15bccae6eSSangbeom Kim /* 2*f8b23bbdSKrzysztof Kozlowski * Copyright (c) 2013-2014 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 31d73238d4SKrzysztof Kozlowski /* 32d73238d4SKrzysztof Kozlowski * Maximum number of retries for checking changes in UDR field 33602cb5bbSKrzysztof Kozlowski * of S5M_RTC_UDR_CON register (to limit possible endless loop). 34d73238d4SKrzysztof Kozlowski * 35d73238d4SKrzysztof Kozlowski * After writing to RTC registers (setting time or alarm) read the UDR field 36602cb5bbSKrzysztof Kozlowski * in S5M_RTC_UDR_CON register. UDR is auto-cleared when data have 37d73238d4SKrzysztof Kozlowski * been transferred. 38d73238d4SKrzysztof Kozlowski */ 39d73238d4SKrzysztof Kozlowski #define UDR_READ_RETRY_CNT 5 40d73238d4SKrzysztof Kozlowski 41*f8b23bbdSKrzysztof Kozlowski /* Registers used by the driver which are different between chipsets. */ 42*f8b23bbdSKrzysztof Kozlowski struct s5m_rtc_reg_config { 43*f8b23bbdSKrzysztof Kozlowski /* Number of registers used for setting time/alarm0/alarm1 */ 44*f8b23bbdSKrzysztof Kozlowski unsigned int regs_count; 45*f8b23bbdSKrzysztof Kozlowski /* First register for time, seconds */ 46*f8b23bbdSKrzysztof Kozlowski unsigned int time; 47*f8b23bbdSKrzysztof Kozlowski /* RTC control register */ 48*f8b23bbdSKrzysztof Kozlowski unsigned int ctrl; 49*f8b23bbdSKrzysztof Kozlowski /* First register for alarm 0, seconds */ 50*f8b23bbdSKrzysztof Kozlowski unsigned int alarm0; 51*f8b23bbdSKrzysztof Kozlowski /* First register for alarm 1, seconds */ 52*f8b23bbdSKrzysztof Kozlowski unsigned int alarm1; 53*f8b23bbdSKrzysztof Kozlowski /* SMPL/WTSR register */ 54*f8b23bbdSKrzysztof Kozlowski unsigned int smpl_wtsr; 55*f8b23bbdSKrzysztof Kozlowski /* 56*f8b23bbdSKrzysztof Kozlowski * Register for update flag (UDR). Typically setting UDR field to 1 57*f8b23bbdSKrzysztof Kozlowski * will enable update of time or alarm register. Then it will be 58*f8b23bbdSKrzysztof Kozlowski * auto-cleared after successful update. 59*f8b23bbdSKrzysztof Kozlowski */ 60*f8b23bbdSKrzysztof Kozlowski unsigned int rtc_udr_update; 61*f8b23bbdSKrzysztof Kozlowski /* Mask for UDR field in 'rtc_udr_update' register */ 62*f8b23bbdSKrzysztof Kozlowski unsigned int rtc_udr_mask; 63*f8b23bbdSKrzysztof Kozlowski }; 64*f8b23bbdSKrzysztof Kozlowski 65*f8b23bbdSKrzysztof Kozlowski /* Register map for S5M8763 and S5M8767 */ 66*f8b23bbdSKrzysztof Kozlowski static const struct s5m_rtc_reg_config s5m_rtc_regs = { 67*f8b23bbdSKrzysztof Kozlowski .regs_count = 8, 68*f8b23bbdSKrzysztof Kozlowski .time = S5M_RTC_SEC, 69*f8b23bbdSKrzysztof Kozlowski .ctrl = S5M_ALARM1_CONF, 70*f8b23bbdSKrzysztof Kozlowski .alarm0 = S5M_ALARM0_SEC, 71*f8b23bbdSKrzysztof Kozlowski .alarm1 = S5M_ALARM1_SEC, 72*f8b23bbdSKrzysztof Kozlowski .smpl_wtsr = S5M_WTSR_SMPL_CNTL, 73*f8b23bbdSKrzysztof Kozlowski .rtc_udr_update = S5M_RTC_UDR_CON, 74*f8b23bbdSKrzysztof Kozlowski .rtc_udr_mask = S5M_RTC_UDR_MASK, 75*f8b23bbdSKrzysztof Kozlowski }; 76*f8b23bbdSKrzysztof Kozlowski 775bccae6eSSangbeom Kim struct s5m_rtc_info { 785bccae6eSSangbeom Kim struct device *dev; 79e349c910SKrzysztof Kozlowski struct i2c_client *i2c; 805bccae6eSSangbeom Kim struct sec_pmic_dev *s5m87xx; 815ccb7d71SGeert Uytterhoeven struct regmap *regmap; 825bccae6eSSangbeom Kim struct rtc_device *rtc_dev; 835bccae6eSSangbeom Kim int irq; 845bccae6eSSangbeom Kim int device_type; 855bccae6eSSangbeom Kim int rtc_24hr_mode; 865bccae6eSSangbeom Kim bool wtsr_smpl; 87*f8b23bbdSKrzysztof Kozlowski const struct s5m_rtc_reg_config *regs; 885bccae6eSSangbeom Kim }; 895bccae6eSSangbeom Kim 90e349c910SKrzysztof Kozlowski static const struct regmap_config s5m_rtc_regmap_config = { 91e349c910SKrzysztof Kozlowski .reg_bits = 8, 92e349c910SKrzysztof Kozlowski .val_bits = 8, 93e349c910SKrzysztof Kozlowski 94602cb5bbSKrzysztof Kozlowski .max_register = S5M_RTC_REG_MAX, 95e349c910SKrzysztof Kozlowski }; 96e349c910SKrzysztof Kozlowski 97e349c910SKrzysztof Kozlowski static const struct regmap_config s2mps14_rtc_regmap_config = { 98e349c910SKrzysztof Kozlowski .reg_bits = 8, 99e349c910SKrzysztof Kozlowski .val_bits = 8, 100e349c910SKrzysztof Kozlowski 101e349c910SKrzysztof Kozlowski .max_register = S2MPS_RTC_REG_MAX, 102e349c910SKrzysztof Kozlowski }; 103e349c910SKrzysztof Kozlowski 1045bccae6eSSangbeom Kim static void s5m8767_data_to_tm(u8 *data, struct rtc_time *tm, 1055bccae6eSSangbeom Kim int rtc_24hr_mode) 1065bccae6eSSangbeom Kim { 1075bccae6eSSangbeom Kim tm->tm_sec = data[RTC_SEC] & 0x7f; 1085bccae6eSSangbeom Kim tm->tm_min = data[RTC_MIN] & 0x7f; 1095bccae6eSSangbeom Kim if (rtc_24hr_mode) { 1105bccae6eSSangbeom Kim tm->tm_hour = data[RTC_HOUR] & 0x1f; 1115bccae6eSSangbeom Kim } else { 1125bccae6eSSangbeom Kim tm->tm_hour = data[RTC_HOUR] & 0x0f; 1135bccae6eSSangbeom Kim if (data[RTC_HOUR] & HOUR_PM_MASK) 1145bccae6eSSangbeom Kim tm->tm_hour += 12; 1155bccae6eSSangbeom Kim } 1165bccae6eSSangbeom Kim 1175bccae6eSSangbeom Kim tm->tm_wday = ffs(data[RTC_WEEKDAY] & 0x7f); 1185bccae6eSSangbeom Kim tm->tm_mday = data[RTC_DATE] & 0x1f; 1195bccae6eSSangbeom Kim tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; 1205bccae6eSSangbeom Kim tm->tm_year = (data[RTC_YEAR1] & 0x7f) + 100; 1215bccae6eSSangbeom Kim tm->tm_yday = 0; 1225bccae6eSSangbeom Kim tm->tm_isdst = 0; 1235bccae6eSSangbeom Kim } 1245bccae6eSSangbeom Kim 1255bccae6eSSangbeom Kim static int s5m8767_tm_to_data(struct rtc_time *tm, u8 *data) 1265bccae6eSSangbeom Kim { 1275bccae6eSSangbeom Kim data[RTC_SEC] = tm->tm_sec; 1285bccae6eSSangbeom Kim data[RTC_MIN] = tm->tm_min; 1295bccae6eSSangbeom Kim 1305bccae6eSSangbeom Kim if (tm->tm_hour >= 12) 1315bccae6eSSangbeom Kim data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK; 1325bccae6eSSangbeom Kim else 1335bccae6eSSangbeom Kim data[RTC_HOUR] = tm->tm_hour & ~HOUR_PM_MASK; 1345bccae6eSSangbeom Kim 1355bccae6eSSangbeom Kim data[RTC_WEEKDAY] = 1 << tm->tm_wday; 1365bccae6eSSangbeom Kim data[RTC_DATE] = tm->tm_mday; 1375bccae6eSSangbeom Kim data[RTC_MONTH] = tm->tm_mon + 1; 1385bccae6eSSangbeom Kim data[RTC_YEAR1] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0; 1395bccae6eSSangbeom Kim 1405bccae6eSSangbeom Kim if (tm->tm_year < 100) { 1415bccae6eSSangbeom Kim pr_err("s5m8767 RTC cannot handle the year %d.\n", 1425bccae6eSSangbeom Kim 1900 + tm->tm_year); 1435bccae6eSSangbeom Kim return -EINVAL; 1445bccae6eSSangbeom Kim } else { 1455bccae6eSSangbeom Kim return 0; 1465bccae6eSSangbeom Kim } 1475bccae6eSSangbeom Kim } 1485bccae6eSSangbeom Kim 149d73238d4SKrzysztof Kozlowski /* 150d73238d4SKrzysztof Kozlowski * Read RTC_UDR_CON register and wait till UDR field is cleared. 151d73238d4SKrzysztof Kozlowski * This indicates that time/alarm update ended. 152d73238d4SKrzysztof Kozlowski */ 153d73238d4SKrzysztof Kozlowski static inline int s5m8767_wait_for_udr_update(struct s5m_rtc_info *info) 154d73238d4SKrzysztof Kozlowski { 155d73238d4SKrzysztof Kozlowski int ret, retry = UDR_READ_RETRY_CNT; 156d73238d4SKrzysztof Kozlowski unsigned int data; 157d73238d4SKrzysztof Kozlowski 158d73238d4SKrzysztof Kozlowski do { 159*f8b23bbdSKrzysztof Kozlowski ret = regmap_read(info->regmap, info->regs->rtc_udr_update, 160*f8b23bbdSKrzysztof Kozlowski &data); 161*f8b23bbdSKrzysztof Kozlowski } while (--retry && (data & info->regs->rtc_udr_mask) && !ret); 162d73238d4SKrzysztof Kozlowski 163d73238d4SKrzysztof Kozlowski if (!retry) 164d73238d4SKrzysztof Kozlowski dev_err(info->dev, "waiting for UDR update, reached max number of retries\n"); 165d73238d4SKrzysztof Kozlowski 166d73238d4SKrzysztof Kozlowski return ret; 167d73238d4SKrzysztof Kozlowski } 168d73238d4SKrzysztof Kozlowski 169*f8b23bbdSKrzysztof Kozlowski static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info, 170*f8b23bbdSKrzysztof Kozlowski struct rtc_wkalrm *alarm) 171*f8b23bbdSKrzysztof Kozlowski { 172*f8b23bbdSKrzysztof Kozlowski int ret; 173*f8b23bbdSKrzysztof Kozlowski unsigned int val; 174*f8b23bbdSKrzysztof Kozlowski 175*f8b23bbdSKrzysztof Kozlowski switch (info->device_type) { 176*f8b23bbdSKrzysztof Kozlowski case S5M8767X: 177*f8b23bbdSKrzysztof Kozlowski case S5M8763X: 178*f8b23bbdSKrzysztof Kozlowski ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val); 179*f8b23bbdSKrzysztof Kozlowski val &= S5M_ALARM0_STATUS; 180*f8b23bbdSKrzysztof Kozlowski break; 181*f8b23bbdSKrzysztof Kozlowski default: 182*f8b23bbdSKrzysztof Kozlowski return -EINVAL; 183*f8b23bbdSKrzysztof Kozlowski } 184*f8b23bbdSKrzysztof Kozlowski if (ret < 0) 185*f8b23bbdSKrzysztof Kozlowski return ret; 186*f8b23bbdSKrzysztof Kozlowski 187*f8b23bbdSKrzysztof Kozlowski if (val) 188*f8b23bbdSKrzysztof Kozlowski alarm->pending = 1; 189*f8b23bbdSKrzysztof Kozlowski else 190*f8b23bbdSKrzysztof Kozlowski alarm->pending = 0; 191*f8b23bbdSKrzysztof Kozlowski 192*f8b23bbdSKrzysztof Kozlowski return 0; 193*f8b23bbdSKrzysztof Kozlowski } 194*f8b23bbdSKrzysztof Kozlowski 1955bccae6eSSangbeom Kim static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info) 1965bccae6eSSangbeom Kim { 1975bccae6eSSangbeom Kim int ret; 1985bccae6eSSangbeom Kim unsigned int data; 1995bccae6eSSangbeom Kim 200*f8b23bbdSKrzysztof Kozlowski ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data); 2015bccae6eSSangbeom Kim if (ret < 0) { 2025bccae6eSSangbeom Kim dev_err(info->dev, "failed to read update reg(%d)\n", ret); 2035bccae6eSSangbeom Kim return ret; 2045bccae6eSSangbeom Kim } 2055bccae6eSSangbeom Kim 206602cb5bbSKrzysztof Kozlowski data |= S5M_RTC_TIME_EN_MASK; 