Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 739 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
new file mode 100644
index 00000000..3f3a2975
--- /dev/null
+++ b/drivers/rtc/rtc-s3c.c
@@ -0,0 +1,739 @@
+/* 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/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 <mach/hardware.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <plat/regs-rtc.h>
+
+enum s3c_cpu_type {
+	TYPE_S3C2410,
+	TYPE_S3C2416,
+	TYPE_S3C2443,
+	TYPE_S3C64XX,
+};
+
+struct s3c_rtc_drv_data {
+	int cpu_type;
+};
+
+/* I have yet to find an S3C implementation with more than one
+ * of these rtc blocks in */
+
+static struct resource *s3c_rtc_mem;
+
+static struct clk *rtc_clk;
+static void __iomem *s3c_rtc_base;
+static int s3c_rtc_alarmno = NO_IRQ;
+static int s3c_rtc_tickno  = NO_IRQ;
+static bool wake_en;
+static enum s3c_cpu_type s3c_rtc_cpu_type;
+
+static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
+
+static void s3c_rtc_alarm_clk_enable(bool enable)
+{
+	static DEFINE_SPINLOCK(s3c_rtc_alarm_clk_lock);
+	static bool alarm_clk_enabled;
+	unsigned long irq_flags;
+
+	spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags);
+	if (enable) {
+		if (!alarm_clk_enabled) {
+			clk_enable(rtc_clk);
+			alarm_clk_enabled = true;
+		}
+	} else {
+		if (alarm_clk_enabled) {
+			clk_disable(rtc_clk);
+			alarm_clk_enabled = false;
+		}
+	}
+	spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags);
+}
+
+/* IRQ Handlers */
+
+static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
+{
+	struct rtc_device *rdev = id;
+
+	clk_enable(rtc_clk);
+	rtc_update_irq(rdev, 1, RTC_AF | RTC_IRQF);
+
+	if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+		writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP);
+
+	clk_disable(rtc_clk);
+
+	s3c_rtc_alarm_clk_enable(false);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
+{
+	struct rtc_device *rdev = id;
+
+	clk_enable(rtc_clk);
+	rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
+
+	if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+		writeb(S3C2410_INTP_TIC, s3c_rtc_base + S3C2410_INTP);
+
+	clk_disable(rtc_clk);
+	return IRQ_HANDLED;
+}
+
+/* Update control registers */
+static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
+{
+	unsigned int tmp;
+
+	pr_debug("%s: aie=%d\n", __func__, enabled);
+
+	clk_enable(rtc_clk);
+	tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
+
+	if (enabled)
+		tmp |= S3C2410_RTCALM_ALMEN;
+
+	writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
+	clk_disable(rtc_clk);
+
+	s3c_rtc_alarm_clk_enable(enabled);
+
+	return 0;
+}
+
+static int s3c_rtc_setfreq(struct device *dev, int freq)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
+	unsigned int tmp = 0;
+	int val;
+
+	if (!is_power_of_2(freq))
+		return -EINVAL;
+
+	clk_enable(rtc_clk);
+	spin_lock_irq(&s3c_rtc_pie_lock);
+
+	if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
+		tmp = readb(s3c_rtc_base + S3C2410_TICNT);
+		tmp &= S3C2410_TICNT_ENABLE;
+	}
+
+	val = (rtc_dev->max_user_freq / freq) - 1;
+
+	if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
+		tmp |= S3C2443_TICNT_PART(val);
+		writel(S3C2443_TICNT1_PART(val), s3c_rtc_base + S3C2443_TICNT1);
+
+		if (s3c_rtc_cpu_type == TYPE_S3C2416)
+			writel(S3C2416_TICNT2_PART(val), s3c_rtc_base + S3C2416_TICNT2);
+	} else {
+		tmp |= val;
+	}
+
+	writel(tmp, s3c_rtc_base + S3C2410_TICNT);
+	spin_unlock_irq(&s3c_rtc_pie_lock);
+	clk_disable(rtc_clk);
+
+	return 0;
+}
+
+/* Time read/write */
