rtc: s5m-rtc: add real-time clock driver for s5m8767
authorSangbeom Kim <sbkim73@samsung.com>
Tue, 12 Nov 2013 23:11:04 +0000 (15:11 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 13 Nov 2013 03:09:31 +0000 (12:09 +0900)
Add real-time clock driver for s5m8767.

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Todd Broch <tbroch@chromium.org>
Cc: Mark Brown <broonie@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org> [mfd parts]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/rtc/Kconfig
drivers/rtc/Makefile
drivers/rtc/rtc-s5m.c [new file with mode: 0644]
include/linux/mfd/samsung/core.h
include/linux/mfd/samsung/rtc.h

index 9654aa3c05cbd87c89b7c7ee2a8d8ebf34d5326e..4f48b9a26aa09d7d7bfeefef1dc644adda3cd716 100644 (file)
@@ -497,6 +497,16 @@ config RTC_DRV_RV3029C2
          This driver can also be built as a module. If so, the module
          will be called rtc-rv3029c2.
 
+config RTC_DRV_S5M
+       tristate "Samsung S5M series"
+       depends on MFD_SEC_CORE
+       help
+         If you say yes here you will get support for the
+         RTC of Samsung S5M PMIC series.
+
+         This driver can also be built as a module. If so, the module
+         will be called rtc-s5m.
+
 endif # I2C
 