207*f8b23bbdSKrzysztof Kozlowski data |= info->regs->rtc_udr_mask; 2085bccae6eSSangbeom Kim 209*f8b23bbdSKrzysztof Kozlowski ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); 2105bccae6eSSangbeom Kim if (ret < 0) { 2115bccae6eSSangbeom Kim dev_err(info->dev, "failed to write update reg(%d)\n", ret); 2125bccae6eSSangbeom Kim return ret; 2135bccae6eSSangbeom Kim } 2145bccae6eSSangbeom Kim 215d73238d4SKrzysztof Kozlowski ret = s5m8767_wait_for_udr_update(info); 2165bccae6eSSangbeom Kim 2175bccae6eSSangbeom Kim return ret; 2185bccae6eSSangbeom Kim } 2195bccae6eSSangbeom Kim 2205bccae6eSSangbeom Kim static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info) 2215bccae6eSSangbeom Kim { 2225bccae6eSSangbeom Kim int ret; 2235bccae6eSSangbeom Kim unsigned int data; 2245bccae6eSSangbeom Kim 225*f8b23bbdSKrzysztof Kozlowski ret = regmap_read(info->regmap, info->regs->rtc_udr_update, &data); 2265bccae6eSSangbeom Kim if (ret < 0) { 2275bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to read update reg(%d)\n", 2285bccae6eSSangbeom Kim __func__, ret); 2295bccae6eSSangbeom Kim return ret; 2305bccae6eSSangbeom Kim } 2315bccae6eSSangbeom Kim 232602cb5bbSKrzysztof Kozlowski data &= ~S5M_RTC_TIME_EN_MASK; 233*f8b23bbdSKrzysztof Kozlowski data |= info->regs->rtc_udr_mask; 2345bccae6eSSangbeom Kim 235*f8b23bbdSKrzysztof Kozlowski ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); 2365bccae6eSSangbeom Kim if (ret < 0) { 2375bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to write update reg(%d)\n", 2385bccae6eSSangbeom Kim __func__, ret); 2395bccae6eSSangbeom Kim return ret; 2405bccae6eSSangbeom Kim } 2415bccae6eSSangbeom Kim 242d73238d4SKrzysztof Kozlowski ret = s5m8767_wait_for_udr_update(info); 2435bccae6eSSangbeom Kim 2445bccae6eSSangbeom Kim return ret; 2455bccae6eSSangbeom Kim } 2465bccae6eSSangbeom Kim 2475bccae6eSSangbeom Kim static void s5m8763_data_to_tm(u8 *data, struct rtc_time *tm) 2485bccae6eSSangbeom Kim { 2495bccae6eSSangbeom Kim tm->tm_sec = bcd2bin(data[RTC_SEC]); 2505bccae6eSSangbeom Kim tm->tm_min = bcd2bin(data[RTC_MIN]); 2515bccae6eSSangbeom Kim 2525bccae6eSSangbeom Kim if (data[RTC_HOUR] & HOUR_12) { 2535bccae6eSSangbeom Kim tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x1f); 2545bccae6eSSangbeom Kim if (data[RTC_HOUR] & HOUR_PM) 2555bccae6eSSangbeom Kim tm->tm_hour += 12; 2565bccae6eSSangbeom Kim } else { 2575bccae6eSSangbeom Kim tm->tm_hour = bcd2bin(data[RTC_HOUR] & 0x3f); 2585bccae6eSSangbeom Kim } 2595bccae6eSSangbeom Kim 2605bccae6eSSangbeom Kim tm->tm_wday = data[RTC_WEEKDAY] & 0x07; 2615bccae6eSSangbeom Kim tm->tm_mday = bcd2bin(data[RTC_DATE]); 2625bccae6eSSangbeom Kim tm->tm_mon = bcd2bin(data[RTC_MONTH]); 2635bccae6eSSangbeom Kim tm->tm_year = bcd2bin(data[RTC_YEAR1]) + bcd2bin(data[RTC_YEAR2]) * 100; 2645bccae6eSSangbeom Kim tm->tm_year -= 1900; 2655bccae6eSSangbeom Kim } 2665bccae6eSSangbeom Kim 2675bccae6eSSangbeom Kim static void s5m8763_tm_to_data(struct rtc_time *tm, u8 *data) 2685bccae6eSSangbeom Kim { 2695bccae6eSSangbeom Kim data[RTC_SEC] = bin2bcd(tm->tm_sec); 2705bccae6eSSangbeom Kim data[RTC_MIN] = bin2bcd(tm->tm_min); 2715bccae6eSSangbeom Kim data[RTC_HOUR] = bin2bcd(tm->tm_hour); 2725bccae6eSSangbeom Kim data[RTC_WEEKDAY] = tm->tm_wday; 2735bccae6eSSangbeom Kim data[RTC_DATE] = bin2bcd(tm->tm_mday); 2745bccae6eSSangbeom Kim data[RTC_MONTH] = bin2bcd(tm->tm_mon); 2755bccae6eSSangbeom Kim data[RTC_YEAR1] = bin2bcd(tm->tm_year % 100); 2765bccae6eSSangbeom Kim data[RTC_YEAR2] = bin2bcd((tm->tm_year + 1900) / 100); 2775bccae6eSSangbeom Kim } 2785bccae6eSSangbeom Kim 2795bccae6eSSangbeom Kim static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm) 2805bccae6eSSangbeom Kim { 2815bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 282*f8b23bbdSKrzysztof Kozlowski u8 data[info->regs->regs_count]; 2835bccae6eSSangbeom Kim int ret; 2845bccae6eSSangbeom Kim 285*f8b23bbdSKrzysztof Kozlowski ret = regmap_bulk_read(info->regmap, info->regs->time, data, 286*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 2875bccae6eSSangbeom Kim if (ret < 0) 2885bccae6eSSangbeom Kim return ret; 2895bccae6eSSangbeom Kim 2905bccae6eSSangbeom Kim switch (info->device_type) { 2915bccae6eSSangbeom Kim case S5M8763X: 2925bccae6eSSangbeom Kim s5m8763_data_to_tm(data, tm); 2935bccae6eSSangbeom Kim break; 2945bccae6eSSangbeom Kim 2955bccae6eSSangbeom Kim case S5M8767X: 2965bccae6eSSangbeom Kim s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode); 2975bccae6eSSangbeom Kim break; 2985bccae6eSSangbeom Kim 2995bccae6eSSangbeom Kim default: 3005bccae6eSSangbeom Kim return -EINVAL; 3015bccae6eSSangbeom Kim } 3025bccae6eSSangbeom Kim 3035bccae6eSSangbeom Kim dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 3045bccae6eSSangbeom