hwmon: remove s3c driver

The s3c adc driver was removed along with the s3c24xx platform, so the
hwmon driver is orphaned and can be removed.

Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 0 insertions, 397 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 3176c33af6c6..497cbfb460e5 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1749,23 +1749,6 @@ config SENSORS_SHTC1
 	  This driver can also be built as a module. If so, the module
 	  will be called shtc1.
 
-config SENSORS_S3C
-	tristate "Samsung built-in ADC"
-	depends on S3C_ADC
-	help
-	  If you say yes here you get support for the on-board ADCs of
-	  the Samsung S3C24XX, S3C64XX and other series of SoC
-
-	  This driver can also be built as a module. If so, the module
-	  will be called s3c-hwmon.
-
-config SENSORS_S3C_RAW
-	bool "Include raw channel attributes in sysfs"
-	depends on SENSORS_S3C
-	help
-	  Say Y here if you want to include raw copies of all the ADC
-	  channels in sysfs.
-
 config SENSORS_SIS5595
 	tristate "Silicon Integrated Systems Corp. SiS5595"
 	depends on PCI
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index e2e4e87b282f..4f71d9807dae 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -174,7 +174,6 @@ obj-$(CONFIG_SENSORS_PCF8591)	+= pcf8591.o
 obj-$(CONFIG_SENSORS_POWR1220)  += powr1220.o
 obj-$(CONFIG_SENSORS_PWM_FAN)	+= pwm-fan.o
 obj-$(CONFIG_SENSORS_RASPBERRYPI_HWMON)	+= raspberrypi-hwmon.o
-obj-$(CONFIG_SENSORS_S3C)	+= s3c-hwmon.o
 obj-$(CONFIG_SENSORS_SBTSI)	+= sbtsi_temp.o
 obj-$(CONFIG_SENSORS_SBRMI)	+= sbrmi.o
 obj-$(CONFIG_SENSORS_SCH56XX_COMMON)+= sch56xx-common.o
diff --git a/drivers/hwmon/s3c-hwmon.c b/drivers/hwmon/s3c-hwmon.c
deleted file mode 100644
index 70ae665db477..000000000000
--- a/drivers/hwmon/s3c-hwmon.c
+++ /dev/null
@@ -1,379 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* linux/drivers/hwmon/s3c-hwmon.c
- *
- * Copyright (C) 2005, 2008, 2009 Simtec Electronics
- *	http://armlinux.simtec.co.uk/
- *	Ben Dooks <ben@simtec.co.uk>
- *
- * S3C24XX/S3C64XX ADC hwmon support
-*/
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-
-#include <linux/soc/samsung/s3c-adc.h>
-#include <linux/platform_data/hwmon-s3c.h>
-
-struct s3c_hwmon_attr {
-	struct sensor_device_attribute	in;
-	struct sensor_device_attribute	label;
-	char				in_name[12];
-	char				label_name[12];
-};
-
-/**
- * struct s3c_hwmon - ADC hwmon client information
- * @lock: Access lock to serialise the conversions.
- * @client: The client we registered with the S3C ADC core.
- * @hwmon_dev: The hwmon device we created.
- * @attr: The holders for the channel attributes.
-*/
-struct s3c_hwmon {
-	struct mutex		lock;
-	struct s3c_adc_client	*client;
-	struct device		*hwmon_dev;
-
-	struct s3c_hwmon_attr	attrs[8];
-};
-
-/**
- * s3c_hwmon_read_ch - read a value from a given adc channel.
- * @dev: The device.
- * @hwmon: Our state.
- * @channel: The channel we're reading from.
- *
- * Read a value from the @channel with the proper locking and sleep until
- * either the read completes or we timeout awaiting the ADC core to get
- * back to us.
