[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/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 void 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);
}

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_new	= 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>
dbd9acbe SK	26	#include <linux/uaccess.h>
dbd9acbe SK	27	#include <linux/io.h>
1add6781	28
1add6781	29	#include <asm/irq.h>
b9d7c5d3	30	#include "rtc-s3c.h"
1add6781	31
19be09f5 CC	32	struct s3c_rtc {
	33	struct device *dev;
	34	struct rtc_device *rtc;
	35
	36	void __iomem *base;
	37	struct clk *rtc_clk;
df9e26d0	38	struct clk *rtc_src_clk;
5a5b614b	39	bool alarm_enabled;
19be09f5	40
6b72086d	41	const struct s3c_rtc_data *data;
1add6781	42
19be09f5	43	int irq_alarm;
5a5b614b	44	spinlock_t alarm_lock;
1add6781	45
19be09f5 CC	46	bool wake_en;
	47	};
	48
ae05c950	49	struct s3c_rtc_data {
df9e26d0	50	bool needs_src_clk;
ae05c950 CC	51
ae05c950 CC	52	void (irq_handler) (struct s3c_rtc info, int mask);
ae05c950 CC	53	void (enable) (struct s3c_rtc info);
	54	void (disable) (struct s3c_rtc info);
	55	};
	56
498bcf31	57	static int s3c_rtc_enable_clk(struct s3c_rtc *info)
88cee8fd	58	{
5a5b614b	59	int ret;
88cee8fd	60
5a5b614b MS	61	ret = clk_enable(info->rtc_clk);
	62	if (ret)
	63	return ret;
498bcf31	64
5a5b614b MS	65	if (info->data->needs_src_clk) {
	66	ret = clk_enable(info->rtc_src_clk);
	67	if (ret) {
	68	clk_disable(info->rtc_clk);
	69	return ret;
498bcf31	70	}
1fb1c35f	71	}
5a5b614b	72	return 0;
24e14554 CC	73	}
	74
	75	static void s3c_rtc_disable_clk(struct s3c_rtc *info)
	76	{
5a5b614b MS	77	if (info->data->needs_src_clk)
	78	clk_disable(info->rtc_src_clk);
	79	clk_disable(info->rtc_clk);
88cee8fd DK	80	}
88cee8fd DK	81
ce9af893	82	/* IRQ Handler */
ae05c950	83	static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
1add6781	84	{
19be09f5	85	struct s3c_rtc info = (struct s3c_rtc )id;
1add6781	86
ae05c950 CC	87	if (info->data->irq_handler)
ae05c950 CC	88	info->data->irq_handler(info, S3C2410_INTP_ALM);
2f3478f6	89
1add6781 BD	90	return IRQ_HANDLED;
	91	}
	92
	93	/* Update control registers */
2ec38a03	94	static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
1add6781	95	{
19be09f5	96	struct s3c_rtc *info = dev_get_drvdata(dev);
5a5b614b	97	unsigned long flags;
1add6781	98	unsigned int tmp;
498bcf31	99	int ret;
1add6781	100
19be09f5	101	dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
1add6781	102
498bcf31 KK	103	ret = s3c_rtc_enable_clk(info);
	104	if (ret)
	105	return ret;
24e14554	106
19be09f5	107	tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
1add6781	108
2ec38a03	109	if (enabled)
1add6781 BD	110	tmp \|= S3C2410_RTCALM_ALMEN;
1add6781 BD	111
19be09f5	112	writeb(tmp, info->base + S3C2410_RTCALM);
2ec38a03	113
5a5b614b	114	spin_lock_irqsave(&info->alarm_lock, flags);
88cee8fd	115
5a5b614b	116	if (info->alarm_enabled && !enabled)
1fb1c35f	117	s3c_rtc_disable_clk(info);
5a5b614b MS	118	else if (!info->alarm_enabled && enabled)
5a5b614b MS	119	ret = s3c_rtc_enable_clk(info);
1fb1c35f	120
5a5b614b MS	121	info->alarm_enabled = enabled;
	122	spin_unlock_irqrestore(&info->alarm_lock, flags);
