[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / rtc / rtc-pcf8563.c

/*
 * An I2C driver for the Philips PCF8563 RTC
 * Copyright 2005-06 Tower Technologies
 *
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 * Maintainers: http://www.nslu2-linux.org/
 *
 * based on the other drivers in this same directory.
 *
 * http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/i2c.h>
#include <linux/bcd.h>
#include <linux/rtc.h>

#define DRV_VERSION "0.4.2"

/* Addresses to scan: none
 * This chip cannot be reliably autodetected. An empty eeprom
 * located at 0x51 will pass the validation routine due to
 * the way the registers are implemented.
 */
static unsigned short normal_i2c[] = { I2C_CLIENT_END };

/* Module parameters */
I2C_CLIENT_INSMOD;

#define PCF8563_REG_ST1		0x00 /* status */
#define PCF8563_REG_ST2		0x01

#define PCF8563_REG_SC		0x02 /* datetime */
#define PCF8563_REG_MN		0x03
#define PCF8563_REG_HR		0x04
#define PCF8563_REG_DM		0x05
#define PCF8563_REG_DW		0x06
#define PCF8563_REG_MO		0x07
#define PCF8563_REG_YR		0x08

#define PCF8563_REG_AMN		0x09 /* alarm */
#define PCF8563_REG_AHR		0x0A
#define PCF8563_REG_ADM		0x0B
#define PCF8563_REG_ADW		0x0C

#define PCF8563_REG_CLKO	0x0D /* clock out */
#define PCF8563_REG_TMRC	0x0E /* timer control */
#define PCF8563_REG_TMR		0x0F /* timer */

#define PCF8563_SC_LV		0x80 /* low voltage */
#define PCF8563_MO_C		0x80 /* century */

static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
static int pcf8563_detach(struct i2c_client *client);

/*
 * In the routines that deal directly with the pcf8563 hardware, we use
 * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
 */
static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
{
	unsigned char buf[13] = { PCF8563_REG_ST1 };

	struct i2c_msg msgs[] = {
		{ client->addr, 0, 1, buf },	/* setup read ptr */
		{ client->addr, I2C_M_RD, 13, buf },	/* read status + date */
	};

	/* read registers */
	if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
		dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
		return -EIO;
	}

	if (buf[PCF8563_REG_SC] & PCF8563_SC_LV)
		dev_info(&client->dev,
			"low voltage detected, date/time is not reliable.\n");

	dev_dbg(&client->dev,
		"%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, "
		"mday=%02x, wday=%02x, mon=%02x, year=%02x\n",
		__FUNCTION__,
		buf[0], buf[1], buf[2], buf[3],
		buf[4], buf[5], buf[6], buf[7],
		buf[8]);


	tm->tm_sec = BCD2BIN(buf[PCF8563_REG_SC] & 0x7F);
	tm->tm_min = BCD2BIN(buf[PCF8563_REG_MN] & 0x7F);
	tm->tm_hour = BCD2BIN(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */
	tm->tm_mday = BCD2BIN(buf[PCF8563_REG_DM] & 0x3F);
	tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
	tm->tm_mon = BCD2BIN(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
	tm->tm_year = BCD2BIN(buf[PCF8563_REG_YR])
		+ (buf[PCF8563_REG_MO] & PCF8563_MO_C ? 0 : 100);

	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
		"mday=%d, mon=%d, year=%d, wday=%d\n",
		__FUNCTION__,
		tm->tm_sec, tm->tm_min, tm->tm_hour,
		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);

	/* the clock can give out invalid datetime, but we cannot return
	 * -EINVAL otherwise hwclock will refuse to set the time on bootup.
	 */
	if (rtc_valid_tm(tm) < 0)
		dev_err(&client->dev, "retrieved date/time is not valid.\n");

	return 0;
}

static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm)
{
	int i, err;
	unsigned char buf[9];

	dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
		"mday=%d, mon=%d, year=%d, wday=%d\n",
		__FUNCTION__,
		tm->tm_sec, tm->tm_min, tm->tm_hour,
		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);

	/* hours, minutes and seconds */
	buf[PCF8563_REG_SC] = BIN2BCD(tm->tm_sec);
	buf[PCF8563_REG_MN] = BIN2BCD(tm->tm_min);
	buf[PCF8563_REG_HR] = BIN2BCD(tm->tm_hour);

	buf[PCF8563_REG_DM] = BIN2BCD(tm->tm_mday);

