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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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staging: iio: adc: new driver for ADT7410 temperature sensors
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
parent
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06b86a75b1
3 changed files with 923 additions and 0 deletions
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@ -127,3 +127,10 @@ config ADT7310
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help
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Say yes here to build support for Analog Devices ADT7310
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temperature sensors.
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config ADT7410
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tristate "Analog Devices ADT7410 temperature sensor driver"
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depends on I2C
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help
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Say yes here to build support for Analog Devices ADT7410
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temperature sensors.
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@ -24,3 +24,4 @@ obj-$(CONFIG_AD7745) += ad7745.o
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obj-$(CONFIG_AD7816) += ad7816.o
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obj-$(CONFIG_ADT75) += adt75.o
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obj-$(CONFIG_ADT7310) += adt7310.o
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obj-$(CONFIG_ADT7410) += adt7410.o
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915
drivers/staging/iio/adc/adt7410.c
Normal file
915
drivers/staging/iio/adc/adt7410.c
Normal file
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@ -0,0 +1,915 @@
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/*
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* ADT7410 digital temperature sensor driver supporting ADT7410
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*
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* Copyright 2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <linux/workqueue.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/rtc.h>
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#include "../iio.h"
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#include "../sysfs.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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* ADT7410 status
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*/
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#define ADT7410_STAT_T_LOW 0x10
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#define ADT7410_STAT_T_HIGH 0x20
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#define ADT7410_STAT_T_CRIT 0x40
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#define ADT7410_STAT_NOT_RDY 0x80
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/*
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* ADT7410 config
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*/
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#define ADT7410_FAULT_QUEUE_MASK 0x3
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#define ADT7410_CT_POLARITY 0x4
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#define ADT7410_INT_POLARITY 0x8
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#define ADT7410_EVENT_MODE 0x10
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#define ADT7410_MODE_MASK 0x60
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#define ADT7410_ONESHOT 0x20
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#define ADT7410_SPS 0x40
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#define ADT7410_PD 0x60
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#define ADT7410_RESOLUTION 0x80
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/*
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* ADT7410 masks
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*/
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#define ADT7410_T16_VALUE_SIGN 0x8000
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#define ADT7410_T16_VALUE_FLOAT_OFFSET 7
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#define ADT7410_T16_VALUE_FLOAT_MASK 0x7F
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#define ADT7410_T13_VALUE_SIGN 0x1000
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#define ADT7410_T13_VALUE_OFFSET 3
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#define ADT7410_T13_VALUE_FLOAT_OFFSET 4
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#define ADT7410_T13_VALUE_FLOAT_MASK 0xF
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#define ADT7410_T_HYST_MASK 0xF
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#define ADT7410_DEVICE_ID_MASK 0xF
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#define ADT7410_MANUFACTORY_ID_MASK 0xF0
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#define ADT7410_MANUFACTORY_ID_OFFSET 4
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#define ADT7410_IRQS 2
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/*
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* struct adt7410_chip_info - chip specifc information
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*/
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struct adt7410_chip_info {
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const char *name;
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struct i2c_client *client;
