[linux-block.git] / drivers / rtc / rtc-s3c.c

// SPDX-License-Identifier: GPL-2.0-only
/* drivers/rtc/rtc-s3c.c
 *
 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com/
 *
 * Copyright (c) 2004,2006 Simtec Electronics
 *	Ben Dooks, <ben@simtec.co.uk>
 *	http://armlinux.simtec.co.uk/
 *
 * S3C2410/S3C2440/S3C24XX Internal RTC Driver
*/

#include <linux/module.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/rtc.h>
#include <linux/bcd.h>
#include <linux/clk.h>
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/uaccess.h>
#include <linux/io.h>

#include <asm/irq.h>
#include "rtc-s3c.h"

struct s3c_rtc {
	struct device *dev;
	struct rtc_device *rtc;

	void __iomem *base;
	struct clk *rtc_clk;
	struct clk *rtc_src_clk;
	bool alarm_enabled;

	const struct s3c_rtc_data *data;

	int irq_alarm;
	spinlock_t alarm_lock;

	bool wake_en;
};

struct s3c_rtc_data {
	bool needs_src_clk;

	void (*irq_handler) (struct s3c_rtc *info, int mask);
	void (*enable) (struct s3c_rtc *info);
	void (*disable) (struct s3c_rtc *info);
};

static int s3c_rtc_enable_clk(struct s3c_rtc *info)
{
	int ret;

	ret = clk_enable(info->rtc_clk);
	if (ret)
		return ret;

	if (info->data->needs_src_clk) {
		ret = clk_enable(info->rtc_src_clk);
		if (ret) {
			clk_disable(info->rtc_clk);
			return ret;
		}
	}
	return 0;
}

static void s3c_rtc_disable_clk(struct s3c_rtc *info)
{
	if (info->data->needs_src_clk)
		clk_disable(info->rtc_src_clk);
	clk_disable(info->rtc_clk);
}

/* IRQ Handler */
static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
{
	struct s3c_rtc *info = (struct s3c_rtc *)id;

	if (info->data->irq_handler)
		info->data->irq_handler(info, S3C2410_INTP_ALM);

	return IRQ_HANDLED;
}

/* Update control registers */
static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
{
	struct s3c_rtc *info = dev_get_drvdata(dev);
	unsigned long flags;
	unsigned int tmp;
	int ret;

	dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);

	ret = s3c_rtc_enable_clk(info);
	if (ret)
		return ret;

	tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;

	if (enabled)
		tmp |= S3C2410_RTCALM_ALMEN;

	writeb(tmp, info->base + S3C2410_RTCALM);

	spin_lock_irqsave(&info->alarm_lock, flags);

	if (info->alarm_enabled && !enabled)
		s3c_rtc_disable_clk(info);
	else if (!info->alarm_enabled && enabled)
		ret = s3c_rtc_enable_clk(info);

	info->alarm_enabled = enabled;
	spin_unlock_irqrestore(&info->alarm_lock, flags);

	s3c_rtc_disable_clk(info);

	return ret;
}

/* Read time from RTC and convert it from BCD */
static int s3c_rtc_read_time(struct s3c_rtc *info, struct rtc_time *tm)
{
	unsigned int have_retried = 0;
	int ret;

	ret = s3c_rtc_enable_clk(info);
	if (ret)
		return ret;

retry_get_time:
	tm->tm_min  = readb(info->base + S3C2410_RTCMIN);
	tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
	tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
	tm->tm_mon  = readb(info->base + S3C2410_RTCMON);
	tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
	tm->tm_sec  = readb(info->base + S3C2410_RTCSEC);

	/*
	 * The only way to work out whether the system was mid-update
	 * when we read it is to check the second counter, and if it
	 * is zero, then we re-try the entire read
	 */
	if (tm->tm_sec == 0 && !have_retried) {
		have_retried = 1;
		goto retry_get_time;
	}

	s3c_rtc_disable_clk(info);

	tm->tm_sec  = bcd2bin(tm->tm_sec);
	tm->tm_min  = bcd2bin(tm->tm_min);
	tm->tm_hour = bcd2bin(tm->tm_hour);
	tm->tm_mday = bcd2bin(tm->tm_mday);
	tm->tm_mon  = bcd2bin(tm->tm_mon);
	tm->tm_year = bcd2bin(tm->tm_year);

	return 0;
}

/* Convert time to BCD and write it to RTC */
static int s3c_rtc_write_time(struct s3c_rtc *info, const struct rtc_time *tm)
{
	int ret;

	ret = s3c_rtc_enable_clk(info);
	if (ret)
		return ret;

	writeb(bin2bcd(tm->tm_sec),  info->base + S3C2410_RTCSEC);
	writeb(bin2bcd(tm->tm_min),  info->base + S3C2410_RTCMIN);
	writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
	writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
	writeb(bin2bcd(tm->tm_mon),  info->base + S3C2410_RTCMON);
	writeb(bin2bcd(tm->tm_year), info->base + S3C2410_RTCYEAR);

	s3c_rtc_disable_clk(info);

	return 0;
}

static int s3c_rtc_gettime(struct device *dev, struct rtc_time *tm)
{
	struct s3c_rtc *info = dev_get_drvdata(dev);
	int ret;

	ret = s3c_rtc_read_time(info, tm);
	if (ret)
		return ret;

	/* Convert internal representation to actual date/time */
	tm->tm_year += 100;
	tm->tm_mon -= 1;

	dev_dbg(dev, "read time %ptR\n", tm);
	return 0;
}

static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
{
	struct s3c_rtc *info = dev_get_drvdata(dev);
	struct rtc_time rtc_tm = *tm;

	dev_dbg(dev, "set time %ptR\n", tm);

