[mirror_ubuntu-hirsute-kernel.git] / drivers / hwmon / mc13783-adc.c

/*
 * 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
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 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/mfd/mc13xxx.h>
#include <linux/platform_device.h>
#include <linux/hwmon-sysfs.h>
#include <linux/kernel.h>
#include <linux/module.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_read_bp(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_read_gp(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_read_uid(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_read_temp(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(in2_input, S_IRUGO, mc13783_adc_read_bp, NULL, 2);
static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, mc13783_adc_read_gp, NULL, 5);
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, mc13783_adc_read_gp, NULL, 6);
static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, mc13783_adc_read_gp, NULL, 7);
static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, mc13783_adc_read_gp, NULL, 8);
static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, mc13783_adc_read_gp, NULL, 9);
static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, mc13783_adc_read_gp, NULL, 10);
static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, mc13783_adc_read_gp, NULL, 11);
static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, mc13783_adc_read_gp, NULL, 12);
static SENSOR_DEVICE_ATTR(in13_input, S_IRUGO, mc13783_adc_read_gp, NULL, 13);
static SENSOR_DEVICE_ATTR(in14_input, S_IRUGO, mc13783_adc_read_gp, NULL, 14);
static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, mc13783_adc_read_gp, NULL, 15);
static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, mc13783_adc_read_uid, NULL, 16);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
			  mc13783_adc_read_temp, NULL, 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
93ee0a75	1	/*
0c273215	2	* Driver for the ADC on Freescale Semiconductor MC13783 and MC13892 PMICs.
93ee0a75 LF	3	*
	4	* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
	5	* Copyright (C) 2009 Sascha Hauer, Pengutronix
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version 2
	10	* of the License, or (at your option) any later version.
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program; if not, write to the Free Software Foundation, Inc., 51
	18	* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
0c273215	21	#include <linux/mfd/mc13xxx.h>
93ee0a75 LF	22	#include <linux/platform_device.h>
	23	#include <linux/hwmon-sysfs.h>
	24	#include <linux/kernel.h>
	25	#include <linux/module.h>
	26	#include <linux/hwmon.h>
5a0e3ad6	27	#include <linux/slab.h>
93ee0a75 LF	28	#include <linux/init.h>
	29	#include <linux/err.h>
	30
0c273215 UKK	31	#define DRIVER_NAME "mc13783-adc"
	32
	33	/* platform device id driver data */
	34	#define MC13783_ADC_16CHANS 1
	35	#define MC13783_ADC_BPDIV2 2
93ee0a75 LF	36
93ee0a75 LF	37	struct mc13783_adc_priv {
613c27ab	38	struct mc13xxx *mc13xxx;
93ee0a75	39	struct device *hwmon_dev;
ae02e741	40	char name[PLATFORM_NAME_SIZE];
93ee0a75 LF	41	};
93ee0a75 LF	42
918b4056 JL	43	static ssize_t name_show(struct device dev, struct device_attribute devattr,
918b4056 JL	44	char *buf)
93ee0a75	45	{
0c273215 UKK	46	struct mc13783_adc_priv *priv = dev_get_drvdata(dev);
	47
	48	return sprintf(buf, "%s\n", priv->name);
93ee0a75 LF	49	}
	50
	51	static int mc13783_adc_read(struct device *dev,
	52	struct device_attribute devattr, unsigned int val)
	53	{
0c273215	54	struct mc13783_adc_priv *priv = dev_get_drvdata(dev);
93ee0a75 LF	55	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	56	unsigned int channel = attr->index;
	57	unsigned int sample[4];
	58	int ret;
	59
613c27ab UKK	60	ret = mc13xxx_adc_do_conversion(priv->mc13xxx,
613c27ab UKK	61	MC13XXX_ADC_MODE_MULT_CHAN,
1039d762	62	channel, 0, 0, sample);
93ee0a75 LF	63	if (ret)
	64	return ret;
	65
ed645ccc AG	66	/* ADIN7 subchannels */
	67	if (channel >= 16)
	68	channel = 7;
	69
93ee0a75 LF	70	channel &= 0x7;
	71
	72	*val = (sample[channel % 4] >> (channel > 3 ? 14 : 2)) & 0x3ff;
	73
	74	return 0;
	75	}
	76
	77	static ssize_t mc13783_adc_read_bp(struct device *dev,
	78	struct device_attribute devattr, char buf)
	79	{
	80	unsigned val;
0c273215 UKK	81	struct platform_device *pdev = to_platform_device(dev);
0c273215 UKK	82	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
93ee0a75 LF	83	int ret = mc13783_adc_read(dev, devattr, &val);
	84
	85	if (ret)
	86	return ret;
	87
0c273215 UKK	88	if (driver_data & MC13783_ADC_BPDIV2)
	89	val = DIV_ROUND_CLOSEST(val * 9, 2);
	90	else
	91	/*
	92	* BP (channel 2) reports with offset 2.4V to the actual value
	93	* to fit the input range of the ADC. unit = 2.25mV = 9/4 mV.