	/* month, 1 - 12 */
	buf[PCF8563_REG_MO] = BIN2BCD(tm->tm_mon + 1);

	/* year and century */
	buf[PCF8563_REG_YR] = BIN2BCD(tm->tm_year % 100);
	if (tm->tm_year < 100)
		buf[PCF8563_REG_MO] |= PCF8563_MO_C;

	buf[PCF8563_REG_DW] = tm->tm_wday & 0x07;

	/* write register's data */
	for (i = 0; i < 7; i++) {
		unsigned char data[2] = { PCF8563_REG_SC + i,
						buf[PCF8563_REG_SC + i] };

		err = i2c_master_send(client, data, sizeof(data));
		if (err != sizeof(data)) {
			dev_err(&client->dev,
				"%s: err=%d addr=%02x, data=%02x\n",
				__FUNCTION__, err, data[0], data[1]);
			return -EIO;
		}
	};

	return 0;
}

struct pcf8563_limit
{
	unsigned char reg;
	unsigned char mask;
	unsigned char min;
	unsigned char max;
};

static int pcf8563_validate_client(struct i2c_client *client)
{
	int i;

	static const struct pcf8563_limit pattern[] = {
		/* register, mask, min, max */
		{ PCF8563_REG_SC,	0x7F,	0,	59	},
		{ PCF8563_REG_MN,	0x7F,	0,	59	},
		{ PCF8563_REG_HR,	0x3F,	0,	23	},
		{ PCF8563_REG_DM,	0x3F,	0,	31	},
		{ PCF8563_REG_MO,	0x1F,	0,	12	},
	};

	/* check limits (only registers with bcd values) */
	for (i = 0; i < ARRAY_SIZE(pattern); i++) {
		int xfer;
		unsigned char value;
		unsigned char buf = pattern[i].reg;

		struct i2c_msg msgs[] = {
			{ client->addr, 0, 1, &buf },
			{ client->addr, I2C_M_RD, 1, &buf },
		};

		xfer = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));

		if (xfer != ARRAY_SIZE(msgs)) {
			dev_err(&client->adapter->dev,
				"%s: could not read register 0x%02X\n",
				__FUNCTION__, pattern[i].reg);

			return -EIO;
		}

		value = BCD2BIN(buf & pattern[i].mask);

		if (value > pattern[i].max ||
			value < pattern[i].min) {
			dev_dbg(&client->adapter->dev,
				"%s: pattern=%d, reg=%x, mask=0x%02x, min=%d, "
				"max=%d, value=%d, raw=0x%02X\n",
				__FUNCTION__, i, pattern[i].reg, pattern[i].mask,
				pattern[i].min, pattern[i].max,
				value, buf);

			return -ENODEV;
		}
	}

	return 0;
}

static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
	return pcf8563_get_datetime(to_i2c_client(dev), tm);
}

static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	return pcf8563_set_datetime(to_i2c_client(dev), tm);
}

static const struct rtc_class_ops pcf8563_rtc_ops = {
	.read_time	= pcf8563_rtc_read_time,
	.set_time	= pcf8563_rtc_set_time,
};

static int pcf8563_attach(struct i2c_adapter *adapter)
{
	return i2c_probe(adapter, &addr_data, pcf8563_probe);
}

static struct i2c_driver pcf8563_driver = {
	.driver		= {
		.name	= "pcf8563",
	},
	.id		= I2C_DRIVERID_PCF8563,
	.attach_adapter = &pcf8563_attach,
	.detach_client	= &pcf8563_detach,
};

static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *client;
	struct rtc_device *rtc;

	int err = 0;

	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);

	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
		err = -ENODEV;
		goto exit;
	}

	if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}

	client->addr = address;
	client->driver = &pcf8563_driver;
	client->adapter	= adapter;

	strlcpy(client->name, pcf8563_driver.driver.name, I2C_NAME_SIZE);

	/* Verify the chip is really an PCF8563 */
	if (kind < 0) {
		if (pcf8563_validate_client(client) < 0) {
			err = -ENODEV;
			goto exit_kfree;
		}
	}

	/* Inform the i2c layer */
	if ((err = i2c_attach_client(client)))
		goto exit_kfree;

