2010-10-28 01:44:02 +00:00
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/*
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* ADT7410 digital temperature sensor driver supporting ADT7410
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*
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* Copyright 2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include <linux/list.h>
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#include <linux/i2c.h>
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2011-07-03 19:49:50 +00:00
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#include <linux/module.h>
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2010-10-28 01:44:02 +00:00
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#include "../iio.h"
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#include "../sysfs.h"
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2011-10-26 16:41:32 +00:00
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#include "../events.h"
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2010-10-28 01:44:02 +00:00
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/*
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* ADT7410 registers definition
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*/
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#define ADT7410_TEMPERATURE 0
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#define ADT7410_STATUS 2
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#define ADT7410_CONFIG 3
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#define ADT7410_T_ALARM_HIGH 4
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#define ADT7410_T_ALARM_LOW 6
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#define ADT7410_T_CRIT 8
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#define ADT7410_T_HYST 0xA
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#define ADT7410_ID 0xB
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#define ADT7410_RESET 0x2F
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/*
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* ADT7410 status
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*/
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#define ADT7410_STAT_T_LOW 0x10
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#define ADT7410_STAT_T_HIGH 0x20
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#define ADT7410_STAT_T_CRIT 0x40
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#define ADT7410_STAT_NOT_RDY 0x80
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/*
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* ADT7410 config
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*/
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#define ADT7410_FAULT_QUEUE_MASK 0x3
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#define ADT7410_CT_POLARITY 0x4
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#define ADT7410_INT_POLARITY 0x8
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#define ADT7410_EVENT_MODE 0x10
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#define ADT7410_MODE_MASK 0x60
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#define ADT7410_ONESHOT 0x20
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#define ADT7410_SPS 0x40
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#define ADT7410_PD 0x60
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#define ADT7410_RESOLUTION 0x80
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/*
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* ADT7410 masks
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*/
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#define ADT7410_T16_VALUE_SIGN 0x8000
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#define ADT7410_T16_VALUE_FLOAT_OFFSET 7
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#define ADT7410_T16_VALUE_FLOAT_MASK 0x7F
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#define ADT7410_T13_VALUE_SIGN 0x1000
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#define ADT7410_T13_VALUE_OFFSET 3
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#define ADT7410_T13_VALUE_FLOAT_OFFSET 4
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#define ADT7410_T13_VALUE_FLOAT_MASK 0xF
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#define ADT7410_T_HYST_MASK 0xF
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#define ADT7410_DEVICE_ID_MASK 0xF
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#define ADT7410_MANUFACTORY_ID_MASK 0xF0
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#define ADT7410_MANUFACTORY_ID_OFFSET 4
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#define ADT7410_IRQS 2
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/*
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* struct adt7410_chip_info - chip specifc information
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*/
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struct adt7410_chip_info {
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struct i2c_client *client;
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u8 config;
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};
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/*
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* adt7410 register access by I2C
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*/
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static int adt7410_i2c_read_word(struct adt7410_chip_info *chip, u8 reg, u16 *data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_read_word_data(client, reg);
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if (ret < 0) {
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dev_err(&client->dev, "I2C read error\n");
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return ret;
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}
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*data = swab16((u16)ret);
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return 0;
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}
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static int adt7410_i2c_write_word(struct adt7410_chip_info *chip, u8 reg, u16 data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_write_word_data(client, reg, swab16(data));
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if (ret < 0)
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dev_err(&client->dev, "I2C write error\n");
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return ret;
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}
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static int adt7410_i2c_read_byte(struct adt7410_chip_info *chip, u8 reg, u8 *data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0) {
