iio: adc: remove ADT75 driver - hwmon/lm75 will take over ADT75 support (cdea0bec) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/staging/iio/adc/Kconfig

+0 −7

Original line number	Original line	Diff line number	Diff line
	@@ -169,13 +169,6 @@ config AD7192
	To compile this driver as a module, choose M here: the		To compile this driver as a module, choose M here: the
	module will be called ad7192.		module will be called ad7192.

	config ADT75
	tristate "Analog Devices ADT75 temperature sensor driver"
	depends on I2C
	help
	Say yes here to build support for Analog Devices ADT75
	temperature sensors.

	config ADT7310		config ADT7310
	tristate "Analog Devices ADT7310 temperature sensor driver"		tristate "Analog Devices ADT7310 temperature sensor driver"
	depends on SPI		depends on SPI

drivers/staging/iio/adc/Makefile

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -37,7 +37,6 @@ obj-$(CONFIG_AD7780) += ad7780.o
	obj-$(CONFIG_AD7793) += ad7793.o		obj-$(CONFIG_AD7793) += ad7793.o
	obj-$(CONFIG_AD7816) += ad7816.o		obj-$(CONFIG_AD7816) += ad7816.o
	obj-$(CONFIG_AD7192) += ad7192.o		obj-$(CONFIG_AD7192) += ad7192.o
	obj-$(CONFIG_ADT75) += adt75.o
	obj-$(CONFIG_ADT7310) += adt7310.o		obj-$(CONFIG_ADT7310) += adt7310.o
	obj-$(CONFIG_ADT7410) += adt7410.o		obj-$(CONFIG_ADT7410) += adt7410.o
	obj-$(CONFIG_AD7280) += ad7280a.o		obj-$(CONFIG_AD7280) += ad7280a.o

drivers/staging/iio/adc/adt75.c

deleted100644 → 0

+0 −655

Original line number	Original line	Diff line number	Diff line
	/*
	* ADT75 digital temperature sensor driver supporting ADT75
	*
	* Copyright 2010 Analog Devices Inc.
	*
	* Licensed under the GPL-2 or later.
	*/

	#include <linux/interrupt.h>
	#include <linux/device.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/sysfs.h>
	#include <linux/i2c.h>
	#include <linux/module.h>

	#include "../iio.h"
	#include "../sysfs.h"

	/*
	* ADT75 registers definition
	*/

	#define ADT75_TEMPERATURE 0
	#define ADT75_CONFIG 1
	#define ADT75_T_HYST 2
	#define ADT75_T_OS 3
	#define ADT75_ONESHOT 4

	/*
	* ADT75 config
	*/
	#define ADT75_PD 0x1
	#define ADT75_OS_INT 0x2
	#define ADT75_OS_POLARITY 0x4
	#define ADT75_FAULT_QUEUE_MASK 0x18
	#define ADT75_FAULT_QUEUE_OFFSET 3
	#define ADT75_SMBUS_ALART 0x8

	/*
	* ADT75 masks
	*/
	#define ADT75_VALUE_SIGN 0x800
	#define ADT75_VALUE_OFFSET 4
	#define ADT75_VALUE_FLOAT_OFFSET 4
	#define ADT75_VALUE_FLOAT_MASK 0xF


	/*
	* struct adt75_chip_info - chip specifc information
	*/

	struct adt75_chip_info {
	struct i2c_client *client;
	u8 config;
	};

	/*
	* adt75 register access by I2C
	*/

	static int adt75_i2c_read(struct iio_dev dev_info, u8 reg, u8 data)
	{
	struct adt75_chip_info *chip = iio_priv(dev_info);
	struct i2c_client *client = chip->client;
	int ret = 0, len;

	ret = i2c_smbus_write_byte(client, reg);
	if (ret < 0) {
	dev_err(&client->dev, "I2C read register address error\n");
	return ret;
	}

	if (reg == ADT75_CONFIG \|\| reg == ADT75_ONESHOT)
	len = 1;
	else
	len = 2;

	ret = i2c_master_recv(client, data, len);
	if (ret < 0) {
	dev_err(&client->dev, "I2C read error\n");
	return ret;
	}

	return ret;
	}

	static int adt75_i2c_write(struct iio_dev *dev_info, u8 reg, u8 data)
	{
	struct adt75_chip_info *chip = iio_priv(dev_info);
	struct i2c_client *client = chip->client;
	int ret = 0;

