[deliverable/linux.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 };

static int atxp1_probe(struct i2c_client *client,
		       const struct i2c_device_id *id);
static int atxp1_remove(struct i2c_client *client);
static struct atxp1_data *atxp1_update_device(struct device *dev);
static int atxp1_detect(struct i2c_client *client, struct i2c_board_info *info);

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,
};

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 -1;
	}

	/*
	 * 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);
	data->valid = 0;

	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;
};

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
71163c7c JD	48	static int atxp1_probe(struct i2c_client *client,
	49	const struct i2c_device_id *id);
	50	static int atxp1_remove(struct i2c_client *client);
f24d548b	51	static struct atxp1_data atxp1_update_device(struct device dev);
310ec792	52	static int atxp1_detect(struct i2c_client client, struct i2c_board_info info);
71163c7c JD	53
71163c7c JD	54	static const struct i2c_device_id atxp1_id[] = {
1f86df49	55	{ "atxp1", 0 },
71163c7c JD	56	{ }
	57	};
	58	MODULE_DEVICE_TABLE(i2c, atxp1_id);
9cb7d184 SW	59
9cb7d184 SW	60	static struct i2c_driver atxp1_driver = {
71163c7c	61	.class = I2C_CLASS_HWMON,
cdaf7934	62	.driver = {
cdaf7934 LR	63	.name = "atxp1",
cdaf7934 LR	64	},
71163c7c JD	65	.probe = atxp1_probe,
	66	.remove = atxp1_remove,
	67	.id_table = atxp1_id,
	68	.detect = atxp1_detect,
c3813d6a	69	.address_list = normal_i2c,
9cb7d184 SW	70	};
	71
	72	struct atxp1_data {
1beeffe4	73	struct device *hwmon_dev;
9a61bf63	74	struct mutex update_lock;
9cb7d184 SW	75	unsigned long last_updated;
	76	u8 valid;
	77	struct {
	78	u8 vid; /* VID output register */
	79	u8 cpu_vid; /* VID input from CPU */
	80	u8 gpio1; /* General purpose I/O register 1 */
	81	u8 gpio2; /* General purpose I/O register 2 */
	82	} reg;
	83	u8 vrm; /* Detected CPU VRM */
	84	};
	85
f24d548b	86	static struct atxp1_data atxp1_update_device(struct device dev)
9cb7d184 SW	87	{
	88	struct i2c_client *client;
	89	struct atxp1_data *data;
	90
	91	client = to_i2c_client(dev);
	92	data = i2c_get_clientdata(client);
	93
9a61bf63	94	mutex_lock(&data->update_lock);
9cb7d184	95
0cacdf29	96	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
9cb7d184 SW	97
	98	/* Update local register data */
	99	data->reg.vid = i2c_smbus_read_byte_data(client, ATXP1_VID);
f24d548b GR	100	data->reg.cpu_vid = i2c_smbus_read_byte_data(client,
f24d548b GR	101	ATXP1_CVID);
9cb7d184 SW	102	data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
	103	data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
	104
	105	data->valid = 1;
	106	}
	107
9a61bf63	108	mutex_unlock(&data->update_lock);
9cb7d184	109
7fe83ad8	110	return data;
9cb7d184 SW	111	}
	112
	113	/* sys file functions for cpu0_vid */
f24d548b GR	114	static ssize_t atxp1_showvcore(struct device *dev,
f24d548b GR	115	struct device_attribute attr, char buf)
9cb7d184 SW	116	{
	117	int size;
	118	struct atxp1_data *data;
	119
	120	data = atxp1_update_device(dev);
	121
f24d548b GR	122	size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK,
f24d548b GR	123	data->vrm));
9cb7d184 SW	124
	125	return size;
	126	}
	127
f24d548b GR	128	static ssize_t atxp1_storevcore(struct device *dev,
	129	struct device_attribute *attr,
	130	const char *buf, size_t count)
9cb7d184 SW	131	{
	132	struct atxp1_data *data;
	133	struct i2c_client *client;
c41bdb52	134	int vid, cvid;
f24d548b GR	135	unsigned long vcore;
f24d548b GR	136	int err;
9cb7d184 SW	137
	138	client = to_i2c_client(dev);
	139	data = atxp1_update_device(dev);
	140
f24d548b GR	141	err = kstrtoul(buf, 10, &vcore);