	123
	124	s3c_rtc_disable_clk(info);
	125
	126	return ret;
1add6781 BD	127	}
1add6781 BD	128
e4a1444e SP	129	/* Read time from RTC and convert it from BCD */
e4a1444e SP	130	static int s3c_rtc_read_time(struct s3c_rtc info, struct rtc_time tm)
1add6781 BD	131	{
1add6781 BD	132	unsigned int have_retried = 0;
498bcf31	133	int ret;
1add6781	134
498bcf31 KK	135	ret = s3c_rtc_enable_clk(info);
	136	if (ret)
	137	return ret;
df9e26d0	138
fc1afe60	139	retry_get_time:
e4a1444e SP	140	tm->tm_min = readb(info->base + S3C2410_RTCMIN);
	141	tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
	142	tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
	143	tm->tm_mon = readb(info->base + S3C2410_RTCMON);
	144	tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
	145	tm->tm_sec = readb(info->base + S3C2410_RTCSEC);
	146
	147	/*
	148	* The only way to work out whether the system was mid-update
1add6781 BD	149	* when we read it is to check the second counter, and if it
	150	* is zero, then we re-try the entire read
	151	*/
e4a1444e	152	if (tm->tm_sec == 0 && !have_retried) {
1add6781 BD	153	have_retried = 1;
	154	goto retry_get_time;
	155	}
	156
24e14554 CC	157	s3c_rtc_disable_clk(info);
24e14554 CC	158
e4a1444e SP	159	tm->tm_sec = bcd2bin(tm->tm_sec);
	160	tm->tm_min = bcd2bin(tm->tm_min);
	161	tm->tm_hour = bcd2bin(tm->tm_hour);
	162	tm->tm_mday = bcd2bin(tm->tm_mday);
	163	tm->tm_mon = bcd2bin(tm->tm_mon);
	164	tm->tm_year = bcd2bin(tm->tm_year);
1add6781	165
22652ba7	166	return 0;
1add6781 BD	167	}
1add6781 BD	168
e4a1444e SP	169	/* Convert time to BCD and write it to RTC */
e4a1444e SP	170	static int s3c_rtc_write_time(struct s3c_rtc info, const struct rtc_time tm)
1add6781	171	{
498bcf31	172	int ret;
9a654518	173
498bcf31 KK	174	ret = s3c_rtc_enable_clk(info);
	175	if (ret)
	176	return ret;
19be09f5 CC	177
	178	writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC);
	179	writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN);
	180	writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
	181	writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
e4a1444e SP	182	writeb(bin2bcd(tm->tm_mon), info->base + S3C2410_RTCMON);
e4a1444e SP	183	writeb(bin2bcd(tm->tm_year), info->base + S3C2410_RTCYEAR);
19be09f5	184
24e14554	185	s3c_rtc_disable_clk(info);
1add6781 BD	186
	187	return 0;
	188	}
	189
e4a1444e SP	190	static int s3c_rtc_gettime(struct device dev, struct rtc_time tm)
	191	{
	192	struct s3c_rtc *info = dev_get_drvdata(dev);
	193	int ret;
	194
	195	ret = s3c_rtc_read_time(info, tm);
	196	if (ret)
	197	return ret;
	198
	199	/* Convert internal representation to actual date/time */
	200	tm->tm_year += 100;
	201	tm->tm_mon -= 1;
	202
	203	dev_dbg(dev, "read time %ptR\n", tm);
	204	return 0;
	205	}
	206
	207	static int s3c_rtc_settime(struct device dev, struct rtc_time tm)
	208	{
	209	struct s3c_rtc *info = dev_get_drvdata(dev);
	210	struct rtc_time rtc_tm = *tm;
	211
	212	dev_dbg(dev, "set time %ptR\n", tm);
	213
	214	/*
	215	* Convert actual date/time to internal representation.
	216	* We get around Y2K by simply not supporting it.