	/*
	 * Convert actual date/time to internal representation.
	 * We get around Y2K by simply not supporting it.
	 */
	rtc_tm.tm_year -= 100;
	rtc_tm.tm_mon += 1;

	return s3c_rtc_write_time(info, &rtc_tm);
}

static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct s3c_rtc *info = dev_get_drvdata(dev);
	struct rtc_time *alm_tm = &alrm->time;
	unsigned int alm_en;
	int ret;

	ret = s3c_rtc_enable_clk(info);
	if (ret)
		return ret;

	alm_tm->tm_sec  = readb(info->base + S3C2410_ALMSEC);
	alm_tm->tm_min  = readb(info->base + S3C2410_ALMMIN);
	alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
	alm_tm->tm_mon  = readb(info->base + S3C2410_ALMMON);
	alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
	alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);

	alm_en = readb(info->base + S3C2410_RTCALM);

	s3c_rtc_disable_clk(info);

	alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;

	dev_dbg(dev, "read alarm %d, %ptR\n", alm_en, alm_tm);

	/* decode the alarm enable field */
	if (alm_en & S3C2410_RTCALM_SECEN)
		alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);

	if (alm_en & S3C2410_RTCALM_MINEN)
		alm_tm->tm_min = bcd2bin(alm_tm->tm_min);

	if (alm_en & S3C2410_RTCALM_HOUREN)
		alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);

	if (alm_en & S3C2410_RTCALM_DAYEN)
		alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);

	if (alm_en & S3C2410_RTCALM_MONEN) {
		alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
		alm_tm->tm_mon -= 1;
	}

	if (alm_en & S3C2410_RTCALM_YEAREN)
		alm_tm->tm_year = bcd2bin(alm_tm->tm_year);

	return 0;
}

static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
	struct s3c_rtc *info = dev_get_drvdata(dev);
	struct rtc_time *tm = &alrm->time;
	unsigned int alrm_en;
	int ret;

	dev_dbg(dev, "s3c_rtc_setalarm: %d, %ptR\n", alrm->enabled, tm);

	ret = s3c_rtc_enable_clk(info);
	if (ret)
		return ret;

	alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
	writeb(0x00, info->base + S3C2410_RTCALM);

	if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
		alrm_en |= S3C2410_RTCALM_SECEN;
		writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC);
	}

	if (tm->tm_min < 60 && tm->tm_min >= 0) {
		alrm_en |= S3C2410_RTCALM_MINEN;
		writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN);
	}

	if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
		alrm_en |= S3C2410_RTCALM_HOUREN;
		writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
	}

	if (tm->tm_mon < 12 && tm->tm_mon >= 0) {
		alrm_en |= S3C2410_RTCALM_MONEN;
		writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON);
	}

	if (tm->tm_mday <= 31 && tm->tm_mday >= 1) {
		alrm_en |= S3C2410_RTCALM_DAYEN;
		writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE);
	}

	dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);

	writeb(alrm_en, info->base + S3C2410_RTCALM);

	s3c_rtc_setaie(dev, alrm->enabled);

	s3c_rtc_disable_clk(info);

	return 0;
}

static const struct rtc_class_ops s3c_rtcops = {
	.read_time	= s3c_rtc_gettime,
	.set_time	= s3c_rtc_settime,
	.read_alarm	= s3c_rtc_getalarm,
	.set_alarm	= s3c_rtc_setalarm,
	.alarm_irq_enable = s3c_rtc_setaie,
};

static void s3c24xx_rtc_enable(struct s3c_rtc *info)
{
	unsigned int con, tmp;

	con = readw(info->base + S3C2410_RTCCON);
	/* re-enable the device, and check it is ok */
	if ((con & S3C2410_RTCCON_RTCEN) == 0) {
		dev_info(info->dev, "rtc disabled, re-enabling\n");

		tmp = readw(info->base + S3C2410_RTCCON);
		writew(tmp | S3C2410_RTCCON_RTCEN, info->base + S3C2410_RTCCON);
	}

	if (con & S3C2410_RTCCON_CNTSEL) {
		dev_info(info->dev, "removing RTCCON_CNTSEL\n");

		tmp = readw(info->base + S3C2410_RTCCON);
		writew(tmp & ~S3C2410_RTCCON_CNTSEL,
		       info->base + S3C2410_RTCCON);
	}

	if (con & S3C2410_RTCCON_CLKRST) {
		dev_info(info->dev, "removing RTCCON_CLKRST\n");

		tmp = readw(info->base + S3C2410_RTCCON);
		writew(tmp & ~S3C2410_RTCCON_CLKRST,
		       info->base + S3C2410_RTCCON);
	}
}

static void s3c24xx_rtc_disable(struct s3c_rtc *info)
{
	unsigned int con;

	con = readw(info->base + S3C2410_RTCCON);
	con &= ~S3C2410_RTCCON_RTCEN;
	writew(con, info->base + S3C2410_RTCCON);

	con = readb(info->base + S3C2410_TICNT);
	con &= ~S3C2410_TICNT_ENABLE;
	writeb(con, info->base + S3C2410_TICNT);
}

static void s3c6410_rtc_disable(struct s3c_rtc *info)
{
	unsigned int con;

	con = readw(info->base + S3C2410_RTCCON);
	con &= ~S3C64XX_RTCCON_TICEN;
	con &= ~S3C2410_RTCCON_RTCEN;
	writew(con, info->base + S3C2410_RTCCON);
}

static int s3c_rtc_remove(struct platform_device *pdev)
{
	struct s3c_rtc *info = platform_get_drvdata(pdev);

	s3c_rtc_setaie(info->dev, 0);

	if (info->data->needs_src_clk)
		clk_unprepare(info->rtc_src_clk);
	clk_unprepare(info->rtc_clk);

	return 0;
}

static int s3c_rtc_probe(struct platform_device *pdev)
{
	struct s3c_rtc *info = NULL;
	int ret;