	if (reg == ADT75_CONFIG \|\| reg == ADT75_ONESHOT)
	ret = i2c_smbus_write_byte_data(client, reg, data);
	else
	ret = i2c_smbus_write_word_data(client, reg, data);

	if (ret < 0)
	dev_err(&client->dev, "I2C write error\n");

	return ret;
	}

	static ssize_t adt75_show_mode(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));

	if (chip->config & ADT75_PD)
	return sprintf(buf, "power-save\n");
	else
	return sprintf(buf, "full\n");
	}

	static ssize_t adt75_store_mode(struct device *dev,
	struct device_attribute *attr,
	const char *buf,
	size_t len)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	int ret;
	u8 config;

	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	config = chip->config & ~ADT75_PD;
	if (!strcmp(buf, "full"))
	config \|= ADT75_PD;

	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
	if (ret)
	return -EIO;

	chip->config = config;

	return ret;
	}

	static IIO_DEVICE_ATTR(mode, S_IRUGO \| S_IWUSR,
	adt75_show_mode,
	adt75_store_mode,
	0);

	static ssize_t adt75_show_available_modes(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	return sprintf(buf, "full\npower-down\n");
	}

	static IIO_DEVICE_ATTR(available_modes, S_IRUGO, adt75_show_available_modes, NULL, 0);

	static ssize_t adt75_show_oneshot(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct adt75_chip_info *chip = iio_priv(dev_get_drvdata(dev));

	return sprintf(buf, "%d\n", !!(chip->config & ADT75_ONESHOT));
	}

	static ssize_t adt75_store_oneshot(struct device *dev,
	struct device_attribute *attr,
	const char *buf,
	size_t len)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	unsigned long data = 0;
	int ret;
	u8 config;

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


	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	config = chip->config & ~ADT75_ONESHOT;
	if (data)
	config \|= ADT75_ONESHOT;

	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
	if (ret)
	return -EIO;

	chip->config = config;

	return ret;
	}

	static IIO_DEVICE_ATTR(oneshot, S_IRUGO \| S_IWUSR,
	adt75_show_oneshot,
	adt75_store_oneshot,
	0);

	static ssize_t adt75_show_value(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	u16 data;
	char sign = ' ';
	int ret;

	if (chip->config & ADT75_PD) {
	dev_err(dev, "Can't read value in power-down mode.\n");
	return -EIO;
	}

	if (chip->config & ADT75_ONESHOT) {
	/* write to active converter */
	ret = i2c_smbus_write_byte(chip->client, ADT75_ONESHOT);
	if (ret)
	return -EIO;
	}

	ret = adt75_i2c_read(dev_info, ADT75_TEMPERATURE, (u8 *)&data);
	if (ret)
	return -EIO;

	data = swab16(data) >> ADT75_VALUE_OFFSET;
	if (data & ADT75_VALUE_SIGN) {
	/* convert supplement to positive value */
	data = (ADT75_VALUE_SIGN << 1) - data;
	sign = '-';
	}

	return sprintf(buf, "%c%d.%.4d\n", sign,
	(data >> ADT75_VALUE_FLOAT_OFFSET),
	(data & ADT75_VALUE_FLOAT_MASK) * 625);
	}

	static IIO_DEVICE_ATTR(value, S_IRUGO, adt75_show_value, NULL, 0);

	static struct attribute *adt75_attributes[] = {
	&iio_dev_attr_available_modes.dev_attr.attr,
	&iio_dev_attr_mode.dev_attr.attr,
	&iio_dev_attr_oneshot.dev_attr.attr,
	&iio_dev_attr_value.dev_attr.attr,
	NULL,
	};

	static const struct attribute_group adt75_attribute_group = {
	.attrs = adt75_attributes,
	};

	/*
	* temperature bound events
	*/

	#define IIO_EVENT_CODE_ADT75_OTI IIO_UNMOD_EVENT_CODE(IIO_TEMP, \
	0, \
	IIO_EV_TYPE_THRESH, \
	IIO_EV_DIR_FALLING)

	static irqreturn_t adt75_event_handler(int irq, void *private)
	{
	iio_push_event(private,
	IIO_EVENT_CODE_ADT75_OTI,
	iio_get_time_ns());

	return IRQ_HANDLED;
	}

	static ssize_t adt75_show_oti_mode(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	int ret;

