adt7316.c

Go to the documentation of this file.

/*
 * ADT7316 digital temperature sensor driver supporting ADT7316/7/8 ADT7516/7/9
 *
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/workqueue.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/list.h>
#include <linux/i2c.h>
#include <linux/rtc.h>
#include <linux/module.h>

#include <linux/iio/iio.h>
#include <linux/iio/events.h>
#include <linux/iio/sysfs.h>
#include "adt7316.h"

/*
 * ADT7316 registers definition
 */
#define ADT7316_INT_STAT1       0x0
#define ADT7316_INT_STAT2       0x1
#define ADT7316_LSB_IN_TEMP_VDD     0x3
#define ADT7316_LSB_IN_TEMP_MASK    0x3
#define ADT7316_LSB_VDD_MASK        0xC
#define ADT7316_LSB_VDD_OFFSET      2
#define ADT7316_LSB_EX_TEMP_AIN     0x4
#define ADT7316_LSB_EX_TEMP_MASK    0x3
#define ADT7516_LSB_AIN_SHIFT       2
#define ADT7316_AD_MSB_DATA_BASE        0x6
#define ADT7316_AD_MSB_DATA_REGS        3
#define ADT7516_AD_MSB_DATA_REGS        6
#define ADT7316_MSB_VDD         0x6
#define ADT7316_MSB_IN_TEMP     0x7
#define ADT7316_MSB_EX_TEMP     0x8
#define ADT7516_MSB_AIN1        0x8
#define ADT7516_MSB_AIN2        0x9
#define ADT7516_MSB_AIN3        0xA
#define ADT7516_MSB_AIN4        0xB
#define ADT7316_DA_DATA_BASE        0x10
#define ADT7316_DA_MSB_DATA_REGS    4
#define ADT7316_LSB_DAC_A       0x10
#define ADT7316_MSB_DAC_A       0x11
#define ADT7316_LSB_DAC_B       0x12
#define ADT7316_MSB_DAC_B       0x13
#define ADT7316_LSB_DAC_C       0x14
#define ADT7316_MSB_DAC_C       0x15
#define ADT7316_LSB_DAC_D       0x16
#define ADT7316_MSB_DAC_D       0x17
#define ADT7316_CONFIG1         0x18
#define ADT7316_CONFIG2         0x19
#define ADT7316_CONFIG3         0x1A
#define ADT7316_LDAC_CONFIG     0x1B
#define ADT7316_DAC_CONFIG      0x1C
#define ADT7316_INT_MASK1       0x1D
#define ADT7316_INT_MASK2       0x1E
#define ADT7316_IN_TEMP_OFFSET      0x1F
#define ADT7316_EX_TEMP_OFFSET      0x20
#define ADT7316_IN_ANALOG_TEMP_OFFSET   0x21
#define ADT7316_EX_ANALOG_TEMP_OFFSET   0x22
#define ADT7316_VDD_HIGH        0x23
#define ADT7316_VDD_LOW         0x24
#define ADT7316_IN_TEMP_HIGH        0x25
#define ADT7316_IN_TEMP_LOW     0x26
#define ADT7316_EX_TEMP_HIGH        0x27
#define ADT7316_EX_TEMP_LOW     0x28
#define ADT7516_AIN2_HIGH       0x2B
#define ADT7516_AIN2_LOW        0x2C
#define ADT7516_AIN3_HIGH       0x2D
#define ADT7516_AIN3_LOW        0x2E
#define ADT7516_AIN4_HIGH       0x2F
#define ADT7516_AIN4_LOW        0x30
#define ADT7316_DEVICE_ID       0x4D
#define ADT7316_MANUFACTURE_ID      0x4E
#define ADT7316_DEVICE_REV      0x4F
#define ADT7316_SPI_LOCK_STAT       0x7F

/*
 * ADT7316 config1
 */
#define ADT7316_EN          0x1
#define ADT7516_SEL_EX_TEMP     0x4
#define ADT7516_SEL_AIN1_2_EX_TEMP_MASK 0x6
#define ADT7516_SEL_AIN3        0x8
#define ADT7316_INT_EN          0x20
#define ADT7316_INT_POLARITY        0x40
#define ADT7316_PD          0x80

/*
 * ADT7316 config2
 */
#define ADT7316_AD_SINGLE_CH_MASK   0x3
#define ADT7516_AD_SINGLE_CH_MASK   0x7
#define ADT7316_AD_SINGLE_CH_VDD    0
#define ADT7316_AD_SINGLE_CH_IN     1
#define ADT7316_AD_SINGLE_CH_EX     2
#define ADT7516_AD_SINGLE_CH_AIN1   2
#define ADT7516_AD_SINGLE_CH_AIN2   3
#define ADT7516_AD_SINGLE_CH_AIN3   4
#define ADT7516_AD_SINGLE_CH_AIN4   5
#define ADT7316_AD_SINGLE_CH_MODE   0x10
#define ADT7316_DISABLE_AVERAGING   0x20
#define ADT7316_EN_SMBUS_TIMEOUT    0x40
#define ADT7316_RESET           0x80

/*
 * ADT7316 config3
 */
#define ADT7316_ADCLK_22_5      0x1
#define ADT7316_DA_HIGH_RESOLUTION  0x2
#define ADT7316_DA_EN_VIA_DAC_LDCA  0x4
#define ADT7516_AIN_IN_VREF     0x10
#define ADT7316_EN_IN_TEMP_PROP_DACA    0x20
#define ADT7316_EN_EX_TEMP_PROP_DACB    0x40

/*
 * ADT7316 DAC config
 */
#define ADT7316_DA_2VREF_CH_MASK    0xF
#define ADT7316_DA_EN_MODE_MASK     0x30
#define ADT7316_DA_EN_MODE_SINGLE   0x00
#define ADT7316_DA_EN_MODE_AB_CD    0x10
#define ADT7316_DA_EN_MODE_ABCD     0x20
#define ADT7316_DA_EN_MODE_LDAC     0x30
#define ADT7316_VREF_BYPASS_DAC_AB  0x40
#define ADT7316_VREF_BYPASS_DAC_CD  0x80

/*
 * ADT7316 LDAC config
 */
#define ADT7316_LDAC_EN_DA_MASK     0xF
#define ADT7316_DAC_IN_VREF     0x10
#define ADT7516_DAC_AB_IN_VREF      0x10
#define ADT7516_DAC_CD_IN_VREF      0x20
#define ADT7516_DAC_IN_VREF_OFFSET  4
#define ADT7516_DAC_IN_VREF_MASK    0x30

/*
 * ADT7316 INT_MASK2
 */
#define ADT7316_INT_MASK2_VDD       0x10

/*
 * ADT7316 value masks
 */
#define ADT7316_VALUE_MASK      0xfff
#define ADT7316_T_VALUE_SIGN        0x400
#define ADT7316_T_VALUE_FLOAT_OFFSET    2
#define ADT7316_T_VALUE_FLOAT_MASK  0x2

/*
 * Chip ID
 */
#define ID_ADT7316      0x1
#define ID_ADT7317      0x2
#define ID_ADT7318      0x3
#define ID_ADT7516      0x11
#define ID_ADT7517      0x12
#define ID_ADT7519      0x14

#define ID_FAMILY_MASK      0xF0
#define ID_ADT73XX      0x0
#define ID_ADT75XX      0x10

/*
 * struct adt7316_chip_info - chip specifc information
 */

struct adt7316_chip_info {
    struct adt7316_bus  bus;
    u16         ldac_pin;
    u16         int_mask;   /* 0x2f */
    u8          config1;
    u8          config2;
    u8          config3;
    u8          dac_config; /* DAC config */
    u8          ldac_config;    /* LDAC config */
    u8          dac_bits;   /* 8, 10, 12 */
    u8          id;     /* chip id */
};

