[linux-2.6-block.git] / drivers / hwmon / mc13783-adc.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Driver for the ADC on Freescale Semiconductor MC13783 and MC13892 PMICs.
 *
 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
 * Copyright (C) 2009 Sascha Hauer, Pengutronix
 */

#include <linux/mfd/mc13xxx.h>
#include <linux/platform_device.h>
#include <linux/hwmon-sysfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/hwmon.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>

#define DRIVER_NAME	"mc13783-adc"

/* platform device id driver data */
#define MC13783_ADC_16CHANS	1
#define MC13783_ADC_BPDIV2	2

struct mc13783_adc_priv {
	struct mc13xxx *mc13xxx;
	struct device *hwmon_dev;
	char name[PLATFORM_NAME_SIZE];
};

static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
			 char *buf)
{
	struct mc13783_adc_priv *priv = dev_get_drvdata(dev);

	return sprintf(buf, "%s\n", priv->name);
}

static int mc13783_adc_read(struct device *dev,
		struct device_attribute *devattr, unsigned int *val)
{
	struct mc13783_adc_priv *priv = dev_get_drvdata(dev);
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	unsigned int channel = attr->index;
	unsigned int sample[4];
	int ret;

	ret = mc13xxx_adc_do_conversion(priv->mc13xxx,
			MC13XXX_ADC_MODE_MULT_CHAN,
			channel, 0, 0, sample);
	if (ret)
		return ret;

	/* ADIN7 subchannels */
	if (channel >= 16)
		channel = 7;

	channel &= 0x7;

	*val = (sample[channel % 4] >> (channel > 3 ? 14 : 2)) & 0x3ff;

	return 0;
}

static ssize_t mc13783_adc_bp_show(struct device *dev,
				   struct device_attribute *devattr,
				   char *buf)
{
	unsigned val;
	struct platform_device *pdev = to_platform_device(dev);
	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
	int ret = mc13783_adc_read(dev, devattr, &val);

	if (ret)
		return ret;

	if (driver_data & MC13783_ADC_BPDIV2)
		val = DIV_ROUND_CLOSEST(val * 9, 2);
	else
		/*
		 * BP (channel 2) reports with offset 2.4V to the actual value
		 * to fit the input range of the ADC.  unit = 2.25mV = 9/4 mV.
		 */
		val = DIV_ROUND_CLOSEST(val * 9, 4) + 2400;

	return sprintf(buf, "%u\n", val);
}

static ssize_t mc13783_adc_gp_show(struct device *dev,
				   struct device_attribute *devattr,
				   char *buf)
{
	unsigned val;
	int ret = mc13783_adc_read(dev, devattr, &val);

	if (ret)
		return ret;

	/*
	 * input range is [0, 2.3V], val has 10 bits, so each bit
	 * is worth 9/4 mV.
	 */
	val = DIV_ROUND_CLOSEST(val * 9, 4);

	return sprintf(buf, "%u\n", val);
}

static ssize_t mc13783_adc_uid_show(struct device *dev,
				    struct device_attribute *devattr,
				    char *buf)
{
	unsigned int val;
	struct platform_device *pdev = to_platform_device(dev);
	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
	int ret = mc13783_adc_read(dev, devattr, &val);

	if (ret)
		return ret;

	if (driver_data & MC13783_ADC_BPDIV2)
		/* MC13892 have 1/2 divider, input range is [0, 4.800V] */
		val = DIV_ROUND_CLOSEST(val * 4800, 1024);
	else
		/* MC13783 have 0.9 divider, input range is [0, 2.555V] */
		val = DIV_ROUND_CLOSEST(val * 2555, 1024);

	return sprintf(buf, "%u\n", val);
}

static ssize_t mc13783_adc_temp_show(struct device *dev,
				     struct device_attribute *devattr,
				     char *buf)
{
	unsigned int val;
	struct platform_device *pdev = to_platform_device(dev);
	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
	int ret = mc13783_adc_read(dev, devattr, &val);

	if (ret)
		return ret;

