aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/rtc/rtc-s5m.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/rtc/rtc-s5m.c')
-rw-r--r--drivers/rtc/rtc-s5m.c706
1 files changed, 706 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
new file mode 100644
index 0000000..22c4ff7
--- /dev/null
+++ b/drivers/rtc/rtc-s5m.c
@@ -0,0 +1,706 @@
+/*
+ * rtc-s5m.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd
+ * http://www.samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/s5m87xx/s5m-core.h>
+#include <linux/mfd/s5m87xx/s5m-rtc.h>
+
+struct s5m_rtc_info {
+ struct device *dev;
+ struct s5m87xx_dev *s5m87xx;
+ struct i2c_client *rtc;
+ struct rtc_device *rtc_dev;
+ struct mutex lock;
+ int irq;
+ int device_type;
+ int rtc_24hr_mode;
+ bool wtsr_smpl;
+};
+
+static inline int s5m8767_rtc_calculate_wday(u8 shifted)
+{
+ int counter = -1;
+ while (shifted) {
+ shifted >>= 1;
+ counter++;
+ }
+ return counter;
+}
+
+static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm,
+ int rtc_24hr_mode)
+{
+ tm->tm_sec = data[RTC_SEC] & 0x7f;
+ tm->tm_min = data[RTC_MIN] & 0x7f;
+ if (rtc_24hr_mode)
+ tm->tm_hour = data[RTC_HOUR] & 0x1f;
+ else {
+ tm->tm_hour = data[RTC_HOUR] & 0x0f;
+ if (data[RTC_HOUR] & HOUR_PM_MASK)
+ tm->tm_hour += 12;
+ }
+
+ tm->tm_wday = s5m8767_rtc_calculate_wday(data[RTC_WEEKDAY] & 0x7f);
+ tm->tm_mday = data[RTC_DATE] & 0x1f;
+ tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
+ tm->tm_year = (data[RTC_YEAR1] & 0x7f) + (bcd2bin(data[RTC_YEAR2]) * 100);
+ tm->tm_year -= 1900;
+ tm->tm_yday = 0;
+ tm->tm_isdst = 0;
+}
+
+static void s5m8767_tm_to_data(struct rtc_time *tm, u8 *data)
+{
+ data[RTC_SEC] = tm->tm_sec;
+ data[RTC_MIN] = tm->tm_min;
+
+ if (tm->tm_hour >= 12)
+ data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK;
+ else
+ data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK;
+
+ data[RTC_WEEKDAY] = 1 << tm->tm_wday;
+ data[RTC_DATE] = tm->tm_mday;
+ data[RTC_MONTH] = tm->tm_mon + 1;
+ data[RTC_YEAR1] = tm->tm_year % 100;
+ data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
+}
+
+static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
+{
+ int ret;
+ u8 data;
+
+ ret = s5m_reg_read(info->rtc, S5M87XX_RTC_UDR_CON, &data);
+ if (ret < 0)
+ return ret;
+
+ data |= RTC_TIME_EN_MASK;
+ data |= RTC_UDR_MASK;
+
+ ret = s5m_reg_write(info->rtc, S5M87XX_RTC_UDR_CON, data);
+ if (ret < 0)
+ dev_err(info->dev, "%s: fail to write update reg(%d)\n",
+ __func__, ret);
+ else
+ msleep(20);
+
+ return ret;
+}
+
+static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
+{
+ int ret;
+ u8 data;
+
+ ret = s5m_reg_read(info->rtc, S5M87XX_RTC_UDR_CON, &data);
+ if (ret < 0)
+ return ret;
+
+ data &= ~RTC_TIME_EN_MASK;
+ data |= RTC_UDR_MASK;
+
+ ret = s5m_reg_write(info->rtc, S5M87XX_RTC_UDR_CON, data);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to write update reg(%d)\n",
+ __func__, ret);
+ } else {
+ msleep(20);
+ }
+
+ return ret;
+}
+
+static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm)
+{
+ tm->tm_sec = bcd2bin(data[RTC_SEC]);
+ tm->tm_min = bcd2bin(data[RTC_MIN]);
+
+ if (data[RTC_HOUR] & HOUR_12) {
+ tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f);
+ if (data[RTC_HOUR] & HOUR_PM)
+ tm->tm_hour += 12;
+ } else
+ tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f);
+
+ tm->tm_wday = data[RTC_WEEKDAY] & 0x07;
+ tm->tm_mday = bcd2bin(data[RTC_DATE]);
+ tm->tm_mon = bcd2bin(data[RTC_MONTH]);
+ tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100;
+ tm->tm_year -= 1900;
+}
+
+static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data)
+{
+ data[RTC_SEC] = bin2bcd(tm->tm_sec);
+ data[RTC_MIN] = bin2bcd(tm->tm_min);
+ data[RTC_HOUR] = bin2bcd(tm->tm_hour);
+ data[RTC_WEEKDAY] = tm->tm_wday;
+ data[RTC_DATE] = bin2bcd(tm->tm_mday);
+ data[RTC_MONTH] = bin2bcd(tm->tm_mon);
+ data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100);
+ data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100);
+}
+
+static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct s5m_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[8];
+ int ret;
+
+ mutex_lock(&info->lock);
+
+ ret = s5m_bulk_read(info->rtc, S5M87XX_RTC_SEC, 8, data);
+ if (ret < 0)
+ goto out;
+
+ switch (info->device_type) {
+ case S5M8763X:
+ s5m8763_data_to_tm(data, tm);
+ break;
+
+ case S5M8767X:
+ s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
+ break;
+
+ default:
+ ret = (-EINVAL);
+ goto out;
+ }
+
+ printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
+ 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
+ tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
+
+out:
+ mutex_unlock(&info->lock);
+ if (ret >= 0)
+ ret = rtc_valid_tm(tm);
+ return ret;
+}
+
+static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct s5m_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[8];
+ int ret;
+
+ switch (info->device_type) {
+ case S5M8763X:
+ s5m8763_tm_to_data(tm, data);
+ break;
+ case S5M8767X:
+ s5m8767_tm_to_data(tm, data);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
+ 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday,
+ tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday);
+
+ mutex_lock(&info->lock);
+
+ ret = s5m_bulk_write(info->rtc, S5M87XX_RTC_SEC, 8, data);
+ if (ret < 0)
+ goto out;
+
+ ret = s5m8767_rtc_set_time_reg(info);
+
+out:
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct s5m_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[8];
+ u8 val;
+ int ret, i;
+
+ mutex_lock(&info->lock);
+
+ ret = s5m_bulk_read(info->rtc, S5M87XX_ALARM0_SEC, 8, data);
+ if (ret < 0)
+ goto out;
+
+ switch (info->device_type) {
+ case S5M8763X:
+ s5m8763_data_to_tm(data, &alrm->time);
+ ret = s5m_reg_read(info->rtc, S5M87XX_ALARM0_CONF, &val);
+ if (ret < 0)
+ goto out;
+
+ alrm->enabled = !!val;
+
+ ret = s5m_reg_read(info->rtc, S5M87XX_RTC_STATUS, &val);
+ if (ret < 0)
+ goto out;
+
+ break;
+
+ case S5M8767X:
+ s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
+ printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
+ 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
+ alrm->time.tm_mday, alrm->time.tm_hour,
+ alrm->time.tm_min, alrm->time.tm_sec,
+ alrm->time.tm_wday);
+
+ alrm->enabled = 0;