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

	info->dev = &pdev->dev;
	info->data = of_device_get_match_data(&pdev->dev);
	if (!info->data) {
		dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
		return -EINVAL;
	}
	spin_lock_init(&info->alarm_lock);

	platform_set_drvdata(pdev, info);

	info->irq_alarm = platform_get_irq(pdev, 0);
	if (info->irq_alarm < 0)
		return info->irq_alarm;

	dev_dbg(&pdev->dev, "s3c2410_rtc: alarm irq %d\n", info->irq_alarm);

	/* get the memory region */
	info->base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(info->base))
		return PTR_ERR(info->base);

	info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
	if (IS_ERR(info->rtc_clk))
		return dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_clk),
				     "failed to find rtc clock\n");
	ret = clk_prepare_enable(info->rtc_clk);
	if (ret)
		return ret;

	if (info->data->needs_src_clk) {
		info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
		if (IS_ERR(info->rtc_src_clk)) {
			ret = dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_src_clk),
					    "failed to find rtc source clock\n");
			goto err_src_clk;
		}
		ret = clk_prepare_enable(info->rtc_src_clk);
		if (ret)
			goto err_src_clk;
	}

	/* disable RTC enable bits potentially set by the bootloader */
	if (info->data->disable)
		info->data->disable(info);

	/* check to see if everything is setup correctly */
	if (info->data->enable)
		info->data->enable(info);

	dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
		readw(info->base + S3C2410_RTCCON));

	device_init_wakeup(&pdev->dev, 1);

	info->rtc = devm_rtc_allocate_device(&pdev->dev);
	if (IS_ERR(info->rtc)) {
		ret = PTR_ERR(info->rtc);
		goto err_nortc;
	}

	info->rtc->ops = &s3c_rtcops;
	info->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
	info->rtc->range_max = RTC_TIMESTAMP_END_2099;

	ret = devm_rtc_register_device(info->rtc);
	if (ret)
		goto err_nortc;

	ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
			       0, "s3c2410-rtc alarm", info);
	if (ret) {
		dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
		goto err_nortc;
	}

	s3c_rtc_disable_clk(info);

	return 0;

err_nortc:
	if (info->data->disable)
		info->data->disable(info);

	if (info->data->needs_src_clk)
		clk_disable_unprepare(info->rtc_src_clk);
err_src_clk:
	clk_disable_unprepare(info->rtc_clk);

	return ret;
}

#ifdef CONFIG_PM_SLEEP

static int s3c_rtc_suspend(struct device *dev)
{
	struct s3c_rtc *info = dev_get_drvdata(dev);
	int ret;

	ret = s3c_rtc_enable_clk(info);
	if (ret)
		return ret;

	if (info->data->disable)
		info->data->disable(info);

	if (device_may_wakeup(dev) && !info->wake_en) {
		if (enable_irq_wake(info->irq_alarm) == 0)
			info->wake_en = true;
		else
			dev_err(dev, "enable_irq_wake failed\n");
	}

	return 0;
}

static int s3c_rtc_resume(struct device *dev)
{
	struct s3c_rtc *info = dev_get_drvdata(dev);

	if (info->data->enable)
		info->data->enable(info);

	s3c_rtc_disable_clk(info);

	if (device_may_wakeup(dev) && info->wake_en) {
		disable_irq_wake(info->irq_alarm);
		info->wake_en = false;
	}

	return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);

static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
{
	rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
}

static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
{
	rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
	writeb(mask, info->base + S3C2410_INTP);
}

static struct s3c_rtc_data const s3c2410_rtc_data = {
	.irq_handler		= s3c24xx_rtc_irq,
	.enable			= s3c24xx_rtc_enable,
	.disable		= s3c24xx_rtc_disable,
};

static struct s3c_rtc_data const s3c2416_rtc_data = {
	.irq_handler		= s3c24xx_rtc_irq,
	.enable			= s3c24xx_rtc_enable,
	.disable		= s3c24xx_rtc_disable,
};

static struct s3c_rtc_data const s3c2443_rtc_data = {
	.irq_handler		= s3c24xx_rtc_irq,
	.enable			= s3c24xx_rtc_enable,
	.disable		= s3c24xx_rtc_disable,
};

static struct s3c_rtc_data const s3c6410_rtc_data = {
	.needs_src_clk		= true,
	.irq_handler		= s3c6410_rtc_irq,
	.enable			= s3c24xx_rtc_enable,
	.disable		= s3c6410_rtc_disable,
};

static const __maybe_unused struct of_device_id s3c_rtc_dt_match[] = {
	{
		.compatible = "samsung,s3c2410-rtc",
		.data = &s3c2410_rtc_data,
	}, {
		.compatible = "samsung,s3c2416-rtc",
		.data = &s3c2416_rtc_data,
	}, {
		.compatible = "samsung,s3c2443-rtc",
		.data = &s3c2443_rtc_data,
	}, {
		.compatible = "samsung,s3c6410-rtc",
		.data = &s3c6410_rtc_data,
	}, {
		.compatible = "samsung,exynos3250-rtc",
		.data = &s3c6410_rtc_data,
	},
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);

static struct platform_driver s3c_rtc_driver = {
	.probe		= s3c_rtc_probe,
	.remove		= s3c_rtc_remove,
	.driver		= {
		.name	= "s3c-rtc",
		.pm	= &s3c_rtc_pm_ops,
		.of_match_table	= of_match_ptr(s3c_rtc_dt_match),
	},
};
module_platform_driver(s3c_rtc_driver);