+
+static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
+{
+	unsigned int have_retried = 0;
+	void __iomem *base = s3c_rtc_base;
+
+	clk_enable(rtc_clk);
+ retry_get_time:
+	rtc_tm->tm_min  = readb(base + S3C2410_RTCMIN);
+	rtc_tm->tm_hour = readb(base + S3C2410_RTCHOUR);
+	rtc_tm->tm_mday = readb(base + S3C2410_RTCDATE);
+	rtc_tm->tm_mon  = readb(base + S3C2410_RTCMON);
+	rtc_tm->tm_year = readb(base + S3C2410_RTCYEAR);
+	rtc_tm->tm_sec  = readb(base + S3C2410_RTCSEC);
+
+	/* the only way to work out wether 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 (rtc_tm->tm_sec == 0 && !have_retried) {
+		have_retried = 1;
+		goto retry_get_time;
+	}
+
+	rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
+	rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
+	rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
+	rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
+	rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
+	rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
+
+	rtc_tm->tm_year += 100;
+
+	pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n",
+		 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
+		 rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
+
+	rtc_tm->tm_mon -= 1;
+
+	clk_disable(rtc_clk);
+	return rtc_valid_tm(rtc_tm);
+}
+
+static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
+{
+	void __iomem *base = s3c_rtc_base;
+	int year = tm->tm_year - 100;
+
+	pr_debug("set time %04d.%02d.%02d %02d:%02d:%02d\n",
+		 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
+		 tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+	/* we get around y2k by simply not supporting it */
+
+	if (year < 0 || year >= 100) {
+		dev_err(dev, "rtc only supports 100 years\n");
+		return -EINVAL;
+	}
+
+	clk_enable(rtc_clk);
+	writeb(bin2bcd(tm->tm_sec),  base + S3C2410_RTCSEC);
+	writeb(bin2bcd(tm->tm_min),  base + S3C2410_RTCMIN);
+	writeb(bin2bcd(tm->tm_hour), base + S3C2410_RTCHOUR);
+	writeb(bin2bcd(tm->tm_mday), base + S3C2410_RTCDATE);
+	writeb(bin2bcd(tm->tm_mon + 1), base + S3C2410_RTCMON);
+	writeb(bin2bcd(year), base + S3C2410_RTCYEAR);
+	clk_disable(rtc_clk);
+
+	return 0;
+}
+
+static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	struct rtc_time *alm_tm = &alrm->time;
+	void __iomem *base = s3c_rtc_base;
+	unsigned int alm_en;
+
+	clk_enable(rtc_clk);
+	alm_tm->tm_sec  = readb(base + S3C2410_ALMSEC);
+	alm_tm->tm_min  = readb(base + S3C2410_ALMMIN);
+	alm_tm->tm_hour = readb(base + S3C2410_ALMHOUR);
+	alm_tm->tm_mon  = readb(base + S3C2410_ALMMON);
+	alm_tm->tm_mday = readb(base + S3C2410_ALMDATE);
+	alm_tm->tm_year = readb(base + S3C2410_ALMYEAR);
+
+	alm_en = readb(base + S3C2410_RTCALM);
+
+	alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
+
+	pr_debug("read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
+		 alm_en,
+		 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
+		 alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
+
+
+	/* decode the alarm enable field */
+
+	if (alm_en & S3C2410_RTCALM_SECEN)
+		alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
+	else
+		alm_tm->tm_sec = -1;
+
+	if (alm_en & S3C2410_RTCALM_MINEN)
+		alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
+	else
+		alm_tm->tm_min = -1;
+
+	if (alm_en & S3C2410_RTCALM_HOUREN)
+		alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
+	else
+		alm_tm->tm_hour = -1;
+
+	if (alm_en & S3C2410_RTCALM_DAYEN)
+		alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
+	else
+		alm_tm->tm_mday = -1;
+
