staging:iio:adc:ad7314 removal. Supported via hwmon.

Driver ported over to hwmon where it fits much better.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/adc/Kconfig

@@ -34,13 +34,6 @@ config AD7298
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad7298.
 
-config AD7314
-	tristate "Analog Devices AD7314 temperature sensor driver"
-	depends on SPI
-	help
-	  Say yes here to build support for Analog Devices AD7314
-	  temperature sensors.
-
 config AD7606
 	tristate "Analog Devices AD7606 ADC driver"
 	depends on GPIOLIB

drivers/staging/iio/adc/Makefile

@@ -32,7 +32,6 @@ obj-$(CONFIG_AD7298) += ad7298.o
 obj-$(CONFIG_AD7150) += ad7150.o
 obj-$(CONFIG_AD7152) += ad7152.o
 obj-$(CONFIG_AD7291) += ad7291.o
-obj-$(CONFIG_AD7314) += ad7314.o
 obj-$(CONFIG_AD7746) += ad7746.o
 obj-$(CONFIG_AD7780) += ad7780.o
 obj-$(CONFIG_AD7793) += ad7793.o

drivers/staging/iio/adc/ad7314.c

-/*
- * AD7314 digital temperature sensor driver for AD7314, ADT7301 and ADT7302
- *
- * Copyright 2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/sysfs.h>
-#include <linux/spi/spi.h>
-#include <linux/module.h>
-
-#include "../iio.h"
-#include "../sysfs.h"
-
-/*
- * AD7314 power mode
- */
-#define AD7314_PD		0x2000
-
-/*
- * AD7314 temperature masks
- */
-#define AD7314_TEMP_SIGN		0x200
-#define AD7314_TEMP_MASK		0x7FE0
-#define AD7314_TEMP_OFFSET		5
-#define AD7314_TEMP_FLOAT_OFFSET	2
-#define AD7314_TEMP_FLOAT_MASK		0x3
-
-/*
- * ADT7301 and ADT7302 temperature masks
- */
-#define ADT7301_TEMP_SIGN		0x2000
-#define ADT7301_TEMP_MASK		0x2FFF
-#define ADT7301_TEMP_FLOAT_OFFSET	5
-#define ADT7301_TEMP_FLOAT_MASK		0x1F
-
-/*
- * struct ad7314_chip_info - chip specifc information
- */
-
-struct ad7314_chip_info {
-	struct spi_device *spi_dev;
-	s64 last_timestamp;
-	u8  mode;
-};
-
-/*
- * ad7314 register access by SPI
- */
-
-static int ad7314_spi_read(struct ad7314_chip_info *chip, u16 *data)
-{
-	struct spi_device *spi_dev = chip->spi_dev;
-	int ret = 0;
-	u16 value;
-
-	ret = spi_read(spi_dev, (u8 *)&value, sizeof(value));
-	if (ret < 0) {
-		dev_err(&spi_dev->dev, "SPI read error\n");
-		return ret;
-	}
-
-	*data = be16_to_cpu((u16)value);
-
-	return ret;
-}
-
-static int ad7314_spi_write(struct ad7314_chip_info *chip, u16 data)
-{
-	struct spi_device *spi_dev = chip->spi_dev;
-	int ret = 0;
-	u16 value = cpu_to_be16(data);
-
-	ret = spi_write(spi_dev, (u8 *)&value, sizeof(value));
-	if (ret < 0)
-		dev_err(&spi_dev->dev, "SPI write error\n");
-
-	return ret;
-}
-
-static ssize_t ad7314_show_mode(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7314_chip_info *chip = iio_priv(dev_info);
-
-	if (chip->mode)
-		return sprintf(buf, "power-save\n");
-	else
-		return sprintf(buf, "full\n");
-}
-
-static ssize_t ad7314_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 ad7314_chip_info *chip = iio_priv(dev_info);
-	u16 mode = 0;
-	int ret;
-
-	if (!strcmp(buf, "full"))
-		mode = AD7314_PD;
-
-	ret = ad7314_spi_write(chip, mode);
-	if (ret)
-		return -EIO;
-
-	chip->mode = mode;
-
-	return len;
-}
-
-static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
-		ad7314_show_mode,
-		ad7314_store_mode,
-		0);
-
-static ssize_t ad7314_show_available_modes(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	return sprintf(buf, "full\npower-save\n");
-}
-