	if (driver_data & MC13783_ADC_BPDIV2) {
		/*
		 * MC13892:
		 * Die Temperature Read Out Code at 25C 680
		 * Temperature change per LSB +0.4244C
		 */
		ret = DIV_ROUND_CLOSEST(-2635920 + val * 4244, 10);
	} else {
		/*
		 * MC13783:
		 * Die Temperature Read Out Code at 25C 282
		 * Temperature change per LSB -1.14C
		 */
		ret = 346480 - 1140 * val;
	}

	return sprintf(buf, "%d\n", ret);
}

static DEVICE_ATTR_RO(name);
static SENSOR_DEVICE_ATTR_RO(in2_input, mc13783_adc_bp, 2);
static SENSOR_DEVICE_ATTR_RO(in5_input, mc13783_adc_gp, 5);
static SENSOR_DEVICE_ATTR_RO(in6_input, mc13783_adc_gp, 6);
static SENSOR_DEVICE_ATTR_RO(in7_input, mc13783_adc_gp, 7);
static SENSOR_DEVICE_ATTR_RO(in8_input, mc13783_adc_gp, 8);
static SENSOR_DEVICE_ATTR_RO(in9_input, mc13783_adc_gp, 9);
static SENSOR_DEVICE_ATTR_RO(in10_input, mc13783_adc_gp, 10);
static SENSOR_DEVICE_ATTR_RO(in11_input, mc13783_adc_gp, 11);
static SENSOR_DEVICE_ATTR_RO(in12_input, mc13783_adc_gp, 12);
static SENSOR_DEVICE_ATTR_RO(in13_input, mc13783_adc_gp, 13);
static SENSOR_DEVICE_ATTR_RO(in14_input, mc13783_adc_gp, 14);
static SENSOR_DEVICE_ATTR_RO(in15_input, mc13783_adc_gp, 15);
static SENSOR_DEVICE_ATTR_RO(in16_input, mc13783_adc_uid, 16);
static SENSOR_DEVICE_ATTR_RO(temp1_input, mc13783_adc_temp, 17);

static struct attribute *mc13783_attr_base[] = {
	&dev_attr_name.attr,
	&sensor_dev_attr_in2_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_in16_input.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	NULL
};

static const struct attribute_group mc13783_group_base = {
	.attrs = mc13783_attr_base,
};

/* these are only used if MC13783_ADC_16CHANS is provided in driver data */
static struct attribute *mc13783_attr_16chans[] = {
	&sensor_dev_attr_in8_input.dev_attr.attr,
	&sensor_dev_attr_in9_input.dev_attr.attr,
	&sensor_dev_attr_in10_input.dev_attr.attr,
	&sensor_dev_attr_in11_input.dev_attr.attr,
	NULL
};

static const struct attribute_group mc13783_group_16chans = {
	.attrs = mc13783_attr_16chans,
};

/* last four channels may be occupied by the touchscreen */
static struct attribute *mc13783_attr_ts[] = {
	&sensor_dev_attr_in12_input.dev_attr.attr,
	&sensor_dev_attr_in13_input.dev_attr.attr,
	&sensor_dev_attr_in14_input.dev_attr.attr,
	&sensor_dev_attr_in15_input.dev_attr.attr,
	NULL
};

static const struct attribute_group mc13783_group_ts = {
	.attrs = mc13783_attr_ts,
};

static int mc13783_adc_use_touchscreen(struct platform_device *pdev)
{
	struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
	unsigned flags = mc13xxx_get_flags(priv->mc13xxx);

	return flags & MC13XXX_USE_TOUCHSCREEN;
}

static int __init mc13783_adc_probe(struct platform_device *pdev)
{
	struct mc13783_adc_priv *priv;
	int ret;
	const struct platform_device_id *id = platform_get_device_id(pdev);
	char *dash;

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->mc13xxx = dev_get_drvdata(pdev->dev.parent);
	snprintf(priv->name, ARRAY_SIZE(priv->name), "%s", id->name);
	dash = strchr(priv->name, '-');
	if (dash)
		*dash = '\0';

	platform_set_drvdata(pdev, priv);

