+++ /dev/null
-/*
- * ADT7410 digital temperature sensor driver supporting ADT7310/ADT7410
- *
- * Copyright 2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/interrupt.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/spi/spi.h>
-#include <linux/module.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/events.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
-
-/*
- * ADT7310 registers definition
- */
-
-#define ADT7310_STATUS 0
-#define ADT7310_CONFIG 1
-#define ADT7310_TEMPERATURE 2
-#define ADT7310_ID 3
-#define ADT7310_T_CRIT 4
-#define ADT7310_T_HYST 5
-#define ADT7310_T_ALARM_HIGH 6
-#define ADT7310_T_ALARM_LOW 7
-
-/*
- * 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 ADT7310_CMD_REG_MASK 0x28
-#define ADT7310_CMD_REG_OFFSET 3
-#define ADT7310_CMD_READ 0x40
-#define ADT7310_CMD_CON_READ 0x4
-
-#define ADT7410_IRQS 2
-
-/*
- * struct adt7410_chip_info - chip specifc information
- */
-
-struct adt7410_chip_info;
-
-struct adt7410_ops {
- int (*read_word)(struct adt7410_chip_info *, u8 reg, u16 *data);
- int (*write_word)(struct adt7410_chip_info *, u8 reg, u16 data);
- int (*read_byte)(struct adt7410_chip_info *, u8 reg, u8 *data);
- int (*write_byte)(struct adt7410_chip_info *, u8 reg, u8 data);
-};
-
-struct adt7410_chip_info {
- struct device *dev;
- u8 config;
-
- const struct adt7410_ops *ops;
-};
-
-static int adt7410_read_word(struct adt7410_chip_info *chip, u8 reg, u16 *data)
-{
- return chip->ops->read_word(chip, reg, data);
-}
-
-static int adt7410_write_word(struct adt7410_chip_info *chip, u8 reg, u16 data)
-{
- return chip->ops->write_word(chip, reg, data);
-}
-
-static int adt7410_read_byte(struct adt7410_chip_info *chip, u8 reg, u8 *data)
-{
- return chip->ops->read_byte(chip, reg, data);
-}
-
-static int adt7410_write_byte(struct adt7410_chip_info *chip, u8 reg, u8 data)
-{
- return chip->ops->write_byte(chip, reg, data);
-}
-
-static ssize_t adt7410_show_mode(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *dev_info = dev_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- 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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- u16 config;
- int ret;
-
- ret = adt7410_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_write_byte(chip, ADT7410_CONFIG, config);
- if (ret)
- return -EIO;
-
- chip->config = config;
-
- return len;
-}
-
-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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- int ret;
- int bits;
-
- ret = adt7410_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- unsigned long data;
- u16 config;
- int ret;
-
- ret = strict_strtoul(buf, 10, &data);
- if (ret)
- return -EINVAL;
-
- ret = adt7410_read_byte(chip, ADT7410_CONFIG, &chip->config);
- if (ret)
- return -EIO;
-
- config = chip->config & (~ADT7410_RESOLUTION);
- if (data)
- config |= ADT7410_RESOLUTION;
-
- ret = adt7410_write_byte(chip, ADT7410_CONFIG, config);
- if (ret)
- return -EIO;
-
- chip->config = config;
-
- return len;
-}
-
-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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- u8 id;
- int ret;
-
- ret = adt7410_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))
- data &= ~0x7;
-
- 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);
-}
-
-static ssize_t adt7410_show_value(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *dev_info = dev_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- u8 status;
- u16 data;
- int ret, i = 0;
-
- do {
- ret = adt7410_read_byte(chip, ADT7410_STATUS, &status);
- if (ret)
- return -EIO;
- i++;
- if (i == 10000)
- return -EIO;
- } while (status & ADT7410_STAT_NOT_RDY);
-
- ret = adt7410_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 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,
- NULL,
-};
-
