1 files changed, 534 insertions, 321 deletions

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 4958a363b2c7..806072238c00 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -32,155 +32,150 @@
 #include <asm/irq.h>
 #include "rtc-s3c.h"
 
-enum s3c_cpu_type {
-        TYPE_S3C2410,
-        TYPE_S3C2416,
-        TYPE_S3C2443,
-        TYPE_S3C64XX,
-};
+struct s3c_rtc {
+        struct device *dev;
+        struct rtc_device *rtc;
 
-struct s3c_rtc_drv_data {
-        int cpu_type;
-};
+        void __iomem *base;
+        struct clk *rtc_clk;
+        struct clk *rtc_src_clk;
+        bool enabled;
+
+        struct s3c_rtc_data *data;
 
-/* I have yet to find an S3C implementation with more than one
- * of these rtc blocks in */
+        int irq_alarm;
+        int irq_tick;
 
-static struct clk *rtc_clk;
-static void __iomem *s3c_rtc_base;
-static int s3c_rtc_alarmno;
-static int s3c_rtc_tickno;
-static enum s3c_cpu_type s3c_rtc_cpu_type;
+        spinlock_t pie_lock;
+        spinlock_t alarm_clk_lock;
 
-static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
+        int ticnt_save, ticnt_en_save;
+        bool wake_en;
+};
+
+struct s3c_rtc_data {
+        int max_user_freq;
+        bool needs_src_clk;
+
+        void (*irq_handler) (struct s3c_rtc *info, int mask);
+        void (*set_freq) (struct s3c_rtc *info, int freq);
+        void (*enable_tick) (struct s3c_rtc *info, struct seq_file *seq);
+        void (*select_tick_clk) (struct s3c_rtc *info);
+        void (*save_tick_cnt) (struct s3c_rtc *info);
+        void (*restore_tick_cnt) (struct s3c_rtc *info);
+        void (*enable) (struct s3c_rtc *info);
+        void (*disable) (struct s3c_rtc *info);
+};
 
-static void s3c_rtc_alarm_clk_enable(bool enable)
+static void s3c_rtc_alarm_clk_enable(struct s3c_rtc *info, 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);
+        spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
         if (enable) {
-                if (!alarm_clk_enabled) {
-                        clk_enable(rtc_clk);
-                        alarm_clk_enabled = true;
+                if (!info->enabled) {
+                        clk_enable(info->rtc_clk);
+                        if (info->data->needs_src_clk)
+                                clk_enable(info->rtc_src_clk);
+                        info->enabled = true;
                 }
         } else {
-                if (alarm_clk_enabled) {
-                        clk_disable(rtc_clk);
-                        alarm_clk_enabled = false;
+                if (info->enabled) {
+                        if (info->data->needs_src_clk)
+                                clk_disable(info->rtc_src_clk);
+                        clk_disable(info->rtc_clk);
+                        info->enabled = false;
                 }
         }
-        spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags);
+        spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
 }
 
 /* IRQ Handlers */
-
-static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
+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_AF | RTC_IRQF);
-
-        if (s3c_rtc_cpu_type == TYPE_S3C64XX)
-                writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP);
-
-        clk_disable(rtc_clk);
+        struct s3c_rtc *info = (struct s3c_rtc *)id;
 
-        s3c_rtc_alarm_clk_enable(false);
+        if (info->data->irq_handler)
+                info->data->irq_handler(info, S3C2410_INTP_TIC);
 
         return IRQ_HANDLED;
 }
 
-static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
+static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
 {
-        struct rtc_device *rdev = id;
+        struct s3c_rtc *info = (struct s3c_rtc *)id;
 
-        clk_enable(rtc_clk);
-        rtc_update_irq(rdev, 1, RTC_PF | RTC_IRQF);
+        if (info->data->irq_handler)
+                info->data->irq_handler(info, S3C2410_INTP_ALM);
 
-        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)
 {
+        struct s3c_rtc *info = dev_get_drvdata(dev);
         unsigned int tmp;
 
