David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * TI OMAP1 Real Time Clock interface for Linux |
| 3 | * |
| 4 | * Copyright (C) 2003 MontaVista Software, Inc. |
| 5 | * Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com> |
| 6 | * |
| 7 | * Copyright (C) 2006 David Brownell (new RTC framework) |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/ioport.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/rtc.h> |
| 21 | #include <linux/bcd.h> |
| 22 | #include <linux/platform_device.h> |
Afzal Mohammed | 9e0344d | 2012-12-17 16:02:15 -0800 | [diff] [blame] | 23 | #include <linux/of.h> |
| 24 | #include <linux/of_device.h> |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 25 | #include <linux/pm_runtime.h> |
Sachin Kamat | 4b30c9f | 2013-07-03 15:06:00 -0700 | [diff] [blame] | 26 | #include <linux/io.h> |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 27 | |
| 28 | /* The OMAP1 RTC is a year/month/day/hours/minutes/seconds BCD clock |
| 29 | * with century-range alarm matching, driven by the 32kHz clock. |
| 30 | * |
| 31 | * The main user-visible ways it differs from PC RTCs are by omitting |
| 32 | * "don't care" alarm fields and sub-second periodic IRQs, and having |
| 33 | * an autoadjust mechanism to calibrate to the true oscillator rate. |
| 34 | * |
| 35 | * Board-specific wiring options include using split power mode with |
| 36 | * RTC_OFF_NOFF used as the reset signal (so the RTC won't be reset), |
| 37 | * and wiring RTC_WAKE_INT (so the RTC alarm can wake the system from |
Sekhar Nori | fa5b078 | 2010-10-27 15:33:05 -0700 | [diff] [blame] | 38 | * low power modes) for OMAP1 boards (OMAP-L138 has this built into |
| 39 | * the SoC). See the BOARD-SPECIFIC CUSTOMIZATION comment. |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 40 | */ |
| 41 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 42 | /* RTC registers */ |
| 43 | #define OMAP_RTC_SECONDS_REG 0x00 |
| 44 | #define OMAP_RTC_MINUTES_REG 0x04 |
| 45 | #define OMAP_RTC_HOURS_REG 0x08 |
| 46 | #define OMAP_RTC_DAYS_REG 0x0C |
| 47 | #define OMAP_RTC_MONTHS_REG 0x10 |
| 48 | #define OMAP_RTC_YEARS_REG 0x14 |
| 49 | #define OMAP_RTC_WEEKS_REG 0x18 |
| 50 | |
| 51 | #define OMAP_RTC_ALARM_SECONDS_REG 0x20 |
| 52 | #define OMAP_RTC_ALARM_MINUTES_REG 0x24 |
| 53 | #define OMAP_RTC_ALARM_HOURS_REG 0x28 |
| 54 | #define OMAP_RTC_ALARM_DAYS_REG 0x2c |
| 55 | #define OMAP_RTC_ALARM_MONTHS_REG 0x30 |
| 56 | #define OMAP_RTC_ALARM_YEARS_REG 0x34 |
| 57 | |
| 58 | #define OMAP_RTC_CTRL_REG 0x40 |
| 59 | #define OMAP_RTC_STATUS_REG 0x44 |
| 60 | #define OMAP_RTC_INTERRUPTS_REG 0x48 |
| 61 | |
| 62 | #define OMAP_RTC_COMP_LSB_REG 0x4c |
| 63 | #define OMAP_RTC_COMP_MSB_REG 0x50 |
| 64 | #define OMAP_RTC_OSC_REG 0x54 |
| 65 | |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 66 | #define OMAP_RTC_KICK0_REG 0x6c |
| 67 | #define OMAP_RTC_KICK1_REG 0x70 |
| 68 | |
Hebbar Gururaja | 8af750e | 2013-09-11 14:24:18 -0700 | [diff] [blame] | 69 | #define OMAP_RTC_IRQWAKEEN 0x7c |
| 70 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 71 | /* OMAP_RTC_CTRL_REG bit fields: */ |
Sekhar Nori | 92adb96 | 2014-06-06 14:36:05 -0700 | [diff] [blame] | 72 | #define OMAP_RTC_CTRL_SPLIT BIT(7) |
| 73 | #define OMAP_RTC_CTRL_DISABLE BIT(6) |
| 74 | #define OMAP_RTC_CTRL_SET_32_COUNTER BIT(5) |
| 75 | #define OMAP_RTC_CTRL_TEST BIT(4) |
| 76 | #define OMAP_RTC_CTRL_MODE_12_24 BIT(3) |
| 77 | #define OMAP_RTC_CTRL_AUTO_COMP BIT(2) |
| 78 | #define OMAP_RTC_CTRL_ROUND_30S BIT(1) |
| 79 | #define OMAP_RTC_CTRL_STOP BIT(0) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 80 | |
| 81 | /* OMAP_RTC_STATUS_REG bit fields: */ |
Sekhar Nori | 92adb96 | 2014-06-06 14:36:05 -0700 | [diff] [blame] | 82 | #define OMAP_RTC_STATUS_POWER_UP BIT(7) |
| 83 | #define OMAP_RTC_STATUS_ALARM BIT(6) |
| 84 | #define OMAP_RTC_STATUS_1D_EVENT BIT(5) |
| 85 | #define OMAP_RTC_STATUS_1H_EVENT BIT(4) |
| 86 | #define OMAP_RTC_STATUS_1M_EVENT BIT(3) |
| 87 | #define OMAP_RTC_STATUS_1S_EVENT BIT(2) |
| 88 | #define OMAP_RTC_STATUS_RUN BIT(1) |
| 89 | #define OMAP_RTC_STATUS_BUSY BIT(0) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 90 | |
| 91 | /* OMAP_RTC_INTERRUPTS_REG bit fields: */ |
Sekhar Nori | 92adb96 | 2014-06-06 14:36:05 -0700 | [diff] [blame] | 92 | #define OMAP_RTC_INTERRUPTS_IT_ALARM BIT(3) |