	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");

	rtc = rtc_device_register(pcf8563_driver.driver.name, &client->dev,
				&pcf8563_rtc_ops, THIS_MODULE);

	if (IS_ERR(rtc)) {
		err = PTR_ERR(rtc);
		goto exit_detach;
	}

	i2c_set_clientdata(client, rtc);

	return 0;

exit_detach:
	i2c_detach_client(client);

exit_kfree:
	kfree(client);

exit:
	return err;
}

static int pcf8563_detach(struct i2c_client *client)
{
	int err;
	struct rtc_device *rtc = i2c_get_clientdata(client);

	if (rtc)
		rtc_device_unregister(rtc);

	if ((err = i2c_detach_client(client)))
		return err;

	kfree(client);

	return 0;
}

static int __init pcf8563_init(void)
{
	return i2c_add_driver(&pcf8563_driver);
}

static void __exit pcf8563_exit(void)
{
	i2c_del_driver(&pcf8563_driver);
}

MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

module_init(pcf8563_init);
module_exit(pcf8563_exit);
Commit	Line	Data
b5a82d62 AZ	1	/*
	2	* An I2C driver for the Philips PCF8563 RTC
	3	* Copyright 2005-06 Tower Technologies
	4	*
	5	* Author: Alessandro Zummo <a.zummo@towertech.it>
	6	* Maintainers: http://www.nslu2-linux.org/
	7	*
	8	* based on the other drivers in this same directory.
	9	*
	10	* http://www.semiconductors.philips.com/acrobat/datasheets/PCF8563-04.pdf
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License version 2 as
	14	* published by the Free Software Foundation.
	15	*/
	16
	17	#include <linux/i2c.h>
	18	#include <linux/bcd.h>
	19	#include <linux/rtc.h>
	20
	21	#define DRV_VERSION "0.4.2"
	22
	23	/* Addresses to scan: none
	24	* This chip cannot be reliably autodetected. An empty eeprom
	25	* located at 0x51 will pass the validation routine due to
	26	* the way the registers are implemented.
	27	*/
	28	static unsigned short normal_i2c[] = { I2C_CLIENT_END };
	29
	30	/* Module parameters */
	31	I2C_CLIENT_INSMOD;
	32
	33	#define PCF8563_REG_ST1 0x00 /* status */
	34	#define PCF8563_REG_ST2 0x01
	35
	36	#define PCF8563_REG_SC 0x02 /* datetime */
	37	#define PCF8563_REG_MN 0x03
	38	#define PCF8563_REG_HR 0x04
	39	#define PCF8563_REG_DM 0x05
	40	#define PCF8563_REG_DW 0x06
	41	#define PCF8563_REG_MO 0x07
	42	#define PCF8563_REG_YR 0x08
	43
	44	#define PCF8563_REG_AMN 0x09 /* alarm */
	45	#define PCF8563_REG_AHR 0x0A
	46	#define PCF8563_REG_ADM 0x0B
	47	#define PCF8563_REG_ADW 0x0C
	48
	49	#define PCF8563_REG_CLKO 0x0D /* clock out */
	50	#define PCF8563_REG_TMRC 0x0E /* timer control */
	51	#define PCF8563_REG_TMR 0x0F /* timer */
	52
	53	#define PCF8563_SC_LV 0x80 /* low voltage */
	54	#define PCF8563_MO_C 0x80 /* century */
	55
	56	static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
	57	static int pcf8563_detach(struct i2c_client *client);
	58
	59	/*
	60	* In the routines that deal directly with the pcf8563 hardware, we use
	61	* rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
	62	*/
	63	static int pcf8563_get_datetime(struct i2c_client client, struct rtc_time tm)
	64	{
65	unsigned char buf[13] = { PCF8563_REG_ST1 };
66
67	struct i2c_msg msgs[] = {
68	{ client->addr, 0, 1, buf }, /* setup read ptr */
69	{ client->addr, I2C_M_RD, 13, buf }, /* read status + date */
70	};
71
72	/* read registers */
73	if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
74	dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
75	return -EIO;
76	}
77
78	if (buf[PCF8563_REG_SC] & PCF8563_SC_LV)
79	dev_info(&client->dev,
80	"low voltage detected, date/time is not reliable.\n");
81
82	dev_dbg(&client->dev,
83	"%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, "