-static const struct attribute_group adt7410_attribute_group = {
- .attrs = adt7410_attributes,
-};
-
-static irqreturn_t adt7410_event_handler(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- struct adt7410_chip_info *chip = iio_priv(indio_dev);
- s64 timestamp = iio_get_time_ns();
- u8 status;
-
- if (adt7410_read_byte(chip, ADT7410_STATUS, &status))
- return IRQ_HANDLED;
-
- if (status & ADT7410_STAT_T_HIGH)
- iio_push_event(indio_dev,
- IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_RISING),
- timestamp);
- if (status & ADT7410_STAT_T_LOW)
- iio_push_event(indio_dev,
- IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_FALLING),
- timestamp);
- if (status & ADT7410_STAT_T_CRIT)
- iio_push_event(indio_dev,
- IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_RISING),
- timestamp);
-
- return IRQ_HANDLED;
-}
-
-static ssize_t adt7410_show_event_mode(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *dev_info = dev_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- int ret;
-
- ret = adt7410_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- u16 config;
- int ret;
-
- ret = adt7410_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_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- int ret;
-
- ret = adt7410_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- unsigned long data;
- int ret;
- u8 config;
-
- ret = strict_strtoul(buf, 10, &data);
- if (ret || data > 3)
- return -EINVAL;
-
- ret = adt7410_read_byte(chip, ADT7410_CONFIG, &chip->config);
- if (ret)
- return -EIO;
-
- config = chip->config & ~ADT7410_FAULT_QUEUE_MASK;
- config |= data;
- ret = adt7410_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- u16 data;
- int ret;
-
- ret = adt7410_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- 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_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- int ret;
- u8 t_hyst;
-
- ret = adt7410_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_to_iio_dev(dev);
- struct adt7410_chip_info *chip = iio_priv(dev_info);
- 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_write_byte(chip, ADT7410_T_HYST, t_hyst);
- if (ret)
- return -EIO;
-
- return ret;
-}
-
-static IIO_DEVICE_ATTR(event_mode,
- S_IRUGO | S_IWUSR,
- adt7410_show_event_mode, adt7410_set_event_mode, 0);
-static IIO_DEVICE_ATTR(available_event_modes,
- S_IRUGO,
- adt7410_show_available_event_modes, NULL, 0);
-static IIO_DEVICE_ATTR(fault_queue,
- S_IRUGO | S_IWUSR,
- adt7410_show_fault_queue, adt7410_set_fault_queue, 0);
-static IIO_DEVICE_ATTR(t_alarm_high,
- S_IRUGO | S_IWUSR,
- adt7410_show_t_alarm_high, adt7410_set_t_alarm_high, 0);
-static IIO_DEVICE_ATTR(t_alarm_low,
- S_IRUGO | S_IWUSR,
- adt7410_show_t_alarm_low, adt7410_set_t_alarm_low, 0);
-static IIO_DEVICE_ATTR(t_crit,
- S_IRUGO | S_IWUSR,
- adt7410_show_t_crit, adt7410_set_t_crit, 0);
-static IIO_DEVICE_ATTR(t_hyst,
- S_IRUGO | S_IWUSR,
- adt7410_show_t_hyst, adt7410_set_t_hyst, 0);
-
-static struct attribute *adt7410_event_int_attributes[] = {
- &iio_dev_attr_event_mode.dev_attr.attr,
- &iio_dev_attr_available_event_modes.dev_attr.attr,
- &iio_dev_attr_fault_queue.dev_attr.attr,
- &iio_dev_attr_t_alarm_high.dev_attr.attr,
- &iio_dev_attr_t_alarm_low.dev_attr.attr,
- &iio_dev_attr_t_crit.dev_attr.attr,
- &iio_dev_attr_t_hyst.dev_attr.attr,
- NULL,
-};
-
-static struct attribute_group adt7410_event_attribute_group = {
- .attrs = adt7410_event_int_attributes,
- .name = "events",
-};
-
-static const struct iio_info adt7410_info = {
- .attrs = &adt7410_attribute_group,
- .event_attrs = &adt7410_event_attribute_group,
- .driver_module = THIS_MODULE,
-};
-
-/*
- * device probe and remove
- */
-
-static int adt7410_probe(struct device *dev, int irq,
- const char *name, const struct adt7410_ops *ops)
-{
- unsigned long *adt7410_platform_data = dev->platform_data;
