[mirror_ubuntu-zesty-kernel.git] / drivers / hwmon / atxp1.c

/*
 * atxp1.c - kernel module for setting CPU VID and general purpose
 *	     I/Os using the Attansic ATXP1 chip.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/slab.h>

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("System voltages control via Attansic ATXP1");
MODULE_VERSION("0.6.3");
MODULE_AUTHOR("Sebastian Witt <se.witt@gmx.net>");

#define ATXP1_VID	0x00
#define ATXP1_CVID	0x01
#define ATXP1_GPIO1	0x06
#define ATXP1_GPIO2	0x0a
#define ATXP1_VIDENA	0x20
#define ATXP1_VIDMASK	0x1f
#define ATXP1_GPIO1MASK	0x0f

static const unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };

struct atxp1_data {
	struct device *hwmon_dev;
	struct mutex update_lock;
	unsigned long last_updated;
	u8 valid;
	struct {
		u8 vid;		/* VID output register */
		u8 cpu_vid; /* VID input from CPU */
		u8 gpio1;   /* General purpose I/O register 1 */
		u8 gpio2;   /* General purpose I/O register 2 */
	} reg;
	u8 vrm;			/* Detected CPU VRM */
};

static struct atxp1_data *atxp1_update_device(struct device *dev)
{
	struct i2c_client *client;
	struct atxp1_data *data;

	client = to_i2c_client(dev);
	data = i2c_get_clientdata(client);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {

		/* Update local register data */
		data->reg.vid = i2c_smbus_read_byte_data(client, ATXP1_VID);
		data->reg.cpu_vid = i2c_smbus_read_byte_data(client,
							     ATXP1_CVID);
		data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
		data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);

		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

/* sys file functions for cpu0_vid */
static ssize_t atxp1_showvcore(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	int size;
	struct atxp1_data *data;

	data = atxp1_update_device(dev);

	size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK,
						 data->vrm));

	return size;
}

static ssize_t atxp1_storevcore(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct atxp1_data *data;
	struct i2c_client *client;
	int vid, cvid;
	unsigned long vcore;
	int err;

	client = to_i2c_client(dev);
	data = atxp1_update_device(dev);

	err = kstrtoul(buf, 10, &vcore);
	if (err)
		return err;

	vcore /= 25;
	vcore *= 25;

	/* Calculate VID */
	vid = vid_to_reg(vcore, data->vrm);
	if (vid < 0) {
		dev_err(dev, "VID calculation failed.\n");
		return vid;
	}

	/*
	 * If output enabled, use control register value.
	 * Otherwise original CPU VID
	 */
	if (data->reg.vid & ATXP1_VIDENA)
		cvid = data->reg.vid & ATXP1_VIDMASK;
	else
		cvid = data->reg.cpu_vid;

	/* Nothing changed, aborting */
	if (vid == cvid)
		return count;

	dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", (int)vcore, vid);

	/* Write every 25 mV step to increase stability */
	if (cvid > vid) {
		for (; cvid >= vid; cvid--)
			i2c_smbus_write_byte_data(client,
						ATXP1_VID, cvid | ATXP1_VIDENA);
	} else {
		for (; cvid <= vid; cvid++)
			i2c_smbus_write_byte_data(client,
						ATXP1_VID, cvid | ATXP1_VIDENA);
	}

	data->valid = 0;

	return count;
}

/*
 * CPU core reference voltage
 * unit: millivolt
 */
static DEVICE_ATTR(cpu0_vid, S_IRUGO | S_IWUSR, atxp1_showvcore,
		   atxp1_storevcore);