/*
 * Logic interrupt mask for user application to enable
 * interrupts.
 */
#define ADT7316_IN_TEMP_HIGH_INT_MASK   0x1
#define ADT7316_IN_TEMP_LOW_INT_MASK    0x2
#define ADT7316_EX_TEMP_HIGH_INT_MASK   0x4
#define ADT7316_EX_TEMP_LOW_INT_MASK    0x8
#define ADT7316_EX_TEMP_FAULT_INT_MASK  0x10
#define ADT7516_AIN1_INT_MASK       0x4
#define ADT7516_AIN2_INT_MASK       0x20
#define ADT7516_AIN3_INT_MASK       0x40
#define ADT7516_AIN4_INT_MASK       0x80
#define ADT7316_VDD_INT_MASK        0x100
#define ADT7316_TEMP_INT_MASK       0x1F
#define ADT7516_AIN_INT_MASK        0xE0
#define ADT7316_TEMP_AIN_INT_MASK   \
    (ADT7316_TEMP_INT_MASK)

/*
 * struct adt7316_chip_info - chip specifc information
 */

struct adt7316_limit_regs {
    u16 data_high;
    u16 data_low;
};

static ssize_t adt7316_show_enabled(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n", !!(chip->config1 & ADT7316_EN));
}

static ssize_t _adt7316_store_enabled(struct adt7316_chip_info *chip,
        int enable)
{
    u8 config1;
    int ret;

    if (enable)
        config1 = chip->config1 | ADT7316_EN;
    else
        config1 = chip->config1 & ~ADT7316_EN;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
    if (ret)
        return -EIO;

    chip->config1 = config1;

    return ret;

}

static ssize_t adt7316_store_enabled(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    int enable;

    if (!memcmp(buf, "1", 1))
        enable = 1;
    else
        enable = 0;

    if (_adt7316_store_enabled(chip, enable) < 0)
        return -EIO;
    else
        return len;
}

static IIO_DEVICE_ATTR(enabled, S_IRUGO | S_IWUSR,
        adt7316_show_enabled,
        adt7316_store_enabled,
        0);

static ssize_t adt7316_show_select_ex_temp(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
        return -EPERM;

    return sprintf(buf, "%d\n", !!(chip->config1 & ADT7516_SEL_EX_TEMP));
}

static ssize_t adt7316_store_select_ex_temp(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config1;
    int ret;

    if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
        return -EPERM;

    config1 = chip->config1 & (~ADT7516_SEL_EX_TEMP);
    if (!memcmp(buf, "1", 1))
        config1 |= ADT7516_SEL_EX_TEMP;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
    if (ret)
        return -EIO;

    chip->config1 = config1;

    return len;
}

static IIO_DEVICE_ATTR(select_ex_temp, S_IRUGO | S_IWUSR,
        adt7316_show_select_ex_temp,
        adt7316_store_select_ex_temp,
        0);

static ssize_t adt7316_show_mode(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if (chip->config2 & ADT7316_AD_SINGLE_CH_MODE)
        return sprintf(buf, "single_channel\n");
    else
        return sprintf(buf, "round_robin\n");
}

static ssize_t adt7316_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 adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config2;
    int ret;

    config2 = chip->config2 & (~ADT7316_AD_SINGLE_CH_MODE);
    if (!memcmp(buf, "single_channel", 14))
        config2 |= ADT7316_AD_SINGLE_CH_MODE;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
    if (ret)
        return -EIO;

    chip->config2 = config2;

    return len;
}

static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
        adt7316_show_mode,
        adt7316_store_mode,
        0);

static ssize_t adt7316_show_all_modes(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    return sprintf(buf, "single_channel\nround_robin\n");
}

static IIO_DEVICE_ATTR(all_modes, S_IRUGO, adt7316_show_all_modes, NULL, 0);

static ssize_t adt7316_show_ad_channel(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if (!(chip->config2 & ADT7316_AD_SINGLE_CH_MODE))
        return -EPERM;

    switch (chip->config2 & ADT7516_AD_SINGLE_CH_MASK) {
    case ADT7316_AD_SINGLE_CH_VDD:
        return sprintf(buf, "0 - VDD\n");
    case ADT7316_AD_SINGLE_CH_IN:
        return sprintf(buf, "1 - Internal Temperature\n");
    case ADT7316_AD_SINGLE_CH_EX:
        if (((chip->id & ID_FAMILY_MASK) == ID_ADT75XX) &&
            (chip->config1 & ADT7516_SEL_AIN1_2_EX_TEMP_MASK) == 0)
            return sprintf(buf, "2 - AIN1\n");
        else
            return sprintf(buf, "2 - External Temperature\n");
    case ADT7516_AD_SINGLE_CH_AIN2:
        if ((chip->config1 & ADT7516_SEL_AIN1_2_EX_TEMP_MASK) == 0)
            return sprintf(buf, "3 - AIN2\n");
        else
            return sprintf(buf, "N/A\n");
    case ADT7516_AD_SINGLE_CH_AIN3:
        if (chip->config1 & ADT7516_SEL_AIN3)
            return sprintf(buf, "4 - AIN3\n");
        else
            return sprintf(buf, "N/A\n");
    case ADT7516_AD_SINGLE_CH_AIN4:
        return sprintf(buf, "5 - AIN4\n");
    default:
        return sprintf(buf, "N/A\n");
    }
}

static ssize_t adt7316_store_ad_channel(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config2;
    unsigned long data = 0;
    int ret;

    if (!(chip->config2 & ADT7316_AD_SINGLE_CH_MODE))
        return -EPERM;

    ret = strict_strtoul(buf, 10, &data);
    if (ret)
        return -EINVAL;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX) {
        if (data > 5)
            return -EINVAL;

        config2 = chip->config2 & (~ADT7516_AD_SINGLE_CH_MASK);
    } else {
        if (data > 2)
            return -EINVAL;

        config2 = chip->config2 & (~ADT7316_AD_SINGLE_CH_MASK);
    }


    config2 |= data;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
    if (ret)
        return -EIO;

    chip->config2 = config2;

    return len;
}

static IIO_DEVICE_ATTR(ad_channel, S_IRUGO | S_IWUSR,
        adt7316_show_ad_channel,
        adt7316_store_ad_channel,
        0);

static ssize_t adt7316_show_all_ad_channels(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if (!(chip->config2 & ADT7316_AD_SINGLE_CH_MODE))
        return -EPERM;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        return sprintf(buf, "0 - VDD\n1 - Internal Temperature\n"
                "2 - External Temperature or AIN1\n"
                "3 - AIN2\n4 - AIN3\n5 - AIN4\n");
    else
        return sprintf(buf, "0 - VDD\n1 - Internal Temperature\n"
                "2 - External Temperature\n");
}

static IIO_DEVICE_ATTR(all_ad_channels, S_IRUGO,
        adt7316_show_all_ad_channels, NULL, 0);

static ssize_t adt7316_show_disable_averaging(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n",
        !!(chip->config2 & ADT7316_DISABLE_AVERAGING));
}

static ssize_t adt7316_store_disable_averaging(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config2;
    int ret;

    config2 = chip->config2 & (~ADT7316_DISABLE_AVERAGING);
    if (!memcmp(buf, "1", 1))
        config2 |= ADT7316_DISABLE_AVERAGING;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
    if (ret)
        return -EIO;

    chip->config2 = config2;