	/* retrive ALART status */
	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	if (chip->config & ADT75_OS_INT)
	return sprintf(buf, "interrupt\n");
	else
	return sprintf(buf, "comparator\n");
	}

	static ssize_t adt75_set_oti_mode(struct device *dev,
	struct device_attribute *attr,
	const char *buf,
	size_t len)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	int ret;
	u8 config;

	/* retrive ALART status */
	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	config = chip->config & ~ADT75_OS_INT;
	if (strcmp(buf, "comparator") != 0)
	config \|= ADT75_OS_INT;

	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
	if (ret)
	return -EIO;

	chip->config = config;

	return ret;
	}

	static ssize_t adt75_show_available_oti_modes(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	return sprintf(buf, "comparator\ninterrupt\n");
	}

	static ssize_t adt75_show_smbus_alart(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	int ret;

	/* retrive ALART status */
	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	return sprintf(buf, "%d\n", !!(chip->config & ADT75_SMBUS_ALART));
	}

	static ssize_t adt75_set_smbus_alart(struct device *dev,
	struct device_attribute *attr,
	const char *buf,
	size_t len)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	unsigned long data = 0;
	int ret;
	u8 config;

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

	/* retrive ALART status */
	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	config = chip->config & ~ADT75_SMBUS_ALART;
	if (data)
	config \|= ADT75_SMBUS_ALART;

	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
	if (ret)
	return -EIO;

	chip->config = config;

	return ret;
	}

	static ssize_t adt75_show_fault_queue(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	struct adt75_chip_info *chip = iio_priv(dev_info);
	int ret;

	/* retrive ALART status */
	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	return sprintf(buf, "%d\n", (chip->config & ADT75_FAULT_QUEUE_MASK) >>
	ADT75_FAULT_QUEUE_OFFSET);
	}

	static ssize_t adt75_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 adt75_chip_info *chip = iio_priv(dev_info);
	unsigned long data;
	int ret;
	u8 config;

	ret = strict_strtoul(buf, 10, &data);
	if (ret \|\| data > 3)
	return -EINVAL;

	/* retrive ALART status */
	ret = adt75_i2c_read(dev_info, ADT75_CONFIG, &chip->config);
	if (ret)
	return -EIO;

	config = chip->config & ~ADT75_FAULT_QUEUE_MASK;
	config \|= (data << ADT75_FAULT_QUEUE_OFFSET);
	ret = adt75_i2c_write(dev_info, ADT75_CONFIG, config);
	if (ret)
	return -EIO;

	chip->config = config;

	return ret;
	}
	static inline ssize_t adt75_show_t_bound(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	u16 data;
	char sign = ' ';
	int ret;

	ret = adt75_i2c_read(dev_info, this_attr->address, (u8 *)&data);
	if (ret)
	return -EIO;

	data = swab16(data) >> ADT75_VALUE_OFFSET;
	if (data & ADT75_VALUE_SIGN) {
	/* convert supplement to positive value */
	data = (ADT75_VALUE_SIGN << 1) - data;
	sign = '-';
	}

	return sprintf(buf, "%c%d.%.4d\n", sign,
	(data >> ADT75_VALUE_FLOAT_OFFSET),
	(data & ADT75_VALUE_FLOAT_MASK) * 625);
	}

	static inline ssize_t adt75_set_t_bound(struct device *dev,
	struct device_attribute *attr,
	const char *buf,
	size_t len)
	{
	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
	struct iio_dev *dev_info = dev_get_drvdata(dev);
	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 (len > ADT75_VALUE_FLOAT_OFFSET)
	len = ADT75_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;
	data = (data << ADT75_VALUE_FLOAT_OFFSET) \| (tmp2 & ADT75_VALUE_FLOAT_MASK);
	if (tmp1 < 0)
	/* convert positive value to supplyment */
	data = (ADT75_VALUE_SIGN << 1) - data;
	data <<= ADT75_VALUE_OFFSET;
	data = swab16(data);

	ret = adt75_i2c_write(dev_info, this_attr->address, (u8)data);
	if (ret)
	return -EIO;