Kim 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, 3055bccae6eSSangbeom Kim tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); 3065bccae6eSSangbeom Kim 3075bccae6eSSangbeom Kim return rtc_valid_tm(tm); 3085bccae6eSSangbeom Kim } 3095bccae6eSSangbeom Kim 3105bccae6eSSangbeom Kim static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm) 3115bccae6eSSangbeom Kim { 3125bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 313*f8b23bbdSKrzysztof Kozlowski u8 data[info->regs->regs_count]; 3145bccae6eSSangbeom Kim int ret = 0; 3155bccae6eSSangbeom Kim 3165bccae6eSSangbeom Kim switch (info->device_type) { 3175bccae6eSSangbeom Kim case S5M8763X: 3185bccae6eSSangbeom Kim s5m8763_tm_to_data(tm, data); 3195bccae6eSSangbeom Kim break; 3205bccae6eSSangbeom Kim case S5M8767X: 3215bccae6eSSangbeom Kim ret = s5m8767_tm_to_data(tm, data); 3225bccae6eSSangbeom Kim break; 3235bccae6eSSangbeom Kim default: 3245bccae6eSSangbeom Kim return -EINVAL; 3255bccae6eSSangbeom Kim } 3265bccae6eSSangbeom Kim 3275bccae6eSSangbeom Kim if (ret < 0) 3285bccae6eSSangbeom Kim return ret; 3295bccae6eSSangbeom Kim 3305bccae6eSSangbeom Kim dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 3315bccae6eSSangbeom Kim 1900 + tm->tm_year, 1 + tm->tm_mon, tm->tm_mday, 3325bccae6eSSangbeom Kim tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_wday); 3335bccae6eSSangbeom Kim 334*f8b23bbdSKrzysztof Kozlowski ret = regmap_raw_write(info->regmap, info->regs->time, data, 335*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 3365bccae6eSSangbeom Kim if (ret < 0) 3375bccae6eSSangbeom Kim return ret; 3385bccae6eSSangbeom Kim 3395bccae6eSSangbeom Kim ret = s5m8767_rtc_set_time_reg(info); 3405bccae6eSSangbeom Kim 3415bccae6eSSangbeom Kim return ret; 3425bccae6eSSangbeom Kim } 3435bccae6eSSangbeom Kim 3445bccae6eSSangbeom Kim static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) 3455bccae6eSSangbeom Kim { 3465bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 347*f8b23bbdSKrzysztof Kozlowski u8 data[info->regs->regs_count]; 3485bccae6eSSangbeom Kim unsigned int val; 3495bccae6eSSangbeom Kim int ret, i; 3505bccae6eSSangbeom Kim 351*f8b23bbdSKrzysztof Kozlowski ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, 352*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 3535bccae6eSSangbeom Kim if (ret < 0) 3545bccae6eSSangbeom Kim return ret; 3555bccae6eSSangbeom Kim 3565bccae6eSSangbeom Kim switch (info->device_type) { 3575bccae6eSSangbeom Kim case S5M8763X: 3585bccae6eSSangbeom Kim s5m8763_data_to_tm(data, &alrm->time); 359602cb5bbSKrzysztof Kozlowski ret = regmap_read(info->regmap, S5M_ALARM0_CONF, &val); 3605bccae6eSSangbeom Kim if (ret < 0) 3615bccae6eSSangbeom Kim return ret; 3625bccae6eSSangbeom Kim 3635bccae6eSSangbeom Kim alrm->enabled = !!val; 3645bccae6eSSangbeom Kim break; 3655bccae6eSSangbeom Kim 3665bccae6eSSangbeom Kim case S5M8767X: 3675bccae6eSSangbeom Kim s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); 3685bccae6eSSangbeom Kim alrm->enabled = 0; 369*f8b23bbdSKrzysztof Kozlowski for (i = 0; i < info->regs->regs_count; i++) { 3705bccae6eSSangbeom Kim if (data[i] & ALARM_ENABLE_MASK) { 3715bccae6eSSangbeom Kim alrm->enabled = 1; 3725bccae6eSSangbeom Kim break; 3735bccae6eSSangbeom Kim } 3745bccae6eSSangbeom Kim } 3755bccae6eSSangbeom Kim break; 3765bccae6eSSangbeom Kim 3775bccae6eSSangbeom Kim default: 3785bccae6eSSangbeom Kim return -EINVAL; 3795bccae6eSSangbeom Kim } 3805bccae6eSSangbeom Kim 381*f8b23bbdSKrzysztof Kozlowski dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 382*f8b23bbdSKrzysztof Kozlowski 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, 383*f8b23bbdSKrzysztof Kozlowski alrm->time.tm_mday, alrm->time.tm_hour, 384*f8b23bbdSKrzysztof Kozlowski alrm->time.tm_min, alrm->time.tm_sec, 385*f8b23bbdSKrzysztof Kozlowski alrm->time.tm_wday); 386*f8b23bbdSKrzysztof Kozlowski 387*f8b23bbdSKrzysztof Kozlowski ret = s5m_check_peding_alarm_interrupt(info, alrm); 3885bccae6eSSangbeom Kim 3895bccae6eSSangbeom Kim return 0; 3905bccae6eSSangbeom Kim } 3915bccae6eSSangbeom Kim 3925bccae6eSSangbeom Kim static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info) 3935bccae6eSSangbeom Kim { 394*f8b23bbdSKrzysztof Kozlowski u8 data[info->regs->regs_count]; 3955bccae6eSSangbeom Kim int ret, i; 3965bccae6eSSangbeom Kim struct rtc_time tm; 3975bccae6eSSangbeom Kim 398*f8b23bbdSKrzysztof Kozlowski ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, 399*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 4005bccae6eSSangbeom Kim if (ret < 0) 4015bccae6eSSangbeom Kim return ret; 4025bccae6eSSangbeom Kim 4035bccae6eSSangbeom Kim s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); 4045bccae6eSSangbeom Kim dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 4055bccae6eSSangbeom Kim 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, 4065bccae6eSSangbeom Kim tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); 4075bccae6eSSangbeom Kim 4085bccae6eSSangbeom Kim switch (info->device_type) { 4095bccae6eSSangbeom Kim case S5M8763X: 410602cb5bbSKrzysztof Kozlowski ret = regmap_write(info->regmap, S5M_ALARM0_CONF, 0); 4115bccae6eSSangbeom Kim break; 4125bccae6eSSangbeom Kim 4135bccae6eSSangbeom Kim case S5M8767X: 414*f8b23bbdSKrzysztof Kozlowski for (i = 0; i < info->regs->regs_count; i++) 4155bccae6eSSangbeom Kim data[i] &= ~ALARM_ENABLE_MASK; 4165bccae6eSSangbeom Kim 417*f8b23bbdSKrzysztof Kozlowski ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, 418*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 4195bccae6eSSangbeom Kim if (ret < 0) 4205bccae6eSSangbeom Kim return ret; 4215bccae6eSSangbeom Kim 4225bccae6eSSangbeom Kim ret = s5m8767_rtc_set_alarm_reg(info); 4235bccae6eSSangbeom Kim 4245bccae6eSSangbeom Kim break; 4255bccae6eSSangbeom Kim 4265bccae6eSSangbeom Kim default: 4275bccae6eSSangbeom Kim return -EINVAL; 4285bccae6eSSangbeom Kim } 4295bccae6eSSangbeom Kim 4305bccae6eSSangbeom Kim return ret; 4315bccae6eSSangbeom Kim } 4325bccae6eSSangbeom Kim 4335bccae6eSSangbeom Kim static int s5m_rtc_start_alarm(struct s5m_rtc_info *info) 4345bccae6eSSangbeom Kim { 4355bccae6eSSangbeom Kim int ret; 436*f8b23bbdSKrzysztof Kozlowski u8 data[info->regs->regs_count]; 4375bccae6eSSangbeom Kim u8 alarm0_conf; 4385bccae6eSSangbeom Kim struct rtc_time tm; 4395bccae6eSSangbeom Kim 440*f8b23bbdSKrzysztof Kozlowski ret = regmap_bulk_read(info->regmap, info->regs->alarm0, data, 441*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 4425bccae6eSSangbeom Kim if (ret < 0) 4435bccae6eSSangbeom Kim return ret; 4445bccae6eSSangbeom Kim 4455bccae6eSSangbeom Kim s5m8767_data_to_tm(data, &tm, info->rtc_24hr_mode); 4465bccae6eSSangbeom Kim dev_dbg(info->dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 4475bccae6eSSangbeom Kim 1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday, 4485bccae6eSSangbeom Kim tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday); 4495bccae6eSSangbeom Kim 4505bccae6eSSangbeom Kim switch (info->device_type) { 4515bccae6eSSangbeom Kim case S5M8763X: 4525bccae6eSSangbeom Kim alarm0_conf = 0x77; 453602cb5bbSKrzysztof Kozlowski ret = regmap_write(info->regmap, S5M_ALARM0_CONF, alarm0_conf); 4545bccae6eSSangbeom Kim break; 4555bccae6eSSangbeom Kim 4565bccae6eSSangbeom Kim case S5M8767X: 4575bccae6eSSangbeom Kim data[RTC_SEC] |= ALARM_ENABLE_MASK; 4585bccae6eSSangbeom Kim data[RTC_MIN] |= ALARM_ENABLE_MASK; 4595bccae6eSSangbeom Kim data[RTC_HOUR] |= ALARM_ENABLE_MASK; 4605bccae6eSSangbeom Kim data[RTC_WEEKDAY] &= ~ALARM_ENABLE_MASK; 4615bccae6eSSangbeom Kim if (data[RTC_DATE] & 0x1f) 4625bccae6eSSangbeom Kim data[RTC_DATE] |= ALARM_ENABLE_MASK; 4635bccae6eSSangbeom Kim if (data[RTC_MONTH] & 0xf) 4645bccae6eSSangbeom Kim data[RTC_MONTH] |= ALARM_ENABLE_MASK; 4655bccae6eSSangbeom Kim if (data[RTC_YEAR1] & 0x7f) 4665bccae6eSSangbeom Kim data[RTC_YEAR1] |= ALARM_ENABLE_MASK; 4675bccae6eSSangbeom Kim 468*f8b23bbdSKrzysztof Kozlowski ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, 469*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 4705bccae6eSSangbeom Kim if (ret < 0) 4715bccae6eSSangbeom Kim return ret; 4725bccae6eSSangbeom Kim ret = s5m8767_rtc_set_alarm_reg(info); 4735bccae6eSSangbeom Kim 4745bccae6eSSangbeom Kim break; 4755bccae6eSSangbeom Kim 4765bccae6eSSangbeom Kim default: 4775bccae6eSSangbeom Kim return -EINVAL; 4785bccae6eSSangbeom Kim } 4795bccae6eSSangbeom Kim 4805bccae6eSSangbeom Kim return ret; 4815bccae6eSSangbeom Kim } 4825bccae6eSSangbeom Kim 4835bccae6eSSangbeom Kim static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) 4845bccae6eSSangbeom Kim { 4855bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 486*f8b23bbdSKrzysztof Kozlowski u8 data[info->regs->regs_count]; 4875bccae6eSSangbeom Kim int ret; 4885bccae6eSSangbeom Kim 4895bccae6eSSangbeom Kim switch (info->device_type) { 4905bccae6eSSangbeom Kim case S5M8763X: 4915bccae6eSSangbeom Kim s5m8763_tm_to_data(&alrm->time, data); 4925bccae6eSSangbeom Kim break; 4935bccae6eSSangbeom Kim 4945bccae6eSSangbeom Kim case S5M8767X: 4955bccae6eSSangbeom Kim s5m8767_tm_to_data(&alrm->time, data); 4965bccae6eSSangbeom Kim break; 4975bccae6eSSangbeom Kim 4985bccae6eSSangbeom Kim default: 4995bccae6eSSangbeom Kim return -EINVAL; 5005bccae6eSSangbeom Kim } 5015bccae6eSSangbeom Kim 5025bccae6eSSangbeom Kim dev_dbg(dev, "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__, 5035bccae6eSSangbeom Kim 1900 + alrm->time.tm_year, 1 + alrm->time.tm_mon, 5045bccae6eSSangbeom Kim