    return len;
}

static IIO_DEVICE_ATTR(disable_averaging, S_IRUGO | S_IWUSR,
        adt7316_show_disable_averaging,
        adt7316_store_disable_averaging,
        0);

static ssize_t adt7316_show_enable_smbus_timeout(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n",
        !!(chip->config2 & ADT7316_EN_SMBUS_TIMEOUT));
}

static ssize_t adt7316_store_enable_smbus_timeout(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config2;
    int ret;

    config2 = chip->config2 & (~ADT7316_EN_SMBUS_TIMEOUT);
    if (!memcmp(buf, "1", 1))
        config2 |= ADT7316_EN_SMBUS_TIMEOUT;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
    if (ret)
        return -EIO;

    chip->config2 = config2;

    return len;
}

static IIO_DEVICE_ATTR(enable_smbus_timeout, S_IRUGO | S_IWUSR,
        adt7316_show_enable_smbus_timeout,
        adt7316_store_enable_smbus_timeout,
        0);


static ssize_t adt7316_store_reset(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config2;
    int ret;

    config2 = chip->config2 | ADT7316_RESET;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
    if (ret)
        return -EIO;

    return len;
}

static IIO_DEVICE_ATTR(reset, S_IWUSR,
        NULL,
        adt7316_store_reset,
        0);

static ssize_t adt7316_show_powerdown(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n", !!(chip->config1 & ADT7316_PD));
}

static ssize_t adt7316_store_powerdown(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config1;
    int ret;

    config1 = chip->config1 & (~ADT7316_PD);
    if (!memcmp(buf, "1", 1))
        config1 |= ADT7316_PD;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
    if (ret)
        return -EIO;

    chip->config1 = config1;

    return len;
}

static IIO_DEVICE_ATTR(powerdown, S_IRUGO | S_IWUSR,
        adt7316_show_powerdown,
        adt7316_store_powerdown,
        0);

static ssize_t adt7316_show_fast_ad_clock(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n", !!(chip->config3 & ADT7316_ADCLK_22_5));
}

static ssize_t adt7316_store_fast_ad_clock(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config3;
    int ret;

    config3 = chip->config3 & (~ADT7316_ADCLK_22_5);
    if (!memcmp(buf, "1", 1))
        config3 |= ADT7316_ADCLK_22_5;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
    if (ret)
        return -EIO;

    chip->config3 = config3;

    return len;
}

static IIO_DEVICE_ATTR(fast_ad_clock, S_IRUGO | S_IWUSR,
        adt7316_show_fast_ad_clock,
        adt7316_store_fast_ad_clock,
        0);

static ssize_t adt7316_show_da_high_resolution(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if (chip->config3 & ADT7316_DA_HIGH_RESOLUTION) {
        if (chip->id == ID_ADT7316 || chip->id == ID_ADT7516)
            return sprintf(buf, "1 (12 bits)\n");
        else if (chip->id == ID_ADT7317 || chip->id == ID_ADT7517)
            return sprintf(buf, "1 (10 bits)\n");
    }

    return sprintf(buf, "0 (8 bits)\n");
}

static ssize_t adt7316_store_da_high_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 adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config3;
    int ret;

    chip->dac_bits = 8;

    if (!memcmp(buf, "1", 1)) {
        config3 = chip->config3 | ADT7316_DA_HIGH_RESOLUTION;
        if (chip->id == ID_ADT7316 || chip->id == ID_ADT7516)
            chip->dac_bits = 12;
        else if (chip->id == ID_ADT7317 || chip->id == ID_ADT7517)
            chip->dac_bits = 10;
    } else
        config3 = chip->config3 & (~ADT7316_DA_HIGH_RESOLUTION);

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
    if (ret)
        return -EIO;

    chip->config3 = config3;

    return len;
}

static IIO_DEVICE_ATTR(da_high_resolution, S_IRUGO | S_IWUSR,
        adt7316_show_da_high_resolution,
        adt7316_store_da_high_resolution,
        0);

static ssize_t adt7316_show_AIN_internal_Vref(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
        return -EPERM;

    return sprintf(buf, "%d\n",
        !!(chip->config3 & ADT7516_AIN_IN_VREF));
}

static ssize_t adt7316_store_AIN_internal_Vref(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config3;
    int ret;

    if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
        return -EPERM;

    if (memcmp(buf, "1", 1))
        config3 = chip->config3 & (~ADT7516_AIN_IN_VREF);
    else
        config3 = chip->config3 | ADT7516_AIN_IN_VREF;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
    if (ret)
        return -EIO;

    chip->config3 = config3;

    return len;
}

static IIO_DEVICE_ATTR(AIN_internal_Vref, S_IRUGO | S_IWUSR,
        adt7316_show_AIN_internal_Vref,
        adt7316_store_AIN_internal_Vref,
        0);


static ssize_t adt7316_show_enable_prop_DACA(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n",
        !!(chip->config3 & ADT7316_EN_IN_TEMP_PROP_DACA));
}

static ssize_t adt7316_store_enable_prop_DACA(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config3;
    int ret;

    config3 = chip->config3 & (~ADT7316_EN_IN_TEMP_PROP_DACA);
    if (!memcmp(buf, "1", 1))
        config3 |= ADT7316_EN_IN_TEMP_PROP_DACA;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
    if (ret)
        return -EIO;

    chip->config3 = config3;

    return len;
}

static IIO_DEVICE_ATTR(enable_proportion_DACA, S_IRUGO | S_IWUSR,
        adt7316_show_enable_prop_DACA,
        adt7316_store_enable_prop_DACA,
        0);

static ssize_t adt7316_show_enable_prop_DACB(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n",
        !!(chip->config3 & ADT7316_EN_EX_TEMP_PROP_DACB));
}

static ssize_t adt7316_store_enable_prop_DACB(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config3;
    int ret;

    config3 = chip->config3 & (~ADT7316_EN_EX_TEMP_PROP_DACB);
    if (!memcmp(buf, "1", 1))
        config3 |= ADT7316_EN_EX_TEMP_PROP_DACB;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
    if (ret)
        return -EIO;

    chip->config3 = config3;

    return len;
}

static IIO_DEVICE_ATTR(enable_proportion_DACB, S_IRUGO | S_IWUSR,
        adt7316_show_enable_prop_DACB,
        adt7316_store_enable_prop_DACB,
        0);

static ssize_t adt7316_show_DAC_2Vref_ch_mask(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "0x%x\n",
        chip->dac_config & ADT7316_DA_2VREF_CH_MASK);
}

static ssize_t adt7316_store_DAC_2Vref_ch_mask(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 dac_config;
    unsigned long data = 0;
    int ret;

    ret = strict_strtoul(buf, 16, &data);
    if (ret || data > ADT7316_DA_2VREF_CH_MASK)
        return -EINVAL;

    dac_config = chip->dac_config & (~ADT7316_DA_2VREF_CH_MASK);
    dac_config |= data;

    ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
    if (ret)
        return -EIO;

    chip->dac_config = dac_config;

    return len;
}

static IIO_DEVICE_ATTR(DAC_2Vref_channels_mask, S_IRUGO | S_IWUSR,
        adt7316_show_DAC_2Vref_ch_mask,
        adt7316_store_DAC_2Vref_ch_mask,
        0);

static ssize_t adt7316_show_DAC_update_mode(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if (!(chip->config3 & ADT7316_DA_EN_VIA_DAC_LDCA))
        return sprintf(buf, "manual\n");
    else {
        switch (chip->dac_config & ADT7316_DA_EN_MODE_MASK) {
        case ADT7316_DA_EN_MODE_SINGLE:
            return sprintf(buf, "0 - auto at any MSB DAC writing\n");
        case ADT7316_DA_EN_MODE_AB_CD:
            return sprintf(buf, "1 - auto at MSB DAC AB and CD writing\n");
        case ADT7316_DA_EN_MODE_ABCD:
            return sprintf(buf, "2 - auto at MSB DAC ABCD writing\n");
        default: /* ADT7316_DA_EN_MODE_LDAC */
            return sprintf(buf, "3 - manual\n");
        }
    }
}

static ssize_t adt7316_store_DAC_update_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 adt7316_chip_info *chip = iio_priv(dev_info);
    u8 dac_config;
    unsigned long data;
    int ret;

    if (!(chip->config3 & ADT7316_DA_EN_VIA_DAC_LDCA))
        return -EPERM;

    ret = strict_strtoul(buf, 10, &data);
    if (ret || data > ADT7316_DA_EN_MODE_MASK)
        return -EINVAL;

    dac_config = chip->dac_config & (~ADT7316_DA_EN_MODE_MASK);
    dac_config |= data;

    ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
    if (ret)
        return -EIO;

    chip->dac_config = dac_config;

    return len;
}

static IIO_DEVICE_ATTR(DAC_update_mode, S_IRUGO | S_IWUSR,
        adt7316_show_DAC_update_mode,
        adt7316_store_DAC_update_mode,
        0);

static ssize_t adt7316_show_all_DAC_update_modes(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if (chip->config3 & ADT7316_DA_EN_VIA_DAC_LDCA)
        return sprintf(buf, "0 - auto at any MSB DAC writing\n"
                "1 - auto at MSB DAC AB and CD writing\n"
                "2 - auto at MSB DAC ABCD writing\n"
                "3 - manual\n");
    else
        return sprintf(buf, "manual\n");
}

static IIO_DEVICE_ATTR(all_DAC_update_modes, S_IRUGO,
        adt7316_show_all_DAC_update_modes, NULL, 0);


static ssize_t adt7316_store_update_DAC(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 ldac_config;
    unsigned long data;
    int ret;

    if (chip->config3 & ADT7316_DA_EN_VIA_DAC_LDCA) {
        if ((chip->dac_config & ADT7316_DA_EN_MODE_MASK) !=
            ADT7316_DA_EN_MODE_LDAC)
            return -EPERM;

        ret = strict_strtoul(buf, 16, &data);
        if (ret || data > ADT7316_LDAC_EN_DA_MASK)
            return -EINVAL;

        ldac_config = chip->ldac_config & (~ADT7316_LDAC_EN_DA_MASK);
        ldac_config |= data;

        ret = chip->bus.write(chip->bus.client, ADT7316_LDAC_CONFIG,
            ldac_config);
        if (ret)
            return -EIO;
    } else {
        gpio_set_value(chip->ldac_pin, 0);
        gpio_set_value(chip->ldac_pin, 1);
    }

    return len;
}

static IIO_DEVICE_ATTR(update_DAC, S_IRUGO | S_IWUSR,
        NULL,
        adt7316_store_update_DAC,
        0);

static ssize_t adt7316_show_DA_AB_Vref_bypass(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        return -EPERM;

    return sprintf(buf, "%d\n",
        !!(chip->dac_config & ADT7316_VREF_BYPASS_DAC_AB));
}

static ssize_t adt7316_store_DA_AB_Vref_bypass(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 dac_config;
    int ret;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        return -EPERM;

    dac_config = chip->dac_config & (~ADT7316_VREF_BYPASS_DAC_AB);
    if (!memcmp(buf, "1", 1))
        dac_config |= ADT7316_VREF_BYPASS_DAC_AB;

    ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
    if (ret)
        return -EIO;

    chip->dac_config = dac_config;

    return len;
}

static IIO_DEVICE_ATTR(DA_AB_Vref_bypass, S_IRUGO | S_IWUSR,
        adt7316_show_DA_AB_Vref_bypass,
        adt7316_store_DA_AB_Vref_bypass,
        0);

static ssize_t adt7316_show_DA_CD_Vref_bypass(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        return -EPERM;

    return sprintf(buf, "%d\n",
        !!(chip->dac_config & ADT7316_VREF_BYPASS_DAC_CD));
}

static ssize_t adt7316_store_DA_CD_Vref_bypass(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 dac_config;
    int ret;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        return -EPERM;

    dac_config = chip->dac_config & (~ADT7316_VREF_BYPASS_DAC_CD);
    if (!memcmp(buf, "1", 1))
        dac_config |= ADT7316_VREF_BYPASS_DAC_CD;

    ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
    if (ret)
        return -EIO;

    chip->dac_config = dac_config;

    return len;
}

static IIO_DEVICE_ATTR(DA_CD_Vref_bypass, S_IRUGO | S_IWUSR,
        adt7316_show_DA_CD_Vref_bypass,
        adt7316_store_DA_CD_Vref_bypass,
        0);

static ssize_t adt7316_show_DAC_internal_Vref(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        return sprintf(buf, "0x%x\n",
            (chip->dac_config & ADT7516_DAC_IN_VREF_MASK) >>
            ADT7516_DAC_IN_VREF_OFFSET);
    else
        return sprintf(buf, "%d\n",
            !!(chip->dac_config & ADT7316_DAC_IN_VREF));
}

static ssize_t adt7316_store_DAC_internal_Vref(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 ldac_config;
    unsigned long data;
    int ret;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX) {
        ret = strict_strtoul(buf, 16, &data);
        if (ret || data > 3)
            return -EINVAL;

        ldac_config = chip->ldac_config & (~ADT7516_DAC_IN_VREF_MASK);
        if (data & 0x1)
            ldac_config |= ADT7516_DAC_AB_IN_VREF;
        else if (data & 0x2)
            ldac_config |= ADT7516_DAC_CD_IN_VREF;
    } else {
        ret = strict_strtoul(buf, 16, &data);
        if (ret)
            return -EINVAL;

        ldac_config = chip->ldac_config & (~ADT7316_DAC_IN_VREF);
        if (data)
            ldac_config = chip->ldac_config | ADT7316_DAC_IN_VREF;
    }

    ret = chip->bus.write(chip->bus.client, ADT7316_LDAC_CONFIG, ldac_config);
    if (ret)
        return -EIO;

    chip->ldac_config = ldac_config;

    return len;
}

static IIO_DEVICE_ATTR(DAC_internal_Vref, S_IRUGO | S_IWUSR,
        adt7316_show_DAC_internal_Vref,
        adt7316_store_DAC_internal_Vref,
        0);

static ssize_t adt7316_show_ad(struct adt7316_chip_info *chip,
        int channel, char *buf)
{
    u16 data;
    u8 msb, lsb;
    char sign = ' ';
    int ret;

    if ((chip->config2 & ADT7316_AD_SINGLE_CH_MODE) &&
        channel != (chip->config2 & ADT7516_AD_SINGLE_CH_MASK))
        return -EPERM;

    switch (channel) {
    case ADT7316_AD_SINGLE_CH_IN:
        ret = chip->bus.read(chip->bus.client,
            ADT7316_LSB_IN_TEMP_VDD, &lsb);
        if (ret)
            return -EIO;

        ret = chip->bus.read(chip->bus.client,
            ADT7316_AD_MSB_DATA_BASE + channel, &msb);
        if (ret)
            return -EIO;

        data = msb << ADT7316_T_VALUE_FLOAT_OFFSET;
        data |= lsb & ADT7316_LSB_IN_TEMP_MASK;
        break;
    case ADT7316_AD_SINGLE_CH_VDD:
        ret = chip->bus.read(chip->bus.client,
            ADT7316_LSB_IN_TEMP_VDD, &lsb);
        if (ret)
            return -EIO;

