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Ben Dooks1add6782006-07-01 04:36:26 -07001/* drivers/rtc/rtc-s3c.c
2 *
Atul Dahiyae48add82010-07-20 12:19:14 +05303 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com/
5 *
Ben Dooks1add6782006-07-01 04:36:26 -07006 * Copyright (c) 2004,2006 Simtec Electronics
7 * Ben Dooks, <ben@simtec.co.uk>
8 * http://armlinux.simtec.co.uk/
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * S3C2410/S3C2440/S3C24XX Internal RTC Driver
15*/
16
17#include <linux/module.h>
18#include <linux/fs.h>
19#include <linux/string.h>
20#include <linux/init.h>
21#include <linux/platform_device.h>
22#include <linux/interrupt.h>
23#include <linux/rtc.h>
24#include <linux/bcd.h>
25#include <linux/clk.h>
Robert P. J. Day9974b6e2008-02-06 01:38:42 -080026#include <linux/log2.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090027#include <linux/slab.h>
Thomas Abraham39ce4082011-10-24 14:49:04 +020028#include <linux/of.h>
Sachin Kamatdbd9acb2012-07-30 14:41:48 -070029#include <linux/uaccess.h>
30#include <linux/io.h>
Ben Dooks1add6782006-07-01 04:36:26 -070031
Ben Dooks1add6782006-07-01 04:36:26 -070032#include <asm/irq.h>
Arnd Bergmannb9d7c5d2013-03-05 12:04:37 +010033#include "rtc-s3c.h"
Ben Dooks1add6782006-07-01 04:36:26 -070034
Chanwoo Choi19be09f2014-10-13 15:52:28 -070035struct s3c_rtc {
36 struct device *dev;
37 struct rtc_device *rtc;
Ben Dooks1add6782006-07-01 04:36:26 -070038
Chanwoo Choi19be09f2014-10-13 15:52:28 -070039 void __iomem *base;
40 struct clk *rtc_clk;
Chanwoo Choidf9e26d2014-10-13 15:52:35 -070041 struct clk *rtc_src_clk;
Ben Dooks1add6782006-07-01 04:36:26 -070042
Chanwoo Choiae05c952014-10-13 15:52:33 -070043 struct s3c_rtc_data *data;
Ben Dooks1add6782006-07-01 04:36:26 -070044
Chanwoo Choi19be09f2014-10-13 15:52:28 -070045 int irq_alarm;
46 int irq_tick;
47
48 spinlock_t pie_lock;
49 spinlock_t alarm_clk_lock;
50
51 int ticnt_save, ticnt_en_save;
52 bool wake_en;
53};
54
Chanwoo Choiae05c952014-10-13 15:52:33 -070055struct s3c_rtc_data {
56 int max_user_freq;
Chanwoo Choidf9e26d2014-10-13 15:52:35 -070057 bool needs_src_clk;
Chanwoo Choiae05c952014-10-13 15:52:33 -070058
59 void (*irq_handler) (struct s3c_rtc *info, int mask);
60 void (*set_freq) (struct s3c_rtc *info, int freq);
61 void (*enable_tick) (struct s3c_rtc *info, struct seq_file *seq);
62 void (*select_tick_clk) (struct s3c_rtc *info);
63 void (*save_tick_cnt) (struct s3c_rtc *info);
64 void (*restore_tick_cnt) (struct s3c_rtc *info);
65 void (*enable) (struct s3c_rtc *info);
66 void (*disable) (struct s3c_rtc *info);
67};
68
Chanwoo Choi24e14552015-04-16 12:45:15 -070069static void s3c_rtc_enable_clk(struct s3c_rtc *info)
Donggeun Kim88cee8f2011-09-14 16:22:19 -070070{
Donggeun Kim88cee8f2011-09-14 16:22:19 -070071 unsigned long irq_flags;
72
Chanwoo Choi19be09f2014-10-13 15:52:28 -070073 spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
Chanwoo Choi24e14552015-04-16 12:45:15 -070074 clk_enable(info->rtc_clk);
75 if (info->data->needs_src_clk)
76 clk_enable(info->rtc_src_clk);
77 spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
78}
79
80static void s3c_rtc_disable_clk(struct s3c_rtc *info)
81{
82 unsigned long irq_flags;
83
84 spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
85 if (info->data->needs_src_clk)
86 clk_disable(info->rtc_src_clk);
87 clk_disable(info->rtc_clk);
Chanwoo Choi19be09f2014-10-13 15:52:28 -070088 spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
Donggeun Kim88cee8f2011-09-14 16:22:19 -070089}
90
Ben Dooks1add6782006-07-01 04:36:26 -070091/* IRQ Handlers */
David Howells7d12e782006-10-05 14:55:46 +010092static irqreturn_t s3c_rtc_tickirq(int irq, void *id)
Ben Dooks1add6782006-07-01 04:36:26 -070093{
Chanwoo Choi19be09f2014-10-13 15:52:28 -070094 struct s3c_rtc *info = (struct s3c_rtc *)id;
Ben Dooks1add6782006-07-01 04:36:26 -070095
Chanwoo Choiae05c952014-10-13 15:52:33 -070096 if (info->data->irq_handler)
97 info->data->irq_handler(info, S3C2410_INTP_TIC);
Atul Dahiya2f3478f2010-07-20 16:02:51 +053098
Chanwoo Choiae05c952014-10-13 15:52:33 -070099 return IRQ_HANDLED;
100}
Atul Dahiya2f3478f2010-07-20 16:02:51 +0530101
Chanwoo Choiae05c952014-10-13 15:52:33 -0700102static irqreturn_t s3c_rtc_alarmirq(int irq, void *id)
103{
104 struct s3c_rtc *info = (struct s3c_rtc *)id;
105
106 if (info->data->irq_handler)
107 info->data->irq_handler(info, S3C2410_INTP_ALM);
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700108
Ben Dooks1add6782006-07-01 04:36:26 -0700109 return IRQ_HANDLED;
110}
111
112/* Update control registers */
Axel Lin2ec38a02011-03-04 17:36:19 -0800113static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