MODULE_DESCRIPTION("Samsung S3C RTC Driver");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s3c2410-rtc");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
1add6781	2	/* drivers/rtc/rtc-s3c.c
e48add8c AD	3	*
	4	* Copyright (c) 2010 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com/
1add6781 BD	6	*
	7	* Copyright (c) 2004,2006 Simtec Electronics
	8	* Ben Dooks, <ben@simtec.co.uk>
	9	* http://armlinux.simtec.co.uk/
	10	*
1add6781 BD	11	* S3C2410/S3C2440/S3C24XX Internal RTC Driver
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/fs.h>
	16	#include <linux/string.h>
	17	#include <linux/init.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/rtc.h>
	21	#include <linux/bcd.h>
	22	#include <linux/clk.h>
9974b6ea	23	#include <linux/log2.h>
5a0e3ad6	24	#include <linux/slab.h>
39ce4084	25	#include <linux/of.h>
64704c92	26	#include <linux/of_device.h>
dbd9acbe SK	27	#include <linux/uaccess.h>
dbd9acbe SK	28	#include <linux/io.h>
1add6781	29
1add6781	30	#include <asm/irq.h>
b9d7c5d3	31	#include "rtc-s3c.h"
1add6781	32
19be09f5 CC	33	struct s3c_rtc {
	34	struct device *dev;
	35	struct rtc_device *rtc;
	36
	37	void __iomem *base;
	38	struct clk *rtc_clk;
df9e26d0	39	struct clk *rtc_src_clk;
5a5b614b	40	bool alarm_enabled;
19be09f5	41
6b72086d	42	const struct s3c_rtc_data *data;
1add6781	43
19be09f5	44	int irq_alarm;
5a5b614b	45	spinlock_t alarm_lock;
1add6781	46
19be09f5 CC	47	bool wake_en;
	48	};
	49
ae05c950	50	struct s3c_rtc_data {
df9e26d0	51	bool needs_src_clk;
ae05c950 CC	52
ae05c950 CC	53	void (irq_handler) (struct s3c_rtc info, int mask);
ae05c950 CC	54	void (enable) (struct s3c_rtc info);
	55	void (disable) (struct s3c_rtc info);
	56	};
	57
498bcf31	58	static int s3c_rtc_enable_clk(struct s3c_rtc *info)
88cee8fd	59	{
5a5b614b	60	int ret;
88cee8fd	61
5a5b614b MS	62	ret = clk_enable(info->rtc_clk);
	63	if (ret)
	64	return ret;
498bcf31	65
5a5b614b MS	66	if (info->data->needs_src_clk) {
	67	ret = clk_enable(info->rtc_src_clk);
	68	if (ret) {
	69	clk_disable(info->rtc_clk);
	70	return ret;
498bcf31	71	}
1fb1c35f	72	}
5a5b614b	73	return 0;
24e14554 CC	74	}
	75
	76	static void s3c_rtc_disable_clk(struct s3c_rtc *info)
	77	{
5a5b614b MS	78	if (info->data->needs_src_clk)
	79	clk_disable(info->rtc_src_clk);
	80	clk_disable(info->rtc_clk);
88cee8fd DK	81	}
88cee8fd DK	82
ce9af893	83	/* IRQ Handler */
ae05c950	84	static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
1add6781	85	{
19be09f5	86	struct s3c_rtc info = (struct s3c_rtc )id;
1add6781	87
ae05c950 CC	88	if (info->data->irq_handler)
ae05c950 CC	89	info->data->irq_handler(info, S3C2410_INTP_ALM);
2f3478f6	90
1add6781 BD	91	return IRQ_HANDLED;
	92	}
	93
	94	/* Update control registers */
2ec38a03	95	static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
1add6781	96	{
19be09f5	97	struct s3c_rtc *info = dev_get_drvdata(dev);
5a5b614b	98	unsigned long flags;
1add6781	99	unsigned int tmp;
498bcf31	100	int ret;
1add6781	101
19be09f5	102	dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
1add6781	103
498bcf31 KK	104	ret = s3c_rtc_enable_clk(info);
	105	if (ret)
	106	return ret;
24e14554	107
19be09f5	108	tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
1add6781	109
2ec38a03	110	if (enabled)
1add6781 BD	111	tmp \|= S3C2410_RTCALM_ALMEN;
1add6781 BD	112
19be09f5	113	writeb(tmp, info->base + S3C2410_RTCALM);
2ec38a03	114
5a5b614b	115	spin_lock_irqsave(&info->alarm_lock, flags);
88cee8fd	116
5a5b614b	117	if (info->alarm_enabled && !enabled)
1fb1c35f	118	s3c_rtc_disable_clk(info);
5a5b614b MS	119	else if (!info->alarm_enabled && enabled)
5a5b614b MS	120	ret = s3c_rtc_enable_clk(info);
1fb1c35f	121
5a5b614b MS	122	info->alarm_enabled = enabled;
	123	spin_unlock_irqrestore(&info->alarm_lock, flags);
	124
	125	s3c_rtc_disable_clk(info);
	126
	127	return ret;
1add6781 BD	128	}
1add6781 BD	129
e4a1444e SP	130	/* Read time from RTC and convert it from BCD */
e4a1444e SP	131	static int s3c_rtc_read_time(struct s3c_rtc info, struct rtc_time tm)
1add6781 BD	132	{
1add6781 BD	133	unsigned int have_retried = 0;
498bcf31	134	int ret;
1add6781	135
498bcf31 KK	136	ret = s3c_rtc_enable_clk(info);
	137	if (ret)
	138	return ret;
