drivers/rtc/rtc-HYM8563.c

   1 /* drivers/rtc/rtc-HYM8563.c - driver for HYM8563
   2  *
   3  * Copyright (C) 2010 ROCKCHIP, Inc.
   4  *
   5  * This software is licensed under the terms of the GNU General Public
   6  * License version 2, as published by the Free Software Foundation, and
   7  * may be copied, distributed, and modified under those terms.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 //#define DEBUG
  16 #define pr_fmt(fmt) "rtc: %s: " fmt, __func__
  17
  18 #include <linux/module.h>
  19 #include <linux/i2c.h>
  20 #include <linux/bcd.h>
  21 #include <linux/rtc.h>
  22 #include <linux/delay.h>
  23 #include <linux/wakelock.h>
  24 #include <linux/slab.h>
  25 #include "rtc-HYM8563.h"
  26 #include <linux/of_gpio.h>
  27 #include <linux/irqdomain.h>
  28 #define RTC_SPEED       200 * 1000
  29
  30 struct hym8563 {
  31         int irq;
  32         struct i2c_client *client;
  33         struct mutex mutex;
  34         struct rtc_device *rtc;
  35         struct rtc_wkalrm alarm;
  36         struct wake_lock wake_lock;
  37 };
  38 static struct i2c_client *gClient = NULL;
  39
  40 static int i2c_master_reg8_send(const struct i2c_client *client, const char reg, const char *buf, int count, int scl_rate)
  41 {
  42         struct i2c_adapter *adap=client->adapter;
  43         struct i2c_msg msg;
  44         int ret;
  45         char *tx_buf = (char *)kzalloc(count + 1, GFP_KERNEL);
  46         if(!tx_buf)
  47                 return -ENOMEM;
  48         tx_buf[0] = reg;
  49         memcpy(tx_buf+1, buf, count);
  50
  51         msg.addr = client->addr;
  52         msg.flags = client->flags;
  53         msg.len = count + 1;
  54         msg.buf = (char *)tx_buf;
  55         msg.scl_rate = scl_rate;
  56
  57         ret = i2c_transfer(adap, &msg, 1);
  58         kfree(tx_buf);
  59         return (ret == 1) ? count : ret;
  60
  61 }
  62
  63 static int i2c_master_reg8_recv(const struct i2c_client *client, const char reg, char *buf, int count, int scl_rate)
  64 {
  65         struct i2c_adapter *adap=client->adapter;
  66         struct i2c_msg msgs[2];
  67         int ret;
  68         char reg_buf = reg;
  69
  70         msgs[0].addr = client->addr;
  71         msgs[0].flags = client->flags;
  72         msgs[0].len = 1;
  73         msgs[0].buf = &reg_buf;
  74         msgs[0].scl_rate = scl_rate;
  75
  76         msgs[1].addr = client->addr;
  77         msgs[1].flags = client->flags | I2C_M_RD;
  78         msgs[1].len = count;
  79         msgs[1].buf = (char *)buf;
  80         msgs[1].scl_rate = scl_rate;
  81
  82         ret = i2c_transfer(adap, msgs, 2);
  83
  84         return (ret == 2)? count : ret;
  85 }
  86
  87
  88
  89 static int hym8563_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[], unsigned len)
  90 {
  91         int ret;
  92         ret = i2c_master_reg8_recv(client, reg, buf, len, RTC_SPEED);
  93         return ret;
  94 }
  95
  96 static int hym8563_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[], __u16 len)
  97 {
  98         int ret;
  99         ret = i2c_master_reg8_send(client, reg, buf, (int)len, RTC_SPEED);
 100         return ret;
 101 }
 102
 103
 104 int hym8563_enable_count(struct i2c_client *client, int en)
 105 {
 106         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 107         u8 regs[2];
 108
 109         if (!hym8563)
 110                 return -1;
 111
 112         if (en) {
 113                 hym8563_i2c_read_regs(client, RTC_CTL2, regs, 1);
 114                 regs[0] |= TIE;
 115                 hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
 116                 regs[0] = 0;
 117                 regs[0] |= (TE | TD1);
 118                 hym8563_i2c_set_regs(client, RTC_T_CTL, regs, 1);
 119         }
 120         else {
 121                 hym8563_i2c_read_regs(client, RTC_CTL2, regs, 1);
 122                 regs[0] &= ~TIE;
 123                 hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
