[linux-block.git] / drivers / rtc / rtc-rp5c01.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Ricoh RP5C01 RTC Driver
 *
 *  Copyright 2009 Geert Uytterhoeven
 *
 *  Based on the A3000 TOD code in arch/m68k/amiga/config.c
 *  Copyright (C) 1993 Hamish Macdonald
 */

#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/slab.h>


enum {
	RP5C01_1_SECOND		= 0x0,	/* MODE 00 */
	RP5C01_10_SECOND	= 0x1,	/* MODE 00 */
	RP5C01_1_MINUTE		= 0x2,	/* MODE 00 and MODE 01 */
	RP5C01_10_MINUTE	= 0x3,	/* MODE 00 and MODE 01 */
	RP5C01_1_HOUR		= 0x4,	/* MODE 00 and MODE 01 */
	RP5C01_10_HOUR		= 0x5,	/* MODE 00 and MODE 01 */
	RP5C01_DAY_OF_WEEK	= 0x6,	/* MODE 00 and MODE 01 */
	RP5C01_1_DAY		= 0x7,	/* MODE 00 and MODE 01 */
	RP5C01_10_DAY		= 0x8,	/* MODE 00 and MODE 01 */
	RP5C01_1_MONTH		= 0x9,	/* MODE 00 */
	RP5C01_10_MONTH		= 0xa,	/* MODE 00 */
	RP5C01_1_YEAR		= 0xb,	/* MODE 00 */
	RP5C01_10_YEAR		= 0xc,	/* MODE 00 */

	RP5C01_12_24_SELECT	= 0xa,	/* MODE 01 */
	RP5C01_LEAP_YEAR	= 0xb,	/* MODE 01 */

	RP5C01_MODE		= 0xd,	/* all modes */
	RP5C01_TEST		= 0xe,	/* all modes */
	RP5C01_RESET		= 0xf,	/* all modes */
};

#define RP5C01_12_24_SELECT_12	(0 << 0)
#define RP5C01_12_24_SELECT_24	(1 << 0)

#define RP5C01_10_HOUR_AM	(0 << 1)
#define RP5C01_10_HOUR_PM	(1 << 1)

#define RP5C01_MODE_TIMER_EN	(1 << 3)	/* timer enable */
#define RP5C01_MODE_ALARM_EN	(1 << 2)	/* alarm enable */

#define RP5C01_MODE_MODE_MASK	(3 << 0)
#define RP5C01_MODE_MODE00	(0 << 0)	/* time */
#define RP5C01_MODE_MODE01	(1 << 0)	/* alarm, 12h/24h, leap year */
#define RP5C01_MODE_RAM_BLOCK10	(2 << 0)	/* RAM 4 bits x 13 */
#define RP5C01_MODE_RAM_BLOCK11	(3 << 0)	/* RAM 4 bits x 13 */

#define RP5C01_RESET_1HZ_PULSE	(1 << 3)
#define RP5C01_RESET_16HZ_PULSE	(1 << 2)
#define RP5C01_RESET_SECOND	(1 << 1)	/* reset divider stages for */
						/* seconds or smaller units */
#define RP5C01_RESET_ALARM	(1 << 0)	/* reset all alarm registers */


struct rp5c01_priv {
	u32 __iomem *regs;
	struct rtc_device *rtc;
	spinlock_t lock;	/* against concurrent RTC/NVRAM access */
};

static inline unsigned int rp5c01_read(struct rp5c01_priv *priv,
				       unsigned int reg)
{
	return __raw_readl(&priv->regs[reg]) & 0xf;
}

static inline void rp5c01_write(struct rp5c01_priv *priv, unsigned int val,
				unsigned int reg)
{
	__raw_writel(val, &priv->regs[reg]);
}

static void rp5c01_lock(struct rp5c01_priv *priv)
{
	rp5c01_write(priv, RP5C01_MODE_MODE00, RP5C01_MODE);
}

static void rp5c01_unlock(struct rp5c01_priv *priv)
{
	rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
		     RP5C01_MODE);
}

static int rp5c01_read_time(struct device *dev, struct rtc_time *tm)
{
	struct rp5c01_priv *priv = dev_get_drvdata(dev);

