diff options
Diffstat (limited to 'drivers/staging/iio/adc/adt7410.c')
| -rw-r--r-- | drivers/staging/iio/adc/adt7410.c | 915 |
1 files changed, 915 insertions, 0 deletions
diff --git a/drivers/staging/iio/adc/adt7410.c b/drivers/staging/iio/adc/adt7410.c new file mode 100644 index 000000000000..c345f27ec7fc --- /dev/null +++ b/drivers/staging/iio/adc/adt7410.c @@ -0,0 +1,915 @@ +/* + * ADT7410 digital temperature sensor driver supporting ADT7410 + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/workqueue.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/list.h> +#include <linux/i2c.h> +#include <linux/rtc.h> + +#include "../iio.h" +#include "../sysfs.h" + +/* + * ADT7410 registers definition + */ + +#define ADT7410_TEMPERATURE 0 +#define ADT7410_STATUS 2 +#define ADT7410_CONFIG 3 +#define ADT7410_T_ALARM_HIGH 4 +#define ADT7410_T_ALARM_LOW 6 +#define ADT7410_T_CRIT 8 +#define ADT7410_T_HYST 0xA +#define ADT7410_ID 0xB +#define ADT7410_RESET 0x2F + +/* + * ADT7410 status + */ +#define ADT7410_STAT_T_LOW 0x10 +#define ADT7410_STAT_T_HIGH 0x20 +#define ADT7410_STAT_T_CRIT 0x40 +#define ADT7410_STAT_NOT_RDY 0x80 + +/* + * ADT7410 config + */ +#define ADT7410_FAULT_QUEUE_MASK 0x3 +#define ADT7410_CT_POLARITY 0x4 +#define ADT7410_INT_POLARITY 0x8 +#define ADT7410_EVENT_MODE 0x10 +#define ADT7410_MODE_MASK 0x60 +#define ADT7410_ONESHOT 0x20 +#define ADT7410_SPS 0x40 +#define ADT7410_PD 0x60 +#define ADT7410_RESOLUTION 0x80 + +/* + * ADT7410 masks + */ +#define ADT7410_T16_VALUE_SIGN 0x8000 +#define ADT7410_T16_VALUE_FLOAT_OFFSET 7 +#define ADT7410_T16_VALUE_FLOAT_MASK 0x7F +#define ADT7410_T13_VALUE_SIGN 0x1000 +#define ADT7410_T13_VALUE_OFFSET 3 +#define ADT7410_T13_VALUE_FLOAT_OFFSET 4 +#define ADT7410_T13_VALUE_FLOAT_MASK 0xF +#define ADT7410_T_HYST_MASK 0xF +#define ADT7410_DEVICE_ID_MASK 0xF +#define ADT7410_MANUFACTORY_ID_MASK 0xF0 +#define ADT7410_MANUFACTORY_ID_OFFSET 4 + +#define ADT7410_IRQS 2 + +/* + * struct adt7410_chip_info - chip specifc information + */ + +struct adt7410_chip_info { + const char *name; + struct i2c_client *client; + struct iio_dev *indio_dev; + struct work_struct thresh_work; + s64 last_timestamp; + u8 config; +}; + +/* + * adt7410 register access by I2C + */ + +static int adt7410_i2c_read_word(struct adt7410_chip_info *chip, u8 reg, u16 *data) +{ + struct i2c_client *client = chip->client; + int ret = 0; + + ret = i2c_smbus_read_word_data(client, reg); + if (ret < 0) { + dev_err(&client->dev, "I2C read error\n"); + return ret; + } + + *data = swab16((u16)ret); + + return 0; +} + +static int adt7410_i2c_write_word(struct adt7410_chip_info *chip, u8 reg, u16 data) +{ + struct i2c_client *client = chip->client; + int ret = 0; + + ret = i2c_smbus_write_word_data(client, reg, swab16(data)); + if (ret < 0) + dev_err(&client->dev, "I2C write error\n"); + + return ret; +} + +static int adt7410_i2c_read_byte(struct adt7410_chip_info *chip, u8 reg, u8 *data) +{ + struct i2c_client *client = chip->client; + int ret = 0; + + ret = i2c_smbus_read_byte_data(client, reg); + if (ret < 0) { + dev_err(&client->dev, "I2C read error\n"); + return ret; + } + + *data = (u8)ret; + + return 0; +} + +static int adt7410_i2c_write_byte(struct adt7410_chip_info *chip, u8 reg, u8 data) +{ + struct i2c_client *client = chip->client; + int ret = 0; + + ret = i2c_smbus_write_byte_data(client, reg, data); + if (ret < 0) + dev_err(&client->dev, "I2C