2 * Real Time Clock driver for rk808
4 * Author: zhangqing <zhangqing@rock-chips.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/time.h>
16 #include <linux/rtc.h>
17 #include <linux/slab.h>
18 #include <linux/bcd.h>
19 #include <linux/interrupt.h>
20 #include <linux/ioctl.h>
21 #include <linux/completion.h>
22 #include <linux/mfd/rk808.h>
23 #include <linux/delay.h>
24 #include <linux/platform_device.h>
25 #include <linux/miscdevice.h>
26 #include <linux/irqdomain.h>
30 /* RTC_CTRL_REG bitfields */
31 #define BIT_RTC_CTRL_REG_STOP_RTC_M 0x01
32 #define BIT_RTC_CTRL_REG_ROUND_30S_M 0x02
33 #define BIT_RTC_CTRL_REG_AUTO_COMP_M 0x04
34 #define BIT_RTC_CTRL_REG_MODE_12_24_M 0x08
35 #define BIT_RTC_CTRL_REG_TEST_MODE_M 0x10
36 #define BIT_RTC_CTRL_REG_SET_32_COUNTER_M 0x20
37 #define BIT_RTC_CTRL_REG_GET_TIME_M 0x40
38 #define BIT_RTC_CTRL_REG_RTC_V_OPT_M 0x80
40 /* RTC_STATUS_REG bitfields */
41 #define BIT_RTC_STATUS_REG_RUN_M 0x02
42 #define BIT_RTC_STATUS_REG_1S_EVENT_M 0x04
43 #define BIT_RTC_STATUS_REG_1M_EVENT_M 0x08
44 #define BIT_RTC_STATUS_REG_1H_EVENT_M 0x10
45 #define BIT_RTC_STATUS_REG_1D_EVENT_M 0x20
46 #define BIT_RTC_STATUS_REG_ALARM_M 0x40
47 #define BIT_RTC_STATUS_REG_POWER_UP_M 0x80
49 /* RTC_INTERRUPTS_REG bitfields */
50 #define BIT_RTC_INTERRUPTS_REG_EVERY_M 0x03
51 #define BIT_RTC_INTERRUPTS_REG_IT_TIMER_M 0x04
52 #define BIT_RTC_INTERRUPTS_REG_IT_ALARM_M 0x08
54 /* DEVCTRL bitfields */
55 #define BIT_RTC_PWDN 0x40
57 /* REG_SECONDS_REG through REG_YEARS_REG is how many registers? */
58 #define ALL_TIME_REGS 7
59 #define ALL_ALM_REGS 6
62 #define RTC_SET_TIME_RETRIES 5
63 #define RTC_GET_TIME_RETRIES 5
68 struct rtc_device *rtc;
69 unsigned int alarm_enabled:1;
73 * Read current time and date in RTC
75 static int rk808_rtc_readtime(struct device *dev, struct rtc_time *tm)
77 struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
78 struct rk808 *rk808 = rk808_rtc->rk808;
80 unsigned char rtc_data[ALL_TIME_REGS + 1];
84 ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
86 /* Has the RTC been programmed? */
87 ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
89 dev_err(dev, "Failed to read RTC control: %d\n", ret);
93 rtc_ctl = ret & (~BIT_RTC_CTRL_REG_RTC_V_OPT_M);
95 ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
97 dev_err(dev, "Failed to write RTC control: %d\n", ret);
102 /* Read twice to make sure we don't read a corrupt, partially
103 * incremented, value.