| 93 | #define OMAP_RTC_INTERRUPTS_IT_TIMER BIT(2) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 94 | |
Sekhar Nori | cd914bb | 2014-06-06 14:36:06 -0700 | [diff] [blame] | 95 | /* OMAP_RTC_OSC_REG bit fields: */ |
| 96 | #define OMAP_RTC_OSC_32KCLK_EN BIT(6) |
| 97 | |
Hebbar Gururaja | 8af750e | 2013-09-11 14:24:18 -0700 | [diff] [blame] | 98 | /* OMAP_RTC_IRQWAKEEN bit fields: */ |
Sekhar Nori | 92adb96 | 2014-06-06 14:36:05 -0700 | [diff] [blame] | 99 | #define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN BIT(1) |
Hebbar Gururaja | 8af750e | 2013-09-11 14:24:18 -0700 | [diff] [blame] | 100 | |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 101 | /* OMAP_RTC_KICKER values */ |
| 102 | #define KICK0_VALUE 0x83e70b13 |
| 103 | #define KICK1_VALUE 0x95a4f1e0 |
| 104 | |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 105 | struct omap_rtc_device_type { |
| 106 | bool has_32kclk_en; |
| 107 | bool has_kicker; |
| 108 | bool has_irqwakeen; |
| 109 | }; |
Sekhar Nori | cd914bb | 2014-06-06 14:36:06 -0700 | [diff] [blame] | 110 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 111 | struct omap_rtc { |
| 112 | struct rtc_device *rtc; |
| 113 | void __iomem *base; |
| 114 | int irq_alarm; |
| 115 | int irq_timer; |
| 116 | u8 interrupts_reg; |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 117 | const struct omap_rtc_device_type *type; |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 118 | }; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 119 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 120 | static inline u8 rtc_read(struct omap_rtc *rtc, unsigned int reg) |
| 121 | { |
| 122 | return readb(rtc->base + reg); |
| 123 | } |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 124 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 125 | static inline void rtc_write(struct omap_rtc *rtc, unsigned int reg, u8 val) |
| 126 | { |
| 127 | writeb(val, rtc->base + reg); |
| 128 | } |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 129 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 130 | static inline void rtc_writel(struct omap_rtc *rtc, unsigned int reg, u32 val) |
| 131 | { |
| 132 | writel(val, rtc->base + reg); |
| 133 | } |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 134 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 135 | /* we rely on the rtc framework to handle locking (rtc->ops_lock), |
| 136 | * so the only other requirement is that register accesses which |
| 137 | * require BUSY to be clear are made with IRQs locally disabled |
| 138 | */ |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 139 | static void rtc_wait_not_busy(struct omap_rtc *rtc) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 140 | { |
| 141 | int count = 0; |
| 142 | u8 status; |
| 143 | |
| 144 | /* BUSY may stay active for 1/32768 second (~30 usec) */ |
| 145 | for (count = 0; count < 50; count++) { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 146 | status = rtc_read(rtc, OMAP_RTC_STATUS_REG); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 147 | if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0) |
| 148 | break; |
| 149 | udelay(1); |
| 150 | } |
| 151 | /* now we have ~15 usec to read/write various registers */ |
| 152 | } |
| 153 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 154 | static irqreturn_t rtc_irq(int irq, void *dev_id) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 155 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 156 | struct omap_rtc *rtc = dev_id; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 157 | unsigned long events = 0; |
| 158 | u8 irq_data; |
| 159 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 160 | irq_data = rtc_read(rtc, OMAP_RTC_STATUS_REG); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 161 | |
| 162 | /* alarm irq? */ |
| 163 | if (irq_data & OMAP_RTC_STATUS_ALARM) { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 164 | rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_ALARM); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 165 | events |= RTC_IRQF | RTC_AF; |
| 166 | } |
| 167 | |
| 168 | /* 1/sec periodic/update irq? */ |
| 169 | if (irq_data & OMAP_RTC_STATUS_1S_EVENT) |
| 170 | events |= RTC_IRQF | RTC_UF; |
| 171 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 172 | rtc_update_irq(rtc->rtc, 1, events); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 173 | |