Ben Dooks1add6782006-07-01 04:36:26 -0700114{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700115 struct s3c_rtc *info = dev_get_drvdata(dev);
Ben Dooks1add6782006-07-01 04:36:26 -0700116 unsigned int tmp;
117
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700118 dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
Ben Dooks1add6782006-07-01 04:36:26 -0700119
Chanwoo Choi24e14552015-04-16 12:45:15 -0700120 s3c_rtc_enable_clk(info);
121
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700122 tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN;
Ben Dooks1add6782006-07-01 04:36:26 -0700123
Axel Lin2ec38a02011-03-04 17:36:19 -0800124 if (enabled)
Ben Dooks1add6782006-07-01 04:36:26 -0700125 tmp |= S3C2410_RTCALM_ALMEN;
126
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700127 writeb(tmp, info->base + S3C2410_RTCALM);
Axel Lin2ec38a02011-03-04 17:36:19 -0800128
Chanwoo Choi24e14552015-04-16 12:45:15 -0700129 s3c_rtc_disable_clk(info);
Donggeun Kim88cee8f2011-09-14 16:22:19 -0700130
Axel Lin2ec38a02011-03-04 17:36:19 -0800131 return 0;
Ben Dooks1add6782006-07-01 04:36:26 -0700132}
133
Chanwoo Choiae05c952014-10-13 15:52:33 -0700134/* Set RTC frequency */
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700135static int s3c_rtc_setfreq(struct s3c_rtc *info, int freq)
Ben Dooks1add6782006-07-01 04:36:26 -0700136{
Jonathan Cameron5d2a5032009-01-06 14:42:12 -0800137 if (!is_power_of_2(freq))
138 return -EINVAL;
139
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700140 spin_lock_irq(&info->pie_lock);
Ben Dooks773be7e2008-07-23 21:30:45 -0700141
Chanwoo Choiae05c952014-10-13 15:52:33 -0700142 if (info->data->set_freq)
143 info->data->set_freq(info, freq);
Maurus Cuelenaere9f4123b2010-05-24 14:33:43 -0700144
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700145 spin_unlock_irq(&info->pie_lock);
Ben Dooks773be7e2008-07-23 21:30:45 -0700146
147 return 0;
Ben Dooks1add6782006-07-01 04:36:26 -0700148}
149
150/* Time read/write */
Ben Dooks1add6782006-07-01 04:36:26 -0700151static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
152{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700153 struct s3c_rtc *info = dev_get_drvdata(dev);
Ben Dooks1add6782006-07-01 04:36:26 -0700154 unsigned int have_retried = 0;
155
Chanwoo Choi24e14552015-04-16 12:45:15 -0700156 s3c_rtc_enable_clk(info);
Chanwoo Choidf9e26d2014-10-13 15:52:35 -0700157
Ben Dooks1add6782006-07-01 04:36:26 -0700158 retry_get_time:
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700159 rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN);
160 rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR);
161 rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE);
162 rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON);
163 rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR);
164 rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC);
Ben Dooks1add6782006-07-01 04:36:26 -0700165
Adam Buchbinder48fc7f72012-09-19 21:48:00 -0400166 /* the only way to work out whether the system was mid-update
Ben Dooks1add6782006-07-01 04:36:26 -0700167 * when we read it is to check the second counter, and if it
168 * is zero, then we re-try the entire read
169 */
170
171 if (rtc_tm->tm_sec == 0 && !have_retried) {
172 have_retried = 1;
173 goto retry_get_time;
174 }
175
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700176 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec);
177 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min);
178 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour);
179 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday);
180 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon);
181 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year);
Ben Dooks1add6782006-07-01 04:36:26 -0700182
Chanwoo Choi24e14552015-04-16 12:45:15 -0700183 s3c_rtc_disable_clk(info);
184
Ben Dooks1add6782006-07-01 04:36:26 -0700185 rtc_tm->tm_year += 100;
MyungJoo Ham4e8896c2011-08-25 15:59:22 -0700186
Jingoo Hand4a48c22013-02-21 16:45:06 -0800187 dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n",
MyungJoo Ham4e8896c2011-08-25 15:59:22 -0700188 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
189 rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
190
Ben Dooks1add6782006-07-01 04:36:26 -0700191 rtc_tm->tm_mon -= 1;
192
Kukjin Kim5b3ffdd2010-10-27 15:33:11 -0700193 return rtc_valid_tm(rtc_tm);
Ben Dooks1add6782006-07-01 04:36:26 -0700194}
195
196static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
197{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700198 struct s3c_rtc *info = dev_get_drvdata(dev);
Ben Dooks641741e2006-08-27 01:23:27 -0700199 int year = tm->tm_year - 100;
Ben Dooks1add6782006-07-01 04:36:26 -0700200
Jingoo Hand4a48c22013-02-21 16:45:06 -0800201 dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
