[linux-2.6-block.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 i2c_client *client;
	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 atxp1_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->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 = atxp1_update_device(dev);
	struct i2c_client *client = data->client;
	int vid, cvid;
	unsigned long vcore;
	int err;

	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 = atxp1_update_device(dev);
	struct i2c_client *client = data->client;
	unsigned long value;
	int err;

	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 = data->client;
	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_attrs[] = {
	&dev_attr_gpio1.attr,
	&dev_attr_gpio2.attr,
	&dev_attr_cpu0_vid.attr,
	NULL
};
ATTRIBUTE_GROUPS(atxp1);

/* 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 *client,
		       const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct atxp1_data *data;
	struct device *hwmon_dev;

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

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

	data->client = client;
	mutex_init(&data->update_lock);

	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
							   data,
							   atxp1_groups);
	if (IS_ERR(hwmon_dev))
		return PTR_ERR(hwmon_dev);

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

	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,
	.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 {
11f7e494	49	struct i2c_client *client;
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	63	{
11f7e494 AL	64	struct atxp1_data *data = dev_get_drvdata(dev);
11f7e494 AL	65	struct i2c_client *client = data->client;
9cb7d184	66
9a61bf63	67	mutex_lock(&data->update_lock);
9cb7d184	68
0cacdf29	69	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
9cb7d184 SW	70
	71	/* Update local register data */
	72	data->reg.vid = i2c_smbus_read_byte_data(client, ATXP1_VID);
f24d548b GR	73	data->reg.cpu_vid = i2c_smbus_read_byte_data(client,
f24d548b GR	74	ATXP1_CVID);
9cb7d184 SW	75	data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
	76	data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
	77
	78	data->valid = 1;
	79	}
	80
9a61bf63	81	mutex_unlock(&data->update_lock);
9cb7d184	82
7fe83ad8	83	return data;
9cb7d184 SW	84	}
	85
	86	/* sys file functions for cpu0_vid */
f24d548b GR	87	static ssize_t atxp1_showvcore(struct device *dev,
f24d548b GR	88	struct device_attribute attr, char buf)
9cb7d184 SW	89	{
	90	int size;
	91	struct atxp1_data *data;
	92
	93	data = atxp1_update_device(dev);
	94
f24d548b GR	95	size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK,
f24d548b GR	96	data->vrm));
9cb7d184 SW	97
	98	return size;
	99	}
	100
f24d548b GR	101	static ssize_t atxp1_storevcore(struct device *dev,
	102	struct device_attribute *attr,
	103	const char *buf, size_t count)
9cb7d184	104	{
11f7e494 AL	105	struct atxp1_data *data = atxp1_update_device(dev);
11f7e494 AL	106	struct i2c_client *client = data->client;
c41bdb52	107	int vid, cvid;
f24d548b GR	108	unsigned long vcore;
f24d548b GR	109	int err;
9cb7d184	110
f24d548b GR	111	err = kstrtoul(buf, 10, &vcore);
	112	if (err)
	113	return err;
	114
9cb7d184 SW	115	vcore /= 25;
	116	vcore *= 25;
	117
	118	/* Calculate VID */
	119	vid = vid_to_reg(vcore, data->vrm);
9cb7d184 SW	120	if (vid < 0) {
9cb7d184 SW	121	dev_err(dev, "VID calculation failed.\n");
674d0ed8	122	return vid;
9cb7d184 SW	123	}
