hwmon: (twl4030-madc) drop driver

This driver is no longer needed:

 * It has no mainline users
 * It has no DT support and OMAP is DT only
 * iio-hwmon can be used for madc, which also works with DT
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/Kconfig

@@ -1652,16 +1652,6 @@ config SENSORS_TMP421
 	  This driver can also be built as a module.  If so, the module
 	  will be called tmp421.
 
-config SENSORS_TWL4030_MADC
-	tristate "Texas Instruments TWL4030 MADC Hwmon"
-	depends on TWL4030_MADC
-	help
-	If you say yes here you get hwmon support for triton
-	TWL4030-MADC.
-
-	This driver can also be built as a module. If so it will be called
-	twl4030-madc-hwmon.
-
 config SENSORS_VEXPRESS
 	tristate "Versatile Express"
 	depends on VEXPRESS_CONFIG

drivers/hwmon/Makefile

@@ -158,7 +158,6 @@ obj-$(CONFIG_SENSORS_TMP103)	+= tmp103.o
 obj-$(CONFIG_SENSORS_TMP108)	+= tmp108.o
 obj-$(CONFIG_SENSORS_TMP401)	+= tmp401.o
 obj-$(CONFIG_SENSORS_TMP421)	+= tmp421.o
-obj-$(CONFIG_SENSORS_TWL4030_MADC)+= twl4030-madc-hwmon.o
 obj-$(CONFIG_SENSORS_VEXPRESS)	+= vexpress-hwmon.o
 obj-$(CONFIG_SENSORS_VIA_CPUTEMP)+= via-cputemp.o
 obj-$(CONFIG_SENSORS_VIA686A)	+= via686a.o

drivers/hwmon/twl4030-madc-hwmon.c

-/*
- *
- * TWL4030 MADC Hwmon driver-This driver monitors the real time
- * conversion of analog signals like battery temperature,
- * battery type, battery level etc. User can ask for the conversion on a
- * particular channel using the sysfs nodes.
- *
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
- * J Keerthy <j-keerthy@ti.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/i2c/twl.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/i2c/twl4030-madc.h>
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/stddef.h>
-#include <linux/sysfs.h>
-#include <linux/err.h>
-#include <linux/types.h>
-
-/*
- * sysfs hook function
- */
-static ssize_t madc_read(struct device *dev,
-			 struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct twl4030_madc_request req = {
-		.channels = 1 << attr->index,
-		.method = TWL4030_MADC_SW2,
-		.type = TWL4030_MADC_WAIT,
-	};
-	long val;
-
-	val = twl4030_madc_conversion(&req);
-	if (val < 0)
-		return val;
-
-	return sprintf(buf, "%d\n", req.rbuf[attr->index]);
-}
-
-/* sysfs nodes to read individual channels from user side */
-static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, madc_read, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, madc_read, NULL, 1);
-static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, madc_read, NULL, 2);
-static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, madc_read, NULL, 3);
-static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, madc_read, NULL, 4);
-static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, madc_read, NULL, 5);
-static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, madc_read, NULL, 6);
-static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, madc_read, NULL, 7);
-static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, madc_read, NULL, 8);
-static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, madc_read, NULL, 9);
-static SENSOR_DEVICE_ATTR(curr10_input, S_IRUGO, madc_read, NULL, 10);
-static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, madc_read, NULL, 11);
-static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, madc_read, NULL, 12);
-static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, madc_read, NULL, 15);
-
-static struct attribute *twl4030_madc_attrs[] = {
-	&sensor_dev_attr_in0_input.dev_attr.attr,
-	&sensor_dev_attr_temp1_input.dev_attr.attr,
-	&sensor_dev_attr_in2_input.dev_attr.attr,
-	&sensor_dev_attr_in3_input.dev_attr.attr,
-	&sensor_dev_attr_in4_input.dev_attr.attr,
-	&sensor_dev_attr_in5_input.dev_attr.attr,
-	&sensor_dev_attr_in6_input.dev_attr.attr,
-	&sensor_dev_attr_in7_input.dev_attr.attr,
-	&sensor_dev_attr_in8_input.dev_attr.attr,
-	&sensor_dev_attr_in9_input.dev_attr.attr,
-	&sensor_dev_attr_curr10_input.dev_attr.attr,
-	&sensor_dev_attr_in11_input.dev_attr.attr,
-	&sensor_dev_attr_in12_input.dev_attr.attr,
-	&sensor_dev_attr_in15_input.dev_attr.attr,
-	NULL
-};
-ATTRIBUTE_GROUPS(twl4030_madc);
-
-static int twl4030_madc_hwmon_probe(struct platform_device *pdev)
-{
-	struct device *hwmon;
-
-	hwmon = devm_hwmon_device_register_with_groups(&pdev->dev,
-						       "twl4030_madc", NULL,
-						       twl4030_madc_groups);
-	return PTR_ERR_OR_ZERO(hwmon);
-}
-
-static struct platform_driver twl4030_madc_hwmon_driver = {
-	.probe = twl4030_madc_hwmon_probe,
-	.driver = {
-		   .name = "twl4030_madc_hwmon",
-		   },
-};
-
-module_platform_driver(twl4030_madc_hwmon_driver);
-
-MODULE_DESCRIPTION("TWL4030 ADC Hwmon driver");
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("J Keerthy");
-MODULE_ALIAS("platform:twl4030_madc_hwmon");