	217	*/
	218	rtc_tm.tm_year -= 100;
	219	rtc_tm.tm_mon += 1;
	220
e4a1444e SP	221	return s3c_rtc_write_time(info, &rtc_tm);
	222	}
	223
1add6781 BD	224	static int s3c_rtc_getalarm(struct device dev, struct rtc_wkalrm alrm)
1add6781 BD	225	{
19be09f5	226	struct s3c_rtc *info = dev_get_drvdata(dev);
1add6781 BD	227	struct rtc_time *alm_tm = &alrm->time;
1add6781 BD	228	unsigned int alm_en;
498bcf31	229	int ret;
1add6781	230
498bcf31 KK	231	ret = s3c_rtc_enable_clk(info);
	232	if (ret)
	233	return ret;
df9e26d0	234
19be09f5 CC	235	alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
	236	alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
	237	alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
	238	alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON);
	239	alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
	240	alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
1add6781	241
19be09f5	242	alm_en = readb(info->base + S3C2410_RTCALM);
1add6781	243
24e14554 CC	244	s3c_rtc_disable_clk(info);
24e14554 CC	245
a2db8dfc DB	246	alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
a2db8dfc DB	247
9a1bacf4	248	dev_dbg(dev, "read alarm %d, %ptR\n", alm_en, alm_tm);
1add6781	249
1add6781	250	/* decode the alarm enable field */
1add6781	251	if (alm_en & S3C2410_RTCALM_SECEN)
fe20ba70	252	alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
1add6781 BD	253
1add6781 BD	254	if (alm_en & S3C2410_RTCALM_MINEN)
fe20ba70	255	alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
1add6781 BD	256
1add6781 BD	257	if (alm_en & S3C2410_RTCALM_HOUREN)
fe20ba70	258	alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
1add6781 BD	259
1add6781 BD	260	if (alm_en & S3C2410_RTCALM_DAYEN)
fe20ba70	261	alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
1add6781 BD	262
1add6781 BD	263	if (alm_en & S3C2410_RTCALM_MONEN) {
fe20ba70	264	alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
1add6781	265	alm_tm->tm_mon -= 1;
1add6781 BD	266	}
	267
	268	if (alm_en & S3C2410_RTCALM_YEAREN)
fe20ba70	269	alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
1add6781 BD	270
	271	return 0;
	272	}
	273
	274	static int s3c_rtc_setalarm(struct device dev, struct rtc_wkalrm alrm)
	275	{
19be09f5	276	struct s3c_rtc *info = dev_get_drvdata(dev);
1add6781 BD	277	struct rtc_time *tm = &alrm->time;
1add6781 BD	278	unsigned int alrm_en;
498bcf31	279	int ret;
1add6781	280
9a1bacf4	281	dev_dbg(dev, "s3c_rtc_setalarm: %d, %ptR\n", alrm->enabled, tm);
1add6781	282
498bcf31 KK	283	ret = s3c_rtc_enable_clk(info);
	284	if (ret)
	285	return ret;
24e14554	286
19be09f5 CC	287	alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
19be09f5 CC	288	writeb(0x00, info->base + S3C2410_RTCALM);
1add6781 BD	289
	290	if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
	291	alrm_en \|= S3C2410_RTCALM_SECEN;
19be09f5	292	writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC);
1add6781 BD	293	}
	294
	295	if (tm->tm_min < 60 && tm->tm_min >= 0) {
	296	alrm_en \|= S3C2410_RTCALM_MINEN;
19be09f5	297	writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN);
1add6781 BD	298	}
	299
	300	if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
	301	alrm_en \|= S3C2410_RTCALM_HOUREN;
19be09f5	302	writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
1add6781 BD	303	}
1add6781 BD	304
fb4ac3c1 KK	305	if (tm->tm_mon < 12 && tm->tm_mon >= 0) {
	306	alrm_en \|= S3C2410_RTCALM_MONEN;
	307	writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON);
	308	}