Kukjin Kim30ffc402010-10-27 15:33:09 -0700202 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
Ben Dooks9a654512006-08-27 01:23:22 -0700203 tm->tm_hour, tm->tm_min, tm->tm_sec);
204
Ben Dooks641741e2006-08-27 01:23:27 -0700205 /* we get around y2k by simply not supporting it */
206
207 if (year < 0 || year >= 100) {
208 dev_err(dev, "rtc only supports 100 years\n");
209 return -EINVAL;
210 }
211
Chanwoo Choi24e14552015-04-16 12:45:15 -0700212 s3c_rtc_enable_clk(info);
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700213
214 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC);
215 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN);
216 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR);
217 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE);
218 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON);
219 writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR);
220
Chanwoo Choi24e14552015-04-16 12:45:15 -0700221 s3c_rtc_disable_clk(info);
Ben Dooks1add6782006-07-01 04:36:26 -0700222
223 return 0;
224}
225
226static int s3c_rtc_getalarm(struct device *dev, struct rtc_wkalrm *alrm)
227{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700228 struct s3c_rtc *info = dev_get_drvdata(dev);
Ben Dooks1add6782006-07-01 04:36:26 -0700229 struct rtc_time *alm_tm = &alrm->time;
230 unsigned int alm_en;
231
Chanwoo Choi24e14552015-04-16 12:45:15 -0700232 s3c_rtc_enable_clk(info);
Chanwoo Choidf9e26d2014-10-13 15:52:35 -0700233
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700234 alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
235 alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
236 alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR);
237 alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON);
238 alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE);
239 alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR);
Ben Dooks1add6782006-07-01 04:36:26 -0700240
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700241 alm_en = readb(info->base + S3C2410_RTCALM);
Ben Dooks1add6782006-07-01 04:36:26 -0700242
Chanwoo Choi24e14552015-04-16 12:45:15 -0700243 s3c_rtc_disable_clk(info);
244
David Brownella2db8df2006-12-13 00:35:08 -0800245 alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0;
246
Jingoo Hand4a48c22013-02-21 16:45:06 -0800247 dev_dbg(dev, "read alarm %d, %04d.%02d.%02d %02d:%02d:%02d\n",
Ben Dooks1add6782006-07-01 04:36:26 -0700248 alm_en,
Kukjin Kim30ffc402010-10-27 15:33:09 -0700249 1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
Ben Dooks1add6782006-07-01 04:36:26 -0700250 alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
251
Ben Dooks1add6782006-07-01 04:36:26 -0700252 /* decode the alarm enable field */
Ben Dooks1add6782006-07-01 04:36:26 -0700253 if (alm_en & S3C2410_RTCALM_SECEN)
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700254 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
Ben Dooks1add6782006-07-01 04:36:26 -0700255 else
Changhwan Youndd061d12010-10-27 15:33:08 -0700256 alm_tm->tm_sec = -1;
Ben Dooks1add6782006-07-01 04:36:26 -0700257
258 if (alm_en & S3C2410_RTCALM_MINEN)
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700259 alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
Ben Dooks1add6782006-07-01 04:36:26 -0700260 else
Changhwan Youndd061d12010-10-27 15:33:08 -0700261 alm_tm->tm_min = -1;
Ben Dooks1add6782006-07-01 04:36:26 -0700262
263 if (alm_en & S3C2410_RTCALM_HOUREN)
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700264 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour);
Ben Dooks1add6782006-07-01 04:36:26 -0700265 else
Changhwan Youndd061d12010-10-27 15:33:08 -0700266 alm_tm->tm_hour = -1;
Ben Dooks1add6782006-07-01 04:36:26 -0700267
268 if (alm_en & S3C2410_RTCALM_DAYEN)
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700269 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday);
Ben Dooks1add6782006-07-01 04:36:26 -0700270 else
Changhwan Youndd061d12010-10-27 15:33:08 -0700271 alm_tm->tm_mday = -1;
Ben Dooks1add6782006-07-01 04:36:26 -0700272
273 if (alm_en & S3C2410_RTCALM_MONEN) {
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700274 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon);
Ben Dooks1add6782006-07-01 04:36:26 -0700275 alm_tm->tm_mon -= 1;
276 } else {
Changhwan Youndd061d12010-10-27 15:33:08 -0700277 alm_tm->tm_mon = -1;
Ben Dooks1add6782006-07-01 04:36:26 -0700278 }
279
280 if (alm_en & S3C2410_RTCALM_YEAREN)
Adrian Bunkfe20ba72008-10-18 20:28:41 -0700281 alm_tm->tm_year = bcd2bin(alm_tm->tm_year);
Ben Dooks1add6782006-07-01 04:36:26 -0700282 else
Changhwan Youndd061d12010-10-27 15:33:08 -0700283 alm_tm->tm_year = -1;
Ben Dooks1add6782006-07-01 04:36:26 -0700284