-        dev_dbg(dev, "%s: aie=%d\n", __func__, enabled);
+        dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
 
-        clk_enable(rtc_clk);
-        tmp = readb(s3c_rtc_base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+        tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
 
         if (enabled)
                 tmp |= S3C2410_RTCALM_ALMEN;
 
-        writeb(tmp, s3c_rtc_base + S3C2410_RTCALM);
-        clk_disable(rtc_clk);
+        writeb(tmp, info->base + S3C2410_RTCALM);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 
-        s3c_rtc_alarm_clk_enable(enabled);
+        s3c_rtc_alarm_clk_enable(info, enabled);
 
         return 0;
 }
 
-static int s3c_rtc_setfreq(struct device *dev, int freq)
+/* Set RTC frequency */
+static int s3c_rtc_setfreq(struct s3c_rtc *info, 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);
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+        spin_lock_irq(&info->pie_lock);
 
-        if (s3c_rtc_cpu_type != TYPE_S3C64XX) {
-                tmp = readb(s3c_rtc_base + S3C2410_TICNT);
-                tmp &= S3C2410_TICNT_ENABLE;
-        }
+        if (info->data->set_freq)
+                info->data->set_freq(info, freq);
 
-        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);
+        spin_unlock_irq(&info->pie_lock);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 
         return 0;
 }
 
 /* Time read/write */
-
 static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
 {
+        struct s3c_rtc *info = dev_get_drvdata(dev);
         unsigned int have_retried = 0;
-        void __iomem *base = s3c_rtc_base;
 
-        clk_enable(rtc_clk);
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_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);
+        rtc_tm->tm_min  = readb(info->base + S3C2410_RTCMIN);
+        rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
+        rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
+        rtc_tm->tm_mon  = readb(info->base + S3C2410_RTCMON);
+        rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
+        rtc_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
@@ -207,13 +202,16 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
 
         rtc_tm->tm_mon -= 1;
 
-        clk_disable(rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->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;
+        struct s3c_rtc *info = dev_get_drvdata(dev);
         int year = tm->tm_year - 100;
 
         dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
@@ -227,33 +225,42 @@ static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
                 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);
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+
+        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 + 1), info->base + S3C2410_RTCMON);
+        writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR);
+
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 
         return 0;
 }
 
 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;
-        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);
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
 
-        alm_en = readb(base + S3C2410_RTCALM);
+        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);
 
         alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
 
@@ -297,65 +304,74 @@ static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
         else
                 alm_tm->tm_year = -1;
 
-        clk_disable(rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
+
         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;
-        void __iomem *base = s3c_rtc_base;
         unsigned int alrm_en;
 
-        clk_enable(rtc_clk);
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+
         dev_dbg(dev, "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);
+        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), base + S3C2410_ALMSEC);
+                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), base + S3C2410_ALMMIN);
+                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), base + S3C2410_ALMHOUR);
+                writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
         }
 
         dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
 
-        writeb(alrm_en, base + S3C2410_RTCALM);
+        writeb(alrm_en, info->base + S3C2410_RTCALM);
 
         s3c_rtc_setaie(dev, alrm->enabled);
 
-        clk_disable(rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
+
         return 0;
 }
 
 static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
 {
-        unsigned int ticnt;
+        struct s3c_rtc *info = dev_get_drvdata(dev);
 
-        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;
-        }
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+
+        if (info->data->enable_tick)
+                info->data->enable_tick(info, seq);
+
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 
-        seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt  ? "yes" : "no");
-        clk_disable(rtc_clk);
         return 0;
 }
 
@@ -368,152 +384,201 @@ static const struct rtc_class_ops s3c_rtcops = {
         .alarm_irq_enable = s3c_rtc_setaie,
 };
 
-static void s3c_rtc_enable(struct platform_device *pdev, int en)
+static void s3c24xx_rtc_enable(struct s3c_rtc *info)
 {
-        void __iomem *base = s3c_rtc_base;
-        unsigned int tmp;
+        unsigned int con, 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 */
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
 