+ for (i = 0; i < 7; i++) {
+ if (data[i] & ALARM_ENABLE_MASK) {
+ alrm->enabled = 1;
+ break;
+ }
+ }
+
+ alrm->pending = 0;
+ ret = s5m_reg_read(info->rtc, S5M87XX_RTC_STATUS, &val);
+ if (ret < 0)
+ goto out;
+ break;
+
+ default:
+ ret = (-EINVAL);
+ goto out;
+ }
+
+ if (val & ALARM0_STATUS)
+ alrm->pending = 1;
+ else
+ alrm->pending = 0;
+out:
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
+{
+ u8 data[8];
+ int ret, i;
+ struct rtc_time tm;
+
+ if (!mutex_is_locked(&info->lock))
+ dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
+
+ ret = s5m_bulk_read(info->rtc, S5M87XX_ALARM0_SEC, 8, data);
+ if (ret < 0)
+ return ret;
+
+ s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
+ printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
+ 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
+
+ switch (info->device_type) {
+ case S5M8763X:
+ ret = s5m_reg_write(info->rtc, S5M87XX_ALARM0_CONF, 0);
+ break;
+
+ case S5M8767X:
+ for (i = 0; i < 7; i++)
+ data[i] &= ~ALARM_ENABLE_MASK;
+
+ ret = s5m_bulk_write(info->rtc, S5M87XX_ALARM0_SEC, 8, data);
+ if (ret <0)
+ return ret;
+
+ ret = s5m8767_rtc_set_alarm_reg(info);
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
+{
+ int ret;
+ u8 data[8];
+ u8 alarm0_conf;
+ struct rtc_time tm;
+
+ if (!mutex_is_locked(&info->lock))
+ dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
+
+ ret = s5m_bulk_read(info->rtc, S5M87XX_ALARM0_SEC, 8, data);
+ if (ret < 0)
+ return ret;
+
+ s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
+ printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
+ 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
+
+ switch (info->device_type) {
+ case S5M8763X:
+ alarm0_conf = 0x77;
+ ret = s5m_reg_write(info->rtc, S5M87XX_ALARM0_CONF, alarm0_conf);
+ break;
+
+ case S5M8767X:
+ data[RTC_SEC] |= ALARM_ENABLE_MASK;
+ data[RTC_MIN] |= ALARM_ENABLE_MASK;
+ data[RTC_HOUR] |= ALARM_ENABLE_MASK;
+ data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK;
+ if (data[RTC_DATE] & 0x1f)
+ data[RTC_DATE] |= ALARM_ENABLE_MASK;
+ if (data[RTC_MONTH] & 0xf)
+ data[RTC_MONTH] |= ALARM_ENABLE_MASK;
+ if (data[RTC_YEAR1] & 0x7f)
+ data[RTC_YEAR1] |= ALARM_ENABLE_MASK;
+
+ ret = s5m_bulk_write(info->rtc, S5M87XX_ALARM0_SEC, 8, data);
+ if (ret < 0)
+ return ret;
+ ret = s5m8767_rtc_set_alarm_reg(info);
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct s5m_rtc_info *info = dev_get_drvdata(dev);
+ u8 data[8];
+ int ret;
+
+ switch (info->device_type) {
+ case S5M8763X:
+ s5m8763_tm_to_data(&alrm->time, data);
+ break;
+
+ case S5M8767X:
+ s5m8767_tm_to_data(&alrm->time, data);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
+ 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon,
+ alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min,
+ alrm->time.tm_sec, alrm->time.tm_wday);
+
+ mutex_lock(&info->lock);
+
+ ret = s5m_rtc_stop_alarm(info);
+ if (ret < 0)
+ goto out;
+
+ ret = s5m_bulk_write(info->rtc, S5M87XX_ALARM0_SEC, 8, data);
+ if (ret < 0)
+ goto out;
+
+ ret = s5m8767_rtc_set_alarm_reg(info);
+ if (ret < 0)
+ goto out;
+
+ if (alrm->enabled)
+ ret = s5m_rtc_start_alarm(info);
