1103 lines
25 KiB
C
1103 lines
25 KiB
C
/*
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* ADT7410 digital temperature sensor driver supporting ADT7310/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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#include <linux/spi/spi.h>
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#include <linux/module.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/events.h>
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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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* ADT7310 registers definition
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*/
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#define ADT7310_STATUS 0
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#define ADT7310_CONFIG 1
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#define ADT7310_TEMPERATURE 2
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#define ADT7310_ID 3
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#define ADT7310_T_CRIT 4
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#define ADT7310_T_HYST 5
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#define ADT7310_T_ALARM_HIGH 6
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#define ADT7310_T_ALARM_LOW 7
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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 ADT7310_CMD_REG_MASK 0x28
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#define ADT7310_CMD_REG_OFFSET 3
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#define ADT7310_CMD_READ 0x40
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#define ADT7310_CMD_CON_READ 0x4
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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 adt7410_ops {
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int (*read_word)(struct adt7410_chip_info *, u8 reg, u16 *data);
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int (*write_word)(struct adt7410_chip_info *, u8 reg, u16 data);
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int (*read_byte)(struct adt7410_chip_info *, u8 reg, u8 *data);
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int (*write_byte)(struct adt7410_chip_info *, u8 reg, u8 data);
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};
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struct adt7410_chip_info {
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struct device *dev;
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u8 config;
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const struct adt7410_ops *ops;
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};
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static int adt7410_read_word(struct adt7410_chip_info *chip, u8 reg, u16 *data)
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{
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return chip->ops->read_word(chip, reg, data);
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}
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static int adt7410_write_word(struct adt7410_chip_info *chip, u8 reg, u16 data)
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{
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return chip->ops->write_word(chip, reg, data);
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}
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static int adt7410_read_byte(struct adt7410_chip_info *chip, u8 reg, u8 *data)
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{
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return chip->ops->read_byte(chip, reg, data);
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}
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static int adt7410_write_byte(struct adt7410_chip_info *chip, u8 reg, u8 data)
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{
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return chip->ops->write_byte(chip, reg, data);
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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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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u16 config;
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int ret;
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ret = adt7410_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_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 len;
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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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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int ret;