df9e26d0	139
fc1afe60	140	retry_get_time:
e4a1444e SP	141	tm->tm_min = readb(info->base + S3C2410_RTCMIN);
	142	tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
	143	tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
	144	tm->tm_mon = readb(info->base + S3C2410_RTCMON);
	145	tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
	146	tm->tm_sec = readb(info->base + S3C2410_RTCSEC);
	147
	148	/*
	149	* The only way to work out whether the system was mid-update
1add6781 BD	150	* when we read it is to check the second counter, and if it
	151	* is zero, then we re-try the entire read
	152	*/
e4a1444e	153	if (tm->tm_sec == 0 && !have_retried) {
1add6781 BD	154	have_retried = 1;
	155	goto retry_get_time;
	156	}
	157
24e14554 CC	158	s3c_rtc_disable_clk(info);
24e14554 CC	159
e4a1444e SP	160	tm->tm_sec = bcd2bin(tm->tm_sec);
	161	tm->tm_min = bcd2bin(tm->tm_min);
	162	tm->tm_hour = bcd2bin(tm->tm_hour);
	163	tm->tm_mday = bcd2bin(tm->tm_mday);
	164	tm->tm_mon = bcd2bin(tm->tm_mon);
	165	tm->tm_year = bcd2bin(tm->tm_year);
1add6781	166
22652ba7	167	return 0;
1add6781 BD	168	}
1add6781 BD	169
e4a1444e SP	170	/* Convert time to BCD and write it to RTC */
e4a1444e SP	171	static int s3c_rtc_write_time(struct s3c_rtc info, const struct rtc_time tm)
1add6781	172	{
498bcf31	173	int ret;
9a654518	174
498bcf31 KK	175	ret = s3c_rtc_enable_clk(info);
	176	if (ret)
	177	return ret;
19be09f5 CC	178
	179	writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC);
	180	writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN);
	181	writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
	182	writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
e4a1444e SP	183	writeb(bin2bcd(tm->tm_mon), info->base + S3C2410_RTCMON);
e4a1444e SP	184	writeb(bin2bcd(tm->tm_year), info->base + S3C2410_RTCYEAR);
19be09f5	185
24e14554	186	s3c_rtc_disable_clk(info);
1add6781 BD	187
	188	return 0;
	189	}
	190
e4a1444e SP	191	static int s3c_rtc_gettime(struct device dev, struct rtc_time tm)
	192	{
	193	struct s3c_rtc *info = dev_get_drvdata(dev);
	194	int ret;
	195
	196	ret = s3c_rtc_read_time(info, tm);
	197	if (ret)
	198	return ret;
	199
	200	/* Convert internal representation to actual date/time */
	201	tm->tm_year += 100;
	202	tm->tm_mon -= 1;
	203
	204	dev_dbg(dev, "read time %ptR\n", tm);
	205	return 0;
	206	}
	207
	208	static int s3c_rtc_settime(struct device dev, struct rtc_time tm)
	209	{
	210	struct s3c_rtc *info = dev_get_drvdata(dev);
	211	struct rtc_time rtc_tm = *tm;
	212
	213	dev_dbg(dev, "set time %ptR\n", tm);
	214
	215	/*
	216	* Convert actual date/time to internal representation.
	217	* We get around Y2K by simply not supporting it.
	218	*/
	219	rtc_tm.tm_year -= 100;
	220	rtc_tm.tm_mon += 1;
	221
e4a1444e SP	222	return s3c_rtc_write_time(info, &rtc_tm);
	223	}
	224
1add6781 BD	225	static int s3c_rtc_getalarm(struct device dev, struct rtc_wkalrm alrm)
1add6781 BD	226	{
19be09f5	227	struct s3c_rtc *info = dev_get_drvdata(dev);
1add6781 BD	228	struct rtc_time *alm_tm = &alrm->time;
1add6781 BD	229	unsigned int alm_en;
498bcf31	230	int ret;
1add6781	231
498bcf31 KK	232	ret = s3c_rtc_enable_clk(info);
	233	if (ret)
	234	return ret;
df9e26d0	235
19be09f5 CC	236	alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
	237	alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
	238	alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
	239	alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON);
	240	alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
	241	alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
1add6781	242
19be09f5	243	alm_en = readb(info->base + S3C2410_RTCALM);
1add6781	244
24e14554 CC	245	s3c_rtc_disable_clk(info);
24e14554 CC	246
a2db8dfc DB	247	alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
a2db8dfc DB	248
9a1bacf4	249	dev_dbg(dev, "read alarm %d, %ptR\n", alm_en, alm_tm);
1add6781	250
1add6781	251	/* decode the alarm enable field */
1add6781	252	if (alm_en & S3C2410_RTCALM_SECEN)
fe20ba70	253	alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
1add6781 BD	254
1add6781 BD	255	if (alm_en & S3C2410_RTCALM_MINEN)
fe20ba70	256	alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