285 return 0;
286}
287
288static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
289{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700290 struct s3c_rtc *info = dev_get_drvdata(dev);
Ben Dooks1add6782006-07-01 04:36:26 -0700291 struct rtc_time *tm = &alrm->time;
292 unsigned int alrm_en;
293
Jingoo Hand4a48c22013-02-21 16:45:06 -0800294 dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
Ben Dooks1add6782006-07-01 04:36:26 -0700295 alrm->enabled,
MyungJoo Ham4e8896c2011-08-25 15:59:22 -0700296 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
Kukjin Kim30ffc402010-10-27 15:33:09 -0700297 tm->tm_hour, tm->tm_min, tm->tm_sec);
Ben Dooks1add6782006-07-01 04:36:26 -0700298
Chanwoo Choi24e14552015-04-16 12:45:15 -0700299 s3c_rtc_enable_clk(info);
300
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700301 alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN;
302 writeb(0x00, info->base + S3C2410_RTCALM);
Ben Dooks1add6782006-07-01 04:36:26 -0700303
304 if (tm->tm_sec < 60 && tm->tm_sec >= 0) {
305 alrm_en |= S3C2410_RTCALM_SECEN;
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700306 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC);
Ben Dooks1add6782006-07-01 04:36:26 -0700307 }
308
309 if (tm->tm_min < 60 && tm->tm_min >= 0) {
310 alrm_en |= S3C2410_RTCALM_MINEN;
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700311 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN);
Ben Dooks1add6782006-07-01 04:36:26 -0700312 }
313
314 if (tm->tm_hour < 24 && tm->tm_hour >= 0) {
315 alrm_en |= S3C2410_RTCALM_HOUREN;
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700316 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR);
Ben Dooks1add6782006-07-01 04:36:26 -0700317 }
318
Jingoo Hand4a48c22013-02-21 16:45:06 -0800319 dev_dbg(dev, "setting S3C2410_RTCALM to %08x\n", alrm_en);
Ben Dooks1add6782006-07-01 04:36:26 -0700320
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700321 writeb(alrm_en, info->base + S3C2410_RTCALM);
Ben Dooks1add6782006-07-01 04:36:26 -0700322
Chanwoo Choi24e14552015-04-16 12:45:15 -0700323 s3c_rtc_disable_clk(info);
Ben Dooks1add6782006-07-01 04:36:26 -0700324
Chanwoo Choi24e14552015-04-16 12:45:15 -0700325 s3c_rtc_setaie(dev, alrm->enabled);
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700326
Ben Dooks1add6782006-07-01 04:36:26 -0700327 return 0;
328}
329
Ben Dooks1add6782006-07-01 04:36:26 -0700330static int s3c_rtc_proc(struct device *dev, struct seq_file *seq)
331{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700332 struct s3c_rtc *info = dev_get_drvdata(dev);
Ben Dooks1add6782006-07-01 04:36:26 -0700333
Chanwoo Choi24e14552015-04-16 12:45:15 -0700334 s3c_rtc_enable_clk(info);
Maurus Cuelenaere9f4123b2010-05-24 14:33:43 -0700335
Chanwoo Choiae05c952014-10-13 15:52:33 -0700336 if (info->data->enable_tick)
337 info->data->enable_tick(info, seq);
338
Chanwoo Choi24e14552015-04-16 12:45:15 -0700339 s3c_rtc_disable_clk(info);
Chanwoo Choiae05c952014-10-13 15:52:33 -0700340
Ben Dooks1add6782006-07-01 04:36:26 -0700341 return 0;
342}
343
David Brownellff8371a2006-09-30 23:28:17 -0700344static const struct rtc_class_ops s3c_rtcops = {
Ben Dooks1add6782006-07-01 04:36:26 -0700345 .read_time = s3c_rtc_gettime,
346 .set_time = s3c_rtc_settime,
347 .read_alarm = s3c_rtc_getalarm,
348 .set_alarm = s3c_rtc_setalarm,
Changhwan Youne6eb5242010-10-27 15:33:09 -0700349 .proc = s3c_rtc_proc,
350 .alarm_irq_enable = s3c_rtc_setaie,
Ben Dooks1add6782006-07-01 04:36:26 -0700351};
352
Chanwoo Choiae05c952014-10-13 15:52:33 -0700353static void s3c24xx_rtc_enable(struct s3c_rtc *info)
Ben Dooks1add6782006-07-01 04:36:26 -0700354{
Chanwoo Choid67288d2014-10-13 15:52:31 -0700355 unsigned int con, tmp;
Ben Dooks1add6782006-07-01 04:36:26 -0700356
Chanwoo Choid67288d2014-10-13 15:52:31 -0700357 con = readw(info->base + S3C2410_RTCCON);
Chanwoo Choiae05c952014-10-13 15:52:33 -0700358 /* re-enable the device, and check it is ok */
359 if ((con & S3C2410_RTCCON_RTCEN) == 0) {
360 dev_info(info->dev, "rtc disabled, re-enabling\n");
Ben Dooks1add6782006-07-01 04:36:26 -0700361
Chanwoo Choiae05c952014-10-13 15:52:33 -0700362 tmp = readw(info->base + S3C2410_RTCCON);
363 writew(tmp | S3C2410_RTCCON_RTCEN,
364 info->base + S3C2410_RTCCON);
Ben Dooks1add6782006-07-01 04:36:26 -0700365 }
Chanwoo Choiae05c952014-10-13 15:52:33 -0700366
367 if (con & S3C2410_RTCCON_CNTSEL) {
368 dev_info(info->dev, "removing RTCCON_CNTSEL\n");
369
370 tmp = readw(info->base + S3C2410_RTCCON);
371 writew(tmp & ~S3C2410_RTCCON_CNTSEL,
372 info->base + S3C2410_RTCCON);
373 }
374
375 if (con & S3C2410_RTCCON_CLKRST) {
376 dev_info(info->dev, "removing RTCCON_CLKRST\n");
377
378 tmp = readw(info->base + S3C2410_RTCCON);