- unsigned long local_pdata[] = {0, 0};
- struct adt7410_chip_info *chip;
- struct iio_dev *indio_dev;
- int ret = 0;
-
- indio_dev = iio_device_alloc(sizeof(*chip));
- if (indio_dev == NULL) {
- ret = -ENOMEM;
- goto error_ret;
- }
- chip = iio_priv(indio_dev);
- /* this is only used for device removal purposes */
- dev_set_drvdata(dev, indio_dev);
-
- chip->dev = dev;
- chip->ops = ops;
-
- indio_dev->name = name;
- indio_dev->dev.parent = dev;
- indio_dev->info = &adt7410_info;
- indio_dev->modes = INDIO_DIRECT_MODE;
-
- if (!adt7410_platform_data)
- adt7410_platform_data = local_pdata;
-
- /* CT critcal temperature event. line 0 */
- if (irq) {
- ret = request_threaded_irq(irq,
- NULL,
- &adt7410_event_handler,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
- name,
- indio_dev);
- if (ret)
- goto error_free_dev;
- }
-
- /* INT bound temperature alarm event. line 1 */
- if (adt7410_platform_data[0]) {
- ret = request_threaded_irq(adt7410_platform_data[0],
- NULL,
- &adt7410_event_handler,
- adt7410_platform_data[1] |
- IRQF_ONESHOT,
- name,
- indio_dev);
- if (ret)
- goto error_unreg_ct_irq;
- }
-
- ret = adt7410_read_byte(chip, ADT7410_CONFIG, &chip->config);
- if (ret) {
- ret = -EIO;
- goto error_unreg_int_irq;
- }
-
- chip->config |= ADT7410_RESOLUTION;
-
- if (irq && adt7410_platform_data[0]) {
-
- /* 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_write_byte(chip, ADT7410_CONFIG, chip->config);
- if (ret) {
- ret = -EIO;
- goto error_unreg_int_irq;
- }
- ret = iio_device_register(indio_dev);
- if (ret)
- goto error_unreg_int_irq;
-
- dev_info(dev, "%s temperature sensor registered.\n",
- name);
-
- return 0;
-
-error_unreg_int_irq:
- free_irq(adt7410_platform_data[0], indio_dev);
-error_unreg_ct_irq:
- free_irq(irq, indio_dev);
-error_free_dev:
- iio_device_free(indio_dev);
-error_ret:
- return ret;
-}
-
-static int adt7410_remove(struct device *dev, int irq)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- unsigned long *adt7410_platform_data = dev->platform_data;
-
- iio_device_unregister(indio_dev);
- if (adt7410_platform_data[0])
- free_irq(adt7410_platform_data[0], indio_dev);
- if (irq)
- free_irq(irq, indio_dev);
- iio_device_free(indio_dev);
-
- return 0;
-}
-
-#if IS_ENABLED(CONFIG_I2C)
-
-static int adt7410_i2c_read_word(struct adt7410_chip_info *chip, u8 reg,
- u16 *data)
-{
- struct i2c_client *client = to_i2c_client(chip->dev);
- 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 = to_i2c_client(chip->dev);
- 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 = to_i2c_client(chip->dev);
- 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 = to_i2c_client(chip->dev);
- 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 const struct adt7410_ops adt7410_i2c_ops = {
- .read_word = adt7410_i2c_read_word,
- .write_word = adt7410_i2c_write_word,
- .read_byte = adt7410_i2c_read_byte,
- .write_byte = adt7410_i2c_write_byte,
-};
-
-static int adt7410_i2c_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- return adt7410_probe(&client->dev, client->irq, id->name,
- &adt7410_i2c_ops);
-}
-
-static int adt7410_i2c_remove(struct i2c_client *client)
-{
- return adt7410_remove(&client->dev, client->irq);
-}
-
-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_i2c_probe,
- .remove = adt7410_i2c_remove,
- .id_table = adt7410_id,
-};
-
-static int __init adt7410_i2c_init(void)
-{
- return i2c_add_driver(&adt7410_driver);
-}
-
-static void __exit adt7410_i2c_exit(void)
-{
- i2c_del_driver(&adt7410_driver);
-}
-
-#else
-
-static int __init adt7410_i2c_init(void) { return 0; };
-static void __exit adt7410_i2c_exit(void) {};
-
-#endif
-
-#if IS_ENABLED(CONFIG_SPI_MASTER)
-
-static const u8 adt7371_reg_table[] = {
- [ADT7410_TEMPERATURE] = ADT7310_TEMPERATURE,
- [ADT7410_STATUS] = ADT7310_STATUS,
