From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35B65C433EF for ; Sat, 25 Sep 2021 15:30:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6BC7861151 for ; Sat, 25 Sep 2021 15:30:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240372AbhIYPc0 (ORCPT ); Sat, 25 Sep 2021 11:32:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:54546 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234075AbhIYPcZ (ORCPT ); Sat, 25 Sep 2021 11:32:25 -0400 Received: from jic23-huawei (cpc108967-cmbg20-2-0-cust86.5-4.cable.virginm.net [81.101.6.87]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A1081610FD; Sat, 25 Sep 2021 15:30:48 +0000 (UTC) Date: Sat, 25 Sep 2021 16:34:37 +0100 From: Jonathan Cameron To: Jacopo Mondi Cc: Lars-Peter Clausen , Andy Shevchenko , Matt Ranostay , Magnus Damm , Peter Rosin , linux-iio@vger.kernel.org, Jacopo Mondi , Wolfram Sang Subject: Re: [PATCH v6 3/4] iio: chemical: Add Senseair Sunrise 006-0-007 driver Message-ID: <20210925163437.1c364048@jic23-huawei> In-Reply-To: <20210920135413.140310-4-jacopo+renesas@jmondi.org> References: <20210920135413.140310-1-jacopo+renesas@jmondi.org> <20210920135413.140310-4-jacopo+renesas@jmondi.org> X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.30; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org On Mon, 20 Sep 2021 15:54:12 +0200 Jacopo Mondi wrote: > From: Jacopo Mondi > > Add support for the Senseair Sunrise 006-0-0007 driver through the > IIO subsystem. > > Datasheet: https://rmtplusstoragesenseair.blob.core.windows.net/docs/Dev/publicerat/TDE5531.pdf > Signed-off-by: Jacopo Mondi Hi Jacopo, One thing I noticed on a final read through is you have a bunch of buffer mode related stuff specified for the channels. I'll drop that whilst applying but please check the tested branch of iio.git to make sure I didn't mess it up. thanks, Jonathan > --- > v5->v6: > - Apply style fixes from Andy > - Apply Jonathan suggestion and reduce sysfs attribute critical section > - Address Peter's comments on the regmap ops: > - Do not use SMBUS_QUICK as it's supported by few adapters > - Make protocol mangling optional > - Insert a 'wake up' delay between the wake up message and the transaction > - Check for the adapter's required functionalities > --- > MAINTAINERS | 7 + > drivers/iio/chemical/Kconfig | 10 + > drivers/iio/chemical/Makefile | 1 + > drivers/iio/chemical/sunrise_co2.c | 551 +++++++++++++++++++++++++++++ > 4 files changed, 569 insertions(+) > create mode 100644 drivers/iio/chemical/sunrise_co2.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index d7b4f32875a9..4f39e0d65e6d 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -16723,6 +16723,13 @@ S: Maintained > F: drivers/misc/phantom.c > F: include/uapi/linux/phantom.h > > +SENSEAIR SUNRISE 006-0-0007 > +M: Jacopo Mondi > +S: Maintained > +F: Documentation/ABI/testing/sysfs-bus-iio-chemical-sunrise-co2 > +F: Documentation/devicetree/bindings/iio/chemical/senseair,sunrise.yaml > +F: drivers/iio/chemical/sunrise_co2.c > + > SENSIRION SCD30 CARBON DIOXIDE SENSOR DRIVER > M: Tomasz Duszynski > S: Maintained > diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig > index a4920646e9be..5155ab2caed4 100644 > --- a/drivers/iio/chemical/Kconfig > +++ b/drivers/iio/chemical/Kconfig > @@ -159,6 +159,16 @@ config SPS30_SERIAL > To compile this driver as a module, choose M here: the module will > be called sps30_serial. > > +config SENSEAIR_SUNRISE_CO2 > + tristate "Senseair Sunrise 006-0-0007 CO2 sensor" > + select REGMAP_I2C > + help > + Say yes here to build support for Senseair Sunrise 006-0-0007 CO2 > + sensor. > + > + To compile this driver as a module, choose M here: the > + module will be called sunrise_co2. > + > config VZ89X > tristate "SGX Sensortech MiCS VZ89X VOC sensor" > depends on I2C > diff --git a/drivers/iio/chemical/Makefile b/drivers/iio/chemical/Makefile > index 4898690cc155..61e8749a84f3 100644 > --- a/drivers/iio/chemical/Makefile > +++ b/drivers/iio/chemical/Makefile > @@ -15,6 +15,7 @@ obj-$(CONFIG_PMS7003) += pms7003.o > obj-$(CONFIG_SCD30_CORE) += scd30_core.o > obj-$(CONFIG_SCD30_I2C) += scd30_i2c.o > obj-$(CONFIG_SCD30_SERIAL) += scd30_serial.o > +obj-$(CONFIG_SENSEAIR_SUNRISE_CO2) += sunrise_co2.o > obj-$(CONFIG_SENSIRION_SGP30) += sgp30.o > obj-$(CONFIG_SPS30) += sps30.o > obj-$(CONFIG_SPS30_I2C) += sps30_i2c.o > diff --git a/drivers/iio/chemical/sunrise_co2.c b/drivers/iio/chemical/sunrise_co2.c > new file mode 100644 > index 000000000000..a896561a98fa > --- /dev/null > +++ b/drivers/iio/chemical/sunrise_co2.c > @@ -0,0 +1,551 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Senseair Sunrise 006-0-0007 CO2 sensor driver. > + * > + * Copyright (C) 2021 Jacopo Mondi > + * > + * List of features not yet supported by the driver: > + * - controllable EN pin > + * - single-shot operations using the nDRY pin. > + * - ABC/target calibration > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > + > +#define DRIVER_NAME "sunrise_co2" > + > +#define SUNRISE_ERROR_STATUS_REG 0x00 > +#define SUNRISE_CO2_FILTERED_COMP_REG 0x06 > +#define SUNRISE_CHIP_TEMPERATURE_REG 0x08 > +#define SUNRISE_CALIBRATION_STATUS_REG 0x81 > +#define SUNRISE_CALIBRATION_COMMAND_REG 0x82 > +#define SUNRISE_CALIBRATION_FACTORY_CMD 0x7c02 > +#define SUNRISE_CALIBRATION_BACKGROUND_CMD 0x7c06 > +/* > + * The calibration timeout is not characterized in the datasheet. > + * Use 30 seconds as a reasonable upper limit. > + */ > +#define SUNRISE_CALIBRATION_TIMEOUT_US (30 * USEC_PER_SEC) > + > +struct sunrise_dev { > + struct i2c_client *client; > + struct regmap *regmap; > + /* Protects access to IIO attributes. */ > + struct mutex lock; > + bool ignore_nak; > +}; > + > +/* Custom regmap read/write operations: perform unlocked access to the i2c bus. */ > + > +static int sunrise_regmap_read(void *context, const void *reg_buf, > + size_t reg_size, void *val_buf, size_t val_size) > +{ > + struct i2c_client *client = context; > + struct sunrise_dev *sunrise = i2c_get_clientdata(client); > + union i2c_smbus_data data; > + int ret; > + > + if (reg_size != 1 || !val_size) > + return -EINVAL; > + > + memset(&data, 0, sizeof(data)); > + data.block[0] = val_size; > + > + /* > + * Wake up sensor by sending sensor address: START, sensor address, > + * STOP. Sensor will not ACK this byte. > + * > + * The chip enters a low power state after 15ms without > + * communications or after a complete read/write sequence. > + */ > + __i2c_smbus_xfer(client->adapter, client->addr, > + sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0, > + I2C_SMBUS_WRITE, 0, I2C_SMBUS_BYTE_DATA, &data); > + > + usleep_range(500, 