+	if (alm_en & S3C2410_RTCALM_MONEN) {
+		alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
+		alm_tm->tm_mon -= 1;
+	} else {
+		alm_tm->tm_mon = -1;
+	}
+
+	if (alm_en & S3C2410_RTCALM_YEAREN)
+		alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
+	else
+		alm_tm->tm_year = -1;
+
+	clk_disable(rtc_clk);
+	return 0;
+}
+
+static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	struct rtc_time *tm = &alrm->time;
+	void __iomem *base = s3c_rtc_base;
+	unsigned int alrm_en;
+
+	clk_enable(rtc_clk);
+	pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
+		 alrm->enabled,
+		 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
+		 tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+	alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
+	writeb(0x00, base + S3C2410_RTCALM);
+
+	if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
+		alrm_en |= S3C2410_RTCALM_SECEN;
+		writeb(bin2bcd(tm->tm_sec), base + S3C2410_ALMSEC);
+	}
+
+	if (tm->tm_min < 60 && tm->tm_min >= 0) {
+		alrm_en |= S3C2410_RTCALM_MINEN;
+		writeb(bin2bcd(tm->tm_min), base + S3C2410_ALMMIN);
+	}
+
+	if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
+		alrm_en |= S3C2410_RTCALM_HOUREN;
+		writeb(bin2bcd(tm->tm_hour), base + S3C2410_ALMHOUR);
+	}
+
+	pr_debug("setting S3C2410_RTCALM to %08x\n", alrm_en);
+
+	writeb(alrm_en, base + S3C2410_RTCALM);
+
+	s3c_rtc_setaie(dev, alrm->enabled);
+
+	clk_disable(rtc_clk);
+	return 0;
+}
+
+static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
+{
+	unsigned int ticnt;
+
+	clk_enable(rtc_clk);
+	if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
+		ticnt = readw(s3c_rtc_base + S3C2410_RTCCON);
+		ticnt &= S3C64XX_RTCCON_TICEN;
+	} else {
+		ticnt = readb(s3c_rtc_base + S3C2410_TICNT);
+		ticnt &= S3C2410_TICNT_ENABLE;
+	}
+
+	seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt  ? "yes" : "no");
+	clk_disable(rtc_clk);
+	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,
+	.proc		= s3c_rtc_proc,
+	.alarm_irq_enable = s3c_rtc_setaie,
+};
+
+static void s3c_rtc_enable(struct platform_device *pdev, int en)
+{
+	void __iomem *base = s3c_rtc_base;
+	unsigned int tmp;
+
+	if (s3c_rtc_base == NULL)
+		return;
+
+	clk_enable(rtc_clk);
+	if (!en) {
+		tmp = readw(base + S3C2410_RTCCON);
+		if (s3c_rtc_cpu_type == TYPE_S3C64XX)
+			tmp &= ~S3C64XX_RTCCON_TICEN;
+		tmp &= ~S3C2410_RTCCON_RTCEN;
+		writew(tmp, base + S3C2410_RTCCON);
+
+		if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
+			tmp = readb(base + S3C2410_TICNT);
+			tmp &= ~S3C2410_TICNT_ENABLE;
+			writeb(tmp, base + S3C2410_TICNT);
+		}
+	} else {
+		/* re-enable the device, and check it is ok */
+
+		if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
+			dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
+
+			tmp = readw(base + S3C2410_RTCCON);
+			writew(tmp | S3C2410_RTCCON_RTCEN,
+				base + S3C2410_RTCCON);
+		}
+
+		if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
+			dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
+
+			tmp = readw(base + S3C2410_RTCCON);
+			writew(tmp & ~S3C2410_RTCCON_CNTSEL,
+				base + S3C2410_RTCCON);
+		}
+
+		if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
+			dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
+
+			tmp = readw(base + S3C2410_RTCCON);
+			writew(tmp & ~S3C2410_RTCCON_CLKRST,
+				base + S3C2410_RTCCON);
+		}
+	}
+	clk_disable(rtc_clk);
+}
+
+static int __devexit s3c_rtc_remove(struct platform_device *dev)
+{
+	struct rtc_device *rtc = platform_get_drvdata(dev);
+