/* sys file functions for GPIO1 */
static ssize_t atxp1_showgpio1(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	int size;
	struct atxp1_data *data;

	data = atxp1_update_device(dev);

	size = sprintf(buf, "0x%02x\n", data->reg.gpio1 & ATXP1_GPIO1MASK);

	return size;
}

static ssize_t atxp1_storegpio1(struct device *dev,
				struct device_attribute *attr, const char *buf,
				size_t count)
{
	struct atxp1_data *data;
	struct i2c_client *client;
	unsigned long value;
	int err;

	client = to_i2c_client(dev);
	data = atxp1_update_device(dev);

	err = kstrtoul(buf, 16, &value);
	if (err)
		return err;

	value &= ATXP1_GPIO1MASK;

	if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
		dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);

		i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);

		data->valid = 0;
	}

	return count;
}

/*
 * GPIO1 data register
 * unit: Four bit as hex (e.g. 0x0f)
 */
static DEVICE_ATTR(gpio1, S_IRUGO | S_IWUSR, atxp1_showgpio1, atxp1_storegpio1);

/* sys file functions for GPIO2 */
static ssize_t atxp1_showgpio2(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	int size;
	struct atxp1_data *data;

	data = atxp1_update_device(dev);

	size = sprintf(buf, "0x%02x\n", data->reg.gpio2);

	return size;
}

static ssize_t atxp1_storegpio2(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct atxp1_data *data = atxp1_update_device(dev);
	struct i2c_client *client = to_i2c_client(dev);
	unsigned long value;
	int err;

	err = kstrtoul(buf, 16, &value);
	if (err)
		return err;
	value &= 0xff;

	if (value != data->reg.gpio2) {
		dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);

		i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);

		data->valid = 0;
	}

	return count;
}

/*
 * GPIO2 data register
 * unit: Eight bit as hex (e.g. 0xff)
 */
static DEVICE_ATTR(gpio2, S_IRUGO | S_IWUSR, atxp1_showgpio2, atxp1_storegpio2);

static struct attribute *atxp1_attributes[] = {
	&dev_attr_gpio1.attr,
	&dev_attr_gpio2.attr,
	&dev_attr_cpu0_vid.attr,
	NULL
};

static const struct attribute_group atxp1_group = {
	.attrs = atxp1_attributes,
};


/* Return 0 if detection is successful, -ENODEV otherwise */
static int atxp1_detect(struct i2c_client *new_client,
			struct i2c_board_info *info)
{
	struct i2c_adapter *adapter = new_client->adapter;

	u8 temp;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -ENODEV;

	/* Detect ATXP1, checking if vendor ID registers are all zero */
	if (!((i2c_smbus_read_byte_data(new_client, 0x3e) == 0) &&
	     (i2c_smbus_read_byte_data(new_client, 0x3f) == 0) &&
	     (i2c_smbus_read_byte_data(new_client, 0xfe) == 0) &&
	     (i2c_smbus_read_byte_data(new_client, 0xff) == 0)))
		return -ENODEV;

	/*
	 * No vendor ID, now checking if registers 0x10,0x11 (non-existent)
	 * showing the same as register 0x00
	 */
	temp = i2c_smbus_read_byte_data(new_client, 0x00);

	if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
	      (i2c_smbus_read_byte_data(new_client, 0x11) == temp)))
		return -ENODEV;

	/* Get VRM */
	temp = vid_which_vrm();

	if ((temp != 90) && (temp != 91)) {
		dev_err(&adapter->dev, "atxp1: Not supporting VRM %d.%d\n",
				temp / 10, temp % 10);
		return -ENODEV;
	}

	strlcpy(info->type, "atxp1", I2C_NAME_SIZE);

	return 0;
}

static int atxp1_probe(struct i2c_client *new_client,
		       const struct i2c_device_id *id)
{
	struct atxp1_data *data;
	int err;

	data = devm_kzalloc(&new_client->dev, sizeof(struct atxp1_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	/* Get VRM */
	data->vrm = vid_which_vrm();

	i2c_set_clientdata(new_client, data);
	mutex_init(&data->update_lock);