        ret = chip->bus.read(chip->bus.client,

            ADT7316_AD_MSB_DATA_BASE + channel, &msb);
        if (ret)
            return -EIO;

        data = msb << ADT7316_T_VALUE_FLOAT_OFFSET;
        data |= (lsb & ADT7316_LSB_VDD_MASK) >> ADT7316_LSB_VDD_OFFSET;
        return sprintf(buf, "%d\n", data);
    default: /* ex_temp and ain */
        ret = chip->bus.read(chip->bus.client,
            ADT7316_LSB_EX_TEMP_AIN, &lsb);
        if (ret)
            return -EIO;

        ret = chip->bus.read(chip->bus.client,
            ADT7316_AD_MSB_DATA_BASE + channel, &msb);
        if (ret)
            return -EIO;

        data = msb << ADT7316_T_VALUE_FLOAT_OFFSET;
        data |= lsb & (ADT7316_LSB_EX_TEMP_MASK <<
            (ADT7516_LSB_AIN_SHIFT * (channel -
            (ADT7316_MSB_EX_TEMP - ADT7316_AD_MSB_DATA_BASE))));

        if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
            return sprintf(buf, "%d\n", data);
        else
            break;
    }

    if (data & ADT7316_T_VALUE_SIGN) {
        /* convert supplement to positive value */
        data = (ADT7316_T_VALUE_SIGN << 1) - data;
        sign = '-';
    }

    return sprintf(buf, "%c%d.%.2d\n", sign,
        (data >> ADT7316_T_VALUE_FLOAT_OFFSET),
        (data & ADT7316_T_VALUE_FLOAT_MASK) * 25);
}

static ssize_t adt7316_show_VDD(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_ad(chip, ADT7316_AD_SINGLE_CH_VDD, buf);
}
static IIO_DEVICE_ATTR(VDD, S_IRUGO, adt7316_show_VDD, NULL, 0);

static ssize_t adt7316_show_in_temp(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_ad(chip, ADT7316_AD_SINGLE_CH_IN, buf);
}

static IIO_DEVICE_ATTR(in_temp, S_IRUGO, adt7316_show_in_temp, NULL, 0);

static ssize_t adt7316_show_ex_temp_AIN1(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_ad(chip, ADT7316_AD_SINGLE_CH_EX, buf);
}

static IIO_DEVICE_ATTR(ex_temp_AIN1, S_IRUGO, adt7316_show_ex_temp_AIN1, NULL, 0);
static IIO_DEVICE_ATTR(ex_temp, S_IRUGO, adt7316_show_ex_temp_AIN1, NULL, 0);

static ssize_t adt7316_show_AIN2(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_ad(chip, ADT7516_AD_SINGLE_CH_AIN2, buf);
}
static IIO_DEVICE_ATTR(AIN2, S_IRUGO, adt7316_show_AIN2, NULL, 0);

static ssize_t adt7316_show_AIN3(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_ad(chip, ADT7516_AD_SINGLE_CH_AIN3, buf);
}
static IIO_DEVICE_ATTR(AIN3, S_IRUGO, adt7316_show_AIN3, NULL, 0);

static ssize_t adt7316_show_AIN4(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_ad(chip, ADT7516_AD_SINGLE_CH_AIN4, buf);
}
static IIO_DEVICE_ATTR(AIN4, S_IRUGO, adt7316_show_AIN4, NULL, 0);

static ssize_t adt7316_show_temp_offset(struct adt7316_chip_info *chip,
        int offset_addr, char *buf)
{
    int data;
    u8 val;
    int ret;

    ret = chip->bus.read(chip->bus.client, offset_addr, &val);
    if (ret)
        return -EIO;

    data = (int)val;
    if (val & 0x80)
        data -= 256;

    return sprintf(buf, "%d\n", data);
}

static ssize_t adt7316_store_temp_offset(struct adt7316_chip_info *chip,
        int offset_addr, const char *buf, size_t len)
{
    long data;
    u8 val;
    int ret;

    ret = strict_strtol(buf, 10, &data);
    if (ret || data > 127 || data < -128)
        return -EINVAL;

    if (data < 0)
        data += 256;

    val = (u8)data;

    ret = chip->bus.write(chip->bus.client, offset_addr, val);
    if (ret)
        return -EIO;

    return len;
}

static ssize_t adt7316_show_in_temp_offset(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_temp_offset(chip, ADT7316_IN_TEMP_OFFSET, buf);
}

static ssize_t adt7316_store_in_temp_offset(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_temp_offset(chip, ADT7316_IN_TEMP_OFFSET, buf, len);
}

static IIO_DEVICE_ATTR(in_temp_offset, S_IRUGO | S_IWUSR,
        adt7316_show_in_temp_offset,
        adt7316_store_in_temp_offset, 0);

static ssize_t adt7316_show_ex_temp_offset(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_temp_offset(chip, ADT7316_EX_TEMP_OFFSET, buf);
}

static ssize_t adt7316_store_ex_temp_offset(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_temp_offset(chip, ADT7316_EX_TEMP_OFFSET, buf, len);
}

static IIO_DEVICE_ATTR(ex_temp_offset, S_IRUGO | S_IWUSR,
        adt7316_show_ex_temp_offset,
        adt7316_store_ex_temp_offset, 0);

static ssize_t adt7316_show_in_analog_temp_offset(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_temp_offset(chip,
            ADT7316_IN_ANALOG_TEMP_OFFSET, buf);
}

static ssize_t adt7316_store_in_analog_temp_offset(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_temp_offset(chip,
            ADT7316_IN_ANALOG_TEMP_OFFSET, buf, len);
}

static IIO_DEVICE_ATTR(in_analog_temp_offset, S_IRUGO | S_IWUSR,
        adt7316_show_in_analog_temp_offset,
        adt7316_store_in_analog_temp_offset, 0);

static ssize_t adt7316_show_ex_analog_temp_offset(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_temp_offset(chip,
            ADT7316_EX_ANALOG_TEMP_OFFSET, buf);
}

static ssize_t adt7316_store_ex_analog_temp_offset(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_temp_offset(chip,
            ADT7316_EX_ANALOG_TEMP_OFFSET, buf, len);
}

static IIO_DEVICE_ATTR(ex_analog_temp_offset, S_IRUGO | S_IWUSR,
        adt7316_show_ex_analog_temp_offset,
        adt7316_store_ex_analog_temp_offset, 0);

static ssize_t adt7316_show_DAC(struct adt7316_chip_info *chip,
        int channel, char *buf)
{
    u16 data;
    u8 msb, lsb, offset;
    int ret;

    if (channel >= ADT7316_DA_MSB_DATA_REGS ||
        (channel == 0 &&
        (chip->config3 & ADT7316_EN_IN_TEMP_PROP_DACA)) ||
        (channel == 1 &&
        (chip->config3 & ADT7316_EN_EX_TEMP_PROP_DACB)))
        return -EPERM;

    offset = chip->dac_bits - 8;

    if (chip->dac_bits > 8) {
        ret = chip->bus.read(chip->bus.client,
            ADT7316_DA_DATA_BASE + channel * 2, &lsb);
        if (ret)
            return -EIO;
    }

    ret = chip->bus.read(chip->bus.client,
        ADT7316_DA_DATA_BASE + 1 + channel * 2, &msb);
    if (ret)
        return -EIO;

    data = (msb << offset) + (lsb & ((1 << offset) - 1));

