[net-next-2.6.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>

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

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

	i2c_set_clientdata(new_client, data);
	data->valid = 0;

	mutex_init(&data->update_lock);

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

	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);
exit_free:
	kfree(data);
exit:
	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);

	kfree(data);

	return 0;
};

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>
9a61bf63	29	#include <linux/mutex.h>
a5ebe668	30	#include <linux/sysfs.h>
9cb7d184 SW	31
	32	MODULE_LICENSE("GPL");
	33	MODULE_DESCRIPTION("System voltages control via Attansic ATXP1");
13b3c3fa	34	MODULE_VERSION("0.6.3");
9cb7d184 SW	35	MODULE_AUTHOR("Sebastian Witt <se.witt@gmx.net>");
	36
	37	#define ATXP1_VID 0x00
	38	#define ATXP1_CVID 0x01
	39	#define ATXP1_GPIO1 0x06
	40	#define ATXP1_GPIO2 0x0a
	41	#define ATXP1_VIDENA 0x20
	42	#define ATXP1_VIDMASK 0x1f
	43	#define ATXP1_GPIO1MASK 0x0f
	44
25e9c86d	45	static const unsigned short normal_i2c[] = { 0x37, 0x4e, I2C_CLIENT_END };
9cb7d184	46
71163c7c JD	47	static int atxp1_probe(struct i2c_client *client,
	48	const struct i2c_device_id *id);
	49	static int atxp1_remove(struct i2c_client *client);
9cb7d184	50	static struct atxp1_data * atxp1_update_device(struct device *dev);
310ec792	51	static int atxp1_detect(struct i2c_client client, struct i2c_board_info info);
71163c7c JD	52
71163c7c JD	53	static const struct i2c_device_id atxp1_id[] = {
1f86df49	54	{ "atxp1", 0 },
71163c7c JD	55	{ }
	56	};
	57	MODULE_DEVICE_TABLE(i2c, atxp1_id);
9cb7d184 SW	58
9cb7d184 SW	59	static struct i2c_driver atxp1_driver = {
71163c7c	60	.class = I2C_CLASS_HWMON,
cdaf7934	61	.driver = {
cdaf7934 LR	62	.name = "atxp1",
cdaf7934 LR	63	},
71163c7c JD	64	.probe = atxp1_probe,
	65	.remove = atxp1_remove,
	66	.id_table = atxp1_id,
	67	.detect = atxp1_detect,
c3813d6a	68	.address_list = normal_i2c,
9cb7d184 SW	69	};
	70
	71	struct atxp1_data {
1beeffe4	72	struct device *hwmon_dev;
9a61bf63	73	struct mutex update_lock;
9cb7d184 SW	74	unsigned long last_updated;
	75	u8 valid;
	76	struct {
	77	u8 vid; /* VID output register */
	78	u8 cpu_vid; /* VID input from CPU */
	79	u8 gpio1; /* General purpose I/O register 1 */
	80	u8 gpio2; /* General purpose I/O register 2 */
	81	} reg;
	82	u8 vrm; /* Detected CPU VRM */
	83	};
	84
	85	static struct atxp1_data * atxp1_update_device(struct device *dev)
	86	{
	87	struct i2c_client *client;
	88	struct atxp1_data *data;
	89
	90	client = to_i2c_client(dev);
	91	data = i2c_get_clientdata(client);
	92
9a61bf63	93	mutex_lock(&data->update_lock);
9cb7d184	94
0cacdf29	95	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
9cb7d184 SW	96
	97	/* Update local register data */
	98	data->reg.vid = i2c_smbus_read_byte_data(client, ATXP1_VID);
	99	data->reg.cpu_vid = i2c_smbus_read_byte_data(client, ATXP1_CVID);
	100	data->reg.gpio1 = i2c_smbus_read_byte_data(client, ATXP1_GPIO1);
	101	data->reg.gpio2 = i2c_smbus_read_byte_data(client, ATXP1_GPIO2);
	102
	103	data->valid = 1;
	104	}
	105
9a61bf63	106	mutex_unlock(&data->update_lock);
9cb7d184 SW	107
	108	return(data);
	109	}
	110
	111	/* sys file functions for cpu0_vid */
6f637a64	112	static ssize_t atxp1_showvcore(struct device dev, struct device_attribute attr, char *buf)
9cb7d184 SW	113	{
	114	int size;
	115	struct atxp1_data *data;
	116
	117	data = atxp1_update_device(dev);
	118
	119	size = sprintf(buf, "%d\n", vid_from_reg(data->reg.vid & ATXP1_VIDMASK, data->vrm));
	120
	121	return size;
	122	}
	123
6f637a64	124	static ssize_t atxp1_storevcore(struct device dev, struct device_attribute attr, const char *buf, size_t count)