1add6781 BD	257
1add6781 BD	258	if (alm_en & S3C2410_RTCALM_HOUREN)
fe20ba70	259	alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
1add6781 BD	260
1add6781 BD	261	if (alm_en & S3C2410_RTCALM_DAYEN)
fe20ba70	262	alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
1add6781 BD	263
1add6781 BD	264	if (alm_en & S3C2410_RTCALM_MONEN) {
fe20ba70	265	alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
1add6781	266	alm_tm->tm_mon -= 1;
1add6781 BD	267	}
	268
	269	if (alm_en & S3C2410_RTCALM_YEAREN)
fe20ba70	270	alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
1add6781 BD	271
	272	return 0;
	273	}
	274
	275	static int s3c_rtc_setalarm(struct device dev, struct rtc_wkalrm alrm)
	276	{
19be09f5	277	struct s3c_rtc *info = dev_get_drvdata(dev);
1add6781 BD	278	struct rtc_time *tm = &alrm->time;
1add6781 BD	279	unsigned int alrm_en;
498bcf31	280	int ret;
1add6781	281
9a1bacf4	282	dev_dbg(dev, "s3c_rtc_setalarm: %d, %ptR\n", alrm->enabled, tm);
1add6781	283
498bcf31 KK	284	ret = s3c_rtc_enable_clk(info);
	285	if (ret)
	286	return ret;
24e14554	287
19be09f5 CC	288	alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
19be09f5 CC	289	writeb(0x00, info->base + S3C2410_RTCALM);
1add6781 BD	290
	291	if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
	292	alrm_en \|= S3C2410_RTCALM_SECEN;
19be09f5	293	writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC);
1add6781 BD	294	}
	295
	296	if (tm->tm_min < 60 && tm->tm_min >= 0) {
	297	alrm_en \|= S3C2410_RTCALM_MINEN;
19be09f5	298	writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN);
1add6781 BD	299	}
	300
	301	if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
	302	alrm_en \|= S3C2410_RTCALM_HOUREN;
19be09f5	303	writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
1add6781 BD	304	}
1add6781 BD	305
fb4ac3c1 KK	306	if (tm->tm_mon < 12 && tm->tm_mon >= 0) {
	307	alrm_en \|= S3C2410_RTCALM_MONEN;
	308	writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON);
	309	}
	310
	311	if (tm->tm_mday <= 31 && tm->tm_mday >= 1) {
	312	alrm_en \|= S3C2410_RTCALM_DAYEN;
	313	writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE);
	314	}
	315
d4a48c2a	316	dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
1add6781	317
19be09f5	318	writeb(alrm_en, info->base + S3C2410_RTCALM);
1add6781	319
24e14554	320	s3c_rtc_setaie(dev, alrm->enabled);
19be09f5	321
5a5b614b MS	322	s3c_rtc_disable_clk(info);
5a5b614b MS	323
1add6781 BD	324	return 0;
	325	}
	326
ff8371ac	327	static const struct rtc_class_ops s3c_rtcops = {
1add6781 BD	328	.read_time = s3c_rtc_gettime,
	329	.set_time = s3c_rtc_settime,
	330	.read_alarm = s3c_rtc_getalarm,
	331	.set_alarm = s3c_rtc_setalarm,
e6eb524e	332	.alarm_irq_enable = s3c_rtc_setaie,
1add6781 BD	333	};
1add6781 BD	334
ae05c950	335	static void s3c24xx_rtc_enable(struct s3c_rtc *info)
1add6781	336	{
d67288da	337	unsigned int con, tmp;
1add6781	338
d67288da	339	con = readw(info->base + S3C2410_RTCCON);
ae05c950 CC	340	/* re-enable the device, and check it is ok */
	341	if ((con & S3C2410_RTCCON_RTCEN) == 0) {
	342	dev_info(info->dev, "rtc disabled, re-enabling\n");
1add6781	343
ae05c950	344	tmp = readw(info->base + S3C2410_RTCCON);
fc1afe60	345	writew(tmp \| S3C2410_RTCCON_RTCEN, info->base + S3C2410_RTCCON);
ae05c950	346	}
1add6781	347
ae05c950 CC	348	if (con & S3C2410_RTCCON_CNTSEL) {
ae05c950 CC	349	dev_info(info->dev, "removing RTCCON_CNTSEL\n");
1add6781	350
ae05c950 CC	351	tmp = readw(info->base + S3C2410_RTCCON);
ae05c950 CC	352	writew(tmp & ~S3C2410_RTCCON_CNTSEL,
fc1afe60	353	info->base + S3C2410_RTCCON);
ae05c950	354	}
1add6781	355
ae05c950 CC	356	if (con & S3C2410_RTCCON_CLKRST) {
ae05c950 CC	357	dev_info(info->dev, "removing RTCCON_CLKRST\n");
1add6781	358
ae05c950 CC	359	tmp = readw(info->base + S3C2410_RTCCON);
ae05c950 CC	360	writew(tmp & ~S3C2410_RTCCON_CLKRST,
fc1afe60	361	info->base + S3C2410_RTCCON);
1add6781	362	}
ae05c950 CC	363	}
	364
	365	static void s3c24xx_rtc_disable(struct s3c_rtc *info)
	366	{
	367	unsigned int con;
	368
ae05c950 CC	369	con = readw(info->base + S3C2410_RTCCON);
	370	con &= ~S3C2410_RTCCON_RTCEN;
	371	writew(con, info->base + S3C2410_RTCCON);