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int bits;
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ret = adt7410_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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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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_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_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 len;
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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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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u8 id;
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int ret;
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ret = adt7410_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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data &= ~0x7;
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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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}
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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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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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_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_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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static irqreturn_t adt7410_event_handler(int irq, void *private)
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{
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struct iio_dev *indio_dev = private;
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struct adt7410_chip_info *chip = iio_priv(indio_dev);
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s64 timestamp = iio_get_time_ns();
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u8 status;
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if (adt7410_read_byte(chip, ADT7410_STATUS, &status))
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return IRQ_HANDLED;
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if (status & ADT7410_STAT_T_HIGH)
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iio_push_event(indio_dev,
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IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
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IIO_EV_TYPE_THRESH,
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IIO_EV_DIR_RISING),
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timestamp);
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if (status & ADT7410_STAT_T_LOW)
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iio_push_event(indio_dev,
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IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
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IIO_EV_TYPE_THRESH,
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IIO_EV_DIR_FALLING),
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timestamp);
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if (status & ADT7410_STAT_T_CRIT)
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iio_push_event(indio_dev,
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IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
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IIO_EV_TYPE_THRESH,
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IIO_EV_DIR_RISING),
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timestamp);
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return IRQ_HANDLED;
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}
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static ssize_t adt7410_show_event_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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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int ret;
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ret = adt7410_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_EVENT_MODE)
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return sprintf(buf, "interrupt\n");
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else
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return sprintf(buf, "comparator\n");
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}
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static ssize_t adt7410_set_event_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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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u16 config;
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int ret;