 124                 regs[0] = 0;
 125                 regs[0] |= (TD0 | TD1);
 126                 hym8563_i2c_set_regs(client, RTC_T_CTL, regs, 1);
 127         }
 128         return 0;
 129 }
 130
 131 //0 < sec <=255
 132 int hym8563_set_count(struct i2c_client *client, int sec)
 133 {
 134         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 135         u8 regs[2];
 136
 137         if (!hym8563)
 138                 return -1;
 139
 140         if (sec >= 255)
 141                 regs[0] = 255;
 142         else if (sec <= 1)
 143                 regs[0] = 1;
 144         else
 145                 regs[0] = sec;
 146
 147         hym8563_i2c_set_regs(client, RTC_T_COUNT, regs, 1);
 148
 149         return 0;
 150 }
 151
 152
 153 /*the init of the hym8563 at first time */
 154 static int hym8563_init_device(struct i2c_client *client)
 155 {
 156         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 157         u8 regs[2];
 158         int sr;
 159
 160         mutex_lock(&hym8563->mutex);
 161         regs[0]=0;
 162         sr = hym8563_i2c_set_regs(client, RTC_CTL1, regs, 1);
 163         if (sr < 0)
 164                 goto exit;
 165
 166         //disable clkout
 167         regs[0] = 0x80;
 168         sr = hym8563_i2c_set_regs(client, RTC_CLKOUT, regs, 1);
 169         if (sr < 0)
 170                 goto exit;
 171
 172         /*enable alarm && count interrupt*/
 173         sr = hym8563_i2c_read_regs(client, RTC_CTL2, regs, 1);
 174         if (sr < 0)
 175                 goto exit;
 176         regs[0] = 0x0;
 177         regs[0] |= (AIE | TIE);
 178         sr = hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
 179         if (sr < 0)
 180                 goto exit;
 181         sr = hym8563_i2c_read_regs(client, RTC_CTL2, regs, 1);
 182         if (sr < 0)
 183                 goto exit;
 184
 185         sr = hym8563_i2c_read_regs(client, RTC_CTL2, regs, 1);
 186         if (sr < 0) {
 187                 pr_err("read CTL2 err\n");
 188                 goto exit;
 189         }
 190
 191         if(regs[0] & (AF|TF))
 192         {
 193                 regs[0] &= ~(AF|TF);
 194                 sr = hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
 195         }
 196
 197 exit:
 198         mutex_unlock(&hym8563->mutex);
 199
 200         return sr;
 201 }
 202
 203 static int hym8563_read_datetime(struct i2c_client *client, struct rtc_time *tm)
 204 {
 205         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 206         u8 regs[HYM8563_RTC_SECTION_LEN] = { 0, };
 207         mutex_lock(&hym8563->mutex);
 208 //      for (i = 0; i < HYM8563_RTC_SECTION_LEN; i++) {
 209 //              hym8563_i2c_read_regs(client, RTC_SEC+i, &regs[i], 1);
 210 //      }
 211         hym8563_i2c_read_regs(client, RTC_SEC, regs, HYM8563_RTC_SECTION_LEN);
 212
 213         mutex_unlock(&hym8563->mutex);
 214
 215         tm->tm_sec = bcd2bin(regs[0x00] & 0x7F);
 216         tm->tm_min = bcd2bin(regs[0x01] & 0x7F);
 217         tm->tm_hour = bcd2bin(regs[0x02] & 0x3F);
 218         tm->tm_mday = bcd2bin(regs[0x03] & 0x3F);
 219         tm->tm_wday = bcd2bin(regs[0x04] & 0x07);
 220
 221         tm->tm_mon = bcd2bin(regs[0x05] & 0x1F) ;
 222         tm->tm_mon -= 1;                        //inorder to cooperate the systerm time
 223
 224         tm->tm_year = bcd2bin(regs[0x06] & 0xFF);
 225         if(regs[5] & 0x80)
 226                 tm->tm_year += 1900;
 227         else
 228                 tm->tm_year += 2000;
 229
 230         tm->tm_year -= 1900;                    //inorder to cooperate the systerm time
 231         if(tm->tm_year < 0)
 232                 tm->tm_year = 0;
 233         tm->tm_isdst = 0;
 234
 235         pr_debug("%4d-%02d-%02d(%d) %02d:%02d:%02d\n",
 236                 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_wday,
 237                 tm->tm_hour, tm->tm_min, tm->tm_sec);
 238
 239         return 0;
 240 }
 241