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dev_err(&client->dev, "I2C read error\n");
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return ret;
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}
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*data = (u8)ret;
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return 0;
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}
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static int adt7410_i2c_write_byte(struct adt7410_chip_info *chip, u8 reg, u8 data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_write_byte_data(client, reg, data);
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if (ret < 0)
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dev_err(&client->dev, "I2C write error\n");
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return ret;
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}
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static ssize_t adt7410_show_mode(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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2011-06-27 12:07:30 +00:00
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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2010-10-28 01:44:02 +00:00
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u8 config;
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config = chip->config & ADT7410_MODE_MASK;
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switch (config) {
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case ADT7410_PD:
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return sprintf(buf, "power-down\n");
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case ADT7410_ONESHOT:
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return sprintf(buf, "one-shot\n");
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case ADT7410_SPS:
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return sprintf(buf, "sps\n");
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default:
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return sprintf(buf, "full\n");
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}
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}
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static ssize_t adt7410_store_mode(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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2011-06-27 12:07:30 +00:00
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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2010-10-28 01:44:02 +00:00
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u16 config;
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int ret;
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ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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config = chip->config & (~ADT7410_MODE_MASK);
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if (strcmp(buf, "power-down"))
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config |= ADT7410_PD;
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else if (strcmp(buf, "one-shot"))
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config |= ADT7410_ONESHOT;
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else if (strcmp(buf, "sps"))
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config |= ADT7410_SPS;
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ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config);
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if (ret)
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return -EIO;
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chip->config = config;
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return ret;
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}
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static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
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adt7410_show_mode,
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adt7410_store_mode,
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0);
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static ssize_t adt7410_show_available_modes(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "full\none-shot\nsps\npower-down\n");
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}
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static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt7410_show_available_modes, NULL, 0);
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static ssize_t adt7410_show_resolution(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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2011-06-27 12:07:30 +00:00
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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2010-10-28 01:44:02 +00:00
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int ret;
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int bits;
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ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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if (chip->config & ADT7410_RESOLUTION)
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bits = 16;
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else
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bits = 13;
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return sprintf(buf, "%d bits\n", bits);
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}
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static ssize_t adt7410_store_resolution(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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2011-06-27 12:07:30 +00:00
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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2010-10-28 01:44:02 +00:00
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unsigned long data;
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u16 config;
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int ret;
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ret = strict_strtoul(buf, 10, &data);
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if (ret)
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return -EINVAL;
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ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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config = chip->config & (~ADT7410_RESOLUTION);
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if (data)
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config |= ADT7410_RESOLUTION;