	142	if (err)
	143	return err;
	144
9cb7d184 SW	145	vcore /= 25;
	146	vcore *= 25;
	147
	148	/* Calculate VID */
	149	vid = vid_to_reg(vcore, data->vrm);
	150
	151	if (vid < 0) {
	152	dev_err(dev, "VID calculation failed.\n");
	153	return -1;
	154	}
	155
f24d548b GR	156	/*
	157	* If output enabled, use control register value.
	158	* Otherwise original CPU VID
	159	*/
9cb7d184 SW	160	if (data->reg.vid & ATXP1_VIDENA)
	161	cvid = data->reg.vid & ATXP1_VIDMASK;
	162	else
	163	cvid = data->reg.cpu_vid;
	164
	165	/* Nothing changed, aborting */
	166	if (vid == cvid)
	167	return count;
	168
f24d548b	169	dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", (int)vcore, vid);
9cb7d184 SW	170
	171	/* Write every 25 mV step to increase stability */
	172	if (cvid > vid) {
f24d548b GR	173	for (; cvid >= vid; cvid--)
	174	i2c_smbus_write_byte_data(client,
	175	ATXP1_VID, cvid \| ATXP1_VIDENA);
	176	} else {
	177	for (; cvid <= vid; cvid++)
	178	i2c_smbus_write_byte_data(client,
	179	ATXP1_VID, cvid \| ATXP1_VIDENA);
9cb7d184 SW	180	}
	181
	182	data->valid = 0;
	183
	184	return count;
	185	}
	186
f24d548b GR	187	/*
	188	* CPU core reference voltage
	189	* unit: millivolt
	190	*/
	191	static DEVICE_ATTR(cpu0_vid, S_IRUGO \| S_IWUSR, atxp1_showvcore,
	192	atxp1_storevcore);
9cb7d184 SW	193
9cb7d184 SW	194	/* sys file functions for GPIO1 */
f24d548b GR	195	static ssize_t atxp1_showgpio1(struct device *dev,
f24d548b GR	196	struct device_attribute attr, char buf)
9cb7d184 SW	197	{
	198	int size;
	199	struct atxp1_data *data;
	200
	201	data = atxp1_update_device(dev);
	202
	203	size = sprintf(buf, "0x%02x\n", data->reg.gpio1 & ATXP1_GPIO1MASK);
	204
	205	return size;
	206	}
	207
f24d548b GR	208	static ssize_t atxp1_storegpio1(struct device *dev,
	209	struct device_attribute attr, const char buf,
	210	size_t count)
9cb7d184 SW	211	{
	212	struct atxp1_data *data;
	213	struct i2c_client *client;
f24d548b GR	214	unsigned long value;
f24d548b GR	215	int err;
9cb7d184 SW	216
	217	client = to_i2c_client(dev);
	218	data = atxp1_update_device(dev);
	219
f24d548b GR	220	err = kstrtoul(buf, 16, &value);
	221	if (err)
	222	return err;
9cb7d184 SW	223
	224	value &= ATXP1_GPIO1MASK;
	225
	226	if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
f24d548b	227	dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);
9cb7d184 SW	228
	229	i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
	230
	231	data->valid = 0;
	232	}
	233
	234	return count;
	235	}
	236
f24d548b GR	237	/*
	238	* GPIO1 data register
	239	* unit: Four bit as hex (e.g. 0x0f)
	240	*/
9cb7d184 SW	241	static DEVICE_ATTR(gpio1, S_IRUGO \| S_IWUSR, atxp1_showgpio1, atxp1_storegpio1);
	242
	243	/* sys file functions for GPIO2 */
f24d548b GR	244	static ssize_t atxp1_showgpio2(struct device *dev,
f24d548b GR	245	struct device_attribute attr, char buf)
9cb7d184 SW	246	{
	247	int size;
	248	struct atxp1_data *data;
	249
	250	data = atxp1_update_device(dev);
	251
	252	size = sprintf(buf, "0x%02x\n", data->reg.gpio2);
	253
	254	return size;
	255	}
	256
f24d548b GR	257	static ssize_t atxp1_storegpio2(struct device *dev,
	258	struct device_attribute *attr,
	259	const char *buf, size_t count)
9cb7d184	260	{
f24d548b GR	261	struct atxp1_data *data = atxp1_update_device(dev);
	262	struct i2c_client *client = to_i2c_client(dev);
	263	unsigned long value;
	264	int err;
9cb7d184	265
f24d548b GR	266	err = kstrtoul(buf, 16, &value);
	267	if (err)
	268	return err;
	269	value &= 0xff;
9cb7d184 SW	270
9cb7d184 SW	271	if (value != data->reg.gpio2) {
f24d548b	272	dev_info(dev, "Writing 0x%x to GPIO1.\n", (unsigned int)value);
9cb7d184 SW	273
	274	i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
	275
