[linux.git] / drivers / rtc / rtc-s5m.c

/*
 * Copyright (c) 2013 Samsung Electronics Co., Ltd
 *	http://www.samsung.com
 *
 *  Copyright (C) 2013 Google, Inc
 *
 *  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.
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/bcd.h>
#include <linux/bitops.h>
#include <linux/regmap.h>
#include <linux/rtc.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/mfd/samsung/core.h>
#include <linux/mfd/samsung/irq.h>
#include <linux/mfd/samsung/rtc.h>

/*
 * Maximum number of retries for checking changes in UDR field
 * of SEC_RTC_UDR_CON register (to limit possible endless loop).
 *
 * After writing to RTC registers (setting time or alarm) read the UDR field
 * in SEC_RTC_UDR_CON register. UDR is auto-cleared when data have
 * been transferred.
 */
#define UDR_READ_RETRY_CNT	5

struct s5m_rtc_info {
	struct device *dev;
	struct sec_pmic_dev *s5m87xx;
	struct regmap *regmap;
	struct rtc_device *rtc_dev;
	int irq;
	int device_type;
	int rtc_24hr_mode;
	bool wtsr_smpl;
};

static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm,
			       int rtc_24hr_mode)
{
	tm->tm_sec = data[RTC_SEC] & 0x7f;
	tm->tm_min = data[RTC_MIN] & 0x7f;
	if (rtc_24hr_mode) {
		tm->tm_hour = data[RTC_HOUR] & 0x1f;
	} else {
		tm->tm_hour = data[RTC_HOUR] & 0x0f;
		if (data[RTC_HOUR] & HOUR_PM_MASK)
			tm->tm_hour += 12;
	}

	tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f);
	tm->tm_mday = data[RTC_DATE] & 0x1f;
	tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
	tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100;
	tm->tm_yday = 0;
	tm->tm_isdst = 0;
}

static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data)
{
	data[RTC_SEC] = tm->tm_sec;
	data[RTC_MIN] = tm->tm_min;

	if (tm->tm_hour >= 12)
		data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK;
	else
		data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK;

	data[RTC_WEEKDAY] = 1 << tm->tm_wday;
	data[RTC_DATE] = tm->tm_mday;
	data[RTC_MONTH] = tm->tm_mon + 1;
	data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0;

	if (tm->tm_year < 100) {
		pr_err("s5m8767 RTC cannot handle the year %d.\n",
		       1900 + tm->tm_year);
		return -EINVAL;
	} else {
		return 0;
	}
}

/*
 * Read RTC_UDR_CON register and wait till UDR field is cleared.
 * This indicates that time/alarm update ended.
 */
static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info)
{
	int ret, retry = UDR_READ_RETRY_CNT;
	unsigned int data;

	do {
		ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data);
	} while (--retry && (data & RTC_UDR_MASK) && !ret);

	if (!retry)
		dev_err(info->dev, "waiting for UDR update, reached max number of retries\n");

	return ret;
}

static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
{
	int ret;
	unsigned int data;

	ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data);
	if (ret < 0) {
		dev_err(info->dev, "failed to read update reg(%d)\n", ret);
		return ret;
	}

	data |= RTC_TIME_EN_MASK;
	data |= RTC_UDR_MASK;

	ret = regmap_write(info->regmap, SEC_RTC_UDR_CON, data);
	if (ret < 0) {
		dev_err(info->dev, "failed to write update reg(%d)\n", ret);
		return ret;
	}

	ret = s5m8767_wait_for_udr_update(info);

	return ret;
}

static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
{
	int ret;
	unsigned int data;

	ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data);
	if (ret < 0) {
		dev_err(info->dev, "%s: fail to read update reg(%d)\n",
			__func__, ret);
		return ret;
	}

	data &= ~RTC_TIME_EN_MASK;
	data |= RTC_UDR_MASK;

	ret = regmap_write(info->regmap, SEC_RTC_UDR_CON, data);
	if (ret < 0) {
		dev_err(info->dev, "%s: fail to write update reg(%d)\n",
			__func__, ret);
		return ret;
	}

	ret = s5m8767_wait_for_udr_update(info);

	return ret;
}

static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm)
{
	tm->tm_sec = bcd2bin(data[RTC_SEC]);
	tm->tm_min = bcd2bin(data[RTC_MIN]);

	if (data[RTC_HOUR] & HOUR_12) {
		tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
		if (data[RTC_HOUR] & HOUR_PM)
			tm->tm_hour += 12;
	} else {
		tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
	}

	tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
	tm->tm_mday = bcd2bin(data[RTC_DATE]);
	tm->tm_mon = bcd2bin(data[RTC_MONTH]);
	tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
	tm->tm_year -= 1900;
}