 242 static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
 243 {
 244         return hym8563_read_datetime(to_i2c_client(dev), tm);
 245 }
 246
 247 static int hym8563_set_time(struct i2c_client *client, struct rtc_time *tm)
 248 {
 249         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 250         u8 regs[HYM8563_RTC_SECTION_LEN] = { 0, };
 251         u8 mon_day;
 252         //u8 ret = 0;
 253
 254         pr_debug("%4d-%02d-%02d(%d) %02d:%02d:%02d\n",
 255                 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_wday,
 256                 tm->tm_hour, tm->tm_min, tm->tm_sec);
 257
 258         mon_day = rtc_month_days((tm->tm_mon), tm->tm_year + 1900);
 259
 260         if(tm->tm_sec >= 60 || tm->tm_sec < 0 )         //set  sec
 261                 regs[0x00] = bin2bcd(0x00);
 262         else
 263                 regs[0x00] = bin2bcd(tm->tm_sec);
 264
 265         if(tm->tm_min >= 60 || tm->tm_min < 0 )         //set  min
 266                 regs[0x01] = bin2bcd(0x00);
 267         else
 268                 regs[0x01] = bin2bcd(tm->tm_min);
 269
 270         if(tm->tm_hour >= 24 || tm->tm_hour < 0 )               //set  hour
 271                 regs[0x02] = bin2bcd(0x00);
 272         else
 273                 regs[0x02] = bin2bcd(tm->tm_hour);
 274
 275         if((tm->tm_mday) > mon_day)                             //if the input month day is bigger than the biggest day of this month, set the biggest day
 276                 regs[0x03] = bin2bcd(mon_day);
 277         else if((tm->tm_mday) > 0)
 278                 regs[0x03] = bin2bcd(tm->tm_mday);
 279         else if((tm->tm_mday) <= 0)
 280                 regs[0x03] = bin2bcd(0x01);
 281
 282         if( tm->tm_year >= 200)         // year >= 2100
 283                 regs[0x06] = bin2bcd(99);       //year = 2099
 284         else if(tm->tm_year >= 100)                     // 2000 <= year < 2100
 285                 regs[0x06] = bin2bcd(tm->tm_year - 100);
 286         else if(tm->tm_year >= 0){                              // 1900 <= year < 2000
 287                 regs[0x06] = bin2bcd(tm->tm_year);
 288                 regs[0x05] |= 0x80;
 289         }else{                                                                  // year < 1900
 290                 regs[0x06] = bin2bcd(0);        //year = 1900
 291                 regs[0x05] |= 0x80;
 292         }
 293         regs[0x04] = bin2bcd(tm->tm_wday);              //set  the  weekday
 294         regs[0x05] = (regs[0x05] & 0x80)| (bin2bcd(tm->tm_mon + 1) & 0x7F);             //set  the  month
 295
 296         mutex_lock(&hym8563->mutex);
 297 //      for(i=0;i<HYM8563_RTC_SECTION_LEN;i++){
 298 //              ret = hym8563_i2c_set_regs(client, RTC_SEC+i, &regs[i], 1);
 299 //      }
 300         hym8563_i2c_set_regs(client, RTC_SEC, regs, HYM8563_RTC_SECTION_LEN);
 301
 302         mutex_unlock(&hym8563->mutex);
 303
 304         return 0;
 305 }
 306
 307 static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
 308 {
 309         return hym8563_set_time(to_i2c_client(dev), tm);
 310 }
 311
 312 static int hym8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
 313 {
 314         struct i2c_client *client = to_i2c_client(dev);
 315         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 316         u8 regs[4] = { 0, };
 317
 318         pr_debug("enter\n");
 319         mutex_lock(&hym8563->mutex);
 320         hym8563_i2c_read_regs(client, RTC_A_MIN, regs, 4);
 321         regs[0] = 0x0;
 322         regs[0] |= TIE;
 323         hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
 324         mutex_unlock(&hym8563->mutex);
 325         return 0;
 326 }
 327
 328 static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 329 {
 330         struct i2c_client *client = to_i2c_client(dev);
 331         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 332         struct rtc_time now, *tm = &alarm->time;
 333         u8 regs[4] = { 0, };