write error\n"); + + return ret; +} + +static ssize_t adt7410_show_mode(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + u8 config; + + config = chip->config & ADT7410_MODE_MASK; + + switch (config) { + case ADT7410_PD: + return sprintf(buf, "power-down\n"); + case ADT7410_ONESHOT: + return sprintf(buf, "one-shot\n"); + case ADT7410_SPS: + return sprintf(buf, "sps\n"); + default: + return sprintf(buf, "full\n"); + } +} + +static ssize_t adt7410_store_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + u16 config; + int ret; + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) + return -EIO; + + config = chip->config & (~ADT7410_MODE_MASK); + if (strcmp(buf, "power-down")) + config |= ADT7410_PD; + else if (strcmp(buf, "one-shot")) + config |= ADT7410_ONESHOT; + else if (strcmp(buf, "sps")) + config |= ADT7410_SPS; + + ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config); + if (ret) + return -EIO; + + chip->config = config; + + return ret; +} + +static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, + adt7410_show_mode, + adt7410_store_mode, + 0); + +static ssize_t adt7410_show_available_modes(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "full\none-shot\nsps\npower-down\n"); +} + +static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt7410_show_available_modes, NULL, 0); + +static ssize_t adt7410_show_resolution(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + int ret; + int bits; + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) + return -EIO; + + if (chip->config & ADT7410_RESOLUTION) + bits = 16; + else + bits = 13; + + return sprintf(buf, "%d bits\n", bits); +} + +static ssize_t adt7410_store_resolution(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + unsigned long data; + u16 config; + int ret; + + ret = strict_strtoul(buf, 10, &data); + if (ret) + return -EINVAL; + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) + return -EIO; + + config = chip->config & (~ADT7410_RESOLUTION); + if (data) + config |= ADT7410_RESOLUTION; + + ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config); + if (ret) + return -EIO; + + chip->config = config; + + return ret; +} + +static IIO_DEVICE_ATTR(resolution, S_IRUGO | S_IWUSR, + adt7410_show_resolution, + adt7410_store_resolution, + 0); + +static ssize_t adt7410_show_id(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + u8 id; + int ret; + + ret = adt7410_i2c_read_byte(chip, ADT7410_ID, &id); + if (ret) + return -EIO; + + return sprintf(buf, "device id: 0x%x\nmanufactory id: 0x%x\n", + id & ADT7410_DEVICE_ID_MASK, + (id & ADT7410_MANUFACTORY_ID_MASK) >> ADT7410_MANUFACTORY_ID_OFFSET); +} + +static IIO_DEVICE_ATTR(id, S_IRUGO | S_IWUSR, + adt7410_show_id, + NULL, + 0); + +static ssize_t adt7410_convert_temperature(struct adt7410_chip_info *chip, + u16 data, char *buf) +{ + char sign = ' '; + + if (chip->config & ADT7410_RESOLUTION) { + if (data & ADT7410_T16_VALUE_SIGN) { + /* convert supplement to positive value */ + data = (u16)((ADT7410_T16_VALUE_SIGN << 1) - (u32)data); + sign = '-'; + } + return sprintf(buf, "%c%d.%.7d\n", sign, + (data >> ADT7410_T16_VALUE_FLOAT_OFFSET), + (data & ADT7410_T16_VALUE_FLOAT_MASK) * 78125); + } else { + if (data & ADT7410_T13_VALUE_SIGN) { + /* convert supplement to positive value */ + data >>= ADT7410_T13_VALUE_OFFSET; + data = (ADT7410_T13_VALUE_SIGN << 1) - data; + sign = '-'; + } + return sprintf(buf, "%c%d.