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struct iio_dev *indio_dev;
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struct work_struct thresh_work;
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s64 last_timestamp;
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u8 config;
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};
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/*
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* adt7410 register access by I2C
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*/
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static int adt7410_i2c_read_word(struct adt7410_chip_info *chip, u8 reg, u16 *data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_read_word_data(client, reg);
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if (ret < 0) {
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dev_err(&client->dev, "I2C read error\n");
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return ret;
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}
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*data = swab16((u16)ret);
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return 0;
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}
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static int adt7410_i2c_write_word(struct adt7410_chip_info *chip, u8 reg, u16 data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_write_word_data(client, reg, swab16(data));
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if (ret < 0)
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dev_err(&client->dev, "I2C write error\n");
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return ret;
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}
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static int adt7410_i2c_read_byte(struct adt7410_chip_info *chip, u8 reg, u8 *data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0) {
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dev_err(&client->dev, "I2C read error\n");
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return ret;
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}
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*data = (u8)ret;
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return 0;
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}
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static int adt7410_i2c_write_byte(struct adt7410_chip_info *chip, u8 reg, u8 data)
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{
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret = i2c_smbus_write_byte_data(client, reg, data);
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if (ret < 0)
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dev_err(&client->dev, "I2C write error\n");
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return ret;
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}
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static ssize_t adt7410_show_mode(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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u8 config;
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config = chip->config & ADT7410_MODE_MASK;
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switch (config) {
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case ADT7410_PD:
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return sprintf(buf, "power-down\n");
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case ADT7410_ONESHOT:
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return sprintf(buf, "one-shot\n");
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case ADT7410_SPS:
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return sprintf(buf, "sps\n");
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default:
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return sprintf(buf, "full\n");
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}
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}
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static ssize_t adt7410_store_mode(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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u16 config;
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int ret;
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ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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config = chip->config & (~ADT7410_MODE_MASK);
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if (strcmp(buf, "power-down"))
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config |= ADT7410_PD;
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else if (strcmp(buf, "one-shot"))
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config |= ADT7410_ONESHOT;
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else if (strcmp(buf, "sps"))
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config |= ADT7410_SPS;
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ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config);
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if (ret)
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return -EIO;
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chip->config = config;
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return ret;
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}
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static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
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adt7410_show_mode,
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adt7410_store_mode,