| 174 | return IRQ_HANDLED; |
| 175 | } |
| 176 | |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 177 | static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) |
| 178 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 179 | struct omap_rtc *rtc = dev_get_drvdata(dev); |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 180 | u8 reg, irqwake_reg = 0; |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 181 | |
| 182 | local_irq_disable(); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 183 | rtc_wait_not_busy(rtc); |
| 184 | reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG); |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 185 | if (rtc->type->has_irqwakeen) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 186 | irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN); |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 187 | |
| 188 | if (enabled) { |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 189 | reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 190 | irqwake_reg |= OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; |
| 191 | } else { |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 192 | reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 193 | irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; |
| 194 | } |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 195 | rtc_wait_not_busy(rtc); |
| 196 | rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg); |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 197 | if (rtc->type->has_irqwakeen) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 198 | rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg); |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 199 | local_irq_enable(); |
| 200 | |
| 201 | return 0; |
| 202 | } |
| 203 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 204 | /* this hardware doesn't support "don't care" alarm fields */ |
| 205 | static int tm2bcd(struct rtc_time *tm) |
| 206 | { |
| 207 | if (rtc_valid_tm(tm) != 0) |
| 208 | return -EINVAL; |
| 209 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 210 | tm->tm_sec = bin2bcd(tm->tm_sec); |
| 211 | tm->tm_min = bin2bcd(tm->tm_min); |
| 212 | tm->tm_hour = bin2bcd(tm->tm_hour); |
| 213 | tm->tm_mday = bin2bcd(tm->tm_mday); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 214 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 215 | tm->tm_mon = bin2bcd(tm->tm_mon + 1); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 216 | |
| 217 | /* epoch == 1900 */ |
| 218 | if (tm->tm_year < 100 || tm->tm_year > 199) |
| 219 | return -EINVAL; |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 220 | tm->tm_year = bin2bcd(tm->tm_year - 100); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static void bcd2tm(struct rtc_time *tm) |
| 226 | { |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 227 | tm->tm_sec = bcd2bin(tm->tm_sec); |
| 228 | tm->tm_min = bcd2bin(tm->tm_min); |
| 229 | tm->tm_hour = bcd2bin(tm->tm_hour); |
| 230 | tm->tm_mday = bcd2bin(tm->tm_mday); |
| 231 | tm->tm_mon = bcd2bin(tm->tm_mon) - 1; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 232 | /* epoch == 1900 */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 233 | tm->tm_year = bcd2bin(tm->tm_year) + 100; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | |
| 237 | static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm) |
| 238 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 239 | struct omap_rtc *rtc = dev_get_drvdata(dev); |
| 240 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 241 | /* we don't report wday/yday/isdst ... */ |
| 242 | local_irq_disable(); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 243 | rtc_wait_not_busy(rtc); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 244 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 245 | tm->tm_sec = rtc_read(rtc, OMAP_RTC_SECONDS_REG); |
| 246 | tm->tm_min = rtc_read(rtc, OMAP_RTC_MINUTES_REG); |
| 247 | tm->tm_hour = rtc_read(rtc, OMAP_RTC_HOURS_REG); |
| 248 | tm->tm_mday = rtc_read(rtc, OMAP_RTC_DAYS_REG); |
| 249 | tm->tm_mon = rtc_read(rtc, OMAP_RTC_MONTHS_REG); |
| 250 | tm->tm_year = rtc_read(rtc, OMAP_RTC_YEARS_REG); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 251 | |
| 252 | local_irq_enable(); |
| 253 | |
| 254 | bcd2tm(tm); |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm) |
