[deliverable/linux.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>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/err.h>

#define DRV_VERSION "0.4.3"

#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 struct i2c_driver pcf8563_driver;

struct pcf8563 {
	struct rtc_device *rtc;
	/*
	 * The meaning of MO_C bit varies by the chip type.
	 * From PCF8563 datasheet: this bit is toggled when the years
	 * register overflows from 99 to 00
	 *   0 indicates the century is 20xx
	 *   1 indicates the century is 19xx
	 * From RTC8564 datasheet: this bit indicates change of
	 * century. When the year digit data overflows from 99 to 00,
	 * this bit is set. By presetting it to 0 while still in the
	 * 20th century, it will be set in year 2000, ...
	 * There seems no reliable way to know how the system use this
	 * bit.  So let's do it heuristically, assuming we are live in
	 * 1970...2069.
	 */
	int c_polarity;	/* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
	int voltage_low; /* incicates if a low_voltage was detected */
};

/*
 * 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)
{
	struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
	unsigned char buf[13] = { PCF8563_REG_ST1 };

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

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

	if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) {
		pcf8563->voltage_low = 1;
		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",
		__func__,
		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]);
	if (tm->tm_year < 70)
		tm->tm_year += 100;	/* assume we are in 1970...2069 */
	/* detect the polarity heuristically. see note above. */
	pcf8563->c_polarity = (buf[PCF8563_REG_MO] & PCF8563_MO_C) ?
		(tm->tm_year >= 100) : (tm->tm_year < 100);

	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
		"mday=%d, mon=%d, year=%d, wday=%d\n",
		__func__,
		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)
{
	struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
	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",
		__func__,
		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 (pcf8563->c_polarity ? (tm->tm_year >= 100) : (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",
				__func__, err, data[0], data[1]);
			return -EIO;
		}
	}

	return 0;
}

#ifdef CONFIG_RTC_INTF_DEV
static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
	struct pcf8563 *pcf8563 = i2c_get_clientdata(to_i2c_client(dev));
	struct rtc_time tm;

	switch (cmd) {
	case RTC_VL_READ:
		if (pcf8563->voltage_low)
			dev_info(dev, "low voltage detected, date/time is not reliable.\n");

		if (copy_to_user((void __user *)arg, &pcf8563->voltage_low,
					sizeof(int)))
			return -EFAULT;
		return 0;
	case RTC_VL_CLR:
		/*
		 * Clear the VL bit in the seconds register in case
		 * the time has not been set already (which would
		 * have cleared it). This does not really matter
		 * because of the cached voltage_low value but do it
		 * anyway for consistency.
		 */
		if (pcf8563_get_datetime(to_i2c_client(dev), &tm))
			pcf8563_set_datetime(to_i2c_client(dev), &tm);

		/* Clear the cached value. */
		pcf8563->voltage_low = 0;

		return 0;
	default:
		return -ENOIOCTLCMD;
	}
}
#else
#define pcf8563_rtc_ioctl NULL
#endif

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 = {
	.ioctl		= pcf8563_rtc_ioctl,
	.read_time	= pcf8563_rtc_read_time,
	.set_time	= pcf8563_rtc_set_time,
};

static int pcf8563_probe(struct i2c_client *client,
				const struct i2c_device_id *id)
{
	struct pcf8563 *pcf8563;

	dev_dbg(&client->dev, "%s\n", __func__);

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
		return -ENODEV;

	pcf8563 = devm_kzalloc(&client->dev, sizeof(struct pcf8563),
				GFP_KERNEL);
	if (!pcf8563)
		return -ENOMEM;

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

	i2c_set_clientdata(client, pcf8563);

	pcf8563->rtc = devm_rtc_device_register(&client->dev,
				pcf8563_driver.driver.name,
				&pcf8563_rtc_ops, THIS_MODULE);

	return PTR_ERR_OR_ZERO(pcf8563->rtc);
}

static const struct i2c_device_id pcf8563_id[] = {
	{ "pcf8563", 0 },
	{ "rtc8564", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, pcf8563_id);

