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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor)
- *
- * Copyright (C) 2008, 2010 Pengutronix
- *
- * TODO: SPI, use power-down mode for suspend?, interrupt handling?
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/err.h>
- #include <linux/mutex.h>
- #include <linux/jiffies.h>
- #include <linux/i2c.h>
- #include <linux/hwmon.h>
- #include <linux/hwmon-sysfs.h>
- #include <linux/slab.h>
- #define ADT7411_REG_STAT_1 0x00
- #define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0)
- #define ADT7411_STAT_1_INT_TEMP_LOW BIT(1)
- #define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2)
- #define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3)
- #define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4)
- #define ADT7411_STAT_1_AIN2 BIT(5)
- #define ADT7411_STAT_1_AIN3 BIT(6)
- #define ADT7411_STAT_1_AIN4 BIT(7)
- #define ADT7411_REG_STAT_2 0x01
- #define ADT7411_STAT_2_AIN5 BIT(0)
- #define ADT7411_STAT_2_AIN6 BIT(1)
- #define ADT7411_STAT_2_AIN7 BIT(2)
- #define ADT7411_STAT_2_AIN8 BIT(3)
- #define ADT7411_STAT_2_VDD BIT(4)
- #define ADT7411_REG_INT_TEMP_VDD_LSB 0x03
- #define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04
- #define ADT7411_REG_VDD_MSB 0x06
- #define ADT7411_REG_INT_TEMP_MSB 0x07
- #define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08
- #define ADT7411_REG_CFG1 0x18
- #define ADT7411_CFG1_START_MONITOR BIT(0)
- #define ADT7411_CFG1_RESERVED_BIT1 BIT(1)
- #define ADT7411_CFG1_EXT_TDM BIT(2)
- #define ADT7411_CFG1_RESERVED_BIT3 BIT(3)
- #define ADT7411_REG_CFG2 0x19
- #define ADT7411_CFG2_DISABLE_AVG BIT(5)
- #define ADT7411_REG_CFG3 0x1a
- #define ADT7411_CFG3_ADC_CLK_225 BIT(0)
- #define ADT7411_CFG3_RESERVED_BIT1 BIT(1)
- #define ADT7411_CFG3_RESERVED_BIT2 BIT(2)
- #define ADT7411_CFG3_RESERVED_BIT3 BIT(3)
- #define ADT7411_CFG3_REF_VDD BIT(4)
- #define ADT7411_REG_VDD_HIGH 0x23
- #define ADT7411_REG_VDD_LOW 0x24
- #define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr))
- #define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr))
- #define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \
- ? 0x2b + 2 * ((nr)-2) \
- : 0x27)
- #define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \
- ? 0x2c + 2 * ((nr)-2) \
- : 0x28)
- #define ADT7411_REG_DEVICE_ID 0x4d
- #define ADT7411_REG_MANUFACTURER_ID 0x4e
- #define ADT7411_DEVICE_ID 0x2
- #define ADT7411_MANUFACTURER_ID 0x41
- static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
- static const u8 adt7411_in_alarm_reg[] = {
- ADT7411_REG_STAT_2,
- ADT7411_REG_STAT_1,
- ADT7411_REG_STAT_1,
- ADT7411_REG_STAT_1,
- ADT7411_REG_STAT_1,
- ADT7411_REG_STAT_2,
- ADT7411_REG_STAT_2,
- ADT7411_REG_STAT_2,
- ADT7411_REG_STAT_2,
- };
- static const u8 adt7411_in_alarm_bits[] = {
- ADT7411_STAT_2_VDD,
- ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1,
- ADT7411_STAT_1_AIN2,
- ADT7411_STAT_1_AIN3,
- ADT7411_STAT_1_AIN4,
- ADT7411_STAT_2_AIN5,
- ADT7411_STAT_2_AIN6,
- ADT7411_STAT_2_AIN7,
- ADT7411_STAT_2_AIN8,
- };
- struct adt7411_data {
- struct mutex device_lock; /* for "atomic" device accesses */
- struct mutex update_lock;
- unsigned long next_update;
- long vref_cached;
- struct i2c_client *client;
- bool use_ext_temp;
- };
- /*
- * When reading a register containing (up to 4) lsb, all associated
- * msb-registers get locked by the hardware. After _one_ of those msb is read,
- * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb
- * is protected here with a mutex, too.