	94	*/
	95	val = DIV_ROUND_CLOSEST(val * 9, 4) + 2400;
93ee0a75 LF	96
	97	return sprintf(buf, "%u\n", val);
	98	}
	99
	100	static ssize_t mc13783_adc_read_gp(struct device *dev,
	101	struct device_attribute devattr, char buf)
	102	{
	103	unsigned val;
	104	int ret = mc13783_adc_read(dev, devattr, &val);
	105
	106	if (ret)
	107	return ret;
	108
	109	/*
	110	* input range is [0, 2.3V], val has 10 bits, so each bit
	111	* is worth 9/4 mV.
	112	*/
	113	val = DIV_ROUND_CLOSEST(val * 9, 4);
	114
	115	return sprintf(buf, "%u\n", val);
	116	}
	117
ed645ccc AG	118	static ssize_t mc13783_adc_read_uid(struct device *dev,
	119	struct device_attribute devattr, char buf)
	120	{
	121	unsigned int val;
	122	struct platform_device *pdev = to_platform_device(dev);
	123	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
	124	int ret = mc13783_adc_read(dev, devattr, &val);
	125
	126	if (ret)
	127	return ret;
	128
	129	if (driver_data & MC13783_ADC_BPDIV2)
	130	/* MC13892 have 1/2 divider, input range is [0, 4.800V] */
	131	val = DIV_ROUND_CLOSEST(val * 4800, 1024);
	132	else
	133	/* MC13783 have 0.9 divider, input range is [0, 2.555V] */
	134	val = DIV_ROUND_CLOSEST(val * 2555, 1024);
	135
	136	return sprintf(buf, "%u\n", val);
	137	}
	138
	139	static ssize_t mc13783_adc_read_temp(struct device *dev,
	140	struct device_attribute devattr, char buf)
	141	{
	142	unsigned int val;
	143	struct platform_device *pdev = to_platform_device(dev);
	144	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
	145	int ret = mc13783_adc_read(dev, devattr, &val);
	146
	147	if (ret)
	148	return ret;
	149
	150	if (driver_data & MC13783_ADC_BPDIV2) {
	151	/*
	152	* MC13892:
	153	* Die Temperature Read Out Code at 25C 680
	154	* Temperature change per LSB +0.4244C
	155	*/
	156	ret = DIV_ROUND_CLOSEST(-2635920 + val * 4244, 10);
	157	} else {
	158	/*
	159	* MC13783:
	160	* Die Temperature Read Out Code at 25C 282
	161	* Temperature change per LSB -1.14C
	162	*/
	163	ret = 346480 - 1140 * val;
	164	}
	165
	166	return sprintf(buf, "%d\n", ret);
	167	}
	168
918b4056	169	static DEVICE_ATTR_RO(name);
93ee0a75 LF	170	static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, mc13783_adc_read_bp, NULL, 2);
	171	static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, mc13783_adc_read_gp, NULL, 5);
	172	static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, mc13783_adc_read_gp, NULL, 6);
	173	static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, mc13783_adc_read_gp, NULL, 7);
	174	static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, mc13783_adc_read_gp, NULL, 8);
	175	static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, mc13783_adc_read_gp, NULL, 9);
	176	static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, mc13783_adc_read_gp, NULL, 10);
	177	static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, mc13783_adc_read_gp, NULL, 11);
	178	static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, mc13783_adc_read_gp, NULL, 12);
