| /* |
| * ADT7310 digital temperature sensor driver supporting ADT7310 |
| * |
| * 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/spi/spi.h> |
| #include <linux/module.h> |
| |
| #include "../iio.h" |
| #include "../sysfs.h" |
| |
| /* |
| * 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 |
| |
| /* |
| * ADT7310 status |
| */ |
| #define ADT7310_STAT_T_LOW 0x10 |
| #define ADT7310_STAT_T_HIGH 0x20 |
| #define ADT7310_STAT_T_CRIT 0x40 |
| #define ADT7310_STAT_NOT_RDY 0x80 |
| |
| /* |
| * ADT7310 config |
| */ |
| #define ADT7310_FAULT_QUEUE_MASK 0x3 |
| #define ADT7310_CT_POLARITY 0x4 |
| #define ADT7310_INT_POLARITY 0x8 |
| #define ADT7310_EVENT_MODE 0x10 |
| #define ADT7310_MODE_MASK 0x60 |
| #define ADT7310_ONESHOT 0x20 |
| #define ADT7310_SPS 0x40 |
| #define ADT7310_PD 0x60 |
| #define ADT7310_RESOLUTION 0x80 |
| |
| /* |
| * ADT7310 masks |
| */ |
| #define ADT7310_T16_VALUE_SIGN 0x8000 |
| #define ADT7310_T16_VALUE_FLOAT_OFFSET 7 |
| #define ADT7310_T16_VALUE_FLOAT_MASK 0x7F |
| #define ADT7310_T13_VALUE_SIGN 0x1000 |
| #define ADT7310_T13_VALUE_OFFSET 3 |
| #define ADT7310_T13_VALUE_FLOAT_OFFSET 4 |
| #define ADT7310_T13_VALUE_FLOAT_MASK 0xF |
| #define ADT7310_T_HYST_MASK 0xF |
| #define ADT7310_DEVICE_ID_MASK 0x7 |
| #define ADT7310_MANUFACTORY_ID_MASK 0xF8 |
| #define ADT7310_MANUFACTORY_ID_OFFSET 3 |
| |
| |
| #define ADT7310_CMD_REG_MASK 0x28 |
| #define ADT7310_CMD_REG_OFFSET 3 |
| #define ADT7310_CMD_READ 0x40 |
| #define ADT7310_CMD_CON_READ 0x4 |
| |
| #define ADT7310_IRQS 2 |
| |
| /* |
| * struct adt7310_chip_info - chip specifc information |
| */ |
| |
| struct adt7310_chip_info { |
| struct spi_device *spi_dev; |
| u8 config; |
| }; |
| |
| /* |
| * adt7310 register access by SPI |
| */ |
| |
| static int adt7310_spi_read_word(struct adt7310_chip_info *chip, u8 reg, u16 *data) |
| { |
| struct spi_device *spi_dev = chip->spi_dev; |
| u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| int ret = 0; |
| |
| command |= ADT7310_CMD_READ; |
| ret = spi_write(spi_dev, &command, sizeof(command)); |
| if (ret < 0) { |
| dev_err(&spi_dev->dev, "SPI write command error\n"); |
| return ret; |
| } |
| |
| ret = spi_read(spi_dev, (u8 *)data, sizeof(*data)); |
| if (ret < 0) { |
| dev_err(&spi_dev->dev, "SPI read word error\n"); |
| return ret; |
| } |
| |
| *data = be16_to_cpu(*data); |
| |
| return 0; |
| } |
| |
| static int adt7310_spi_write_word(struct adt7310_chip_info *chip, u8 reg, u16 data) |
| { |
| struct spi_device *spi_dev = chip->spi_dev; |
| u8 buf[3]; |
| int ret = 0; |
| |
| buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| buf[1] = (u8)(data >> 8); |
| buf[2] = (u8)(data & 0xFF); |
| |
| ret = spi_write(spi_dev, buf, 3); |
| if (ret < 0) { |
| dev_err(&spi_dev->dev, "SPI write word error\n"); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| static int adt7310_spi_read_byte(struct adt7310_chip_info *chip, u8 reg, u8 *data) |
| { |
| struct spi_device *spi_dev = chip->spi_dev; |
| u8 command = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| int ret = 0; |
| |
| command |= ADT7310_CMD_READ; |
| ret = spi_write(spi_dev, &command, sizeof(command)); |
| if (ret < 0) { |
| dev_err(&spi_dev->dev, "SPI write command error\n"); |
| return ret; |
| } |
| |
| ret = spi_read(spi_dev, data, sizeof(*data)); |
| if (ret < 0) { |
| dev_err(&spi_dev->dev, "SPI read byte error\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int adt7310_spi_write_byte(struct adt7310_chip_info *chip, u8 reg, u8 data) |
| { |
| struct spi_device *spi_dev = chip->spi_dev; |
| u8 buf[2]; |
| int ret = 0; |
| |
| buf[0] = (reg << ADT7310_CMD_REG_OFFSET) & ADT7310_CMD_REG_MASK; |
| buf[1] = data; |
| |
| ret = spi_write(spi_dev, buf, 2); |
| if (ret < 0) { |