 334         u8 mon_day;
 335         unsigned long   alarm_sec, now_sec;
 336         int diff_sec = 0;
 337
 338         pr_debug("%4d-%02d-%02d(%d) %02d:%02d:%02d enabled %d\n",
 339                 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_wday,
 340                 tm->tm_hour, tm->tm_min, tm->tm_sec, alarm->enabled);
 341
 342
 343         hym8563_read_datetime(client, &now);
 344
 345
 346         mutex_lock(&hym8563->mutex);
 347         rtc_tm_to_time(tm, &alarm_sec);
 348         rtc_tm_to_time(&now, &now_sec);
 349
 350         diff_sec = alarm_sec - now_sec;
 351
 352         if((diff_sec > 0) && (diff_sec < 256))
 353         {
 354                 printk("%s:diff_sec= %ds , use time\n",__func__, diff_sec);
 355
 356                 if (alarm->enabled == 1)
 357                 {
 358                         hym8563_set_count(client, diff_sec);
 359                         hym8563_enable_count(client, 1);
 360                 }
 361
 362                 else
 363                 {
 364                         hym8563_enable_count(client, 0);
 365                 }
 366
 367         }
 368         else
 369         {
 370                 printk("%s:diff_sec= %ds , use alarm\n",__func__, diff_sec);
 371                 hym8563_enable_count(client, 0);
 372
 373                 if(tm->tm_sec > 0)
 374                 {
 375                         rtc_tm_to_time(tm, &alarm_sec);
 376                         rtc_time_to_tm(alarm_sec, tm);
 377                 }
 378
 379                 hym8563->alarm = *alarm;
 380
 381                 regs[0] = 0x0;
 382                 hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
 383                 mon_day = rtc_month_days(tm->tm_mon, tm->tm_year + 1900);
 384                 hym8563_i2c_read_regs(client, RTC_A_MIN, regs, 4);
 385
 386                 if (tm->tm_min >= 60 || tm->tm_min < 0)         //set  min
 387                 regs[0x00] = bin2bcd(0x00) & 0x7f;
 388                 else
 389                 regs[0x00] = bin2bcd(tm->tm_min) & 0x7f;
 390                 if (tm->tm_hour >= 24 || tm->tm_hour < 0)       //set  hour
 391                 regs[0x01] = bin2bcd(0x00) & 0x7f;
 392                 else
 393                 regs[0x01] = bin2bcd(tm->tm_hour) & 0x7f;
 394                 regs[0x03] = bin2bcd (tm->tm_wday) & 0x7f;
 395
 396                 /* if the input month day is bigger than the biggest day of this month, set the biggest day */
 397                 if (tm->tm_mday > mon_day)
 398                 regs[0x02] = bin2bcd(mon_day) & 0x7f;
 399                 else if (tm->tm_mday > 0)
 400                 regs[0x02] = bin2bcd(tm->tm_mday) & 0x7f;
 401                 else if (tm->tm_mday <= 0)
 402                 regs[0x02] = bin2bcd(0x01) & 0x7f;
 403
 404                 hym8563_i2c_set_regs(client, RTC_A_MIN, regs, 4);
 405                 hym8563_i2c_read_regs(client, RTC_A_MIN, regs, 4);
 406                 hym8563_i2c_read_regs(client, RTC_CTL2, regs, 1);
 407                 if (alarm->enabled == 1)
 408                 regs[0] |= AIE;
 409                 else
 410                 regs[0] &= 0x0;
 411                 hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
 412                 hym8563_i2c_read_regs(client, RTC_CTL2, regs, 1);
 413
 414                 if(diff_sec <= 0)
 415                 {
 416                         pr_info("alarm sec  <= now sec\n");
 417                 }
 418
 419         }
 420
 421         mutex_unlock(&hym8563->mutex);
 422
 423         return 0;
 424 }
 425 #ifdef CONFIG_HDMI_SAVE_DATA
 426 int hdmi_get_data(void)
 427 {
 428     u8 regs=0;
 429     if(gClient)
 430         hym8563_i2c_read_regs(gClient, RTC_T_COUNT, &regs, 1);
 431     else
 432     {
 433         printk("%s rtc has no init\n",__func__);
 434         return -1;
 435     }
 436     if(regs==0 || regs==0xff){
 437         printk("%s rtc has no hdmi data\n",__func__);
 438         return -1;
 439     }
 440     return (regs-1);
