15bccae6eSSangbeom Kim /* 25bccae6eSSangbeom Kim * Copyright (c) 2013 Samsung Electronics Co., Ltd 35bccae6eSSangbeom Kim * http://www.samsung.com 45bccae6eSSangbeom Kim * 55bccae6eSSangbeom Kim * Copyright (C) 2013 Google, Inc 65bccae6eSSangbeom Kim * 75bccae6eSSangbeom Kim * This program is free software; you can redistribute it and/or modify 85bccae6eSSangbeom Kim * it under the terms of the GNU General Public License as published by 95bccae6eSSangbeom Kim * the Free Software Foundation; either version 2 of the License, or 105bccae6eSSangbeom Kim * (at your option) any later version. 115bccae6eSSangbeom Kim * 125bccae6eSSangbeom Kim * This program is distributed in the hope that it will be useful, 135bccae6eSSangbeom Kim * but WITHOUT ANY WARRANTY; without even the implied warranty of 145bccae6eSSangbeom Kim * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 155bccae6eSSangbeom Kim * GNU General Public License for more details. 165bccae6eSSangbeom Kim */ 175bccae6eSSangbeom Kim 185bccae6eSSangbeom Kim #include <linux/module.h> 195bccae6eSSangbeom Kim #include <linux/i2c.h> 205bccae6eSSangbeom Kim #include <linux/slab.h> 215bccae6eSSangbeom Kim #include <linux/bcd.h> 225bccae6eSSangbeom Kim #include <linux/bitops.h> 235bccae6eSSangbeom Kim #include <linux/regmap.h> 245bccae6eSSangbeom Kim #include <linux/rtc.h> 255bccae6eSSangbeom Kim #include <linux/delay.h> 265bccae6eSSangbeom Kim #include <linux/platform_device.h> 275bccae6eSSangbeom Kim #include <linux/mfd/samsung/core.h> 285bccae6eSSangbeom Kim #include <linux/mfd/samsung/irq.h> 295bccae6eSSangbeom Kim #include <linux/mfd/samsung/rtc.h> 305bccae6eSSangbeom Kim 315bccae6eSSangbeom Kim struct s5m_rtc_info { 325bccae6eSSangbeom Kim struct device *dev; 335bccae6eSSangbeom Kim struct sec_pmic_dev *s5m87xx; 345ccb7d71SGeert Uytterhoeven struct regmap *regmap; 355bccae6eSSangbeom Kim struct rtc_device *rtc_dev; 365bccae6eSSangbeom Kim int irq; 375bccae6eSSangbeom Kim int device_type; 385bccae6eSSangbeom Kim int rtc_24hr_mode; 395bccae6eSSangbeom Kim bool wtsr_smpl; 405bccae6eSSangbeom Kim }; 415bccae6eSSangbeom Kim 425bccae6eSSangbeom Kim static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm, 435bccae6eSSangbeom Kim int rtc_24hr_mode) 445bccae6eSSangbeom Kim { 455bccae6eSSangbeom Kim tm->tm_sec = data[RTC_SEC] & 0x7f; 465bccae6eSSangbeom Kim tm->tm_min = data[RTC_MIN] & 0x7f; 475bccae6eSSangbeom Kim if (rtc_24hr_mode) { 485bccae6eSSangbeom Kim tm->tm_hour = data[RTC_HOUR] & 0x1f; 495bccae6eSSangbeom Kim } else { 505bccae6eSSangbeom Kim tm->tm_hour = data[RTC_HOUR] & 0x0f; 515bccae6eSSangbeom Kim if (data[RTC_HOUR] & HOUR_PM_MASK) 525bccae6eSSangbeom Kim tm->tm_hour += 12; 535bccae6eSSangbeom Kim } 545bccae6eSSangbeom Kim 555bccae6eSSangbeom Kim tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f); 565bccae6eSSangbeom Kim tm->tm_mday = data[RTC_DATE] & 0x1f; 575bccae6eSSangbeom Kim tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; 585bccae6eSSangbeom Kim tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100; 595bccae6eSSangbeom Kim tm->tm_yday = 0; 605bccae6eSSangbeom Kim tm->tm_isdst = 0; 615bccae6eSSangbeom Kim } 625bccae6eSSangbeom Kim 635bccae6eSSangbeom Kim static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data) 645bccae6eSSangbeom Kim { 655bccae6eSSangbeom Kim data[RTC_SEC] = tm->tm_sec; 665bccae6eSSangbeom Kim data[RTC_MIN] = tm->tm_min; 675bccae6eSSangbeom Kim 685bccae6eSSangbeom Kim if (tm->tm_hour >= 12) 695bccae6eSSangbeom Kim data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK; 705bccae6eSSangbeom Kim else 715bccae6eSSangbeom Kim data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK; 725bccae6eSSangbeom Kim 735bccae6eSSangbeom Kim data[RTC_WEEKDAY] = 1 << tm->tm_wday; 745bccae6eSSangbeom Kim data[RTC_DATE] = tm->tm_mday; 755bccae6eSSangbeom Kim data[RTC_MONTH] = tm->tm_mon + 1; 765bccae6eSSangbeom Kim data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; 775bccae6eSSangbeom Kim 785bccae6eSSangbeom Kim if (tm->tm_year < 100) { 795bccae6eSSangbeom Kim pr_err("s5m8767 RTC cannot handle the year %d.