| 259 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 260 | struct omap_rtc *rtc = dev_get_drvdata(dev); |
| 261 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 262 | if (tm2bcd(tm) < 0) |
| 263 | return -EINVAL; |
| 264 | local_irq_disable(); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 265 | rtc_wait_not_busy(rtc); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 266 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 267 | rtc_write(rtc, OMAP_RTC_YEARS_REG, tm->tm_year); |
| 268 | rtc_write(rtc, OMAP_RTC_MONTHS_REG, tm->tm_mon); |
| 269 | rtc_write(rtc, OMAP_RTC_DAYS_REG, tm->tm_mday); |
| 270 | rtc_write(rtc, OMAP_RTC_HOURS_REG, tm->tm_hour); |
| 271 | rtc_write(rtc, OMAP_RTC_MINUTES_REG, tm->tm_min); |
| 272 | rtc_write(rtc, OMAP_RTC_SECONDS_REG, tm->tm_sec); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 273 | |
| 274 | local_irq_enable(); |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) |
| 280 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 281 | struct omap_rtc *rtc = dev_get_drvdata(dev); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 282 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 283 | local_irq_disable(); |
| 284 | rtc_wait_not_busy(rtc); |
| 285 | |
| 286 | alm->time.tm_sec = rtc_read(rtc, OMAP_RTC_ALARM_SECONDS_REG); |
| 287 | alm->time.tm_min = rtc_read(rtc, OMAP_RTC_ALARM_MINUTES_REG); |
| 288 | alm->time.tm_hour = rtc_read(rtc, OMAP_RTC_ALARM_HOURS_REG); |
| 289 | alm->time.tm_mday = rtc_read(rtc, OMAP_RTC_ALARM_DAYS_REG); |
| 290 | alm->time.tm_mon = rtc_read(rtc, OMAP_RTC_ALARM_MONTHS_REG); |
| 291 | alm->time.tm_year = rtc_read(rtc, OMAP_RTC_ALARM_YEARS_REG); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 292 | |
| 293 | local_irq_enable(); |
| 294 | |
| 295 | bcd2tm(&alm->time); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 296 | alm->enabled = !!(rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 297 | & OMAP_RTC_INTERRUPTS_IT_ALARM); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 298 | |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) |
| 303 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 304 | struct omap_rtc *rtc = dev_get_drvdata(dev); |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 305 | u8 reg, irqwake_reg = 0; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 306 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 307 | if (tm2bcd(&alm->time) < 0) |
| 308 | return -EINVAL; |
| 309 | |
| 310 | local_irq_disable(); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 311 | rtc_wait_not_busy(rtc); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 312 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 313 | rtc_write(rtc, OMAP_RTC_ALARM_YEARS_REG, alm->time.tm_year); |
| 314 | rtc_write(rtc, OMAP_RTC_ALARM_MONTHS_REG, alm->time.tm_mon); |
| 315 | rtc_write(rtc, OMAP_RTC_ALARM_DAYS_REG, alm->time.tm_mday); |
| 316 | rtc_write(rtc, OMAP_RTC_ALARM_HOURS_REG, alm->time.tm_hour); |
| 317 | rtc_write(rtc, OMAP_RTC_ALARM_MINUTES_REG, alm->time.tm_min); |
| 318 | rtc_write(rtc, OMAP_RTC_ALARM_SECONDS_REG, alm->time.tm_sec); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 319 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 320 | reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG); |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 321 | if (rtc->type->has_irqwakeen) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 322 | irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN); |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 323 | |
| 324 | if (alm->enabled) { |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 325 | reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 326 | irqwake_reg |= OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; |
| 327 | } else { |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 328 | reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 329 | irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN; |
| 330 | } |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 331 | rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg); |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 332 | if (rtc->type->has_irqwakeen) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 333 | rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 334 | |