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ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config);
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if (ret)
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return -EIO;
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chip->config = config;
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return ret;
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}
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static IIO_DEVICE_ATTR(resolution, S_IRUGO | S_IWUSR,
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adt7410_show_resolution,
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adt7410_store_resolution,
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0);
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static ssize_t adt7410_show_id(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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2011-06-27 12:07:30 +00:00
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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2010-10-28 01:44:02 +00:00
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u8 id;
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int ret;
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ret = adt7410_i2c_read_byte(chip, ADT7410_ID, &id);
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if (ret)
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return -EIO;
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return sprintf(buf, "device id: 0x%x\nmanufactory id: 0x%x\n",
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id & ADT7410_DEVICE_ID_MASK,
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(id & ADT7410_MANUFACTORY_ID_MASK) >> ADT7410_MANUFACTORY_ID_OFFSET);
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}
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static IIO_DEVICE_ATTR(id, S_IRUGO | S_IWUSR,
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adt7410_show_id,
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NULL,
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0);
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static ssize_t adt7410_convert_temperature(struct adt7410_chip_info *chip,
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u16 data, char *buf)
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{
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char sign = ' ';
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if (chip->config & ADT7410_RESOLUTION) {
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if (data & ADT7410_T16_VALUE_SIGN) {
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/* convert supplement to positive value */
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data = (u16)((ADT7410_T16_VALUE_SIGN << 1) - (u32)data);
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sign = '-';
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}
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return sprintf(buf, "%c%d.%.7d\n", sign,
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(data >> ADT7410_T16_VALUE_FLOAT_OFFSET),
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(data & ADT7410_T16_VALUE_FLOAT_MASK) * 78125);
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} else {
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if (data & ADT7410_T13_VALUE_SIGN) {
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/* convert supplement to positive value */
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data >>= ADT7410_T13_VALUE_OFFSET;
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data = (ADT7410_T13_VALUE_SIGN << 1) - data;
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sign = '-';
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}
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return sprintf(buf, "%c%d.%.4d\n", sign,
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(data >> ADT7410_T13_VALUE_FLOAT_OFFSET),
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(data & ADT7410_T13_VALUE_FLOAT_MASK) * 625);
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}
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}
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static ssize_t adt7410_show_value(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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2011-06-27 12:07:30 +00:00
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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2010-10-28 01:44:02 +00:00
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u8 status;
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u16 data;
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int ret, i = 0;
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do {
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ret = adt7410_i2c_read_byte(chip, ADT7410_STATUS, &status);
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if (ret)
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return -EIO;
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i++;
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if (i == 10000)
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return -EIO;
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} while (status & ADT7410_STAT_NOT_RDY);
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ret = adt7410_i2c_read_word(chip, ADT7410_TEMPERATURE, &data);
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if (ret)
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return -EIO;
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return adt7410_convert_temperature(chip, data, buf);
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}
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static IIO_DEVICE_ATTR(value, S_IRUGO, adt7410_show_value, NULL, 0);
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static struct attribute *adt7410_attributes[] = {
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&iio_dev_attr_available_modes.dev_attr.attr,
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&iio_dev_attr_mode.dev_attr.attr,
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&iio_dev_attr_resolution.dev_attr.attr,
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&iio_dev_attr_id.dev_attr.attr,
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&iio_dev_attr_value.dev_attr.attr,
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NULL,
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};
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static const struct attribute_group adt7410_attribute_group = {
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.attrs = adt7410_attributes,
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};
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|