\n", 805bccae6eSSangbeom Kim 1900 + tm->tm_year); 815bccae6eSSangbeom Kim return -EINVAL; 825bccae6eSSangbeom Kim } else { 835bccae6eSSangbeom Kim return 0; 845bccae6eSSangbeom Kim } 855bccae6eSSangbeom Kim } 865bccae6eSSangbeom Kim 875bccae6eSSangbeom Kim static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info) 885bccae6eSSangbeom Kim { 895bccae6eSSangbeom Kim int ret; 905bccae6eSSangbeom Kim unsigned int data; 915bccae6eSSangbeom Kim 925ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data); 935bccae6eSSangbeom Kim if (ret < 0) { 945bccae6eSSangbeom Kim dev_err(info->dev, "failed to read update reg(%d)\n", ret); 955bccae6eSSangbeom Kim return ret; 965bccae6eSSangbeom Kim } 975bccae6eSSangbeom Kim 985bccae6eSSangbeom Kim data |= RTC_TIME_EN_MASK; 995bccae6eSSangbeom Kim data |= RTC_UDR_MASK; 1005bccae6eSSangbeom Kim 1015ccb7d71SGeert Uytterhoeven ret = regmap_write(info->regmap, SEC_RTC_UDR_CON, data); 1025bccae6eSSangbeom Kim if (ret < 0) { 1035bccae6eSSangbeom Kim dev_err(info->dev, "failed to write update reg(%d)\n", ret); 1045bccae6eSSangbeom Kim return ret; 1055bccae6eSSangbeom Kim } 1065bccae6eSSangbeom Kim 1075bccae6eSSangbeom Kim do { 1085ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data); 1095bccae6eSSangbeom Kim } while ((data & RTC_UDR_MASK) && !ret); 1105bccae6eSSangbeom Kim 1115bccae6eSSangbeom Kim return ret; 1125bccae6eSSangbeom Kim } 1135bccae6eSSangbeom Kim 1145bccae6eSSangbeom Kim static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info) 1155bccae6eSSangbeom Kim { 1165bccae6eSSangbeom Kim int ret; 1175bccae6eSSangbeom Kim unsigned int data; 1185bccae6eSSangbeom Kim 1195ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data); 1205bccae6eSSangbeom Kim if (ret < 0) { 1215bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to read update reg(%d)\n", 1225bccae6eSSangbeom Kim __func__, ret); 1235bccae6eSSangbeom Kim return ret; 1245bccae6eSSangbeom Kim } 1255bccae6eSSangbeom Kim 1265bccae6eSSangbeom Kim data &= ~RTC_TIME_EN_MASK; 1275bccae6eSSangbeom Kim data |= RTC_UDR_MASK; 1285bccae6eSSangbeom Kim 1295ccb7d71SGeert Uytterhoeven ret = regmap_write(info->regmap, SEC_RTC_UDR_CON, data); 1305bccae6eSSangbeom Kim if (ret < 0) { 1315bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to write update reg(%d)\n", 1325bccae6eSSangbeom Kim __func__, ret); 1335bccae6eSSangbeom Kim return ret; 1345bccae6eSSangbeom Kim } 1355bccae6eSSangbeom Kim 1365bccae6eSSangbeom Kim do { 1375ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &data); 1385bccae6eSSangbeom Kim } while ((data & RTC_UDR_MASK) && !ret); 1395bccae6eSSangbeom Kim 1405bccae6eSSangbeom Kim return ret; 1415bccae6eSSangbeom Kim } 1425bccae6eSSangbeom Kim 1435bccae6eSSangbeom Kim static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm) 1445bccae6eSSangbeom Kim { 1455bccae6eSSangbeom Kim tm->tm_sec = bcd2bin(data[RTC_SEC]); 1465bccae6eSSangbeom Kim tm->tm_min = bcd2bin(data[RTC_MIN]); 1475bccae6eSSangbeom Kim 1485bccae6eSSangbeom Kim if (data[RTC_HOUR] & HOUR_12) { 1495bccae6eSSangbeom Kim tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f); 1505bccae6eSSangbeom Kim if (data[RTC_HOUR] & HOUR_PM) 1515bccae6eSSangbeom Kim tm->tm_hour += 12; 1525bccae6eSSangbeom Kim } else { 1535bccae6eSSangbeom Kim tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f); 1545bccae6eSSangbeom Kim } 1555bccae6eSSangbeom Kim 1565bccae6eSSangbeom Kim