	179	static SENSOR_DEVICE_ATTR(in13_input, S_IRUGO, mc13783_adc_read_gp, NULL, 13);
	180	static SENSOR_DEVICE_ATTR(in14_input, S_IRUGO, mc13783_adc_read_gp, NULL, 14);
	181	static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, mc13783_adc_read_gp, NULL, 15);
ed645ccc AG	182	static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, mc13783_adc_read_uid, NULL, 16);
	183	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
	184	mc13783_adc_read_temp, NULL, 17);
93ee0a75	185
0c273215	186	static struct attribute *mc13783_attr_base[] = {
93ee0a75 LF	187	&dev_attr_name.attr,
	188	&sensor_dev_attr_in2_input.dev_attr.attr,
	189	&sensor_dev_attr_in5_input.dev_attr.attr,
	190	&sensor_dev_attr_in6_input.dev_attr.attr,
	191	&sensor_dev_attr_in7_input.dev_attr.attr,
ed645ccc AG	192	&sensor_dev_attr_in16_input.dev_attr.attr,
ed645ccc AG	193	&sensor_dev_attr_temp1_input.dev_attr.attr,
0c273215 UKK	194	NULL
	195	};
	196
	197	static const struct attribute_group mc13783_group_base = {
	198	.attrs = mc13783_attr_base,
	199	};
	200
	201	/* these are only used if MC13783_ADC_16CHANS is provided in driver data */
	202	static struct attribute *mc13783_attr_16chans[] = {
93ee0a75 LF	203	&sensor_dev_attr_in8_input.dev_attr.attr,
	204	&sensor_dev_attr_in9_input.dev_attr.attr,
	205	&sensor_dev_attr_in10_input.dev_attr.attr,
	206	&sensor_dev_attr_in11_input.dev_attr.attr,
	207	NULL
	208	};
	209
0c273215 UKK	210	static const struct attribute_group mc13783_group_16chans = {
0c273215 UKK	211	.attrs = mc13783_attr_16chans,
93ee0a75 LF	212	};
	213
	214	/* last four channels may be occupied by the touchscreen */
	215	static struct attribute *mc13783_attr_ts[] = {
	216	&sensor_dev_attr_in12_input.dev_attr.attr,
	217	&sensor_dev_attr_in13_input.dev_attr.attr,
	218	&sensor_dev_attr_in14_input.dev_attr.attr,
	219	&sensor_dev_attr_in15_input.dev_attr.attr,
	220	NULL
	221	};
	222
	223	static const struct attribute_group mc13783_group_ts = {
	224	.attrs = mc13783_attr_ts,
	225	};
	226
eaf06ee2 UKK	227	static int mc13783_adc_use_touchscreen(struct platform_device *pdev)
	228	{
	229	struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
613c27ab	230	unsigned flags = mc13xxx_get_flags(priv->mc13xxx);
eaf06ee2	231
613c27ab	232	return flags & MC13XXX_USE_TOUCHSCREEN;
eaf06ee2 UKK	233	}
eaf06ee2 UKK	234
93ee0a75 LF	235	static int __init mc13783_adc_probe(struct platform_device *pdev)
	236	{
	237	struct mc13783_adc_priv *priv;
	238	int ret;
0c273215 UKK	239	const struct platform_device_id *id = platform_get_device_id(pdev);
0c273215 UKK	240	char *dash;
93ee0a75	241
ed2e073b	242	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
93ee0a75 LF	243	if (!priv)
	244	return -ENOMEM;
	245
613c27ab	246	priv->mc13xxx = dev_get_drvdata(pdev->dev.parent);
0c273215 UKK	247	snprintf(priv->name, ARRAY_SIZE(priv->name), "%s", id->name);
	248	dash = strchr(priv->name, '-');
	249	if (dash)