	/* Register sysfs hooks */
	ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_base);
	if (ret)
		return ret;

	if (id->driver_data & MC13783_ADC_16CHANS) {
		ret = sysfs_create_group(&pdev->dev.kobj,
				&mc13783_group_16chans);
		if (ret)
			goto out_err_create_16chans;
	}

	if (!mc13783_adc_use_touchscreen(pdev)) {
		ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_ts);
		if (ret)
			goto out_err_create_ts;
	}

	priv->hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(priv->hwmon_dev)) {
		ret = PTR_ERR(priv->hwmon_dev);
		dev_err(&pdev->dev,
				"hwmon_device_register failed with %d.\n", ret);
		goto out_err_register;
	}

	return 0;

out_err_register:

	if (!mc13783_adc_use_touchscreen(pdev))
		sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);
out_err_create_ts:

	if (id->driver_data & MC13783_ADC_16CHANS)
		sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans);
out_err_create_16chans:

	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base);
	return ret;
}

static int mc13783_adc_remove(struct platform_device *pdev)
{
	struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;

	hwmon_device_unregister(priv->hwmon_dev);

	if (!mc13783_adc_use_touchscreen(pdev))
		sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);

	if (driver_data & MC13783_ADC_16CHANS)
		sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans);

	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base);

	return 0;
}

static const struct platform_device_id mc13783_adc_idtable[] = {
	{
		.name = "mc13783-adc",
		.driver_data = MC13783_ADC_16CHANS,
	}, {
		.name = "mc13892-adc",
		.driver_data = MC13783_ADC_BPDIV2,
	}, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(platform, mc13783_adc_idtable);

static struct platform_driver mc13783_adc_driver = {
	.remove		= mc13783_adc_remove,
	.driver		= {
		.name	= DRIVER_NAME,
	},
	.id_table	= mc13783_adc_idtable,
};

module_platform_driver_probe(mc13783_adc_driver, mc13783_adc_probe);