84	"mday=%02x, wday=%02x, mon=%02x, year=%02x\n",
85	__FUNCTION__,
86	buf[0], buf[1], buf[2], buf[3],
87	buf[4], buf[5], buf[6], buf[7],
88	buf[8]);
89
90
91	tm->tm_sec = BCD2BIN(buf[PCF8563_REG_SC] & 0x7F);
92	tm->tm_min = BCD2BIN(buf[PCF8563_REG_MN] & 0x7F);
93	tm->tm_hour = BCD2BIN(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */
94	tm->tm_mday = BCD2BIN(buf[PCF8563_REG_DM] & 0x3F);
95	tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
96	tm->tm_mon = BCD2BIN(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
97	tm->tm_year = BCD2BIN(buf[PCF8563_REG_YR])
1713e903	98	+ (buf[PCF8563_REG_MO] & PCF8563_MO_C ? 0 : 100);
b5a82d62 AZ	99
	100	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
	101	"mday=%d, mon=%d, year=%d, wday=%d\n",
	102	__FUNCTION__,
	103	tm->tm_sec, tm->tm_min, tm->tm_hour,
	104	tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
	105
	106	/* the clock can give out invalid datetime, but we cannot return
	107	* -EINVAL otherwise hwclock will refuse to set the time on bootup.
	108	*/
	109	if (rtc_valid_tm(tm) < 0)
	110	dev_err(&client->dev, "retrieved date/time is not valid.\n");
	111
	112	return 0;
	113	}
	114
	115	static int pcf8563_set_datetime(struct i2c_client client, struct rtc_time tm)
	116	{
	117	int i, err;
	118	unsigned char buf[9];
	119
	120	dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
	121	"mday=%d, mon=%d, year=%d, wday=%d\n",
	122	__FUNCTION__,
	123	tm->tm_sec, tm->tm_min, tm->tm_hour,
	124	tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
	125
	126	/* hours, minutes and seconds */
	127	buf[PCF8563_REG_SC] = BIN2BCD(tm->tm_sec);
	128	buf[PCF8563_REG_MN] = BIN2BCD(tm->tm_min);
	129	buf[PCF8563_REG_HR] = BIN2BCD(tm->tm_hour);
	130
	131	buf[PCF8563_REG_DM] = BIN2BCD(tm->tm_mday);
	132
	133	/* month, 1 - 12 */
	134	buf[PCF8563_REG_MO] = BIN2BCD(tm->tm_mon + 1);
	135
	136	/* year and century */
	137	buf[PCF8563_REG_YR] = BIN2BCD(tm->tm_year % 100);
1713e903	138	if (tm->tm_year < 100)
b5a82d62 AZ	139	buf[PCF8563_REG_MO] \|= PCF8563_MO_C;
	140
	141	buf[PCF8563_REG_DW] = tm->tm_wday & 0x07;
	142
	143	/* write register's data */
	144	for (i = 0; i < 7; i++) {
	145	unsigned char data[2] = { PCF8563_REG_SC + i,
	146	buf[PCF8563_REG_SC + i] };
	147
	148	err = i2c_master_send(client, data, sizeof(data));
	149	if (err != sizeof(data)) {
	150	dev_err(&client->dev,
	151	"%s: err=%d addr=%02x, data=%02x\n",
	152	__FUNCTION__, err, data[0], data[1]);
	153	return -EIO;
	154	}
	155	};
	156
	157	return 0;
	158	}
	159
	160	struct pcf8563_limit
	161	{
	162	unsigned char reg;
	163	unsigned char mask;
	164	unsigned char min;
	165	unsigned char max;
	166	};
	167
	168	static int pcf8563_validate_client(struct i2c_client *client)
	169	{
	170	int i;
	171
	172	static const struct pcf8563_limit pattern[] = {
	173	/* register, mask, min, max */
	174	{ PCF8563_REG_SC, 0x7F, 0, 59 },
	175	{ PCF8563_REG_MN, 0x7F, 0, 59 },
	176	{ PCF8563_REG_HR, 0x3F, 0, 23 },
	177	{ PCF8563_REG_DM, 0x3F, 0, 31 },
	178	{ PCF8563_REG_MO, 0x1F, 0, 12 },
	179	};
	180
	181	/* check limits (only registers with bcd values) */
	182	for (i = 0; i < ARRAY_SIZE(pattern); i++) {
	183	int xfer;
	184	unsigned char value;
	185	unsigned char buf = pattern[i].reg;
	186
	187	struct i2c_msg msgs[] = {
	188	{ client->addr, 0, 1, &buf },
	189	{ client->addr, I2C_M_RD, 1, &buf },
	190	};
	191
	192	xfer = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
	193
	194	if (xfer != ARRAY_SIZE(msgs)) {
	195	dev_err(&client->adapter->dev,
