[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>

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