tm->tm_wday = data[RTC_WEEKDAY] & 0x07; 1575bccae6eSSangbeom Kim tm->tm_mday = bcd2bin(data[RTC_DATE]); 1585bccae6eSSangbeom Kim tm->tm_mon = bcd2bin(data[RTC_MONTH]); 1595bccae6eSSangbeom Kim tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100; 1605bccae6eSSangbeom Kim tm->tm_year -= 1900; 1615bccae6eSSangbeom Kim } 1625bccae6eSSangbeom Kim 1635bccae6eSSangbeom Kim static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data) 1645bccae6eSSangbeom Kim { 1655bccae6eSSangbeom Kim data[RTC_SEC] = bin2bcd(tm->tm_sec); 1665bccae6eSSangbeom Kim data[RTC_MIN] = bin2bcd(tm->tm_min); 1675bccae6eSSangbeom Kim data[RTC_HOUR] = bin2bcd(tm->tm_hour); 1685bccae6eSSangbeom Kim data[RTC_WEEKDAY] = tm->tm_wday; 1695bccae6eSSangbeom Kim data[RTC_DATE] = bin2bcd(tm->tm_mday); 1705bccae6eSSangbeom Kim data[RTC_MONTH] = bin2bcd(tm->tm_mon); 1715bccae6eSSangbeom Kim data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100); 1725bccae6eSSangbeom Kim data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100); 1735bccae6eSSangbeom Kim } 1745bccae6eSSangbeom Kim 1755bccae6eSSangbeom Kim static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm) 1765bccae6eSSangbeom Kim { 1775bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 1785bccae6eSSangbeom Kim u8 data[8]; 1795bccae6eSSangbeom Kim int ret; 1805bccae6eSSangbeom Kim 1815ccb7d71SGeert Uytterhoeven ret = regmap_bulk_read(info->regmap, SEC_RTC_SEC, data, 8); 1825bccae6eSSangbeom Kim if (ret < 0) 1835bccae6eSSangbeom Kim return ret; 1845bccae6eSSangbeom Kim 1855bccae6eSSangbeom Kim switch (info->device_type) { 1865bccae6eSSangbeom Kim case S5M8763X: 1875bccae6eSSangbeom Kim s5m8763_data_to_tm(data, tm); 1885bccae6eSSangbeom Kim break; 1895bccae6eSSangbeom Kim 1905bccae6eSSangbeom Kim case S5M8767X: 1915bccae6eSSangbeom Kim s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode); 1925bccae6eSSangbeom Kim break; 1935bccae6eSSangbeom Kim 1945bccae6eSSangbeom Kim default: 1955bccae6eSSangbeom Kim return -EINVAL; 1965bccae6eSSangbeom Kim } 1975bccae6eSSangbeom Kim 1985bccae6eSSangbeom Kim dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 1995bccae6eSSangbeom Kim 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, 2005bccae6eSSangbeom Kim tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); 2015bccae6eSSangbeom Kim 2025bccae6eSSangbeom Kim return rtc_valid_tm(tm); 2035bccae6eSSangbeom Kim } 2045bccae6eSSangbeom Kim 2055bccae6eSSangbeom Kim static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm) 2065bccae6eSSangbeom Kim { 2075bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 2085bccae6eSSangbeom Kim u8 data[8]; 2095bccae6eSSangbeom Kim int ret = 0; 2105bccae6eSSangbeom Kim 2115bccae6eSSangbeom Kim switch (info->device_type) { 2125bccae6eSSangbeom Kim case S5M8763X: 2135bccae6eSSangbeom Kim s5m8763_tm_to_data(tm, data); 2145bccae6eSSangbeom Kim break; 2155bccae6eSSangbeom Kim case S5M8767X: 2165bccae6eSSangbeom Kim ret = s5m8767_tm_to_data(tm, data); 2175bccae6eSSangbeom Kim break; 2185bccae6eSSangbeom Kim default: 2195bccae6eSSangbeom Kim return -EINVAL; 2205bccae6eSSangbeom Kim } 2215bccae6eSSangbeom Kim 2225bccae6eSSangbeom Kim if (ret < 0) 2235bccae6eSSangbeom Kim return ret; 2245bccae6eSSangbeom Kim 2255bccae6eSSangbeom Kim dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 2265bccae6eSSangbeom Kim 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, 2275bccae6eSSangbeom Kim tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); 2285bccae6eSSangbeom Kim 2295ccb7d71SGeert Uytterhoeven ret = regmap_raw_write(info->regmap, SEC_RTC_SEC, data, 8); 2305bccae6eSSangbeom Kim if (ret < 0) 2315bccae6eSSangbeom Kim return ret; 2325bccae6eSSangbeom Kim 2335bccae6eSSangbeom Kim ret = s5m8767_rtc_set_time_reg(info); 