| 335 | local_irq_enable(); |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | static struct rtc_class_ops omap_rtc_ops = { |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 341 | .read_time = omap_rtc_read_time, |
| 342 | .set_time = omap_rtc_set_time, |
| 343 | .read_alarm = omap_rtc_read_alarm, |
| 344 | .set_alarm = omap_rtc_set_alarm, |
John Stultz | 16380c1 | 2011-02-02 17:02:41 -0800 | [diff] [blame] | 345 | .alarm_irq_enable = omap_rtc_alarm_irq_enable, |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 346 | }; |
| 347 | |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 348 | static const struct omap_rtc_device_type omap_rtc_default_type = { |
| 349 | }; |
Afzal Mohammed | 9e0344d | 2012-12-17 16:02:15 -0800 | [diff] [blame] | 350 | |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 351 | static const struct omap_rtc_device_type omap_rtc_am3352_type = { |
| 352 | .has_32kclk_en = true, |
| 353 | .has_kicker = true, |
| 354 | .has_irqwakeen = true, |
| 355 | }; |
| 356 | |
| 357 | static const struct omap_rtc_device_type omap_rtc_da830_type = { |
| 358 | .has_kicker = true, |
| 359 | }; |
| 360 | |
| 361 | static const struct platform_device_id omap_rtc_id_table[] = { |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 362 | { |
Johan Hovold | a430ca2 | 2014-12-10 15:52:58 -0800 | [diff] [blame] | 363 | .name = "omap_rtc", |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 364 | .driver_data = (kernel_ulong_t)&omap_rtc_default_type, |
| 365 | }, { |
Hebbar Gururaja | 8af750e | 2013-09-11 14:24:18 -0700 | [diff] [blame] | 366 | .name = "am3352-rtc", |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 367 | .driver_data = (kernel_ulong_t)&omap_rtc_am3352_type, |
| 368 | }, { |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 369 | .name = "da830-rtc", |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 370 | .driver_data = (kernel_ulong_t)&omap_rtc_da830_type, |
| 371 | }, { |
| 372 | /* sentinel */ |
| 373 | } |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 374 | }; |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 375 | MODULE_DEVICE_TABLE(platform, omap_rtc_id_table); |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 376 | |
Afzal Mohammed | 9e0344d | 2012-12-17 16:02:15 -0800 | [diff] [blame] | 377 | static const struct of_device_id omap_rtc_of_match[] = { |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 378 | { |
| 379 | .compatible = "ti,am3352-rtc", |
| 380 | .data = &omap_rtc_am3352_type, |
| 381 | }, { |
| 382 | .compatible = "ti,da830-rtc", |
| 383 | .data = &omap_rtc_da830_type, |
| 384 | }, { |
| 385 | /* sentinel */ |
| 386 | } |
Afzal Mohammed | 9e0344d | 2012-12-17 16:02:15 -0800 | [diff] [blame] | 387 | }; |
| 388 | MODULE_DEVICE_TABLE(of, omap_rtc_of_match); |
| 389 | |
David Brownell | 71fc822 | 2008-07-23 21:30:38 -0700 | [diff] [blame] | 390 | static int __init omap_rtc_probe(struct platform_device *pdev) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 391 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 392 | struct omap_rtc *rtc; |
Vishwanathrao Badarkhe, Manish | 3765e8f | 2013-04-29 16:20:04 -0700 | [diff] [blame] | 393 | struct resource *res; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 394 | u8 reg, new_ctrl; |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 395 | const struct platform_device_id *id_entry; |
Afzal Mohammed | 9e0344d | 2012-12-17 16:02:15 -0800 | [diff] [blame] | 396 | const struct of_device_id *of_id; |
Johan Hovold | 437b37a | 2014-12-10 15:52:40 -0800 | [diff] [blame] | 397 | int ret; |
Afzal Mohammed | 9e0344d | 2012-12-17 16:02:15 -0800 | [diff] [blame] | 398 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 399 | rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); |
| 400 | if (!rtc) |
| 401 | return -ENOMEM; |
| 402 | |
Afzal Mohammed | 9e0344d | 2012-12-17 16:02:15 -0800 | [diff] [blame] | 403 | of_id = of_match_device(omap_rtc_of_match, &pdev->dev); |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 404 | if (of_id) { |
| 405 | rtc->type = of_id->data; |
| 406 | } else { |
| 407 | id_entry = platform_get_device_id(pdev); |
| 408 | rtc->type = (void *)id_entry->driver_data; |
Sekhar Nori | 337b600 | 2014-06-06 14:36:04 -0700 | [diff] [blame] | 409 | } |
| 410 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 411 | rtc->irq_timer = platform_get_irq(pdev, 0); |