| dev_err(&spi_dev->dev, "SPI write byte error\n"); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| static ssize_t adt7310_show_mode(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev *dev_info = dev_get_drvdata(dev); |
| struct adt7310_chip_info *chip = iio_priv(dev_info); |
| u8 config; |
| |
| config = chip->config & ADT7310_MODE_MASK; |
| |
| switch (config) { |
| case ADT7310_PD: |
| return sprintf(buf, "power-down\n"); |
| case ADT7310_ONESHOT: |
| return sprintf(buf, "one-shot\n"); |
| case ADT7310_SPS: |
| return sprintf(buf, "sps\n"); |
| default: |
| return sprintf(buf, "full\n"); |
| } |
| } |
| |
| static ssize_t adt7310_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 adt7310_chip_info *chip = iio_priv(dev_info); |
| u16 config; |
| int ret; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) |
| return -EIO; |
| |
| config = chip->config & (~ADT7310_MODE_MASK); |
| if (strcmp(buf, "power-down")) |
| config |= ADT7310_PD; |
| else if (strcmp(buf, "one-shot")) |
| config |= ADT7310_ONESHOT; |
| else if (strcmp(buf, "sps")) |
| config |= ADT7310_SPS; |
| |
| ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| if (ret) |
| return -EIO; |
| |
| chip->config = config; |
| |
| return len; |
| } |
| |
| static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, |
| adt7310_show_mode, |
| adt7310_store_mode, |
| 0); |
| |
| static ssize_t adt7310_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, adt7310_show_available_modes, NULL, 0); |
| |
| static ssize_t adt7310_show_resolution(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev *dev_info = dev_get_drvdata(dev); |
| struct adt7310_chip_info *chip = iio_priv(dev_info); |
| int ret; |
| int bits; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) |
| return -EIO; |
| |
| if (chip->config & ADT7310_RESOLUTION) |
| bits = 16; |
| else |
| bits = 13; |
| |
| return sprintf(buf, "%d bits\n", bits); |
| } |
| |
| static ssize_t adt7310_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 adt7310_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 = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) |
| return -EIO; |
| |
| config = chip->config & (~ADT7310_RESOLUTION); |
| if (data) |
| config |= ADT7310_RESOLUTION; |
| |
| ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| if (ret) |
| return -EIO; |
| |
| chip->config = config; |
| |
| return len; |
| } |
| |
| static IIO_DEVICE_ATTR(resolution, S_IRUGO | S_IWUSR, |
| adt7310_show_resolution, |
| adt7310_store_resolution, |
| 0); |
| |
| static ssize_t adt7310_show_id(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev *dev_info = dev_get_drvdata(dev); |
| struct adt7310_chip_info *chip = iio_priv(dev_info); |
| u8 id; |
| int ret; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_ID, &id); |
| if (ret) |
| return -EIO; |
| |
| return sprintf(buf, "device id: 0x%x\nmanufactory id: 0x%x\n", |
| id & ADT7310_DEVICE_ID_MASK, |
| (id & ADT7310_MANUFACTORY_ID_MASK) >> ADT7310_MANUFACTORY_ID_OFFSET); |
| } |
| |
| static IIO_DEVICE_ATTR(id, S_IRUGO | S_IWUSR, |
| adt7310_show_id, |
| NULL, |
| 0); |
| |
| static ssize_t adt7310_convert_temperature(struct adt7310_chip_info *chip, |
| u16 data, char *buf) |
| { |
| char sign = ' '; |
| |
| if (chip->config & ADT7310_RESOLUTION) { |
| if (data & ADT7310_T16_VALUE_SIGN) { |
| /* convert supplement to positive value */ |
| data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data); |
| sign = '-'; |
| } |
| return sprintf(buf, "%c%d.%.7d\n", sign, |
| (data >> ADT7310_T16_VALUE_FLOAT_OFFSET), |
| (data & ADT7310_T16_VALUE_FLOAT_MASK) * 78125); |
| } else { |
| if (data & ADT7310_T13_VALUE_SIGN) { |
| /* convert supplement to positive value */ |
| data >>= ADT7310_T13_VALUE_OFFSET; |
| data = (ADT7310_T13_VALUE_SIGN << 1) - data; |
| sign = '-'; |
| } |
| return sprintf(buf, "%c%d.%.4d\n", sign, |
| (data >> ADT7310_T13_VALUE_FLOAT_OFFSET), |