	spin_lock_irq(&priv->lock);
	rp5c01_lock(priv);

	tm->tm_sec  = rp5c01_read(priv, RP5C01_10_SECOND) * 10 +
		      rp5c01_read(priv, RP5C01_1_SECOND);
	tm->tm_min  = rp5c01_read(priv, RP5C01_10_MINUTE) * 10 +
		      rp5c01_read(priv, RP5C01_1_MINUTE);
	tm->tm_hour = rp5c01_read(priv, RP5C01_10_HOUR) * 10 +
		      rp5c01_read(priv, RP5C01_1_HOUR);
	tm->tm_mday = rp5c01_read(priv, RP5C01_10_DAY) * 10 +
		      rp5c01_read(priv, RP5C01_1_DAY);
	tm->tm_wday = rp5c01_read(priv, RP5C01_DAY_OF_WEEK);
	tm->tm_mon  = rp5c01_read(priv, RP5C01_10_MONTH) * 10 +
		      rp5c01_read(priv, RP5C01_1_MONTH) - 1;
	tm->tm_year = rp5c01_read(priv, RP5C01_10_YEAR) * 10 +
		      rp5c01_read(priv, RP5C01_1_YEAR);
	if (tm->tm_year <= 69)
		tm->tm_year += 100;

	rp5c01_unlock(priv);
	spin_unlock_irq(&priv->lock);

	return 0;
}

static int rp5c01_set_time(struct device *dev, struct rtc_time *tm)
{
	struct rp5c01_priv *priv = dev_get_drvdata(dev);

	spin_lock_irq(&priv->lock);
	rp5c01_lock(priv);

	rp5c01_write(priv, tm->tm_sec / 10, RP5C01_10_SECOND);
	rp5c01_write(priv, tm->tm_sec % 10, RP5C01_1_SECOND);
	rp5c01_write(priv, tm->tm_min / 10, RP5C01_10_MINUTE);
	rp5c01_write(priv, tm->tm_min % 10, RP5C01_1_MINUTE);
	rp5c01_write(priv, tm->tm_hour / 10, RP5C01_10_HOUR);
	rp5c01_write(priv, tm->tm_hour % 10, RP5C01_1_HOUR);
	rp5c01_write(priv, tm->tm_mday / 10, RP5C01_10_DAY);
	rp5c01_write(priv, tm->tm_mday % 10, RP5C01_1_DAY);
	if (tm->tm_wday != -1)
		rp5c01_write(priv, tm->tm_wday, RP5C01_DAY_OF_WEEK);
	rp5c01_write(priv, (tm->tm_mon + 1) / 10, RP5C01_10_MONTH);
	rp5c01_write(priv, (tm->tm_mon + 1) % 10, RP5C01_1_MONTH);
	if (tm->tm_year >= 100)
		tm->tm_year -= 100;
	rp5c01_write(priv, tm->tm_year / 10, RP5C01_10_YEAR);
	rp5c01_write(priv, tm->tm_year % 10, RP5C01_1_YEAR);

	rp5c01_unlock(priv);
	spin_unlock_irq(&priv->lock);
	return 0;
}

static const struct rtc_class_ops rp5c01_rtc_ops = {
	.read_time	= rp5c01_read_time,
	.set_time	= rp5c01_set_time,
};


/*
 * The NVRAM is organized as 2 blocks of 13 nibbles of 4 bits.
 * We provide access to them like AmigaOS does: the high nibble of each 8-bit
 * byte is stored in BLOCK10, the low nibble in BLOCK11.
 */

static int rp5c01_nvram_read(void *_priv, unsigned int pos, void *val,
			     size_t bytes)
{
	struct rp5c01_priv *priv = _priv;
	u8 *buf = val;

	spin_lock_irq(&priv->lock);

	for (; bytes; bytes--) {
		u8 data;

		rp5c01_write(priv,
			     RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK10,
			     RP5C01_MODE);
		data = rp5c01_read(priv, pos) << 4;
		rp5c01_write(priv,
			     RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK11,
			     RP5C01_MODE);
		data |= rp5c01_read(priv, pos++);
		rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
			     RP5C01_MODE);
		*buf++ = data;
	}