	/* Register sysfs hooks */
	err = sysfs_create_group(&new_client->dev.kobj, &atxp1_group);
	if (err)
		return err;

	data->hwmon_dev = hwmon_device_register(&new_client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto exit_remove_files;
	}

	dev_info(&new_client->dev, "Using VRM: %d.%d\n",
			 data->vrm / 10, data->vrm % 10);

	return 0;

exit_remove_files:
	sysfs_remove_group(&new_client->dev.kobj, &atxp1_group);
	return err;
};

static int atxp1_remove(struct i2c_client *client)
{
	struct atxp1_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &atxp1_group);

	return 0;
};

static const struct i2c_device_id atxp1_id[] = {
	{ "atxp1", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, atxp1_id);

static struct i2c_driver atxp1_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name	= "atxp1",
	},
	.probe		= atxp1_probe,
	.remove		= atxp1_remove,
	.id_table	= atxp1_id,
	.detect		= atxp1_detect,
	.address_list	= normal_i2c,
};

module_i2c_driver(atxp1_driver);
Commit	Line	Data
9cb7d184	1	/*
f24d548b GR	2	* atxp1.c - kernel module for setting CPU VID and general purpose
	3	* I/Os using the Attansic ATXP1 chip.
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	18	*
	19	*/
9cb7d184 SW	20
	21	#include <linux/kernel.h>
	22	#include <linux/init.h>
	23	#include <linux/module.h>
0cacdf29	24	#include <linux/jiffies.h>
9cb7d184	25	#include <linux/i2c.h>
943b0830	26	#include <linux/hwmon.h>
303760b4	27	#include <linux/hwmon-vid.h>
943b0830	28	#include <linux/err.h>
9a61bf63	29	#include <linux/mutex.h>
a5ebe668	30	#include <linux/sysfs.h>
5a0e3ad6	31	#include <linux/slab.h>
9cb7d184 SW	32
	33	MODULE_LICENSE("GPL");
	34	MODULE_DESCRIPTION("System voltages control via Attansic ATXP1");
13b3c3fa	35	MODULE_VERSION("0.6.3");
9cb7d184 SW	36	MODULE_AUTHOR("Sebastian Witt <se.witt@gmx.net>");
	37
	38	#define ATXP1_VID 0x00
	39	#define ATXP1_CVID 0x01
	40	#define ATXP1_GPIO1 0x06
	41	#define ATXP1_GPIO2 0x0a
	42	#define ATXP1_VIDENA 0x20
	43	#define ATXP1_VIDMASK 0x1f
	44	#define ATXP1_GPIO1MASK 0x0f
	45
25e9c86d	46	static const unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };
9cb7d184	47
9cb7d184	48	struct atxp1_data {
1beeffe4	49	struct device *hwmon_dev;
9a61bf63	50	struct mutex update_lock;
9cb7d184 SW	51	unsigned long last_updated;
	52	u8 valid;
	53	struct {
	54	u8 vid; /* VID output register */
	55	u8 cpu_vid; /* VID input from CPU */
	56	u8 gpio1; /* General purpose I/O register 1 */
	57	u8 gpio2; /* General purpose I/O register 2 */
	58	} reg;
	59	u8 vrm; /* Detected CPU VRM */
	60	};
	61
f24d548b	62	static struct atxp1_data atxp1_update_device(struct device dev)
9cb7d184 SW	63	{
	64	struct i2c_client *client;
	65	struct atxp1_data *data;
	66
	67	client = to_i2c_client(dev);
	68	data = i2c_get_clientdata(client);
	69
9a61bf63	70	mutex_lock(&data->update_lock);
9cb7d184	71
0cacdf29	72	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
9cb7d184 SW	73
	74	/* Update local register data */
	75	data->reg.vid = i2c_smbus_read_byte_data(client, ATXP1_VID);