#ifdef CONFIG_OF
static const struct of_device_id pcf8563_of_match[] = {
	{ .compatible = "nxp,pcf8563" },
	{}
};
MODULE_DEVICE_TABLE(of, pcf8563_of_match);
#endif

static struct i2c_driver pcf8563_driver = {
	.driver		= {
		.name	= "rtc-pcf8563",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(pcf8563_of_match),
	},
	.probe		= pcf8563_probe,
	.id_table	= pcf8563_id,
};

module_i2c_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);
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>
5a0e3ad6	20	#include <linux/slab.h>
2113852b	21	#include <linux/module.h>
8dccaf06	22	#include <linux/of.h>
23f809ee	23	#include <linux/err.h>
b5a82d62	24
e5fc9cc0	25	#define DRV_VERSION "0.4.3"
b5a82d62 AZ	26
	27	#define PCF8563_REG_ST1 0x00 /* status */
	28	#define PCF8563_REG_ST2 0x01
	29
	30	#define PCF8563_REG_SC 0x02 /* datetime */
	31	#define PCF8563_REG_MN 0x03
	32	#define PCF8563_REG_HR 0x04
	33	#define PCF8563_REG_DM 0x05
	34	#define PCF8563_REG_DW 0x06
	35	#define PCF8563_REG_MO 0x07
	36	#define PCF8563_REG_YR 0x08
	37
	38	#define PCF8563_REG_AMN 0x09 /* alarm */
	39	#define PCF8563_REG_AHR 0x0A
	40	#define PCF8563_REG_ADM 0x0B
	41	#define PCF8563_REG_ADW 0x0C
	42
	43	#define PCF8563_REG_CLKO 0x0D /* clock out */
	44	#define PCF8563_REG_TMRC 0x0E /* timer control */
	45	#define PCF8563_REG_TMR 0x0F /* timer */
	46
	47	#define PCF8563_SC_LV 0x80 /* low voltage */
	48	#define PCF8563_MO_C 0x80 /* century */
	49
e5fc9cc0 AZ	50	static struct i2c_driver pcf8563_driver;
e5fc9cc0 AZ	51
cbb94502	52	struct pcf8563 {
e5fc9cc0	53	struct rtc_device *rtc;
cbb94502 AN	54	/*
	55	* The meaning of MO_C bit varies by the chip type.
	56	* From PCF8563 datasheet: this bit is toggled when the years
	57	* register overflows from 99 to 00
	58	* 0 indicates the century is 20xx
	59	* 1 indicates the century is 19xx
	60	* From RTC8564 datasheet: this bit indicates change of
	61	* century. When the year digit data overflows from 99 to 00,
	62	* this bit is set. By presetting it to 0 while still in the
	63	* 20th century, it will be set in year 2000, ...
	64	* There seems no reliable way to know how the system use this
	65	* bit. So let's do it heuristically, assuming we are live in
	66	* 1970...2069.
	67	*/
	68	int c_polarity; /* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
0f20b767	69	int voltage_low; /* incicates if a low_voltage was detected */
cbb94502 AN	70	};
cbb94502 AN	71
b5a82d62 AZ	72	/*
	73	* In the routines that deal directly with the pcf8563 hardware, we use
	74	* rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
	75	*/
	76	static int pcf8563_get_datetime(struct i2c_client client, struct rtc_time tm)
	77	{
e5fc9cc0	78	struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
b5a82d62 AZ	79	unsigned char buf[13] = { PCF8563_REG_ST1 };
	80
	81	struct i2c_msg msgs[] = {
755e4a4b S	82	{/* setup read ptr */
	83	.addr = client->addr,
	84	.len = 1,
	85	.buf = buf
	86	},
	87	{/* read status + date */
	88	.addr = client->addr,
	89	.flags = I2C_M_RD,
	90	.len = 13,
	91	.buf = buf
	92	},
b5a82d62 AZ	93	};
	94
	95	/* read registers */
	96	if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
2a4e2b87	97	dev_err(&client->dev, "%s: read error\n", __func__);
b5a82d62 AZ	98	return -EIO;
	99	}
	100
0f20b767 AS	101	if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) {
0f20b767 AS	102	pcf8563->voltage_low = 1;
b5a82d62 AZ	103	dev_info(&client->dev,
