[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>

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("System voltages control via Attansic ATXP1");
MODULE_VERSION("0.6.2");
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 unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };

I2C_CLIENT_INSMOD_1(atxp1);

static int atxp1_attach_adapter(struct i2c_adapter * adapter);
static int atxp1_detach_client(struct i2c_client * client);
static struct atxp1_data * atxp1_update_device(struct device *dev);
static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind);

static struct i2c_driver atxp1_driver = {
	.owner		= THIS_MODULE,
	.name		= "atxp1",
	.flags		= I2C_DF_NOTIFY,
	.attach_adapter = atxp1_attach_adapter,
	.detach_client	= atxp1_detach_client,
};

struct atxp1_data {
	struct i2c_client client;
	struct class_device *class_dev;
	struct semaphore 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);

	down(&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;
	}

	up(&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;
	char vid;
	char cvid;
	unsigned int vcore;

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

	vcore = simple_strtoul(buf, NULL, 10);
	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", 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 int value;

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

	value = simple_strtoul(buf, NULL, 16);

	value &= ATXP1_GPIO1MASK;

	if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
		dev_info(dev, "Writing 0x%x to GPIO1.\n", 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;
	struct i2c_client *client;
	unsigned int value;

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

	value = simple_strtoul(buf, NULL, 16) & 0xff;

	if (value != data->reg.gpio2) {
		dev_info(dev, "Writing 0x%x to GPIO1.\n", 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 int atxp1_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, &atxp1_detect);
};

static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client * new_client;
	struct atxp1_data * data;
	int err = 0;
	u8 temp;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		goto exit;

	if (!(data = kzalloc(sizeof(struct atxp1_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}

	new_client = &data->client;
	i2c_set_clientdata(new_client, data);

	new_client->addr = address;
	new_client->adapter = adapter;
	new_client->driver = &atxp1_driver;
	new_client->flags = 0;

	/* 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) )) {

		/* 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) ))
			goto exit_free;
	}

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

	if ((data->vrm != 90) && (data->vrm != 91)) {
		dev_err(&new_client->dev, "Not supporting VRM %d.%d\n",
				data->vrm / 10, data->vrm % 10);
		goto exit_free;
	}

	strncpy(new_client->name, "atxp1", I2C_NAME_SIZE);

	data->valid = 0;

	init_MUTEX(&data->update_lock);

	err = i2c_attach_client(new_client);

	if (err)
	{
		dev_err(&new_client->dev, "Attach client error.\n");
		goto exit_free;
	}

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

	device_create_file(&new_client->dev, &dev_attr_gpio1);
	device_create_file(&new_client->dev, &dev_attr_gpio2);
	device_create_file(&new_client->dev, &dev_attr_cpu0_vid);

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

	return 0;

exit_detach:
	i2c_detach_client(new_client);
exit_free:
	kfree(data);
exit:
	return err;
};

static int atxp1_detach_client(struct i2c_client * client)
{
	struct atxp1_data * data = i2c_get_clientdata(client);
	int err;

	hwmon_device_unregister(data->class_dev);

	err = i2c_detach_client(client);

	if (err)
		dev_err(&client->dev, "Failed to detach client.\n");
	else
		kfree(data);

	return err;
};

static int __init atxp1_init(void)
{
	return i2c_add_driver(&atxp1_driver);
};

static void __exit atxp1_exit(void)
{
	i2c_del_driver(&atxp1_driver);
};