    return sprintf(buf, "%d\n", data);
}

static ssize_t adt7316_store_DAC(struct adt7316_chip_info *chip,
        int channel, const char *buf, size_t len)
{
    u8 msb, lsb, offset;
    unsigned long data;
    int ret;

    if (channel >= ADT7316_DA_MSB_DATA_REGS ||
        (channel == 0 &&
        (chip->config3 & ADT7316_EN_IN_TEMP_PROP_DACA)) ||
        (channel == 1 &&
        (chip->config3 & ADT7316_EN_EX_TEMP_PROP_DACB)))
        return -EPERM;

    offset = chip->dac_bits - 8;

    ret = strict_strtoul(buf, 10, &data);
    if (ret || data >= (1 << chip->dac_bits))
        return -EINVAL;

    if (chip->dac_bits > 8) {
        lsb = data & (1 << offset);
        ret = chip->bus.write(chip->bus.client,
            ADT7316_DA_DATA_BASE + channel * 2, lsb);
        if (ret)
            return -EIO;
    }

    msb = data >> offset;
    ret = chip->bus.write(chip->bus.client,
        ADT7316_DA_DATA_BASE + 1 + channel * 2, msb);
    if (ret)
        return -EIO;

    return len;
}

static ssize_t adt7316_show_DAC_A(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_DAC(chip, 0, buf);
}

static ssize_t adt7316_store_DAC_A(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_DAC(chip, 0, buf, len);
}

static IIO_DEVICE_ATTR(DAC_A, S_IRUGO | S_IWUSR, adt7316_show_DAC_A,
        adt7316_store_DAC_A, 0);

static ssize_t adt7316_show_DAC_B(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_DAC(chip, 1, buf);
}

static ssize_t adt7316_store_DAC_B(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_DAC(chip, 1, buf, len);
}

static IIO_DEVICE_ATTR(DAC_B, S_IRUGO | S_IWUSR, adt7316_show_DAC_B,
        adt7316_store_DAC_B, 0);

static ssize_t adt7316_show_DAC_C(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_DAC(chip, 2, buf);
}

static ssize_t adt7316_store_DAC_C(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_DAC(chip, 2, buf, len);
}

static IIO_DEVICE_ATTR(DAC_C, S_IRUGO | S_IWUSR, adt7316_show_DAC_C,
        adt7316_store_DAC_C, 0);

static ssize_t adt7316_show_DAC_D(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_show_DAC(chip, 3, buf);
}

static ssize_t adt7316_store_DAC_D(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return adt7316_store_DAC(chip, 3, buf, len);
}

static IIO_DEVICE_ATTR(DAC_D, S_IRUGO | S_IWUSR, adt7316_show_DAC_D,
        adt7316_store_DAC_D, 0);

static ssize_t adt7316_show_device_id(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 id;
    int ret;

    ret = chip->bus.read(chip->bus.client, ADT7316_DEVICE_ID, &id);
    if (ret)
        return -EIO;

    return sprintf(buf, "%d\n", id);
}

static IIO_DEVICE_ATTR(device_id, S_IRUGO, adt7316_show_device_id, NULL, 0);

static ssize_t adt7316_show_manufactorer_id(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 id;
    int ret;

    ret = chip->bus.read(chip->bus.client, ADT7316_MANUFACTURE_ID, &id);
    if (ret)
        return -EIO;

    return sprintf(buf, "%d\n", id);
}

static IIO_DEVICE_ATTR(manufactorer_id, S_IRUGO,
        adt7316_show_manufactorer_id, NULL, 0);

static ssize_t adt7316_show_device_rev(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 rev;
    int ret;

    ret = chip->bus.read(chip->bus.client, ADT7316_DEVICE_REV, &rev);
    if (ret)
        return -EIO;

    return sprintf(buf, "%d\n", rev);
}

static IIO_DEVICE_ATTR(device_rev, S_IRUGO, adt7316_show_device_rev, NULL, 0);

static ssize_t adt7316_show_bus_type(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 stat;
    int ret;

    ret = chip->bus.read(chip->bus.client, ADT7316_SPI_LOCK_STAT, &stat);
    if (ret)
        return -EIO;

    if (stat)
        return sprintf(buf, "spi\n");
    else
        return sprintf(buf, "i2c\n");
}

static IIO_DEVICE_ATTR(bus_type, S_IRUGO, adt7316_show_bus_type, NULL, 0);

static struct attribute *adt7316_attributes[] = {
    &iio_dev_attr_all_modes.dev_attr.attr,
    &iio_dev_attr_mode.dev_attr.attr,
    &iio_dev_attr_reset.dev_attr.attr,
    &iio_dev_attr_enabled.dev_attr.attr,
    &iio_dev_attr_ad_channel.dev_attr.attr,
    &iio_dev_attr_all_ad_channels.dev_attr.attr,
    &iio_dev_attr_disable_averaging.dev_attr.attr,
    &iio_dev_attr_enable_smbus_timeout.dev_attr.attr,
    &iio_dev_attr_powerdown.dev_attr.attr,
    &iio_dev_attr_fast_ad_clock.dev_attr.attr,
    &iio_dev_attr_da_high_resolution.dev_attr.attr,
    &iio_dev_attr_enable_proportion_DACA.dev_attr.attr,
    &iio_dev_attr_enable_proportion_DACB.dev_attr.attr,
    &iio_dev_attr_DAC_2Vref_channels_mask.dev_attr.attr,
    &iio_dev_attr_DAC_update_mode.dev_attr.attr,
    &iio_dev_attr_all_DAC_update_modes.dev_attr.attr,
    &iio_dev_attr_update_DAC.dev_attr.attr,
    &iio_dev_attr_DA_AB_Vref_bypass.dev_attr.attr,
    &iio_dev_attr_DA_CD_Vref_bypass.dev_attr.attr,
    &iio_dev_attr_DAC_internal_Vref.dev_attr.attr,
    &iio_dev_attr_VDD.dev_attr.attr,
    &iio_dev_attr_in_temp.dev_attr.attr,
    &iio_dev_attr_ex_temp.dev_attr.attr,
    &iio_dev_attr_in_temp_offset.dev_attr.attr,
    &iio_dev_attr_ex_temp_offset.dev_attr.attr,
    &iio_dev_attr_in_analog_temp_offset.dev_attr.attr,
    &iio_dev_attr_ex_analog_temp_offset.dev_attr.attr,
    &iio_dev_attr_DAC_A.dev_attr.attr,
    &iio_dev_attr_DAC_B.dev_attr.attr,
    &iio_dev_attr_DAC_C.dev_attr.attr,
    &iio_dev_attr_DAC_D.dev_attr.attr,
    &iio_dev_attr_device_id.dev_attr.attr,
    &iio_dev_attr_manufactorer_id.dev_attr.attr,
    &iio_dev_attr_device_rev.dev_attr.attr,
    &iio_dev_attr_bus_type.dev_attr.attr,
    NULL,
};

static const struct attribute_group adt7316_attribute_group = {
    .attrs = adt7316_attributes,
};