%.4d\n", sign, + (data >> ADT7410_T13_VALUE_FLOAT_OFFSET), + (data & ADT7410_T13_VALUE_FLOAT_MASK) * 625); + } +} + +static ssize_t adt7410_show_value(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + u8 status; + u16 data; + int ret, i = 0; + + do { + ret = adt7410_i2c_read_byte(chip, ADT7410_STATUS, &status); + if (ret) + return -EIO; + i++; + if (i == 10000) + return -EIO; + } while (status & ADT7410_STAT_NOT_RDY); + + ret = adt7410_i2c_read_word(chip, ADT7410_TEMPERATURE, &data); + if (ret) + return -EIO; + + return adt7410_convert_temperature(chip, data, buf); +} + +static IIO_DEVICE_ATTR(value, S_IRUGO, adt7410_show_value, NULL, 0); + +static ssize_t adt7410_show_name(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + return sprintf(buf, "%s\n", chip->name); +} + +static IIO_DEVICE_ATTR(name, S_IRUGO, adt7410_show_name, NULL, 0); + +static struct attribute *adt7410_attributes[] = { + &iio_dev_attr_available_modes.dev_attr.attr, + &iio_dev_attr_mode.dev_attr.attr, + &iio_dev_attr_resolution.dev_attr.attr, + &iio_dev_attr_id.dev_attr.attr, + &iio_dev_attr_value.dev_attr.attr, + &iio_dev_attr_name.dev_attr.attr, + NULL, +}; + +static const struct attribute_group adt7410_attribute_group = { + .attrs = adt7410_attributes, +}; + +/* + * temperature bound events + */ + +#define IIO_EVENT_CODE_ADT7410_ABOVE_ALARM IIO_BUFFER_EVENT_CODE(0) +#define IIO_EVENT_CODE_ADT7410_BELLOW_ALARM IIO_BUFFER_EVENT_CODE(1) +#define IIO_EVENT_CODE_ADT7410_ABOVE_CRIT IIO_BUFFER_EVENT_CODE(2) + +static void adt7410_interrupt_bh(struct work_struct *work_s) +{ + struct adt7410_chip_info *chip = + container_of(work_s, struct adt7410_chip_info, thresh_work); + u8 status; + + if (adt7410_i2c_read_byte(chip, ADT7410_STATUS, &status)) + return; + + enable_irq(chip->client->irq); + + if (status & ADT7410_STAT_T_HIGH) + iio_push_event(chip->indio_dev, 0, + IIO_EVENT_CODE_ADT7410_ABOVE_ALARM, + chip->last_timestamp); + if (status & ADT7410_STAT_T_LOW) + iio_push_event(chip->indio_dev, 0, + IIO_EVENT_CODE_ADT7410_BELLOW_ALARM, + chip->last_timestamp); + if (status & ADT7410_STAT_T_CRIT) + iio_push_event(chip->indio_dev, 0, + IIO_EVENT_CODE_ADT7410_ABOVE_CRIT, + chip->last_timestamp); +} + +static int adt7410_interrupt(struct iio_dev *dev_info, + int index, + s64 timestamp, + int no_test) +{ + struct adt7410_chip_info *chip = dev_info->dev_data; + + chip->last_timestamp = timestamp; + schedule_work(&chip->thresh_work); + + return 0; +} + +IIO_EVENT_SH(adt7410, &adt7410_interrupt); +IIO_EVENT_SH(adt7410_ct, &adt7410_interrupt); + +static ssize_t adt7410_show_event_mode(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + int ret; + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) + return -EIO; + + if (chip->config & ADT7410_EVENT_MODE) + return sprintf(buf, "interrupt\n"); + else + return sprintf(buf, "comparator\n"); +} + +static ssize_t adt7410_set_event_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + u16 config; + int ret; + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) + return -EIO; + + config = chip->config &= ~ADT7410_EVENT_MODE; + if (strcmp(buf, "comparator") != 0) + config |= ADT7410_EVENT_MODE; + + ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config); + if (ret) + return -EIO; + + chip->config = config; + + return ret; +} + +static ssize_t adt7410_show_available_event_modes(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "comparator\ninterrupt\n"); +} + +static