module_init(atxp1_init);
module_exit(atxp1_exit);
Commit	Line	Data
9cb7d184 SW	1	/*
	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	*/
	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>
9cb7d184 SW	29
	30	MODULE_LICENSE("GPL");
	31	MODULE_DESCRIPTION("System voltages control via Attansic ATXP1");
	32	MODULE_VERSION("0.6.2");
	33	MODULE_AUTHOR("Sebastian Witt <se.witt@gmx.net>");
	34
	35	#define ATXP1_VID 0x00
	36	#define ATXP1_CVID 0x01
	37	#define ATXP1_GPIO1 0x06
	38	#define ATXP1_GPIO2 0x0a
	39	#define ATXP1_VIDENA 0x20
	40	#define ATXP1_VIDMASK 0x1f
	41	#define ATXP1_GPIO1MASK 0x0f
	42
	43	static unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };
9cb7d184	44
f4b50261	45	I2C_CLIENT_INSMOD_1(atxp1);
9cb7d184 SW	46
	47	static int atxp1_attach_adapter(struct i2c_adapter * adapter);
	48	static int atxp1_detach_client(struct i2c_client * client);
	49	static struct atxp1_data * atxp1_update_device(struct device *dev);
	50	static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind);
	51
	52	static struct i2c_driver atxp1_driver = {
	53	.owner = THIS_MODULE,
	54	.name = "atxp1",
	55	.flags = I2C_DF_NOTIFY,
	56	.attach_adapter = atxp1_attach_adapter,
	57	.detach_client = atxp1_detach_client,
	58	};
	59
	60	struct atxp1_data {
	61	struct i2c_client client;
943b0830	62	struct class_device *class_dev;
9cb7d184 SW	63	struct semaphore update_lock;
	64	unsigned long last_updated;
	65	u8 valid;
	66	struct {
	67	u8 vid; /* VID output register */
	68	u8 cpu_vid; /* VID input from CPU */
	69	u8 gpio1; /* General purpose I/O register 1 */
	70	u8 gpio2; /* General purpose I/O register 2 */
	71	} reg;
	72	u8 vrm; /* Detected CPU VRM */
	73	};
	74
	75	static struct atxp1_data * atxp1_update_device(struct device *dev)
	76	{
	77	struct i2c_client *client;
	78	struct atxp1_data *data;
	79
	80	client = to_i2c_client(dev);
	81	data = i2c_get_clientdata(client);
	82
	83	down(&data->update_lock);
	84
0cacdf29	85	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
9cb7d184 SW	86
	87	/* Update local register data */
	88	data->reg.vid = i2c_smbus_read_byte_data(client, ATXP1_VID);
	89	data->reg.cpu_vid = i2c_smbus_read_byte_data(client, ATXP1_CVID);
	90	data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
	91	data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
	92
	93	data->valid = 1;
	94	}
	95
	96	up(&data->update_lock);
	97
	98	return(data);
	99	}
	100
	101	/* sys file functions for cpu0_vid */
6f637a64	102	static ssize_t atxp1_showvcore(struct device dev, struct device_attribute attr, char *buf)
9cb7d184 SW	103	{
	104	int size;
	105	struct atxp1_data *data;
	106
	107	data = atxp1_update_device(dev);
	108
	109	size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK, data->vrm));
	110
	111	return size;
	112	}
	113
6f637a64	114	static ssize_t atxp1_storevcore(struct device dev, struct device_attribute attr, const char *buf, size_t count)
9cb7d184 SW	115	{
	116	struct atxp1_data *data;
	117	struct i2c_client *client;
	118	char vid;
	119	char cvid;
	120	unsigned int vcore;
	121
	122	client = to_i2c_client(dev);
	123	data = atxp1_update_device(dev);
	124
	125	vcore = simple_strtoul(buf, NULL, 10);
	126	vcore /= 25;
	127	vcore *= 25;
	128
	129	/* Calculate VID */
	130	vid = vid_to_reg(vcore, data->vrm);
	131
	132	if (vid < 0) {
	133	dev_err(dev, "VID calculation failed.\n");
	134	return -1;
	135	}