106 ret = rk808_bulk_read(rk808, RK808_SECONDS_REG,
107 ALL_TIME_REGS, rtc_data);
111 tm->tm_sec = bcd2bin(rtc_data[0]);
112 tm->tm_min = bcd2bin(rtc_data[1]);
113 tm->tm_hour = bcd2bin(rtc_data[2]) ;
114 tm->tm_mday = bcd2bin(rtc_data[3]);
115 tm->tm_mon = bcd2bin(rtc_data[4]) - 1;
116 tm->tm_year = bcd2bin(rtc_data[5]) + 100;
117 tm->tm_wday = bcd2bin(rtc_data[6]);
119 printk( "RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
120 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_wday,
121 tm->tm_hour, tm->tm_min, tm->tm_sec);
125 } while (++count < RTC_GET_TIME_RETRIES);
126 dev_err(dev, "Timed out reading current time\n");
128 rtc_data[0] = rk808_reg_read(rk808,0x00);
129 rtc_data[1] = rk808_reg_read(rk808,0x01);
130 rtc_data[2] = rk808_reg_read(rk808,0x02);
131 rtc_data[3] = rk808_reg_read(rk808,0x03);
132 rtc_data[4] = rk808_reg_read(rk808,0x04);
133 rtc_data[5] = rk808_reg_read(rk808,0x05);
134 rtc_data[6] = rk808_reg_read(rk808,0x06);
136 tm->tm_sec = bcd2bin(rtc_data[0]);
137 tm->tm_min = bcd2bin(rtc_data[1]);
138 tm->tm_hour = bcd2bin(rtc_data[2]) ;
139 tm->tm_mday = bcd2bin(rtc_data[3]);
140 tm->tm_mon = bcd2bin(rtc_data[4]) - 1;
141 tm->tm_year = bcd2bin(rtc_data[5]) + 100;
142 tm->tm_wday = bcd2bin(rtc_data[6]);
144 dev_dbg(dev, "RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
145 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_wday,tm->tm_hour , tm->tm_min, tm->tm_sec);
153 * Set current time and date in RTC
155 static int rk808_rtc_set_time(struct device *dev, struct rtc_time *tm)
157 struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
158 struct rk808 *rk808 = rk808_rtc->rk808;
161 unsigned char rtc_data[ALL_TIME_REGS + 1];
163 rtc_data[0] = bin2bcd(tm->tm_sec);
164 rtc_data[1] = bin2bcd(tm->tm_min);
165 rtc_data[2] = bin2bcd(tm->tm_hour );
166 rtc_data[3] = bin2bcd(tm->tm_mday);
167 rtc_data[4] = bin2bcd(tm->tm_mon + 1);
168 rtc_data[5] = bin2bcd(tm->tm_year - 100);
169 rtc_data[6] = bin2bcd(tm->tm_wday);
171 dev_dbg(dev, "set RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
172 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_wday,tm->tm_hour , tm->tm_min, tm->tm_sec);
175 ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
177 /* Stop RTC while updating the TC registers */
178 ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
180 dev_err(dev, "Failed to read RTC control: %d\n", ret);
184 rtc_ctl = ret | (BIT_RTC_CTRL_REG_STOP_RTC_M);
186 ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
188 dev_err(dev, "Failed to write RTC control: %d\n", ret);
192 /* update all the time registers in one shot */
193 ret = rk808_bulk_write(rk808, RK808_SECONDS_REG,
194 ALL_TIME_REGS, rtc_data);
196 dev_err(dev, "Failed to read RTC times: %d\n", ret);
200 rk808_reg_write(rk808,0x00,rtc_data[0]);
201 rk808_reg_write(rk808,0x01,rtc_data[1]);
202 rk808_reg_write(rk808,0x02,rtc_data[2]);
203 rk808_reg_write(rk808,0x03,rtc_data[3]);
204 rk808_reg_write(rk808,0x04,rtc_data[4]);
205 rk808_reg_write(rk808,0x05,rtc_data[5]);
206 rk808_reg_write(rk808,0x06,rtc_data[6]);
210 ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
212 /* Start RTC again */
213 ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
215 dev_err(dev, "Failed to read RTC control: %d\n", ret);
219 rtc_ctl = ret &(~ BIT_RTC_CTRL_REG_STOP_RTC_M);
221 ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
223 dev_err(dev, "Failed to write RTC control: %d\n", ret);
231 * Read alarm time and date in RTC
233 static int rk808_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
235 struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
237 unsigned char alrm_data[ALL_ALM_REGS + 1];
239 ret = rk808_bulk_read(rk808_rtc->rk808, RK808_ALARM_SECONDS_REG,
240 ALL_ALM_REGS, alrm_data);
242 dev_err(dev, "Failed to read alarm time: %d\n", ret);
246 alrm_data[0] = rk808_reg_read(rk808_rtc->rk808,0x08);
247 alrm_data[1] = rk808_reg_read(rk808_rtc->rk808,0x09);
248 alrm_data[2] = rk808_reg_read(rk808_rtc->rk808,0x0a);
249 alrm_data[3] = rk808_reg_read(rk808_rtc->rk808,0x0b);
250 alrm_data[4] = rk808_reg_read(rk808_rtc->rk808,0x0c);
251 alrm_data[5] = rk808_reg_read(rk808_rtc->rk808,0x0d);
255 /* some of these fields may be wildcard/"match all" */
256 alrm->time.tm_sec = bcd2bin(alrm_data[0]);
257 alrm->time.tm_min = bcd2bin(alrm_data[1]);
258 alrm->time.tm_hour = bcd2bin(alrm_data[2]);
259 alrm->time.tm_mday = bcd2bin(alrm_data[3]);
260 alrm->time.tm_mon = bcd2bin(alrm_data[4]) - 1;
261 alrm->time.tm_year = bcd2bin(alrm_data[5]) + 100;