f24d548b GR	76	data->reg.cpu_vid = i2c_smbus_read_byte_data(client,
f24d548b GR	77	ATXP1_CVID);
9cb7d184 SW	78	data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
	79	data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
	80
	81	data->valid = 1;
	82	}
	83
9a61bf63	84	mutex_unlock(&data->update_lock);
9cb7d184	85
7fe83ad8	86	return data;
9cb7d184 SW	87	}
	88
	89	/* sys file functions for cpu0_vid */
f24d548b GR	90	static ssize_t atxp1_showvcore(struct device *dev,
f24d548b GR	91	struct device_attribute attr, char buf)
9cb7d184 SW	92	{
	93	int size;
	94	struct atxp1_data *data;
	95
	96	data = atxp1_update_device(dev);
	97
f24d548b GR	98	size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK,
f24d548b GR	99	data->vrm));
9cb7d184 SW	100
	101	return size;
	102	}
	103
f24d548b GR	104	static ssize_t atxp1_storevcore(struct device *dev,
	105	struct device_attribute *attr,
	106	const char *buf, size_t count)
9cb7d184 SW	107	{
	108	struct atxp1_data *data;
	109	struct i2c_client *client;
c41bdb52	110	int vid, cvid;
f24d548b GR	111	unsigned long vcore;
f24d548b GR	112	int err;
9cb7d184 SW	113
	114	client = to_i2c_client(dev);
	115	data = atxp1_update_device(dev);
	116
f24d548b GR	117	err = kstrtoul(buf, 10, &vcore);
	118	if (err)
	119	return err;
	120
9cb7d184 SW	121	vcore /= 25;
	122	vcore *= 25;
	123
	124	/* Calculate VID */
	125	vid = vid_to_reg(vcore, data->vrm);
9cb7d184 SW	126	if (vid < 0) {
9cb7d184 SW	127	dev_err(dev, "VID calculation failed.\n");
674d0ed8	128	return vid;
9cb7d184 SW	129	}
9cb7d184 SW	130
f24d548b GR	131	/*
	132	* If output enabled, use control register value.
	133	* Otherwise original CPU VID
	134	*/
9cb7d184 SW	135	if (data->reg.vid & ATXP1_VIDENA)
	136	cvid = data->reg.vid & ATXP1_VIDMASK;
	137	else
	138	cvid = data->reg.cpu_vid;
	139
	140	/* Nothing changed, aborting */
	141	if (vid == cvid)
	142	return count;
	143
f24d548b	144	dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", (int)vcore, vid);
9cb7d184 SW	145
	146	/* Write every 25 mV step to increase stability */
	147	if (cvid > vid) {
f24d548b GR	148	for (; cvid >= vid; cvid--)
	149	i2c_smbus_write_byte_data(client,
	150	ATXP1_VID, cvid \| ATXP1_VIDENA);
	151	} else {
	152	for (; cvid <= vid; cvid++)
	153	i2c_smbus_write_byte_data(client,
	154	ATXP1_VID, cvid \| ATXP1_VIDENA);
9cb7d184 SW	155	}
	156
	157	data->valid = 0;
	158
	159	return count;
	160	}
	161
f24d548b GR	162	/*
	163	* CPU core reference voltage
	164	* unit: millivolt
	165	*/
	166	static DEVICE_ATTR(cpu0_vid, S_IRUGO \| S_IWUSR, atxp1_showvcore,
	167	atxp1_storevcore);
9cb7d184 SW	168
9cb7d184 SW	169	/* sys file functions for GPIO1 */
f24d548b GR	170	static ssize_t atxp1_showgpio1(struct device *dev,
f24d548b GR	171	struct device_attribute attr, char buf)
9cb7d184 SW	172	{
	173	int size;
	174	struct atxp1_data *data;
	175
	176	data = atxp1_update_device(dev);
	177
	178	size = sprintf(buf, "0x%02x\n", data->reg.gpio1 & ATXP1_GPIO1MASK);
	179
	180	return size;
	181	}
	182
f24d548b GR	183	static ssize_t atxp1_storegpio1(struct device *dev,