 comment "SPI RTC drivers"
index 2dff3d2009b5f5a3cad9e30b0eed0e726e9a51e1..9312e7965365abcdb732aee57441ea5947080bf7 100644 (file)
@@ -107,6 +107,7 @@ obj-$(CONFIG_RTC_DRV_RX8025)        += rtc-rx8025.o
 obj-$(CONFIG_RTC_DRV_RX8581)   += rtc-rx8581.o
 obj-$(CONFIG_RTC_DRV_S35390A)  += rtc-s35390a.o
 obj-$(CONFIG_RTC_DRV_S3C)      += rtc-s3c.o
+obj-$(CONFIG_RTC_DRV_S5M)      += rtc-s5m.o
 obj-$(CONFIG_RTC_DRV_SA1100)   += rtc-sa1100.o
 obj-$(CONFIG_RTC_DRV_SH)       += rtc-sh.o
 obj-$(CONFIG_RTC_DRV_SNVS)     += rtc-snvs.o
diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
new file mode 100644 (file)
index 0000000..b7fd02b
--- /dev/null
@@ -0,0 +1,635 @@
+/*
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd
+ *     http://www.samsung.com
+ *
+ *  Copyright (C) 2013 Google, Inc
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/bcd.h>
+#include <linux/bitops.h>
+#include <linux/regmap.h>
+#include <linux/rtc.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/samsung/core.h>
+#include <linux/mfd/samsung/irq.h>
+#include <linux/mfd/samsung/rtc.h>
+
+struct s5m_rtc_info {
+       struct device *dev;
+       struct sec_pmic_dev *s5m87xx;
+       struct regmap *rtc;
+       struct rtc_device *rtc_dev;
+       int irq;
+       int device_type;
+       int rtc_24hr_mode;
+       bool wtsr_smpl;
+};
+
+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 = ffs(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) + 100;
+       tm->tm_yday = 0;
+       tm->tm_isdst = 0;
+}
+
+static int 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 ? (tm->tm_year - 100) : 0;
+
+       if (tm->tm_year < 100) {
+               pr_err("s5m8767 RTC cannot handle the year %d.\n",
+                      1900 + tm->tm_year);
+               return -EINVAL;
+       } else {
+               return 0;
+       }
+}
+
+static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info)
+{
+       int ret;
+       unsigned int data;
+
+       ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data);
+       if (ret < 0) {
+               dev_err(info->dev, "failed to read update reg(%d)\n", ret);
+               return ret;
+       }
+
+       data |= RTC_TIME_EN_MASK;
+       data |= RTC_UDR_MASK;
+
+       ret = regmap_write(info->rtc, SEC_RTC_UDR_CON, data);
+       if (ret < 0) {
+               dev_err(info->dev, "failed to write update reg(%d)\n", ret);
+               return ret;
+       }
+
+       do {
+               ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data);
+       } while ((data & RTC_UDR_MASK) && !ret);
+
+       return ret;
+}
+
+static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
+{
+       int ret;
+       unsigned int data;
+
+       ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data);
+       if (ret < 0) {
+               dev_err(info->dev, "%s: fail to read update reg(%d)\n",
+                       __func__, ret);
+               return ret;
+       }
+
+       data &= ~RTC_TIME_EN_MASK;
+       data |= RTC_UDR_MASK;
+
+       ret = regmap_write(info->rtc, SEC_RTC_UDR_CON, data);
+       if (ret < 0) {
+               dev_err(info->dev, "%s: fail to write update reg(%d)\n",
+                       __func__, ret);
+               return ret;
+       }
+
+       do {
+               ret = regmap_read(info->rtc, SEC_RTC_UDR_CON, &data);
+       } while ((data & RTC_UDR_MASK) && !ret);
+
+       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;
+
+       ret = regmap_bulk_read(info->rtc, SEC_RTC_SEC, data, 8);
+       if (ret < 0)
+               return ret;
+
+       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:
+               return -EINVAL;
+       }
+
+       dev_dbg(dev, "%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);
+
+       return rtc_valid_tm(tm);
+}
+
+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 = 0;
+
+       switch (info->device_type) {
+       case S5M8763X:
+               s5m8763_tm_to_data(tm, data);
+               break;
+       case S5M8767X:
+               ret = s5m8767_tm_to_data(tm, data);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       if (ret < 0)
+               return ret;
+
+       dev_dbg(dev, "%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);
+
+       ret = regmap_raw_write(info->rtc, SEC_RTC_SEC, data, 8);
+       if (ret < 0)
+               return ret;
+
+       ret = s5m8767_rtc_set_time_reg(info);
+
+       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];
+       unsigned int val;
+       int ret, i;
+
+       ret = regmap_bulk_read(info->rtc, SEC_ALARM0_SEC, data, 8);
+       if (ret < 0)
+               return ret;
+
+       switch (info->device_type) {
+       case S5M8763X:
+               s5m8763_data_to_tm(data, &alrm->time);
+               ret = regmap_read(info->rtc, SEC_ALARM0_CONF, &val);
+               if (ret < 0)
+                       return ret;
+
+               alrm->enabled = !!val;
+
+               ret = regmap_read(info->rtc, SEC_RTC_STATUS, &val);
+               if (ret < 0)
+                       return ret;
+
+               break;
+
+       case S5M8767X:
+               s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
+               dev_dbg(dev, "%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 = regmap_read(info->rtc, SEC_RTC_STATUS, &val);
+               if (ret < 0)
+                       return ret;
+               break;
+
+       default:
+               return -EINVAL;
+       }
+
+       if (val & ALARM0_STATUS)
+               alrm->pending = 1;
+       else
+               alrm->pending = 0;
+
+       return 0;
+}
+
+static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
+{
+       u8 data[8];
+       int ret, i;
+       struct rtc_time tm;
+
+       ret = regmap_bulk_read(info->rtc, SEC_ALARM0_SEC, data, 8);
+       if (ret < 0)
+               return ret;
+
+       s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
+       dev_dbg(info->dev, "%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 = regmap_write(info->rtc, SEC_ALARM0_CONF, 0);
+               break;
+
+       case S5M8767X:
+               for (i = 0; i < 7; i++)
+                       data[i] &= ~ALARM_ENABLE_MASK;
+
+               ret = regmap_raw_write(info->rtc, SEC_ALARM0_SEC, data, 8);
+               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;
+
+       ret = regmap_bulk_read(info->rtc, SEC_ALARM0_SEC, data, 8);
+       if (ret < 0)
+               return ret;
+
+       s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode);
+       dev_dbg(info->dev, "%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 = regmap_write(info->rtc, SEC_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 = regmap_raw_write(info->rtc, SEC_ALARM0_SEC, data, 8);
+               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;
+       }
+
+       dev_dbg(dev, "%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);
+
+       ret = s5m_rtc_stop_alarm(info);
+       if (ret < 0)
+               return ret;
+
+       ret = regmap_raw_write(info->rtc, SEC_ALARM0_SEC, data, 8);
+       if (ret < 0)
+               return ret;
+
+       ret = s5m8767_rtc_set_alarm_reg(info);
+       if (ret < 0)
+               return ret;
+
+       if (alrm->enabled)
+               ret = s5m_rtc_start_alarm(info);
+
+       return ret;
+}
+
+static int s5m_rtc_alarm_irq_enable(struct device *dev,
+                                   unsigned int enabled)
+{
+       struct s5m_rtc_info *info = dev_get_drvdata(dev);
+
+       if (enabled)
+               return s5m_rtc_start_alarm(info);
+       else
+               return s5m_rtc_stop_alarm(info);
+}
+
+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;
+       ret = regmap_update_bits(info->rtc, SEC_WTSR_SMPL_CNTL,
+                                WTSR_ENABLE_MASK,
+                                enable ? WTSR_ENABLE_MASK : 0);
+       if (ret < 0)
+               dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
+                       __func__, ret);
+}
+
+static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable)
+{
+       int ret;
+       ret = regmap_update_bits(info->rtc, SEC_WTSR_SMPL_CNTL,
+                                SMPL_ENABLE_MASK,
+                                enable ? SMPL_ENABLE_MASK : 0);
+       if (ret < 0)
+               dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n",
+                       __func__, ret);
+}
+
+static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
+{
+       u8 data[2];
+       unsigned int tp_read;
+       int ret;
+       struct rtc_time tm;
+
+       ret = regmap_read(info->rtc, SEC_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 mode */
+       data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
+       data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
+
+       info->rtc_24hr_mode = 1;
+       ret = regmap_raw_write(info->rtc, SEC_ALARM0_CONF, data, 2);
+       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_dbg(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 = regmap_update_bits(info->rtc, SEC_RTC_UDR_CON,
+                                RTC_TCON_MASK, tp_read | RTC_TCON_MASK);
+       if (ret < 0)
+               dev_err(info->dev, "%s: fail to update TCON reg(%d)\n",
+                       __func__, ret);
+
+       return ret;
+}
+
+static int s5m_rtc_probe(struct platform_device *pdev)
+{
+       struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent);
+       struct sec_platform_data *pdata = s5m87xx->pdata;
+       struct s5m_rtc_info *info;
+       int ret;
+
+       if (!pdata) {
+               dev_err(pdev->dev.parent, "Platform data not supplied\n");
+               return -ENODEV;
+       }
+
+       info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+       if (!info)
+               return -ENOMEM;
+
+       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);
+               return ret;
+       }
+
+       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 = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
+                                                &s5m_rtc_ops, THIS_MODULE);
+
+       if (IS_ERR(info->rtc_dev))
+               return PTR_ERR(info->rtc_dev);
+
+       ret = devm_request_threaded_irq(&pdev->dev, 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);
+
+       return ret;
+}
+
+static void s5m_rtc_shutdown(struct platform_device *pdev)
+{
+       struct s5m_rtc_info *info = platform_get_drvdata(pdev);
+       int i;
+       unsigned int val = 0;
+       if (info->wtsr_smpl) {
+               for (i = 0; i < 3; i++) {
+                       s5m_rtc_enable_wtsr(info, false);
+                       regmap_read(info->rtc, SEC_WTSR_SMPL_CNTL, &val);
+                       pr_debug("%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,
+       .shutdown       = s5m_rtc_shutdown,
+       .id_table       = s5m_rtc_id,
+};
+
+module_platform_driver(s5m_rtc_driver);
+
+/* Module information */
+MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("Samsung S5M RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s5m-rtc");
index 378ae8a04c6a081265b22722c84d2631bcd82b58..2d0c9071bcfb795a4f34cdc44b1e88abae394c5e 100644 (file)
@@ -51,6 +51,7 @@ struct sec_pmic_dev {
        int ono;
        int type;
        bool wakeup;
+       bool wtsr_smpl;
 };
 
