907 lines
21 KiB
C
907 lines
21 KiB
C
/*
|
|
* 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;
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret)
|
|
goto error_free_dev;
|
|
|
|
/* 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_unreg_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;
|
|
}
|
|
}
|
|
|
|
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_unreg_dev:
|
|
iio_device_unregister(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;
|
|
|
|
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_device_unregister(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,
|
|
};
|
|
|
|
static __init int adt7310_init(void)
|
|
{
|
|
return spi_register_driver(&adt7310_driver);
|
|
}
|
|
|
|
static __exit void adt7310_exit(void)
|
|
{
|
|
spi_unregister_driver(&adt7310_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
|
|
MODULE_DESCRIPTION("Analog Devices ADT7310 digital"
|
|
" temperature sensor driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
module_init(adt7310_init);
|
|
module_exit(adt7310_exit);
|