	309
	310	if (tm->tm_mday <= 31 && tm->tm_mday >= 1) {
	311	alrm_en \|= S3C2410_RTCALM_DAYEN;
	312	writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE);
	313	}
	314
d4a48c2a	315	dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
1add6781	316
19be09f5	317	writeb(alrm_en, info->base + S3C2410_RTCALM);
1add6781	318
24e14554	319	s3c_rtc_setaie(dev, alrm->enabled);
19be09f5	320
5a5b614b MS	321	s3c_rtc_disable_clk(info);
5a5b614b MS	322
1add6781 BD	323	return 0;
	324	}
	325
ff8371ac	326	static const struct rtc_class_ops s3c_rtcops = {
1add6781 BD	327	.read_time = s3c_rtc_gettime,
	328	.set_time = s3c_rtc_settime,
	329	.read_alarm = s3c_rtc_getalarm,
	330	.set_alarm = s3c_rtc_setalarm,
e6eb524e	331	.alarm_irq_enable = s3c_rtc_setaie,
1add6781 BD	332	};
1add6781 BD	333
ae05c950	334	static void s3c24xx_rtc_enable(struct s3c_rtc *info)
1add6781	335	{
d67288da	336	unsigned int con, tmp;
1add6781	337
d67288da	338	con = readw(info->base + S3C2410_RTCCON);
ae05c950 CC	339	/* re-enable the device, and check it is ok */
	340	if ((con & S3C2410_RTCCON_RTCEN) == 0) {
	341	dev_info(info->dev, "rtc disabled, re-enabling\n");
1add6781	342
ae05c950	343	tmp = readw(info->base + S3C2410_RTCCON);
fc1afe60	344	writew(tmp \| S3C2410_RTCCON_RTCEN, info->base + S3C2410_RTCCON);
ae05c950	345	}
1add6781	346
ae05c950 CC	347	if (con & S3C2410_RTCCON_CNTSEL) {
ae05c950 CC	348	dev_info(info->dev, "removing RTCCON_CNTSEL\n");
1add6781	349
ae05c950 CC	350	tmp = readw(info->base + S3C2410_RTCCON);
ae05c950 CC	351	writew(tmp & ~S3C2410_RTCCON_CNTSEL,
fc1afe60	352	info->base + S3C2410_RTCCON);
ae05c950	353	}
1add6781	354
ae05c950 CC	355	if (con & S3C2410_RTCCON_CLKRST) {
ae05c950 CC	356	dev_info(info->dev, "removing RTCCON_CLKRST\n");
1add6781	357
ae05c950 CC	358	tmp = readw(info->base + S3C2410_RTCCON);
ae05c950 CC	359	writew(tmp & ~S3C2410_RTCCON_CLKRST,
fc1afe60	360	info->base + S3C2410_RTCCON);
1add6781	361	}
ae05c950 CC	362	}
	363
	364	static void s3c24xx_rtc_disable(struct s3c_rtc *info)
	365	{
	366	unsigned int con;
	367
ae05c950 CC	368	con = readw(info->base + S3C2410_RTCCON);
	369	con &= ~S3C2410_RTCCON_RTCEN;
	370	writew(con, info->base + S3C2410_RTCCON);
	371
	372	con = readb(info->base + S3C2410_TICNT);
	373	con &= ~S3C2410_TICNT_ENABLE;
	374	writeb(con, info->base + S3C2410_TICNT);
ae05c950 CC	375	}
	376
	377	static void s3c6410_rtc_disable(struct s3c_rtc *info)
	378	{
	379	unsigned int con;
	380
ae05c950 CC	381	con = readw(info->base + S3C2410_RTCCON);
	382	con &= ~S3C64XX_RTCCON_TICEN;
	383	con &= ~S3C2410_RTCCON_RTCEN;
	384	writew(con, info->base + S3C2410_RTCCON);
1add6781 BD	385	}
1add6781 BD	386
9e6a2ad1	387	static void s3c_rtc_remove(struct platform_device *pdev)
1add6781	388	{
19be09f5 CC	389	struct s3c_rtc *info = platform_get_drvdata(pdev);
	390
	391	s3c_rtc_setaie(info->dev, 0);
1add6781	392
7f23a936 JS	393	if (info->data->needs_src_clk)
7f23a936 JS	394	clk_unprepare(info->rtc_src_clk);
19be09f5	395	clk_unprepare(info->rtc_clk);
1add6781 BD	396	}
1add6781 BD	397
5a167f45	398	static int s3c_rtc_probe(struct platform_device *pdev)
1add6781	399	{
19be09f5	400	struct s3c_rtc *info = NULL;
1add6781 BD	401	int ret;
1add6781 BD	402
19be09f5 CC	403	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	404	if (!info)
	405	return -ENOMEM;
1add6781	406
19be09f5	407	info->dev = &pdev->dev;
64704c92	408	info->data = of_device_get_match_data(&pdev->dev);
ae05c950 CC	409	if (!info->data) {
	410	dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