-static IIO_DEVICE_ATTR(available_modes, S_IRUGO, ad7314_show_available_modes, NULL, 0);
-
-static ssize_t ad7314_show_temperature(struct device *dev,
-		struct device_attribute *attr,
-		char *buf)
-{
-	struct iio_dev *dev_info = dev_get_drvdata(dev);
-	struct ad7314_chip_info *chip = iio_priv(dev_info);
-	u16 data;
-	char sign = ' ';
-	int ret;
-
-	if (chip->mode) {
-		ret = ad7314_spi_write(chip, 0);
-		if (ret)
-			return -EIO;
-	}
-
-	ret = ad7314_spi_read(chip, &data);
-	if (ret)
-		return -EIO;
-
-	if (chip->mode)
-		ad7314_spi_write(chip, chip->mode);
-
-	if (strcmp(dev_info->name, "ad7314")) {
-		data = (data & AD7314_TEMP_MASK) >>
-			AD7314_TEMP_OFFSET;
-		if (data & AD7314_TEMP_SIGN) {
-			data = (AD7314_TEMP_SIGN << 1) - data;
-			sign = '-';
-		}
-
-		return sprintf(buf, "%c%d.%.2d\n", sign,
-				data >> AD7314_TEMP_FLOAT_OFFSET,
-				(data & AD7314_TEMP_FLOAT_MASK) * 25);
-	} else {
-		data &= ADT7301_TEMP_MASK;
-		if (data & ADT7301_TEMP_SIGN) {
-			data = (ADT7301_TEMP_SIGN << 1) - data;
-			sign = '-';
-		}
-
-		return sprintf(buf, "%c%d.%.5d\n", sign,
-				data >> ADT7301_TEMP_FLOAT_OFFSET,
-				(data & ADT7301_TEMP_FLOAT_MASK) * 3125);
-	}
-}
-
-static IIO_DEVICE_ATTR(temperature, S_IRUGO, ad7314_show_temperature, NULL, 0);
-
-static struct attribute *ad7314_attributes[] = {
-	&iio_dev_attr_available_modes.dev_attr.attr,
-	&iio_dev_attr_mode.dev_attr.attr,
-	&iio_dev_attr_temperature.dev_attr.attr,
-	NULL,
-};
-
-static const struct attribute_group ad7314_attribute_group = {
-	.attrs = ad7314_attributes,
-};
-
-static const struct iio_info ad7314_info = {
-	.attrs = &ad7314_attribute_group,
-	.driver_module = THIS_MODULE,
-};
-/*
- * device probe and remove
- */
-
-static int __devinit ad7314_probe(struct spi_device *spi_dev)
-{
-	struct ad7314_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 */
-	dev_set_drvdata(&spi_dev->dev, chip);
-
-	chip->spi_dev = spi_dev;
-
-	indio_dev->name = spi_get_device_id(spi_dev)->name;
-	indio_dev->dev.parent = &spi_dev->dev;
-	indio_dev->info = &ad7314_info;
-
-	ret = iio_device_register(indio_dev);
-	if (ret)
-		goto error_free_dev;
-
-	dev_info(&spi_dev->dev, "%s temperature sensor registered.\n",
-			 indio_dev->name);
-
-	return 0;
-error_free_dev:
-	iio_free_device(indio_dev);
-error_ret:
-	return ret;
-}
-
-static int __devexit ad7314_remove(struct spi_device *spi_dev)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev);
-
-	dev_set_drvdata(&spi_dev->dev, NULL);
-	iio_device_unregister(indio_dev);
-
-	return 0;
-}
-
-static const struct spi_device_id ad7314_id[] = {
-	{ "adt7301", 0 },
-	{ "adt7302", 0 },
-	{ "ad7314", 0 },
-	{}
-};
-
-static struct spi_driver ad7314_driver = {
-	.driver = {
-		.name = "ad7314",
-		.bus = &spi_bus_type,
-		.owner = THIS_MODULE,
-	},
-	.probe = ad7314_probe,
-	.remove = __devexit_p(ad7314_remove),
-	.id_table = ad7314_id,
-};
-
-static __init int ad7314_init(void)
-{
-	return spi_register_driver(&ad7314_driver);
-}
-
-static __exit void ad7314_exit(void)
-{
-	spi_unregister_driver(&ad7314_driver);
-}
-
-MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
-MODULE_DESCRIPTION("Analog Devices AD7314, ADT7301 and ADT7302 digital"
-			" temperature sensor driver");
-MODULE_LICENSE("GPL v2");
-
-module_init(ad7314_init);
-module_exit(ad7314_exit);