static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data)
{
	data[RTC_SEC] = bin2bcd(tm->tm_sec);
	data[RTC_MIN] = bin2bcd(tm->tm_min);
	data[RTC_HOUR] = bin2bcd(tm->tm_hour);
	data[RTC_WEEKDAY] = tm->tm_wday;
	data[RTC_DATE] = bin2bcd(tm->tm_mday);
	data[RTC_MONTH] = bin2bcd(tm->tm_mon);
	data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
	data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
}

static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	u8 data[8];
	int ret;

	ret = regmap_bulk_read(info->regmap, SEC_RTC_SEC, data, 8);
	if (ret < 0)
		return ret;

	switch (info->device_type) {
	case S5M8763X:
		s5m8763_data_to_tm(data, tm);
		break;

	case S5M8767X:
		s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
		break;

	default:
		return -EINVAL;
	}

	dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
		1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
		tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);

	return rtc_valid_tm(tm);
}

static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	u8 data[8];
	int ret = 0;

	switch (info->device_type) {
	case S5M8763X:
		s5m8763_tm_to_data(tm, data);
		break;
	case S5M8767X:
		ret = s5m8767_tm_to_data(tm, data);
		break;
	default:
		return -EINVAL;
	}

	if (ret < 0)
		return ret;

	dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
		1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
		tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);

	ret = regmap_raw_write(info->regmap, SEC_RTC_SEC, data, 8);
	if (ret < 0)
		return ret;

	ret = s5m8767_rtc_set_time_reg(info);

	return ret;
}

static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	u8 data[8];
	unsigned int val;
	int ret, i;

	ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8);
	if (ret < 0)
		return ret;

	switch (info->device_type) {
	case S5M8763X:
		s5m8763_data_to_tm(data, &alrm->time);
		ret = regmap_read(info->regmap, SEC_ALARM0_CONF, &val);
		if (ret < 0)
			return ret;

		alrm->enabled = !!val;

		ret = regmap_read(info->regmap, SEC_RTC_STATUS, &val);
		if (ret < 0)
			return ret;

		break;

	case S5M8767X:
		s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
		dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
			1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
			alrm->time.tm_mday, alrm->time.tm_hour,
			alrm->time.tm_min, alrm->time.tm_sec,
			alrm->time.tm_wday);

		alrm->enabled = 0;
		for (i = 0; i < 7; i++) {
			if (data[i] & ALARM_ENABLE_MASK) {
				alrm->enabled = 1;
				break;
			}
		}

		alrm->pending = 0;
		ret = regmap_read(info->regmap, SEC_RTC_STATUS, &val);
		if (ret < 0)
			return ret;
		break;

	default:
		return -EINVAL;
	}

	if (val & ALARM0_STATUS)
		alrm->pending = 1;
	else
		alrm->pending = 0;

	return 0;
}

static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
{
	u8 data[8];
	int ret, i;
	struct rtc_time tm;

	ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8);
	if (ret < 0)
		return ret;

	s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
	dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
		1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
		tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);

	switch (info->device_type) {
	case S5M8763X:
		ret = regmap_write(info->regmap, SEC_ALARM0_CONF, 0);
		break;

	case S5M8767X:
		for (i = 0; i < 7; i++)
			data[i] &= ~ALARM_ENABLE_MASK;

		ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8);
		if (ret < 0)
			return ret;

		ret = s5m8767_rtc_set_alarm_reg(info);

		break;

	default:
		return -EINVAL;
	}

	return ret;
}

static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
{
	int ret;
	u8 data[8];
	u8 alarm0_conf;
	struct rtc_time tm;

	ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8);
	if (ret < 0)
		return ret;

	s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
	dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
		1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
		tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);

	switch (info->device_type) {
	case S5M8763X:
		alarm0_conf = 0x77;
		ret = regmap_write(info->regmap, SEC_ALARM0_CONF, alarm0_conf);
		break;

	case S5M8767X:
		data[RTC_SEC] |= ALARM_ENABLE_MASK;
		data[RTC_MIN] |= ALARM_ENABLE_MASK;
		data[RTC_HOUR] |= ALARM_ENABLE_MASK;
		data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
		if (data[RTC_DATE] & 0x1f)
			data[RTC_DATE] |= ALARM_ENABLE_MASK;
		if (data[RTC_MONTH] & 0xf)
			data[RTC_MONTH] |= ALARM_ENABLE_MASK;
		if (data[RTC_YEAR1] & 0x7f)
			data[RTC_YEAR1] |= ALARM_ENABLE_MASK;

		ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8);
		if (ret < 0)
			return ret;
		ret = s5m8767_rtc_set_alarm_reg(info);

		break;

	default:
		return -EINVAL;
	}

	return ret;
}

static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	u8 data[8];
	int ret;

	switch (info->device_type) {
	case S5M8763X:
		s5m8763_tm_to_data(&alrm->time, data);
		break;

	case S5M8767X:
		s5m8767_tm_to_data(&alrm->time, data);
		break;

	default:
		return -EINVAL;
	}

	dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
		1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
		alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min,
		alrm->time.tm_sec, alrm->time.tm_wday);

	ret = s5m_rtc_stop_alarm(info);
	if (ret < 0)
		return ret;

	ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8);
	if (ret < 0)
		return ret;

	ret = s5m8767_rtc_set_alarm_reg(info);
	if (ret < 0)
		return ret;

	if (alrm->enabled)
		ret = s5m_rtc_start_alarm(info);

	return ret;
}

static int s5m_rtc_alarm_irq_enable(struct device *dev,
				    unsigned int enabled)
{
	struct s5m_rtc_info *info = dev_get_drvdata(dev);

	if (enabled)
		return s5m_rtc_start_alarm(info);
	else
		return s5m_rtc_stop_alarm(info);
}

static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data)
{
	struct s5m_rtc_info *info = data;

	rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);

	return IRQ_HANDLED;
}

static const struct rtc_class_ops s5m_rtc_ops = {
	.read_time = s5m_rtc_read_time,
	.set_time = s5m_rtc_set_time,
	.read_alarm = s5m_rtc_read_alarm,
	.set_alarm = s5m_rtc_set_alarm,
	.alarm_irq_enable = s5m_rtc_alarm_irq_enable,
};

static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable)
{
	int ret;
	ret = regmap_update_bits(info->regmap, SEC_WTSR_SMPL_CNTL,
				 WTSR_ENABLE_MASK,
				 enable ? WTSR_ENABLE_MASK : 0);
	if (ret < 0)
		dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
			__func__, ret);
}

static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable)
{
	int ret;
	ret = regmap_update_bits(info->regmap, SEC_WTSR_SMPL_CNTL,
				 SMPL_ENABLE_MASK,
				 enable ? SMPL_ENABLE_MASK : 0);
	if (ret < 0)
		dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
			__func__, ret);
}

static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
{
	u8 data[2];
	unsigned int tp_read;
	int ret;
	struct rtc_time tm;

	ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &tp_read);
	if (ret < 0) {
		dev_err(info->dev, "%s: fail to read control reg(%d)\n",
			__func__, ret);
		return ret;
	}

	/* Set RTC control register : Binary mode, 24hour mode */
	data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
	data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);

	info->rtc_24hr_mode = 1;
	ret = regmap_raw_write(info->regmap, SEC_ALARM0_CONF, data, 2);
	if (ret < 0) {
		dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
			__func__, ret);
		return ret;
	}

	/* In first boot time, Set rtc time to 1/1/2012 00:00:00(SUN) */
	if ((tp_read & RTC_TCON_MASK) == 0) {
		dev_dbg(info->dev, "rtc init\n");
		tm.tm_sec = 0;
		tm.tm_min = 0;
		tm.tm_hour = 0;
		tm.tm_wday = 0;
		tm.tm_mday = 1;
		tm.tm_mon = 0;
		tm.tm_year = 112;
		tm.tm_yday = 0;
		tm.tm_isdst = 0;
		ret = s5m_rtc_set_time(info->dev, &tm);
	}

	ret = regmap_update_bits(info->regmap, SEC_RTC_UDR_CON,
				 RTC_TCON_MASK, tp_read | RTC_TCON_MASK);
	if (ret < 0)
		dev_err(info->dev, "%s: fail to update TCON reg(%d)\n",
			__func__, ret);

	return ret;
}

static int s5m_rtc_probe(struct platform_device *pdev)
{
	struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
	struct sec_platform_data *pdata = s5m87xx->pdata;
	struct s5m_rtc_info *info;
	int ret;

	if (!pdata) {
		dev_err(pdev->dev.parent, "Platform data not supplied\n");
		return -ENODEV;
	}

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

	info->dev = &pdev->dev;
	info->s5m87xx = s5m87xx;
	info->regmap = s5m87xx->regmap;
	info->device_type = s5m87xx->device_type;
	info->wtsr_smpl = s5m87xx->wtsr_smpl;

	switch (pdata->device_type) {
	case S5M8763X:
		info->irq = regmap_irq_get_virq(s5m87xx->irq_data,
				S5M8763_IRQ_ALARM0);
		break;

	case S5M8767X:
		info->irq = regmap_irq_get_virq(s5m87xx->irq_data,
				S5M8767_IRQ_RTCA1);
		break;

	default:
		ret = -EINVAL;
		dev_err(&pdev->dev, "Unsupported device type: %d\n", ret);
		return ret;
	}

	platform_set_drvdata(pdev, info);

	ret = s5m8767_rtc_init_reg(info);

	if (info->wtsr_smpl) {
		s5m_rtc_enable_wtsr(info, true);
		s5m_rtc_enable_smpl(info, true);
	}

	device_init_wakeup(&pdev->dev, 1);