| (data & ADT7310_T13_VALUE_FLOAT_MASK) * 625); |
| } |
| } |
| |
| static ssize_t adt7310_show_value(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev *dev_info = dev_get_drvdata(dev); |
| struct adt7310_chip_info *chip = iio_priv(dev_info); |
| u8 status; |
| u16 data; |
| int ret, i = 0; |
| |
| do { |
| ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status); |
| if (ret) |
| return -EIO; |
| i++; |
| if (i == 10000) |
| return -EIO; |
| } while (status & ADT7310_STAT_NOT_RDY); |
| |
| ret = adt7310_spi_read_word(chip, ADT7310_TEMPERATURE, &data); |
| if (ret) |
| return -EIO; |
| |
| return adt7310_convert_temperature(chip, data, buf); |
| } |
| |
| static IIO_DEVICE_ATTR(value, S_IRUGO, adt7310_show_value, NULL, 0); |
| |
| static struct attribute *adt7310_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 adt7310_attribute_group = { |
| .attrs = adt7310_attributes, |
| }; |
| |
| static irqreturn_t adt7310_event_handler(int irq, void *private) |
| { |
| struct iio_dev *indio_dev = private; |
| struct adt7310_chip_info *chip = iio_priv(indio_dev); |
| s64 timestamp = iio_get_time_ns(); |
| u8 status; |
| int ret; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_STATUS, &status); |
| if (ret) |
| return ret; |
| |
| if (status & ADT7310_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 & ADT7310_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 & ADT7310_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 adt7310_show_event_mode(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev *dev_info = dev_get_drvdata(dev); |
| struct adt7310_chip_info *chip = iio_priv(dev_info); |
| int ret; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) |
| return -EIO; |
| |
| if (chip->config & ADT7310_EVENT_MODE) |
| return sprintf(buf, "interrupt\n"); |
| else |
| return sprintf(buf, "comparator\n"); |
| } |
| |
| static ssize_t adt7310_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 adt7310_chip_info *chip = iio_priv(dev_info); |
| u16 config; |
| int ret; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) |
| return -EIO; |
| |
| config = chip->config &= ~ADT7310_EVENT_MODE; |
| if (strcmp(buf, "comparator") != 0) |
| config |= ADT7310_EVENT_MODE; |
| |
| ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| if (ret) |
| return -EIO; |
| |
| chip->config = config; |
| |
| return len; |
| } |
| |
| static ssize_t adt7310_show_available_event_modes(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "comparator\ninterrupt\n"); |
| } |
| |
| static ssize_t adt7310_show_fault_queue(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev *dev_info = dev_get_drvdata(dev); |
| struct adt7310_chip_info *chip = iio_priv(dev_info); |
| int ret; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) |
| return -EIO; |
| |
| return sprintf(buf, "%d\n", chip->config & ADT7310_FAULT_QUEUE_MASK); |
| } |
| |
| static ssize_t adt7310_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 adt7310_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 = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) |
| return -EIO; |
| |
| config = chip->config & ~ADT7310_FAULT_QUEUE_MASK; |
| config |= data; |
| ret = adt7310_spi_write_byte(chip, ADT7310_CONFIG, config); |
| if (ret) |
| return -EIO; |
| |
| chip->config = config; |
| |
| return len; |
| } |
| |
| static inline ssize_t adt7310_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 adt7310_chip_info *chip = iio_priv(dev_info); |
| u16 data; |
| int ret; |
| |
| ret = adt7310_spi_read_word(chip, bound_reg, &data); |
| if (ret) |
| return -EIO; |
| |
| return adt7310_convert_temperature(chip, data, buf); |
| } |
| |
| static inline ssize_t adt7310_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 adt7310_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 & ADT7310_RESOLUTION) { |