-                if ((readw(base+S3C2410_RTCCON) & S3C2410_RTCCON_RTCEN) == 0) {
-                        dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
+        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(base + S3C2410_RTCCON);
-                        writew(tmp | S3C2410_RTCCON_RTCEN,
-                                base + S3C2410_RTCCON);
-                }
+                tmp = readw(info->base + S3C2410_RTCCON);
+                writew(tmp | S3C2410_RTCCON_RTCEN,
+                        info->base + S3C2410_RTCCON);
+        }
 
-                if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CNTSEL)) {
-                        dev_info(&pdev->dev, "removing RTCCON_CNTSEL\n");
+        if (con & S3C2410_RTCCON_CNTSEL) {
+                dev_info(info->dev, "removing RTCCON_CNTSEL\n");
 
-                        tmp = readw(base + S3C2410_RTCCON);
-                        writew(tmp & ~S3C2410_RTCCON_CNTSEL,
-                                base + S3C2410_RTCCON);
-                }
+                tmp = readw(info->base + S3C2410_RTCCON);
+                writew(tmp & ~S3C2410_RTCCON_CNTSEL,
+                        info->base + S3C2410_RTCCON);
+        }
 
-                if ((readw(base + S3C2410_RTCCON) & S3C2410_RTCCON_CLKRST)) {
-                        dev_info(&pdev->dev, "removing RTCCON_CLKRST\n");
+        if (con & S3C2410_RTCCON_CLKRST) {
+                dev_info(info->dev, "removing RTCCON_CLKRST\n");
 
-                        tmp = readw(base + S3C2410_RTCCON);
-                        writew(tmp & ~S3C2410_RTCCON_CLKRST,
-                                base + S3C2410_RTCCON);
-                }
+                tmp = readw(info->base + S3C2410_RTCCON);
+                writew(tmp & ~S3C2410_RTCCON_CLKRST,
+                        info->base + S3C2410_RTCCON);
         }
-        clk_disable(rtc_clk);
+
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 }
 
-static int s3c_rtc_remove(struct platform_device *dev)
+static void s3c24xx_rtc_disable(struct s3c_rtc *info)
 {
-        s3c_rtc_setaie(&dev->dev, 0);
+        unsigned int con;
+
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+
+        con = readw(info->base + S3C2410_RTCCON);
+        con &= ~S3C2410_RTCCON_RTCEN;
+        writew(con, info->base + S3C2410_RTCCON);
 
-        clk_unprepare(rtc_clk);
-        rtc_clk = NULL;
+        con = readb(info->base + S3C2410_TICNT);
+        con &= ~S3C2410_TICNT_ENABLE;
+        writeb(con, info->base + S3C2410_TICNT);
+
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
+}
+
+static void s3c6410_rtc_disable(struct s3c_rtc *info)
+{
+        unsigned int con;
+
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+
+        con = readw(info->base + S3C2410_RTCCON);
+        con &= ~S3C64XX_RTCCON_TICEN;
+        con &= ~S3C2410_RTCCON_RTCEN;
+        writew(con, info->base + S3C2410_RTCCON);
+
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
+}
+
+static int s3c_rtc_remove(struct platform_device *pdev)
+{
+        struct s3c_rtc *info = platform_get_drvdata(pdev);
+
+        s3c_rtc_setaie(info->dev, 0);
+
+        clk_unprepare(info->rtc_clk);
+        info->rtc_clk = NULL;
 
         return 0;
 }
 
 static const struct of_device_id s3c_rtc_dt_match[];
 
-static inline int s3c_rtc_get_driver_data(struct platform_device *pdev)
+static struct s3c_rtc_data *s3c_rtc_get_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;
+        const struct of_device_id *match;
+
+        match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
+        return (struct s3c_rtc_data *)match->data;
 }
 
 static int s3c_rtc_probe(struct platform_device *pdev)
 {
-        struct rtc_device *rtc;
+        struct s3c_rtc *info = NULL;
         struct rtc_time rtc_tm;
         struct resource *res;
         int ret;
-        int tmp;
 