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0);
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static ssize_t adt7410_show_available_modes(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "full\none-shot\nsps\npower-down\n");
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}
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static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt7410_show_available_modes, NULL, 0);
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static ssize_t adt7410_show_resolution(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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int ret;
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int bits;
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ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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if (chip->config & ADT7410_RESOLUTION)
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bits = 16;
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else
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bits = 13;
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return sprintf(buf, "%d bits\n", bits);
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}
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static ssize_t adt7410_store_resolution(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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unsigned long data;
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u16 config;
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int ret;
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ret = strict_strtoul(buf, 10, &data);
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if (ret)
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return -EINVAL;
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ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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config = chip->config & (~ADT7410_RESOLUTION);
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if (data)
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config |= ADT7410_RESOLUTION;
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ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config);
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if (ret)
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return -EIO;
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chip->config = config;
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return ret;
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}
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static IIO_DEVICE_ATTR(resolution, S_IRUGO | S_IWUSR,
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adt7410_show_resolution,
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adt7410_store_resolution,
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0);
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static ssize_t adt7410_show_id(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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u8 id;
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int ret;
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ret = adt7410_i2c_read_byte(chip, ADT7410_ID, &id);
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if (ret)
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return -EIO;
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return sprintf(buf, "device id: 0x%x\nmanufactory id: 0x%x\n",
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id & ADT7410_DEVICE_ID_MASK,
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(id & ADT7410_MANUFACTORY_ID_MASK) >> ADT7410_MANUFACTORY_ID_OFFSET);
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}
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static IIO_DEVICE_ATTR(id, S_IRUGO | S_IWUSR,
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adt7410_show_id,
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NULL,
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0);
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static ssize_t adt7410_convert_temperature(struct adt7410_chip_info *chip,
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u16 data, char *buf)
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{
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char sign = ' ';
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if (chip->config & ADT7410_RESOLUTION) {
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if (data & ADT7410_T16_VALUE_SIGN) {
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/* convert supplement to positive value */
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data = (u16)((ADT7410_T16_VALUE_SIGN << 1) - (u32)data);
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sign = '-';
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}
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return sprintf(buf, "%c%d.%.7d\n", sign,
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(data >> ADT7410_T16_VALUE_FLOAT_OFFSET),
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(data & ADT7410_T16_VALUE_FLOAT_MASK) * 78125);
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} else {
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if (data & ADT7410_T13_VALUE_SIGN) {
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/* convert supplement to positive value */
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data >>= ADT7410_T13_VALUE_OFFSET;
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data = (ADT7410_T13_VALUE_SIGN << 1) - data;