static struct attribute *adt7516_attributes[] = {
    &iio_dev_attr_all_modes.dev_attr.attr,
    &iio_dev_attr_mode.dev_attr.attr,
    &iio_dev_attr_select_ex_temp.dev_attr.attr,
    &iio_dev_attr_reset.dev_attr.attr,
    &iio_dev_attr_enabled.dev_attr.attr,
    &iio_dev_attr_ad_channel.dev_attr.attr,
    &iio_dev_attr_all_ad_channels.dev_attr.attr,
    &iio_dev_attr_disable_averaging.dev_attr.attr,
    &iio_dev_attr_enable_smbus_timeout.dev_attr.attr,
    &iio_dev_attr_powerdown.dev_attr.attr,
    &iio_dev_attr_fast_ad_clock.dev_attr.attr,
    &iio_dev_attr_AIN_internal_Vref.dev_attr.attr,
    &iio_dev_attr_da_high_resolution.dev_attr.attr,
    &iio_dev_attr_enable_proportion_DACA.dev_attr.attr,
    &iio_dev_attr_enable_proportion_DACB.dev_attr.attr,
    &iio_dev_attr_DAC_2Vref_channels_mask.dev_attr.attr,
    &iio_dev_attr_DAC_update_mode.dev_attr.attr,
    &iio_dev_attr_all_DAC_update_modes.dev_attr.attr,
    &iio_dev_attr_update_DAC.dev_attr.attr,
    &iio_dev_attr_DA_AB_Vref_bypass.dev_attr.attr,
    &iio_dev_attr_DA_CD_Vref_bypass.dev_attr.attr,
    &iio_dev_attr_DAC_internal_Vref.dev_attr.attr,
    &iio_dev_attr_VDD.dev_attr.attr,
    &iio_dev_attr_in_temp.dev_attr.attr,
    &iio_dev_attr_ex_temp_AIN1.dev_attr.attr,
    &iio_dev_attr_AIN2.dev_attr.attr,
    &iio_dev_attr_AIN3.dev_attr.attr,
    &iio_dev_attr_AIN4.dev_attr.attr,
    &iio_dev_attr_in_temp_offset.dev_attr.attr,
    &iio_dev_attr_ex_temp_offset.dev_attr.attr,
    &iio_dev_attr_in_analog_temp_offset.dev_attr.attr,
    &iio_dev_attr_ex_analog_temp_offset.dev_attr.attr,
    &iio_dev_attr_DAC_A.dev_attr.attr,
    &iio_dev_attr_DAC_B.dev_attr.attr,
    &iio_dev_attr_DAC_C.dev_attr.attr,
    &iio_dev_attr_DAC_D.dev_attr.attr,
    &iio_dev_attr_device_id.dev_attr.attr,
    &iio_dev_attr_manufactorer_id.dev_attr.attr,
    &iio_dev_attr_device_rev.dev_attr.attr,
    &iio_dev_attr_bus_type.dev_attr.attr,
    NULL,
};

static const struct attribute_group adt7516_attribute_group = {
    .attrs = adt7516_attributes,
};

static irqreturn_t adt7316_event_handler(int irq, void *private)
{
    struct iio_dev *indio_dev = private;
    struct adt7316_chip_info *chip = iio_priv(indio_dev);
    u8 stat1, stat2;
    int ret;
    s64 time;

    ret = chip->bus.read(chip->bus.client, ADT7316_INT_STAT1, &stat1);
    if (!ret) {
        if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
            stat1 &= 0x1F;

        time = iio_get_time_ns();
        if (stat1 & (1 << 0))
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_RISING),
                       time);
        if (stat1 & (1 << 1))
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_FALLING),
                       time);
        if (stat1 & (1 << 2))
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 1,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_RISING),
                       time);
        if (stat1 & (1 << 3))
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 1,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_FALLING),
                       time);
        if (stat1 & (1 << 5))
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 1,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_EITHER),
                       time);
        if (stat1 & (1 << 6))
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 2,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_EITHER),
                       time);
        if (stat1 & (1 << 7))
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, 3,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_EITHER),
                       time);
        }
    ret = chip->bus.read(chip->bus.client, ADT7316_INT_STAT2, &stat2);
    if (!ret) {
        if (stat2 & ADT7316_INT_MASK2_VDD)
            iio_push_event(indio_dev,
                       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE,
                                0,
                                IIO_EV_TYPE_THRESH,
                                IIO_EV_DIR_RISING),
                       iio_get_time_ns());
    }

    return IRQ_HANDLED;
}

/*
 * Show mask of enabled interrupts in Hex.
 */
static ssize_t adt7316_show_int_mask(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "0x%x\n", chip->int_mask);
}

/*
 * Set 1 to the mask in Hex to enabled interrupts.
 */
static ssize_t adt7316_set_int_mask(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    unsigned long data;
    int ret;
    u8 mask;

    ret = strict_strtoul(buf, 16, &data);
    if (ret || data >= ADT7316_VDD_INT_MASK + 1)
        return -EINVAL;

    if (data & ADT7316_VDD_INT_MASK)
        mask = 0;           /* enable vdd int */
    else
        mask = ADT7316_INT_MASK2_VDD;   /* disable vdd int */

    ret = chip->bus.write(chip->bus.client, ADT7316_INT_MASK2, mask);
    if (!ret) {
        chip->int_mask &= ~ADT7316_VDD_INT_MASK;
        chip->int_mask |= data & ADT7316_VDD_INT_MASK;
    }

    if (data & ADT7316_TEMP_AIN_INT_MASK) {
        if ((chip->id & ID_FAMILY_MASK) == ID_ADT73XX)
            /* mask in reg is opposite, set 1 to disable */
            mask = (~data) & ADT7316_TEMP_INT_MASK;
        else
            /* mask in reg is opposite, set 1 to disable */
            mask = (~data) & ADT7316_TEMP_AIN_INT_MASK;
    }
    ret = chip->bus.write(chip->bus.client, ADT7316_INT_MASK1, mask);

    chip->int_mask = mask;

    return len;
}
static inline ssize_t adt7316_show_ad_bound(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 val;
    int data;
    int ret;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT73XX &&
        this_attr->address > ADT7316_EX_TEMP_LOW)
        return -EPERM;

    ret = chip->bus.read(chip->bus.client, this_attr->address, &val);
    if (ret)
        return -EIO;

    data = (int)val;

    if (!((chip->id & ID_FAMILY_MASK) == ID_ADT75XX &&
        (chip->config1 & ADT7516_SEL_AIN1_2_EX_TEMP_MASK) == 0)) {
        if (data & 0x80)
            data -= 256;
    }

    return sprintf(buf, "%d\n", data);
}

static inline ssize_t adt7316_set_ad_bound(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    long data;
    u8 val;
    int ret;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT73XX &&
        this_attr->address > ADT7316_EX_TEMP_LOW)
        return -EPERM;

    ret = strict_strtol(buf, 10, &data);
    if (ret)
        return -EINVAL;

    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX &&
        (chip->config1 & ADT7516_SEL_AIN1_2_EX_TEMP_MASK) == 0) {
        if (data > 255 || data < 0)
            return -EINVAL;
    } else {
        if (data > 127 || data < -128)
            return -EINVAL;

        if (data < 0)
            data += 256;
    }

    val = (u8)data;

    ret = chip->bus.write(chip->bus.client, this_attr->address, val);
    if (ret)
        return -EIO;

    return len;
}

static ssize_t adt7316_show_int_enabled(struct device *dev,
        struct device_attribute *attr,
        char *buf)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return sprintf(buf, "%d\n", !!(chip->config1 & ADT7316_INT_EN));
}

static ssize_t adt7316_set_int_enabled(struct device *dev,
        struct device_attribute *attr,
        const char *buf,
        size_t len)
{
    struct iio_dev *dev_info = dev_to_iio_dev(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);
    u8 config1;
    int ret;

    config1 = chip->config1 & (~ADT7316_INT_EN);
    if (!memcmp(buf, "1", 1))
        config1 |= ADT7316_INT_EN;