	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
						 &s5m_rtc_ops, THIS_MODULE);

	if (IS_ERR(info->rtc_dev))
		return PTR_ERR(info->rtc_dev);

	ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
					s5m_rtc_alarm_irq, 0, "rtc-alarm0",
					info);
	if (ret < 0)
		dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
			info->irq, ret);

	return ret;
}

static void s5m_rtc_shutdown(struct platform_device *pdev)
{
	struct s5m_rtc_info *info = platform_get_drvdata(pdev);
	int i;
	unsigned int val = 0;
	if (info->wtsr_smpl) {
		for (i = 0; i < 3; i++) {
			s5m_rtc_enable_wtsr(info, false);
			regmap_read(info->regmap, SEC_WTSR_SMPL_CNTL, &val);
			pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
			if (val & WTSR_ENABLE_MASK)
				pr_emerg("%s: fail to disable WTSR\n",
					 __func__);
			else {
				pr_info("%s: success to disable WTSR\n",
					__func__);
				break;
			}
		}
	}
	/* Disable SMPL when power off */
	s5m_rtc_enable_smpl(info, false);
}

static const struct platform_device_id s5m_rtc_id[] = {
	{ "s5m-rtc", 0 },
};

static struct platform_driver s5m_rtc_driver = {
	.driver		= {
		.name	= "s5m-rtc",
		.owner	= THIS_MODULE,
	},
	.probe		= s5m_rtc_probe,
	.shutdown	= s5m_rtc_shutdown,
	.id_table	= s5m_rtc_id,
};

module_platform_driver(s5m_rtc_driver);