ssize_t adt7410_show_fault_queue(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + int ret; + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) + return -EIO; + + return sprintf(buf, "%d\n", chip->config & ADT7410_FAULT_QUEUE_MASK); +} + +static ssize_t adt7410_set_fault_queue(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + unsigned long data; + int ret; + u8 config; + + ret = strict_strtoul(buf, 10, &data); + if (ret || data > 3) + return -EINVAL; + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) + return -EIO; + + config = chip->config & ~ADT7410_FAULT_QUEUE_MASK; + config |= data; + ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config); + if (ret) + return -EIO; + + chip->config = config; + + return ret; +} + +static inline ssize_t adt7410_show_t_bound(struct device *dev, + struct device_attribute *attr, + u8 bound_reg, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + u16 data; + int ret; + + ret = adt7410_i2c_read_word(chip, bound_reg, &data); + if (ret) + return -EIO; + + return adt7410_convert_temperature(chip, data, buf); +} + +static inline ssize_t adt7410_set_t_bound(struct device *dev, + struct device_attribute *attr, + u8 bound_reg, + const char *buf, + size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + long tmp1, tmp2; + u16 data; + char *pos; + int ret; + + pos = strchr(buf, '.'); + + ret = strict_strtol(buf, 10, &tmp1); + + if (ret || tmp1 > 127 || tmp1 < -128) + return -EINVAL; + + if (pos) { + len = strlen(pos); + + if (chip->config & ADT7410_RESOLUTION) { + if (len > ADT7410_T16_VALUE_FLOAT_OFFSET) + len = ADT7410_T16_VALUE_FLOAT_OFFSET; + pos[len] = 0; + ret = strict_strtol(pos, 10, &tmp2); + + if (!ret) + tmp2 = (tmp2 / 78125) * 78125; + } else { + if (len > ADT7410_T13_VALUE_FLOAT_OFFSET) + len = ADT7410_T13_VALUE_FLOAT_OFFSET; + pos[len] = 0; + ret = strict_strtol(pos, 10, &tmp2); + + if (!ret) + tmp2 = (tmp2 / 625) * 625; + } + } + + if (tmp1 < 0) + data = (u16)(-tmp1); + else + data = (u16)tmp1; + + if (chip->config & ADT7410_RESOLUTION) { + data = (data << ADT7410_T16_VALUE_FLOAT_OFFSET) | + (tmp2 & ADT7410_T16_VALUE_FLOAT_MASK); + + if (tmp1 < 0) + /* convert positive value to supplyment */ + data = (u16)((ADT7410_T16_VALUE_SIGN << 1) - (u32)data); + } else { + data = (data << ADT7410_T13_VALUE_FLOAT_OFFSET) | + (tmp2 & ADT7410_T13_VALUE_FLOAT_MASK); + + if (tmp1 < 0) + /* convert positive value to supplyment */ + data = (ADT7410_T13_VALUE_SIGN << 1) - data; + data <<= ADT7410_T13_VALUE_OFFSET; + } + + ret = adt7410_i2c_write_word(chip, bound_reg, data); + if (ret) + return -EIO; + + return ret; +} + +static ssize_t adt7410_show_t_alarm_high(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return adt7410_show_t_bound(dev, attr, + ADT7410_T_ALARM_HIGH, buf); +} + +static inline ssize_t adt7410_set_t_alarm_high(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + return adt7410_set_t_bound(dev, attr, + ADT7410_T_ALARM_HIGH, buf, len); +} + +static ssize_t adt7410_show_t_alarm_low(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return adt7410_show_t_bound(dev, attr, + ADT7410_T_ALARM_LOW, buf); +} + +static inline ssize_t adt7410_set_t_alarm_low(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + return adt7410_set_t_bound(dev, attr, + ADT7410_T_ALARM_LOW, buf, len); +} + +static ssize_t adt7410_show_t_crit(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return