	411	return -EINVAL;
	412	}
5a5b614b	413	spin_lock_init(&info->alarm_lock);
19be09f5 CC	414
	415	platform_set_drvdata(pdev, info);
	416
	417	info->irq_alarm = platform_get_irq(pdev, 0);
faac9102	418	if (info->irq_alarm < 0)
19be09f5	419	return info->irq_alarm;
1add6781	420
ce9af893	421	dev_dbg(&pdev->dev, "s3c2410_rtc: alarm irq %d\n", info->irq_alarm);
1add6781 BD	422
1add6781 BD	423	/* get the memory region */
09ef18bc	424	info->base = devm_platform_ioremap_resource(pdev, 0);
19be09f5 CC	425	if (IS_ERR(info->base))
19be09f5 CC	426	return PTR_ERR(info->base);
1add6781	427
19be09f5	428	info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
eb633de6 YY	429	if (IS_ERR(info->rtc_clk))
	430	return dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_clk),
	431	"failed to find rtc clock\n");
9903f68a KK	432	ret = clk_prepare_enable(info->rtc_clk);
	433	if (ret)
	434	return ret;
e48add8c	435
eaf3a659 MS	436	if (info->data->needs_src_clk) {
	437	info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
	438	if (IS_ERR(info->rtc_src_clk)) {
c52d270c KK	439	ret = dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_src_clk),
c52d270c KK	440	"failed to find rtc source clock\n");
8768e7b3	441	goto err_src_clk;
eaf3a659	442	}
9903f68a KK	443	ret = clk_prepare_enable(info->rtc_src_clk);
	444	if (ret)
	445	goto err_src_clk;
df9e26d0	446	}
df9e26d0	447
31b16d97 MS	448	/* disable RTC enable bits potentially set by the bootloader */
	449	if (info->data->disable)
	450	info->data->disable(info);
	451
1add6781	452	/* check to see if everything is setup correctly */
ae05c950 CC	453	if (info->data->enable)
ae05c950 CC	454	info->data->enable(info);
1add6781	455
d4a48c2a	456	dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
fc1afe60	457	readw(info->base + S3C2410_RTCCON));
1add6781	458
51b7616e YK	459	device_init_wakeup(&pdev->dev, 1);
51b7616e YK	460
dba28c37	461	info->rtc = devm_rtc_allocate_device(&pdev->dev);
19be09f5	462	if (IS_ERR(info->rtc)) {
19be09f5	463	ret = PTR_ERR(info->rtc);
1add6781 BD	464	goto err_nortc;
	465	}
	466
dba28c37	467	info->rtc->ops = &s3c_rtcops;
a5feda3b SP	468	info->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
a5feda3b SP	469	info->rtc->range_max = RTC_TIMESTAMP_END_2099;
dba28c37 SP	470
	471	ret = devm_rtc_register_device(info->rtc);
	472	if (ret)
	473	goto err_nortc;
	474
19be09f5	475	ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
fc1afe60	476	0, "s3c2410-rtc alarm", info);
19be09f5 CC	477	if (ret) {
	478	dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
	479	goto err_nortc;
	480	}
eaa6e4dd	481
5a5b614b MS	482	s3c_rtc_disable_clk(info);
5a5b614b MS	483
1add6781 BD	484	return 0;
1add6781 BD	485
fc1afe60	486	err_nortc:
ae05c950 CC	487	if (info->data->disable)
ae05c950 CC	488	info->data->disable(info);
24e14554 CC	489
	490	if (info->data->needs_src_clk)
	491	clk_disable_unprepare(info->rtc_src_clk);
8768e7b3	492	err_src_clk:
19be09f5	493	clk_disable_unprepare(info->rtc_clk);
1add6781	494
1add6781 BD	495	return ret;
	496	}
	497
32e445aa	498	#ifdef CONFIG_PM_SLEEP
1add6781	499
32e445aa	500	static int s3c_rtc_suspend(struct device *dev)
1add6781	501	{
19be09f5	502	struct s3c_rtc *info = dev_get_drvdata(dev);
498bcf31	503	int ret;
32e445aa	504
498bcf31 KK	505	ret = s3c_rtc_enable_clk(info);
	506	if (ret)
	507	return ret;
ae05c950	508
ae05c950 CC	509	if (info->data->disable)
ae05c950 CC	510	info->data->disable(info);
f501ed52	511
19be09f5 CC	512	if (device_may_wakeup(dev) && !info->wake_en) {