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ret = adt7410_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_EVENT_MODE;
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if (strcmp(buf, "comparator") != 0)
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config |= ADT7410_EVENT_MODE;
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ret = adt7410_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 ssize_t adt7410_show_available_event_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, "comparator\ninterrupt\n");
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}
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static ssize_t adt7410_show_fault_queue(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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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int ret;
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ret = adt7410_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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return sprintf(buf, "%d\n", chip->config & ADT7410_FAULT_QUEUE_MASK);
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}
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static ssize_t adt7410_set_fault_queue(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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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unsigned long data;
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int ret;
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u8 config;
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ret = strict_strtoul(buf, 10, &data);
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if (ret || data > 3)
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return -EINVAL;
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ret = adt7410_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_FAULT_QUEUE_MASK;
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config |= data;
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ret = adt7410_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 inline ssize_t adt7410_show_t_bound(struct device *dev,
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struct device_attribute *attr,
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u8 bound_reg,
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char *buf)
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{
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struct iio_dev *dev_info = dev_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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u16 data;
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int ret;
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ret = adt7410_read_word(chip, bound_reg, &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 inline ssize_t adt7410_set_t_bound(struct device *dev,
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struct device_attribute *attr,
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u8 bound_reg,
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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_to_iio_dev(dev);
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struct adt7410_chip_info *chip = iio_priv(dev_info);
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long tmp1, tmp2;
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u16 data;
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char *pos;
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int ret;
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pos = strchr(buf, '.');
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ret = strict_strtol(buf, 10, &tmp1);
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if (ret || tmp1 > 127 || tmp1 < -128)
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return -EINVAL;
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|
|
if (pos) {
|
|
len = strlen(pos);
|
|
|
|
if (chip->config & ADT7410_RESOLUTION) {
|
|
if (len > ADT7410_T16_VALUE_FLOAT_OFFSET)
|
|
len = ADT7410_T16_VALUE_FLOAT_OFFSET;
|
|
pos[len] = 0;
|
|
ret = strict_strtol(pos, 10, &tmp2);
|
|
|
|
if (!ret)
|
|
tmp2 = (tmp2 / 78125) * 78125;
|
|
} else {
|
|
if (len > ADT7410_T13_VALUE_FLOAT_OFFSET)
|
|
len = ADT7410_T13_VALUE_FLOAT_OFFSET;
|
|
pos[len] = 0;
|
|
ret = strict_strtol(pos, 10, &tmp2);
|
|
|
|
if (!ret)
|
|
tmp2 = (tmp2 / 625) * 625;
|
|
}
|
|
}
|
|
|
|
if (tmp1 < 0)
|
|
data = (u16)(-tmp1);
|
|
else
|
|
data = (u16)tmp1;
|
|
|
|
if (chip->config & ADT7410_RESOLUTION) {
|
|
data = (data << ADT7410_T16_VALUE_FLOAT_OFFSET) |
|
|
(tmp2 & ADT7410_T16_VALUE_FLOAT_MASK);
|
|
|
|
if (tmp1 < 0)
|
|