/* Module information */
MODULE_AUTHOR("Sangbeom Kim <[email protected]>");
MODULE_DESCRIPTION("Samsung S5M RTC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s5m-rtc");
Commit	Line	Data
5bccae6e SK	1	/*
	2	* Copyright (c) 2013 Samsung Electronics Co., Ltd
	3	* http://www.samsung.com
	4	*
	5	* Copyright (C) 2013 Google, Inc
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/i2c.h>
	20	#include <linux/slab.h>
	21	#include <linux/bcd.h>
	22	#include <linux/bitops.h>
	23	#include <linux/regmap.h>
	24	#include <linux/rtc.h>
	25	#include <linux/delay.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/mfd/samsung/core.h>
	28	#include <linux/mfd/samsung/irq.h>
	29	#include <linux/mfd/samsung/rtc.h>
	30
d73238d4 KK	31	/*
	32	* Maximum number of retries for checking changes in UDR field
	33	* of SEC_RTC_UDR_CON register (to limit possible endless loop).
	34	*
	35	* After writing to RTC registers (setting time or alarm) read the UDR field
	36	* in SEC_RTC_UDR_CON register. UDR is auto-cleared when data have
	37	* been transferred.
	38	*/
	39	#define UDR_READ_RETRY_CNT 5
	40
5bccae6e SK	41	struct s5m_rtc_info {
	42	struct device *dev;
	43	struct sec_pmic_dev *s5m87xx;
5ccb7d71	44	struct regmap *regmap;
5bccae6e SK	45	struct rtc_device *rtc_dev;
	46	int irq;
	47	int device_type;
	48	int rtc_24hr_mode;
	49	bool wtsr_smpl;
	50	};
	51
	52	static void s5m8767_data_to_tm(u8 data, struct rtc_time tm,
	53	int rtc_24hr_mode)
	54	{
	55	tm->tm_sec = data[RTC_SEC] & 0x7f;
	56	tm->tm_min = data[RTC_MIN] & 0x7f;
	57	if (rtc_24hr_mode) {
	58	tm->tm_hour = data[RTC_HOUR] & 0x1f;
	59	} else {
	60	tm->tm_hour = data[RTC_HOUR] & 0x0f;
	61	if (data[RTC_HOUR] & HOUR_PM_MASK)
	62	tm->tm_hour += 12;
	63	}
	64
	65	tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f);
	66	tm->tm_mday = data[RTC_DATE] & 0x1f;
	67	tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
	68	tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100;
	69	tm->tm_yday = 0;
	70	tm->tm_isdst = 0;
	71	}
	72
	73	static int s5m8767_tm_to_data(struct rtc_time tm, u8 data)
	74	{
	75	data[RTC_SEC] = tm->tm_sec;
	76	data[RTC_MIN] = tm->tm_min;
	77
	78	if (tm->tm_hour >= 12)
	79	data[RTC_HOUR] = tm->tm_hour \| HOUR_PM_MASK;
	80	else
	81	data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK;
	82
	83	data[RTC_WEEKDAY] = 1 << tm->tm_wday;
	84	data[RTC_DATE] = tm->tm_mday;
	85	data[RTC_MONTH] = tm->tm_mon + 1;
	86	data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0;
	87
	88	if (tm->tm_year < 100) {
	89	pr_err("s5m8767 RTC cannot handle the year %d.\n",
	90	1900 + tm->tm_year);
	91	return -EINVAL;
	92	} else {
	93	return 0;
	94	}
	95	}
	96
d73238d4 KK	97	/*
	98	* Read RTC_UDR_CON register and wait till UDR field is cleared.
	99	* This indicates that time/alarm update ended.
	100	*/
	101	static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info)
	102	{
	103	int ret, retry = UDR_READ_RETRY_CNT;
	104	unsigned int data;
	105
	106	do {
	107	ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data);
	108	} while (--retry && (data & RTC_UDR_MASK) && !ret);
	109
	110	if (!retry)
	111	dev_err(info->dev, "waiting for UDR update, reached max number of retries\n");
	112
	113	return ret;
	114	}
	115
5bccae6e SK	116	static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
	117	{
	118	int ret;
	119	unsigned int data;
	120
5ccb7d71	121	ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data);
5bccae6e SK	122	if (ret < 0) {
	123	dev_err(info->dev, "failed to read update reg(%d)\n", ret);
	124	return ret;
	125	}
	126
	127	data \|= RTC_TIME_EN_MASK;
	128	data \|= RTC_UDR_MASK;
	129
5ccb7d71	130	ret = regmap_write(info->regmap, SEC_RTC_UDR_CON, data);
5bccae6e SK	131	if (ret < 0) {
	132	dev_err(info->dev, "failed to write update reg(%d)\n", ret);
	133	return ret;
	134	}
	135
d73238d4	136	ret = s5m8767_wait_for_udr_update(info);
5bccae6e SK	137
	138	return ret;
	139	}
	140
	141	static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
	142	{
	143	int ret;
	144	unsigned int data;
	145
5ccb7d71	146	ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data);
5bccae6e SK	147	if (ret < 0) {
	148	dev_err(info->dev, "%s: fail to read update reg(%d)\n",
	149	__func__, ret);
	150	return ret;
	151	}
	152
	153	data &= ~RTC_TIME_EN_MASK;
	154	data \|= RTC_UDR_MASK;
	155
5ccb7d71	156	ret = regmap_write(info->regmap, SEC_RTC_UDR_CON, data);
5bccae6e SK	157	if (ret < 0) {
	158	dev_err(info->dev, "%s: fail to write update reg(%d)\n",
	159	__func__, ret);
	160	return ret;
	161	}
	162
d73238d4	163	ret = s5m8767_wait_for_udr_update(info);
5bccae6e SK	164