+out:
+ mutex_unlock(&info->lock);
+ return ret;
+}
+
+static int s5m_rtc_alarm_irq_enable(struct device *dev,
+ unsigned int enabled)
+{
+ struct s5m_rtc_info *info = dev_get_drvdata(dev);
+ int ret;
+
+ mutex_lock(&info->lock);
+ if (enabled) {
+ ret = s5m_rtc_start_alarm(info);
+ } else {
+ ret = s5m_rtc_stop_alarm(info);
+ }
+ mutex_unlock(&info->lock);
+
+ return ret;
+}
+
+static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data)
+{
+ struct s5m_rtc_info *info = data;
+
+ rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
+
+ return IRQ_HANDLED;
+}
+
+static const struct rtc_class_ops s5m_rtc_ops = {
+ .read_time = s5m_rtc_read_time,
+ .set_time = s5m_rtc_set_time,
+ .read_alarm = s5m_rtc_read_alarm,
+ .set_alarm = s5m_rtc_set_alarm,
+ .alarm_irq_enable = s5m_rtc_alarm_irq_enable,
+};
+
+static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable)
+{
+ int ret;
+ u8 val, mask;
+
+ if (enable)
+ val = WTSR_ENABLE_MASK;
+ else
+ val = 0;
+
+ mask = WTSR_ENABLE_MASK;
+
+ dev_info(info->dev, "%s: %s WTSR\n", __func__,
+ enable ? "enable" : "disable");
+
+ ret = s5m_reg_update(info->rtc, S5M87XX_WTSR_SMPL_CNTL, val, mask);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
+ __func__, ret);
+ return;
+ }
+}
+
+static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable)
+{
+ int ret;
+ u8 val, mask;
+
+ if (enable)
+ val = SMPL_ENABLE_MASK;
+ else
+ val = 0;
+
+ mask = SMPL_ENABLE_MASK;
+
+ dev_info(info->dev, "%s: %s SMPL\n", __func__,
+ enable ? "enable" : "disable");
+
+ ret = s5m_reg_update(info->rtc, S5M87XX_WTSR_SMPL_CNTL, val, mask);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
+ __func__, ret);
+ return;
+ }
+
+ val = 0;
+ s5m_reg_read(info->rtc, S5M87XX_WTSR_SMPL_CNTL, &val);
+ pr_info("%s: WTSR_SMPL(0x%02x)\n", __func__, val);
+}
+
+static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
+{
+ u8 data[2], tp_read;
+ int ret;
+ struct rtc_time tm;
+
+ ret = s5m_reg_read(info->rtc, S5M87XX_RTC_UDR_CON, &tp_read);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to read control reg(%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* Set RTC control register : Binary mode, 24hour mdoe */
+ data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
+ data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
+
+ info->rtc_24hr_mode = 1;
+ ret = s5m_bulk_write(info->rtc, S5M87XX_ALARM0_CONF, 2, data);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* In first boot time, Set rtc time to 1/1/2012 00:00:00(SUN) */
+ if ((tp_read & RTC_TCON_MASK) == 0) {
+ dev_info(info->dev, "rtc init\n");
+ tm.tm_sec = 0;
+ tm.tm_min = 0;
+ tm.tm_hour = 0;
+ tm.tm_wday = 0;
+ tm.tm_mday = 1;
+ tm.tm_mon = 0;
+ tm.tm_year = 112;
+ tm.tm_yday = 0;
+ tm.tm_isdst = 0;
+ ret = s5m_rtc_set_time(info->dev, &tm);
+ }
+
+ ret = s5m_reg_update(info->rtc, S5M87XX_RTC_UDR_CON,
+ tp_read | RTC_TCON_MASK, RTC_TCON_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "%s: fail to update TCON reg(%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int __devinit s5m_rtc_probe(struct platform_device *pdev)
+{