 int sec_irq_init(struct sec_pmic_dev *sec_pmic);
index 71597e20cddb54d1aaa45474f82120c4d1f1e868..94b7cd6d889185f9df10b611099bf06038365b83 100644 (file)
@@ -62,6 +62,11 @@ enum sec_rtc_reg {
 /* RTC Update Register1 */
 #define RTC_UDR_SHIFT          0
 #define RTC_UDR_MASK           (1 << RTC_UDR_SHIFT)
+#define RTC_TCON_SHIFT         1
+#define RTC_TCON_MASK          (1 << RTC_TCON_SHIFT)
+#define RTC_TIME_EN_SHIFT      3
+#define RTC_TIME_EN_MASK       (1 << RTC_TIME_EN_SHIFT)
+
 /* RTC Hour register */
 #define HOUR_PM_SHIFT          6
 #define HOUR_PM_MASK           (1 << HOUR_PM_SHIFT)
@@ -69,6 +74,12 @@ enum sec_rtc_reg {
 #define ALARM_ENABLE_SHIFT     7
 #define ALARM_ENABLE_MASK      (1 << ALARM_ENABLE_SHIFT)
 
+#define SMPL_ENABLE_SHIFT      7
+#define SMPL_ENABLE_MASK       (1 << SMPL_ENABLE_SHIFT)
+
+#define WTSR_ENABLE_SHIFT      6
+#define WTSR_ENABLE_MASK       (1 << WTSR_ENABLE_SHIFT)
+
 enum {
        RTC_SEC = 0,
        RTC_MIN,