/* convert positive value to supplyment */
|
|
data = (u16)((ADT7410_T16_VALUE_SIGN << 1) - (u32)data);
|
|
} else {
|
|
data = (data << ADT7410_T13_VALUE_FLOAT_OFFSET) |
|
|
(tmp2 & ADT7410_T13_VALUE_FLOAT_MASK);
|
|
|
|
if (tmp1 < 0)
|
|
/* convert positive value to supplyment */
|
|
data = (ADT7410_T13_VALUE_SIGN << 1) - data;
|
|
data <<= ADT7410_T13_VALUE_OFFSET;
|
|
}
|
|
|
|
ret = adt7410_write_word(chip, bound_reg, data);
|
|
if (ret)
|
|
return -EIO;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t adt7410_show_t_alarm_high(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return adt7410_show_t_bound(dev, attr,
|
|
ADT7410_T_ALARM_HIGH, buf);
|
|
}
|
|
|
|
static inline ssize_t adt7410_set_t_alarm_high(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t len)
|
|
{
|
|
return adt7410_set_t_bound(dev, attr,
|
|
ADT7410_T_ALARM_HIGH, buf, len);
|
|
}
|
|
|
|
static ssize_t adt7410_show_t_alarm_low(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return adt7410_show_t_bound(dev, attr,
|
|
ADT7410_T_ALARM_LOW, buf);
|
|
}
|
|
|
|
static inline ssize_t adt7410_set_t_alarm_low(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t len)
|
|
{
|
|
return adt7410_set_t_bound(dev, attr,
|
|
ADT7410_T_ALARM_LOW, buf, len);
|
|
}
|
|
|
|
static ssize_t adt7410_show_t_crit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return adt7410_show_t_bound(dev, attr,
|
|
ADT7410_T_CRIT, buf);
|
|
}
|
|
|
|
static inline ssize_t adt7410_set_t_crit(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t len)
|
|
{
|
|
return adt7410_set_t_bound(dev, attr,
|
|
ADT7410_T_CRIT, buf, len);
|
|
}
|
|
|
|
static ssize_t adt7410_show_t_hyst(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct iio_dev *dev_info = dev_to_iio_dev(dev);
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
|
int ret;
|
|
u8 t_hyst;
|
|
|
|
ret = adt7410_read_byte(chip, ADT7410_T_HYST, &t_hyst);
|
|
if (ret)
|
|
return -EIO;
|
|
|
|
return sprintf(buf, "%d\n", t_hyst & ADT7410_T_HYST_MASK);
|
|
}
|
|
|
|
static inline ssize_t adt7410_set_t_hyst(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t len)
|
|
{
|
|
struct iio_dev *dev_info = dev_to_iio_dev(dev);
|
|
struct adt7410_chip_info *chip = iio_priv(dev_info);
|
|
int ret;
|
|
unsigned long data;
|
|
u8 t_hyst;
|
|
|
|
ret = strict_strtol(buf, 10, &data);
|
|
|
|
if (ret || data > ADT7410_T_HYST_MASK)
|
|
return -EINVAL;
|
|
|
|
t_hyst = (u8)data;
|
|
|
|
ret = adt7410_write_byte(chip, ADT7410_T_HYST, t_hyst);
|
|
if (ret)
|
|
return -EIO;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static IIO_DEVICE_ATTR(event_mode,
|
|
S_IRUGO | S_IWUSR,
|
|
adt7410_show_event_mode, adt7410_set_event_mode, 0);
|
|
static IIO_DEVICE_ATTR(available_event_modes,
|
|
S_IRUGO,
|
|
adt7410_show_available_event_modes, NULL, 0);
|
|
static IIO_DEVICE_ATTR(fault_queue,
|
|
S_IRUGO | S_IWUSR,
|
|
adt7410_show_fault_queue, adt7410_set_fault_queue, 0);
|
|
static IIO_DEVICE_ATTR(t_alarm_high,
|
|
S_IRUGO | S_IWUSR,
|
|
adt7410_show_t_alarm_high, adt7410_set_t_alarm_high, 0);
|
|
static IIO_DEVICE_ATTR(t_alarm_low,
|
|
S_IRUGO | S_IWUSR,
|
|
adt7410_show_t_alarm_low, adt7410_set_t_alarm_low, 0);
|
|
static IIO_DEVICE_ATTR(t_crit,
|
|
S_IRUGO | S_IWUSR,
|
|
adt7410_show_t_crit, adt7410_set_t_crit, 0);
|
|
static IIO_DEVICE_ATTR(t_hyst,
|
|
S_IRUGO | S_IWUSR,
|
|
adt7410_show_t_hyst, adt7410_set_t_hyst, 0);
|
|
|
|
static struct attribute *adt7410_event_int_attributes[] = {
|
|
&iio_dev_attr_event_mode.dev_attr.attr,
|
|
&iio_dev_attr_available_event_modes.dev_attr.attr,
|
|
&iio_dev_attr_fault_queue.dev_attr.attr,
|
|
&iio_dev_attr_t_alarm_high.dev_attr.attr,
|
|
&iio_dev_attr_t_alarm_low.dev_attr.attr,
|
|
&iio_dev_attr_t_crit.dev_attr.attr,
|
|
&iio_dev_attr_t_hyst.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group adt7410_event_attribute_group = {
|
|
.attrs = adt7410_event_int_attributes,
|
|
.name = "events",
|
|
};
|
|
|
|
static const struct iio_info adt7410_info = {
|
|
.attrs = &adt7410_attribute_group,
|
|
.event_attrs = &adt7410_event_attribute_group,
|
|
.driver_module = THIS_MODULE,
|
|
};
|
|
|
|
/*
|
|
* device probe and remove
|
|
*/
|
|
|
|
static int adt7410_probe(struct device *dev, int irq,
|
|
const char *name, const struct adt7410_ops *ops)
|
|
{
|
|
unsigned long *adt7410_platform_data = dev->platform_data;
|
|
unsigned long local_pdata[] = {0, 0};
|
|
struct adt7410_chip_info *chip;
|
|
struct iio_dev *indio_dev;
|
|
int ret = 0;
|
|
|
|
indio_dev = iio_device_alloc(sizeof(*chip));
|
|
if (indio_dev == NULL) {
|
|
ret = -ENOMEM;
|
|
goto error_ret;
|
|
}
|
|
chip = iio_priv(indio_dev);
|
|
/* this is only used for device removal purposes */
|
|
dev_set_drvdata(dev, indio_dev);
|
|
|
|