	165	return ret;
	166	}
	167
	168	static void s5m8763_data_to_tm(u8 data, struct rtc_time tm)
	169	{
	170	tm->tm_sec = bcd2bin(data[RTC_SEC]);
	171	tm->tm_min = bcd2bin(data[RTC_MIN]);
	172
	173	if (data[RTC_HOUR] & HOUR_12) {
	174	tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
	175	if (data[RTC_HOUR] & HOUR_PM)
	176	tm->tm_hour += 12;
	177	} else {
	178	tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
	179	}
	180
	181	tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
	182	tm->tm_mday = bcd2bin(data[RTC_DATE]);
	183	tm->tm_mon = bcd2bin(data[RTC_MONTH]);
	184	tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
	185	tm->tm_year -= 1900;
	186	}
	187
	188	static void s5m8763_tm_to_data(struct rtc_time tm, u8 data)
	189	{
	190	data[RTC_SEC] = bin2bcd(tm->tm_sec);
	191	data[RTC_MIN] = bin2bcd(tm->tm_min);
	192	data[RTC_HOUR] = bin2bcd(tm->tm_hour);
	193	data[RTC_WEEKDAY] = tm->tm_wday;
	194	data[RTC_DATE] = bin2bcd(tm->tm_mday);
	195	data[RTC_MONTH] = bin2bcd(tm->tm_mon);
	196	data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
	197	data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
	198	}
	199
	200	static int s5m_rtc_read_time(struct device dev, struct rtc_time tm)
	201	{
	202	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	203	u8 data[8];
	204	int ret;
	205
5ccb7d71	206	ret = regmap_bulk_read(info->regmap, SEC_RTC_SEC, data, 8);
5bccae6e SK	207	if (ret < 0)
	208	return ret;
	209
	210	switch (info->device_type) {
	211	case S5M8763X:
	212	s5m8763_data_to_tm(data, tm);
	213	break;
	214
	215	case S5M8767X:
	216	s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
	217	break;
	218
	219	default:
	220	return -EINVAL;
	221	}
	222
	223	dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
	224	1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
	225	tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
	226
	227	return rtc_valid_tm(tm);
	228	}
	229
	230	static int s5m_rtc_set_time(struct device dev, struct rtc_time tm)
	231	{
	232	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	233	u8 data[8];
	234	int ret = 0;
	235
	236	switch (info->device_type) {
	237	case S5M8763X:
	238	s5m8763_tm_to_data(tm, data);
	239	break;
	240	case S5M8767X:
	241	ret = s5m8767_tm_to_data(tm, data);
	242	break;
	243	default:
	244	return -EINVAL;
	245	}
	246
	247	if (ret < 0)
	248	return ret;
	249
	250	dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
	251	1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
	252	tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
	253
5ccb7d71	254	ret = regmap_raw_write(info->regmap, SEC_RTC_SEC, data, 8);
5bccae6e SK	255	if (ret < 0)
	256	return ret;
	257
	258	ret = s5m8767_rtc_set_time_reg(info);
	259
	260	return ret;
	261	}
	262
	263	static int s5m_rtc_read_alarm(struct device dev, struct rtc_wkalrm alrm)
	264	{
	265	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	266	u8 data[8];
	267	unsigned int val;
	268	int ret, i;
	269
5ccb7d71	270	ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8);
5bccae6e SK	271	if (ret < 0)
	272	return ret;
	273
	274	switch (info->device_type) {
	275	case S5M8763X:
	276	s5m8763_data_to_tm(data, &alrm->time);
5ccb7d71	277	ret = regmap_read(info->regmap, SEC_ALARM0_CONF, &val);
5bccae6e SK	278	if (ret < 0)
	279	return ret;
	280
	281	alrm->enabled = !!val;
	282
5ccb7d71	283	ret = regmap_read(info->regmap, SEC_RTC_STATUS, &val);
5bccae6e SK	284	if (ret < 0)
	285	return ret;
	286
	287	break;
	288
	289	case S5M8767X:
	290	s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
	291	dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
	292	1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
	293	alrm->time.tm_mday, alrm->time.tm_hour,
	294	alrm->time.tm_min, alrm->time.tm_sec,
	295	alrm->time.tm_wday);
	296
	297	alrm->enabled = 0;
	298	for (i = 0; i < 7; i++) {
	299	if (data[i] & ALARM_ENABLE_MASK) {
	300	alrm->enabled = 1;
	301	break;
	302	}
	303	}
	304
	305	alrm->pending = 0;
5ccb7d71	306	ret = regmap_read(info->regmap, SEC_RTC_STATUS, &val);
5bccae6e SK	307	if (ret < 0)
	308	return ret;
	309	break;
	310
	311	default:
	312	return -EINVAL;
	313	}
	314
	315	if (val & ALARM0_STATUS)
	316	alrm->pending = 1;
	317	else
	318	alrm->pending = 0;
	319
	320	return 0;
	321	}
	322
	323	static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
	324	{
	325	u8 data[8];
	326	int ret, i;
	327	struct rtc_time tm;
	328
5ccb7d71	329	ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8);
5bccae6e SK	330	if (ret < 0)
	331	return ret;
	332
	333	s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