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sign = '-';
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}
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return sprintf(buf, "%c%d.%.4d\n", sign,
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(data >> ADT7410_T13_VALUE_FLOAT_OFFSET),
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(data & ADT7410_T13_VALUE_FLOAT_MASK) * 625);
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}
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}
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static ssize_t adt7410_show_value(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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u8 status;
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u16 data;
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int ret, i = 0;
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do {
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ret = adt7410_i2c_read_byte(chip, ADT7410_STATUS, &status);
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if (ret)
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return -EIO;
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i++;
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if (i == 10000)
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return -EIO;
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} while (status & ADT7410_STAT_NOT_RDY);
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ret = adt7410_i2c_read_word(chip, ADT7410_TEMPERATURE, &data);
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if (ret)
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return -EIO;
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return adt7410_convert_temperature(chip, data, buf);
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}
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static IIO_DEVICE_ATTR(value, S_IRUGO, adt7410_show_value, NULL, 0);
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static ssize_t adt7410_show_name(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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return sprintf(buf, "%s\n", chip->name);
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}
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static IIO_DEVICE_ATTR(name, S_IRUGO, adt7410_show_name, 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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&iio_dev_attr_name.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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/*
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* temperature bound events
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*/
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#define IIO_EVENT_CODE_ADT7410_ABOVE_ALARM IIO_BUFFER_EVENT_CODE(0)
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#define IIO_EVENT_CODE_ADT7410_BELLOW_ALARM IIO_BUFFER_EVENT_CODE(1)
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#define IIO_EVENT_CODE_ADT7410_ABOVE_CRIT IIO_BUFFER_EVENT_CODE(2)
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static void adt7410_interrupt_bh(struct work_struct *work_s)
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{
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struct adt7410_chip_info *chip =
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container_of(work_s, struct adt7410_chip_info, thresh_work);
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u8 status;
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if (adt7410_i2c_read_byte(chip, ADT7410_STATUS, &status))
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return;
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enable_irq(chip->client->irq);
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if (status & ADT7410_STAT_T_HIGH)
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iio_push_event(chip->indio_dev, 0,
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IIO_EVENT_CODE_ADT7410_ABOVE_ALARM,
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chip->last_timestamp);
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if (status & ADT7410_STAT_T_LOW)
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iio_push_event(chip->indio_dev, 0,
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IIO_EVENT_CODE_ADT7410_BELLOW_ALARM,
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chip->last_timestamp);
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if (status & ADT7410_STAT_T_CRIT)
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iio_push_event(chip->indio_dev, 0,
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IIO_EVENT_CODE_ADT7410_ABOVE_CRIT,
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chip->last_timestamp);
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}
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static int adt7410_interrupt(struct iio_dev *dev_info,
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int index,
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s64 timestamp,
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int no_test)
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{
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struct adt7410_chip_info *chip = dev_info->dev_data;
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chip->last_timestamp = timestamp;
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schedule_work(&chip->thresh_work);
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return 0;
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}