	372
	373	con = readb(info->base + S3C2410_TICNT);
	374	con &= ~S3C2410_TICNT_ENABLE;
	375	writeb(con, info->base + S3C2410_TICNT);
ae05c950 CC	376	}
	377
	378	static void s3c6410_rtc_disable(struct s3c_rtc *info)
	379	{
	380	unsigned int con;
	381
ae05c950 CC	382	con = readw(info->base + S3C2410_RTCCON);
	383	con &= ~S3C64XX_RTCCON_TICEN;
	384	con &= ~S3C2410_RTCCON_RTCEN;
	385	writew(con, info->base + S3C2410_RTCCON);
1add6781 BD	386	}
1add6781 BD	387
19be09f5	388	static int s3c_rtc_remove(struct platform_device *pdev)
1add6781	389	{
19be09f5 CC	390	struct s3c_rtc *info = platform_get_drvdata(pdev);
	391
	392	s3c_rtc_setaie(info->dev, 0);
1add6781	393
7f23a936 JS	394	if (info->data->needs_src_clk)
7f23a936 JS	395	clk_unprepare(info->rtc_src_clk);
19be09f5	396	clk_unprepare(info->rtc_clk);
e48add8c	397
1add6781 BD	398	return 0;
	399	}
	400
5a167f45	401	static int s3c_rtc_probe(struct platform_device *pdev)
1add6781	402	{
19be09f5	403	struct s3c_rtc *info = NULL;
1add6781 BD	404	int ret;
1add6781 BD	405
19be09f5 CC	406	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	407	if (!info)
	408	return -ENOMEM;
1add6781	409
19be09f5	410	info->dev = &pdev->dev;
64704c92	411	info->data = of_device_get_match_data(&pdev->dev);
ae05c950 CC	412	if (!info->data) {
	413	dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
	414	return -EINVAL;
	415	}
5a5b614b	416	spin_lock_init(&info->alarm_lock);
19be09f5 CC	417
	418	platform_set_drvdata(pdev, info);
	419
	420	info->irq_alarm = platform_get_irq(pdev, 0);
faac9102	421	if (info->irq_alarm < 0)
19be09f5	422	return info->irq_alarm;
1add6781	423
ce9af893	424	dev_dbg(&pdev->dev, "s3c2410_rtc: alarm irq %d\n", info->irq_alarm);
1add6781 BD	425
1add6781 BD	426	/* get the memory region */
09ef18bc	427	info->base = devm_platform_ioremap_resource(pdev, 0);
19be09f5 CC	428	if (IS_ERR(info->base))
19be09f5 CC	429	return PTR_ERR(info->base);
1add6781	430
19be09f5	431	info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
eb633de6 YY	432	if (IS_ERR(info->rtc_clk))
	433	return dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_clk),
	434	"failed to find rtc clock\n");
9903f68a KK	435	ret = clk_prepare_enable(info->rtc_clk);
	436	if (ret)
	437	return ret;
e48add8c	438
eaf3a659 MS	439	if (info->data->needs_src_clk) {
	440	info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
	441	if (IS_ERR(info->rtc_src_clk)) {
c52d270c KK	442	ret = dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_src_clk),
c52d270c KK	443	"failed to find rtc source clock\n");
8768e7b3	444	goto err_src_clk;
eaf3a659	445	}
9903f68a KK	446	ret = clk_prepare_enable(info->rtc_src_clk);
	447	if (ret)
	448	goto err_src_clk;
df9e26d0	449	}
df9e26d0	450
31b16d97 MS	451	/* disable RTC enable bits potentially set by the bootloader */
	452	if (info->data->disable)
	453	info->data->disable(info);
	454
1add6781	455	/* check to see if everything is setup correctly */
ae05c950 CC	456	if (info->data->enable)
ae05c950 CC	457	info->data->enable(info);
1add6781	458
d4a48c2a	459	dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
fc1afe60	460	readw(info->base + S3C2410_RTCCON));
1add6781	461
51b7616e YK	462	device_init_wakeup(&pdev->dev, 1);
51b7616e YK	463
dba28c37	464	info->rtc = devm_rtc_allocate_device(&pdev->dev);
19be09f5	465	if (IS_ERR(info->rtc)) {
19be09f5	466	ret = PTR_ERR(info->rtc);
1add6781 BD	467	goto err_nortc;
	468	}
	469
dba28c37	470	info->rtc->ops = &s3c_rtcops;
a5feda3b SP	471	info->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
a5feda3b SP	472	info->rtc->range_max = RTC_TIMESTAMP_END_2099;
dba28c37 SP	473
	474	ret = devm_rtc_register_device(info->rtc);
	475	if (ret)
	476	goto err_nortc;
	477
19be09f5	478	ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
fc1afe60	479	0, "s3c2410-rtc alarm", info);
19be09f5 CC	480	if (ret) {
	481	dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
	482	goto err_nortc;
	483	}
eaa6e4dd	484
5a5b614b MS	485	s3c_rtc_disable_clk(info);
5a5b614b MS	486
1add6781 BD	487	return 0;
1add6781 BD	488
fc1afe60	489	err_nortc:
ae05c950 CC	490	if (info->data->disable)
ae05c950 CC	491	info->data->disable(info);
24e14554 CC	492