- */
-static int s3c_hwmon_read_ch(struct device *dev,
-			     struct s3c_hwmon *hwmon, int channel)
-{
-	int ret;
-
-	ret = mutex_lock_interruptible(&hwmon->lock);
-	if (ret < 0)
-		return ret;
-
-	dev_dbg(dev, "reading channel %d\n", channel);
-
-	ret = s3c_adc_read(hwmon->client, channel);
-	mutex_unlock(&hwmon->lock);
-
-	return ret;
-}
-
-#ifdef CONFIG_SENSORS_S3C_RAW
-/**
- * s3c_hwmon_show_raw - show a conversion from the raw channel number.
- * @dev: The device that the attribute belongs to.
- * @attr: The attribute being read.
- * @buf: The result buffer.
- *
- * This show deals with the raw attribute, registered for each possible
- * ADC channel. This does a conversion and returns the raw (un-scaled)
- * value returned from the hardware.
- */
-static ssize_t s3c_hwmon_show_raw(struct device *dev,
-				  struct device_attribute *attr, char *buf)
-{
-	struct s3c_hwmon *adc = dev_get_drvdata(dev);
-	struct sensor_device_attribute *sa = to_sensor_dev_attr(attr);
-	int ret;
-
-	ret = s3c_hwmon_read_ch(dev, adc, sa->index);
-
-	return  (ret < 0) ? ret : snprintf(buf, PAGE_SIZE, "%d\n", ret);
-}
-
-static SENSOR_DEVICE_ATTR(adc0_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 0);
-static SENSOR_DEVICE_ATTR(adc1_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 1);
-static SENSOR_DEVICE_ATTR(adc2_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 2);
-static SENSOR_DEVICE_ATTR(adc3_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 3);
-static SENSOR_DEVICE_ATTR(adc4_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 4);
-static SENSOR_DEVICE_ATTR(adc5_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 5);
-static SENSOR_DEVICE_ATTR(adc6_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 6);
-static SENSOR_DEVICE_ATTR(adc7_raw, S_IRUGO, s3c_hwmon_show_raw, NULL, 7);
-
-static struct attribute *s3c_hwmon_attrs[9] = {
-	&sensor_dev_attr_adc0_raw.dev_attr.attr,
-	&sensor_dev_attr_adc1_raw.dev_attr.attr,
-	&sensor_dev_attr_adc2_raw.dev_attr.attr,
-	&sensor_dev_attr_adc3_raw.dev_attr.attr,
-	&sensor_dev_attr_adc4_raw.dev_attr.attr,
-	&sensor_dev_attr_adc5_raw.dev_attr.attr,
-	&sensor_dev_attr_adc6_raw.dev_attr.attr,
-	&sensor_dev_attr_adc7_raw.dev_attr.attr,
-	NULL,
-};
-
-static struct attribute_group s3c_hwmon_attrgroup = {
-	.attrs	= s3c_hwmon_attrs,
-};
-
-static inline int s3c_hwmon_add_raw(struct device *dev)
-{
-	return sysfs_create_group(&dev->kobj, &s3c_hwmon_attrgroup);
-}
-
-static inline void s3c_hwmon_remove_raw(struct device *dev)
-{
-	sysfs_remove_group(&dev->kobj, &s3c_hwmon_attrgroup);
-}
-
-#else
-
-static inline int s3c_hwmon_add_raw(struct device *dev) { return 0; }
-static inline void s3c_hwmon_remove_raw(struct device *dev) { }
-
-#endif /* CONFIG_SENSORS_S3C_RAW */
-
-/**
- * s3c_hwmon_ch_show - show value of a given channel
- * @dev: The device that the attribute belongs to.
- * @attr: The attribute being read.
- * @buf: The result buffer.
- *
- * Read a value from the ADC and scale it before returning it to the
- * caller. The scale factor is gained from the channel configuration
- * passed via the platform data when the device was registered.