b5a82d62 AZ	104	"low voltage detected, date/time is not reliable.\n");
0f20b767	105	}
b5a82d62 AZ	106
	107	dev_dbg(&client->dev,
	108	"%s: raw data is st1=%02x, st2=%02x, sec=%02x, min=%02x, hr=%02x, "
	109	"mday=%02x, wday=%02x, mon=%02x, year=%02x\n",
2a4e2b87	110	__func__,
b5a82d62 AZ	111	buf[0], buf[1], buf[2], buf[3],
	112	buf[4], buf[5], buf[6], buf[7],
	113	buf[8]);
	114
	115
fe20ba70 AB	116	tm->tm_sec = bcd2bin(buf[PCF8563_REG_SC] & 0x7F);
	117	tm->tm_min = bcd2bin(buf[PCF8563_REG_MN] & 0x7F);
	118	tm->tm_hour = bcd2bin(buf[PCF8563_REG_HR] & 0x3F); /* rtc hr 0-23 */
	119	tm->tm_mday = bcd2bin(buf[PCF8563_REG_DM] & 0x3F);
b5a82d62	120	tm->tm_wday = buf[PCF8563_REG_DW] & 0x07;
fe20ba70 AB	121	tm->tm_mon = bcd2bin(buf[PCF8563_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
fe20ba70 AB	122	tm->tm_year = bcd2bin(buf[PCF8563_REG_YR]);
cbb94502 AN	123	if (tm->tm_year < 70)
	124	tm->tm_year += 100; /* assume we are in 1970...2069 */
	125	/* detect the polarity heuristically. see note above. */
	126	pcf8563->c_polarity = (buf[PCF8563_REG_MO] & PCF8563_MO_C) ?
	127	(tm->tm_year >= 100) : (tm->tm_year < 100);
b5a82d62 AZ	128
	129	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
	130	"mday=%d, mon=%d, year=%d, wday=%d\n",
2a4e2b87	131	__func__,
b5a82d62 AZ	132	tm->tm_sec, tm->tm_min, tm->tm_hour,
	133	tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
	134
	135	/* the clock can give out invalid datetime, but we cannot return
	136	* -EINVAL otherwise hwclock will refuse to set the time on bootup.
	137	*/
	138	if (rtc_valid_tm(tm) < 0)
	139	dev_err(&client->dev, "retrieved date/time is not valid.\n");
	140
	141	return 0;
	142	}
	143
	144	static int pcf8563_set_datetime(struct i2c_client client, struct rtc_time tm)
	145	{
e5fc9cc0	146	struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
b5a82d62 AZ	147	int i, err;
	148	unsigned char buf[9];
	149
	150	dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
	151	"mday=%d, mon=%d, year=%d, wday=%d\n",
2a4e2b87	152	__func__,
b5a82d62 AZ	153	tm->tm_sec, tm->tm_min, tm->tm_hour,
	154	tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
	155
	156	/* hours, minutes and seconds */
fe20ba70 AB	157	buf[PCF8563_REG_SC] = bin2bcd(tm->tm_sec);
	158	buf[PCF8563_REG_MN] = bin2bcd(tm->tm_min);
	159	buf[PCF8563_REG_HR] = bin2bcd(tm->tm_hour);
b5a82d62	160
fe20ba70	161	buf[PCF8563_REG_DM] = bin2bcd(tm->tm_mday);
b5a82d62 AZ	162
b5a82d62 AZ	163	/* month, 1 - 12 */
fe20ba70	164	buf[PCF8563_REG_MO] = bin2bcd(tm->tm_mon + 1);
b5a82d62 AZ	165
b5a82d62 AZ	166	/* year and century */
fe20ba70	167	buf[PCF8563_REG_YR] = bin2bcd(tm->tm_year % 100);
cbb94502	168	if (pcf8563->c_polarity ? (tm->tm_year >= 100) : (tm->tm_year < 100))
b5a82d62 AZ	169	buf[PCF8563_REG_MO] \|= PCF8563_MO_C;
	170
	171	buf[PCF8563_REG_DW] = tm->tm_wday & 0x07;
	172
	173	/* write register's data */
	174	for (i = 0; i < 7; i++) {
	175	unsigned char data[2] = { PCF8563_REG_SC + i,
	176	buf[PCF8563_REG_SC + i] };
	177
	178	err = i2c_master_send(client, data, sizeof(data));
	179	if (err != sizeof(data)) {
	180	dev_err(&client->dev,
	181	"%s: err=%d addr=%02x, data=%02x\n",
2a4e2b87	182	__func__, err, data[0], data[1]);
b5a82d62 AZ	183	return -EIO;
b5a82d62 AZ	184	}
0b7e0392	185	}
b5a82d62 AZ	186
	187	return 0;
	188	}
	189
0f20b767 AS	190	#ifdef CONFIG_RTC_INTF_DEV
	191	static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
	192	{
	193	struct pcf8563 *pcf8563 = i2c_get_clientdata(to_i2c_client(dev));