alrm->time.tm_mday, alrm->time.tm_hour, alrm->time.tm_min, 5055bccae6eSSangbeom Kim alrm->time.tm_sec, alrm->time.tm_wday); 5065bccae6eSSangbeom Kim 5075bccae6eSSangbeom Kim ret = s5m_rtc_stop_alarm(info); 5085bccae6eSSangbeom Kim if (ret < 0) 5095bccae6eSSangbeom Kim return ret; 5105bccae6eSSangbeom Kim 511*f8b23bbdSKrzysztof Kozlowski ret = regmap_raw_write(info->regmap, info->regs->alarm0, data, 512*f8b23bbdSKrzysztof Kozlowski info->regs->regs_count); 5135bccae6eSSangbeom Kim if (ret < 0) 5145bccae6eSSangbeom Kim return ret; 5155bccae6eSSangbeom Kim 5165bccae6eSSangbeom Kim ret = s5m8767_rtc_set_alarm_reg(info); 5175bccae6eSSangbeom Kim if (ret < 0) 5185bccae6eSSangbeom Kim return ret; 5195bccae6eSSangbeom Kim 5205bccae6eSSangbeom Kim if (alrm->enabled) 5215bccae6eSSangbeom Kim ret = s5m_rtc_start_alarm(info); 5225bccae6eSSangbeom Kim 5235bccae6eSSangbeom Kim return ret; 5245bccae6eSSangbeom Kim } 5255bccae6eSSangbeom Kim 5265bccae6eSSangbeom Kim static int s5m_rtc_alarm_irq_enable(struct device *dev, 5275bccae6eSSangbeom Kim unsigned int enabled) 5285bccae6eSSangbeom Kim { 5295bccae6eSSangbeom Kim struct s5m_rtc_info *info = dev_get_drvdata(dev); 5305bccae6eSSangbeom Kim 5315bccae6eSSangbeom Kim if (enabled) 5325bccae6eSSangbeom Kim return s5m_rtc_start_alarm(info); 5335bccae6eSSangbeom Kim else 5345bccae6eSSangbeom Kim return s5m_rtc_stop_alarm(info); 5355bccae6eSSangbeom Kim } 5365bccae6eSSangbeom Kim 5375bccae6eSSangbeom Kim static irqreturn_t s5m_rtc_alarm_irq(int irq, void *data) 5385bccae6eSSangbeom Kim { 5395bccae6eSSangbeom Kim struct s5m_rtc_info *info = data; 5405bccae6eSSangbeom Kim 5415bccae6eSSangbeom Kim rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF); 5425bccae6eSSangbeom Kim 5435bccae6eSSangbeom Kim return IRQ_HANDLED; 5445bccae6eSSangbeom Kim } 5455bccae6eSSangbeom Kim 5465bccae6eSSangbeom Kim static const struct rtc_class_ops s5m_rtc_ops = { 5475bccae6eSSangbeom Kim .read_time = s5m_rtc_read_time, 5485bccae6eSSangbeom Kim .set_time = s5m_rtc_set_time, 5495bccae6eSSangbeom Kim .read_alarm = s5m_rtc_read_alarm, 5505bccae6eSSangbeom Kim .set_alarm = s5m_rtc_set_alarm, 5515bccae6eSSangbeom Kim .alarm_irq_enable = s5m_rtc_alarm_irq_enable, 5525bccae6eSSangbeom Kim }; 5535bccae6eSSangbeom Kim 5545bccae6eSSangbeom Kim static void s5m_rtc_enable_wtsr(struct s5m_rtc_info *info, bool enable) 5555bccae6eSSangbeom Kim { 5565bccae6eSSangbeom Kim int ret; 557*f8b23bbdSKrzysztof Kozlowski ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr, 5585bccae6eSSangbeom Kim WTSR_ENABLE_MASK, 5595bccae6eSSangbeom Kim enable ? WTSR_ENABLE_MASK : 0); 5605bccae6eSSangbeom Kim if (ret < 0) 5615bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n", 5625bccae6eSSangbeom Kim __func__, ret); 5635bccae6eSSangbeom Kim } 5645bccae6eSSangbeom Kim 5655bccae6eSSangbeom Kim static void s5m_rtc_enable_smpl(struct s5m_rtc_info *info, bool enable) 5665bccae6eSSangbeom Kim { 5675bccae6eSSangbeom Kim int ret; 568*f8b23bbdSKrzysztof Kozlowski ret = regmap_update_bits(info->regmap, info->regs->smpl_wtsr, 5695bccae6eSSangbeom Kim SMPL_ENABLE_MASK, 5705bccae6eSSangbeom Kim enable ? SMPL_ENABLE_MASK : 0); 5715bccae6eSSangbeom Kim if (ret < 0) 5725bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to update SMPL reg(%d)\n", 5735bccae6eSSangbeom Kim __func__, ret); 5745bccae6eSSangbeom Kim } 5755bccae6eSSangbeom Kim 5765bccae6eSSangbeom Kim static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) 5775bccae6eSSangbeom Kim { 5785bccae6eSSangbeom Kim u8 data[2]; 5795bccae6eSSangbeom Kim int ret; 5805bccae6eSSangbeom Kim 5810c5f5d9aSKrzysztof Kozlowski /* UDR update time. Default of 7.32 ms is too long. */ 5820c5f5d9aSKrzysztof Kozlowski ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON, 5830c5f5d9aSKrzysztof Kozlowski S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US); 5840c5f5d9aSKrzysztof Kozlowski if (ret < 0) 5850c5f5d9aSKrzysztof Kozlowski dev_err(info->dev, "%s: fail to change UDR time: %d\n", 5860c5f5d9aSKrzysztof Kozlowski __func__, ret); 5870c5f5d9aSKrzysztof Kozlowski 5885bccae6eSSangbeom Kim /* Set RTC control register : Binary mode, 24hour mode */ 5895bccae6eSSangbeom Kim data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); 5905bccae6eSSangbeom Kim data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); 5915bccae6eSSangbeom Kim 5925bccae6eSSangbeom Kim info->rtc_24hr_mode = 1; 593602cb5bbSKrzysztof Kozlowski ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2); 5945bccae6eSSangbeom Kim if (ret < 0) { 5955bccae6eSSangbeom Kim dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", 5965bccae6eSSangbeom Kim __func__, ret); 5975bccae6eSSangbeom Kim return ret; 5985bccae6eSSangbeom Kim } 5995bccae6eSSangbeom Kim 6005bccae6eSSangbeom