chip->dev = dev;
|
|
chip->ops = ops;
|
|
|
|
indio_dev->name = name;
|
|
indio_dev->dev.parent = dev;
|
|
indio_dev->info = &adt7410_info;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
if (!adt7410_platform_data)
|
|
adt7410_platform_data = local_pdata;
|
|
|
|
/* CT critcal temperature event. line 0 */
|
|
if (irq) {
|
|
ret = request_threaded_irq(irq,
|
|
NULL,
|
|
&adt7410_event_handler,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
name,
|
|
indio_dev);
|
|
if (ret)
|
|
goto error_free_dev;
|
|
}
|
|
|
|
/* INT bound temperature alarm event. line 1 */
|
|
if (adt7410_platform_data[0]) {
|
|
ret = request_threaded_irq(adt7410_platform_data[0],
|
|
NULL,
|
|
&adt7410_event_handler,
|
|
adt7410_platform_data[1] |
|
|
IRQF_ONESHOT,
|
|
name,
|
|
indio_dev);
|
|
if (ret)
|
|
goto error_unreg_ct_irq;
|
|
}
|
|
|
|
ret = adt7410_read_byte(chip, ADT7410_CONFIG, &chip->config);
|
|
if (ret) {
|
|
ret = -EIO;
|
|
goto error_unreg_int_irq;
|
|
}
|
|
|
|
chip->config |= ADT7410_RESOLUTION;
|
|
|
|
if (irq && adt7410_platform_data[0]) {
|
|
|
|
/* set irq polarity low level */
|
|
chip->config &= ~ADT7410_CT_POLARITY;
|
|
|
|
if (adt7410_platform_data[1] & IRQF_TRIGGER_HIGH)
|
|
chip->config |= ADT7410_INT_POLARITY;
|
|
else
|
|
chip->config &= ~ADT7410_INT_POLARITY;
|
|
}
|
|
|
|
ret = adt7410_write_byte(chip, ADT7410_CONFIG, chip->config);
|
|
if (ret) {
|
|
ret = -EIO;
|
|
goto error_unreg_int_irq;
|
|
}
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret)
|
|
goto error_unreg_int_irq;
|
|
|
|
dev_info(dev, "%s temperature sensor registered.\n",
|
|
name);
|
|
|
|
return 0;
|
|
|
|
error_unreg_int_irq:
|
|
free_irq(adt7410_platform_data[0], indio_dev);
|
|
error_unreg_ct_irq:
|
|
free_irq(irq, indio_dev);
|
|
error_free_dev:
|
|
iio_device_free(indio_dev);
|
|
error_ret:
|
|
return ret;
|
|
}
|
|
|
|
static int adt7410_remove(struct device *dev, int irq)
|
|
{
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
unsigned long *adt7410_platform_data = dev->platform_data;
|
|
|
|
iio_device_unregister(indio_dev);
|
|
if (adt7410_platform_data[0])
|
|
free_irq(adt7410_platform_data[0], indio_dev);
|
|
if (irq)
|
|
free_irq(irq, indio_dev);
|
|
iio_device_free(indio_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_I2C)
|
|
|
|
static int adt7410_i2c_read_word(struct adt7410_chip_info *chip, u8 reg,
|
|
u16 *data)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(chip->dev);
|
|
int ret = 0;
|
|
|
|
ret = i2c_smbus_read_word_data(client, reg);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "I2C read error\n");
|
|
return ret;
|
|
}
|
|
|
|
*data = swab16((u16)ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adt7410_i2c_write_word(struct adt7410_chip_info *chip, u8 reg,
|
|
u16 data)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(chip->dev);
|
|
int ret = 0;
|
|
|
|
ret = i2c_smbus_write_word_data(client, reg, swab16(data));
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "I2C write error\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int adt7410_i2c_read_byte(struct adt7410_chip_info *chip, u8 reg,
|
|
u8 *data)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(chip->dev);
|
|
int ret = 0;
|
|
|
|
ret = i2c_smbus_read_byte_data(client, reg);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "I2C read error\n");
|
|
return ret;
|
|
}
|
|
|
|
*data = (u8)ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adt7410_i2c_write_byte(struct adt7410_chip_info *chip, u8 reg,
|
|
u8 data)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(chip->dev);
|
|
int ret = 0;
|
|
|
|
ret = i2c_smbus_write_byte_data(client, reg, data);
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "I2C write error\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct adt7410_ops adt7410_i2c_ops = {
|
|
.read_word = adt7410_i2c_read_word,
|
|
.write_word = adt7410_i2c_write_word,
|
|
.read_byte = adt7410_i2c_read_byte,
|
|
.write_byte = adt7410_i2c_write_byte,
|
|
};
|
|
|
|
static int adt7410_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
return adt7410_probe(&client->dev, client->irq, id->name,
|
|
&adt7410_i2c_ops);
|
|
}
|
|
|
|
static int adt7410_i2c_remove(struct i2c_client *client)
|
|
{
|
|
return adt7410_remove(&client->dev, client->irq);
|
|
}
|
|
|
|
static const struct i2c_device_id adt7410_id[] = {
|
|
{ "adt7410", 0 },
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, adt7410_id);
|
|
|
|
static struct i2c_driver adt7410_driver = {
|
|
.driver = {
|
|
.name = "adt7410",
|
|
},
|
|
.probe = adt7410_i2c_probe,
|
|
.remove = adt7410_i2c_remove,
|
|
.id_table = adt7410_id,
|
|
};
|
|
|
|
static int __init adt7410_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&adt7410_driver);
|
|
}