 441 }
 442
 443 int hdmi_set_data(int data)
 444 {
 445     u8 regs = (data+1)&0xff;
 446     if(gClient)
 447         hym8563_i2c_set_regs(gClient, RTC_T_COUNT, &regs, 1);
 448     else
 449     {
 450         printk("%s rtc has no init\n",__func__);
 451         return -1;
 452     }
 453     return 0;
 454 }
 455
 456 EXPORT_SYMBOL(hdmi_get_data);
 457 EXPORT_SYMBOL(hdmi_set_data);
 458 #endif
 459 #if defined(CONFIG_RTC_INTF_DEV) || defined(CONFIG_RTC_INTF_DEV_MODULE)
 460 static int hym8563_i2c_open_alarm(struct i2c_client *client)
 461 {
 462         u8 data;
 463         hym8563_i2c_read_regs(client, RTC_CTL2, &data, 1);
 464         data |= AIE;
 465         hym8563_i2c_set_regs(client, RTC_CTL2, &data, 1);
 466
 467         return 0;
 468 }
 469
 470 static int hym8563_i2c_close_alarm(struct i2c_client *client)
 471 {
 472         u8 data;
 473         hym8563_i2c_read_regs(client, RTC_CTL2, &data, 1);
 474         data &= ~AIE;
 475         hym8563_i2c_set_regs(client, RTC_CTL2, &data, 1);
 476
 477         return 0;
 478 }
 479
 480 static int hym8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
 481 {
 482         struct i2c_client *client = to_i2c_client(dev);
 483
 484         switch (cmd) {
 485         case RTC_AIE_OFF:
 486                 if(hym8563_i2c_close_alarm(client) < 0)
 487                         goto err;
 488                 break;
 489         case RTC_AIE_ON:
 490                 if(hym8563_i2c_open_alarm(client))
 491                         goto err;
 492                 break;
 493         default:
 494                 return -ENOIOCTLCMD;
 495         }
 496         return 0;
 497 err:
 498         return -EIO;
 499 }
 500 #else
 501 #define hym8563_rtc_ioctl NULL
 502 #endif
 503
 504 #if defined(CONFIG_RTC_INTF_PROC) || defined(CONFIG_RTC_INTF_PROC_MODULE)
 505 static int hym8563_rtc_proc(struct device *dev, struct seq_file *seq)
 506 {
 507         return 0;
 508 }
 509 #else
 510 #define hym8563_rtc_proc NULL
 511 #endif
 512
 513 static irqreturn_t hym8563_wakeup_irq(int irq, void *data)
 514 {
 515         struct hym8563 *hym8563 = data;
 516         struct i2c_client *client = hym8563->client;
 517         u8 value;
 518
 519         mutex_lock(&hym8563->mutex);
 520         hym8563_i2c_read_regs(client, RTC_CTL2, &value, 1);
 521         value &= ~(AF|TF);
 522         hym8563_i2c_set_regs(client, RTC_CTL2, &value, 1);
 523         mutex_unlock(&hym8563->mutex);
 524
 525         rtc_update_irq(hym8563->rtc, 1, RTC_IRQF | RTC_AF | RTC_UF);
 526
 527         //printk("%s:irq=%d\n",__func__,irq);
 528         return IRQ_HANDLED;
 529 }
 530
 531 static const struct rtc_class_ops hym8563_rtc_ops = {
 532         .read_time      = hym8563_rtc_read_time,
 533         .set_time       = hym8563_rtc_set_time,
 534         .read_alarm     = hym8563_rtc_read_alarm,
 535         .set_alarm      = hym8563_rtc_set_alarm,
 536         .ioctl          = hym8563_rtc_ioctl,
 537         .proc           = hym8563_rtc_proc
 538 };
 539
 540 static int  hym8563_probe(struct i2c_client *client, const struct i2c_device_id *id)
 541 {
 542         int rc = 0;
 543         u8 reg = 0;
 544         struct hym8563 *hym8563;
 545         struct rtc_device *rtc = NULL;
 546         struct rtc_time tm_read, tm = {
 547                 .tm_wday = 6,
 548                 .tm_year = 111,
 549                 .tm_mon = 0,
 550                 .tm_mday = 1,
 551                 .tm_hour = 12,
 552                 .tm_min = 0,
 553                 .tm_sec = 0,
 554         };
 555
 556         struct device_node *np = client->dev.of_node;
 557         unsigned long irq_flags;
 558         int result;
 559
 560         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
 561                 return -ENODEV;
 562
 563         hym8563 = devm_kzalloc(&client->dev,sizeof(*hym8563), GFP_KERNEL);
 564         if (!hym8563) {
 565                 return -ENOMEM;
 566         }
 567
 568         gClient = client;