	184	struct device_attribute attr, const char buf,
	185	size_t count)
9cb7d184 SW	186	{
	187	struct atxp1_data *data;
	188	struct i2c_client *client;
f24d548b GR	189	unsigned long value;
f24d548b GR	190	int err;
9cb7d184 SW	191
	192	client = to_i2c_client(dev);
	193	data = atxp1_update_device(dev);
	194
f24d548b GR	195	err = kstrtoul(buf, 16, &value);
	196	if (err)
	197	return err;
9cb7d184 SW	198
	199	value &= ATXP1_GPIO1MASK;
	200
	201	if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
f24d548b	202	dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);
9cb7d184 SW	203
	204	i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
	205
	206	data->valid = 0;
	207	}
	208
	209	return count;
	210	}
	211
f24d548b GR	212	/*
	213	* GPIO1 data register
	214	* unit: Four bit as hex (e.g. 0x0f)
	215	*/
9cb7d184 SW	216	static DEVICE_ATTR(gpio1, S_IRUGO \| S_IWUSR, atxp1_showgpio1, atxp1_storegpio1);
	217
	218	/* sys file functions for GPIO2 */
f24d548b GR	219	static ssize_t atxp1_showgpio2(struct device *dev,
f24d548b GR	220	struct device_attribute attr, char buf)
9cb7d184 SW	221	{
	222	int size;
	223	struct atxp1_data *data;
	224
	225	data = atxp1_update_device(dev);
	226
	227	size = sprintf(buf, "0x%02x\n", data->reg.gpio2);
	228
	229	return size;
	230	}
	231
f24d548b GR	232	static ssize_t atxp1_storegpio2(struct device *dev,
	233	struct device_attribute *attr,
	234	const char *buf, size_t count)
9cb7d184	235	{
f24d548b GR	236	struct atxp1_data *data = atxp1_update_device(dev);
	237	struct i2c_client *client = to_i2c_client(dev);
	238	unsigned long value;
	239	int err;
9cb7d184	240
f24d548b GR	241	err = kstrtoul(buf, 16, &value);
	242	if (err)
	243	return err;
	244	value &= 0xff;
9cb7d184 SW	245
9cb7d184 SW	246	if (value != data->reg.gpio2) {
f24d548b	247	dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);
9cb7d184 SW	248
	249	i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
	250
	251	data->valid = 0;
	252	}
	253
	254	return count;
	255	}
	256
f24d548b GR	257	/*
	258	* GPIO2 data register
	259	* unit: Eight bit as hex (e.g. 0xff)
	260	*/
9cb7d184 SW	261	static DEVICE_ATTR(gpio2, S_IRUGO \| S_IWUSR, atxp1_showgpio2, atxp1_storegpio2);
9cb7d184 SW	262
a5ebe668 JD	263	static struct attribute *atxp1_attributes[] = {
	264	&dev_attr_gpio1.attr,
	265	&dev_attr_gpio2.attr,
	266	&dev_attr_cpu0_vid.attr,
	267	NULL
	268	};
	269
	270	static const struct attribute_group atxp1_group = {
	271	.attrs = atxp1_attributes,
	272	};
	273
9cb7d184	274
71163c7c	275	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	276	static int atxp1_detect(struct i2c_client *new_client,
71163c7c	277	struct i2c_board_info *info)
9cb7d184	278	{
71163c7c	279	struct i2c_adapter *adapter = new_client->adapter;
9cb7d184	280
9cb7d184 SW	281	u8 temp;
	282
	283	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
71163c7c	284	return -ENODEV;
9cb7d184 SW	285
	286	/* Detect ATXP1, checking if vendor ID registers are all zero */
	287	if (!((i2c_smbus_read_byte_data(new_client, 0x3e) == 0) &&