|
|
|
|
static void __exit adt7410_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&adt7410_driver);
|
|
}
|
|
|
|
#else
|
|
|
|
static int __init adt7410_i2c_init(void) { return 0; };
|
|
static void __exit adt7410_i2c_exit(void) {};
|
|
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_SPI_MASTER)
|
|
|
|
static const u8 adt7371_reg_table[] = {
|
|
[ADT7410_TEMPERATURE] = ADT7310_TEMPERATURE,
|
|
[ADT7410_STATUS] = ADT7310_STATUS,
|
|
[ADT7410_CONFIG] = ADT7310_CONFIG,
|
|
[ADT7410_T_ALARM_HIGH] = ADT7310_T_ALARM_HIGH,
|
|
[ADT7410_T_ALARM_LOW] = ADT7310_T_ALARM_LOW,
|
|
[ADT7410_T_CRIT] = ADT7310_T_CRIT,
|
|
[ADT7410_T_HYST] = ADT7310_T_HYST,
|
|
[ADT7410_ID] = ADT7310_ID,
|
|
};
|
|
|
|
#define AD7310_COMMAND(reg) (adt7371_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET)
|
|
|
|
static int adt7310_spi_read_word(struct adt7410_chip_info *chip,
|
|
u8 reg, u16 *data)
|
|
{
|
|
struct spi_device *spi = to_spi_device(chip->dev);
|
|
u8 command = AD7310_COMMAND(reg);
|
|
int ret = 0;
|
|
|
|
command |= ADT7310_CMD_READ;
|
|
ret = spi_write(spi, &command, sizeof(command));
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "SPI write command error\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = spi_read(spi, (u8 *)data, sizeof(*data));
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "SPI read word error\n");
|
|
return ret;
|
|
}
|
|
|
|
*data = be16_to_cpu(*data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adt7310_spi_write_word(struct adt7410_chip_info *chip, u8 reg,
|
|
u16 data)
|
|
{
|
|
struct spi_device *spi = to_spi_device(chip->dev);
|
|
u8 buf[3];
|
|
int ret = 0;
|
|
|
|
buf[0] = AD7310_COMMAND(reg);
|
|
buf[1] = (u8)(data >> 8);
|
|
buf[2] = (u8)(data & 0xFF);
|
|
|
|
ret = spi_write(spi, buf, 3);
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "SPI write word error\n");
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int adt7310_spi_read_byte(struct adt7410_chip_info *chip, u8 reg,
|
|
u8 *data)
|
|
{
|
|
struct spi_device *spi = to_spi_device(chip->dev);
|
|
u8 command = AD7310_COMMAND(reg);
|
|
int ret = 0;
|
|
|
|
command |= ADT7310_CMD_READ;
|
|
ret = spi_write(spi, &command, sizeof(command));
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "SPI write command error\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = spi_read(spi, data, sizeof(*data));
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "SPI read byte error\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adt7310_spi_write_byte(struct adt7410_chip_info *chip, u8 reg,
|
|
u8 data)
|
|
{
|
|
struct spi_device *spi = to_spi_device(chip->dev);
|
|
u8 buf[2];
|
|
int ret = 0;
|
|
|
|
buf[0] = AD7310_COMMAND(reg);
|
|
buf[1] = data;
|
|
|
|
ret = spi_write(spi, buf, 2);
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "SPI write byte error\n");
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct adt7410_ops adt7310_spi_ops = {
|
|
.read_word = adt7310_spi_read_word,
|
|
.write_word = adt7310_spi_write_word,
|
|
.read_byte = adt7310_spi_read_byte,
|
|
.write_byte = adt7310_spi_write_byte,
|
|
};
|
|
|
|
static int adt7310_spi_probe(struct spi_device *spi)
|
|
{
|
|
return adt7410_probe(&spi->dev, spi->irq,
|
|
spi_get_device_id(spi)->name, &adt7310_spi_ops);
|
|
}
|
|
|
|
static int adt7310_spi_remove(struct spi_device *spi)
|
|
{
|
|
return adt7410_remove(&spi->dev, spi->irq);
|
|
}
|
|
|
|
static const struct spi_device_id adt7310_id[] = {
|
|
{ "adt7310", 0 },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, adt7310_id);
|
|
|
|
static struct spi_driver adt7310_driver = {
|
|
.driver = {
|
|
.name = "adt7310",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = adt7310_spi_probe,
|
|
.remove = adt7310_spi_remove,
|
|
.id_table = adt7310_id,
|
|
};
|
|
|
|
static int __init adt7310_spi_init(void)
|
|
{
|
|
return spi_register_driver(&adt7310_driver);
|
|
}
|
|
|
|
static void adt7310_spi_exit(void)
|
|
{
|
|
spi_unregister_driver(&adt7310_driver);
|
|
}
|
|
|
|
#else
|
|
|
|
static int __init adt7310_spi_init(void) { return 0; };
|
|
static void adt7310_spi_exit(void) {};
|
|
|
|
#endif
|
|
|
|
static int __init adt7410_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = adt7310_spi_init();
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = adt7410_i2c_init();
|
|
if (ret)
|
|
adt7310_spi_exit();
|
|
|
|
return ret;
|
|
}
|
|
module_init(adt7410_init);
|
|
|
|
static void __exit adt7410_exit(void)
|
|
{
|
|
adt7410_i2c_exit();
|
|
adt7310_spi_exit();
|
|
}
|
|
module_exit(adt7410_exit);
|
|
|
|
MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
|
|
MODULE_DESCRIPTION("Analog Devices ADT7310/ADT7410 digital temperature sensor driver");
|
|
MODULE_LICENSE("GPL v2");
|