|
2011-05-18 13:41:12 +00:00
|
|
|
static irqreturn_t adt7410_event_handler(int irq, void *private)
|
2010-10-28 01:44:02 +00:00
|
|
|
{
|
2011-05-18 13:41:12 +00:00
|
|
|
struct iio_dev *indio_dev = private;
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(indio_dev);
|
2011-05-18 13:41:12 +00:00
|
|
|
s64 timestamp = iio_get_time_ns();
|
2010-10-28 01:44:02 +00:00
|
|
|
u8 status;
|
|
|
|
|
|
|
|
if (adt7410_i2c_read_byte(chip, ADT7410_STATUS, &status))
|
2011-05-18 13:41:12 +00:00
|
|
|
return IRQ_HANDLED;
|
2010-10-28 01:44:02 +00:00
|
|
|
|
|
|
|
if (status & ADT7410_STAT_T_HIGH)
|
2011-08-30 11:41:06 +00:00
|
|
|
iio_push_event(indio_dev,
|
2011-05-18 13:42:17 +00:00
|
|
|
IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
|
|
|
|
IIO_EV_TYPE_THRESH,
|
|
|
|
IIO_EV_DIR_RISING),
|
|
|
|
timestamp);
|
2010-10-28 01:44:02 +00:00
|
|
|
if (status & ADT7410_STAT_T_LOW)
|
2011-08-30 11:41:06 +00:00
|
|
|
iio_push_event(indio_dev,
|
2011-05-18 13:42:17 +00:00
|
|
|
IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
|
|
|
|
IIO_EV_TYPE_THRESH,
|
|
|
|
IIO_EV_DIR_FALLING),
|
|
|
|
timestamp);
|
2010-10-28 01:44:02 +00:00
|
|
|
if (status & ADT7410_STAT_T_CRIT)
|
2011-08-30 11:41:06 +00:00
|
|
|
iio_push_event(indio_dev,
|
2011-05-18 13:42:17 +00:00
|
|
|
IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
|
|
|
|
IIO_EV_TYPE_THRESH,
|
|
|
|
IIO_EV_DIR_RISING),
|
|
|
|
timestamp);
|
2010-10-28 01:44:02 +00:00
|
|
|
|
2011-05-18 13:41:12 +00:00
|
|
|
return IRQ_HANDLED;
|
2010-10-28 01:44:02 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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);
|
2011-06-27 12:07:30 +00:00
|
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
2010-10-28 01:44:02 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2011-05-18 13:41:12 +00:00
|
|
|
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);
|
2010-10-28 01:44:02 +00:00
|
|
|
|
|
|
|
static struct attribute *adt7410_event_int_attributes[] = {
|
2011-05-18 13:41:12 +00:00
|
|
|
&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,
|
2010-10-28 01:44:02 +00:00
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2012-01-29 11:07:04 +00:00
|
|
|
static struct attribute_group adt7410_event_attribute_group = {
|
|
|
|
.attrs = adt7410_event_int_attributes,
|
|
|
|
.name = "events",
|
2010-10-28 01:44:02 +00:00
|
|
|
};
|
|
|
|
|
2011-05-18 13:42:37 +00:00
|
|
|
static const struct iio_info adt7410_info = {
|
|
|
|
.attrs = &adt7410_attribute_group,
|
2012-01-29 11:07:04 +00:00
|
|
|
.event_attrs = &adt7410_event_attribute_group,
|
2011-05-18 13:42:37 +00:00
|
|
|
.driver_module = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2010-10-28 01:44:02 +00:00
|
|
|
/*
|
|
|
|
* device probe and remove
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int __devinit adt7410_probe(struct i2c_client *client,
|
|
|
|
const struct i2c_device_id *id)
|
|
|
|
{
|
|
|
|
struct adt7410_chip_info *chip;
|
2011-06-27 12:07:30 +00:00
|
|
|
struct iio_dev *indio_dev;
|
2010-10-28 01:44:02 +00:00
|
|
|
int ret = 0;
|
|
|
|
unsigned long *adt7410_platform_data = client->dev.platform_data;
|
|
|
|
|
2011-06-27 12:07:30 +00:00
|
|
|
indio_dev = iio_allocate_device(sizeof(*chip));
|
|
|
|
if (indio_dev == NULL) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error_ret;
|
|
|
|
}
|
|
|
|
chip = iio_priv(indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
/* this is only used for device removal purposes */
|
2011-06-27 12:07:30 +00:00
|
|
|
i2c_set_clientdata(client, indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
|
|
|
|
chip->client = client;
|
|
|
|
|
2011-06-27 12:07:30 +00:00
|
|
|
indio_dev->name = id->name;
|
|
|
|
indio_dev->dev.parent = &client->dev;
|
|
|
|
indio_dev->info = &adt7410_info;
|
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
2010-10-28 01:44:02 +00:00
|
|
|
|
|
|
|
/* CT critcal temperature event. line 0 */
|
|
|
|
if (client->irq) {
|
2011-05-18 13:41:12 +00:00
|
|
|
ret = request_threaded_irq(client->irq,
|
|
|
|
NULL,
|
|
|
|
&adt7410_event_handler,
|
|
|
|
IRQF_TRIGGER_LOW,
|
2011-05-18 13:41:44 +00:00
|
|
|
id->name,
|
2011-06-27 12:07:30 +00:00
|
|
|
indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
if (ret)
|
2011-09-02 16:14:40 +00:00
|
|
|
goto error_free_dev;
|
2010-10-28 01:44:02 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* INT bound temperature alarm event. line 1 */
|
|
|
|
if (adt7410_platform_data[0]) {
|
2011-05-18 13:41:12 +00:00
|
|
|
ret = request_threaded_irq(adt7410_platform_data[0],
|
|
|
|
NULL,
|
|
|
|
&adt7410_event_handler,
|
|
|
|
adt7410_platform_data[1],
|
2011-05-18 13:41:44 +00:00
|
|
|
id->name,
|
2011-06-27 12:07:30 +00:00
|
|
|
indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
if (ret)
|
|
|
|
goto error_unreg_ct_irq;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (client->irq && adt7410_platform_data[0]) {
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
2011-09-02 16:14:40 +00:00
|
|
|
ret = iio_device_register(indio_dev);
|
|
|
|
if (ret)
|
|
|
|
goto error_unreg_int_irq;
|
2010-10-28 01:44:02 +00:00
|
|
|
|
|
|
|
dev_info(&client->dev, "%s temperature sensor registered.\n",
|
|
|
|
id->name);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error_unreg_int_irq:
|
2011-06-27 12:07:30 +00:00
|
|
|
free_irq(adt7410_platform_data[0], indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
error_unreg_ct_irq:
|
2011-06-27 12:07:30 +00:00
|
|
|
free_irq(client->irq, indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
error_free_dev:
|
2011-06-27 12:07:30 +00:00
|
|
|
iio_free_device(indio_dev);
|
|
|
|
error_ret:
|
2010-10-28 01:44:02 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __devexit adt7410_remove(struct i2c_client *client)
|
|
|
|
{
|
2011-06-27 12:07:30 +00:00
|
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
2010-10-28 01:44:02 +00:00
|
|
|
unsigned long *adt7410_platform_data = client->dev.platform_data;
|
|
|
|
|
2011-10-14 13:46:58 +00:00
|
|
|
iio_device_unregister(indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
if (adt7410_platform_data[0])
|
2011-06-27 12:07:30 +00:00
|
|
|
free_irq(adt7410_platform_data[0], indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
if (client->irq)
|
2011-06-27 12:07:30 +00:00
|
|
|
free_irq(client->irq, indio_dev);
|
2011-10-14 13:46:58 +00:00
|
|
|
iio_free_device(indio_dev);
|
2010-10-28 01:44:02 +00:00
|
|
|
|
|
|
|
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,
|
|
|
|
};
|
2011-11-16 09:13:38 +00:00
|
|
|
module_i2c_driver(adt7410_driver);
|
2010-10-28 01:44:02 +00:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
|
|
|
|
MODULE_DESCRIPTION("Analog Devices ADT7410 digital"
|
|
|
|
" temperature sensor driver");
|
|
|
|
MODULE_LICENSE("GPL v2");
|