2345bccae6eSSangbeom Kim 2355bccae6eSSangbeom Kim return ret; 2365bccae6eSSangbeom Kim } 2375bccae6eSSangbeom Kim 2385bccae6eSSangbeom Kim static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) 2395bccae6eSSangbeom Kim { 2405bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 2415bccae6eSSangbeom Kim u8 data[8]; 2425bccae6eSSangbeom Kim unsigned int val; 2435bccae6eSSangbeom Kim int ret, i; 2445bccae6eSSangbeom Kim 2455ccb7d71SGeert Uytterhoeven ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8); 2465bccae6eSSangbeom Kim if (ret < 0) 2475bccae6eSSangbeom Kim return ret; 2485bccae6eSSangbeom Kim 2495bccae6eSSangbeom Kim switch (info->device_type) { 2505bccae6eSSangbeom Kim case S5M8763X: 2515bccae6eSSangbeom Kim s5m8763_data_to_tm(data, &alrm->time); 2525ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_ALARM0_CONF, &val); 2535bccae6eSSangbeom Kim if (ret < 0) 2545bccae6eSSangbeom Kim return ret; 2555bccae6eSSangbeom Kim 2565bccae6eSSangbeom Kim alrm->enabled = !!val; 2575bccae6eSSangbeom Kim 2585ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_RTC_STATUS, &val); 2595bccae6eSSangbeom Kim if (ret < 0) 2605bccae6eSSangbeom Kim return ret; 2615bccae6eSSangbeom Kim 2625bccae6eSSangbeom Kim break; 2635bccae6eSSangbeom Kim 2645bccae6eSSangbeom Kim case S5M8767X: 2655bccae6eSSangbeom Kim s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); 2665bccae6eSSangbeom Kim dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 2675bccae6eSSangbeom Kim 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, 2685bccae6eSSangbeom Kim alrm->time.tm_mday, alrm->time.tm_hour, 2695bccae6eSSangbeom Kim alrm->time.tm_min, alrm->time.tm_sec, 2705bccae6eSSangbeom Kim alrm->time.tm_wday); 2715bccae6eSSangbeom Kim 2725bccae6eSSangbeom Kim alrm->enabled = 0; 2735bccae6eSSangbeom Kim for (i = 0; i < 7; i++) { 2745bccae6eSSangbeom Kim if (data[i] & ALARM_ENABLE_MASK) { 2755bccae6eSSangbeom Kim alrm->enabled = 1; 2765bccae6eSSangbeom Kim break; 2775bccae6eSSangbeom Kim } 2785bccae6eSSangbeom Kim } 2795bccae6eSSangbeom Kim 2805bccae6eSSangbeom Kim alrm->pending = 0; 2815ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_RTC_STATUS, &val); 2825bccae6eSSangbeom Kim if (ret < 0) 2835bccae6eSSangbeom Kim return ret; 2845bccae6eSSangbeom Kim break; 2855bccae6eSSangbeom Kim 2865bccae6eSSangbeom Kim default: 2875bccae6eSSangbeom Kim return -EINVAL; 2885bccae6eSSangbeom Kim } 2895bccae6eSSangbeom Kim 2905bccae6eSSangbeom Kim if (val & ALARM0_STATUS) 2915bccae6eSSangbeom Kim alrm->pending = 1; 2925bccae6eSSangbeom Kim else 2935bccae6eSSangbeom Kim alrm->pending = 0; 2945bccae6eSSangbeom Kim 2955bccae6eSSangbeom Kim return 0; 2965bccae6eSSangbeom Kim } 2975bccae6eSSangbeom Kim 2985bccae6eSSangbeom Kim static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info) 2995bccae6eSSangbeom Kim { 3005bccae6eSSangbeom Kim u8 data[8]; 3015bccae6eSSangbeom Kim int ret, i; 3025bccae6eSSangbeom Kim struct rtc_time tm; 3035bccae6eSSangbeom Kim 3045ccb7d71SGeert Uytterhoeven ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8); 3055bccae6eSSangbeom Kim if (ret < 0) 3065bccae6eSSangbeom Kim return ret; 3075bccae6eSSangbeom Kim 3085bccae6eSSangbeom Kim s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); 3095bccae6eSSangbeom Kim dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 3105bccae6eSSangbeom Kim 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, 3115bccae6eSSangbeom Kim tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); 3125bccae6eSSangbeom Kim 3135bccae6eSSangbeom Kim switch (info->device_type) { 3145bccae6eSSangbeom Kim case S5M8763X: 3155ccb7d71SGeert Uytterhoeven ret = regmap_write(info->regmap, SEC_ALARM0_CONF, 0); 3165bccae6eSSangbeom Kim break; 3175bccae6eSSangbeom