	493	if (info->data->needs_src_clk)
	494	clk_disable_unprepare(info->rtc_src_clk);
8768e7b3	495	err_src_clk:
19be09f5	496	clk_disable_unprepare(info->rtc_clk);
1add6781	497
1add6781 BD	498	return ret;
	499	}
	500
32e445aa	501	#ifdef CONFIG_PM_SLEEP
1add6781	502
32e445aa	503	static int s3c_rtc_suspend(struct device *dev)
1add6781	504	{
19be09f5	505	struct s3c_rtc *info = dev_get_drvdata(dev);
498bcf31	506	int ret;
32e445aa	507
498bcf31 KK	508	ret = s3c_rtc_enable_clk(info);
	509	if (ret)
	510	return ret;
ae05c950	511
ae05c950 CC	512	if (info->data->disable)
ae05c950 CC	513	info->data->disable(info);
f501ed52	514
19be09f5 CC	515	if (device_may_wakeup(dev) && !info->wake_en) {
	516	if (enable_irq_wake(info->irq_alarm) == 0)
	517	info->wake_en = true;
52cd4e5c	518	else
32e445aa	519	dev_err(dev, "enable_irq_wake failed\n");
52cd4e5c	520	}
ae05c950	521
1add6781 BD	522	return 0;
	523	}
	524
32e445aa	525	static int s3c_rtc_resume(struct device *dev)
1add6781	526	{
19be09f5	527	struct s3c_rtc *info = dev_get_drvdata(dev);
9f4123b7	528
ae05c950 CC	529	if (info->data->enable)
	530	info->data->enable(info);
	531
24e14554 CC	532	s3c_rtc_disable_clk(info);
24e14554 CC	533
19be09f5 CC	534	if (device_may_wakeup(dev) && info->wake_en) {
	535	disable_irq_wake(info->irq_alarm);
	536	info->wake_en = false;
52cd4e5c	537	}
ae05c950	538
1add6781 BD	539	return 0;
1add6781 BD	540	}
1add6781	541	#endif
32e445aa JH	542	static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
32e445aa JH	543
ae05c950 CC	544	static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
ae05c950 CC	545	{
ae05c950	546	rtc_update_irq(info->rtc, 1, RTC_AF \| RTC_IRQF);
ae05c950 CC	547	}
	548
	549	static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
	550	{
ae05c950 CC	551	rtc_update_irq(info->rtc, 1, RTC_AF \| RTC_IRQF);
ae05c950 CC	552	writeb(mask, info->base + S3C2410_INTP);
ae05c950 CC	553	}
ae05c950 CC	554
ae05c950	555	static struct s3c_rtc_data const s3c2410_rtc_data = {
ae05c950	556	.irq_handler = s3c24xx_rtc_irq,
ae05c950 CC	557	.enable = s3c24xx_rtc_enable,
	558	.disable = s3c24xx_rtc_disable,
	559	};
	560
	561	static struct s3c_rtc_data const s3c2416_rtc_data = {
ae05c950	562	.irq_handler = s3c24xx_rtc_irq,
ae05c950 CC	563	.enable = s3c24xx_rtc_enable,
	564	.disable = s3c24xx_rtc_disable,
	565	};
	566
	567	static struct s3c_rtc_data const s3c2443_rtc_data = {
ae05c950	568	.irq_handler = s3c24xx_rtc_irq,
ae05c950 CC	569	.enable = s3c24xx_rtc_enable,
	570	.disable = s3c24xx_rtc_disable,
	571	};
	572
	573	static struct s3c_rtc_data const s3c6410_rtc_data = {
8792f777	574	.needs_src_clk = true,
ae05c950	575	.irq_handler = s3c6410_rtc_irq,
ae05c950 CC	576	.enable = s3c24xx_rtc_enable,
ae05c950 CC	577	.disable = s3c6410_rtc_disable,
c3cba928 TB	578	};
c3cba928 TB	579
7d6bec28	580	static const __maybe_unused struct of_device_id s3c_rtc_dt_match[] = {
d2524caa	581	{
cd1e6f9e	582	.compatible = "samsung,s3c2410-rtc",
21df6fed	583	.data = &s3c2410_rtc_data,
25c1a246	584	}, {
cd1e6f9e	585	.compatible = "samsung,s3c2416-rtc",
21df6fed	586	.data = &s3c2416_rtc_data,
25c1a246	587	}, {
cd1e6f9e	588	.compatible = "samsung,s3c2443-rtc",
21df6fed	589	.data = &s3c2443_rtc_data,
d2524caa	590	}, {
cd1e6f9e	591	.compatible = "samsung,s3c6410-rtc",
21df6fed	592	.data = &s3c6410_rtc_data,
df9e26d0 CC	593	}, {
df9e26d0 CC	594	.compatible = "samsung,exynos3250-rtc",
21df6fed	595	.data = &s3c6410_rtc_data,
d2524caa	596	},
ae05c950	597	{ /* sentinel */ },
39ce4084 TA	598	};
39ce4084 TA	599	MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
9f4123b7 MC	600
9f4123b7 MC	601	static struct platform_driver s3c_rtc_driver = {
1add6781	602	.probe = s3c_rtc_probe,
5a167f45	603	.remove = s3c_rtc_remove,
1add6781	604	.driver = {
9f4123b7	605	.name = "s3c-rtc",
32e445aa	606	.pm = &s3c_rtc_pm_ops,
04a373fd	607	.of_match_table = of_match_ptr(s3c_rtc_dt_match),
1add6781 BD	608	},
1add6781 BD	609	};
0c4eae66	610	module_platform_driver(s3c_rtc_driver);
1add6781 BD	611
	612	MODULE_DESCRIPTION("Samsung S3C RTC Driver");
	613	MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
	614	MODULE_LICENSE("GPL");
ad28a07b	615	MODULE_ALIAS("platform:s3c2410-rtc");