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IIO_EVENT_SH(adt7410, &adt7410_interrupt);
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IIO_EVENT_SH(adt7410_ct, &adt7410_interrupt);
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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_get_drvdata(dev);
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struct adt7410_chip_info *chip = dev_info->dev_data;
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int ret;
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ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
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if (ret)
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return -EIO;
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|
||||
if (chip->config & ADT7410_EVENT_MODE)
|
||||
return sprintf(buf, "interrupt\n");
|
||||
else
|
||||
return sprintf(buf, "comparator\n");
|
||||
}
|
||||
|
||||
static ssize_t adt7410_set_event_mode(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev *dev_info = dev_get_drvdata(dev);
|
||||
struct adt7410_chip_info *chip = dev_info->dev_data;
|
||||
u16 config;
|
||||
int ret;
|
||||
|
||||
ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
config = chip->config &= ~ADT7410_EVENT_MODE;
|
||||
if (strcmp(buf, "comparator") != 0)
|
||||
config |= ADT7410_EVENT_MODE;
|
||||
|
||||
ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
chip->config = config;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t adt7410_show_available_event_modes(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return sprintf(buf, "comparator\ninterrupt\n");
|
||||
}
|
||||
|
||||
static ssize_t adt7410_show_fault_queue(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct iio_dev *dev_info = dev_get_drvdata(dev);
|
||||
struct adt7410_chip_info *chip = dev_info->dev_data;
|
||||
int ret;
|
||||
|
||||
ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
return sprintf(buf, "%d\n", chip->config & ADT7410_FAULT_QUEUE_MASK);
|
||||
}
|
||||
|
||||
static ssize_t adt7410_set_fault_queue(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev *dev_info = dev_get_drvdata(dev);
|
||||
struct adt7410_chip_info *chip = dev_info->dev_data;
|
||||
unsigned long data;
|
||||
int ret;
|
||||
u8 config;
|
||||
|
||||
ret = strict_strtoul(buf, 10, &data);
|
||||
if (ret || data > 3)
|
||||
return -EINVAL;
|
||||
|
||||
ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
config = chip->config & ~ADT7410_FAULT_QUEUE_MASK;
|
||||
config |= data;
|
||||
ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, config);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
chip->config = config;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline ssize_t adt7410_show_t_bound(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
u8 bound_reg,
|
||||
char *buf)
|
||||
{
|
||||
struct iio_dev *dev_info = dev_get_drvdata(dev);
|
||||
struct adt7410_chip_info *chip = dev_info->dev_data;
|
||||
u16 data;
|
||||
int ret;
|
||||
|
||||
ret = adt7410_i2c_read_word(chip, bound_reg, &data);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
return adt7410_convert_temperature(chip, data, buf);
|
||||
}
|
||||
|
||||
static inline ssize_t adt7410_set_t_bound(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
u8 bound_reg,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev *dev_info = dev_get_drvdata(dev);
|
||||
struct adt7410_chip_info *chip = dev_info->dev_data;
|
||||
long tmp1, tmp2;
|
||||
u16 data;
|
||||
char *pos;
|
||||
int ret;
|
||||
|
||||
pos = strchr(buf, '.');
|
||||
|
||||
ret = strict_strtol(buf, 10, &tmp1);
|
||||
|
||||
if (ret || tmp1 > 127 || tmp1 < -128)
|
||||
return -EINVAL;
|
||||
|
||||
if (pos) {
|
||||
len = strlen(pos);
|
||||
|
||||
if (chip->config & ADT7410_RESOLUTION) {
|
||||
if (len > ADT7410_T16_VALUE_FLOAT_OFFSET)
|
||||
len = ADT7410_T16_VALUE_FLOAT_OFFSET;
|
||||
pos[len] = 0;
|
||||
ret = strict_strtol(pos, 10, &tmp2);
|
||||
|
||||
if (!ret)
|
||||
tmp2 = (tmp2 / 78125) * 78125;
|
||||
} else {
|
||||
if (len > ADT7410_T13_VALUE_FLOAT_OFFSET)
|
||||
len = ADT7410_T13_VALUE_FLOAT_OFFSET;
|
||||
pos[len] = 0;
|
||||
ret = strict_strtol(pos, 10, &tmp2);
|
||||
|
||||
if (!ret)
|
||||
tmp2 = (tmp2 / 625) * 625;
|
||||
}
|
||||
}
|
||||
|
||||
if (tmp1 < 0)
|
||||
data = (u16)(-tmp1);
|
||||
else
|
||||
data = (u16)tmp1;
|
||||
|
||||
if (chip->config & ADT7410_RESOLUTION) {
|
||||
data = (data << ADT7410_T16_VALUE_FLOAT_OFFSET) |
|
||||
(tmp2 & ADT7410_T16_VALUE_FLOAT_MASK);
|
||||
|
||||
if (tmp1 < 0)
|
||||
/* convert positive value to supplyment */
|
||||
data = (u16)((ADT7410_T16_VALUE_SIGN << 1) - (u32)data);
|
||||
} else {
|
||||
data = (data << ADT7410_T13_VALUE_FLOAT_OFFSET) |
|
||||
(tmp2 & ADT7410_T13_VALUE_FLOAT_MASK);
|
||||
|
||||
if (tmp1 < 0)
|
||||
/* convert positive value to supplyment */
|
||||
data = (ADT7410_T13_VALUE_SIGN << 1) - data;
|
||||
data <<= ADT7410_T13_VALUE_OFFSET;
|
||||
}
|
||||
|
||||
ret = adt7410_i2c_write_word(chip, bound_reg, data);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t adt7410_show_t_alarm_high(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return adt7410_show_t_bound(dev, attr,
|
||||
ADT7410_T_ALARM_HIGH, buf);
|
||||
}
|
||||
|
||||
static inline ssize_t adt7410_set_t_alarm_high(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
return adt7410_set_t_bound(dev, attr,
|
||||
ADT7410_T_ALARM_HIGH, buf, len);
|
||||
}
|
||||
|
||||
static ssize_t adt7410_show_t_alarm_low(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return adt7410_show_t_bound(dev, attr,
|
||||
ADT7410_T_ALARM_LOW, buf);
|