+	free_irq(s3c_rtc_alarmno, rtc);
+	free_irq(s3c_rtc_tickno, rtc);
+
+	platform_set_drvdata(dev, NULL);
+	rtc_device_unregister(rtc);
+
+	s3c_rtc_setaie(&dev->dev, 0);
+
+	clk_put(rtc_clk);
+	rtc_clk = NULL;
+
+	iounmap(s3c_rtc_base);
+	release_resource(s3c_rtc_mem);
+	kfree(s3c_rtc_mem);
+
+	return 0;
+}
+
+static const struct of_device_id s3c_rtc_dt_match[];
+
+static inline int s3c_rtc_get_driver_data(struct platform_device *pdev)
+{
+#ifdef CONFIG_OF
+	struct s3c_rtc_drv_data *data;
+	if (pdev->dev.of_node) {
+		const struct of_device_id *match;
+		match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
+		data = (struct s3c_rtc_drv_data *) match->data;
+		return data->cpu_type;
+	}
+#endif
+	return platform_get_device_id(pdev)->driver_data;
+}
+
+static int __devinit s3c_rtc_probe(struct platform_device *pdev)
+{
+	struct rtc_device *rtc;
+	struct rtc_time rtc_tm;
+	struct resource *res;
+	int ret;
+	int tmp;
+
+	pr_debug("%s: probe=%p\n", __func__, pdev);
+
+	/* find the IRQs */
+
+	s3c_rtc_tickno = platform_get_irq(pdev, 1);
+	if (s3c_rtc_tickno < 0) {
+		dev_err(&pdev->dev, "no irq for rtc tick\n");
+		return -ENOENT;
+	}
+
+	s3c_rtc_alarmno = platform_get_irq(pdev, 0);
+	if (s3c_rtc_alarmno < 0) {
+		dev_err(&pdev->dev, "no irq for alarm\n");
+		return -ENOENT;
+	}
+
+	pr_debug("s3c2410_rtc: tick irq %d, alarm irq %d\n",
+		 s3c_rtc_tickno, s3c_rtc_alarmno);
+
+	/* get the memory region */
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res == NULL) {
+		dev_err(&pdev->dev, "failed to get memory region resource\n");
+		return -ENOENT;
+	}
+
+	s3c_rtc_mem = request_mem_region(res->start, resource_size(res),
+					 pdev->name);
+
+	if (s3c_rtc_mem == NULL) {
+		dev_err(&pdev->dev, "failed to reserve memory region\n");
+		ret = -ENOENT;
+		goto err_nores;
+	}
+
+	s3c_rtc_base = ioremap(res->start, resource_size(res));
+	if (s3c_rtc_base == NULL) {
+		dev_err(&pdev->dev, "failed ioremap()\n");
+		ret = -EINVAL;
+		goto err_nomap;
+	}
+
+	rtc_clk = clk_get(&pdev->dev, "rtc");
+	if (IS_ERR(rtc_clk)) {
+		dev_err(&pdev->dev, "failed to find rtc clock source\n");
+		ret = PTR_ERR(rtc_clk);
+		rtc_clk = NULL;
+		goto err_clk;
+	}
+
+	clk_enable(rtc_clk);
+
+	/* check to see if everything is setup correctly */
+
+	s3c_rtc_enable(pdev, 1);
+
+	pr_debug("s3c2410_rtc: RTCCON=%02x\n",
+		 readw(s3c_rtc_base + S3C2410_RTCCON));
+
+	device_init_wakeup(&pdev->dev, 1);
+
+	/* register RTC and exit */
+
+	rtc = rtc_device_register("s3c", &pdev->dev, &s3c_rtcops,
+				  THIS_MODULE);
+
+	if (IS_ERR(rtc)) {
+		dev_err(&pdev->dev, "cannot attach rtc\n");
+		ret = PTR_ERR(rtc);
+		goto err_nortc;
+	}
+
+	s3c_rtc_cpu_type = s3c_rtc_get_driver_data(pdev);
+
+	/* Check RTC Time */
+
+	s3c_rtc_gettime(NULL, &rtc_tm);
+
+	if (rtc_valid_tm(&rtc_tm)) {
+		rtc_tm.tm_year	= 100;
+		rtc_tm.tm_mon	= 0;
+		rtc_tm.tm_mday	= 1;
+		rtc_tm.tm_hour	= 0;
+		rtc_tm.tm_min	= 0;
+		rtc_tm.tm_sec	= 0;
+
+		s3c_rtc_settime(NULL, &rtc_tm);
+
+		dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
+	}
+
+	if (s3c_rtc_cpu_type != TYPE_S3C2410)
+		rtc->max_user_freq = 32768;
+	else
+		rtc->max_user_freq = 128;
+
+	if (s3c_rtc_cpu_type == TYPE_S3C2416 || s3c_rtc_cpu_type == TYPE_S3C2443) {
+		tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
+		tmp |= S3C2443_RTCCON_TICSEL;
+		writew(tmp, s3c_rtc_base + S3C2410_RTCCON);
+	}
+
+	platform_set_drvdata(pdev, rtc);
+
+	s3c_rtc_setfreq(&pdev->dev, 1);
+
+	ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
+			  0,  "s3c2410-rtc alarm", rtc);
+	if (ret) {