Kim return ret; 6015bccae6eSSangbeom Kim } 6025bccae6eSSangbeom Kim 6035bccae6eSSangbeom Kim static int s5m_rtc_probe(struct platform_device *pdev) 6045bccae6eSSangbeom Kim { 6055bccae6eSSangbeom Kim struct sec_pmic_dev *s5m87xx = dev_get_drvdata(pdev->dev.parent); 6065bccae6eSSangbeom Kim struct sec_platform_data *pdata = s5m87xx->pdata; 6075bccae6eSSangbeom Kim struct s5m_rtc_info *info; 608e349c910SKrzysztof Kozlowski const struct regmap_config *regmap_cfg; 6095bccae6eSSangbeom Kim int ret; 6105bccae6eSSangbeom Kim 6115bccae6eSSangbeom Kim if (!pdata) { 6125bccae6eSSangbeom Kim dev_err(pdev->dev.parent, "Platform data not supplied\n"); 6135bccae6eSSangbeom Kim return -ENODEV; 6145bccae6eSSangbeom Kim } 6155bccae6eSSangbeom Kim 6165bccae6eSSangbeom Kim info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 6175bccae6eSSangbeom Kim if (!info) 6185bccae6eSSangbeom Kim return -ENOMEM; 6195bccae6eSSangbeom Kim 620e349c910SKrzysztof Kozlowski switch (pdata->device_type) { 621e349c910SKrzysztof Kozlowski case S2MPS14X: 622e349c910SKrzysztof Kozlowski regmap_cfg = &s2mps14_rtc_regmap_config; 623e349c910SKrzysztof Kozlowski break; 624e349c910SKrzysztof Kozlowski case S5M8763X: 625e349c910SKrzysztof Kozlowski regmap_cfg = &s5m_rtc_regmap_config; 626*f8b23bbdSKrzysztof Kozlowski info->regs = &s5m_rtc_regs; 627e349c910SKrzysztof Kozlowski break; 628e349c910SKrzysztof Kozlowski case S5M8767X: 629e349c910SKrzysztof Kozlowski regmap_cfg = &s5m_rtc_regmap_config; 630*f8b23bbdSKrzysztof Kozlowski info->regs = &s5m_rtc_regs; 631e349c910SKrzysztof Kozlowski break; 632e349c910SKrzysztof Kozlowski default: 633e349c910SKrzysztof Kozlowski dev_err(&pdev->dev, "Device type is not supported by RTC driver\n"); 634e349c910SKrzysztof Kozlowski return -ENODEV; 635e349c910SKrzysztof Kozlowski } 636e349c910SKrzysztof Kozlowski 637e349c910SKrzysztof Kozlowski info->i2c = i2c_new_dummy(s5m87xx->i2c->adapter, RTC_I2C_ADDR); 638e349c910SKrzysztof Kozlowski if (!info->i2c) { 639e349c910SKrzysztof Kozlowski dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n"); 640e349c910SKrzysztof Kozlowski return -ENODEV; 641e349c910SKrzysztof Kozlowski } 642e349c910SKrzysztof Kozlowski 643e349c910SKrzysztof Kozlowski info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg); 644e349c910SKrzysztof Kozlowski if (IS_ERR(info->regmap)) { 645e349c910SKrzysztof Kozlowski ret = PTR_ERR(info->regmap); 646e349c910SKrzysztof Kozlowski dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n", 647e349c910SKrzysztof Kozlowski ret); 648e349c910SKrzysztof Kozlowski goto err; 649e349c910SKrzysztof Kozlowski } 650e349c910SKrzysztof Kozlowski 6515bccae6eSSangbeom Kim info->dev = &pdev->dev; 6525bccae6eSSangbeom Kim info->s5m87xx = s5m87xx; 6535bccae6eSSangbeom Kim info->device_type = s5m87xx->device_type; 6545bccae6eSSangbeom Kim info->wtsr_smpl = s5m87xx->wtsr_smpl; 6555bccae6eSSangbeom Kim 6565bccae6eSSangbeom Kim switch (pdata->device_type) { 6575bccae6eSSangbeom Kim case S5M8763X: 6587b003be8SKrzysztof Kozlowski info->irq = regmap_irq_get_virq(s5m87xx->irq_data, 6597b003be8SKrzysztof Kozlowski S5M8763_IRQ_ALARM0); 6605bccae6eSSangbeom Kim break; 6615bccae6eSSangbeom Kim 6625bccae6eSSangbeom Kim case S5M8767X: 6637b003be8SKrzysztof Kozlowski info->irq = regmap_irq_get_virq(s5m87xx->irq_data, 6647b003be8SKrzysztof Kozlowski S5M8767_IRQ_RTCA1); 6655bccae6eSSangbeom Kim break; 6665bccae6eSSangbeom Kim 6675bccae6eSSangbeom Kim default: 6685bccae6eSSangbeom Kim ret = -EINVAL; 6695bccae6eSSangbeom Kim dev_err(&pdev->dev, "Unsupported device type: %d\n", ret); 670e349c910SKrzysztof Kozlowski goto err; 6715bccae6eSSangbeom Kim } 6725bccae6eSSangbeom Kim 6735bccae6eSSangbeom Kim platform_set_drvdata(pdev, info); 6745bccae6eSSangbeom Kim 6755bccae6eSSangbeom Kim ret = s5m8767_rtc_init_reg(info); 6765bccae6eSSangbeom Kim 6775bccae6eSSangbeom Kim if (info->wtsr_smpl) { 6785bccae6eSSangbeom Kim s5m_rtc_enable_wtsr(info, true); 6795bccae6eSSangbeom Kim s5m_rtc_enable_smpl(info, true); 6805bccae6eSSangbeom Kim } 6815bccae6eSSangbeom Kim 6825bccae6eSSangbeom Kim device_init_wakeup(&pdev->dev, 1); 6835bccae6eSSangbeom Kim 6845bccae6eSSangbeom Kim info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc", 6855bccae6eSSangbeom Kim &s5m_rtc_ops, THIS_MODULE); 6865bccae6eSSangbeom Kim 687e349c910SKrzysztof Kozlowski if (IS_ERR(info->rtc_dev)) { 688e349c910SKrzysztof Kozlowski ret = PTR_ERR(info->rtc_dev); 689e349c910SKrzysztof Kozlowski goto err; 690e349c910SKrzysztof Kozlowski } 6915bccae6eSSangbeom Kim 6925bccae6eSSangbeom Kim ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, 6935bccae6eSSangbeom Kim s5m_rtc_alarm_irq, 0, "rtc-alarm0", 6945bccae6eSSangbeom Kim info); 695e349c910SKrzysztof Kozlowski if (ret < 0) { 