- */
-static ssize_t s3c_hwmon_ch_show(struct device *dev,
-				 struct device_attribute *attr,
-				 char *buf)
-{
-	struct sensor_device_attribute *sen_attr = to_sensor_dev_attr(attr);
-	struct s3c_hwmon *hwmon = dev_get_drvdata(dev);
-	struct s3c_hwmon_pdata *pdata = dev_get_platdata(dev);
-	struct s3c_hwmon_chcfg *cfg;
-	int ret;
-
-	cfg = pdata->in[sen_attr->index];
-
-	ret = s3c_hwmon_read_ch(dev, hwmon, sen_attr->index);
-	if (ret < 0)
-		return ret;
-
-	ret *= cfg->mult;
-	ret = DIV_ROUND_CLOSEST(ret, cfg->div);
-
-	return sysfs_emit(buf, "%d\n", ret);
-}
-
-/**
- * s3c_hwmon_label_show - show label name of the given channel.
- * @dev: The device that the attribute belongs to.
- * @attr: The attribute being read.
- * @buf: The result buffer.
- *
- * Return the label name of a given channel
- */
-static ssize_t s3c_hwmon_label_show(struct device *dev,
-				    struct device_attribute *attr,
-				    char *buf)
-{
-	struct sensor_device_attribute *sen_attr = to_sensor_dev_attr(attr);
-	struct s3c_hwmon_pdata *pdata = dev_get_platdata(dev);
-	struct s3c_hwmon_chcfg *cfg;
-
-	cfg = pdata->in[sen_attr->index];
-
-	return sysfs_emit(buf, "%s\n", cfg->name);
-}
-
-/**
- * s3c_hwmon_create_attr - create hwmon attribute for given channel.
- * @dev: The device to create the attribute on.
- * @cfg: The channel configuration passed from the platform data.
- * @channel: The ADC channel number to process.
- *
- * Create the scaled attribute for use with hwmon from the specified
- * platform data in @pdata. The sysfs entry is handled by the routine
- * s3c_hwmon_ch_show().
- *
- * The attribute name is taken from the configuration data if present
- * otherwise the name is taken by concatenating in_ with the channel
- * number.
- */
-static int s3c_hwmon_create_attr(struct device *dev,
-				 struct s3c_hwmon_chcfg *cfg,
-				 struct s3c_hwmon_attr *attrs,
-				 int channel)
-{
-	struct sensor_device_attribute *attr;
-	int ret;
-
-	snprintf(attrs->in_name, sizeof(attrs->in_name), "in%d_input", channel);
-
-	attr = &attrs->in;
-	attr->index = channel;
-	sysfs_attr_init(&attr->dev_attr.attr);
-	attr->dev_attr.attr.name  = attrs->in_name;
-	attr->dev_attr.attr.mode  = S_IRUGO;
-	attr->dev_attr.show = s3c_hwmon_ch_show;
-
-	ret =  device_create_file(dev, &attr->dev_attr);
-	if (ret < 0) {
-		dev_err(dev, "failed to create input attribute\n");
-		return ret;
-	}
-
-	/* if this has a name, add a label */
-	if (cfg->name) {
-		snprintf(attrs->label_name, sizeof(attrs->label_name),
-			 "in%d_label", channel);
-
-		attr = &attrs->label;
-		attr->index = channel;
-		sysfs_attr_init(&attr->dev_attr.attr);
-		attr->dev_attr.attr.name  = attrs->label_name;
-		attr->dev_attr.attr.mode  = S_IRUGO;
-		attr->dev_attr.show = s3c_hwmon_label_show;
-
-		ret = device_create_file(dev, &attr->dev_attr);
-		if (ret < 0) {
-			device_remove_file(dev, &attrs->in.dev_attr);
-			dev_err(dev, "failed to create label attribute\n");
-		}
-	}
-
-	return ret;
-}
-
-static void s3c_hwmon_remove_attr(struct device *dev,
-				  struct s3c_hwmon_attr *attrs)
-{
-	device_remove_file(dev, &attrs->in.dev_attr);
-	device_remove_file(dev, &attrs->label.dev_attr);
-}
-
-/**
- * s3c_hwmon_probe - device probe entry.