- [ADT7410_CONFIG] = ADT7310_CONFIG,
- [ADT7410_T_ALARM_HIGH] = ADT7310_T_ALARM_HIGH,
- [ADT7410_T_ALARM_LOW] = ADT7310_T_ALARM_LOW,
- [ADT7410_T_CRIT] = ADT7310_T_CRIT,
- [ADT7410_T_HYST] = ADT7310_T_HYST,
- [ADT7410_ID] = ADT7310_ID,
-};
-
-#define AD7310_COMMAND(reg) (adt7371_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET)
-
-static int adt7310_spi_read_word(struct adt7410_chip_info *chip,
- u8 reg, u16 *data)
-{
- struct spi_device *spi = to_spi_device(chip->dev);
- u8 command = AD7310_COMMAND(reg);
- int ret = 0;
-
- command |= ADT7310_CMD_READ;
- ret = spi_write(spi, &command, sizeof(command));
- if (ret < 0) {
- dev_err(&spi->dev, "SPI write command error\n");
- return ret;
- }
-
- ret = spi_read(spi, (u8 *)data, sizeof(*data));
- if (ret < 0) {
- dev_err(&spi->dev, "SPI read word error\n");
- return ret;
- }
-
- *data = be16_to_cpu(*data);
-
- return 0;
-}
-
-static int adt7310_spi_write_word(struct adt7410_chip_info *chip, u8 reg,
- u16 data)
-{
- struct spi_device *spi = to_spi_device(chip->dev);
- u8 buf[3];
- int ret = 0;
-
- buf[0] = AD7310_COMMAND(reg);
- buf[1] = (u8)(data >> 8);
- buf[2] = (u8)(data & 0xFF);
-
- ret = spi_write(spi, buf, 3);
- if (ret < 0) {
- dev_err(&spi->dev, "SPI write word error\n");
- return ret;
- }
-
- return ret;
-}
-
-static int adt7310_spi_read_byte(struct adt7410_chip_info *chip, u8 reg,
- u8 *data)
-{
- struct spi_device *spi = to_spi_device(chip->dev);
- u8 command = AD7310_COMMAND(reg);
- int ret = 0;
-
- command |= ADT7310_CMD_READ;
- ret = spi_write(spi, &command, sizeof(command));
- if (ret < 0) {
- dev_err(&spi->dev, "SPI write command error\n");
- return ret;
- }
-
- ret = spi_read(spi, data, sizeof(*data));
- if (ret < 0) {
- dev_err(&spi->dev, "SPI read byte error\n");
- return ret;
- }
-
- return 0;
-}
-
-static int adt7310_spi_write_byte(struct adt7410_chip_info *chip, u8 reg,
- u8 data)
-{
- struct spi_device *spi = to_spi_device(chip->dev);
- u8 buf[2];
- int ret = 0;
-
- buf[0] = AD7310_COMMAND(reg);
- buf[1] = data;
-
- ret = spi_write(spi, buf, 2);
- if (ret < 0) {
- dev_err(&spi->dev, "SPI write byte error\n");
- return ret;
- }
-
- return ret;
-}
-
-static const struct adt7410_ops adt7310_spi_ops = {
- .read_word = adt7310_spi_read_word,
- .write_word = adt7310_spi_write_word,
- .read_byte = adt7310_spi_read_byte,
- .write_byte = adt7310_spi_write_byte,
-};
-
-static int adt7310_spi_probe(struct spi_device *spi)
-{
- return adt7410_probe(&spi->dev, spi->irq,
- spi_get_device_id(spi)->name, &adt7310_spi_ops);
-}
-
-static int adt7310_spi_remove(struct spi_device *spi)
-{
- return adt7410_remove(&spi->dev, spi->irq);
-}
-
-static const struct spi_device_id adt7310_id[] = {
- { "adt7310", 0 },
- {}
-};
-MODULE_DEVICE_TABLE(spi, adt7310_id);
-
-static struct spi_driver adt7310_driver = {
- .driver = {
- .name = "adt7310",
- .owner = THIS_MODULE,
- },
- .probe = adt7310_spi_probe,
- .remove = adt7310_spi_remove,
- .id_table = adt7310_id,
-};
-
-static int __init adt7310_spi_init(void)
-{
- return spi_register_driver(&adt7310_driver);
-}
-
-static void adt7310_spi_exit(void)
-{
- spi_unregister_driver(&adt7310_driver);
-}
-
-#else
-
-static int __init adt7310_spi_init(void) { return 0; };
-static void adt7310_spi_exit(void) {};
-
-#endif
-
-static int __init adt7410_init(void)
-{
- int ret;
-
- ret = adt7310_spi_init();
- if (ret)
- return ret;
-
- ret = adt7410_i2c_init();
- if (ret)
- adt7310_spi_exit();
-
- return ret;
-}
-module_init(adt7410_init);
-
-static void __exit adt7410_exit(void)
-{
- adt7410_i2c_exit();
- adt7310_spi_exit();
-}
-module_exit(adt7410_exit);
-
-MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
-MODULE_DESCRIPTION("Analog Devices ADT7310/ADT7410 digital temperature sensor driver");
-MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-3.10.git / commitdiff