9cb7d184 SW	125	{
	126	struct atxp1_data *data;
	127	struct i2c_client *client;
c41bdb52	128	int vid, cvid;
9cb7d184 SW	129	unsigned int vcore;
	130
	131	client = to_i2c_client(dev);
	132	data = atxp1_update_device(dev);
	133
	134	vcore = simple_strtoul(buf, NULL, 10);
	135	vcore /= 25;
	136	vcore *= 25;
	137
	138	/* Calculate VID */
	139	vid = vid_to_reg(vcore, data->vrm);
	140
	141	if (vid < 0) {
	142	dev_err(dev, "VID calculation failed.\n");
	143	return -1;
	144	}
	145
	146	/* If output enabled, use control register value. Otherwise original CPU VID */
	147	if (data->reg.vid & ATXP1_VIDENA)
	148	cvid = data->reg.vid & ATXP1_VIDMASK;
	149	else
	150	cvid = data->reg.cpu_vid;
	151
	152	/* Nothing changed, aborting */
	153	if (vid == cvid)
	154	return count;
	155
164cad9b	156	dev_dbg(dev, "Setting VCore to %d mV (0x%02x)\n", vcore, vid);
9cb7d184 SW	157
	158	/* Write every 25 mV step to increase stability */
	159	if (cvid > vid) {
	160	for (; cvid >= vid; cvid--) {
	161	i2c_smbus_write_byte_data(client, ATXP1_VID, cvid \| ATXP1_VIDENA);
	162	}
	163	}
	164	else {
	165	for (; cvid <= vid; cvid++) {
	166	i2c_smbus_write_byte_data(client, ATXP1_VID, cvid \| ATXP1_VIDENA);
	167	}
	168	}
	169
	170	data->valid = 0;
	171
	172	return count;
	173	}
	174
	175	/* CPU core reference voltage
	176	unit: millivolt
	177	*/
	178	static DEVICE_ATTR(cpu0_vid, S_IRUGO \| S_IWUSR, atxp1_showvcore, atxp1_storevcore);
	179
	180	/* sys file functions for GPIO1 */
6f637a64	181	static ssize_t atxp1_showgpio1(struct device dev, struct device_attribute attr, char *buf)
9cb7d184 SW	182	{
	183	int size;
	184	struct atxp1_data *data;
	185
	186	data = atxp1_update_device(dev);
	187
	188	size = sprintf(buf, "0x%02x\n", data->reg.gpio1 & ATXP1_GPIO1MASK);
	189
	190	return size;
	191	}
	192
6f637a64	193	static ssize_t atxp1_storegpio1(struct device dev, struct device_attribute attr, const char*buf, size_t count)
9cb7d184 SW	194	{
	195	struct atxp1_data *data;
	196	struct i2c_client *client;
	197	unsigned int value;
	198
	199	client = to_i2c_client(dev);
	200	data = atxp1_update_device(dev);
	201
	202	value = simple_strtoul(buf, NULL, 16);
	203
	204	value &= ATXP1_GPIO1MASK;
	205
	206	if (value != (data->reg.gpio1 & ATXP1_GPIO1MASK)) {
	207	dev_info(dev, "Writing 0x%x to GPIO1.\n", value);
	208
	209	i2c_smbus_write_byte_data(client, ATXP1_GPIO1, value);
	210
	211	data->valid = 0;
	212	}
	213
	214	return count;
	215	}
	216
	217	/* GPIO1 data register
	218	unit: Four bit as hex (e.g. 0x0f)
	219	*/
	220	static DEVICE_ATTR(gpio1, S_IRUGO \| S_IWUSR, atxp1_showgpio1, atxp1_storegpio1);
	221
	222	/* sys file functions for GPIO2 */
6f637a64	223	static ssize_t atxp1_showgpio2(struct device dev, struct device_attribute attr, char *buf)
9cb7d184 SW	224	{
	225	int size;
	226	struct atxp1_data *data;
	227
	228	data = atxp1_update_device(dev);
	229
	230	size = sprintf(buf, "0x%02x\n", data->reg.gpio2);
	231
	232	return size;
	233	}
	234
6f637a64	235	static ssize_t atxp1_storegpio2(struct device dev, struct device_attribute attr, const char *buf, size_t count)
9cb7d184 SW	236	{
	237	struct atxp1_data *data;
	238	struct i2c_client *client;
	239	unsigned int value;
	240
	241	client = to_i2c_client(dev);
	242	data = atxp1_update_device(dev);
	243
	244	value = simple_strtoul(buf, NULL, 16) & 0xff;
	245
	246	if (value != data->reg.gpio2) {
	247	dev_info(dev, "Writing 0x%x to GPIO1.\n", value);
	248
	249	i2c_smbus_write_byte_data(client, ATXP1_GPIO2, value);
	250
	251	data->valid = 0;
	252	}
	253
	254	return count;
	255	}
	256
	257	/* GPIO2 data register
	258	unit: Eight bit as hex (e.g. 0xff)
	259	*/
	260	static DEVICE_ATTR(gpio2, S_IRUGO \| S_IWUSR, atxp1_showgpio2, atxp1_storegpio2);