	spin_unlock_irq(&priv->lock);
	return 0;
}

static int rp5c01_nvram_write(void *_priv, unsigned int pos, void *val,
			      size_t bytes)
{
	struct rp5c01_priv *priv = _priv;
	u8 *buf = val;

	spin_lock_irq(&priv->lock);

	for (; bytes; bytes--) {
		u8 data = *buf++;

		rp5c01_write(priv,
			     RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK10,
			     RP5C01_MODE);
		rp5c01_write(priv, data >> 4, pos);
		rp5c01_write(priv,
			     RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK11,
			     RP5C01_MODE);
		rp5c01_write(priv, data & 0xf, pos++);
		rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
			     RP5C01_MODE);
	}

	spin_unlock_irq(&priv->lock);
	return 0;
}

static int __init rp5c01_rtc_probe(struct platform_device *dev)
{
	struct resource *res;
	struct rp5c01_priv *priv;
	struct rtc_device *rtc;
	int error;
	struct nvmem_config nvmem_cfg = {
		.name = "rp5c01_nvram",
		.word_size = 1,
		.stride = 1,
		.size = RP5C01_MODE,
		.reg_read = rp5c01_nvram_read,
		.reg_write = rp5c01_nvram_write,
	};

	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;

	priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->regs = devm_ioremap(&dev->dev, res->start, resource_size(res));
	if (!priv->regs)
		return -ENOMEM;

	spin_lock_init(&priv->lock);

	platform_set_drvdata(dev, priv);

	rtc = devm_rtc_allocate_device(&dev->dev);
	if (IS_ERR(rtc))
		return PTR_ERR(rtc);

	rtc->ops = &rp5c01_rtc_ops;

	priv->rtc = rtc;

	nvmem_cfg.priv = priv;
	error = devm_rtc_nvmem_register(rtc, &nvmem_cfg);
	if (error)
		return error;

	return devm_rtc_register_device(rtc);
}

static struct platform_driver rp5c01_rtc_driver = {
	.driver	= {
		.name	= "rtc-rp5c01",
	},
};

module_platform_driver_probe(rp5c01_rtc_driver, rp5c01_rtc_probe);

MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Ricoh RP5C01 RTC driver");
MODULE_ALIAS("platform:rtc-rp5c01");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
4f672ce2 GU	2	/*
	3	* Ricoh RP5C01 RTC Driver
	4	*
	5	* Copyright 2009 Geert Uytterhoeven
	6	*
	7	* Based on the A3000 TOD code in arch/m68k/amiga/config.c
	8	* Copyright (C) 1993 Hamish Macdonald
	9	*/
	10
	11	#include <linux/io.h>
	12	#include <linux/kernel.h>
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/rtc.h>
5a0e3ad6	16	#include <linux/slab.h>
4f672ce2 GU	17
	18
	19	enum {
	20	RP5C01_1_SECOND = 0x0, /* MODE 00 */
	21	RP5C01_10_SECOND = 0x1, /* MODE 00 */
	22	RP5C01_1_MINUTE = 0x2, /* MODE 00 and MODE 01 */
	23	RP5C01_10_MINUTE = 0x3, /* MODE 00 and MODE 01 */
	24	RP5C01_1_HOUR = 0x4, /* MODE 00 and MODE 01 */
	25	RP5C01_10_HOUR = 0x5, /* MODE 00 and MODE 01 */
	26	RP5C01_DAY_OF_WEEK = 0x6, /* MODE 00 and MODE 01 */
	27	RP5C01_1_DAY = 0x7, /* MODE 00 and MODE 01 */
	28	RP5C01_10_DAY = 0x8, /* MODE 00 and MODE 01 */
	29	RP5C01_1_MONTH = 0x9, /* MODE 00 */
	30	RP5C01_10_MONTH = 0xa, /* MODE 00 */
	31	RP5C01_1_YEAR = 0xb, /* MODE 00 */
	32	RP5C01_10_YEAR = 0xc, /* MODE 00 */
	33
	34	RP5C01_12_24_SELECT = 0xa, /* MODE 01 */
	35	RP5C01_LEAP_YEAR = 0xb, /* MODE 01 */
	36
	37	RP5C01_MODE = 0xd, /* all modes */
	38	RP5C01_TEST = 0xe, /* all modes */
	39	RP5C01_RESET = 0xf, /* all modes */
	40	};
	41
	42	#define RP5C01_12_24_SELECT_12 (0 << 0)
	43	#define RP5C01_12_24_SELECT_24 (1 << 0)
	44
	45	#define RP5C01_10_HOUR_AM (0 << 1)
	46	#define RP5C01_10_HOUR_PM (1 << 1)
	47
	48	#define RP5C01_MODE_TIMER_EN (1 << 3) /* timer enable */
	49	#define RP5C01_MODE_ALARM_EN (1 << 2) /* alarm enable */
	50
	51	#define RP5C01_MODE_MODE_MASK (3 << 0)
	52	#define RP5C01_MODE_MODE00 (0 << 0) /* time */
	53	#define RP5C01_MODE_MODE01 (1 << 0) /* alarm, 12h/24h, leap year */
	54	#define RP5C01_MODE_RAM_BLOCK10 (2 << 0) /* RAM 4 bits x 13 */
	55	#define RP5C01_MODE_RAM_BLOCK11 (3 << 0) /* RAM 4 bits x 13 */
	56
	57	#define RP5C01_RESET_1HZ_PULSE (1 << 3)
	58	#define RP5C01_RESET_16HZ_PULSE (1 << 2)
	59	#define RP5C01_RESET_SECOND (1 << 1) /* reset divider stages for */
	60	/* seconds or smaller units */
	61	#define RP5C01_RESET_ALARM (1 << 0) /* reset all alarm registers */
	62
	63
	64	struct rp5c01_priv {
	65	u32 __iomem *regs;
	66	struct rtc_device *rtc;
22e3d631	67	spinlock_t lock; /* against concurrent RTC/NVRAM access */
4f672ce2 GU	68	};
	69
	70	static inline unsigned int rp5c01_read(struct rp5c01_priv *priv,
	71	unsigned int reg)
	72	{
	73	return __raw_readl(&priv->regs[reg]) & 0xf;
	74	}
	75
	76	static inline void rp5c01_write(struct rp5c01_priv *priv, unsigned int val,
	77	unsigned int reg)
	78	{
d8ce1481	79	__raw_writel(val, &priv->regs[reg]);
4f672ce2 GU	80	}
	81
	82	static void rp5c01_lock(struct rp5c01_priv *priv)
	83	{
	84	rp5c01_write(priv, RP5C01_MODE_MODE00, RP5C01_MODE);
	85	}
	86
	87	static void rp5c01_unlock(struct rp5c01_priv *priv)
	88	{
	89	rp5c01_write(priv, RP5C01_MODE_TIMER_EN \| RP5C01_MODE_MODE01,
	90	RP5C01_MODE);