||||
}
|
||||
|
||||
static inline ssize_t adt7410_set_t_alarm_low(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
return adt7410_set_t_bound(dev, attr,
|
||||
ADT7410_T_ALARM_LOW, buf, len);
|
||||
}
|
||||
|
||||
static ssize_t adt7410_show_t_crit(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
return adt7410_show_t_bound(dev, attr,
|
||||
ADT7410_T_CRIT, buf);
|
||||
}
|
||||
|
||||
static inline ssize_t adt7410_set_t_crit(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
return adt7410_set_t_bound(dev, attr,
|
||||
ADT7410_T_CRIT, buf, len);
|
||||
}
|
||||
|
||||
static ssize_t adt7410_show_t_hyst(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct iio_dev *dev_info = dev_get_drvdata(dev);
|
||||
struct adt7410_chip_info *chip = dev_info->dev_data;
|
||||
int ret;
|
||||
u8 t_hyst;
|
||||
|
||||
ret = adt7410_i2c_read_byte(chip, ADT7410_T_HYST, &t_hyst);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
return sprintf(buf, "%d\n", t_hyst & ADT7410_T_HYST_MASK);
|
||||
}
|
||||
|
||||
static inline ssize_t adt7410_set_t_hyst(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf,
|
||||
size_t len)
|
||||
{
|
||||
struct iio_dev *dev_info = dev_get_drvdata(dev);
|
||||
struct adt7410_chip_info *chip = dev_info->dev_data;
|
||||
int ret;
|
||||
unsigned long data;
|
||||
u8 t_hyst;
|
||||
|
||||
ret = strict_strtol(buf, 10, &data);
|
||||
|
||||
if (ret || data > ADT7410_T_HYST_MASK)
|
||||
return -EINVAL;
|
||||
|
||||
t_hyst = (u8)data;
|
||||
|
||||
ret = adt7410_i2c_write_byte(chip, ADT7410_T_HYST, t_hyst);
|
||||
if (ret)
|
||||
return -EIO;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
IIO_EVENT_ATTR_SH(event_mode, iio_event_adt7410,
|
||||
adt7410_show_event_mode, adt7410_set_event_mode, 0);
|
||||
IIO_EVENT_ATTR_SH(available_event_modes, iio_event_adt7410,
|
||||
adt7410_show_available_event_modes, NULL, 0);
|
||||
IIO_EVENT_ATTR_SH(fault_queue, iio_event_adt7410,
|
||||
adt7410_show_fault_queue, adt7410_set_fault_queue, 0);
|
||||
IIO_EVENT_ATTR_SH(t_alarm_high, iio_event_adt7410,
|
||||
adt7410_show_t_alarm_high, adt7410_set_t_alarm_high, 0);
|
||||
IIO_EVENT_ATTR_SH(t_alarm_low, iio_event_adt7410,
|
||||
adt7410_show_t_alarm_low, adt7410_set_t_alarm_low, 0);
|
||||
IIO_EVENT_ATTR_SH(t_crit, iio_event_adt7410_ct,
|
||||
adt7410_show_t_crit, adt7410_set_t_crit, 0);
|
||||
IIO_EVENT_ATTR_SH(t_hyst, iio_event_adt7410,
|
||||
adt7410_show_t_hyst, adt7410_set_t_hyst, 0);
|
||||
|
||||
static struct attribute *adt7410_event_int_attributes[] = {
|
||||
&iio_event_attr_event_mode.dev_attr.attr,
|
||||
&iio_event_attr_available_event_modes.dev_attr.attr,
|
||||
&iio_event_attr_fault_queue.dev_attr.attr,
|
||||
&iio_event_attr_t_alarm_high.dev_attr.attr,
|
||||
&iio_event_attr_t_alarm_low.dev_attr.attr,
|
||||
&iio_event_attr_t_hyst.dev_attr.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct attribute *adt7410_event_ct_attributes[] = {
|
||||
&iio_event_attr_event_mode.dev_attr.attr,
|
||||
&iio_event_attr_available_event_modes.dev_attr.attr,
|
||||
&iio_event_attr_fault_queue.dev_attr.attr,
|
||||
&iio_event_attr_t_crit.dev_attr.attr,
|
||||
&iio_event_attr_t_hyst.dev_attr.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct attribute_group adt7410_event_attribute_group[ADT7410_IRQS] = {
|
||||
{
|
||||
.attrs = adt7410_event_int_attributes,
|
||||
},
|
||||
{
|
||||
.attrs = adt7410_event_ct_attributes,
|
||||
}
|
||||
};
|
||||
|
||||
/*
|
||||
* device probe and remove
|
||||
*/
|
||||
|
||||
static int __devinit adt7410_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct adt7410_chip_info *chip;
|
||||
int ret = 0;
|
||||
unsigned long *adt7410_platform_data = client->dev.platform_data;
|
||||
|
||||
chip = kzalloc(sizeof(struct adt7410_chip_info), GFP_KERNEL);
|
||||
|
||||
if (chip == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
/* this is only used for device removal purposes */
|
||||
i2c_set_clientdata(client, chip);
|
||||
|
||||
chip->client = client;
|
||||
chip->name = id->name;
|
||||
|
||||
chip->indio_dev = iio_allocate_device();
|
||||
if (chip->indio_dev == NULL) {
|
||||
ret = -ENOMEM;
|
||||
goto error_free_chip;
|
||||
}
|
||||
|
||||
chip->indio_dev->dev.parent = &client->dev;
|
||||
chip->indio_dev->attrs = &adt7410_attribute_group;
|
||||
chip->indio_dev->event_attrs = adt7410_event_attribute_group;
|
||||
chip->indio_dev->dev_data = (void *)chip;
|
||||
chip->indio_dev->driver_module = THIS_MODULE;
|
||||
chip->indio_dev->num_interrupt_lines = ADT7410_IRQS;
|
||||
chip->indio_dev->modes = INDIO_DIRECT_MODE;
|
||||
|
||||
ret = iio_device_register(chip->indio_dev);
|
||||
if (ret)
|
||||
goto error_free_dev;
|
||||
|
||||
/* CT critcal temperature event. line 0 */
|
||||
if (client->irq) {
|
||||
ret = iio_register_interrupt_line(client->irq,
|
||||
chip->indio_dev,
|
||||
0,
|
||||
IRQF_TRIGGER_LOW,
|
||||
chip->name);
|
||||
if (ret)
|
||||
goto error_unreg_dev;
|
||||
|
||||
/*
|
||||
* The event handler list element refer to iio_event_adt7410.
|
||||
* All event attributes bind to the same event handler.
|
||||
* One event handler can only be added to one event list.
|
||||
*/
|
||||
iio_add_event_to_list(&iio_event_adt7410,
|
||||
&chip->indio_dev->interrupts[0]->ev_list);
|
||||
}
|
||||
|
||||
/* INT bound temperature alarm event. line 1 */
|
||||
if (adt7410_platform_data[0]) {
|
||||
ret = iio_register_interrupt_line(adt7410_platform_data[0],
|
||||
chip->indio_dev,
|
||||
1,
|
||||
adt7410_platform_data[1],
|
||||
chip->name);
|
||||
if (ret)
|
||||
goto error_unreg_ct_irq;
|
||||
|
||||
/*
|
||||
* The event handler list element refer to iio_event_adt7410.