adt7410_show_t_bound(dev, attr, + ADT7410_T_CRIT, buf); +} + +static inline ssize_t adt7410_set_t_crit(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + return adt7410_set_t_bound(dev, attr, + ADT7410_T_CRIT, buf, len); +} + +static ssize_t adt7410_show_t_hyst(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + int ret; + u8 t_hyst; + + ret = adt7410_i2c_read_byte(chip, ADT7410_T_HYST, &t_hyst); + if (ret) + return -EIO; + + return sprintf(buf, "%d\n", t_hyst & ADT7410_T_HYST_MASK); +} + +static inline ssize_t adt7410_set_t_hyst(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *dev_info = dev_get_drvdata(dev); + struct adt7410_chip_info *chip = dev_info->dev_data; + int ret; + unsigned long data; + u8 t_hyst; + + ret = strict_strtol(buf, 10, &data); + + if (ret || data > ADT7410_T_HYST_MASK) + return -EINVAL; + + t_hyst = (u8)data; + + ret = adt7410_i2c_write_byte(chip, ADT7410_T_HYST, t_hyst); + if (ret) + return -EIO; + + return ret; +} + +IIO_EVENT_ATTR_SH(event_mode, iio_event_adt7410, + adt7410_show_event_mode, adt7410_set_event_mode, 0); +IIO_EVENT_ATTR_SH(available_event_modes, iio_event_adt7410, + adt7410_show_available_event_modes, NULL, 0); +IIO_EVENT_ATTR_SH(fault_queue, iio_event_adt7410, + adt7410_show_fault_queue, adt7410_set_fault_queue, 0); +IIO_EVENT_ATTR_SH(t_alarm_high, iio_event_adt7410, + adt7410_show_t_alarm_high, adt7410_set_t_alarm_high, 0); +IIO_EVENT_ATTR_SH(t_alarm_low, iio_event_adt7410, + adt7410_show_t_alarm_low, adt7410_set_t_alarm_low, 0); +IIO_EVENT_ATTR_SH(t_crit, iio_event_adt7410_ct, + adt7410_show_t_crit, adt7410_set_t_crit, 0); +IIO_EVENT_ATTR_SH(t_hyst, iio_event_adt7410, + adt7410_show_t_hyst, adt7410_set_t_hyst, 0); + +static struct attribute *adt7410_event_int_attributes[] = { + &iio_event_attr_event_mode.dev_attr.attr, + &iio_event_attr_available_event_modes.dev_attr.attr, + &iio_event_attr_fault_queue.dev_attr.attr, + &iio_event_attr_t_alarm_high.dev_attr.attr, + &iio_event_attr_t_alarm_low.dev_attr.attr, + &iio_event_attr_t_hyst.dev_attr.attr, + NULL, +}; + +static struct attribute *adt7410_event_ct_attributes[] = { + &iio_event_attr_event_mode.dev_attr.attr, + &iio_event_attr_available_event_modes.dev_attr.attr, + &iio_event_attr_fault_queue.dev_attr.attr, + &iio_event_attr_t_crit.dev_attr.attr, + &iio_event_attr_t_hyst.dev_attr.attr, + NULL, +}; + +static struct attribute_group adt7410_event_attribute_group[ADT7410_IRQS] = { + { + .attrs = adt7410_event_int_attributes, + }, + { + .attrs = adt7410_event_ct_attributes, + } +}; + +/* + * device probe and remove + */ + +static int __devinit adt7410_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct adt7410_chip_info *chip; + int ret = 0; + unsigned long *adt7410_platform_data = client->dev.platform_data; + + chip = kzalloc(sizeof(struct adt7410_chip_info), GFP_KERNEL); + + if (chip == NULL) + return -ENOMEM; + + /* this is only used for device removal purposes */ + i2c_set_clientdata(client, chip); + + chip->client = client; + chip->name = id->name; + + chip->indio_dev = iio_allocate_device(); + if (chip->indio_dev == NULL) { + ret = -ENOMEM; + goto error_free_chip; + } + + chip->indio_dev->dev.parent = &client->dev; + chip->indio_dev->attrs = &adt7410_attribute_group; + chip->indio_dev->event_attrs = adt7410_event_attribute_group; + chip->indio_dev->dev_data = (void *)chip; + chip->indio_dev->driver_module = THIS_MODULE; + chip->indio_dev->num_interrupt_lines = ADT7410_IRQS; + chip->indio_dev->modes = INDIO_DIRECT_MODE; + + ret = iio_device_register(chip->indio_dev); + if (ret) + goto error_free_dev; + + /* CT critcal temperature event. line 0 */ + if (client->irq) { + ret = iio_register_interrupt_line(client->irq, + chip->indio_dev, + 0, + IRQF_TRIGGER_LOW, + chip->name); + if (ret) + goto error_unreg_dev; + + /* + * The event handler list element refer to iio_event_adt7410. + * All event attributes bind to the same event handler. + * One event handler can only be added to one event list. + */ + iio_add_event_to_list(&iio_event_adt7410, + &chip->indio_dev->interrupts[0]->ev_list); + } + + /* INT bound temperature alarm event. line 1 */ + if (adt7410_platform_data[0]) { + ret = iio_register_interrupt_line(adt7410_platform_data[0], + chip->indio_dev, + 1, + adt7410_platform_data[1], + chip->name); + if (ret) + goto error_unreg_ct_irq; + + /* + * The event handler list element refer to iio_event_adt7410. + * All event attributes bind to the same event handler. + * One event handler can only be added to one event list. + */ + iio_add_event_to_list(&iio_event_adt7410_ct, + &chip->indio_dev->interrupts[1]->ev_list); + } + + if (client->irq && adt7410_platform_data[0]) { + INIT_WORK(&chip->thresh_work, adt7410_interrupt_bh); + + ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config); + if (ret) { + ret = -EIO; + goto error_unreg_int_irq; + } + + /* set irq polarity low level */ + chip->config &= ~ADT7410_CT_POLARITY; + + if (adt7410_platform_data[1] & IRQF_TRIGGER_HIGH) + chip->config |= ADT7410_INT_POLARITY; + else + chip->config &= ~ADT7410_INT_POLARITY; + + ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, chip->config); + if (ret) { + ret = -EIO; + goto error_unreg_int_irq; + } + } + + dev_info(&client->dev, "%s temperature sensor registered.\n", + id->name); + + return 0; + +error_unreg_int_irq: + iio_unregister_interrupt_line(chip->indio_dev, 1); +error_unreg_ct_irq: + iio_unregister_interrupt_line(chip->indio_dev, 0); +error_unreg_dev: + iio_device_unregister(chip->indio_dev); +error_free_dev: + iio_free_device(chip->indio_dev); +error_free_chip: + kfree(chip); + + return ret; +} + +static int __devexit adt7410_remove(struct i2c_client *client) +{ + struct adt7410_chip_info *chip = i2c_get_clientdata(client); + struct iio_dev *indio_dev = chip->indio_dev; + unsigned long *adt7410_platform_data = client->dev.platform_data; + + if (adt7410_platform_data[0]) + iio_unregister_interrupt_line(indio_dev, 1); + if (client->irq) + iio_unregister_interrupt_line(indio_dev, 0); + iio_device_unregister(indio_dev); + iio_free_device(chip->indio_dev); + kfree(chip); + + return 0; +} + +static const struct i2c_device_id adt7410_id[] = { + { "adt7410", 0 }, + {} +}; + +MODULE_DEVICE_TABLE(i2c, adt7410_id); + +static struct i2c_driver adt7410_driver = { + .driver = { + .name = "adt7410", + }, + .probe = adt7410_probe, + .remove = __devexit_p(adt7410_remove), + .id_table = adt7410_id, +}; + +static __init int adt7410_init(void) +{ + return i2c_add_driver(&adt7410_driver); +} + +static __exit void adt7410_exit(void) +{ + i2c_del_driver(&adt7410_driver); +} + +MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>"); +MODULE_DESCRIPTION("Analog Devices ADT7410 digital" + " temperature sensor driver"); +MODULE_LICENSE("GPL v2"); + +module_init(adt7410_init); +module_exit(adt7410_exit); |