	276	data->valid = 0;
	277	}
	278
	279	return count;
	280	}
	281
f24d548b GR	282	/*
	283	* GPIO2 data register
	284	* unit: Eight bit as hex (e.g. 0xff)
	285	*/
9cb7d184 SW	286	static DEVICE_ATTR(gpio2, S_IRUGO \| S_IWUSR, atxp1_showgpio2, atxp1_storegpio2);
9cb7d184 SW	287
a5ebe668 JD	288	static struct attribute *atxp1_attributes[] = {
	289	&dev_attr_gpio1.attr,
	290	&dev_attr_gpio2.attr,
	291	&dev_attr_cpu0_vid.attr,
	292	NULL
	293	};
	294
	295	static const struct attribute_group atxp1_group = {
	296	.attrs = atxp1_attributes,
	297	};
	298
9cb7d184	299
71163c7c	300	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	301	static int atxp1_detect(struct i2c_client *new_client,
71163c7c	302	struct i2c_board_info *info)
9cb7d184	303	{
71163c7c	304	struct i2c_adapter *adapter = new_client->adapter;
9cb7d184	305
9cb7d184 SW	306	u8 temp;
	307
	308	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
71163c7c	309	return -ENODEV;
9cb7d184 SW	310
	311	/* Detect ATXP1, checking if vendor ID registers are all zero */
	312	if (!((i2c_smbus_read_byte_data(new_client, 0x3e) == 0) &&
	313	(i2c_smbus_read_byte_data(new_client, 0x3f) == 0) &&
	314	(i2c_smbus_read_byte_data(new_client, 0xfe) == 0) &&
13b3c3fa JD	315	(i2c_smbus_read_byte_data(new_client, 0xff) == 0)))
13b3c3fa JD	316	return -ENODEV;
9cb7d184	317
f24d548b GR	318	/*
	319	* No vendor ID, now checking if registers 0x10,0x11 (non-existent)
	320	* showing the same as register 0x00
	321	*/
13b3c3fa	322	temp = i2c_smbus_read_byte_data(new_client, 0x00);
9cb7d184	323
13b3c3fa JD	324	if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
	325	(i2c_smbus_read_byte_data(new_client, 0x11) == temp)))
	326	return -ENODEV;
9cb7d184 SW	327
9cb7d184 SW	328	/* Get VRM */
71163c7c	329	temp = vid_which_vrm();
9cb7d184	330
71163c7c JD	331	if ((temp != 90) && (temp != 91)) {
	332	dev_err(&adapter->dev, "atxp1: Not supporting VRM %d.%d\n",
	333	temp / 10, temp % 10);
	334	return -ENODEV;
9cb7d184 SW	335	}
9cb7d184 SW	336
71163c7c	337	strlcpy(info->type, "atxp1", I2C_NAME_SIZE);
9cb7d184	338
71163c7c JD	339	return 0;
71163c7c JD	340	}
9cb7d184	341
71163c7c JD	342	static int atxp1_probe(struct i2c_client *new_client,
	343	const struct i2c_device_id *id)
	344	{
	345	struct atxp1_data *data;
	346	int err;
9cb7d184	347
d466a353 GR	348	data = devm_kzalloc(&new_client->dev, sizeof(struct atxp1_data),
	349	GFP_KERNEL);
	350	if (!data)
	351	return -ENOMEM;
9cb7d184	352
71163c7c JD	353	/* Get VRM */
	354	data->vrm = vid_which_vrm();
	355
	356	i2c_set_clientdata(new_client, data);
	357	data->valid = 0;
	358
	359	mutex_init(&data->update_lock);
	360
a5ebe668	361	/* Register sysfs hooks */
f24d548b GR	362	err = sysfs_create_group(&new_client->dev.kobj, &atxp1_group);
f24d548b GR	363	if (err)
d466a353	364	return err;
a5ebe668	365
1beeffe4 TJ	366	data->hwmon_dev = hwmon_device_register(&new_client->dev);
	367	if (IS_ERR(data->hwmon_dev)) {
	368	err = PTR_ERR(data->hwmon_dev);
a5ebe668	369	goto exit_remove_files;
943b0830 MH	370	}
943b0830 MH	371
9cb7d184 SW	372	dev_info(&new_client->dev, "Using VRM: %d.%d\n",
	373	data->vrm / 10, data->vrm % 10);
	374
	375	return 0;
	376
a5ebe668 JD	377	exit_remove_files:
a5ebe668 JD	378	sysfs_remove_group(&new_client->dev.kobj, &atxp1_group);
9cb7d184 SW	379	return err;
	380	};
	381
71163c7c	382	static int atxp1_remove(struct i2c_client *client)
9cb7d184	383	{
f24d548b	384	struct atxp1_data *data = i2c_get_clientdata(client);
9cb7d184	385
1beeffe4	386	hwmon_device_unregister(data->hwmon_dev);
a5ebe668	387	sysfs_remove_group(&client->dev.kobj, &atxp1_group);
943b0830	388
71163c7c	389	return 0;
9cb7d184 SW	390	};
9cb7d184 SW	391
f0967eea	392	module_i2c_driver(atxp1_driver);