| 412 | if (rtc->irq_timer <= 0) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 413 | return -ENOENT; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 414 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 415 | rtc->irq_alarm = platform_get_irq(pdev, 1); |
| 416 | if (rtc->irq_alarm <= 0) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 417 | return -ENOENT; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 418 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 419 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 420 | rtc->base = devm_ioremap_resource(&pdev->dev, res); |
| 421 | if (IS_ERR(rtc->base)) |
| 422 | return PTR_ERR(rtc->base); |
| 423 | |
| 424 | platform_set_drvdata(pdev, rtc); |
Mark A. Greer | 8cfde8c | 2009-12-15 16:46:11 -0800 | [diff] [blame] | 425 | |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 426 | /* Enable the clock/module so that we can access the registers */ |
| 427 | pm_runtime_enable(&pdev->dev); |
| 428 | pm_runtime_get_sync(&pdev->dev); |
| 429 | |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 430 | if (rtc->type->has_kicker) { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 431 | rtc_writel(rtc, OMAP_RTC_KICK0_REG, KICK0_VALUE); |
| 432 | rtc_writel(rtc, OMAP_RTC_KICK1_REG, KICK1_VALUE); |
Afzal Mohammed | cab1458 | 2012-12-17 16:02:11 -0800 | [diff] [blame] | 433 | } |
| 434 | |
Johan Hovold | 1ed8b5d | 2014-12-10 15:52:36 -0800 | [diff] [blame] | 435 | /* |
| 436 | * disable interrupts |
| 437 | * |
| 438 | * NOTE: ALARM2 is not cleared on AM3352 if rtc_write (writeb) is used |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 439 | */ |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 440 | rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG, 0); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 441 | |
Sekhar Nori | cd914bb | 2014-06-06 14:36:06 -0700 | [diff] [blame] | 442 | /* enable RTC functional clock */ |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 443 | if (rtc->type->has_32kclk_en) { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 444 | reg = rtc_read(rtc, OMAP_RTC_OSC_REG); |
| 445 | rtc_writel(rtc, OMAP_RTC_OSC_REG, |
| 446 | reg | OMAP_RTC_OSC_32KCLK_EN); |
Johan Hovold | 44c63a5 | 2014-12-10 15:52:30 -0800 | [diff] [blame] | 447 | } |
Sekhar Nori | cd914bb | 2014-06-06 14:36:06 -0700 | [diff] [blame] | 448 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 449 | /* clear old status */ |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 450 | reg = rtc_read(rtc, OMAP_RTC_STATUS_REG); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 451 | if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) { |
Johan Hovold | 397b630 | 2014-12-10 15:52:49 -0800 | [diff] [blame] | 452 | dev_info(&pdev->dev, "RTC power up reset detected\n"); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 453 | rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_POWER_UP); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 454 | } |
| 455 | if (reg & (u8) OMAP_RTC_STATUS_ALARM) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 456 | rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_ALARM); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 457 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 458 | /* On boards with split power, RTC_ON_NOFF won't reset the RTC */ |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 459 | reg = rtc_read(rtc, OMAP_RTC_CTRL_REG); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 460 | if (reg & (u8) OMAP_RTC_CTRL_STOP) |
Johan Hovold | 397b630 | 2014-12-10 15:52:49 -0800 | [diff] [blame] | 461 | dev_info(&pdev->dev, "already running\n"); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 462 | |
| 463 | /* force to 24 hour mode */ |
Daniel Glöckner | 12b3e03 | 2011-08-03 16:21:02 -0700 | [diff] [blame] | 464 | new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 465 | new_ctrl |= OMAP_RTC_CTRL_STOP; |
| 466 | |
| 467 | /* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE: |
| 468 | * |
Sekhar Nori | fa5b078 | 2010-10-27 15:33:05 -0700 | [diff] [blame] | 469 | * - Device wake-up capability setting should come through chip |
| 470 | * init logic. OMAP1 boards should initialize the "wakeup capable" |
| 471 | * flag in the platform device if the board is wired right for |
| 472 | * being woken up by RTC alarm. For OMAP-L138, this capability |