Kim 3185bccae6eSSangbeom Kim case S5M8767X: 3195bccae6eSSangbeom Kim for (i = 0; i < 7; i++) 3205bccae6eSSangbeom Kim data[i] &= ~ALARM_ENABLE_MASK; 3215bccae6eSSangbeom Kim 3225ccb7d71SGeert Uytterhoeven ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8); 3235bccae6eSSangbeom Kim if (ret < 0) 3245bccae6eSSangbeom Kim return ret; 3255bccae6eSSangbeom Kim 3265bccae6eSSangbeom Kim ret = s5m8767_rtc_set_alarm_reg(info); 3275bccae6eSSangbeom Kim 3285bccae6eSSangbeom Kim break; 3295bccae6eSSangbeom Kim 3305bccae6eSSangbeom Kim default: 3315bccae6eSSangbeom Kim return -EINVAL; 3325bccae6eSSangbeom Kim } 3335bccae6eSSangbeom Kim 3345bccae6eSSangbeom Kim return ret; 3355bccae6eSSangbeom Kim } 3365bccae6eSSangbeom Kim 3375bccae6eSSangbeom Kim static int s5m_rtc_start_alarm(struct s5m_rtc_info *info) 3385bccae6eSSangbeom Kim { 3395bccae6eSSangbeom Kim int ret; 3405bccae6eSSangbeom Kim u8 data[8]; 3415bccae6eSSangbeom Kim u8 alarm0_conf; 3425bccae6eSSangbeom Kim struct rtc_time tm; 3435bccae6eSSangbeom Kim 3445ccb7d71SGeert Uytterhoeven ret = regmap_bulk_read(info->regmap, SEC_ALARM0_SEC, data, 8); 3455bccae6eSSangbeom Kim if (ret < 0) 3465bccae6eSSangbeom Kim return ret; 3475bccae6eSSangbeom Kim 3485bccae6eSSangbeom Kim s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); 3495bccae6eSSangbeom Kim dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 3505bccae6eSSangbeom Kim 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, 3515bccae6eSSangbeom Kim tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); 3525bccae6eSSangbeom Kim 3535bccae6eSSangbeom Kim switch (info->device_type) { 3545bccae6eSSangbeom Kim case S5M8763X: 3555bccae6eSSangbeom Kim alarm0_conf = 0x77; 3565ccb7d71SGeert Uytterhoeven ret = regmap_write(info->regmap, SEC_ALARM0_CONF, alarm0_conf); 3575bccae6eSSangbeom Kim break; 3585bccae6eSSangbeom Kim 3595bccae6eSSangbeom Kim case S5M8767X: 3605bccae6eSSangbeom Kim data[RTC_SEC] |= ALARM_ENABLE_MASK; 3615bccae6eSSangbeom Kim data[RTC_MIN] |= ALARM_ENABLE_MASK; 3625bccae6eSSangbeom Kim data[RTC_HOUR] |= ALARM_ENABLE_MASK; 3635bccae6eSSangbeom Kim data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; 3645bccae6eSSangbeom Kim if (data[RTC_DATE] & 0x1f) 3655bccae6eSSangbeom Kim data[RTC_DATE] |= ALARM_ENABLE_MASK; 3665bccae6eSSangbeom Kim if (data[RTC_MONTH] & 0xf) 3675bccae6eSSangbeom Kim data[RTC_MONTH] |= ALARM_ENABLE_MASK; 3685bccae6eSSangbeom Kim if (data[RTC_YEAR1] & 0x7f) 3695bccae6eSSangbeom Kim data[RTC_YEAR1] |= ALARM_ENABLE_MASK; 3705bccae6eSSangbeom Kim 3715ccb7d71SGeert Uytterhoeven ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8); 3725bccae6eSSangbeom Kim if (ret < 0) 3735bccae6eSSangbeom Kim return ret; 3745bccae6eSSangbeom Kim ret = s5m8767_rtc_set_alarm_reg(info); 3755bccae6eSSangbeom Kim 3765bccae6eSSangbeom Kim break; 3775bccae6eSSangbeom Kim 3785bccae6eSSangbeom Kim default: 3795bccae6eSSangbeom Kim return -EINVAL; 3805bccae6eSSangbeom Kim } 3815bccae6eSSangbeom Kim 3825bccae6eSSangbeom Kim return ret; 3835bccae6eSSangbeom Kim } 3845bccae6eSSangbeom Kim 3855bccae6eSSangbeom Kim static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) 3865bccae6eSSangbeom Kim { 3875bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 3885bccae6eSSangbeom Kim u8 data[8]; 3895bccae6eSSangbeom Kim int ret; 3905bccae6eSSangbeom Kim 3915bccae6eSSangbeom Kim switch (info->device_type) { 3925bccae6eSSangbeom Kim case S5M8763X: 3935bccae6eSSangbeom Kim s5m8763_tm_to_data(&alrm->time, data); 3945bccae6eSSangbeom Kim break; 3955bccae6eSSangbeom Kim 3965bccae6eSSangbeom Kim case S5M8767X: 3975bccae6eSSangbeom Kim s5m8767_tm_to_data(&alrm->time, data); 3985bccae6eSSangbeom Kim break; 3995bccae6eSSangbeom Kim 4005bccae6eSSangbeom Kim default: 