- */
- static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg,
- u8 msb_reg, u8 lsb_shift)
- {
- struct adt7411_data *data = i2c_get_clientdata(client);
- int val, tmp;
- mutex_lock(&data->device_lock);
- val = i2c_smbus_read_byte_data(client, lsb_reg);
- if (val < 0)
- goto exit_unlock;
- tmp = (val >> lsb_shift) & 3;
- val = i2c_smbus_read_byte_data(client, msb_reg);
- if (val >= 0)
- val = (val << 2) | tmp;
- exit_unlock:
- mutex_unlock(&data->device_lock);
- return val;
- }
- static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
- bool flag)
- {
- struct adt7411_data *data = i2c_get_clientdata(client);
- int ret, val;
- mutex_lock(&data->device_lock);
- ret = i2c_smbus_read_byte_data(client, reg);
- if (ret < 0)
- goto exit_unlock;
- if (flag)
- val = ret | bit;
- else
- val = ret & ~bit;
- ret = i2c_smbus_write_byte_data(client, reg, val);
- exit_unlock:
- mutex_unlock(&data->device_lock);
- return ret;
- }
- static ssize_t adt7411_show_bit(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret = i2c_smbus_read_byte_data(client, attr2->index);
- return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
- }
- static ssize_t adt7411_set_bit(struct device *dev,
- struct device_attribute *attr, const char *buf,
- size_t count)
- {
- struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret;
- unsigned long flag;
- ret = kstrtoul(buf, 0, &flag);
- if (ret || flag > 1)
- return -EINVAL;
- ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag);
- /* force update */
- mutex_lock(&data->update_lock);
- data->next_update = jiffies;
- mutex_unlock(&data->update_lock);
- return ret < 0 ? ret : count;
- }
- #define ADT7411_BIT_ATTR(__name, __reg, __bit) \
- SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \
- adt7411_set_bit, __bit, __reg)
- static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG);
- static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225);
- static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD);
- static struct attribute *adt7411_attrs[] = {
- &sensor_dev_attr_no_average.dev_attr.attr,
- &sensor_dev_attr_fast_sampling.dev_attr.attr,
- &sensor_dev_attr_adc_ref_vdd.dev_attr.attr,
- NULL
- };
- ATTRIBUTE_GROUPS(adt7411);
- static int adt7411_read_in_alarm(struct device *dev, int channel, long *val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret;
- ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]);
- if (ret < 0)
- return ret;
- *val = !!(ret & adt7411_in_alarm_bits[channel]);
- return 0;
- }
- static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret;
- switch (attr) {
- case hwmon_in_input:
- ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
- ADT7411_REG_VDD_MSB, 2);
- if (ret < 0)
- return ret;
- *val = ret * 7000 / 1024;
- return 0;
- case hwmon_in_min:
- ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW);
- if (ret < 0)
- return ret;
- *val = ret * 7000 / 256;
- return 0;
- case hwmon_in_max:
- ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH);
- if (ret < 0)
- return ret;
- *val = ret * 7000 / 256;
- return 0;
- case hwmon_in_alarm:
- return adt7411_read_in_alarm(dev, 0, val);
- default:
- return -EOPNOTSUPP;
- }
- }
- static int adt7411_update_vref(struct device *dev)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int val;
- if (time_after_eq(jiffies, data->next_update)) {
- val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
- if (val < 0)
- return val;
- if (val & ADT7411_CFG3_REF_VDD) {
- val = adt7411_read_in_vdd(dev, hwmon_in_input,
- &data->vref_cached);
- if (val < 0)
- return val;
- } else {
- data->vref_cached = 2250;
- }
- data->next_update = jiffies + HZ;
- }
- return 0;
- }
- static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
- long *val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret;
- int reg, lsb_reg, lsb_shift;
- int nr = channel - 1;
- mutex_lock(&data->update_lock);
- ret = adt7411_update_vref(dev);
- if (ret < 0)
- goto exit_unlock;
- switch (attr) {
- case hwmon_in_input:
- lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2);
- lsb_shift = 2 * (nr & 0x03);
- ret = adt7411_read_10_bit(client, lsb_reg,
- ADT7411_REG_EXT_TEMP_AIN1_MSB + nr,
- lsb_shift);
- if (ret < 0)
- goto exit_unlock;
- *val = ret * data->vref_cached / 1024;
- ret = 0;
- break;
- case hwmon_in_min:
- case hwmon_in_max:
- reg = (attr == hwmon_in_min)
- ? ADT7411_REG_IN_LOW(channel)
- : ADT7411_REG_IN_HIGH(channel);
- ret = i2c_smbus_read_byte_data(client, reg);
- if (ret < 0)
- goto exit_unlock;
- *val = ret * data->vref_cached / 256;