	250	*dash = '\0';
93ee0a75 LF	251
	252	platform_set_drvdata(pdev, priv);
	253
	254	/* Register sysfs hooks */
0c273215	255	ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_base);
93ee0a75	256	if (ret)
ed2e073b	257	return ret;
0c273215 UKK	258
	259	if (id->driver_data & MC13783_ADC_16CHANS) {
	260	ret = sysfs_create_group(&pdev->dev.kobj,
	261	&mc13783_group_16chans);
	262	if (ret)
	263	goto out_err_create_16chans;
	264	}
93ee0a75	265
eaf06ee2	266	if (!mc13783_adc_use_touchscreen(pdev)) {
93ee0a75 LF	267	ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_ts);
93ee0a75 LF	268	if (ret)
0c273215	269	goto out_err_create_ts;
eaf06ee2	270	}
93ee0a75 LF	271
	272	priv->hwmon_dev = hwmon_device_register(&pdev->dev);
	273	if (IS_ERR(priv->hwmon_dev)) {
	274	ret = PTR_ERR(priv->hwmon_dev);
	275	dev_err(&pdev->dev,
	276	"hwmon_device_register failed with %d.\n", ret);
	277	goto out_err_register;
	278	}
	279
93ee0a75 LF	280	return 0;
	281
	282	out_err_register:
	283
eaf06ee2	284	if (!mc13783_adc_use_touchscreen(pdev))
93ee0a75	285	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);
0c273215	286	out_err_create_ts:
93ee0a75	287
0c273215 UKK	288	if (id->driver_data & MC13783_ADC_16CHANS)
	289	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans);
	290	out_err_create_16chans:
	291
	292	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base);
93ee0a75 LF	293	return ret;
	294	}
	295
281dfd0b	296	static int mc13783_adc_remove(struct platform_device *pdev)
93ee0a75 LF	297	{
93ee0a75 LF	298	struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
0c273215	299	kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data;
93ee0a75 LF	300
	301	hwmon_device_unregister(priv->hwmon_dev);
	302
eaf06ee2	303	if (!mc13783_adc_use_touchscreen(pdev))
93ee0a75 LF	304	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);
93ee0a75 LF	305
0c273215 UKK	306	if (driver_data & MC13783_ADC_16CHANS)
	307	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans);
	308
	309	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base);
93ee0a75	310
93ee0a75 LF	311	return 0;
	312	}
	313
0c273215 UKK	314	static const struct platform_device_id mc13783_adc_idtable[] = {
	315	{
	316	.name = "mc13783-adc",
	317	.driver_data = MC13783_ADC_16CHANS,
	318	}, {
	319	.name = "mc13892-adc",
	320	.driver_data = MC13783_ADC_BPDIV2,
	321	}, {
	322	/* sentinel */
	323	}
	324	};
	325	MODULE_DEVICE_TABLE(platform, mc13783_adc_idtable);
	326
93ee0a75	327	static struct platform_driver mc13783_adc_driver = {
9e5e9b7a	328	.remove = mc13783_adc_remove,
93ee0a75	329	.driver = {
0c273215	330	.name = DRIVER_NAME,
93ee0a75	331	},
0c273215	332	.id_table = mc13783_adc_idtable,
93ee0a75 LF	333	};
93ee0a75 LF	334
f40fb63e	335	module_platform_driver_probe(mc13783_adc_driver, mc13783_adc_probe);
93ee0a75 LF	336
	337	MODULE_DESCRIPTION("MC13783 ADC driver");
	338	MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
	339	MODULE_LICENSE("GPL");