4015bccae6eSSangbeom Kim return -EINVAL; 4025bccae6eSSangbeom Kim } 4035bccae6eSSangbeom Kim 4045bccae6eSSangbeom Kim dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 4055bccae6eSSangbeom Kim 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, 4065bccae6eSSangbeom Kim alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min, 4075bccae6eSSangbeom Kim alrm->time.tm_sec, alrm->time.tm_wday); 4085bccae6eSSangbeom Kim 4095bccae6eSSangbeom Kim ret = s5m_rtc_stop_alarm(info); 4105bccae6eSSangbeom Kim if (ret < 0) 4115bccae6eSSangbeom Kim return ret; 4125bccae6eSSangbeom Kim 4135ccb7d71SGeert Uytterhoeven ret = regmap_raw_write(info->regmap, SEC_ALARM0_SEC, data, 8); 4145bccae6eSSangbeom Kim if (ret < 0) 4155bccae6eSSangbeom Kim return ret; 4165bccae6eSSangbeom Kim 4175bccae6eSSangbeom Kim ret = s5m8767_rtc_set_alarm_reg(info); 4185bccae6eSSangbeom Kim if (ret < 0) 4195bccae6eSSangbeom Kim return ret; 4205bccae6eSSangbeom Kim 4215bccae6eSSangbeom Kim if (alrm->enabled) 4225bccae6eSSangbeom Kim ret = s5m_rtc_start_alarm(info); 4235bccae6eSSangbeom Kim 4245bccae6eSSangbeom Kim return ret; 4255bccae6eSSangbeom Kim } 4265bccae6eSSangbeom Kim 4275bccae6eSSangbeom Kim static int s5m_rtc_alarm_irq_enable(struct device *dev, 4285bccae6eSSangbeom Kim unsigned int enabled) 4295bccae6eSSangbeom Kim { 4305bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 4315bccae6eSSangbeom Kim 4325bccae6eSSangbeom Kim if (enabled) 4335bccae6eSSangbeom Kim return s5m_rtc_start_alarm(info); 4345bccae6eSSangbeom Kim else 4355bccae6eSSangbeom Kim return s5m_rtc_stop_alarm(info); 4365bccae6eSSangbeom Kim } 4375bccae6eSSangbeom Kim 4385bccae6eSSangbeom Kim static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data) 4395bccae6eSSangbeom Kim { 4405bccae6eSSangbeom Kim struct s5m_rtc_info *info = data; 4415bccae6eSSangbeom Kim 4425bccae6eSSangbeom Kim rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); 4435bccae6eSSangbeom Kim 4445bccae6eSSangbeom Kim return IRQ_HANDLED; 4455bccae6eSSangbeom Kim } 4465bccae6eSSangbeom Kim 4475bccae6eSSangbeom Kim static const struct rtc_class_ops s5m_rtc_ops = { 4485bccae6eSSangbeom Kim .read_time = s5m_rtc_read_time, 4495bccae6eSSangbeom Kim .set_time = s5m_rtc_set_time, 4505bccae6eSSangbeom Kim .read_alarm = s5m_rtc_read_alarm, 4515bccae6eSSangbeom Kim .set_alarm = s5m_rtc_set_alarm, 4525bccae6eSSangbeom Kim .alarm_irq_enable = s5m_rtc_alarm_irq_enable, 4535bccae6eSSangbeom Kim }; 4545bccae6eSSangbeom Kim 4555bccae6eSSangbeom Kim static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable) 4565bccae6eSSangbeom Kim { 4575bccae6eSSangbeom Kim int ret; 4585ccb7d71SGeert Uytterhoeven ret = regmap_update_bits(info->regmap, SEC_WTSR_SMPL_CNTL, 4595bccae6eSSangbeom Kim WTSR_ENABLE_MASK, 4605bccae6eSSangbeom Kim enable ? WTSR_ENABLE_MASK : 0); 4615bccae6eSSangbeom Kim if (ret < 0) 4625bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", 4635bccae6eSSangbeom Kim __func__, ret); 4645bccae6eSSangbeom Kim } 4655bccae6eSSangbeom Kim 4665bccae6eSSangbeom Kim static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable) 4675bccae6eSSangbeom Kim { 4685bccae6eSSangbeom Kim int ret; 4695ccb7d71SGeert Uytterhoeven ret = regmap_update_bits(info->regmap, SEC_WTSR_SMPL_CNTL, 4705bccae6eSSangbeom Kim SMPL_ENABLE_MASK, 4715bccae6eSSangbeom Kim enable ? SMPL_ENABLE_MASK : 0); 4725bccae6eSSangbeom Kim if (ret < 0) 4735bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", 4745bccae6eSSangbeom Kim __func__, ret); 4755bccae6eSSangbeom Kim } 4765bccae6eSSangbeom Kim 4775bccae6eSSangbeom Kim static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) 4785bccae6eSSangbeom Kim { 4795bccae6eSSangbeom Kim u8 data[2]; 4805bccae6eSSangbeom Kim unsigned int tp_read; 4815bccae6eSSangbeom