379 writew(tmp & ~S3C2410_RTCCON_CLKRST,
380 info->base + S3C2410_RTCCON);
381 }
Chanwoo Choiae05c952014-10-13 15:52:33 -0700382}
383
384static void s3c24xx_rtc_disable(struct s3c_rtc *info)
385{
386 unsigned int con;
387
Chanwoo Choiae05c952014-10-13 15:52:33 -0700388 con = readw(info->base + S3C2410_RTCCON);
389 con &= ~S3C2410_RTCCON_RTCEN;
390 writew(con, info->base + S3C2410_RTCCON);
391
392 con = readb(info->base + S3C2410_TICNT);
393 con &= ~S3C2410_TICNT_ENABLE;
394 writeb(con, info->base + S3C2410_TICNT);
Chanwoo Choiae05c952014-10-13 15:52:33 -0700395}
396
397static void s3c6410_rtc_disable(struct s3c_rtc *info)
398{
399 unsigned int con;
400
Chanwoo Choiae05c952014-10-13 15:52:33 -0700401 con = readw(info->base + S3C2410_RTCCON);
402 con &= ~S3C64XX_RTCCON_TICEN;
403 con &= ~S3C2410_RTCCON_RTCEN;
404 writew(con, info->base + S3C2410_RTCCON);
Ben Dooks1add6782006-07-01 04:36:26 -0700405}
406
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700407static int s3c_rtc_remove(struct platform_device *pdev)
Ben Dooks1add6782006-07-01 04:36:26 -0700408{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700409 struct s3c_rtc *info = platform_get_drvdata(pdev);
Ben Dooks1add6782006-07-01 04:36:26 -0700410
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700411 s3c_rtc_setaie(info->dev, 0);
412
413 clk_unprepare(info->rtc_clk);
414 info->rtc_clk = NULL;
Atul Dahiyae48add82010-07-20 12:19:14 +0530415
Ben Dooks1add6782006-07-01 04:36:26 -0700416 return 0;
417}
418
Heiko Stuebnerd2524ca2011-12-24 10:52:14 +0900419static const struct of_device_id s3c_rtc_dt_match[];
420
Chanwoo Choiae05c952014-10-13 15:52:33 -0700421static struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev)
Heiko Stuebnerd2524ca2011-12-24 10:52:14 +0900422{
Chanwoo Choiae05c952014-10-13 15:52:33 -0700423 const struct of_device_id *match;
Chanwoo Choid67288d2014-10-13 15:52:31 -0700424
Chanwoo Choiae05c952014-10-13 15:52:33 -0700425 match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
426 return (struct s3c_rtc_data *)match->data;
Heiko Stuebnerd2524ca2011-12-24 10:52:14 +0900427}
428
Greg Kroah-Hartman5a167f42012-12-21 13:09:38 -0800429static int s3c_rtc_probe(struct platform_device *pdev)
Ben Dooks1add6782006-07-01 04:36:26 -0700430{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700431 struct s3c_rtc *info = NULL;
Changhwan Youne1df9622010-10-27 15:33:10 -0700432 struct rtc_time rtc_tm;
Ben Dooks1add6782006-07-01 04:36:26 -0700433 struct resource *res;
434 int ret;
435
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700436 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
437 if (!info)
438 return -ENOMEM;
Ben Dooks1add6782006-07-01 04:36:26 -0700439
440 /* find the IRQs */
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700441 info->irq_tick = platform_get_irq(pdev, 1);
442 if (info->irq_tick < 0) {
Ben Dooks1add6782006-07-01 04:36:26 -0700443 dev_err(&pdev->dev, "no irq for rtc tick\n");
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700444 return info->irq_tick;
Ben Dooks1add6782006-07-01 04:36:26 -0700445 }
446
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700447 info->dev = &pdev->dev;
Chanwoo Choiae05c952014-10-13 15:52:33 -0700448 info->data = s3c_rtc_get_data(pdev);
449 if (!info->data) {
450 dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
451 return -EINVAL;
452 }
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700453 spin_lock_init(&info->pie_lock);
454 spin_lock_init(&info->alarm_clk_lock);
455
456 platform_set_drvdata(pdev, info);
457
458 info->irq_alarm = platform_get_irq(pdev, 0);
459 if (info->irq_alarm < 0) {
Ben Dooks1add6782006-07-01 04:36:26 -0700460 dev_err(&pdev->dev, "no irq for alarm\n");
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700461 return info->irq_alarm;
Ben Dooks1add6782006-07-01 04:36:26 -0700462 }
463
Jingoo Hand4a48c22013-02-21 16:45:06 -0800464 dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n",
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700465 info->irq_tick, info->irq_alarm);
Ben Dooks1add6782006-07-01 04:36:26 -0700466
467 /* get the memory region */
Ben Dooks1add6782006-07-01 04:36:26 -0700468 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700469 info->base = devm_ioremap_resource(&pdev->dev, res);
470 if (IS_ERR(info->base))
471 return PTR_ERR(info->base);
Ben Dooks1add6782006-07-01 04:36:26 -0700472
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700473 info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
474 if (IS_ERR(info->rtc_clk)) {
Chanwoo Choidf9e26d2014-10-13 15:52:35 -0700475 dev_err(&pdev->dev, "failed to find rtc clock\n");
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700476 return PTR_ERR(info->rtc_clk);
Atul Dahiyae48add82010-07-20 12:19:14 +0530477 }