| if (len > ADT7310_T16_VALUE_FLOAT_OFFSET) |
| len = ADT7310_T16_VALUE_FLOAT_OFFSET; |
| pos[len] = 0; |
| ret = strict_strtol(pos, 10, &tmp2); |
| |
| if (!ret) |
| tmp2 = (tmp2 / 78125) * 78125; |
| } else { |
| if (len > ADT7310_T13_VALUE_FLOAT_OFFSET) |
| len = ADT7310_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 & ADT7310_RESOLUTION) { |
| data = (data << ADT7310_T16_VALUE_FLOAT_OFFSET) | |
| (tmp2 & ADT7310_T16_VALUE_FLOAT_MASK); |
| |
| if (tmp1 < 0) |
| /* convert positive value to supplyment */ |
| data = (u16)((ADT7310_T16_VALUE_SIGN << 1) - (u32)data); |
| } else { |
| data = (data << ADT7310_T13_VALUE_FLOAT_OFFSET) | |
| (tmp2 & ADT7310_T13_VALUE_FLOAT_MASK); |
| |
| if (tmp1 < 0) |
| /* convert positive value to supplyment */ |
| data = (ADT7310_T13_VALUE_SIGN << 1) - data; |
| data <<= ADT7310_T13_VALUE_OFFSET; |
| } |
| |
| ret = adt7310_spi_write_word(chip, bound_reg, data); |
| if (ret) |
| return -EIO; |
| |
| return len; |
| } |
| |
| static ssize_t adt7310_show_t_alarm_high(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return adt7310_show_t_bound(dev, attr, |
| ADT7310_T_ALARM_HIGH, buf); |
| } |
| |
| static inline ssize_t adt7310_set_t_alarm_high(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, |
| size_t len) |
| { |
| return adt7310_set_t_bound(dev, attr, |
| ADT7310_T_ALARM_HIGH, buf, len); |
| } |
| |
| static ssize_t adt7310_show_t_alarm_low(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return adt7310_show_t_bound(dev, attr, |
| ADT7310_T_ALARM_LOW, buf); |
| } |
| |
| static inline ssize_t adt7310_set_t_alarm_low(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, |
| size_t len) |
| { |
| return adt7310_set_t_bound(dev, attr, |
| ADT7310_T_ALARM_LOW, buf, len); |
| } |
| |
| static ssize_t adt7310_show_t_crit(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return adt7310_show_t_bound(dev, attr, |
| ADT7310_T_CRIT, buf); |
| } |
| |
| static inline ssize_t adt7310_set_t_crit(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, |
| size_t len) |
| { |
| return adt7310_set_t_bound(dev, attr, |
| ADT7310_T_CRIT, buf, len); |
| } |
| |
| static ssize_t adt7310_show_t_hyst(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct iio_dev *dev_info = dev_get_drvdata(dev); |
| struct adt7310_chip_info *chip = iio_priv(dev_info); |
| int ret; |
| u8 t_hyst; |
| |
| ret = adt7310_spi_read_byte(chip, ADT7310_T_HYST, &t_hyst); |
| if (ret) |
| return -EIO; |
| |
| return sprintf(buf, "%d\n", t_hyst & ADT7310_T_HYST_MASK); |
| } |
| |
| static inline ssize_t adt7310_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 adt7310_chip_info *chip = iio_priv(dev_info); |
| int ret; |
| unsigned long data; |
| u8 t_hyst; |
| |
| ret = strict_strtol(buf, 10, &data); |
| |
| if (ret || data > ADT7310_T_HYST_MASK) |
| return -EINVAL; |
| |
| t_hyst = (u8)data; |
| |
| ret = adt7310_spi_write_byte(chip, ADT7310_T_HYST, t_hyst); |
| if (ret) |
| return -EIO; |
| |
| return len; |
| } |
| |
| static IIO_DEVICE_ATTR(event_mode, |
| S_IRUGO | S_IWUSR, |
| adt7310_show_event_mode, adt7310_set_event_mode, 0); |
| static IIO_DEVICE_ATTR(available_event_modes, |
| S_IRUGO | S_IWUSR, |
| adt7310_show_available_event_modes, NULL, 0); |
| static IIO_DEVICE_ATTR(fault_queue, |
| S_IRUGO | S_IWUSR, |
| adt7310_show_fault_queue, adt7310_set_fault_queue, 0); |
| static IIO_DEVICE_ATTR(t_alarm_high, |
| S_IRUGO | S_IWUSR, |
| adt7310_show_t_alarm_high, adt7310_set_t_alarm_high, 0); |
| static IIO_DEVICE_ATTR(t_alarm_low, |
| S_IRUGO | S_IWUSR, |
| adt7310_show_t_alarm_low, adt7310_set_t_alarm_low, 0); |
| static IIO_DEVICE_ATTR(t_crit, |
| S_IRUGO | S_IWUSR, |
| adt7310_show_t_crit, adt7310_set_t_crit, 0); |
| static IIO_DEVICE_ATTR(t_hyst, |
| S_IRUGO | S_IWUSR, |
| adt7310_show_t_hyst, adt7310_set_t_hyst, 0); |
| |