-        dev_dbg(&pdev->dev, "%s: probe=%p\n", __func__, pdev);
+        info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
 
         /* find the IRQs */
-
-        s3c_rtc_tickno = platform_get_irq(pdev, 1);
-        if (s3c_rtc_tickno < 0) {
+        info->irq_tick = platform_get_irq(pdev, 1);
+        if (info->irq_tick < 0) {
                 dev_err(&pdev->dev, "no irq for rtc tick\n");
-                return s3c_rtc_tickno;
+                return info->irq_tick;
+        }
+
+        info->dev = &pdev->dev;
+        info->data = s3c_rtc_get_data(pdev);
+        if (!info->data) {
+                dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
+                return -EINVAL;
         }
+        spin_lock_init(&info->pie_lock);
+        spin_lock_init(&info->alarm_clk_lock);
+
+        platform_set_drvdata(pdev, info);
 
-        s3c_rtc_alarmno = platform_get_irq(pdev, 0);
-        if (s3c_rtc_alarmno < 0) {
+        info->irq_alarm = platform_get_irq(pdev, 0);
+        if (info->irq_alarm < 0) {
                 dev_err(&pdev->dev, "no irq for alarm\n");
-                return s3c_rtc_alarmno;
+                return info->irq_alarm;
         }
 
         dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n",
-                 s3c_rtc_tickno, s3c_rtc_alarmno);
+                 info->irq_tick, info->irq_alarm);
 
         /* get the memory region */
-
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res);
-        if (IS_ERR(s3c_rtc_base))
-                return PTR_ERR(s3c_rtc_base);
-
-        rtc_clk = devm_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;
-                return ret;
+        info->base = devm_ioremap_resource(&pdev->dev, res);
+        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)) {
+                dev_err(&pdev->dev, "failed to find rtc clock\n");
+                return PTR_ERR(info->rtc_clk);
+        }
+        clk_prepare_enable(info->rtc_clk);
+
+        if (info->data->needs_src_clk) {
+                info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
+                if (IS_ERR(info->rtc_src_clk)) {
+                        dev_err(&pdev->dev,
+                                "failed to find rtc source clock\n");
+                        return PTR_ERR(info->rtc_src_clk);
+                }
+                clk_prepare_enable(info->rtc_src_clk);
         }
-
-        clk_prepare_enable(rtc_clk);
 
         /* check to see if everything is setup correctly */
-
-        s3c_rtc_enable(pdev, 1);
+        if (info->data->enable)
+                info->data->enable(info);
 
         dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
-                 readw(s3c_rtc_base + S3C2410_RTCCON));
+                 readw(info->base + S3C2410_RTCCON));
 
         device_init_wakeup(&pdev->dev, 1);
 
         /* register RTC and exit */
-
-        rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
+        info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
                                   THIS_MODULE);
-
-        if (IS_ERR(rtc)) {
+        if (IS_ERR(info->rtc)) {
                 dev_err(&pdev->dev, "cannot attach rtc\n");
-                ret = PTR_ERR(rtc);
+                ret = PTR_ERR(info->rtc);
                 goto err_nortc;
         }
 
-        s3c_rtc_cpu_type = s3c_rtc_get_driver_data(pdev);
+        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;
+        }
 
-        /* Check RTC Time */
+        ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq,
+                          0,  "s3c2410-rtc tick", info);
+        if (ret) {
+                dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret);
+                goto err_nortc;
+        }
 
-        s3c_rtc_gettime(NULL, &rtc_tm);
+        /* Check RTC Time */
+        s3c_rtc_gettime(&pdev->dev, &rtc_tm);
 
         if (rtc_valid_tm(&rtc_tm)) {
                 rtc_tm.tm_year  = 100;
@@ -523,163 +588,312 @@ static int s3c_rtc_probe(struct platform_device *pdev)
                 rtc_tm.tm_min   = 0;
                 rtc_tm.tm_sec   = 0;
 