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700478 clk_prepare_enable(info->rtc_clk);
Atul Dahiyae48add82010-07-20 12:19:14 +0530479
Marek Szyprowskieaf3a652014-10-29 14:50:38 -0700480 if (info->data->needs_src_clk) {
481 info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
482 if (IS_ERR(info->rtc_src_clk)) {
483 dev_err(&pdev->dev,
484 "failed to find rtc source clock\n");
485 return PTR_ERR(info->rtc_src_clk);
486 }
487 clk_prepare_enable(info->rtc_src_clk);
Chanwoo Choidf9e26d2014-10-13 15:52:35 -0700488 }
Chanwoo Choidf9e26d2014-10-13 15:52:35 -0700489
Ben Dooks1add6782006-07-01 04:36:26 -0700490 /* check to see if everything is setup correctly */
Chanwoo Choiae05c952014-10-13 15:52:33 -0700491 if (info->data->enable)
492 info->data->enable(info);
Ben Dooks1add6782006-07-01 04:36:26 -0700493
Jingoo Hand4a48c22013-02-21 16:45:06 -0800494 dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n",
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700495 readw(info->base + S3C2410_RTCCON));
Ben Dooks1add6782006-07-01 04:36:26 -0700496
Yauhen Kharuzhy51b76162008-10-29 14:01:16 -0700497 device_init_wakeup(&pdev->dev, 1);
498
Krzysztof Kozlowski202fe4c2015-04-16 12:45:57 -0700499 /* Check RTC Time */
Krzysztof Kozlowski492da682015-04-16 12:46:08 -0700500 if (s3c_rtc_gettime(&pdev->dev, &rtc_tm)) {
Krzysztof Kozlowski202fe4c2015-04-16 12:45:57 -0700501 rtc_tm.tm_year = 100;
502 rtc_tm.tm_mon = 0;
503 rtc_tm.tm_mday = 1;
504 rtc_tm.tm_hour = 0;
505 rtc_tm.tm_min = 0;
506 rtc_tm.tm_sec = 0;
507
508 s3c_rtc_settime(&pdev->dev, &rtc_tm);
509
510 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
511 }
512
Ben Dooks1add6782006-07-01 04:36:26 -0700513 /* register RTC and exit */
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700514 info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
Ben Dooks1add6782006-07-01 04:36:26 -0700515 THIS_MODULE);
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700516 if (IS_ERR(info->rtc)) {
Ben Dooks1add6782006-07-01 04:36:26 -0700517 dev_err(&pdev->dev, "cannot attach rtc\n");
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700518 ret = PTR_ERR(info->rtc);
Ben Dooks1add6782006-07-01 04:36:26 -0700519 goto err_nortc;
520 }
521
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700522 ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq,
523 0, "s3c2410-rtc alarm", info);
524 if (ret) {
525 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret);
526 goto err_nortc;
527 }
528
529 ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq,
530 0, "s3c2410-rtc tick", info);
531 if (ret) {
532 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret);
533 goto err_nortc;
534 }
Maurus Cuelenaereeaa6e4d2010-06-04 14:14:46 -0700535
Chanwoo Choiae05c952014-10-13 15:52:33 -0700536 if (info->data->select_tick_clk)
537 info->data->select_tick_clk(info);
Heiko Stuebner25c1a242011-12-24 10:52:19 +0900538
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700539 s3c_rtc_setfreq(info, 1);
Maurus Cuelenaeree893de52010-06-04 14:14:44 -0700540
Chanwoo Choi24e14552015-04-16 12:45:15 -0700541 s3c_rtc_disable_clk(info);
Donggeun Kimcefe4fb2011-07-25 17:13:32 -0700542
Ben Dooks1add6782006-07-01 04:36:26 -0700543 return 0;
544
545 err_nortc:
Chanwoo Choiae05c952014-10-13 15:52:33 -0700546 if (info->data->disable)
547 info->data->disable(info);
Chanwoo Choi24e14552015-04-16 12:45:15 -0700548
549 if (info->data->needs_src_clk)
550 clk_disable_unprepare(info->rtc_src_clk);
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700551 clk_disable_unprepare(info->rtc_clk);
Atul Dahiyae48add82010-07-20 12:19:14 +0530552
Ben Dooks1add6782006-07-01 04:36:26 -0700553 return ret;
554}
555
Jingoo Han32e445a2013-04-29 16:19:27 -0700556#ifdef CONFIG_PM_SLEEP
Ben Dooks1add6782006-07-01 04:36:26 -0700557
Jingoo Han32e445a2013-04-29 16:19:27 -0700558static int s3c_rtc_suspend(struct device *dev)
Ben Dooks1add6782006-07-01 04:36:26 -0700559{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700560 struct s3c_rtc *info = dev_get_drvdata(dev);
Jingoo Han32e445a2013-04-29 16:19:27 -0700561
Chanwoo Choi24e14552015-04-16 12:45:15 -0700562 s3c_rtc_enable_clk(info);
Chanwoo Choiae05c952014-10-13 15:52:33 -0700563
Ben Dooks1add6782006-07-01 04:36:26 -0700564 /* save TICNT for anyone using periodic interrupts */
Chanwoo Choiae05c952014-10-13 15:52:33 -0700565 if (info->data->save_tick_cnt)
566 info->data->save_tick_cnt(info);
567
568 if (info->data->disable)
569 info->data->disable(info);
Vladimir Zapolskiyf501ed52010-09-22 13:05:13 -0700570
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700571 if (device_may_wakeup(dev) && !info->wake_en) {
572 if (enable_irq_wake(info->irq_alarm) == 0)
573 info->wake_en = true;
Ben Dooks52cd4e52011-05-11 15:13:28 -0700574 else