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
    if (ret)
        return -EIO;

    chip->config1 = config1;

    return len;
}

static IIO_DEVICE_ATTR(int_mask,
               S_IRUGO | S_IWUSR,
               adt7316_show_int_mask, adt7316_set_int_mask,
               0);
static IIO_DEVICE_ATTR(in_temp_high_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7316_IN_TEMP_HIGH);
static IIO_DEVICE_ATTR(in_temp_low_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7316_IN_TEMP_LOW);
static IIO_DEVICE_ATTR(ex_temp_high_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7316_EX_TEMP_HIGH);
static IIO_DEVICE_ATTR(ex_temp_low_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7316_EX_TEMP_LOW);

/* NASTY duplication to be fixed */
static IIO_DEVICE_ATTR(ex_temp_ain1_high_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7316_EX_TEMP_HIGH);
static IIO_DEVICE_ATTR(ex_temp_ain1_low_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7316_EX_TEMP_LOW);
static IIO_DEVICE_ATTR(ain2_high_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7516_AIN2_HIGH);
static IIO_DEVICE_ATTR(ain2_low_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7516_AIN2_LOW);
static IIO_DEVICE_ATTR(ain3_high_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7516_AIN3_HIGH);
static IIO_DEVICE_ATTR(ain3_low_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7516_AIN3_LOW);
static IIO_DEVICE_ATTR(ain4_high_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7516_AIN4_HIGH);
static IIO_DEVICE_ATTR(ain4_low_value,
               S_IRUGO | S_IWUSR,
               adt7316_show_ad_bound, adt7316_set_ad_bound,
               ADT7516_AIN4_LOW);
static IIO_DEVICE_ATTR(int_enabled,
               S_IRUGO | S_IWUSR,
               adt7316_show_int_enabled,
               adt7316_set_int_enabled, 0);

static struct attribute *adt7316_event_attributes[] = {
    &iio_dev_attr_int_mask.dev_attr.attr,
    &iio_dev_attr_in_temp_high_value.dev_attr.attr,
    &iio_dev_attr_in_temp_low_value.dev_attr.attr,
    &iio_dev_attr_ex_temp_high_value.dev_attr.attr,
    &iio_dev_attr_ex_temp_low_value.dev_attr.attr,
    &iio_dev_attr_int_enabled.dev_attr.attr,
    NULL,
};

static struct attribute_group adt7316_event_attribute_group = {
    .attrs = adt7316_event_attributes,
    .name = "events",
};

static struct attribute *adt7516_event_attributes[] = {
    &iio_dev_attr_int_mask.dev_attr.attr,
    &iio_dev_attr_in_temp_high_value.dev_attr.attr,
    &iio_dev_attr_in_temp_low_value.dev_attr.attr,
    &iio_dev_attr_ex_temp_ain1_high_value.dev_attr.attr,
    &iio_dev_attr_ex_temp_ain1_low_value.dev_attr.attr,
    &iio_dev_attr_ain2_high_value.dev_attr.attr,
    &iio_dev_attr_ain2_low_value.dev_attr.attr,
    &iio_dev_attr_ain3_high_value.dev_attr.attr,
    &iio_dev_attr_ain3_low_value.dev_attr.attr,
    &iio_dev_attr_ain4_high_value.dev_attr.attr,
    &iio_dev_attr_ain4_low_value.dev_attr.attr,
    &iio_dev_attr_int_enabled.dev_attr.attr,
    NULL,
};

static struct attribute_group adt7516_event_attribute_group = {
    .attrs = adt7516_event_attributes,
    .name = "events",
};

#ifdef CONFIG_PM_SLEEP
static int adt7316_disable(struct device *dev)
{
    struct iio_dev *dev_info = dev_get_drvdata(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return _adt7316_store_enabled(chip, 0);
}

static int adt7316_enable(struct device *dev)
{
    struct iio_dev *dev_info = dev_get_drvdata(dev);
    struct adt7316_chip_info *chip = iio_priv(dev_info);

    return _adt7316_store_enabled(chip, 1);
}

SIMPLE_DEV_PM_OPS(adt7316_pm_ops, adt7316_disable, adt7316_enable);
EXPORT_SYMBOL_GPL(adt7316_pm_ops);
#endif

static const struct iio_info adt7316_info = {
    .attrs = &adt7316_attribute_group,
    .event_attrs = &adt7316_event_attribute_group,
    .driver_module = THIS_MODULE,
};

static const struct iio_info adt7516_info = {
    .attrs = &adt7516_attribute_group,
    .event_attrs = &adt7516_event_attribute_group,
    .driver_module = THIS_MODULE,
};

/*
 * device probe and remove
 */
int __devinit adt7316_probe(struct device *dev, struct adt7316_bus *bus,
        const char *name)
{
    struct adt7316_chip_info *chip;
    struct iio_dev *indio_dev;
    unsigned short *adt7316_platform_data = dev->platform_data;
    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->bus = *bus;

    if (name[4] == '3')
        chip->id = ID_ADT7316 + (name[6] - '6');
    else if (name[4] == '5')
        chip->id = ID_ADT7516 + (name[6] - '6');
    else
        return -ENODEV;

    chip->ldac_pin = adt7316_platform_data[1];
    if (chip->ldac_pin) {
        chip->config3 |= ADT7316_DA_EN_VIA_DAC_LDCA;
        if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
            chip->config1 |= ADT7516_SEL_AIN3;
    }
    chip->int_mask = ADT7316_TEMP_INT_MASK | ADT7316_VDD_INT_MASK;
    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        chip->int_mask |= ADT7516_AIN_INT_MASK;

    indio_dev->dev.parent = dev;
    if ((chip->id & ID_FAMILY_MASK) == ID_ADT75XX)
        indio_dev->info = &adt7516_info;
    else
        indio_dev->info = &adt7316_info;
    indio_dev->name = name;
    indio_dev->modes = INDIO_DIRECT_MODE;

    if (chip->bus.irq > 0) {
        if (adt7316_platform_data[0])
            chip->bus.irq_flags = adt7316_platform_data[0];

        ret = request_threaded_irq(chip->bus.irq,
                       NULL,
                       &adt7316_event_handler,
                       chip->bus.irq_flags | IRQF_ONESHOT,
                       indio_dev->name,
                       indio_dev);
        if (ret)
            goto error_free_dev;

        if (chip->bus.irq_flags & IRQF_TRIGGER_HIGH)
            chip->config1 |= ADT7316_INT_POLARITY;
    }

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, chip->config1);
    if (ret) {
        ret = -EIO;
        goto error_unreg_irq;
    }

    ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, chip->config3);
    if (ret) {
        ret = -EIO;
        goto error_unreg_irq;
    }

    ret = iio_device_register(indio_dev);
    if (ret)
        goto error_unreg_irq;

    dev_info(dev, "%s temperature sensor, ADC and DAC registered.\n",
            indio_dev->name);

    return 0;

error_unreg_irq:
    free_irq(chip->bus.irq, indio_dev);
error_free_dev:
    iio_device_free(indio_dev);
error_ret:
    return ret;
}
EXPORT_SYMBOL(adt7316_probe);

int __devexit adt7316_remove(struct device *dev)
{
    struct iio_dev *indio_dev = dev_get_drvdata(dev);
    struct adt7316_chip_info *chip = iio_priv(indio_dev);

    iio_device_unregister(indio_dev);
    if (chip->bus.irq)
        free_irq(chip->bus.irq, indio_dev);
    iio_device_free(indio_dev);

    return 0;
}
EXPORT_SYMBOL(adt7316_remove);

MODULE_AUTHOR("Sonic Zhang <[email protected]>");
MODULE_DESCRIPTION("Analog Devices ADT7316/7/8 and ADT7516/7/9 digital"
            " temperature sensor, ADC and DAC driver");
MODULE_LICENSE("GPL v2");