9cb7d184 SW	124
f24d548b GR	125	/*
	126	* If output enabled, use control register value.
	127	* Otherwise original CPU VID
	128	*/
9cb7d184 SW	129	if (data->reg.vid & ATXP1_VIDENA)
	130	cvid = data->reg.vid & ATXP1_VIDMASK;
	131	else
	132	cvid = data->reg.cpu_vid;
	133
	134	/* Nothing changed, aborting */
	135	if (vid == cvid)
	136	return count;
	137
f24d548b	138	dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", (int)vcore, vid);
9cb7d184 SW	139
	140	/* Write every 25 mV step to increase stability */
	141	if (cvid > vid) {
f24d548b GR	142	for (; cvid >= vid; cvid--)
	143	i2c_smbus_write_byte_data(client,
	144	ATXP1_VID, cvid \| ATXP1_VIDENA);
	145	} else {
	146	for (; cvid <= vid; cvid++)
	147	i2c_smbus_write_byte_data(client,
	148	ATXP1_VID, cvid \| ATXP1_VIDENA);
9cb7d184 SW	149	}
	150
	151	data->valid = 0;
	152
	153	return count;
	154	}
	155
f24d548b GR	156	/*
	157	* CPU core reference voltage
	158	* unit: millivolt
	159	*/
	160	static DEVICE_ATTR(cpu0_vid, S_IRUGO \| S_IWUSR, atxp1_showvcore,
	161	atxp1_storevcore);
9cb7d184 SW	162
9cb7d184 SW	163	/* sys file functions for GPIO1 */
f24d548b GR	164	static ssize_t atxp1_showgpio1(struct device *dev,
f24d548b GR	165	struct device_attribute attr, char buf)
9cb7d184 SW	166	{
	167	int size;
	168	struct atxp1_data *data;
	169
	170	data = atxp1_update_device(dev);
	171
	172	size = sprintf(buf, "0x%02x\n", data->reg.gpio1 & ATXP1_GPIO1MASK);
	173
	174	return size;
	175	}
	176
f24d548b GR	177	static ssize_t atxp1_storegpio1(struct device *dev,
	178	struct device_attribute attr, const char buf,
	179	size_t count)
9cb7d184	180	{
11f7e494 AL	181	struct atxp1_data *data = atxp1_update_device(dev);
11f7e494 AL	182	struct i2c_client *client = data->client;
f24d548b GR	183	unsigned long value;
f24d548b GR	184	int err;
9cb7d184	185
f24d548b GR	186	err = kstrtoul(buf, 16, &value);
	187	if (err)
	188	return err;
9cb7d184 SW	189
	190	value &= ATXP1_GPIO1MASK;
	191
	192	if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
f24d548b	193	dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);
9cb7d184 SW	194
	195	i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
	196
	197	data->valid = 0;
	198	}
	199
	200	return count;
	201	}
	202
f24d548b GR	203	/*
	204	* GPIO1 data register
	205	* unit: Four bit as hex (e.g. 0x0f)
	206	*/
9cb7d184 SW	207	static DEVICE_ATTR(gpio1, S_IRUGO \| S_IWUSR, atxp1_showgpio1, atxp1_storegpio1);
	208
	209	/* sys file functions for GPIO2 */
f24d548b GR	210	static ssize_t atxp1_showgpio2(struct device *dev,
f24d548b GR	211	struct device_attribute attr, char buf)
9cb7d184 SW	212	{
	213	int size;
	214	struct atxp1_data *data;
	215
	216	data = atxp1_update_device(dev);
	217
	218	size = sprintf(buf, "0x%02x\n", data->reg.gpio2);
	219
	220	return size;
	221	}
	222
f24d548b GR	223	static ssize_t atxp1_storegpio2(struct device *dev,
	224	struct device_attribute *attr,
	225	const char *buf, size_t count)
9cb7d184	226	{
f24d548b	227	struct atxp1_data *data = atxp1_update_device(dev);
11f7e494	228	struct i2c_client *client = data->client;
f24d548b GR	229	unsigned long value;
f24d548b GR	230	int err;
9cb7d184	231
f24d548b GR	232	err = kstrtoul(buf, 16, &value);
	233	if (err)
	234	return err;
	235	value &= 0xff;
9cb7d184 SW	236
9cb7d184 SW	237	if (value != data->reg.gpio2) {
f24d548b	238	dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);
9cb7d184 SW	239
	240	i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