	91	}
	92
	93	static int rp5c01_read_time(struct device dev, struct rtc_time tm)
	94	{
	95	struct rp5c01_priv *priv = dev_get_drvdata(dev);
	96
22e3d631	97	spin_lock_irq(&priv->lock);
4f672ce2 GU	98	rp5c01_lock(priv);
	99
	100	tm->tm_sec = rp5c01_read(priv, RP5C01_10_SECOND) * 10 +
	101	rp5c01_read(priv, RP5C01_1_SECOND);
	102	tm->tm_min = rp5c01_read(priv, RP5C01_10_MINUTE) * 10 +
	103	rp5c01_read(priv, RP5C01_1_MINUTE);
	104	tm->tm_hour = rp5c01_read(priv, RP5C01_10_HOUR) * 10 +
	105	rp5c01_read(priv, RP5C01_1_HOUR);
	106	tm->tm_mday = rp5c01_read(priv, RP5C01_10_DAY) * 10 +
	107	rp5c01_read(priv, RP5C01_1_DAY);
	108	tm->tm_wday = rp5c01_read(priv, RP5C01_DAY_OF_WEEK);
	109	tm->tm_mon = rp5c01_read(priv, RP5C01_10_MONTH) * 10 +
	110	rp5c01_read(priv, RP5C01_1_MONTH) - 1;
	111	tm->tm_year = rp5c01_read(priv, RP5C01_10_YEAR) * 10 +
	112	rp5c01_read(priv, RP5C01_1_YEAR);
	113	if (tm->tm_year <= 69)
	114	tm->tm_year += 100;
	115
	116	rp5c01_unlock(priv);
22e3d631	117	spin_unlock_irq(&priv->lock);
4f672ce2	118
22652ba7	119	return 0;
4f672ce2 GU	120	}
	121
	122	static int rp5c01_set_time(struct device dev, struct rtc_time tm)
	123	{
	124	struct rp5c01_priv *priv = dev_get_drvdata(dev);
	125
22e3d631	126	spin_lock_irq(&priv->lock);
4f672ce2 GU	127	rp5c01_lock(priv);
	128
	129	rp5c01_write(priv, tm->tm_sec / 10, RP5C01_10_SECOND);
	130	rp5c01_write(priv, tm->tm_sec % 10, RP5C01_1_SECOND);
	131	rp5c01_write(priv, tm->tm_min / 10, RP5C01_10_MINUTE);
	132	rp5c01_write(priv, tm->tm_min % 10, RP5C01_1_MINUTE);
	133	rp5c01_write(priv, tm->tm_hour / 10, RP5C01_10_HOUR);
	134	rp5c01_write(priv, tm->tm_hour % 10, RP5C01_1_HOUR);
	135	rp5c01_write(priv, tm->tm_mday / 10, RP5C01_10_DAY);
	136	rp5c01_write(priv, tm->tm_mday % 10, RP5C01_1_DAY);
	137	if (tm->tm_wday != -1)
	138	rp5c01_write(priv, tm->tm_wday, RP5C01_DAY_OF_WEEK);
	139	rp5c01_write(priv, (tm->tm_mon + 1) / 10, RP5C01_10_MONTH);
	140	rp5c01_write(priv, (tm->tm_mon + 1) % 10, RP5C01_1_MONTH);
	141	if (tm->tm_year >= 100)
	142	tm->tm_year -= 100;
	143	rp5c01_write(priv, tm->tm_year / 10, RP5C01_10_YEAR);
	144	rp5c01_write(priv, tm->tm_year % 10, RP5C01_1_YEAR);
	145
	146	rp5c01_unlock(priv);
22e3d631	147	spin_unlock_irq(&priv->lock);
4f672ce2 GU	148	return 0;
	149	}
	150
	151	static const struct rtc_class_ops rp5c01_rtc_ops = {
	152	.read_time = rp5c01_read_time,
	153	.set_time = rp5c01_set_time,
	154	};
	155
22e3d631 GU	156
	157	/*
	158	* The NVRAM is organized as 2 blocks of 13 nibbles of 4 bits.
	159	* We provide access to them like AmigaOS does: the high nibble of each 8-bit
	160	* byte is stored in BLOCK10, the low nibble in BLOCK11.
	161	*/
	162
7335fb9b AB	163	static int rp5c01_nvram_read(void _priv, unsigned int pos, void val,
7335fb9b AB	164	size_t bytes)
22e3d631	165	{
7335fb9b AB	166	struct rp5c01_priv *priv = _priv;
7335fb9b AB	167	u8 *buf = val;
22e3d631 GU	168
	169	spin_lock_irq(&priv->lock);
	170
7335fb9b	171	for (; bytes; bytes--) {
22e3d631 GU	172	u8 data;
	173
	174	rp5c01_write(priv,
	175	RP5C01_MODE_TIMER_EN \| RP5C01_MODE_RAM_BLOCK10,