	513	if (enable_irq_wake(info->irq_alarm) == 0)
	514	info->wake_en = true;
52cd4e5c	515	else
32e445aa	516	dev_err(dev, "enable_irq_wake failed\n");
52cd4e5c	517	}
ae05c950	518
1add6781 BD	519	return 0;
	520	}
	521
32e445aa	522	static int s3c_rtc_resume(struct device *dev)
1add6781	523	{
19be09f5	524	struct s3c_rtc *info = dev_get_drvdata(dev);
9f4123b7	525
ae05c950 CC	526	if (info->data->enable)
	527	info->data->enable(info);
	528
24e14554 CC	529	s3c_rtc_disable_clk(info);
24e14554 CC	530
19be09f5 CC	531	if (device_may_wakeup(dev) && info->wake_en) {
	532	disable_irq_wake(info->irq_alarm);
	533	info->wake_en = false;
52cd4e5c	534	}
ae05c950	535
1add6781 BD	536	return 0;
1add6781 BD	537	}
1add6781	538	#endif
32e445aa JH	539	static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
32e445aa JH	540
ae05c950 CC	541	static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
ae05c950 CC	542	{
ae05c950	543	rtc_update_irq(info->rtc, 1, RTC_AF \| RTC_IRQF);
ae05c950 CC	544	}
	545
	546	static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
	547	{
ae05c950 CC	548	rtc_update_irq(info->rtc, 1, RTC_AF \| RTC_IRQF);
ae05c950 CC	549	writeb(mask, info->base + S3C2410_INTP);
ae05c950 CC	550	}
ae05c950 CC	551
ae05c950	552	static struct s3c_rtc_data const s3c2410_rtc_data = {
ae05c950	553	.irq_handler = s3c24xx_rtc_irq,
ae05c950 CC	554	.enable = s3c24xx_rtc_enable,
	555	.disable = s3c24xx_rtc_disable,
	556	};
	557
	558	static struct s3c_rtc_data const s3c2416_rtc_data = {
ae05c950	559	.irq_handler = s3c24xx_rtc_irq,
ae05c950 CC	560	.enable = s3c24xx_rtc_enable,
	561	.disable = s3c24xx_rtc_disable,
	562	};
	563
	564	static struct s3c_rtc_data const s3c2443_rtc_data = {
ae05c950	565	.irq_handler = s3c24xx_rtc_irq,
ae05c950 CC	566	.enable = s3c24xx_rtc_enable,
	567	.disable = s3c24xx_rtc_disable,
	568	};
	569
	570	static struct s3c_rtc_data const s3c6410_rtc_data = {
8792f777	571	.needs_src_clk = true,
ae05c950	572	.irq_handler = s3c6410_rtc_irq,
ae05c950 CC	573	.enable = s3c24xx_rtc_enable,
ae05c950 CC	574	.disable = s3c6410_rtc_disable,
c3cba928 TB	575	};
c3cba928 TB	576
7d6bec28	577	static const __maybe_unused struct of_device_id s3c_rtc_dt_match[] = {
d2524caa	578	{
cd1e6f9e	579	.compatible = "samsung,s3c2410-rtc",
21df6fed	580	.data = &s3c2410_rtc_data,
25c1a246	581	}, {
cd1e6f9e	582	.compatible = "samsung,s3c2416-rtc",
21df6fed	583	.data = &s3c2416_rtc_data,
25c1a246	584	}, {
cd1e6f9e	585	.compatible = "samsung,s3c2443-rtc",
21df6fed	586	.data = &s3c2443_rtc_data,
d2524caa	587	}, {
cd1e6f9e	588	.compatible = "samsung,s3c6410-rtc",
21df6fed	589	.data = &s3c6410_rtc_data,
df9e26d0 CC	590	}, {
df9e26d0 CC	591	.compatible = "samsung,exynos3250-rtc",
21df6fed	592	.data = &s3c6410_rtc_data,
d2524caa	593	},
ae05c950	594	{ /* sentinel */ },
39ce4084 TA	595	};
39ce4084 TA	596	MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
9f4123b7 MC	597
9f4123b7 MC	598	static struct platform_driver s3c_rtc_driver = {
1add6781	599	.probe = s3c_rtc_probe,
9e6a2ad1	600	.remove_new = s3c_rtc_remove,
1add6781	601	.driver = {
9f4123b7	602	.name = "s3c-rtc",
32e445aa	603	.pm = &s3c_rtc_pm_ops,
04a373fd	604	.of_match_table = of_match_ptr(s3c_rtc_dt_match),
1add6781 BD	605	},
1add6781 BD	606	};
0c4eae66	607	module_platform_driver(s3c_rtc_driver);
1add6781 BD	608
	609	MODULE_DESCRIPTION("Samsung S3C RTC Driver");
	610	MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
	611	MODULE_LICENSE("GPL");
ad28a07b	612	MODULE_ALIAS("platform:s3c2410-rtc");