	288	(i2c_smbus_read_byte_data(new_client, 0x3f) == 0) &&
	289	(i2c_smbus_read_byte_data(new_client, 0xfe) == 0) &&
13b3c3fa JD	290	(i2c_smbus_read_byte_data(new_client, 0xff) == 0)))
13b3c3fa JD	291	return -ENODEV;
9cb7d184	292
f24d548b GR	293	/*
	294	* No vendor ID, now checking if registers 0x10,0x11 (non-existent)
	295	* showing the same as register 0x00
	296	*/
13b3c3fa	297	temp = i2c_smbus_read_byte_data(new_client, 0x00);
9cb7d184	298
13b3c3fa JD	299	if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
	300	(i2c_smbus_read_byte_data(new_client, 0x11) == temp)))
	301	return -ENODEV;
9cb7d184 SW	302
9cb7d184 SW	303	/* Get VRM */
71163c7c	304	temp = vid_which_vrm();
9cb7d184	305
71163c7c JD	306	if ((temp != 90) && (temp != 91)) {
	307	dev_err(&adapter->dev, "atxp1: Not supporting VRM %d.%d\n",
	308	temp / 10, temp % 10);
	309	return -ENODEV;
9cb7d184 SW	310	}
9cb7d184 SW	311
71163c7c	312	strlcpy(info->type, "atxp1", I2C_NAME_SIZE);
9cb7d184	313
71163c7c JD	314	return 0;
71163c7c JD	315	}
9cb7d184	316
71163c7c JD	317	static int atxp1_probe(struct i2c_client *new_client,
	318	const struct i2c_device_id *id)
	319	{
	320	struct atxp1_data *data;
	321	int err;
9cb7d184	322
d466a353 GR	323	data = devm_kzalloc(&new_client->dev, sizeof(struct atxp1_data),
	324	GFP_KERNEL);
	325	if (!data)
	326	return -ENOMEM;
9cb7d184	327
71163c7c JD	328	/* Get VRM */
	329	data->vrm = vid_which_vrm();
	330
	331	i2c_set_clientdata(new_client, data);
71163c7c JD	332	mutex_init(&data->update_lock);
71163c7c JD	333
a5ebe668	334	/* Register sysfs hooks */
f24d548b GR	335	err = sysfs_create_group(&new_client->dev.kobj, &atxp1_group);
f24d548b GR	336	if (err)
d466a353	337	return err;
a5ebe668	338
1beeffe4 TJ	339	data->hwmon_dev = hwmon_device_register(&new_client->dev);
	340	if (IS_ERR(data->hwmon_dev)) {
	341	err = PTR_ERR(data->hwmon_dev);
a5ebe668	342	goto exit_remove_files;
943b0830 MH	343	}
943b0830 MH	344
9cb7d184 SW	345	dev_info(&new_client->dev, "Using VRM: %d.%d\n",
	346	data->vrm / 10, data->vrm % 10);
	347
	348	return 0;
	349
a5ebe668 JD	350	exit_remove_files:
a5ebe668 JD	351	sysfs_remove_group(&new_client->dev.kobj, &atxp1_group);
9cb7d184 SW	352	return err;
	353	};
	354
71163c7c	355	static int atxp1_remove(struct i2c_client *client)
9cb7d184	356	{
f24d548b	357	struct atxp1_data *data = i2c_get_clientdata(client);
9cb7d184	358
1beeffe4	359	hwmon_device_unregister(data->hwmon_dev);
a5ebe668	360	sysfs_remove_group(&client->dev.kobj, &atxp1_group);
943b0830	361
71163c7c	362	return 0;
9cb7d184 SW	363	};
9cb7d184 SW	364
8dea1b4e AL	365	static const struct i2c_device_id atxp1_id[] = {
	366	{ "atxp1", 0 },
	367	{ }
	368	};
	369	MODULE_DEVICE_TABLE(i2c, atxp1_id);
	370
	371	static struct i2c_driver atxp1_driver = {
	372	.class = I2C_CLASS_HWMON,
	373	.driver = {
	374	.name = "atxp1",
	375	},
	376	.probe = atxp1_probe,
	377	.remove = atxp1_remove,
	378	.id_table = atxp1_id,
	379	.detect = atxp1_detect,
	380	.address_list = normal_i2c,
	381	};
	382
f0967eea	383	module_i2c_driver(atxp1_driver);