Kim int ret; 4825bccae6eSSangbeom Kim struct rtc_time tm; 4835bccae6eSSangbeom Kim 4845ccb7d71SGeert Uytterhoeven ret = regmap_read(info->regmap, SEC_RTC_UDR_CON, &tp_read); 4855bccae6eSSangbeom Kim if (ret < 0) { 4865bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to read control reg(%d)\n", 4875bccae6eSSangbeom Kim __func__, ret); 4885bccae6eSSangbeom Kim return ret; 4895bccae6eSSangbeom Kim } 4905bccae6eSSangbeom Kim 4915bccae6eSSangbeom Kim /* Set RTC control register : Binary mode, 24hour mode */ 4925bccae6eSSangbeom Kim data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); 4935bccae6eSSangbeom Kim data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); 4945bccae6eSSangbeom Kim 4955bccae6eSSangbeom Kim info->rtc_24hr_mode = 1; 4965ccb7d71SGeert Uytterhoeven ret = regmap_raw_write(info->regmap, SEC_ALARM0_CONF, data, 2); 4975bccae6eSSangbeom Kim if (ret < 0) { 4985bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", 4995bccae6eSSangbeom Kim __func__, ret); 5005bccae6eSSangbeom Kim return ret; 5015bccae6eSSangbeom Kim } 5025bccae6eSSangbeom Kim 5035bccae6eSSangbeom Kim /* In first boot time, Set rtc time to 1/1/2012 00:00:00(SUN) */ 5045bccae6eSSangbeom Kim if ((tp_read & RTC_TCON_MASK) == 0) { 5055bccae6eSSangbeom Kim dev_dbg(info->dev, "rtc init\n"); 5065bccae6eSSangbeom Kim tm.tm_sec = 0; 5075bccae6eSSangbeom Kim tm.tm_min = 0; 5085bccae6eSSangbeom Kim tm.tm_hour = 0; 5095bccae6eSSangbeom Kim tm.tm_wday = 0; 5105bccae6eSSangbeom Kim tm.tm_mday = 1; 5115bccae6eSSangbeom Kim tm.tm_mon = 0; 5125bccae6eSSangbeom Kim tm.tm_year = 112; 5135bccae6eSSangbeom Kim tm.tm_yday = 0; 5145bccae6eSSangbeom Kim tm.tm_isdst = 0; 5155bccae6eSSangbeom Kim ret = s5m_rtc_set_time(info->dev, &tm); 5165bccae6eSSangbeom Kim } 5175bccae6eSSangbeom Kim 5185ccb7d71SGeert Uytterhoeven ret = regmap_update_bits(info->regmap, SEC_RTC_UDR_CON, 5195bccae6eSSangbeom Kim RTC_TCON_MASK, tp_read | RTC_TCON_MASK); 5205bccae6eSSangbeom Kim if (ret < 0) 5215bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to update TCON reg(%d)\n", 5225bccae6eSSangbeom Kim __func__, ret); 5235bccae6eSSangbeom Kim 5245bccae6eSSangbeom Kim return ret; 5255bccae6eSSangbeom Kim } 5265bccae6eSSangbeom Kim 5275bccae6eSSangbeom Kim static int s5m_rtc_probe(struct platform_device *pdev) 5285bccae6eSSangbeom Kim { 5295bccae6eSSangbeom Kim struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent); 5305bccae6eSSangbeom Kim struct sec_platform_data *pdata = s5m87xx->pdata; 5315bccae6eSSangbeom Kim struct s5m_rtc_info *info; 5325bccae6eSSangbeom Kim int ret; 5335bccae6eSSangbeom Kim 5345bccae6eSSangbeom Kim if (!pdata) { 5355bccae6eSSangbeom Kim dev_err(pdev->dev.parent, "Platform data not supplied\n"); 5365bccae6eSSangbeom Kim return -ENODEV; 5375bccae6eSSangbeom Kim } 5385bccae6eSSangbeom Kim 5395bccae6eSSangbeom Kim info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 5405bccae6eSSangbeom Kim if (!info) 5415bccae6eSSangbeom Kim return -ENOMEM; 5425bccae6eSSangbeom Kim 5435bccae6eSSangbeom Kim info->dev = &pdev->dev; 5445bccae6eSSangbeom Kim info->s5m87xx = s5m87xx; 5455ccb7d71SGeert Uytterhoeven info->regmap = s5m87xx->regmap; 5465bccae6eSSangbeom Kim info->device_type = s5m87xx->device_type; 5475bccae6eSSangbeom Kim info->wtsr_smpl = s5m87xx->wtsr_smpl; 5485bccae6eSSangbeom Kim 5495bccae6eSSangbeom Kim switch (pdata->device_type) { 5505bccae6eSSangbeom Kim case S5M8763X: 551*7b003be8SKrzysztof Kozlowski info->irq = regmap_irq_get_virq(s5m87xx->irq_data, 552*7b003be8SKrzysztof Kozlowski S5M8763_IRQ_ALARM0); 5535bccae6eSSangbeom Kim break; 5545bccae6eSSangbeom Kim 5555bccae6eSSangbeom Kim case S5M8767X: 556*7b003be8SKrzysztof Kozlowski info->irq = regmap_irq_get_virq(s5m87xx->irq_data, 557*7b003be8SKrzysztof