	241
	242	data->valid = 0;
	243	}
	244
	245	return count;
	246	}
	247
f24d548b GR	248	/*
	249	* GPIO2 data register
	250	* unit: Eight bit as hex (e.g. 0xff)
	251	*/
9cb7d184 SW	252	static DEVICE_ATTR(gpio2, S_IRUGO \| S_IWUSR, atxp1_showgpio2, atxp1_storegpio2);
9cb7d184 SW	253
11f7e494	254	static struct attribute *atxp1_attrs[] = {
a5ebe668 JD	255	&dev_attr_gpio1.attr,
	256	&dev_attr_gpio2.attr,
	257	&dev_attr_cpu0_vid.attr,
	258	NULL
	259	};
11f7e494	260	ATTRIBUTE_GROUPS(atxp1);
9cb7d184	261
71163c7c	262	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	263	static int atxp1_detect(struct i2c_client *new_client,
71163c7c	264	struct i2c_board_info *info)
9cb7d184	265	{
71163c7c	266	struct i2c_adapter *adapter = new_client->adapter;
9cb7d184	267
9cb7d184 SW	268	u8 temp;
	269
	270	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
71163c7c	271	return -ENODEV;
9cb7d184 SW	272
	273	/* Detect ATXP1, checking if vendor ID registers are all zero */
	274	if (!((i2c_smbus_read_byte_data(new_client, 0x3e) == 0) &&
	275	(i2c_smbus_read_byte_data(new_client, 0x3f) == 0) &&
	276	(i2c_smbus_read_byte_data(new_client, 0xfe) == 0) &&
13b3c3fa JD	277	(i2c_smbus_read_byte_data(new_client, 0xff) == 0)))
13b3c3fa JD	278	return -ENODEV;
9cb7d184	279
f24d548b GR	280	/*
	281	* No vendor ID, now checking if registers 0x10,0x11 (non-existent)
	282	* showing the same as register 0x00
	283	*/
13b3c3fa	284	temp = i2c_smbus_read_byte_data(new_client, 0x00);
9cb7d184	285
13b3c3fa JD	286	if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
	287	(i2c_smbus_read_byte_data(new_client, 0x11) == temp)))
	288	return -ENODEV;
9cb7d184 SW	289
9cb7d184 SW	290	/* Get VRM */
71163c7c	291	temp = vid_which_vrm();
9cb7d184	292
71163c7c JD	293	if ((temp != 90) && (temp != 91)) {
	294	dev_err(&adapter->dev, "atxp1: Not supporting VRM %d.%d\n",
	295	temp / 10, temp % 10);
	296	return -ENODEV;
9cb7d184 SW	297	}
9cb7d184 SW	298
71163c7c	299	strlcpy(info->type, "atxp1", I2C_NAME_SIZE);
9cb7d184	300
71163c7c JD	301	return 0;
71163c7c JD	302	}
9cb7d184	303
11f7e494	304	static int atxp1_probe(struct i2c_client *client,
71163c7c JD	305	const struct i2c_device_id *id)
71163c7c JD	306	{
11f7e494	307	struct device *dev = &client->dev;
71163c7c	308	struct atxp1_data *data;
11f7e494	309	struct device *hwmon_dev;
9cb7d184	310
11f7e494	311	data = devm_kzalloc(dev, sizeof(struct atxp1_data), GFP_KERNEL);
d466a353 GR	312	if (!data)
d466a353 GR	313	return -ENOMEM;
9cb7d184	314
71163c7c JD	315	/* Get VRM */
	316	data->vrm = vid_which_vrm();
	317
11f7e494	318	data->client = client;
71163c7c JD	319	mutex_init(&data->update_lock);
71163c7c JD	320
11f7e494 AL	321	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
	322	data,
	323	atxp1_groups);
	324	if (IS_ERR(hwmon_dev))
	325	return PTR_ERR(hwmon_dev);
9cb7d184	326
11f7e494	327	dev_info(dev, "Using VRM: %d.%d\n", data->vrm / 10, data->vrm % 10);
943b0830	328
71163c7c	329	return 0;
9cb7d184 SW	330	};
9cb7d184 SW	331
8dea1b4e AL	332	static const struct i2c_device_id atxp1_id[] = {
	333	{ "atxp1", 0 },
	334	{ }
	335	};
	336	MODULE_DEVICE_TABLE(i2c, atxp1_id);
	337
	338	static struct i2c_driver atxp1_driver = {
	339	.class = I2C_CLASS_HWMON,
	340	.driver = {
	341	.name = "atxp1",
	342	},
	343	.probe = atxp1_probe,
8dea1b4e AL	344	.id_table = atxp1_id,
	345	.detect = atxp1_detect,
	346	.address_list = normal_i2c,
	347	};
	348
f0967eea	349	module_i2c_driver(atxp1_driver);