-                s3c_rtc_settime(NULL, &rtc_tm);
+                s3c_rtc_settime(&pdev->dev, &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 (info->data->select_tick_clk)
+                info->data->select_tick_clk(info);
 
-        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);
-        }
+        s3c_rtc_setfreq(info, 1);
 
-        platform_set_drvdata(pdev, rtc);
-
-        s3c_rtc_setfreq(&pdev->dev, 1);
-
-        ret = devm_request_irq(&pdev->dev, 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_nortc;
-        }
-
-        ret = devm_request_irq(&pdev->dev, 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);
-                goto err_nortc;
-        }
-
-        clk_disable(rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 
         return 0;
 
  err_nortc:
-        s3c_rtc_enable(pdev, 0);
-        clk_disable_unprepare(rtc_clk);
+        if (info->data->disable)
+                info->data->disable(info);
+        clk_disable_unprepare(info->rtc_clk);
 
         return ret;
 }
 
 #ifdef CONFIG_PM_SLEEP
-/* RTC Power management control */
-
-static int ticnt_save, ticnt_en_save;
-static bool wake_en;
 
 static int s3c_rtc_suspend(struct device *dev)
 {
-        struct platform_device *pdev = to_platform_device(dev);
+        struct s3c_rtc *info = dev_get_drvdata(dev);
+
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
 
-        clk_enable(rtc_clk);
         /* save TICNT for anyone using periodic interrupts */
-        if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
-                ticnt_en_save = readw(s3c_rtc_base + S3C2410_RTCCON);
-                ticnt_en_save &= S3C64XX_RTCCON_TICEN;
-                ticnt_save = readl(s3c_rtc_base + S3C2410_TICNT);
-        } else {
-                ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
-        }
-        s3c_rtc_enable(pdev, 0);
+        if (info->data->save_tick_cnt)
+                info->data->save_tick_cnt(info);
 
-        if (device_may_wakeup(dev) && !wake_en) {
-                if (enable_irq_wake(s3c_rtc_alarmno) == 0)
-                        wake_en = true;
+        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");
         }
-        clk_disable(rtc_clk);
+
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 
         return 0;
 }
 
 static int s3c_rtc_resume(struct device *dev)
 {
-        struct platform_device *pdev = to_platform_device(dev);
-        unsigned int tmp;
+        struct s3c_rtc *info = dev_get_drvdata(dev);
 
-        clk_enable(rtc_clk);
-        s3c_rtc_enable(pdev, 1);
-        if (s3c_rtc_cpu_type == TYPE_S3C64XX) {
-                writel(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
-                if (ticnt_en_save) {
-                        tmp = readw(s3c_rtc_base + S3C2410_RTCCON);
-                        writew(tmp | ticnt_en_save,
-                                        s3c_rtc_base + S3C2410_RTCCON);
-                }
-        } else {
-                writeb(ticnt_save, s3c_rtc_base + S3C2410_TICNT);
-        }
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+
+        if (info->data->enable)
+                info->data->enable(info);
+
+        if (info->data->restore_tick_cnt)
+                info->data->restore_tick_cnt(info);
 
-        if (device_may_wakeup(dev) && wake_en) {
-                disable_irq_wake(s3c_rtc_alarmno);
-                wake_en = false;
+        if (device_may_wakeup(dev) && info->wake_en) {
+                disable_irq_wake(info->irq_alarm);
+                info->wake_en = false;
         }
-        clk_disable(rtc_clk);
+
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
 
         return 0;
 }
 #endif
-
 static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
 