	136
	137	/* If output enabled, use control register value. Otherwise original CPU VID */
	138	if (data->reg.vid & ATXP1_VIDENA)
	139	cvid = data->reg.vid & ATXP1_VIDMASK;
	140	else
	141	cvid = data->reg.cpu_vid;
	142
	143	/* Nothing changed, aborting */
	144	if (vid == cvid)
	145	return count;
	146
164cad9b	147	dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", vcore, vid);
9cb7d184 SW	148
	149	/* Write every 25 mV step to increase stability */
	150	if (cvid > vid) {
	151	for (; cvid >= vid; cvid--) {
	152	i2c_smbus_write_byte_data(client, ATXP1_VID, cvid \| ATXP1_VIDENA);
	153	}
	154	}
	155	else {
	156	for (; cvid <= vid; cvid++) {
	157	i2c_smbus_write_byte_data(client, ATXP1_VID, cvid \| ATXP1_VIDENA);
	158	}
	159	}
	160
	161	data->valid = 0;
	162
	163	return count;
	164	}
	165
	166	/* CPU core reference voltage
	167	unit: millivolt
	168	*/
	169	static DEVICE_ATTR(cpu0_vid, S_IRUGO \| S_IWUSR, atxp1_showvcore, atxp1_storevcore);
	170
	171	/* sys file functions for GPIO1 */
6f637a64	172	static ssize_t atxp1_showgpio1(struct device dev, struct device_attribute attr, char *buf)
9cb7d184 SW	173	{
	174	int size;
	175	struct atxp1_data *data;
	176
	177	data = atxp1_update_device(dev);
	178
	179	size = sprintf(buf, "0x%02x\n", data->reg.gpio1 & ATXP1_GPIO1MASK);
	180
	181	return size;
	182	}
	183
6f637a64	184	static ssize_t atxp1_storegpio1(struct device dev, struct device_attribute attr, const char*buf, size_t count)
9cb7d184 SW	185	{
	186	struct atxp1_data *data;
	187	struct i2c_client *client;
	188	unsigned int value;
	189
	190	client = to_i2c_client(dev);
	191	data = atxp1_update_device(dev);
	192
	193	value = simple_strtoul(buf, NULL, 16);
	194
	195	value &= ATXP1_GPIO1MASK;
	196
	197	if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
	198	dev_info(dev, "Writing 0x%x to GPIO1.\n", value);
	199
	200	i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
	201
	202	data->valid = 0;
	203	}
	204
	205	return count;
	206	}
	207
	208	/* GPIO1 data register
	209	unit: Four bit as hex (e.g. 0x0f)
	210	*/
	211	static DEVICE_ATTR(gpio1, S_IRUGO \| S_IWUSR, atxp1_showgpio1, atxp1_storegpio1);
	212
	213	/* sys file functions for GPIO2 */
6f637a64	214	static ssize_t atxp1_showgpio2(struct device dev, struct device_attribute attr, char *buf)
9cb7d184 SW	215	{
	216	int size;
	217	struct atxp1_data *data;
	218
	219	data = atxp1_update_device(dev);
	220
	221	size = sprintf(buf, "0x%02x\n", data->reg.gpio2);
	222
	223	return size;
	224	}
	225
6f637a64	226	static ssize_t atxp1_storegpio2(struct device dev, struct device_attribute attr, const char *buf, size_t count)
9cb7d184 SW	227	{
	228	struct atxp1_data *data;
	229	struct i2c_client *client;
	230	unsigned int value;
	231
	232	client = to_i2c_client(dev);
	233	data = atxp1_update_device(dev);
	234
	235	value = simple_strtoul(buf, NULL, 16) & 0xff;
	236
	237	if (value != data->reg.gpio2) {
	238	dev_info(dev, "Writing 0x%x to GPIO1.\n", value);
	239
	240	i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
	241
	242	data->valid = 0;
	243	}
	244
	245	return count;
	246	}
	247
	248	/* GPIO2 data register
	249	unit: Eight bit as hex (e.g. 0xff)
	250	*/
	251	static DEVICE_ATTR(gpio2, S_IRUGO \| S_IWUSR, atxp1_showgpio2, atxp1_storegpio2);
	252
	253
	254	static int atxp1_attach_adapter(struct i2c_adapter *adapter)
	255	{
ddec748f JD	256	if (!(adapter->class & I2C_CLASS_HWMON))