Jingoo Han32e445a2013-04-29 16:19:27 -0700575 dev_err(dev, "enable_irq_wake failed\n");
Ben Dooks52cd4e52011-05-11 15:13:28 -0700576 }
Chanwoo Choiae05c952014-10-13 15:52:33 -0700577
Ben Dooks1add6782006-07-01 04:36:26 -0700578 return 0;
579}
580
Jingoo Han32e445a2013-04-29 16:19:27 -0700581static int s3c_rtc_resume(struct device *dev)
Ben Dooks1add6782006-07-01 04:36:26 -0700582{
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700583 struct s3c_rtc *info = dev_get_drvdata(dev);
Maurus Cuelenaere9f4123b2010-05-24 14:33:43 -0700584
Chanwoo Choiae05c952014-10-13 15:52:33 -0700585 if (info->data->enable)
586 info->data->enable(info);
587
588 if (info->data->restore_tick_cnt)
589 info->data->restore_tick_cnt(info);
Vladimir Zapolskiyf501ed52010-09-22 13:05:13 -0700590
Chanwoo Choi24e14552015-04-16 12:45:15 -0700591 s3c_rtc_disable_clk(info);
592
Chanwoo Choi19be09f2014-10-13 15:52:28 -0700593 if (device_may_wakeup(dev) && info->wake_en) {
594 disable_irq_wake(info->irq_alarm);
595 info->wake_en = false;
Ben Dooks52cd4e52011-05-11 15:13:28 -0700596 }
Chanwoo Choiae05c952014-10-13 15:52:33 -0700597
Ben Dooks1add6782006-07-01 04:36:26 -0700598 return 0;
599}
Ben Dooks1add6782006-07-01 04:36:26 -0700600#endif
Jingoo Han32e445a2013-04-29 16:19:27 -0700601static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
602
Chanwoo Choiae05c952014-10-13 15:52:33 -0700603static void s3c24xx_rtc_irq(struct s3c_rtc *info, int mask)
604{
Chanwoo Choiae05c952014-10-13 15:52:33 -0700605 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
Chanwoo Choiae05c952014-10-13 15:52:33 -0700606}
607
608static void s3c6410_rtc_irq(struct s3c_rtc *info, int mask)
609{
Chanwoo Choiae05c952014-10-13 15:52:33 -0700610 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF);
611 writeb(mask, info->base + S3C2410_INTP);
Chanwoo Choiae05c952014-10-13 15:52:33 -0700612}
613
614static void s3c2410_rtc_setfreq(struct s3c_rtc *info, int freq)
615{
616 unsigned int tmp = 0;
617 int val;
618
619 tmp = readb(info->base + S3C2410_TICNT);
620 tmp &= S3C2410_TICNT_ENABLE;
621
622 val = (info->rtc->max_user_freq / freq) - 1;
623 tmp |= val;
624
625 writel(tmp, info->base + S3C2410_TICNT);
626}
627
628static void s3c2416_rtc_setfreq(struct s3c_rtc *info, int freq)
629{
630 unsigned int tmp = 0;
631 int val;
632
633 tmp = readb(info->base + S3C2410_TICNT);
634 tmp &= S3C2410_TICNT_ENABLE;
635
636 val = (info->rtc->max_user_freq / freq) - 1;
637
638 tmp |= S3C2443_TICNT_PART(val);
639 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
640
641 writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2);
642
643 writel(tmp, info->base + S3C2410_TICNT);
644}
645
646static void s3c2443_rtc_setfreq(struct s3c_rtc *info, int freq)
647{
648 unsigned int tmp = 0;
649 int val;
650
651 tmp = readb(info->base + S3C2410_TICNT);
652 tmp &= S3C2410_TICNT_ENABLE;
653
654 val = (info->rtc->max_user_freq / freq) - 1;
655
656 tmp |= S3C2443_TICNT_PART(val);
657 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1);
658
659 writel(tmp, info->base + S3C2410_TICNT);
660}
661
662static void s3c6410_rtc_setfreq(struct s3c_rtc *info, int freq)
663{
664 int val;
665
666 val = (info->rtc->max_user_freq / freq) - 1;
667 writel(val, info->base + S3C2410_TICNT);
668}
669
670static void s3c24xx_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
671{
672 unsigned int ticnt;
673
674 ticnt = readb(info->base + S3C2410_TICNT);
675 ticnt &= S3C2410_TICNT_ENABLE;
676
677 seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
678}
679
680static void s3c2416_rtc_select_tick_clk(struct s3c_rtc *info)
681{
682 unsigned int con;
683
684 con = readw(info->base + S3C2410_RTCCON);
685 con |= S3C2443_RTCCON_TICSEL;
686 writew(con, info->base + S3C2410_RTCCON);
687}
688
689static void s3c6410_rtc_enable_tick(struct s3c_rtc *info, struct seq_file *seq)
690{
691 unsigned int ticnt;
692
693 ticnt = readw(info->base + S3C2410_RTCCON);
694 ticnt &= S3C64XX_RTCCON_TICEN;
695
696 seq_printf(seq, "periodic_IRQ\t: %s\n", ticnt ? "yes" : "no");
697}
698
699static void s3c24xx_rtc_save_tick_cnt(struct s3c_rtc *info)
700{
701 info->ticnt_save = readb(info->base + S3C2410_TICNT);
702}
703
704static void s3c24xx_rtc_restore_tick_cnt(struct s3c_rtc *info)
705{
706 writeb(info->ticnt_save, info->base + S3C2410_TICNT);
707}
708
709static void s3c6410_rtc_save_tick_cnt(struct s3c_rtc *info)
710{
711 info->ticnt_en_save = readw(info->base + S3C2410_RTCCON);
712 info->ticnt_en_save &= S3C64XX_RTCCON_TICEN;
713 info->ticnt_save = readl(info->base + S3C2410_TICNT);
714}
715
716static void s3c6410_rtc_restore_tick_cnt(struct s3c_rtc *info)
717{
718 unsigned int con;
719
720 writel(info->ticnt_save, info->base + S3C2410_TICNT);
721 if (info->ticnt_en_save) {