-#ifdef CONFIG_OF
-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 },
+static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
+{
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+        rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
+
+        s3c_rtc_alarm_clk_enable(info, false);
+}
+
+static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
+{
+        clk_enable(info->rtc_clk);
+        if (info->data->needs_src_clk)
+                clk_enable(info->rtc_src_clk);
+        rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
+        writeb(mask, info->base + S3C2410_INTP);
+        if (info->data->needs_src_clk)
+                clk_disable(info->rtc_src_clk);
+        clk_disable(info->rtc_clk);
+
+        s3c_rtc_alarm_clk_enable(info, false);
+}
+
+static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+        unsigned int tmp = 0;
+        int val;
+
+        tmp = readb(info->base + S3C2410_TICNT);
+        tmp &= S3C2410_TICNT_ENABLE;
+
+        val = (info->rtc->max_user_freq / freq) - 1;
+        tmp |= val;
+
+        writel(tmp, info->base + S3C2410_TICNT);
+}
+
+static void s3c2416_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+        unsigned int tmp = 0;
+        int val;
+
+        tmp = readb(info->base + S3C2410_TICNT);
+        tmp &= S3C2410_TICNT_ENABLE;
+
+        val = (info->rtc->max_user_freq / freq) - 1;
+
+        tmp |= S3C2443_TICNT_PART(val);
+        writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
+
+        writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2);
+
+        writel(tmp, info->base + S3C2410_TICNT);
+}
+
+static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+        unsigned int tmp = 0;
+        int val;
+
+        tmp = readb(info->base + S3C2410_TICNT);
+        tmp &= S3C2410_TICNT_ENABLE;
+
+        val = (info->rtc->max_user_freq / freq) - 1;
+
+        tmp |= S3C2443_TICNT_PART(val);
+        writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
+
+        writel(tmp, info->base + S3C2410_TICNT);
+}
+
+static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq)
+{
+        int val;
+
+        val = (info->rtc->max_user_freq / freq) - 1;
+        writel(val, info->base + S3C2410_TICNT);
+}
+
+static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
+{
+        unsigned int ticnt;
+
+        ticnt = readb(info->base + S3C2410_TICNT);
+        ticnt &= S3C2410_TICNT_ENABLE;
+
+        seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt  ? "yes" : "no");
+}
+
+static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info)
+{
+        unsigned int con;
+
+        con = readw(info->base + S3C2410_RTCCON);
+        con |= S3C2443_RTCCON_TICSEL;
+        writew(con, info->base + S3C2410_RTCCON);
+}
+
+static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
+{
+        unsigned int ticnt;
+
+        ticnt = readw(info->base + S3C2410_RTCCON);
+        ticnt &= S3C64XX_RTCCON_TICEN;
+
+        seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt  ? "yes" : "no");
+}
+
+static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info)
+{
+        info->ticnt_save = readb(info->base + S3C2410_TICNT);
+}
+
+static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info)
+{
+        writeb(info->ticnt_save, info->base + S3C2410_TICNT);
+}
+
+static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info)
+{
+        info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
+        info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
+        info->ticnt_save = readl(info->base + S3C2410_TICNT);
+}
+
+static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info)
+{
+        unsigned int con;
+
+        writel(info->ticnt_save, info->base + S3C2410_TICNT);
+        if (info->ticnt_en_save) {
+                con = readw(info->base + S3C2410_RTCCON);
+                writew(con | info->ticnt_en_save,
+                                info->base + S3C2410_RTCCON);
+        }
+}
+
+static struct s3c_rtc_data const s3c2410_rtc_data = {
+        .max_user_freq          = 128,
+        .irq_handler            = s3c24xx_rtc_irq,
+        .set_freq               = s3c2410_rtc_setfreq,
+        .enable_tick            = s3c24xx_rtc_enable_tick,
+        .save_tick_cnt          = s3c24xx_rtc_save_tick_cnt,
+        .restore_tick_cnt       = s3c24xx_rtc_restore_tick_cnt,
+        .enable                 = s3c24xx_rtc_enable,
+        .disable                = s3c24xx_rtc_disable,
+};
+
+static struct s3c_rtc_data const s3c2416_rtc_data = {
+        .max_user_freq          = 32768,
+        .irq_handler            = s3c24xx_rtc_irq,
+        .set_freq               = s3c2416_rtc_setfreq,
+        .enable_tick            = s3c24xx_rtc_enable_tick,
+        .select_tick_clk        = s3c2416_rtc_select_tick_clk,
+        .save_tick_cnt          = s3c24xx_rtc_save_tick_cnt,
+        .restore_tick_cnt       = s3c24xx_rtc_restore_tick_cnt,
+        .enable                 = s3c24xx_rtc_enable,
+        .disable                = s3c24xx_rtc_disable,
+};
+
+static struct s3c_rtc_data const s3c2443_rtc_data = {
+        .max_user_freq          = 32768,
+        .irq_handler            = s3c24xx_rtc_irq,
+        .set_freq               = s3c2443_rtc_setfreq,
+        .enable_tick            = s3c24xx_rtc_enable_tick,
+        .select_tick_clk        = s3c2416_rtc_select_tick_clk,
+        .save_tick_cnt          = s3c24xx_rtc_save_tick_cnt,
+        .restore_tick_cnt       = s3c24xx_rtc_restore_tick_cnt,
+        .enable                 = s3c24xx_rtc_enable,
+        .disable                = s3c24xx_rtc_disable,
+};
+
+static struct s3c_rtc_data const s3c6410_rtc_data = {
+        .max_user_freq          = 32768,
+        .irq_handler            = s3c6410_rtc_irq,
+        .set_freq               = s3c6410_rtc_setfreq,
+        .enable_tick            = s3c6410_rtc_enable_tick,
+        .save_tick_cnt          = s3c6410_rtc_save_tick_cnt,
+        .restore_tick_cnt       = s3c6410_rtc_restore_tick_cnt,
+        .enable                 = s3c24xx_rtc_enable,
+        .disable                = s3c6410_rtc_disable,
+};
+
+static struct s3c_rtc_data const exynos3250_rtc_data = {
+        .max_user_freq          = 32768,
+        .needs_src_clk          = true,
+        .irq_handler            = s3c6410_rtc_irq,
+        .set_freq               = s3c6410_rtc_setfreq,
+        .enable_tick            = s3c6410_rtc_enable_tick,
+        .save_tick_cnt          = s3c6410_rtc_save_tick_cnt,
+        .restore_tick_cnt       = s3c6410_rtc_restore_tick_cnt,
+        .enable                 = s3c24xx_rtc_enable,
+        .disable                = s3c6410_rtc_disable,
 };
 