Kozlowski S5M8767_IRQ_RTCA1); 5585bccae6eSSangbeom Kim break; 5595bccae6eSSangbeom Kim 5605bccae6eSSangbeom Kim default: 5615bccae6eSSangbeom Kim ret = -EINVAL; 5625bccae6eSSangbeom Kim dev_err(&pdev->dev, "Unsupported device type: %d\n", ret); 5635bccae6eSSangbeom Kim return ret; 5645bccae6eSSangbeom Kim } 5655bccae6eSSangbeom Kim 5665bccae6eSSangbeom Kim platform_set_drvdata(pdev, info); 5675bccae6eSSangbeom Kim 5685bccae6eSSangbeom Kim ret = s5m8767_rtc_init_reg(info); 5695bccae6eSSangbeom Kim 5705bccae6eSSangbeom Kim if (info->wtsr_smpl) { 5715bccae6eSSangbeom Kim s5m_rtc_enable_wtsr(info, true); 5725bccae6eSSangbeom Kim s5m_rtc_enable_smpl(info, true); 5735bccae6eSSangbeom Kim } 5745bccae6eSSangbeom Kim 5755bccae6eSSangbeom Kim device_init_wakeup(&pdev->dev, 1); 5765bccae6eSSangbeom Kim 5775bccae6eSSangbeom Kim info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc", 5785bccae6eSSangbeom Kim &s5m_rtc_ops, THIS_MODULE); 5795bccae6eSSangbeom Kim 5805bccae6eSSangbeom Kim if (IS_ERR(info->rtc_dev)) 5815bccae6eSSangbeom Kim return PTR_ERR(info->rtc_dev); 5825bccae6eSSangbeom Kim 5835bccae6eSSangbeom Kim ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, 5845bccae6eSSangbeom Kim s5m_rtc_alarm_irq, 0, "rtc-alarm0", 5855bccae6eSSangbeom Kim info); 5865bccae6eSSangbeom Kim if (ret < 0) 5875bccae6eSSangbeom Kim dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", 5885bccae6eSSangbeom Kim info->irq, ret); 5895bccae6eSSangbeom Kim 5905bccae6eSSangbeom Kim return ret; 5915bccae6eSSangbeom Kim } 5925bccae6eSSangbeom Kim 5935bccae6eSSangbeom Kim static void s5m_rtc_shutdown(struct platform_device *pdev) 5945bccae6eSSangbeom Kim { 5955bccae6eSSangbeom Kim struct s5m_rtc_info *info = platform_get_drvdata(pdev); 5965bccae6eSSangbeom Kim int i; 5975bccae6eSSangbeom Kim unsigned int val = 0; 5985bccae6eSSangbeom Kim if (info->wtsr_smpl) { 5995bccae6eSSangbeom Kim for (i = 0; i < 3; i++) { 6005bccae6eSSangbeom Kim s5m_rtc_enable_wtsr(info, false); 6015ccb7d71SGeert Uytterhoeven regmap_read(info->regmap, SEC_WTSR_SMPL_CNTL, &val); 6025bccae6eSSangbeom Kim pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val); 6035bccae6eSSangbeom Kim if (val & WTSR_ENABLE_MASK) 6045bccae6eSSangbeom Kim pr_emerg("%s: fail to disable WTSR\n", 6055bccae6eSSangbeom Kim __func__); 6065bccae6eSSangbeom Kim else { 6075bccae6eSSangbeom Kim pr_info("%s: success to disable WTSR\n", 6085bccae6eSSangbeom Kim __func__); 6095bccae6eSSangbeom Kim break; 6105bccae6eSSangbeom Kim } 6115bccae6eSSangbeom Kim } 6125bccae6eSSangbeom Kim } 6135bccae6eSSangbeom Kim /* Disable SMPL when power off */ 6145bccae6eSSangbeom Kim s5m_rtc_enable_smpl(info, false); 6155bccae6eSSangbeom Kim } 6165bccae6eSSangbeom Kim 6175bccae6eSSangbeom Kim static const struct platform_device_id s5m_rtc_id[] = { 6185bccae6eSSangbeom Kim { "s5m-rtc", 0 }, 6195bccae6eSSangbeom Kim }; 6205bccae6eSSangbeom Kim 6215bccae6eSSangbeom Kim static struct platform_driver s5m_rtc_driver = { 6225bccae6eSSangbeom Kim .driver = { 6235bccae6eSSangbeom Kim .name = "s5m-rtc", 6245bccae6eSSangbeom Kim .owner = THIS_MODULE, 6255bccae6eSSangbeom Kim }, 6265bccae6eSSangbeom Kim .probe = s5m_rtc_probe, 6275bccae6eSSangbeom Kim .shutdown = s5m_rtc_shutdown, 6285bccae6eSSangbeom Kim .id_table = s5m_rtc_id, 6295bccae6eSSangbeom Kim }; 6305bccae6eSSangbeom Kim 6315bccae6eSSangbeom Kim module_platform_driver(s5m_rtc_driver); 6325bccae6eSSangbeom Kim 6335bccae6eSSangbeom Kim /* Module information */ 6345bccae6eSSangbeom Kim MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 6355bccae6eSSangbeom Kim MODULE_DESCRIPTION("Samsung S5M RTC driver"); 6365bccae6eSSangbeom Kim MODULE_LICENSE("GPL"); 6375bccae6eSSangbeom Kim MODULE_ALIAS("platform:s5m-rtc"); 638