- ret = 0;
- break;
- case hwmon_in_alarm:
- ret = adt7411_read_in_alarm(dev, channel, val);
- break;
- default:
- ret = -EOPNOTSUPP;
- break;
- }
- exit_unlock:
- mutex_unlock(&data->update_lock);
- return ret;
- }
- static int adt7411_read_in(struct device *dev, u32 attr, int channel,
- long *val)
- {
- if (channel == 0)
- return adt7411_read_in_vdd(dev, attr, val);
- else
- return adt7411_read_in_chan(dev, attr, channel, val);
- }
- static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel,
- long *val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret, bit;
- ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1);
- if (ret < 0)
- return ret;
- switch (attr) {
- case hwmon_temp_min_alarm:
- bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW
- : ADT7411_STAT_1_INT_TEMP_LOW;
- break;
- case hwmon_temp_max_alarm:
- bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1
- : ADT7411_STAT_1_INT_TEMP_HIGH;
- break;
- case hwmon_temp_fault:
- bit = ADT7411_STAT_1_EXT_TEMP_FAULT;
- break;
- default:
- return -EOPNOTSUPP;
- }
- *val = !!(ret & bit);
- return 0;
- }
- static int adt7411_read_temp(struct device *dev, u32 attr, int channel,
- long *val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret, reg, regl, regh;
- switch (attr) {
- case hwmon_temp_input:
- regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB :
- ADT7411_REG_INT_TEMP_VDD_LSB;
- regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB :
- ADT7411_REG_INT_TEMP_MSB;
- ret = adt7411_read_10_bit(client, regl, regh, 0);
- if (ret < 0)
- return ret;
- ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */
- *val = ret * 250;
- return 0;
- case hwmon_temp_min:
- case hwmon_temp_max:
- reg = (attr == hwmon_temp_min)
- ? ADT7411_REG_TEMP_LOW(channel)
- : ADT7411_REG_TEMP_HIGH(channel);
- ret = i2c_smbus_read_byte_data(client, reg);
- if (ret < 0)
- return ret;
- ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */
- *val = ret * 1000;
- return 0;
- case hwmon_temp_min_alarm:
- case hwmon_temp_max_alarm:
- case hwmon_temp_fault:
- return adt7411_read_temp_alarm(dev, attr, channel, val);
- default:
- return -EOPNOTSUPP;
- }
- }
- static int adt7411_read(struct device *dev, enum hwmon_sensor_types type,
- u32 attr, int channel, long *val)
- {
- switch (type) {
- case hwmon_in:
- return adt7411_read_in(dev, attr, channel, val);
- case hwmon_temp:
- return adt7411_read_temp(dev, attr, channel, val);
- default:
- return -EOPNOTSUPP;
- }
- }
- static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int reg;
- val = clamp_val(val, 0, 255 * 7000 / 256);
- val = DIV_ROUND_CLOSEST(val * 256, 7000);
- switch (attr) {
- case hwmon_in_min:
- reg = ADT7411_REG_VDD_LOW;
- break;
- case hwmon_in_max:
- reg = ADT7411_REG_VDD_HIGH;
- break;
- default:
- return -EOPNOTSUPP;
- }
- return i2c_smbus_write_byte_data(client, reg, val);
- }
- static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel,
- long val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int ret, reg;
- mutex_lock(&data->update_lock);
- ret = adt7411_update_vref(dev);
- if (ret < 0)
- goto exit_unlock;
- val = clamp_val(val, 0, 255 * data->vref_cached / 256);
- val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached);
- switch (attr) {
- case hwmon_in_min:
- reg = ADT7411_REG_IN_LOW(channel);
- break;
- case hwmon_in_max:
- reg = ADT7411_REG_IN_HIGH(channel);
- break;
- default:
- ret = -EOPNOTSUPP;
- goto exit_unlock;
- }
- ret = i2c_smbus_write_byte_data(client, reg, val);
- exit_unlock:
- mutex_unlock(&data->update_lock);
- return ret;
- }
- static int adt7411_write_in(struct device *dev, u32 attr, int channel,
- long val)
- {
- if (channel == 0)
- return adt7411_write_in_vdd(dev, attr, val);
- else
- return adt7411_write_in_chan(dev, attr, channel, val);
- }
- static int adt7411_write_temp(struct device *dev, u32 attr, int channel,
- long val)
- {
- struct adt7411_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- int reg;
- val = clamp_val(val, -128000, 127000);
- val = DIV_ROUND_CLOSEST(val, 1000);
- switch (attr) {
- case hwmon_temp_min:
- reg = ADT7411_REG_TEMP_LOW(channel);
- break;
- case hwmon_temp_max:
- reg = ADT7411_REG_TEMP_HIGH(channel);
- break;
- default:
- return -EOPNOTSUPP;
- }
- return i2c_smbus_write_byte_data(client, reg, val);
- }
- static int adt7411_write(struct device *dev, enum hwmon_sensor_types type,
- u32 attr, int channel, long val)
- {
- switch (type) {
- case hwmon_in:
- return adt7411_write_in(dev, attr, channel, val);
- case hwmon_temp:
- return adt7411_write_temp(dev, attr, channel, val);
- default:
- return -EOPNOTSUPP;
- }
- }
- static umode_t adt7411_is_visible(const void *_data,
- enum hwmon_sensor_types type,
- u32 attr, int channel)
- {
- const struct adt7411_data *data = _data;
- bool visible;
- switch (type) {
- case hwmon_in:
- visible = channel == 0 || channel >= 3 || !data->use_ext_temp;
- switch (attr) {
- case hwmon_in_input:
- case hwmon_in_alarm:
- return visible ? S_IRUGO : 0;
- case hwmon_in_min:
- case hwmon_in_max:
- return visible ? S_IRUGO | S_IWUSR : 0;
- }
- break;
- case hwmon_temp:
- visible = channel == 0 || data->use_ext_temp;
- switch (attr) {
- case hwmon_temp_input:
- case hwmon_temp_min_alarm:
- case hwmon_temp_max_alarm:
- case hwmon_temp_fault:
- return visible ? S_IRUGO : 0;
- case hwmon_temp_min:
- case hwmon_temp_max:
- return visible ? S_IRUGO | S_IWUSR : 0;
- }
- break;
- default:
- break;
- }
- return 0;
- }
- static int adt7411_detect(struct i2c_client *client,
- struct i2c_board_info *info)
- {
- int val;
- if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- return -ENODEV;
- val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID);
- if (val < 0 || val != ADT7411_MANUFACTURER_ID) {
- dev_dbg(&client->dev,
- "Wrong manufacturer ID. Got %d, expected %d\n",
- val, ADT7411_MANUFACTURER_ID);
- return -ENODEV;
- }
- val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID);
- if (val < 0 || val != ADT7411_DEVICE_ID) {
- dev_dbg(&client->dev,
- "Wrong device ID. Got %d, expected %d\n",
- val, ADT7411_DEVICE_ID);
- return -ENODEV;
- }
- strscpy(info->type, "adt7411", I2C_NAME_SIZE);
- return 0;
- }
- static int adt7411_init_device(struct adt7411_data *data)
- {
- int ret;
- u8 val;
- ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3);
- if (ret < 0)
- return ret;
- /*
- * We must only write zero to bit 1 and bit 2 and only one to bit 3
- * according to the datasheet.
- */
- val = ret;
- val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2);
- val |= ADT7411_CFG3_RESERVED_BIT3;
- ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val);
- if (ret < 0)
- return ret;
- ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1);
- if (ret < 0)
- return ret;
- data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM;
- /*
- * We must only write zero to bit 1 and only one to bit 3 according to
- * the datasheet.
- */
- val = ret;
- val &= ~ADT7411_CFG1_RESERVED_BIT1;
- val |= ADT7411_CFG1_RESERVED_BIT3;
- /* enable monitoring */
- val |= ADT7411_CFG1_START_MONITOR;
- return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val);
- }
- static const struct hwmon_channel_info *adt7411_info[] = {
- HWMON_CHANNEL_INFO(in,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
- HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM),
- HWMON_CHANNEL_INFO(temp,
- HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
- HWMON_T_MAX | HWMON_T_MAX_ALARM,
- HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
- HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT),
- NULL
- };
- static const struct hwmon_ops adt7411_hwmon_ops = {
- .is_visible = adt7411_is_visible,
- .read = adt7411_read,
- .write = adt7411_write,
- };
- static const struct hwmon_chip_info adt7411_chip_info = {
- .ops = &adt7411_hwmon_ops,
- .info = adt7411_info,
- };
- static int adt7411_probe(struct i2c_client *client)
- {
- struct device *dev = &client->dev;
- struct adt7411_data *data;
- struct device *hwmon_dev;
- int ret;
- data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
- i2c_set_clientdata(client, data);
- data->client = client;
- mutex_init(&data->device_lock);
- mutex_init(&data->update_lock);
- ret = adt7411_init_device(data);
- if (ret < 0)
- return ret;
- /* force update on first occasion */
- data->next_update = jiffies;
- hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
- data,
- &adt7411_chip_info,
- adt7411_groups);
- return PTR_ERR_OR_ZERO(hwmon_dev);
- }
- static const struct i2c_device_id adt7411_id[] = {
- { "adt7411", 0 },
- { }
- };
- MODULE_DEVICE_TABLE(i2c, adt7411_id);
- static struct i2c_driver adt7411_driver = {
- .driver = {
- .name = "adt7411",
- },
- .probe_new = adt7411_probe,
- .id_table = adt7411_id,
- .detect = adt7411_detect,
- .address_list = normal_i2c,
- .class = I2C_CLASS_HWMON,
- };
- module_i2c_driver(adt7411_driver);
- MODULE_AUTHOR("Sascha Hauer, Wolfram Sang <[email protected]>");
- MODULE_DESCRIPTION("ADT7411 driver");
- MODULE_LICENSE("GPL v2");
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