MODULE_DESCRIPTION("MC13783 ADC driver");
MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
MODULE_LICENSE("GPL");
Commit	Line	Data
9450f52c	1	// SPDX-License-Identifier: GPL-2.0+
93ee0a75	2	/*
0c273215	3	* Driver for the ADC on Freescale Semiconductor MC13783 and MC13892 PMICs.
93ee0a75 LF	4	*
	5	* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
	6	* Copyright (C) 2009 Sascha Hauer, Pengutronix
93ee0a75 LF	7	*/
93ee0a75 LF	8
0c273215	9	#include <linux/mfd/mc13xxx.h>
93ee0a75 LF	10	#include <linux/platform_device.h>
	11	#include <linux/hwmon-sysfs.h>
	12	#include <linux/kernel.h>
	13	#include <linux/module.h>
ac316725	14	#include <linux/mod_devicetable.h>
93ee0a75	15	#include <linux/hwmon.h>
5a0e3ad6	16	#include <linux/slab.h>
93ee0a75 LF	17	#include <linux/init.h>
	18	#include <linux/err.h>
	19
0c273215 UKK	20	#define DRIVER_NAME "mc13783-adc"
	21
	22	/* platform device id driver data */
	23	#define MC13783_ADC_16CHANS 1
	24	#define MC13783_ADC_BPDIV2 2
93ee0a75 LF	25
93ee0a75 LF	26	struct mc13783_adc_priv {
613c27ab	27	struct mc13xxx *mc13xxx;
93ee0a75	28	struct device *hwmon_dev;
ae02e741	29	char name[PLATFORM_NAME_SIZE];
93ee0a75 LF	30	};
93ee0a75 LF	31
918b4056 JL	32	static ssize_t name_show(struct device dev, struct device_attribute devattr,
918b4056 JL	33	char *buf)
93ee0a75	34	{
0c273215 UKK	35	struct mc13783_adc_priv *priv = dev_get_drvdata(dev);
	36
	37	return sprintf(buf, "%s\n", priv->name);
93ee0a75 LF	38	}
	39
	40	static int mc13783_adc_read(struct device *dev,
	41	struct device_attribute devattr, unsigned int val)
	42	{
0c273215	43	struct mc13783_adc_priv *priv = dev_get_drvdata(dev);
93ee0a75 LF	44	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	45	unsigned int channel = attr->index;
	46	unsigned int sample[4];
	47	int ret;
	48
613c27ab UKK	49	ret = mc13xxx_adc_do_conversion(priv->mc13xxx,
613c27ab UKK	50	MC13XXX_ADC_MODE_MULT_CHAN,
1039d762	51	channel, 0, 0, sample);
93ee0a75 LF	52	if (ret)
	53	return ret;
	54
ed645ccc AG	55	/* ADIN7 subchannels */
	56	if (channel >= 16)
	57	channel = 7;
	58
93ee0a75 LF	59	channel &= 0x7;
	60
	61	*val = (sample[channel % 4] >> (channel > 3 ? 14 : 2)) & 0x3ff;
	62
	63	return 0;
	64	}
	65
6d190949 GR	66	static ssize_t mc13783_adc_bp_show(struct device *dev,
	67	struct device_attribute *devattr,
	68	char *buf)
93ee0a75 LF	69	{
93ee0a75 LF	70	unsigned val;
0c273215 UKK	71	struct platform_device *pdev = to_platform_device(dev);
0c273215 UKK	72	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
93ee0a75 LF	73	int ret = mc13783_adc_read(dev, devattr, &val);
	74
	75	if (ret)
	76	return ret;
	77
0c273215 UKK	78	if (driver_data & MC13783_ADC_BPDIV2)
	79	val = DIV_ROUND_CLOSEST(val * 9, 2);
	80	else
	81	/*
	82	* BP (channel 2) reports with offset 2.4V to the actual value
	83	* to fit the input range of the ADC. unit = 2.25mV = 9/4 mV.
	84	*/
	85	val = DIV_ROUND_CLOSEST(val * 9, 4) + 2400;
93ee0a75 LF	86
	87	return sprintf(buf, "%u\n", val);
	88	}
	89
6d190949 GR	90	static ssize_t mc13783_adc_gp_show(struct device *dev,
	91	struct device_attribute *devattr,
	92	char *buf)
93ee0a75 LF	93	{
	94	unsigned val;
	95	int ret = mc13783_adc_read(dev, devattr, &val);
	96
	97	if (ret)
	98	return ret;
	99
	100	/*
	101	* input range is [0, 2.3V], val has 10 bits, so each bit
	102	* is worth 9/4 mV.
	103	*/
	104	val = DIV_ROUND_CLOSEST(val * 9, 4);
	105
	106	return sprintf(buf, "%u\n", val);
	107	}
	108
6d190949 GR	109	static ssize_t mc13783_adc_uid_show(struct device *dev,
	110	struct device_attribute *devattr,
	111	char *buf)
ed645ccc AG	112	{
	113	unsigned int val;
	114	struct platform_device *pdev = to_platform_device(dev);
	115	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
	116	int ret = mc13783_adc_read(dev, devattr, &val);
	117
	118	if (ret)