	334	dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
	335	1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
	336	tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
	337
	338	switch (info->device_type) {
	339	case S5M8763X:
5ccb7d71	340	ret = regmap_write(info->regmap, SEC_ALARM0_CONF, 0);
5bccae6e SK	341	break;
	342
	343	case S5M8767X:
	344	for (i = 0; i < 7; i++)
	345	data[i] &= ~ALARM_ENABLE_MASK;
	346
5ccb7d71	347	ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8);
5bccae6e SK	348	if (ret < 0)
	349	return ret;
	350
	351	ret = s5m8767_rtc_set_alarm_reg(info);
	352
	353	break;
	354
	355	default:
	356	return -EINVAL;
	357	}
	358
	359	return ret;
	360	}
	361
	362	static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
	363	{
	364	int ret;
	365	u8 data[8];
	366	u8 alarm0_conf;
	367	struct rtc_time tm;
	368
5ccb7d71	369	ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8);
5bccae6e SK	370	if (ret < 0)
	371	return ret;
	372
	373	s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
	374	dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
	375	1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
	376	tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
	377
	378	switch (info->device_type) {
	379	case S5M8763X:
	380	alarm0_conf = 0x77;
5ccb7d71	381	ret = regmap_write(info->regmap, SEC_ALARM0_CONF, alarm0_conf);
5bccae6e SK	382	break;
	383
	384	case S5M8767X:
	385	data[RTC_SEC] \|= ALARM_ENABLE_MASK;
	386	data[RTC_MIN] \|= ALARM_ENABLE_MASK;
	387	data[RTC_HOUR] \|= ALARM_ENABLE_MASK;
	388	data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
	389	if (data[RTC_DATE] & 0x1f)
	390	data[RTC_DATE] \|= ALARM_ENABLE_MASK;
	391	if (data[RTC_MONTH] & 0xf)
	392	data[RTC_MONTH] \|= ALARM_ENABLE_MASK;
	393	if (data[RTC_YEAR1] & 0x7f)
	394	data[RTC_YEAR1] \|= ALARM_ENABLE_MASK;
	395
5ccb7d71	396	ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8);
5bccae6e SK	397	if (ret < 0)
	398	return ret;
	399	ret = s5m8767_rtc_set_alarm_reg(info);
	400
	401	break;
	402
	403	default:
	404	return -EINVAL;
	405	}
	406
	407	return ret;
	408	}
	409
	410	static int s5m_rtc_set_alarm(struct device dev, struct rtc_wkalrm alrm)
	411	{
	412	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	413	u8 data[8];
	414	int ret;
	415
	416	switch (info->device_type) {
	417	case S5M8763X:
	418	s5m8763_tm_to_data(&alrm->time, data);
	419	break;
	420
	421	case S5M8767X:
	422	s5m8767_tm_to_data(&alrm->time, data);
	423	break;
	424
	425	default:
	426	return -EINVAL;
	427	}
	428
	429	dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
	430	1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
	431	alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min,
	432	alrm->time.tm_sec, alrm->time.tm_wday);
	433
	434	ret = s5m_rtc_stop_alarm(info);
	435	if (ret < 0)
	436	return ret;
	437
5ccb7d71	438	ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8);
5bccae6e SK	439	if (ret < 0)
	440	return ret;
	441
	442	ret = s5m8767_rtc_set_alarm_reg(info);
	443	if (ret < 0)
	444	return ret;
	445
	446	if (alrm->enabled)
	447	ret = s5m_rtc_start_alarm(info);
	448
	449	return ret;
	450	}
	451
	452	static int s5m_rtc_alarm_irq_enable(struct device *dev,
	453	unsigned int enabled)
	454	{
	455	struct s5m_rtc_info *info = dev_get_drvdata(dev);
	456
	457	if (enabled)
	458	return s5m_rtc_start_alarm(info);
	459	else
	460	return s5m_rtc_stop_alarm(info);
	461	}
	462
	463	static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data)
	464	{
	465	struct s5m_rtc_info *info = data;
	466
	467	rtc_update_irq(info->rtc_dev, 1, RTC_IRQF \| RTC_AF);
	468
	469	return IRQ_HANDLED;
	470	}
	471
	472	static const struct rtc_class_ops s5m_rtc_ops = {
	473	.read_time = s5m_rtc_read_time,
	474	.set_time = s5m_rtc_set_time,
	475	.read_alarm = s5m_rtc_read_alarm,
	476	.set_alarm = s5m_rtc_set_alarm,
	477	.alarm_irq_enable = s5m_rtc_alarm_irq_enable,
	478	};
	479
	480	static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable)
	481	{
	482	int ret;
5ccb7d71	483	ret = regmap_update_bits(info->regmap, SEC_WTSR_SMPL_CNTL,
5bccae6e SK	484	WTSR_ENABLE_MASK,
	485	enable ? WTSR_ENABLE_MASK : 0);
	486	if (ret < 0)
	487	dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
	488	__func__, ret);
	489	}
	490
	491	static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable)
	492	{
	493	int ret;
5ccb7d71	494	ret = regmap_update_bits(info->regmap, SEC_WTSR_SMPL_CNTL,
5bccae6e SK	495	SMPL_ENABLE_MASK,
	496	enable ? SMPL_ENABLE_MASK : 0);
	497	if (ret < 0)
	498	dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
	499	__func__, ret);