| 473 | * is built into the SoC by the "Deep Sleep" capability. |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 474 | * |
| 475 | * - Boards wired so RTC_ON_nOFF is used as the reset signal, |
| 476 | * rather than nPWRON_RESET, should forcibly enable split |
| 477 | * power mode. (Some chip errata report that RTC_CTRL_SPLIT |
| 478 | * is write-only, and always reads as zero...) |
| 479 | */ |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 480 | |
| 481 | if (new_ctrl & (u8) OMAP_RTC_CTRL_SPLIT) |
Johan Hovold | 397b630 | 2014-12-10 15:52:49 -0800 | [diff] [blame] | 482 | dev_info(&pdev->dev, "split power mode\n"); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 483 | |
| 484 | if (reg != new_ctrl) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 485 | rtc_write(rtc, OMAP_RTC_CTRL_REG, new_ctrl); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 486 | |
Johan Hovold | 4390ce0 | 2014-12-10 15:52:43 -0800 | [diff] [blame] | 487 | device_init_wakeup(&pdev->dev, true); |
| 488 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 489 | rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, |
Johan Hovold | 4390ce0 | 2014-12-10 15:52:43 -0800 | [diff] [blame] | 490 | &omap_rtc_ops, THIS_MODULE); |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 491 | if (IS_ERR(rtc->rtc)) { |
| 492 | ret = PTR_ERR(rtc->rtc); |
Johan Hovold | 4390ce0 | 2014-12-10 15:52:43 -0800 | [diff] [blame] | 493 | goto err; |
| 494 | } |
Johan Hovold | 4390ce0 | 2014-12-10 15:52:43 -0800 | [diff] [blame] | 495 | |
| 496 | /* handle periodic and alarm irqs */ |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 497 | ret = devm_request_irq(&pdev->dev, rtc->irq_timer, rtc_irq, 0, |
| 498 | dev_name(&rtc->rtc->dev), rtc); |
Johan Hovold | 4390ce0 | 2014-12-10 15:52:43 -0800 | [diff] [blame] | 499 | if (ret) |
| 500 | goto err; |
| 501 | |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 502 | if (rtc->irq_timer != rtc->irq_alarm) { |
| 503 | ret = devm_request_irq(&pdev->dev, rtc->irq_alarm, rtc_irq, 0, |
| 504 | dev_name(&rtc->rtc->dev), rtc); |
Johan Hovold | 4390ce0 | 2014-12-10 15:52:43 -0800 | [diff] [blame] | 505 | if (ret) |
| 506 | goto err; |
| 507 | } |
| 508 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 509 | return 0; |
| 510 | |
Johan Hovold | 437b37a | 2014-12-10 15:52:40 -0800 | [diff] [blame] | 511 | err: |
Johan Hovold | 7ecd9a3 | 2014-12-10 15:52:33 -0800 | [diff] [blame] | 512 | device_init_wakeup(&pdev->dev, false); |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 513 | if (rtc->type->has_kicker) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 514 | rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0); |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 515 | pm_runtime_put_sync(&pdev->dev); |
| 516 | pm_runtime_disable(&pdev->dev); |
Johan Hovold | 437b37a | 2014-12-10 15:52:40 -0800 | [diff] [blame] | 517 | |
| 518 | return ret; |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 519 | } |
| 520 | |
David Brownell | 71fc822 | 2008-07-23 21:30:38 -0700 | [diff] [blame] | 521 | static int __exit omap_rtc_remove(struct platform_device *pdev) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 522 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 523 | struct omap_rtc *rtc = platform_get_drvdata(pdev); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 524 | |
| 525 | device_init_wakeup(&pdev->dev, 0); |
| 526 | |
| 527 | /* leave rtc running, but disable irqs */ |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 528 | rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 529 | |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 530 | if (rtc->type->has_kicker) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 531 | rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0); |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 532 | |
| 533 | /* Disable the clock/module */ |
| 534 | pm_runtime_put_sync(&pdev->dev); |
| 535 | pm_runtime_disable(&pdev->dev); |
| 536 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 537 | return 0; |
| 538 | } |
| 539 | |
Jingoo Han | 04ebc35 | 2013-04-29 16:21:01 -0700 | [diff] [blame] | 540 | #ifdef CONFIG_PM_SLEEP |
Jingoo Han | 04ebc35 | 2013-04-29 16:21:01 -0700 | [diff] [blame] | 541 | static int omap_rtc_suspend(struct device *dev) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 542 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 543 | struct omap_rtc *rtc = dev_get_drvdata(dev); |