ddec748f JD	257	return 0;
2ed2dc3c	258	return i2c_probe(adapter, &addr_data, &atxp1_detect);
9cb7d184 SW	259	};
	260
	261	static int atxp1_detect(struct i2c_adapter *adapter, int address, int kind)
	262	{
	263	struct i2c_client * new_client;
	264	struct atxp1_data * data;
	265	int err = 0;
	266	u8 temp;
	267
	268	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	269	goto exit;
	270
ba9c2e8d	271	if (!(data = kzalloc(sizeof(struct atxp1_data), GFP_KERNEL))) {
9cb7d184 SW	272	err = -ENOMEM;
	273	goto exit;
	274	}
	275
9cb7d184 SW	276	new_client = &data->client;
	277	i2c_set_clientdata(new_client, data);
	278
	279	new_client->addr = address;
	280	new_client->adapter = adapter;
	281	new_client->driver = &atxp1_driver;
	282	new_client->flags = 0;
	283
	284	/* Detect ATXP1, checking if vendor ID registers are all zero */
	285	if (!((i2c_smbus_read_byte_data(new_client, 0x3e) == 0) &&
	286	(i2c_smbus_read_byte_data(new_client, 0x3f) == 0) &&
	287	(i2c_smbus_read_byte_data(new_client, 0xfe) == 0) &&
	288	(i2c_smbus_read_byte_data(new_client, 0xff) == 0) )) {
	289
	290	/* No vendor ID, now checking if registers 0x10,0x11 (non-existent)
	291	* showing the same as register 0x00 */
	292	temp = i2c_smbus_read_byte_data(new_client, 0x00);
	293
	294	if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
	295	(i2c_smbus_read_byte_data(new_client, 0x11) == temp) ))
	296	goto exit_free;
	297	}
	298
	299	/* Get VRM */
303760b4	300	data->vrm = vid_which_vrm();
9cb7d184 SW	301
	302	if ((data->vrm != 90) && (data->vrm != 91)) {
	303	dev_err(&new_client->dev, "Not supporting VRM %d.%d\n",
	304	data->vrm / 10, data->vrm % 10);
	305	goto exit_free;
	306	}
	307
	308	strncpy(new_client->name, "atxp1", I2C_NAME_SIZE);
	309
	310	data->valid = 0;
	311
	312	init_MUTEX(&data->update_lock);
	313
	314	err = i2c_attach_client(new_client);
	315
	316	if (err)
	317	{
	318	dev_err(&new_client->dev, "Attach client error.\n");
	319	goto exit_free;
	320	}
	321
943b0830 MH	322	data->class_dev = hwmon_device_register(&new_client->dev);
	323	if (IS_ERR(data->class_dev)) {
	324	err = PTR_ERR(data->class_dev);
	325	goto exit_detach;
	326	}
	327
9cb7d184 SW	328	device_create_file(&new_client->dev, &dev_attr_gpio1);
	329	device_create_file(&new_client->dev, &dev_attr_gpio2);
	330	device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
	331
	332	dev_info(&new_client->dev, "Using VRM: %d.%d\n",
	333	data->vrm / 10, data->vrm % 10);
	334
	335	return 0;
	336
943b0830 MH	337	exit_detach:
943b0830 MH	338	i2c_detach_client(new_client);
9cb7d184 SW	339	exit_free:
	340	kfree(data);
	341	exit:
	342	return err;
	343	};
	344
	345	static int atxp1_detach_client(struct i2c_client * client)
	346	{
943b0830	347	struct atxp1_data * data = i2c_get_clientdata(client);
9cb7d184 SW	348	int err;
9cb7d184 SW	349
943b0830 MH	350	hwmon_device_unregister(data->class_dev);
943b0830 MH	351
9cb7d184 SW	352	err = i2c_detach_client(client);
	353
	354	if (err)
	355	dev_err(&client->dev, "Failed to detach client.\n");
	356	else
943b0830	357	kfree(data);
9cb7d184 SW	358
	359	return err;
	360	};
	361
	362	static int __init atxp1_init(void)
	363	{
	364	return i2c_add_driver(&atxp1_driver);
	365	};
	366
	367	static void __exit atxp1_exit(void)
	368	{
	369	i2c_del_driver(&atxp1_driver);
	370	};
	371
	372	module_init(atxp1_init);
	373	module_exit(atxp1_exit);