > + * > + * Datasheet: > + * http://www.meas-spec.com/downloads/Digital_Sensor_TSYS02D.pdf > + */ > + > +#include <linux/init.h> > +#include <linux/device.h> > +#include <linux/kernel.h> > +#include <linux/stat.h> > +#include <linux/module.h> > +#include <linux/iio/iio.h> > +#include <linux/iio/sysfs.h> > + > +#include "../common/ms_sensors/ms_sensors_i2c.h" > + > +#define TSYS02D_RESET 0xFE > + > +static const int tsys02d_samp_freq[4] = { 20, 40, 70, 140 }; > +/* String copy of the above const for readability purpose */ > +static const char tsys02d_show_samp_freq[] = "20 40 70 140"; > + > +static int tsys02d_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *channel, int *val, > + int *val2, long mask) > +{ > + int ret; > + s32 temperature; > + struct ms_ht_dev *dev_data = iio_priv(indio_dev); > + > + switch (mask) { > + case IIO_CHAN_INFO_PROCESSED: > + switch (channel->type) { > + case IIO_TEMP: /* in milli °C */ > + ret = ms_sensors_ht_read_temperature(dev_data, > + &temperature); > + if (ret) > + return ret; > + *val = temperature; > + > + return IIO_VAL_INT; > + default: > + return -EINVAL; > + } > + case IIO_CHAN_INFO_SAMP_FREQ: > + *val = tsys02d_samp_freq[dev_data->res_index]; > + > + return IIO_VAL_INT; > + default: > + return -EINVAL; > + } > +} > + > +static int tsys02d_write_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int val, int val2, long mask) > +{ > + struct ms_ht_dev *dev_data = iio_priv(indio_dev); > + int i, ret; > + > + switch (mask) { > + case IIO_CHAN_INFO_SAMP_FREQ: > + i = ARRAY_SIZE(tsys02d_samp_freq); > + while (i-- > 0) > + if (val == tsys02d_samp_freq[i]) > + break; > + if (i < 0) > + return -EINVAL; > + mutex_lock(&dev_data->lock); > + dev_data->res_index = i; > + ret = ms_sensors_write_resolution(dev_data, i); > + mutex_unlock(&dev_data->lock); > + > + return ret; > + default: > + return -EINVAL; > + } > +} > + > +static const struct iio_chan_spec tsys02d_channels[] = { > + { > + .type = IIO_TEMP, > + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_PROCESSED), > + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), > + } > +}; > + > +static ssize_t tsys02_read_battery_low(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(dev); > + struct ms_ht_dev *dev_data = iio_priv(indio_dev); > + > + return ms_sensors_show_battery_low(dev_data, buf); > +} > + > +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(tsys02d_show_samp_freq); > +static IIO_DEVICE_ATTR(battery_low, S_IRUGO, > + tsys02_read_battery_low, NULL, 0); > + > +static struct attribute *tsys02d_attributes[] = { > + &iio_const_attr_sampling_frequency_available.dev_attr.attr, > + &iio_dev_attr_battery_low.dev_attr.attr, > + NULL, > +}; > + > +static const struct attribute_group tsys02d_attribute_group = { > + .attrs = tsys02d_attributes, > +}; > + > +static const struct iio_info tsys02d_info = { > + .read_raw = tsys02d_read_raw, > + .write_raw = tsys02d_write_raw, > + .attrs = &tsys02d_attribute_group, > + .driver_module = THIS_MODULE, > +}; > + > +int tsys02d_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct ms_ht_dev *dev_data; > + struct iio_dev *indio_dev; > + int ret; > + u64 serial_number; > + > + if (!i2c_check_functionality(client->adapter, > + I2C_FUNC_SMBUS_WRITE_BYTE_DATA | > + I2C_FUNC_SMBUS_WRITE_BYTE | > + I2C_FUNC_SMBUS_READ_I2C_BLOCK)) { > + dev_err(&client->dev, > + "Adapter does not support some i2c transaction\n"); > + return -ENODEV; > + } > + > + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*dev_data)); > + if (!indio_dev) > + return -ENOMEM; > + > + dev_data = iio_priv(indio_dev); > + dev_data->client = client; > + dev_data->res_index = 0; > + mutex_init(&dev_data->lock); > + > + indio_dev->info = &tsys02d_info; > + indio_dev->name = id->name; > + indio_dev->dev.parent = &client->dev; > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->channels = tsys02d_channels; > + indio_dev->num_channels = ARRAY_SIZE(tsys02d_channels); > + > + i2c_set_clientdata(client, indio_dev); > + > + ret = ms_sensors_reset(client, TSYS02D_RESET, 15000); > + if (ret) > + return ret; > + > + ret = ms_sensors_read_serial(client, &serial_number); > + if (ret) > + return ret; > + dev_info(&client->dev, "Serial number : %llx", serial_number); > + > + return devm_iio_device_register(&client->dev, indio_dev); > +} > + > +static const struct i2c_device_id tsys02d_id[] = { > + {"tsys02d", 0}, > + {} > +}; > + > +static struct i2c_driver tsys02d_driver = { > + .probe = tsys02d_probe, > + .id_table = tsys02d_id, > + .driver = { > + .name = "tsys02d", > + }, > +}; > + > +module_i2c_driver(tsys02d_driver); > + > +MODULE_DESCRIPTION("Measurement-Specialties tsys02d temperature driver"); > +MODULE_AUTHOR("William Markezana <william.markezana@xxxxxxxxxxxxx>"); > +MODULE_AUTHOR("Ludovic Tancerel <ludovic.tancerel@xxxxxxxxxxxxxxxxx>"); > +MODULE_LICENSE("GPL v2"); > -- 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