+ struct s5m87xx_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
+ struct s5m_platform_data *pdata = dev_get_platdata(s5m87xx->dev);
+ struct s5m_rtc_info *info;
+ int ret;
+
+ info = kzalloc(sizeof(struct s5m_rtc_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ mutex_init(&info->lock);
+ info->dev = &pdev->dev;
+ info->s5m87xx = s5m87xx;
+ info->rtc = s5m87xx->rtc;
+ info->device_type = s5m87xx->device_type;
+ info->wtsr_smpl = s5m87xx->wtsr_smpl;
+
+ switch (pdata->device_type) {
+ case S5M8763X:
+ info->irq = s5m87xx->irq_base + S5M8763_IRQ_ALARM0;
+ break;
+
+ case S5M8767X:
+ info->irq = s5m87xx->irq_base + S5M8767_IRQ_RTCA1;
+ break;
+
+ default:
+ ret = -EINVAL;
+ dev_err(&pdev->dev, "Unsupported device type: %d\n", ret);
+ goto out_rtc;
+ }
+
+ platform_set_drvdata(pdev, info);
+
+ ret = s5m8767_rtc_init_reg(info);
+
+ if (info->wtsr_smpl) {
+ s5m_rtc_enable_wtsr(info, true);
+ s5m_rtc_enable_smpl(info, true);
+ }
+
+ device_init_wakeup(&pdev->dev, 1);
+
+ info->rtc_dev = rtc_device_register("s5m-rtc", &pdev->dev,
+ &s5m_rtc_ops, THIS_MODULE);
+
+ if (IS_ERR(info->rtc_dev)) {
+ ret = PTR_ERR(info->rtc_dev);
+ dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
+ goto out_rtc;
+ }
+
+ ret = request_threaded_irq(info->irq, NULL, s5m_rtc_alarm_irq, 0,
+ "rtc-alarm0", info);
+
+ if (ret < 0)
+ dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
+ info->irq, ret);
+
+ dev_info(&pdev->dev, "RTC CHIP NAME: %s\n", pdev->id_entry->name);
+
+ return 0;
+
+out_rtc:
+ platform_set_drvdata(pdev, NULL);
+ kfree(info);
+ return ret;
+}
+
+static int __devexit s5m_rtc_remove(struct platform_device *pdev)
+{
+ struct s5m_rtc_info *info = platform_get_drvdata(pdev);
+
+ if (info) {
+ free_irq(info->irq, info);
+ rtc_device_unregister(info->rtc_dev);
+ kfree(info);
+ }
+
+ return 0;
+}
+
+static void s5m_rtc_shutdown(struct platform_device *pdev)
+{
+ struct s5m_rtc_info *info = platform_get_drvdata(pdev);
+ int i;
+ u8 val = 0;
+ if (info->wtsr_smpl) {
+ for (i = 0; i < 3; i++) {
+ s5m_rtc_enable_wtsr(info, false);
+ s5m_reg_read(info->rtc, S5M87XX_WTSR_SMPL_CNTL, &val);
+ pr_info("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
+ if (val & WTSR_ENABLE_MASK)
+ pr_emerg("%s: fail to disable WTSR\n", __func__);
+ else {
+ pr_info("%s: success to disable WTSR\n", __func__);
+ break;
+ }
+ }
+ }
+ /* Disable SMPL when power off */
+ s5m_rtc_enable_smpl(info, false);
+}
+
+static const struct platform_device_id s5m_rtc_id[] = {
+ { "s5m-rtc", 0 },
+};
+
+static struct platform_driver s5m_rtc_driver = {
+ .driver = {
+ .name = "s5m-rtc",
+ .owner = THIS_MODULE,
+ },
+ .probe = s5m_rtc_probe,
+ .remove = __devexit_p(s5m_rtc_remove),
+ .shutdown = s5m_rtc_shutdown,
+ .id_table = s5m_rtc_id,
+};
+
+static int __init s5m_rtc_init(void)
+{
+ return platform_driver_register(&s5m_rtc_driver);
+}
+module_init(s5m_rtc_init);
+
+static void __exit s5m_rtc_exit(void)
+{
+ platform_driver_unregister(&s5m_rtc_driver);
+}
+module_exit(s5m_rtc_exit);
+
+/* Module information */
+MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("Samsung S5M RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s5m-rtc");