|
||||
* All event attributes bind to the same event handler.
|
||||
* One event handler can only be added to one event list.
|
||||
*/
|
||||
iio_add_event_to_list(&iio_event_adt7410_ct,
|
||||
&chip->indio_dev->interrupts[1]->ev_list);
|
||||
}
|
||||
|
||||
if (client->irq && adt7410_platform_data[0]) {
|
||||
INIT_WORK(&chip->thresh_work, adt7410_interrupt_bh);
|
||||
|
||||
ret = adt7410_i2c_read_byte(chip, ADT7410_CONFIG, &chip->config);
|
||||
if (ret) {
|
||||
ret = -EIO;
|
||||
goto error_unreg_int_irq;
|
||||
}
|
||||
|
||||
/* set irq polarity low level */
|
||||
chip->config &= ~ADT7410_CT_POLARITY;
|
||||
|
||||
if (adt7410_platform_data[1] & IRQF_TRIGGER_HIGH)
|
||||
chip->config |= ADT7410_INT_POLARITY;
|
||||
else
|
||||
chip->config &= ~ADT7410_INT_POLARITY;
|
||||
|
||||
ret = adt7410_i2c_write_byte(chip, ADT7410_CONFIG, chip->config);
|
||||
if (ret) {
|
||||
ret = -EIO;
|
||||
goto error_unreg_int_irq;
|
||||
}
|
||||
}
|
||||
|
||||
dev_info(&client->dev, "%s temperature sensor registered.\n",
|
||||
id->name);
|
||||
|
||||
return 0;
|
||||
|
||||
error_unreg_int_irq:
|
||||
iio_unregister_interrupt_line(chip->indio_dev, 1);
|
||||
error_unreg_ct_irq:
|
||||
iio_unregister_interrupt_line(chip->indio_dev, 0);
|
||||
error_unreg_dev:
|
||||
iio_device_unregister(chip->indio_dev);
|
||||
error_free_dev:
|
||||
iio_free_device(chip->indio_dev);
|
||||
error_free_chip:
|
||||
kfree(chip);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit adt7410_remove(struct i2c_client *client)
|
||||
{
|
||||
struct adt7410_chip_info *chip = i2c_get_clientdata(client);
|
||||
struct iio_dev *indio_dev = chip->indio_dev;
|
||||
unsigned long *adt7410_platform_data = client->dev.platform_data;
|
||||
|
||||
if (adt7410_platform_data[0])
|
||||
iio_unregister_interrupt_line(indio_dev, 1);
|
||||
if (client->irq)
|
||||
iio_unregister_interrupt_line(indio_dev, 0);
|
||||
iio_device_unregister(indio_dev);
|
||||
iio_free_device(chip->indio_dev);
|
||||
kfree(chip);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id adt7410_id[] = {
|
||||
{ "adt7410", 0 },
|
||||
{}
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(i2c, adt7410_id);
|
||||
|
||||
static struct i2c_driver adt7410_driver = {
|
||||
.driver = {
|
||||
.name = "adt7410",
|
||||
},
|
||||
.probe = adt7410_probe,
|
||||
.remove = __devexit_p(adt7410_remove),
|
||||
.id_table = adt7410_id,
|
||||
};
|
||||
|
||||
static __init int adt7410_init(void)
|
||||
{
|
||||
return i2c_add_driver(&adt7410_driver);
|
||||
}
|
||||
|
||||
static __exit void adt7410_exit(void)
|
||||
{
|
||||
i2c_del_driver(&adt7410_driver);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
|
||||
MODULE_DESCRIPTION("Analog Devices ADT7410 digital"
|
||||
" temperature sensor driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
module_init(adt7410_init);
|
||||
module_exit(adt7410_exit);
|
Loading…
Reference in a new issue