	119	return ret;
	120
	121	if (driver_data & MC13783_ADC_BPDIV2)
	122	/* MC13892 have 1/2 divider, input range is [0, 4.800V] */
	123	val = DIV_ROUND_CLOSEST(val * 4800, 1024);
	124	else
	125	/* MC13783 have 0.9 divider, input range is [0, 2.555V] */
	126	val = DIV_ROUND_CLOSEST(val * 2555, 1024);
	127
	128	return sprintf(buf, "%u\n", val);
	129	}
	130
6d190949 GR	131	static ssize_t mc13783_adc_temp_show(struct device *dev,
	132	struct device_attribute *devattr,
	133	char *buf)
ed645ccc AG	134	{
	135	unsigned int val;
	136	struct platform_device *pdev = to_platform_device(dev);
	137	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
	138	int ret = mc13783_adc_read(dev, devattr, &val);
	139
	140	if (ret)
	141	return ret;
	142
	143	if (driver_data & MC13783_ADC_BPDIV2) {
	144	/*
	145	* MC13892:
	146	* Die Temperature Read Out Code at 25C 680
	147	* Temperature change per LSB +0.4244C
	148	*/
	149	ret = DIV_ROUND_CLOSEST(-2635920 + val * 4244, 10);
	150	} else {
	151	/*
	152	* MC13783:
	153	* Die Temperature Read Out Code at 25C 282
	154	* Temperature change per LSB -1.14C
	155	*/
	156	ret = 346480 - 1140 * val;
	157	}
	158
	159	return sprintf(buf, "%d\n", ret);
	160	}
	161
918b4056	162	static DEVICE_ATTR_RO(name);
6d190949 GR	163	static SENSOR_DEVICE_ATTR_RO(in2_input, mc13783_adc_bp, 2);
	164	static SENSOR_DEVICE_ATTR_RO(in5_input, mc13783_adc_gp, 5);
	165	static SENSOR_DEVICE_ATTR_RO(in6_input, mc13783_adc_gp, 6);
	166	static SENSOR_DEVICE_ATTR_RO(in7_input, mc13783_adc_gp, 7);
	167	static SENSOR_DEVICE_ATTR_RO(in8_input, mc13783_adc_gp, 8);
	168	static SENSOR_DEVICE_ATTR_RO(in9_input, mc13783_adc_gp, 9);
	169	static SENSOR_DEVICE_ATTR_RO(in10_input, mc13783_adc_gp, 10);
	170	static SENSOR_DEVICE_ATTR_RO(in11_input, mc13783_adc_gp, 11);
	171	static SENSOR_DEVICE_ATTR_RO(in12_input, mc13783_adc_gp, 12);
	172	static SENSOR_DEVICE_ATTR_RO(in13_input, mc13783_adc_gp, 13);
	173	static SENSOR_DEVICE_ATTR_RO(in14_input, mc13783_adc_gp, 14);
	174	static SENSOR_DEVICE_ATTR_RO(in15_input, mc13783_adc_gp, 15);
	175	static SENSOR_DEVICE_ATTR_RO(in16_input, mc13783_adc_uid, 16);
	176	static SENSOR_DEVICE_ATTR_RO(temp1_input, mc13783_adc_temp, 17);
93ee0a75	177
0c273215	178	static struct attribute *mc13783_attr_base[] = {
93ee0a75 LF	179	&dev_attr_name.attr,
	180	&sensor_dev_attr_in2_input.dev_attr.attr,
	181	&sensor_dev_attr_in5_input.dev_attr.attr,
	182	&sensor_dev_attr_in6_input.dev_attr.attr,
	183	&sensor_dev_attr_in7_input.dev_attr.attr,
ed645ccc AG	184	&sensor_dev_attr_in16_input.dev_attr.attr,
ed645ccc AG	185	&sensor_dev_attr_temp1_input.dev_attr.attr,
0c273215 UKK	186	NULL
	187	};
	188
	189	static const struct attribute_group mc13783_group_base = {
	190	.attrs = mc13783_attr_base,
	191	};
	192
	193	/* these are only used if MC13783_ADC_16CHANS is provided in driver data */
	194	static struct attribute *mc13783_attr_16chans[] = {
93ee0a75 LF	195	&sensor_dev_attr_in8_input.dev_attr.attr,
	196	&sensor_dev_attr_in9_input.dev_attr.attr,
	197	&sensor_dev_attr_in10_input.dev_attr.attr,
	198	&sensor_dev_attr_in11_input.dev_attr.attr,
	199	NULL
	200	};
	201
0c273215 UKK	202	static const struct attribute_group mc13783_group_16chans = {
0c273215 UKK	203	.attrs = mc13783_attr_16chans,
93ee0a75 LF	204	};
	205
	206	/* last four channels may be occupied by the touchscreen */
	207	static struct attribute *mc13783_attr_ts[] = {
	208	&sensor_dev_attr_in12_input.dev_attr.attr,
	209	&sensor_dev_attr_in13_input.dev_attr.attr,
	210	&sensor_dev_attr_in14_input.dev_attr.attr,
	211	&sensor_dev_attr_in15_input.dev_attr.attr,
	212	NULL
	213	};
	214
	215	static const struct attribute_group mc13783_group_ts = {
	216	.attrs = mc13783_attr_ts,
	217	};
	218
eaf06ee2 UKK	219	static int mc13783_adc_use_touchscreen(struct platform_device *pdev)