1500); > + > + ret = __i2c_smbus_xfer(client->adapter, client->addr, client->flags, > + I2C_SMBUS_READ, ((u8 *)reg_buf)[0], > + I2C_SMBUS_I2C_BLOCK_DATA, &data); > + if (ret < 0) > + return ret; > + > + memcpy(val_buf, &data.block[1], data.block[0]); > + > + return 0; > +} > + > +static int sunrise_regmap_write(void *context, const void *val_buf, size_t count) > +{ > + struct i2c_client *client = context; > + struct sunrise_dev *sunrise = i2c_get_clientdata(client); > + union i2c_smbus_data data; > + > + /* Discard reg address from values count. */ > + if (!count) > + return -EINVAL; > + count--; > + > + memset(&data, 0, sizeof(data)); > + data.block[0] = count; > + memcpy(&data.block[1], (u8 *)val_buf + 1, count); > + > + __i2c_smbus_xfer(client->adapter, client->addr, > + sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0, > + I2C_SMBUS_WRITE, 0, I2C_SMBUS_BYTE_DATA, &data); > + > + usleep_range(500, 1500); > + > + return __i2c_smbus_xfer(client->adapter, client->addr, client->flags, > + I2C_SMBUS_WRITE, ((u8 *)val_buf)[0], > + I2C_SMBUS_I2C_BLOCK_DATA, &data); > +} > + > +/* > + * Sunrise i2c read/write operations: lock the i2c segment to avoid losing the > + * wake up session. Use custom regmap operations that perform unlocked access to > + * the i2c bus. > + */ > +static int sunrise_read_byte(struct sunrise_dev *sunrise, u8 reg) > +{ > + const struct i2c_client *client = sunrise->client; > + const struct device *dev = &client->dev; > + unsigned int val; > + int ret; > + > + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); > + ret = regmap_read(sunrise->regmap, reg, &val); > + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); > + if (ret) { > + dev_err(dev, "Read byte failed: reg 0x%02x (%d)\n", reg, ret); > + return ret; > + } > + > + return val; > +} > + > +static int sunrise_read_word(struct sunrise_dev *sunrise, u8 reg, u16 *val) > +{ > + const struct i2c_client *client = sunrise->client; > + const struct device *dev = &client->dev; > + __be16 be_val; > + int ret; > + > + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); > + ret = regmap_bulk_read(sunrise->regmap, reg, &be_val, sizeof(be_val)); > + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); > + if (ret) { > + dev_err(dev, "Read word failed: reg 0x%02x (%d)\n", reg, ret); > + return ret; > + } > + > + *val = be16_to_cpu(be_val); > + > + return 0; > +} > + > +static int sunrise_write_byte(struct sunrise_dev *sunrise, u8 reg, u8 val) > +{ > + const struct i2c_client *client = sunrise->client; > + const struct device *dev = &client->dev; > + int ret; > + > + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); > + ret = regmap_write(sunrise->regmap, reg, val); > + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); > + if (ret) > + dev_err(dev, "Write byte failed: reg 0x%02x (%d)\n", reg, ret); > + > + return ret; > +} > + > +static int sunrise_write_word(struct sunrise_dev *sunrise, u8 reg, u16 data) > +{ > + const struct i2c_client *client = sunrise->client; > + const struct device *dev = &client->dev; > + __be16 be_data = cpu_to_be16(data); > + int ret; > + > + i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); > + ret = regmap_bulk_write(sunrise->regmap, reg, &be_data, sizeof(be_data)); > + i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); > + if (ret) > + dev_err(dev, "Write word failed: reg 0x%02x (%d)\n", reg, ret); > + > + return ret; > +} > + > +/* Trigger a calibration cycle. */ > + > +enum { > + SUNRISE_CALIBRATION_FACTORY, > + SUNRISE_CALIBRATION_BACKGROUND, > +}; > + > +static const struct sunrise_calib_data { > + u16 cmd; > + u8 bit; > + const char * const name; > +} calib_data[] = { > + [SUNRISE_CALIBRATION_FACTORY] = { > + SUNRISE_CALIBRATION_FACTORY_CMD, > + BIT(2), > + "factory_calibration", > + }, > + [SUNRISE_CALIBRATION_BACKGROUND] = { > + SUNRISE_CALIBRATION_BACKGROUND_CMD, > + BIT(5), > + "background_calibration", > + }, > +}; > + > +static int sunrise_calibrate(struct sunrise_dev *sunrise, > + const struct sunrise_calib_data *data) > +{ > + unsigned int status; > + int ret; > + > + /* Reset the calibration status reg. */ > + ret = sunrise_write_byte(sunrise, SUNRISE_CALIBRATION_STATUS_REG, 0x00); > + if (ret) > + return ret; > + > + /* Write a calibration command and poll the calibration status bit. */ > + ret = sunrise_write_word(sunrise, SUNRISE_CALIBRATION_COMMAND_REG, data->cmd); > + if (ret) > + return ret; > + > + dev_dbg(&sunrise->client->dev, "%s in progress\n", data->name); > + > + /* > + * Calibration takes several seconds, so the sleep time between reads > + * can be pretty relaxed. > + */ > + return read_poll_timeout(sunrise_read_byte, status, status & data->bit, > + 200000, SUNRISE_CALIBRATION_TIMEOUT_US, false, > + sunrise, SUNRISE_CALIBRATION_STATUS_REG); > +} > + > +static ssize_t sunrise_cal_factory_write(struct iio_dev *iiodev, > + uintptr_t private, > + const struct iio_chan_spec *chan, > + const char *buf, size_t len) > +{ > + struct sunrise_dev *sunrise = iio_priv(iiodev); > + bool enable; > + int ret; > + > + ret = kstrtobool(buf, &enable); > + if (ret) > + return ret; > + > + if (!enable) > + return len; > + > + mutex_lock(&sunrise->lock); > + ret = sunrise_calibrate(sunrise, &calib_data[SUNRISE_CALIBRATION_FACTORY]); > + mutex_unlock(&sunrise->lock); > + if (ret) > + return ret; > + > + return len; > +} > + > +static ssize_t sunrise_cal_background_write(struct iio_dev *iiodev, > + uintptr_t private, > + const struct iio_chan_spec *chan, > + const char *buf, size_t len) > +{ > + struct sunrise_dev *sunrise = iio_priv(iiodev); > + bool enable; > + int ret; > + > + ret = kstrtobool(buf, &enable); > + if (ret) > + return ret; > + > + if (!enable) > + return len; > + > + mutex_lock(&sunrise->lock); > + ret = sunrise_calibrate(sunrise, &calib_data[SUNRISE_CALIBRATION_BACKGROUND]); > + mutex_unlock(&sunrise->lock); > + if (ret) > + return ret; > + > + return len; > +} > + > + /* Enumerate and retrieve the chip error status. */ > +enum { > + SUNRISE_ERROR_FATAL, > + SUNRISE_ERROR_I2C, > + SUNRISE_ERROR_ALGORITHM, > + SUNRISE_ERROR_CALIBRATION, > + SUNRISE_ERROR_SELF_DIAGNOSTIC, > + SUNRISE_ERROR_OUT_OF_RANGE, > + SUNRISE_ERROR_MEMORY, > + SUNRISE_ERROR_NO_MEASUREMENT, > + SUNRISE_ERROR_LOW_VOLTAGE, > + SUNRISE_ERROR_MEASUREMENT_TIMEOUT, > +}; > + > +static const char * const