 static const struct of_device_id s3c_rtc_dt_match[] = {
         {
                 .compatible = "samsung,s3c2410-rtc",
-                .data = &s3c_rtc_drv_data_array[TYPE_S3C2410],
+                .data = (void *)&s3c2410_rtc_data,
         }, {
                 .compatible = "samsung,s3c2416-rtc",
-                .data = &s3c_rtc_drv_data_array[TYPE_S3C2416],
+                .data = (void *)&s3c2416_rtc_data,
         }, {
                 .compatible = "samsung,s3c2443-rtc",
-                .data = &s3c_rtc_drv_data_array[TYPE_S3C2443],
+                .data = (void *)&s3c2443_rtc_data,
         }, {
                 .compatible = "samsung,s3c6410-rtc",
-                .data = &s3c_rtc_drv_data_array[TYPE_S3C64XX],
-        },
-        {},
-};
-MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
-#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,
+                .data = (void *)&s3c6410_rtc_data,
         }, {
-                .name           = "s3c64xx-rtc",
-                .driver_data    = TYPE_S3C64XX,
+                .compatible = "samsung,exynos3250-rtc",
+                .data = (void *)&exynos3250_rtc_data,
         },
-        { }
+        { /* sentinel */ },
 };
-
-MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
+MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
 
 static struct platform_driver s3c_rtc_driver = {
         .probe          = s3c_rtc_probe,
         .remove         = s3c_rtc_remove,
-        .id_table       = s3c_rtc_driver_ids,
         .driver         = {
                 .name   = "s3c-rtc",
                 .owner  = THIS_MODULE,
@@ -687,7 +901,6 @@ static struct platform_driver s3c_rtc_driver = {
                 .of_match_table = of_match_ptr(s3c_rtc_dt_match),
         },
 };
-
 module_platform_driver(s3c_rtc_driver);
 
 MODULE_DESCRIPTION("Samsung S3C RTC Driver");