	194	struct rtc_time tm;
	195
	196	switch (cmd) {
	197	case RTC_VL_READ:
	198	if (pcf8563->voltage_low)
	199	dev_info(dev, "low voltage detected, date/time is not reliable.\n");
	200
	201	if (copy_to_user((void __user *)arg, &pcf8563->voltage_low,
	202	sizeof(int)))
	203	return -EFAULT;
	204	return 0;
	205	case RTC_VL_CLR:
	206	/*
	207	* Clear the VL bit in the seconds register in case
	208	* the time has not been set already (which would
	209	* have cleared it). This does not really matter
	210	* because of the cached voltage_low value but do it
	211	* anyway for consistency.
	212	*/
	213	if (pcf8563_get_datetime(to_i2c_client(dev), &tm))
	214	pcf8563_set_datetime(to_i2c_client(dev), &tm);
	215
	216	/* Clear the cached value. */
	217	pcf8563->voltage_low = 0;
	218
	219	return 0;
	220	default:
	221	return -ENOIOCTLCMD;
	222	}
	223	}
	224	#else
	225	#define pcf8563_rtc_ioctl NULL
	226	#endif
	227
b5a82d62 AZ	228	static int pcf8563_rtc_read_time(struct device dev, struct rtc_time tm)
	229	{
	230	return pcf8563_get_datetime(to_i2c_client(dev), tm);
	231	}
	232
	233	static int pcf8563_rtc_set_time(struct device dev, struct rtc_time tm)
	234	{
	235	return pcf8563_set_datetime(to_i2c_client(dev), tm);
	236	}
	237
ff8371ac	238	static const struct rtc_class_ops pcf8563_rtc_ops = {
0f20b767	239	.ioctl = pcf8563_rtc_ioctl,
b5a82d62 AZ	240	.read_time = pcf8563_rtc_read_time,
	241	.set_time = pcf8563_rtc_set_time,
	242	};
	243
d2653e92 JD	244	static int pcf8563_probe(struct i2c_client *client,
d2653e92 JD	245	const struct i2c_device_id *id)
b5a82d62	246	{
cbb94502	247	struct pcf8563 *pcf8563;
b5a82d62	248
e5fc9cc0	249	dev_dbg(&client->dev, "%s\n", __func__);
b5a82d62	250
e5fc9cc0 AZ	251	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
e5fc9cc0 AZ	252	return -ENODEV;
b5a82d62	253
d6fbdc34 JH	254	pcf8563 = devm_kzalloc(&client->dev, sizeof(struct pcf8563),
d6fbdc34 JH	255	GFP_KERNEL);
e5fc9cc0 AZ	256	if (!pcf8563)
e5fc9cc0 AZ	257	return -ENOMEM;
b5a82d62	258
b5a82d62 AZ	259	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
b5a82d62 AZ	260
b74d2caa AZ	261	i2c_set_clientdata(client, pcf8563);
b74d2caa AZ	262
d6fbdc34 JH	263	pcf8563->rtc = devm_rtc_device_register(&client->dev,
	264	pcf8563_driver.driver.name,
	265	&pcf8563_rtc_ops, THIS_MODULE);
b5a82d62	266
dac30a98	267	return PTR_ERR_OR_ZERO(pcf8563->rtc);
b5a82d62 AZ	268	}
b5a82d62 AZ	269
3760f736 JD	270	static const struct i2c_device_id pcf8563_id[] = {
3760f736 JD	271	{ "pcf8563", 0 },
8ea9212c	272	{ "rtc8564", 0 },
3760f736 JD	273	{ }
	274	};
	275	MODULE_DEVICE_TABLE(i2c, pcf8563_id);
	276
8dccaf06	277	#ifdef CONFIG_OF
5a167f45	278	static const struct of_device_id pcf8563_of_match[] = {
8dccaf06 NB	279	{ .compatible = "nxp,pcf8563" },
	280	{}
	281	};
	282	MODULE_DEVICE_TABLE(of, pcf8563_of_match);
	283	#endif
	284
e5fc9cc0 AZ	285	static struct i2c_driver pcf8563_driver = {
	286	.driver = {
	287	.name = "rtc-pcf8563",
0a25bf40	288	.owner = THIS_MODULE,
8dccaf06	289	.of_match_table = of_match_ptr(pcf8563_of_match),
e5fc9cc0 AZ	290	},
e5fc9cc0 AZ	291	.probe = pcf8563_probe,
3760f736	292	.id_table = pcf8563_id,
e5fc9cc0 AZ	293	};
e5fc9cc0 AZ	294
0abc9201	295	module_i2c_driver(pcf8563_driver);
b5a82d62 AZ	296
	297	MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
	298	MODULE_DESCRIPTION("Philips PCF8563/Epson RTC8564 RTC driver");
	299	MODULE_LICENSE("GPL");
	300	MODULE_VERSION(DRV_VERSION);