	return ret;
	}


	static IIO_DEVICE_ATTR(oti_mode,
	S_IRUGO \| S_IWUSR,
	adt75_show_oti_mode, adt75_set_oti_mode, 0);
	static IIO_DEVICE_ATTR(available_oti_modes,
	S_IRUGO,
	adt75_show_available_oti_modes, NULL, 0);
	static IIO_DEVICE_ATTR(smbus_alart,
	S_IRUGO \| S_IWUSR,
	adt75_show_smbus_alart, adt75_set_smbus_alart, 0);
	static IIO_DEVICE_ATTR(fault_queue,
	S_IRUGO \| S_IWUSR,
	adt75_show_fault_queue, adt75_set_fault_queue, 0);
	static IIO_DEVICE_ATTR(t_os_value,
	S_IRUGO \| S_IWUSR,
	adt75_show_t_bound, adt75_set_t_bound,
	ADT75_T_OS);
	static IIO_DEVICE_ATTR(t_hyst_value,
	S_IRUGO \| S_IWUSR,
	adt75_show_t_bound, adt75_set_t_bound,
	ADT75_T_HYST);

	static struct attribute *adt75_event_attributes[] = {
	&iio_dev_attr_oti_mode.dev_attr.attr,
	&iio_dev_attr_available_oti_modes.dev_attr.attr,
	&iio_dev_attr_smbus_alart.dev_attr.attr,
	&iio_dev_attr_fault_queue.dev_attr.attr,
	&iio_dev_attr_t_os_value.dev_attr.attr,
	&iio_dev_attr_t_hyst_value.dev_attr.attr,
	NULL,
	};

	static struct attribute_group adt75_event_attribute_group = {
	.attrs = adt75_event_attributes,
	.name = "events",
	};

	static const struct iio_info adt75_info = {
	.attrs = &adt75_attribute_group,
	.event_attrs = &adt75_event_attribute_group,
	.driver_module = THIS_MODULE,
	};

	/*
	* device probe and remove
	*/

	static int __devinit adt75_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct adt75_chip_info *chip;
	struct iio_dev *indio_dev;
	int ret = 0;

	indio_dev = iio_allocate_device(sizeof(*chip));
	if (indio_dev == NULL) {
	ret = -ENOMEM;
	goto error_ret;
	}
	chip = iio_priv(indio_dev);

	/* this is only used for device removal purposes */
	i2c_set_clientdata(client, indio_dev);

	chip->client = client;

	indio_dev->name = id->name;
	indio_dev->dev.parent = &client->dev;
	indio_dev->info = &adt75_info;
	indio_dev->modes = INDIO_DIRECT_MODE;

	if (client->irq > 0) {
	ret = request_threaded_irq(client->irq,
	NULL,
	&adt75_event_handler,
	IRQF_TRIGGER_LOW,
	indio_dev->name,
	indio_dev);
	if (ret)
	goto error_free_dev;

	ret = adt75_i2c_read(indio_dev, ADT75_CONFIG, &chip->config);
	if (ret) {
	ret = -EIO;
	goto error_unreg_irq;
	}

	/* set irq polarity low level */
	chip->config &= ~ADT75_OS_POLARITY;

	ret = adt75_i2c_write(indio_dev, ADT75_CONFIG, chip->config);
	if (ret) {
	ret = -EIO;
	goto error_unreg_irq;
	}
	}

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

	dev_info(&client->dev, "%s temperature sensor registered.\n",
	indio_dev->name);

	return 0;
	error_unreg_irq:
	free_irq(client->irq, indio_dev);
	error_free_dev:
	iio_free_device(indio_dev);
	error_ret:
	return ret;
	}

	static int __devexit adt75_remove(struct i2c_client *client)
	{
	struct iio_dev *indio_dev = i2c_get_clientdata(client);

	if (client->irq)
	free_irq(client->irq, indio_dev);
	iio_device_unregister(indio_dev);

	return 0;
	}

	static const struct i2c_device_id adt75_id[] = {
	{ "adt75", 0 },
	{}
	};

	MODULE_DEVICE_TABLE(i2c, adt75_id);

	static struct i2c_driver adt75_driver = {
	.driver = {
	.name = "adt75",
	},
	.probe = adt75_probe,
	.remove = __devexit_p(adt75_remove),
	.id_table = adt75_id,
	};

	static __init int adt75_init(void)
	{
	return i2c_add_driver(&adt75_driver);
	}

	static __exit void adt75_exit(void)
	{
	i2c_del_driver(&adt75_driver);
	}

	MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
	MODULE_DESCRIPTION("Analog Devices ADT75 digital"
	" temperature sensor driver");
	MODULE_LICENSE("GPL v2");

	module_init(adt75_init);
	module_exit(adt75_exit);