	196	"%s: could not read register 0x%02X\n",
	197	__FUNCTION__, pattern[i].reg);
	198
	199	return -EIO;
	200	}
	201
	202	value = BCD2BIN(buf & pattern[i].mask);
203
204	if (value > pattern[i].max \|\|
205	value < pattern[i].min) {
206	dev_dbg(&client->adapter->dev,
207	"%s: pattern=%d, reg=%x, mask=0x%02x, min=%d, "
208	"max=%d, value=%d, raw=0x%02X\n",
209	__FUNCTION__, i, pattern[i].reg, pattern[i].mask,
210	pattern[i].min, pattern[i].max,
211	value, buf);
212
213	return -ENODEV;
214	}
215	}
216
217	return 0;
218	}
219
220	static int pcf8563_rtc_read_time(struct device dev, struct rtc_time tm)
221	{
222	return pcf8563_get_datetime(to_i2c_client(dev), tm);
223	}
224
225	static int pcf8563_rtc_set_time(struct device dev, struct rtc_time tm)
226	{
227	return pcf8563_set_datetime(to_i2c_client(dev), tm);
228	}
229
ff8371ac	230	static const struct rtc_class_ops pcf8563_rtc_ops = {
b5a82d62 AZ	231	.read_time = pcf8563_rtc_read_time,
	232	.set_time = pcf8563_rtc_set_time,
	233	};
	234
	235	static int pcf8563_attach(struct i2c_adapter *adapter)
	236	{
	237	return i2c_probe(adapter, &addr_data, pcf8563_probe);
	238	}
	239
	240	static struct i2c_driver pcf8563_driver = {
	241	.driver = {
	242	.name = "pcf8563",
	243	},
	244	.id = I2C_DRIVERID_PCF8563,
	245	.attach_adapter = &pcf8563_attach,
	246	.detach_client = &pcf8563_detach,
	247	};
	248
	249	static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
	250	{
	251	struct i2c_client *client;
	252	struct rtc_device *rtc;
	253
	254	int err = 0;
	255
	256	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
	257
	258	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
	259	err = -ENODEV;
	260	goto exit;
	261	}
	262
	263	if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
	264	err = -ENOMEM;
	265	goto exit;
	266	}
	267
	268	client->addr = address;
	269	client->driver = &pcf8563_driver;
	270	client->adapter = adapter;
	271
	272	strlcpy(client->name, pcf8563_driver.driver.name, I2C_NAME_SIZE);
	273
	274	/* Verify the chip is really an PCF8563 */
	275	if (kind < 0) {
	276	if (pcf8563_validate_client(client) < 0) {
	277	err = -ENODEV;
	278	goto exit_kfree;
	279	}
	280	}
	281
	282	/* Inform the i2c layer */
	283	if ((err = i2c_attach_client(client)))
	284	goto exit_kfree;
	285
	286	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
	287
	288	rtc = rtc_device_register(pcf8563_driver.driver.name, &client->dev,
	289	&pcf8563_rtc_ops, THIS_MODULE);
	290
	291	if (IS_ERR(rtc)) {
	292	err = PTR_ERR(rtc);
b5a82d62 AZ	293	goto exit_detach;
	294	}
	295
	296	i2c_set_clientdata(client, rtc);
	297
	298	return 0;
	299
	300	exit_detach:
	301	i2c_detach_client(client);
	302
	303	exit_kfree:
	304	kfree(client);
	305
	306	exit:
	307	return err;
	308	}
	309
	310	static int pcf8563_detach(struct i2c_client *client)
	311	{
	312	int err;
	313	struct rtc_device *rtc = i2c_get_clientdata(client);
	314
b5a82d62 AZ	315	if (rtc)
	316	rtc_device_unregister(rtc);
	317
	318	if ((err = i2c_detach_client(client)))
	319	return err;
	320
	321	kfree(client);
	322
	323	return 0;
	324	}
	325
	326	static int __init pcf8563_init(void)
	327	{
	328	return i2c_add_driver(&pcf8563_driver);
	329	}
	330
	331	static void __exit pcf8563_exit(void)
	332	{
	333	i2c_del_driver(&pcf8563_driver);
	334	}
	335
	336	MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
	337	MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver");
	338	MODULE_LICENSE("GPL");
	339	MODULE_VERSION(DRV_VERSION);
	340
	341	module_init(pcf8563_init);
	342	module_exit(pcf8563_exit);