- * @dev: The device being probed.
-*/
-static int s3c_hwmon_probe(struct platform_device *dev)
-{
-	struct s3c_hwmon_pdata *pdata = dev_get_platdata(&dev->dev);
-	struct s3c_hwmon *hwmon;
-	int ret = 0;
-	int i;
-
-	if (!pdata) {
-		dev_err(&dev->dev, "no platform data supplied\n");
-		return -EINVAL;
-	}
-
-	hwmon = devm_kzalloc(&dev->dev, sizeof(struct s3c_hwmon), GFP_KERNEL);
-	if (hwmon == NULL)
-		return -ENOMEM;
-
-	platform_set_drvdata(dev, hwmon);
-
-	mutex_init(&hwmon->lock);
-
-	/* Register with the core ADC driver. */
-
-	hwmon->client = s3c_adc_register(dev, NULL, NULL, 0);
-	if (IS_ERR(hwmon->client)) {
-		dev_err(&dev->dev, "cannot register adc\n");
-		return PTR_ERR(hwmon->client);
-	}
-
-	/* add attributes for our adc devices. */
-
-	ret = s3c_hwmon_add_raw(&dev->dev);
-	if (ret)
-		goto err_registered;
-
-	/* register with the hwmon core */
-
-	hwmon->hwmon_dev = hwmon_device_register(&dev->dev);
-	if (IS_ERR(hwmon->hwmon_dev)) {
-		dev_err(&dev->dev, "error registering with hwmon\n");
-		ret = PTR_ERR(hwmon->hwmon_dev);
-		goto err_raw_attribute;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(pdata->in); i++) {
-		struct s3c_hwmon_chcfg *cfg = pdata->in[i];
-
-		if (!cfg)
-			continue;
-
-		if (cfg->mult >= 0x10000)
-			dev_warn(&dev->dev,
-				 "channel %d multiplier too large\n",
-				 i);
-
-		if (cfg->div == 0) {
-			dev_err(&dev->dev, "channel %d divider zero\n", i);
-			continue;
-		}
-
-		ret = s3c_hwmon_create_attr(&dev->dev, pdata->in[i],
-					    &hwmon->attrs[i], i);
-		if (ret) {
-			dev_err(&dev->dev,
-					"error creating channel %d\n", i);
-
-			for (i--; i >= 0; i--)
-				s3c_hwmon_remove_attr(&dev->dev,
-							      &hwmon->attrs[i]);
-
-			goto err_hwmon_register;
-		}
-	}
-
-	return 0;
-
- err_hwmon_register:
-	hwmon_device_unregister(hwmon->hwmon_dev);
-
- err_raw_attribute:
-	s3c_hwmon_remove_raw(&dev->dev);
-
- err_registered:
-	s3c_adc_release(hwmon->client);
-
-	return ret;
-}
-
-static int s3c_hwmon_remove(struct platform_device *dev)
-{
-	struct s3c_hwmon *hwmon = platform_get_drvdata(dev);
-	int i;
-
-	s3c_hwmon_remove_raw(&dev->dev);
-
-	for (i = 0; i < ARRAY_SIZE(hwmon->attrs); i++)
-		s3c_hwmon_remove_attr(&dev->dev, &hwmon->attrs[i]);
-
-	hwmon_device_unregister(hwmon->hwmon_dev);
-	s3c_adc_release(hwmon->client);
-
-	return 0;
-}
-
-static struct platform_driver s3c_hwmon_driver = {
-	.driver	= {
-		.name		= "s3c-hwmon",
-	},
-	.probe		= s3c_hwmon_probe,
-	.remove		= s3c_hwmon_remove,
-};
-
-module_platform_driver(s3c_hwmon_driver);
-
-MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
-MODULE_DESCRIPTION("S3C ADC HWMon driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:s3c-hwmon");