6965bccae6eSSangbeom Kim dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", 6975bccae6eSSangbeom Kim info->irq, ret); 698e349c910SKrzysztof Kozlowski goto err; 699e349c910SKrzysztof Kozlowski } 700e349c910SKrzysztof Kozlowski 701e349c910SKrzysztof Kozlowski return 0; 702e349c910SKrzysztof Kozlowski 703e349c910SKrzysztof Kozlowski err: 704e349c910SKrzysztof Kozlowski i2c_unregister_device(info->i2c); 7055bccae6eSSangbeom Kim 7065bccae6eSSangbeom Kim return ret; 7075bccae6eSSangbeom Kim } 7085bccae6eSSangbeom Kim 7095bccae6eSSangbeom Kim static void s5m_rtc_shutdown(struct platform_device *pdev) 7105bccae6eSSangbeom Kim { 7115bccae6eSSangbeom Kim struct s5m_rtc_info *info = platform_get_drvdata(pdev); 7125bccae6eSSangbeom Kim int i; 7135bccae6eSSangbeom Kim unsigned int val = 0; 7145bccae6eSSangbeom Kim if (info->wtsr_smpl) { 7155bccae6eSSangbeom Kim for (i = 0; i < 3; i++) { 7165bccae6eSSangbeom Kim s5m_rtc_enable_wtsr(info, false); 717*f8b23bbdSKrzysztof Kozlowski regmap_read(info->regmap, info->regs->smpl_wtsr, &val); 7185bccae6eSSangbeom Kim pr_debug("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val); 7195bccae6eSSangbeom Kim if (val & WTSR_ENABLE_MASK) 7205bccae6eSSangbeom Kim pr_emerg("%s: fail to disable WTSR\n", 7215bccae6eSSangbeom Kim __func__); 7225bccae6eSSangbeom Kim else { 7235bccae6eSSangbeom Kim pr_info("%s: success to disable WTSR\n", 7245bccae6eSSangbeom Kim __func__); 7255bccae6eSSangbeom Kim break; 7265bccae6eSSangbeom Kim } 7275bccae6eSSangbeom Kim } 7285bccae6eSSangbeom Kim } 7295bccae6eSSangbeom Kim /* Disable SMPL when power off */ 7305bccae6eSSangbeom Kim s5m_rtc_enable_smpl(info, false); 7315bccae6eSSangbeom Kim } 7325bccae6eSSangbeom Kim 733e349c910SKrzysztof Kozlowski static int s5m_rtc_remove(struct platform_device *pdev) 734e349c910SKrzysztof Kozlowski { 735e349c910SKrzysztof Kozlowski struct s5m_rtc_info *info = platform_get_drvdata(pdev); 736e349c910SKrzysztof Kozlowski 737e349c910SKrzysztof Kozlowski /* Perform also all shutdown steps when removing */ 738e349c910SKrzysztof Kozlowski s5m_rtc_shutdown(pdev); 739e349c910SKrzysztof Kozlowski i2c_unregister_device(info->i2c); 740e349c910SKrzysztof Kozlowski 741e349c910SKrzysztof Kozlowski return 0; 742e349c910SKrzysztof Kozlowski } 743e349c910SKrzysztof Kozlowski 74411ba5a1eSGeert Uytterhoeven #ifdef CONFIG_PM_SLEEP 745222ead7fSKrzysztof Kozlowski static int s5m_rtc_resume(struct device *dev) 746222ead7fSKrzysztof Kozlowski { 747222ead7fSKrzysztof Kozlowski struct s5m_rtc_info *info = dev_get_drvdata(dev); 748222ead7fSKrzysztof Kozlowski int ret = 0; 749222ead7fSKrzysztof Kozlowski 750222ead7fSKrzysztof Kozlowski if (device_may_wakeup(dev)) 751222ead7fSKrzysztof Kozlowski ret = disable_irq_wake(info->irq); 752222ead7fSKrzysztof Kozlowski 753222ead7fSKrzysztof Kozlowski return ret; 754222ead7fSKrzysztof Kozlowski } 755222ead7fSKrzysztof Kozlowski 756222ead7fSKrzysztof Kozlowski static int s5m_rtc_suspend(struct device *dev) 757222ead7fSKrzysztof Kozlowski { 758222ead7fSKrzysztof Kozlowski struct s5m_rtc_info *info = dev_get_drvdata(dev); 759222ead7fSKrzysztof Kozlowski int ret = 0; 760222ead7fSKrzysztof Kozlowski 761222ead7fSKrzysztof Kozlowski if (device_may_wakeup(dev)) 762222ead7fSKrzysztof Kozlowski ret = enable_irq_wake(info->irq); 763222ead7fSKrzysztof Kozlowski 764222ead7fSKrzysztof Kozlowski return ret; 765222ead7fSKrzysztof Kozlowski } 76611ba5a1eSGeert Uytterhoeven #endif /* CONFIG_PM_SLEEP */ 767222ead7fSKrzysztof Kozlowski 768222ead7fSKrzysztof Kozlowski static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume); 769222ead7fSKrzysztof Kozlowski 7705bccae6eSSangbeom Kim static const struct platform_device_id s5m_rtc_id[] = { 7715bccae6eSSangbeom Kim { "s5m-rtc", 0 }, 7725bccae6eSSangbeom Kim }; 7735bccae6eSSangbeom Kim 7745bccae6eSSangbeom Kim static struct platform_driver s5m_rtc_driver = { 7755bccae6eSSangbeom Kim .driver = { 7765bccae6eSSangbeom Kim .name = "s5m-rtc", 7775bccae6eSSangbeom Kim .owner = THIS_MODULE, 778222ead7fSKrzysztof Kozlowski .pm = &s5m_rtc_pm_ops, 7795bccae6eSSangbeom Kim }, 7805bccae6eSSangbeom Kim .probe = s5m_rtc_probe, 781e349c910SKrzysztof Kozlowski .remove = s5m_rtc_remove, 7825bccae6eSSangbeom Kim .shutdown = s5m_rtc_shutdown, 7835bccae6eSSangbeom Kim .id_table = s5m_rtc_id, 7845bccae6eSSangbeom Kim }; 7855bccae6eSSangbeom Kim 7865bccae6eSSangbeom Kim module_platform_driver(s5m_rtc_driver); 7875bccae6eSSangbeom Kim 7885bccae6eSSangbeom Kim /* Module information */ 7895bccae6eSSangbeom Kim MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 7905bccae6eSSangbeom Kim MODULE_DESCRIPTION("Samsung S5M RTC driver"); 7915bccae6eSSangbeom Kim MODULE_LICENSE("GPL"); 7925bccae6eSSangbeom Kim MODULE_ALIAS("platform:s5m-rtc"); 793