sunrise_error_statuses[] = { > + [SUNRISE_ERROR_FATAL] = "error_fatal", > + [SUNRISE_ERROR_I2C] = "error_i2c", > + [SUNRISE_ERROR_ALGORITHM] = "error_algorithm", > + [SUNRISE_ERROR_CALIBRATION] = "error_calibration", > + [SUNRISE_ERROR_SELF_DIAGNOSTIC] = "error_self_diagnostic", > + [SUNRISE_ERROR_OUT_OF_RANGE] = "error_out_of_range", > + [SUNRISE_ERROR_MEMORY] = "error_memory", > + [SUNRISE_ERROR_NO_MEASUREMENT] = "error_no_measurement", > + [SUNRISE_ERROR_LOW_VOLTAGE] = "error_low_voltage", > + [SUNRISE_ERROR_MEASUREMENT_TIMEOUT] = "error_measurement_timeout", > +}; > + > +static const struct iio_enum sunrise_error_statuses_enum = { > + .items = sunrise_error_statuses, > + .num_items = ARRAY_SIZE(sunrise_error_statuses), > +}; > + > +static ssize_t sunrise_error_status_read(struct iio_dev *iiodev, > + uintptr_t private, > + const struct iio_chan_spec *chan, > + char *buf) > +{ > + struct sunrise_dev *sunrise = iio_priv(iiodev); > + unsigned long errors; > + ssize_t len = 0; > + u16 value; > + int ret; > + u8 i; > + > + mutex_lock(&sunrise->lock); > + ret = sunrise_read_word(sunrise, SUNRISE_ERROR_STATUS_REG, &value); > + if (ret) { > + mutex_unlock(&sunrise->lock); > + return ret; > + } > + > + errors = value; > + for_each_set_bit(i, &errors, ARRAY_SIZE(sunrise_error_statuses)) > + len += sysfs_emit_at(buf, len, "%s ", sunrise_error_statuses[i]); > + > + if (len) > + buf[len - 1] = '\n'; > + > + mutex_unlock(&sunrise->lock); > + > + return len; > +} > + > +static const struct iio_chan_spec_ext_info sunrise_concentration_ext_info[] = { > + /* Calibration triggers. */ > + { > + .name = "calibration_factory", > + .write = sunrise_cal_factory_write, > + .shared = IIO_SEPARATE, > + }, > + { > + .name = "calibration_background", > + .write = sunrise_cal_background_write, > + .shared = IIO_SEPARATE, > + }, > + > + /* Error statuses. */ > + { > + .name = "error_status", > + .read = sunrise_error_status_read, > + .shared = IIO_SHARED_BY_ALL, > + }, > + { > + .name = "error_status_available", > + .shared = IIO_SHARED_BY_ALL, > + .read = iio_enum_available_read, > + .private = (uintptr_t)&sunrise_error_statuses_enum, > + }, > + {} > +}; > + > +static const struct iio_chan_spec sunrise_channels[] = { > + { > + .type = IIO_CONCENTRATION, > + .modified = 1, > + .channel2 = IIO_MOD_CO2, > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | > + BIT(IIO_CHAN_INFO_SCALE), > + .ext_info = sunrise_concentration_ext_info, > + .scan_index = 0, Not sure how I missed it before now, but we don't need to set scan_index or scan_type if not providing the buffered interface. I'd prefer that we introduce them only alongside that support as otherwise they are just noise. If that's all I find, I'll just drop these whilst applying and ask you to sanity check the result. > + .scan_type = { > + .sign = 's', > + .realbits = 16, > + .storagebits = 16, > + .endianness = IIO_CPU, > + }, > + }, > + { > + .type = IIO_TEMP, > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | > + BIT(IIO_CHAN_INFO_SCALE), > + .scan_index = 1, > + .scan_type = { > + .sign = 's', > + .realbits = 16, > + .storagebits = 16, > + .endianness = IIO_CPU, > + }, > + }, > +}; > + > +static int sunrise_read_raw(struct iio_dev *iio_dev, > + const struct iio_chan_spec *chan, > + int *val, int *val2, long mask) > +{ > + struct sunrise_dev *sunrise = iio_priv(iio_dev); > + u16 value; > + int ret; > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + switch (chan->type) { > + case IIO_CONCENTRATION: > + mutex_lock(&sunrise->lock); > + ret = sunrise_read_word(sunrise, SUNRISE_CO2_FILTERED_COMP_REG, > + &value); > + *val = value; > + mutex_unlock(&sunrise->lock); > + > + if (ret) > + return ret; > + > + return IIO_VAL_INT; > + > + case IIO_TEMP: > + mutex_lock(&sunrise->lock); > + ret = sunrise_read_word(sunrise, SUNRISE_CHIP_TEMPERATURE_REG, > + &value); > + *val = value; > + mutex_unlock(&sunrise->lock); > + > + if (ret) > + return ret; > + > + return IIO_VAL_INT; > + > + default: > + return -EINVAL; > + } > + > + case IIO_CHAN_INFO_SCALE: > + switch (chan->type) { > + case IIO_CONCENTRATION: > + /* > + * 1 / 10^4 to comply with IIO scale for CO2 > + * (percentage). The chip CO2 reading range is [400 - > + * 5000] ppm which corresponds to [0,004 - 0,5] %. > + */ > + *val = 1; > + *val2 = 10000; > + return IIO_VAL_FRACTIONAL; > + > + case IIO_TEMP: > + /* x10 to comply with IIO scale (millidegrees celsius). */ > + *val = 10; > + return IIO_VAL_INT; > + > + default: > + return -EINVAL; > + } > + > + default: > + return -EINVAL; > + } > +} > + > +static const struct iio_info sunrise_info = { > + .read_raw = sunrise_read_raw, > +}; > + > +static const struct regmap_bus sunrise_regmap_bus = { > + .read = sunrise_regmap_read, > + .write = sunrise_regmap_write, > +}; > + > +static const struct regmap_config sunrise_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > +}; > + > +static int sunrise_probe(struct i2c_client *client) > +{ > + struct sunrise_dev *sunrise; > + struct iio_dev *iio_dev; > + > + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA | > + I2C_FUNC_SMBUS_BLOCK_DATA)) { > + dev_err(&client->dev, > + "Adapter does not support required functionalities\n"); > + return -EOPNOTSUPP; > + } > + > + iio_dev = devm_iio_device_alloc(&client->dev, sizeof(*sunrise)); > + if (!iio_dev) > + return -ENOMEM; > + > + sunrise = iio_priv(iio_dev); > + sunrise->client = client; > + mutex_init(&sunrise->lock); > + > + i2c_set_clientdata(client, sunrise); > + > + sunrise->regmap = devm_regmap_init(&client->dev, &sunrise_regmap_bus, > + client, &sunrise_regmap_config); > + if (IS_ERR(sunrise->regmap)) { > + dev_err(&client->dev, "Failed to initialize regmap\n"); > + return PTR_ERR(sunrise->regmap); > + } > + > + /* > + * The chip nacks the wake up message. If the adapter does not support > + * protocol mangling do not set the I2C_M_IGNORE_NAK flag at the expense > + * of possible cruft in the logs. > + */ > + if (i2c_check_functionality(client->adapter, I2C_FUNC_PROTOCOL_MANGLING)) > + sunrise->ignore_nak = true; > + > + iio_dev->info = &sunrise_info; > + iio_dev->name = DRIVER_NAME; > + iio_dev->channels = sunrise_channels; > + iio_dev->num_channels = ARRAY_SIZE(sunrise_channels); > + iio_dev->modes = INDIO_DIRECT_MODE; > + > + return devm_iio_device_register(&client->dev, iio_dev); > +} > + > +static const struct of_device_id sunrise_of_match[] = { > + { .compatible = "senseair,sunrise-006-0-0007" }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, sunrise_of_match); > + > +static struct i2c_driver sunrise_driver = { > + .driver = { > + .name = DRIVER_NAME, > + .of_match_table = sunrise_of_match, > + }, > + .probe_new = sunrise_probe, > +}; > +module_i2c_driver(sunrise_driver); > + > +MODULE_AUTHOR("Jacopo Mondi "); > +MODULE_DESCRIPTION("Senseair Sunrise 006-0-0007 CO2 sensor IIO driver"); > +MODULE_LICENSE("GPL v2"); > -- > 2.32.0 >