| 544 | |
| 545 | rtc->interrupts_reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 546 | |
| 547 | /* FIXME the RTC alarm is not currently acting as a wakeup event |
Hebbar Gururaja | 8af750e | 2013-09-11 14:24:18 -0700 | [diff] [blame] | 548 | * source on some platforms, and in fact this enable() call is just |
| 549 | * saving a flag that's never used... |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 550 | */ |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 551 | if (device_may_wakeup(dev)) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 552 | enable_irq_wake(rtc->irq_alarm); |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 553 | else |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 554 | rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 555 | |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 556 | /* Disable the clock/module */ |
Jingoo Han | 04ebc35 | 2013-04-29 16:21:01 -0700 | [diff] [blame] | 557 | pm_runtime_put_sync(dev); |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 558 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 559 | return 0; |
| 560 | } |
| 561 | |
Jingoo Han | 04ebc35 | 2013-04-29 16:21:01 -0700 | [diff] [blame] | 562 | static int omap_rtc_resume(struct device *dev) |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 563 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 564 | struct omap_rtc *rtc = dev_get_drvdata(dev); |
| 565 | |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 566 | /* Enable the clock/module so that we can access the registers */ |
Jingoo Han | 04ebc35 | 2013-04-29 16:21:01 -0700 | [diff] [blame] | 567 | pm_runtime_get_sync(dev); |
Vaibhav Hiremath | fc9bd90 | 2012-12-17 16:02:18 -0800 | [diff] [blame] | 568 | |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 569 | if (device_may_wakeup(dev)) |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 570 | disable_irq_wake(rtc->irq_alarm); |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 571 | else |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 572 | rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, rtc->interrupts_reg); |
Lokesh Vutla | ab7f580 | 2014-06-06 14:36:12 -0700 | [diff] [blame] | 573 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 574 | return 0; |
| 575 | } |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 576 | #endif |
| 577 | |
Jingoo Han | 04ebc35 | 2013-04-29 16:21:01 -0700 | [diff] [blame] | 578 | static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume); |
| 579 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 580 | static void omap_rtc_shutdown(struct platform_device *pdev) |
| 581 | { |
Johan Hovold | 55ba953 | 2014-12-10 15:52:55 -0800 | [diff] [blame] | 582 | struct omap_rtc *rtc = platform_get_drvdata(pdev); |
| 583 | |
| 584 | rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 585 | } |
| 586 | |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 587 | static struct platform_driver omap_rtc_driver = { |
David Brownell | 71fc822 | 2008-07-23 21:30:38 -0700 | [diff] [blame] | 588 | .remove = __exit_p(omap_rtc_remove), |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 589 | .shutdown = omap_rtc_shutdown, |
| 590 | .driver = { |
Johan Hovold | a430ca2 | 2014-12-10 15:52:58 -0800 | [diff] [blame] | 591 | .name = "omap_rtc", |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 592 | .owner = THIS_MODULE, |
Jingoo Han | 04ebc35 | 2013-04-29 16:21:01 -0700 | [diff] [blame] | 593 | .pm = &omap_rtc_pm_ops, |
Sachin Kamat | 616b734 | 2013-11-12 15:10:55 -0800 | [diff] [blame] | 594 | .of_match_table = omap_rtc_of_match, |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 595 | }, |
Johan Hovold | 2153f94 | 2014-12-10 15:53:01 -0800 | [diff] [blame^] | 596 | .id_table = omap_rtc_id_table, |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 597 | }; |
| 598 | |
Jingoo Han | 09c5a36 | 2013-04-29 16:18:46 -0700 | [diff] [blame] | 599 | module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 600 | |
Johan Hovold | a430ca2 | 2014-12-10 15:52:58 -0800 | [diff] [blame] | 601 | MODULE_ALIAS("platform:omap_rtc"); |
David Brownell | db68b18 | 2006-12-06 20:38:36 -0800 | [diff] [blame] | 602 | MODULE_AUTHOR("George G. Davis (and others)"); |
| 603 | MODULE_LICENSE("GPL"); |