	220	{
	221	struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
613c27ab	222	unsigned flags = mc13xxx_get_flags(priv->mc13xxx);
eaf06ee2	223
613c27ab	224	return flags & MC13XXX_USE_TOUCHSCREEN;
eaf06ee2 UKK	225	}
eaf06ee2 UKK	226
93ee0a75 LF	227	static int __init mc13783_adc_probe(struct platform_device *pdev)
	228	{
	229	struct mc13783_adc_priv *priv;
	230	int ret;
0c273215 UKK	231	const struct platform_device_id *id = platform_get_device_id(pdev);
0c273215 UKK	232	char *dash;
93ee0a75	233
ed2e073b	234	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
93ee0a75 LF	235	if (!priv)
	236	return -ENOMEM;
	237
613c27ab	238	priv->mc13xxx = dev_get_drvdata(pdev->dev.parent);
0c273215 UKK	239	snprintf(priv->name, ARRAY_SIZE(priv->name), "%s", id->name);
	240	dash = strchr(priv->name, '-');
	241	if (dash)
	242	*dash = '\0';
93ee0a75 LF	243
	244	platform_set_drvdata(pdev, priv);
	245
	246	/* Register sysfs hooks */
0c273215	247	ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_base);
93ee0a75	248	if (ret)
ed2e073b	249	return ret;
0c273215 UKK	250
	251	if (id->driver_data & MC13783_ADC_16CHANS) {
	252	ret = sysfs_create_group(&pdev->dev.kobj,
	253	&mc13783_group_16chans);
	254	if (ret)
	255	goto out_err_create_16chans;
	256	}
93ee0a75	257
eaf06ee2	258	if (!mc13783_adc_use_touchscreen(pdev)) {
93ee0a75 LF	259	ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_ts);
93ee0a75 LF	260	if (ret)
0c273215	261	goto out_err_create_ts;
eaf06ee2	262	}
93ee0a75 LF	263
	264	priv->hwmon_dev = hwmon_device_register(&pdev->dev);
	265	if (IS_ERR(priv->hwmon_dev)) {
	266	ret = PTR_ERR(priv->hwmon_dev);
	267	dev_err(&pdev->dev,
	268	"hwmon_device_register failed with %d.\n", ret);
	269	goto out_err_register;
	270	}
	271
93ee0a75 LF	272	return 0;
	273
	274	out_err_register:
	275
eaf06ee2	276	if (!mc13783_adc_use_touchscreen(pdev))
93ee0a75	277	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);
0c273215	278	out_err_create_ts:
93ee0a75	279
0c273215 UKK	280	if (id->driver_data & MC13783_ADC_16CHANS)
	281	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans);
	282	out_err_create_16chans:
	283
	284	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base);
93ee0a75 LF	285	return ret;
	286	}
	287
281dfd0b	288	static int mc13783_adc_remove(struct platform_device *pdev)
93ee0a75 LF	289	{
93ee0a75 LF	290	struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
0c273215	291	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
93ee0a75 LF	292
	293	hwmon_device_unregister(priv->hwmon_dev);
	294
eaf06ee2	295	if (!mc13783_adc_use_touchscreen(pdev))
93ee0a75 LF	296	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);
93ee0a75 LF	297
0c273215 UKK	298	if (driver_data & MC13783_ADC_16CHANS)
	299	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans);
	300
	301	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base);
93ee0a75	302
93ee0a75 LF	303	return 0;
	304	}
	305
0c273215 UKK	306	static const struct platform_device_id mc13783_adc_idtable[] = {
	307	{
	308	.name = "mc13783-adc",
	309	.driver_data = MC13783_ADC_16CHANS,
	310	}, {
	311	.name = "mc13892-adc",
	312	.driver_data = MC13783_ADC_BPDIV2,
	313	}, {
	314	/* sentinel */
	315	}
	316	};
	317	MODULE_DEVICE_TABLE(platform, mc13783_adc_idtable);
	318
93ee0a75	319	static struct platform_driver mc13783_adc_driver = {
9e5e9b7a	320	.remove = mc13783_adc_remove,
93ee0a75	321	.driver = {
0c273215	322	.name = DRIVER_NAME,
93ee0a75	323	},
0c273215	324	.id_table = mc13783_adc_idtable,
93ee0a75 LF	325	};
93ee0a75 LF	326
f40fb63e	327	module_platform_driver_probe(mc13783_adc_driver, mc13783_adc_probe);
93ee0a75 LF	328
	329	MODULE_DESCRIPTION("MC13783 ADC driver");
	330	MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
	331	MODULE_LICENSE("GPL");