+		dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
+		goto err_alarm_irq;
+	}
+
+	ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
+			  0,  "s3c2410-rtc tick", rtc);
+	if (ret) {
+		dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
+		free_irq(s3c_rtc_alarmno, rtc);
+		goto err_tick_irq;
+	}
+
+	clk_disable(rtc_clk);
+
+	return 0;
+
+ err_tick_irq:
+	free_irq(s3c_rtc_alarmno, rtc);
+
+ err_alarm_irq:
+	platform_set_drvdata(pdev, NULL);
+	rtc_device_unregister(rtc);
+
+ err_nortc:
+	s3c_rtc_enable(pdev, 0);
+	clk_disable(rtc_clk);
+	clk_put(rtc_clk);
+
+ err_clk:
+	iounmap(s3c_rtc_base);
+
+ err_nomap:
+	release_resource(s3c_rtc_mem);
+
+ err_nores:
+	return ret;
+}
+
+#ifdef CONFIG_PM
+
+/* RTC Power management control */
+
+static int ticnt_save, ticnt_en_save;
+
+static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	clk_enable(rtc_clk);
+	/* save TICNT for anyone using periodic interrupts */
+	ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
+	if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
+		ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON);
+		ticnt_en_save &= S3C64XX_RTCCON_TICEN;
+	}
+	s3c_rtc_enable(pdev, 0);
+
+	if (device_may_wakeup(&pdev->dev) && !wake_en) {
+		if (enable_irq_wake(s3c_rtc_alarmno) == 0)
+			wake_en = true;
+		else
+			dev_err(&pdev->dev, "enable_irq_wake failed\n");
+	}
+	clk_disable(rtc_clk);
+
+	return 0;
+}
+
+static int s3c_rtc_resume(struct platform_device *pdev)
+{
+	unsigned int tmp;
+
+	clk_enable(rtc_clk);
+	s3c_rtc_enable(pdev, 1);
+	writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
+	if (s3c_rtc_cpu_type == TYPE_S3C64XX && ticnt_en_save) {
+		tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
+		writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
+	}
+
+	if (device_may_wakeup(&pdev->dev) && wake_en) {
+		disable_irq_wake(s3c_rtc_alarmno);
+		wake_en = false;
+	}
+	clk_disable(rtc_clk);
+
+	return 0;
+}
+#else
+#define s3c_rtc_suspend NULL
+#define s3c_rtc_resume  NULL
+#endif
+
+static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = {
+	[TYPE_S3C2410] = { TYPE_S3C2410 },
+	[TYPE_S3C2416] = { TYPE_S3C2416 },
+	[TYPE_S3C2443] = { TYPE_S3C2443 },
+	[TYPE_S3C64XX] = { TYPE_S3C64XX },
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id s3c_rtc_dt_match[] = {
+	{
+		.compatible = "samsung,s3c2410-rtc",
+		.data = &s3c_rtc_drv_data_array[TYPE_S3C2410],
+	}, {
+		.compatible = "samsung,s3c2416-rtc",
+		.data = &s3c_rtc_drv_data_array[TYPE_S3C2416],
+	}, {
+		.compatible = "samsung,s3c2443-rtc",
+		.data = &s3c_rtc_drv_data_array[TYPE_S3C2443],
+	}, {
+		.compatible = "samsung,s3c6410-rtc",
+		.data = &s3c_rtc_drv_data_array[TYPE_S3C64XX],
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
+#else
+#define s3c_rtc_dt_match NULL
+#endif
+
+static struct platform_device_id s3c_rtc_driver_ids[] = {
+	{
+		.name		= "s3c2410-rtc",
+		.driver_data	= TYPE_S3C2410,
+	}, {
+		.name		= "s3c2416-rtc",
+		.driver_data	= TYPE_S3C2416,
+	}, {
+		.name		= "s3c2443-rtc",
+		.driver_data	= TYPE_S3C2443,
+	}, {
+		.name		= "s3c64xx-rtc",
+		.driver_data	= TYPE_S3C64XX,
+	},
+	{ }
+};
+
+MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
+
+static struct platform_driver s3c_rtc_driver = {
+	.probe		= s3c_rtc_probe,
+	.remove		= __devexit_p(s3c_rtc_remove),
+	.suspend	= s3c_rtc_suspend,
+	.resume		= s3c_rtc_resume,
+	.id_table	= s3c_rtc_driver_ids,
+	.driver		= {
+		.name	= "s3c-rtc",
+		.owner	= THIS_MODULE,
+		.of_match_table	= 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");