	500	}
	501
	502	static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
	503	{
	504	u8 data[2];
	505	unsigned int tp_read;
	506	int ret;
	507	struct rtc_time tm;
	508
5ccb7d71	509	ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &tp_read);
5bccae6e SK	510	if (ret < 0) {
	511	dev_err(info->dev, "%s: fail to read control reg(%d)\n",
	512	__func__, ret);
	513	return ret;
	514	}
	515
	516	/* Set RTC control register : Binary mode, 24hour mode */
	517	data[0] = (1 << BCD_EN_SHIFT) \| (1 << MODEL24_SHIFT);
	518	data[1] = (0 << BCD_EN_SHIFT) \| (1 << MODEL24_SHIFT);
	519
	520	info->rtc_24hr_mode = 1;
5ccb7d71	521	ret = regmap_raw_write(info->regmap, SEC_ALARM0_CONF, data, 2);
5bccae6e SK	522	if (ret < 0) {
	523	dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
	524	__func__, ret);
	525	return ret;
	526	}
	527
	528	/* In first boot time, Set rtc time to 1/1/2012 00:00:00(SUN) */
	529	if ((tp_read & RTC_TCON_MASK) == 0) {
	530	dev_dbg(info->dev, "rtc init\n");
	531	tm.tm_sec = 0;
	532	tm.tm_min = 0;
	533	tm.tm_hour = 0;
	534	tm.tm_wday = 0;
	535	tm.tm_mday = 1;
	536	tm.tm_mon = 0;
	537	tm.tm_year = 112;
	538	tm.tm_yday = 0;
	539	tm.tm_isdst = 0;
	540	ret = s5m_rtc_set_time(info->dev, &tm);
	541	}
	542
5ccb7d71	543	ret = regmap_update_bits(info->regmap, SEC_RTC_UDR_CON,
5bccae6e SK	544	RTC_TCON_MASK, tp_read \| RTC_TCON_MASK);
	545	if (ret < 0)
	546	dev_err(info->dev, "%s: fail to update TCON reg(%d)\n",
	547	__func__, ret);
	548
	549	return ret;
	550	}
	551
	552	static int s5m_rtc_probe(struct platform_device *pdev)
	553	{
	554	struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
	555	struct sec_platform_data *pdata = s5m87xx->pdata;
	556	struct s5m_rtc_info *info;
	557	int ret;
	558
	559	if (!pdata) {
	560	dev_err(pdev->dev.parent, "Platform data not supplied\n");
	561	return -ENODEV;
	562	}
	563
	564	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	565	if (!info)
	566	return -ENOMEM;
	567
	568	info->dev = &pdev->dev;
	569	info->s5m87xx = s5m87xx;
5ccb7d71	570	info->regmap = s5m87xx->regmap;
5bccae6e SK	571	info->device_type = s5m87xx->device_type;
	572	info->wtsr_smpl = s5m87xx->wtsr_smpl;
	573
	574	switch (pdata->device_type) {
	575	case S5M8763X:
7b003be8 KK	576	info->irq = regmap_irq_get_virq(s5m87xx->irq_data,
7b003be8 KK	577	S5M8763_IRQ_ALARM0);
5bccae6e SK	578	break;
	579
	580	case S5M8767X:
7b003be8 KK	581	info->irq = regmap_irq_get_virq(s5m87xx->irq_data,
7b003be8 KK	582	S5M8767_IRQ_RTCA1);
5bccae6e SK	583	break;
	584
	585	default:
	586	ret = -EINVAL;
	587	dev_err(&pdev->dev, "Unsupported device type: %d\n", ret);
	588	return ret;
	589	}
	590
	591	platform_set_drvdata(pdev, info);
	592
	593	ret = s5m8767_rtc_init_reg(info);
	594
	595	if (info->wtsr_smpl) {
	596	s5m_rtc_enable_wtsr(info, true);
	597	s5m_rtc_enable_smpl(info, true);
	598	}
	599
	600	device_init_wakeup(&pdev->dev, 1);
	601
	602	info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
	603	&s5m_rtc_ops, THIS_MODULE);
	604
	605	if (IS_ERR(info->rtc_dev))
	606	return PTR_ERR(info->rtc_dev);
	607
	608	ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
	609	s5m_rtc_alarm_irq, 0, "rtc-alarm0",
	610	info);
	611	if (ret < 0)
	612	dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
	613	info->irq, ret);
	614
	615	return ret;
	616	}
	617
	618	static void s5m_rtc_shutdown(struct platform_device *pdev)
	619	{
	620	struct s5m_rtc_info *info = platform_get_drvdata(pdev);
	621	int i;
	622	unsigned int val = 0;
	623	if (info->wtsr_smpl) {
	624	for (i = 0; i < 3; i++) {
	625	s5m_rtc_enable_wtsr(info, false);
5ccb7d71	626	regmap_read(info->regmap, SEC_WTSR_SMPL_CNTL, &val);
5bccae6e SK	627	pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
	628	if (val & WTSR_ENABLE_MASK)
	629	pr_emerg("%s: fail to disable WTSR\n",
	630	__func__);
	631	else {
	632	pr_info("%s: success to disable WTSR\n",
	633	__func__);
	634	break;
	635	}
	636	}
	637	}
	638	/* Disable SMPL when power off */
	639	s5m_rtc_enable_smpl(info, false);
	640	}
	641
	642	static const struct platform_device_id s5m_rtc_id[] = {
	643	{ "s5m-rtc", 0 },
	644	};
	645
	646	static struct platform_driver s5m_rtc_driver = {
	647	.driver = {
	648	.name = "s5m-rtc",
	649	.owner = THIS_MODULE,
	650	},
	651	.probe = s5m_rtc_probe,
	652	.shutdown = s5m_rtc_shutdown,
	653	.id_table = s5m_rtc_id,
	654	};
	655
	656	module_platform_driver(s5m_rtc_driver);
	657
	658	/* Module information */
	659	MODULE_AUTHOR("Sangbeom Kim <[email protected]>");
	660	MODULE_DESCRIPTION("Samsung S5M RTC driver");
	661	MODULE_LICENSE("GPL");
	662	MODULE_ALIAS("platform:s5m-rtc");