 569         hym8563->client = client;
 570         hym8563->alarm.enabled = 0;
 571         client->irq = 0;
 572         mutex_init(&hym8563->mutex);
 573         wake_lock_init(&hym8563->wake_lock, WAKE_LOCK_SUSPEND, "rtc_hym8563");
 574         i2c_set_clientdata(client, hym8563);
 575
 576         hym8563_init_device(client);
 577         hym8563_enable_count(client, 0);
 578
 579         // check power down
 580         hym8563_i2c_read_regs(client,RTC_SEC,&reg,1);
 581         if (reg&0x80) {
 582                 dev_info(&client->dev, "clock/calendar information is no longer guaranteed\n");
 583                 hym8563_set_time(client, &tm);
 584         }
 585
 586         hym8563_read_datetime(client, &tm_read);        //read time from hym8563
 587
 588         if(((tm_read.tm_year < 70) | (tm_read.tm_year > 137 )) | (tm_read.tm_mon == -1) | (rtc_valid_tm(&tm_read) != 0)) //if the hym8563 haven't initialized
 589         {
 590                 hym8563_set_time(client, &tm);  //initialize the hym8563
 591         }
 592
 593         client->irq = of_get_named_gpio_flags(np, "irq_gpio", 0,(enum of_gpio_flags *)&irq_flags);
 594         if(client->irq >= 0)
 595         {
 596                 hym8563->irq = gpio_to_irq(client->irq);
 597                 result = devm_request_threaded_irq(&client->dev, hym8563->irq, NULL, hym8563_wakeup_irq, irq_flags | IRQF_ONESHOT, client->dev.driver->name,hym8563 );
 598                 if (result) {
 599                         printk(KERN_ERR "%s:fail to request irq = %d, ret = 0x%x\n",__func__, hym8563->irq, result);
 600                         goto exit;
 601                 }
 602                 enable_irq_wake(hym8563->irq);
 603                 device_init_wakeup(&client->dev, 1);
 604         }
 605         rtc = devm_rtc_device_register(&client->dev,
 606                         client->name,
 607                         &hym8563_rtc_ops, THIS_MODULE);
 608         if (IS_ERR(rtc)) {
 609                 rc = PTR_ERR(rtc);
 610                 rtc = NULL;
 611                 goto exit;
 612         }
 613         hym8563->rtc = rtc;
 614
 615         return 0;
 616
 617 exit:
 618         if (hym8563) {
 619                 wake_lock_destroy(&hym8563->wake_lock);
 620         }
 621         return rc;
 622 }
 623
 624 static int  hym8563_remove(struct i2c_client *client)
 625 {
 626         struct hym8563 *hym8563 = i2c_get_clientdata(client);
 627
 628         wake_lock_destroy(&hym8563->wake_lock);
 629
 630         return 0;
 631 }
 632
 633
 634 void hym8563_shutdown(struct i2c_client * client)
 635 {       u8 regs[2];
 636     int ret;
 637     //disable clkout
 638     regs[0] = 0x00;
 639     ret=hym8563_i2c_set_regs(client, RTC_CLKOUT, regs, 1);
 640     if(ret<0)
 641         printk("rtc shutdown is error\n");
 642 }
 643
 644
 645
 646 static const struct i2c_device_id hym8563_id[] = {
 647         { "rtc_hym8563", 0 },
 648         { }
 649 };
 650 MODULE_DEVICE_TABLE(i2c, hym8563_id);
 651
 652 static struct of_device_id rtc_dt_ids[] = {
 653         { .compatible = "rtc,hym8563" },
 654         {},
 655 };
 656
 657 struct i2c_driver hym8563_driver = {
 658         .driver         = {
 659                 .name   = "rtc_hym8563",
 660                 .owner  = THIS_MODULE,
 661                 .of_match_table = of_match_ptr(rtc_dt_ids),
 662         },
 663         .probe          = hym8563_probe,
 664         .remove         = hym8563_remove,
 665         //.shutdown=hym8563_shutdown,
 666         .id_table       = hym8563_id,
 667 };
 668
 669 static int __init hym8563_init(void)
 670 {
 671         return i2c_add_driver(&hym8563_driver);
 672 }
 673
 674 static void __exit hym8563_exit(void)
 675 {
 676         i2c_del_driver(&hym8563_driver);
 677 }
 678
 679 MODULE_AUTHOR("lhh lhh@rock-chips.com");
 680 MODULE_DESCRIPTION("HYM8563 RTC driver");
 681 MODULE_LICENSE("GPL");
 682
 683 module_init(hym8563_init);
 684 module_exit(hym8563_exit);
 685