| static struct attribute *adt7310_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_hyst.dev_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute *adt7310_event_ct_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_crit.dev_attr.attr, |
| &iio_dev_attr_t_hyst.dev_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group adt7310_event_attribute_group[ADT7310_IRQS] = { |
| { |
| .attrs = adt7310_event_int_attributes, |
| .name = "events", |
| }, { |
| .attrs = adt7310_event_ct_attributes, |
| .name = "events", |
| } |
| }; |
| |
| static const struct iio_info adt7310_info = { |
| .attrs = &adt7310_attribute_group, |
| .event_attrs = adt7310_event_attribute_group, |
| .driver_module = THIS_MODULE, |
| }; |
| |
| /* |
| * device probe and remove |
| */ |
| |
| static int __devinit adt7310_probe(struct spi_device *spi_dev) |
| { |
| struct adt7310_chip_info *chip; |
| struct iio_dev *indio_dev; |
| int ret = 0; |
| unsigned long *adt7310_platform_data = spi_dev->dev.platform_data; |
| unsigned long irq_flags; |
| |
| indio_dev = iio_allocate_device(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(&spi_dev->dev, indio_dev); |
| |
| chip->spi_dev = spi_dev; |
| |
| indio_dev->dev.parent = &spi_dev->dev; |
| indio_dev->name = spi_get_device_id(spi_dev)->name; |
| indio_dev->info = &adt7310_info; |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| |
| /* CT critcal temperature event. line 0 */ |
| if (spi_dev->irq) { |
| if (adt7310_platform_data[2]) |
| irq_flags = adt7310_platform_data[2]; |
| else |
| irq_flags = IRQF_TRIGGER_LOW; |
| ret = request_threaded_irq(spi_dev->irq, |
| NULL, |
| &adt7310_event_handler, |
| irq_flags, |
| indio_dev->name, |
| indio_dev); |
| if (ret) |
| goto error_free_dev; |
| } |
| |
| /* INT bound temperature alarm event. line 1 */ |
| if (adt7310_platform_data[0]) { |
| ret = request_threaded_irq(adt7310_platform_data[0], |
| NULL, |
| &adt7310_event_handler, |
| adt7310_platform_data[1], |
| indio_dev->name, |
| indio_dev); |
| if (ret) |
| goto error_unreg_ct_irq; |
| } |
| |
| if (spi_dev->irq && adt7310_platform_data[0]) { |
| ret = adt7310_spi_read_byte(chip, ADT7310_CONFIG, &chip->config); |
| if (ret) { |
| ret = -EIO; |
| goto error_unreg_int_irq; |
| } |
| |
| /* set irq polarity low level */ |
| chip->config &= ~ADT7310_CT_POLARITY; |
| |
| if (adt7310_platform_data[1] & IRQF_TRIGGER_HIGH) |
| chip->config |= ADT7310_INT_POLARITY; |
| else |
| chip->config &= ~ADT7310_INT_POLARITY; |
| |
| ret = adt7310_spi_write_byte(chip, ADT7310_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(&spi_dev->dev, "%s temperature sensor registered.\n", |
| indio_dev->name); |
| |
| return 0; |
| |
| error_unreg_int_irq: |
| free_irq(adt7310_platform_data[0], indio_dev); |
| error_unreg_ct_irq: |
| free_irq(spi_dev->irq, indio_dev); |
| error_free_dev: |
| iio_free_device(indio_dev); |
| error_ret: |
| return ret; |
| } |
| |
| static int __devexit adt7310_remove(struct spi_device *spi_dev) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev); |
| unsigned long *adt7310_platform_data = spi_dev->dev.platform_data; |
| |
| iio_device_unregister(indio_dev); |
| dev_set_drvdata(&spi_dev->dev, NULL); |
| if (adt7310_platform_data[0]) |
| free_irq(adt7310_platform_data[0], indio_dev); |
| if (spi_dev->irq) |
| free_irq(spi_dev->irq, indio_dev); |
| iio_free_device(indio_dev); |
| |
| return 0; |
| } |
| |
| 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", |
| .bus = &spi_bus_type, |
| .owner = THIS_MODULE, |
| }, |
| .probe = adt7310_probe, |
| .remove = __devexit_p(adt7310_remove), |
| .id_table = adt7310_id, |
| }; |
| module_spi_driver(adt7310_driver); |
| |
| MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>"); |
| MODULE_DESCRIPTION("Analog Devices ADT7310 digital" |
| " temperature sensor driver"); |
| MODULE_LICENSE("GPL v2"); |