	261
a5ebe668 JD	262	static struct attribute *atxp1_attributes[] = {
	263	&dev_attr_gpio1.attr,
	264	&dev_attr_gpio2.attr,
	265	&dev_attr_cpu0_vid.attr,
	266	NULL
	267	};
	268
	269	static const struct attribute_group atxp1_group = {
	270	.attrs = atxp1_attributes,
	271	};
	272
9cb7d184	273
71163c7c	274	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	275	static int atxp1_detect(struct i2c_client *new_client,
71163c7c	276	struct i2c_board_info *info)
9cb7d184	277	{
71163c7c	278	struct i2c_adapter *adapter = new_client->adapter;
9cb7d184	279
9cb7d184 SW	280	u8 temp;
	281
	282	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
71163c7c	283	return -ENODEV;
9cb7d184 SW	284
	285	/* Detect ATXP1, checking if vendor ID registers are all zero */
	286	if (!((i2c_smbus_read_byte_data(new_client, 0x3e) == 0) &&
	287	(i2c_smbus_read_byte_data(new_client, 0x3f) == 0) &&
	288	(i2c_smbus_read_byte_data(new_client, 0xfe) == 0) &&
13b3c3fa JD	289	(i2c_smbus_read_byte_data(new_client, 0xff) == 0)))
13b3c3fa JD	290	return -ENODEV;
9cb7d184	291
13b3c3fa JD	292	/* No vendor ID, now checking if registers 0x10,0x11 (non-existent)
	293	* showing the same as register 0x00 */
	294	temp = i2c_smbus_read_byte_data(new_client, 0x00);
9cb7d184	295
13b3c3fa JD	296	if (!((i2c_smbus_read_byte_data(new_client, 0x10) == temp) &&
	297	(i2c_smbus_read_byte_data(new_client, 0x11) == temp)))
	298	return -ENODEV;
9cb7d184 SW	299
9cb7d184 SW	300	/* Get VRM */
71163c7c	301	temp = vid_which_vrm();
9cb7d184	302
71163c7c JD	303	if ((temp != 90) && (temp != 91)) {
	304	dev_err(&adapter->dev, "atxp1: Not supporting VRM %d.%d\n",
	305	temp / 10, temp % 10);
	306	return -ENODEV;
9cb7d184 SW	307	}
9cb7d184 SW	308
71163c7c	309	strlcpy(info->type, "atxp1", I2C_NAME_SIZE);
9cb7d184	310
71163c7c JD	311	return 0;
71163c7c JD	312	}
9cb7d184	313
71163c7c JD	314	static int atxp1_probe(struct i2c_client *new_client,
	315	const struct i2c_device_id *id)
	316	{
	317	struct atxp1_data *data;
	318	int err;
9cb7d184	319
71163c7c JD	320	data = kzalloc(sizeof(struct atxp1_data), GFP_KERNEL);
	321	if (!data) {
	322	err = -ENOMEM;
	323	goto exit;
9cb7d184 SW	324	}
9cb7d184 SW	325
71163c7c JD	326	/* Get VRM */
	327	data->vrm = vid_which_vrm();
	328
	329	i2c_set_clientdata(new_client, data);
	330	data->valid = 0;
	331
	332	mutex_init(&data->update_lock);
	333
a5ebe668 JD	334	/* Register sysfs hooks */
a5ebe668 JD	335	if ((err = sysfs_create_group(&new_client->dev.kobj, &atxp1_group)))
71163c7c	336	goto exit_free;
a5ebe668	337
1beeffe4 TJ	338	data->hwmon_dev = hwmon_device_register(&new_client->dev);
	339	if (IS_ERR(data->hwmon_dev)) {
	340	err = PTR_ERR(data->hwmon_dev);
a5ebe668	341	goto exit_remove_files;
943b0830 MH	342	}
943b0830 MH	343
9cb7d184 SW	344	dev_info(&new_client->dev, "Using VRM: %d.%d\n",
	345	data->vrm / 10, data->vrm % 10);
	346
	347	return 0;
	348
a5ebe668 JD	349	exit_remove_files:
a5ebe668 JD	350	sysfs_remove_group(&new_client->dev.kobj, &atxp1_group);
9cb7d184 SW	351	exit_free:
	352	kfree(data);
	353	exit:
	354	return err;
	355	};
	356
71163c7c	357	static int atxp1_remove(struct i2c_client *client)
9cb7d184	358	{
943b0830	359	struct atxp1_data * data = i2c_get_clientdata(client);
9cb7d184	360
1beeffe4	361	hwmon_device_unregister(data->hwmon_dev);
a5ebe668	362	sysfs_remove_group(&client->dev.kobj, &atxp1_group);
943b0830	363
71163c7c	364	kfree(data);
9cb7d184	365
71163c7c	366	return 0;
9cb7d184 SW	367	};
	368
	369	static int __init atxp1_init(void)
	370	{
	371	return i2c_add_driver(&atxp1_driver);
	372	};
	373
	374	static void __exit atxp1_exit(void)
	375	{
	376	i2c_del_driver(&atxp1_driver);
	377	};
	378
	379	module_init(atxp1_init);
	380	module_exit(atxp1_exit);