	176	RP5C01_MODE);
	177	data = rp5c01_read(priv, pos) << 4;
	178	rp5c01_write(priv,
	179	RP5C01_MODE_TIMER_EN \| RP5C01_MODE_RAM_BLOCK11,
	180	RP5C01_MODE);
	181	data \|= rp5c01_read(priv, pos++);
	182	rp5c01_write(priv, RP5C01_MODE_TIMER_EN \| RP5C01_MODE_MODE01,
	183	RP5C01_MODE);
	184	*buf++ = data;
	185	}
	186
	187	spin_unlock_irq(&priv->lock);
7335fb9b	188	return 0;
22e3d631 GU	189	}
22e3d631 GU	190
7335fb9b AB	191	static int rp5c01_nvram_write(void _priv, unsigned int pos, void val,
7335fb9b AB	192	size_t bytes)
22e3d631	193	{
7335fb9b AB	194	struct rp5c01_priv *priv = _priv;
7335fb9b AB	195	u8 *buf = val;
22e3d631 GU	196
	197	spin_lock_irq(&priv->lock);
	198
7335fb9b	199	for (; bytes; bytes--) {
22e3d631 GU	200	u8 data = *buf++;
	201
	202	rp5c01_write(priv,
	203	RP5C01_MODE_TIMER_EN \| RP5C01_MODE_RAM_BLOCK10,
	204	RP5C01_MODE);
	205	rp5c01_write(priv, data >> 4, pos);
	206	rp5c01_write(priv,
	207	RP5C01_MODE_TIMER_EN \| RP5C01_MODE_RAM_BLOCK11,
	208	RP5C01_MODE);
	209	rp5c01_write(priv, data & 0xf, pos++);
	210	rp5c01_write(priv, RP5C01_MODE_TIMER_EN \| RP5C01_MODE_MODE01,
	211	RP5C01_MODE);
	212	}
	213
	214	spin_unlock_irq(&priv->lock);
7335fb9b	215	return 0;
22e3d631 GU	216	}
22e3d631 GU	217
4f672ce2 GU	218	static int __init rp5c01_rtc_probe(struct platform_device *dev)
	219	{
	220	struct resource *res;
	221	struct rp5c01_priv *priv;
	222	struct rtc_device *rtc;
	223	int error;
7335fb9b AB	224	struct nvmem_config nvmem_cfg = {
	225	.name = "rp5c01_nvram",
	226	.word_size = 1,
	227	.stride = 1,
	228	.size = RP5C01_MODE,
	229	.reg_read = rp5c01_nvram_read,
	230	.reg_write = rp5c01_nvram_write,
	231	};
4f672ce2 GU	232
	233	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
	234	if (!res)
	235	return -ENODEV;
	236
ddb396f1	237	priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
4f672ce2 GU	238	if (!priv)
	239	return -ENOMEM;
	240
ddb396f1 JH	241	priv->regs = devm_ioremap(&dev->dev, res->start, resource_size(res));
	242	if (!priv->regs)
	243	return -ENOMEM;
4f672ce2	244
22e3d631 GU	245	spin_lock_init(&priv->lock);
22e3d631 GU	246
130107b2 JS	247	platform_set_drvdata(dev, priv);
130107b2 JS	248
bcdd5592	249	rtc = devm_rtc_allocate_device(&dev->dev);
a81de207 JH	250	if (IS_ERR(rtc))
a81de207 JH	251	return PTR_ERR(rtc);
bcdd5592 AB	252
	253	rtc->ops = &rp5c01_rtc_ops;
	254
4f672ce2	255	priv->rtc = rtc;
22e3d631	256
7335fb9b	257	nvmem_cfg.priv = priv;
3a905c2d	258	error = devm_rtc_nvmem_register(rtc, &nvmem_cfg);
22e3d631	259	if (error)
a81de207	260	return error;
22e3d631	261
fdcfd854	262	return devm_rtc_register_device(rtc);
4f672ce2 GU	263	}
	264
	265	static struct platform_driver rp5c01_rtc_driver = {
	266	.driver = {
	267	.name = "rtc-rp5c01",
4f672ce2	268	},
4f672ce2 GU	269	};
4f672ce2 GU	270
9842eaff	271	module_platform_driver_probe(rp5c01_rtc_driver, rp5c01_rtc_probe);
4f672ce2 GU	272
	273	MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
	274	MODULE_LICENSE("GPL");
	275	MODULE_DESCRIPTION("Ricoh RP5C01 RTC driver");
	276	MODULE_ALIAS("platform:rtc-rp5c01");