722 con = readw(info->base + S3C2410_RTCCON);
723 writew(con | info->ticnt_en_save,
724 info->base + S3C2410_RTCCON);
725 }
726}
727
728static struct s3c_rtc_data const s3c2410_rtc_data = {
729 .max_user_freq = 128,
730 .irq_handler = s3c24xx_rtc_irq,
731 .set_freq = s3c2410_rtc_setfreq,
732 .enable_tick = s3c24xx_rtc_enable_tick,
733 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
734 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
735 .enable = s3c24xx_rtc_enable,
736 .disable = s3c24xx_rtc_disable,
737};
738
739static struct s3c_rtc_data const s3c2416_rtc_data = {
740 .max_user_freq = 32768,
741 .irq_handler = s3c24xx_rtc_irq,
742 .set_freq = s3c2416_rtc_setfreq,
743 .enable_tick = s3c24xx_rtc_enable_tick,
744 .select_tick_clk = s3c2416_rtc_select_tick_clk,
745 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
746 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
747 .enable = s3c24xx_rtc_enable,
748 .disable = s3c24xx_rtc_disable,
749};
750
751static struct s3c_rtc_data const s3c2443_rtc_data = {
752 .max_user_freq = 32768,
753 .irq_handler = s3c24xx_rtc_irq,
754 .set_freq = s3c2443_rtc_setfreq,
755 .enable_tick = s3c24xx_rtc_enable_tick,
756 .select_tick_clk = s3c2416_rtc_select_tick_clk,
757 .save_tick_cnt = s3c24xx_rtc_save_tick_cnt,
758 .restore_tick_cnt = s3c24xx_rtc_restore_tick_cnt,
759 .enable = s3c24xx_rtc_enable,
760 .disable = s3c24xx_rtc_disable,
761};
762
763static struct s3c_rtc_data const s3c6410_rtc_data = {
764 .max_user_freq = 32768,
Javier Martinez Canillas8792f7772015-03-12 16:25:49 -0700765 .needs_src_clk = true,
Chanwoo Choiae05c952014-10-13 15:52:33 -0700766 .irq_handler = s3c6410_rtc_irq,
767 .set_freq = s3c6410_rtc_setfreq,
768 .enable_tick = s3c6410_rtc_enable_tick,
769 .save_tick_cnt = s3c6410_rtc_save_tick_cnt,
770 .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt,
771 .enable = s3c24xx_rtc_enable,
772 .disable = s3c6410_rtc_disable,
Tushar Beherac3cba922012-04-12 12:49:14 -0700773};
774
Chanwoo Choidf9e26d2014-10-13 15:52:35 -0700775static struct s3c_rtc_data const exynos3250_rtc_data = {
776 .max_user_freq = 32768,
777 .needs_src_clk = true,
778 .irq_handler = s3c6410_rtc_irq,
779 .set_freq = s3c6410_rtc_setfreq,
780 .enable_tick = s3c6410_rtc_enable_tick,
781 .save_tick_cnt = s3c6410_rtc_save_tick_cnt,
782 .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt,
783 .enable = s3c24xx_rtc_enable,
784 .disable = s3c6410_rtc_disable,
785};
786
Thomas Abraham39ce4082011-10-24 14:49:04 +0200787static const struct of_device_id s3c_rtc_dt_match[] = {
Heiko Stuebnerd2524ca2011-12-24 10:52:14 +0900788 {
Tushar Beheracd1e6f92012-04-12 12:49:14 -0700789 .compatible = "samsung,s3c2410-rtc",
Chanwoo Choiae05c952014-10-13 15:52:33 -0700790 .data = (void *)&s3c2410_rtc_data,
Heiko Stuebnerd2524ca2011-12-24 10:52:14 +0900791 }, {
Tushar Beheracd1e6f92012-04-12 12:49:14 -0700792 .compatible = "samsung,s3c2416-rtc",
Chanwoo Choiae05c952014-10-13 15:52:33 -0700793 .data = (void *)&s3c2416_rtc_data,
Heiko Stuebner25c1a242011-12-24 10:52:19 +0900794 }, {
Tushar Beheracd1e6f92012-04-12 12:49:14 -0700795 .compatible = "samsung,s3c2443-rtc",
Chanwoo Choiae05c952014-10-13 15:52:33 -0700796 .data = (void *)&s3c2443_rtc_data,
Heiko Stuebner25c1a242011-12-24 10:52:19 +0900797 }, {
Tushar Beheracd1e6f92012-04-12 12:49:14 -0700798 .compatible = "samsung,s3c6410-rtc",
Chanwoo Choiae05c952014-10-13 15:52:33 -0700799 .data = (void *)&s3c6410_rtc_data,
Chanwoo Choidf9e26d2014-10-13 15:52:35 -0700800 }, {
801 .compatible = "samsung,exynos3250-rtc",
802 .data = (void *)&exynos3250_rtc_data,
Heiko Stuebnerd2524ca2011-12-24 10:52:14 +0900803 },
Chanwoo Choiae05c952014-10-13 15:52:33 -0700804 { /* sentinel */ },
Thomas Abraham39ce4082011-10-24 14:49:04 +0200805};
806MODULE_DEVICE_TABLE(of, s3c_rtc_dt_match);
Maurus Cuelenaere9f4123b2010-05-24 14:33:43 -0700807
808static struct platform_driver s3c_rtc_driver = {
Ben Dooks1add6782006-07-01 04:36:26 -0700809 .probe = s3c_rtc_probe,
Greg Kroah-Hartman5a167f42012-12-21 13:09:38 -0800810 .remove = s3c_rtc_remove,
Ben Dooks1add6782006-07-01 04:36:26 -0700811 .driver = {
Maurus Cuelenaere9f4123b2010-05-24 14:33:43 -0700812 .name = "s3c-rtc",
Jingoo Han32e445a2013-04-29 16:19:27 -0700813 .pm = &s3c_rtc_pm_ops,
Sachin Kamat04a373f2012-12-17 16:02:52 -0800814 .of_match_table = of_match_ptr(s3c_rtc_dt_match),
Ben Dooks1add6782006-07-01 04:36:26 -0700815 },
816};
Axel Lin0c4eae62012-01-10 15:10:48 -0800817module_platform_driver(s3c_rtc_driver);
Ben Dooks1add6782006-07-01 04:36:26 -0700818
819MODULE_DESCRIPTION("Samsung S3C RTC Driver");
820MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
821MODULE_LICENSE("GPL");
Kay Sieversad28a072008-04-10 21:29:25 -0700822MODULE_ALIAS("platform:s3c2410-rtc");