263 ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_INT_REG);
265 dev_err(dev, "Failed to read RTC control: %d\n", ret);
268 dev_dbg(dev,"alrm read RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
269 1900 + alrm->time.tm_year, alrm->time.tm_mon + 1, alrm->time.tm_mday, alrm->time.tm_wday, alrm->time.tm_hour, alrm->time.tm_min, alrm->time.tm_sec);
273 if (ret & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M)
281 static int rk808_rtc_stop_alarm(struct rk808_rtc *rk808_rtc)
283 rk808_rtc->alarm_enabled = 0;
285 return rk808_clear_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
286 BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
290 static int rk808_rtc_start_alarm(struct rk808_rtc *rk808_rtc)
292 rk808_rtc->alarm_enabled = 1;
294 return rk808_set_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
295 BIT_RTC_INTERRUPTS_REG_IT_ALARM_M,BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
299 static int rk808_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
301 struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
303 unsigned char alrm_data[ALL_TIME_REGS + 1];
305 ret = rk808_rtc_stop_alarm(rk808_rtc);
307 dev_err(dev, "Failed to stop alarm: %d\n", ret);
311 dev_dbg(dev,"alrm set RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
312 1900 + alrm->time.tm_year, alrm->time.tm_mon + 1, alrm->time.tm_mday, alrm->time.tm_wday, alrm->time.tm_hour, alrm->time.tm_min, alrm->time.tm_sec);
314 alrm_data[0] = bin2bcd(alrm->time.tm_sec);
315 alrm_data[1] = bin2bcd(alrm->time.tm_min);
316 alrm_data[2] = bin2bcd(alrm->time.tm_hour );
317 alrm_data[3] = bin2bcd(alrm->time.tm_mday);
318 alrm_data[4] = bin2bcd(alrm->time.tm_mon + 1);
319 alrm_data[5] = bin2bcd(alrm->time.tm_year - 100);
321 ret = rk808_bulk_write(rk808_rtc->rk808, RK808_ALARM_SECONDS_REG,
322 ALL_ALM_REGS, alrm_data);
324 dev_err(dev, "Failed to read alarm time: %d\n", ret);
328 rk808_reg_write(rk808_rtc->rk808,0x08,alrm_data[0]);
329 rk808_reg_write(rk808_rtc->rk808,0x09,alrm_data[1]);
330 rk808_reg_write(rk808_rtc->rk808,0x0a,alrm_data[2]);
331 rk808_reg_write(rk808_rtc->rk808,0x0b,alrm_data[3]);
332 rk808_reg_write(rk808_rtc->rk808,0x0c,alrm_data[4]);
333 rk808_reg_write(rk808_rtc->rk808,0x0d,alrm_data[5]);
337 ret = rk808_rtc_start_alarm(rk808_rtc);
339 dev_err(dev, "Failed to start alarm: %d\n", ret);
347 static int rk808_rtc_alarm_irq_enable(struct device *dev,
348 unsigned int enabled)
350 struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
353 return rk808_rtc_start_alarm(rk808_rtc);
355 return rk808_rtc_stop_alarm(rk808_rtc);
358 static int rk808_rtc_update_irq_enable(struct device *dev,
359 unsigned int enabled)
361 struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
364 return rk808_set_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
365 BIT_RTC_INTERRUPTS_REG_IT_TIMER_M,BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
367 return rk808_clear_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,
368 BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
372 * We will just handle setting the frequency and make use the framework for
373 * reading the periodic interupts.
375 * @freq: Current periodic IRQ freq:
376 * bit 0: every second
377 * bit 1: every minute
382 static int rk808_rtc_irq_set_freq(struct device *dev, int freq)
384 struct rk808_rtc *rk808_rtc = dev_get_drvdata(dev);
388 if (freq < 0 || freq > 3)
391 ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_INT_REG);
393 dev_err(dev, "Failed to read RTC interrupt: %d\n", ret);
397 rtc_ctl = ret | freq;
399 ret = rk808_reg_write(rk808_rtc->rk808, RK808_RTC_INT_REG, rtc_ctl);
401 dev_err(dev, "Failed to write RTC control: %d\n", ret);
408 static irqreturn_t rk808_alm_irq(int irq, void *data)
410 struct rk808_rtc *rk808_rtc = data;
414 /*Dummy read -- mandatory for status register*/
415 ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_STATUS_REG);
417 printk("%s:Failed to read RTC status: %d\n", __func__, ret);
421 ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_STATUS_REG);
423 printk("%s:Failed to read RTC status: %d\n", __func__, ret);
428 //The alarm interrupt keeps its low level, until the micro-controller write 1 in the ALARM bit of the RTC_STATUS_REG register.
429 ret = rk808_reg_write(rk808_rtc->rk808, RK808_RTC_STATUS_REG,rtc_ctl);
431 printk("%s:Failed to read RTC status: %d\n", __func__, ret);
435 rtc_update_irq(rk808_rtc->rtc, 1, RTC_IRQF | RTC_AF);
437 printk("%s:irq=%d,rtc_ctl=0x%x\n",__func__,irq,rtc_ctl);
441 static irqreturn_t rk808_per_irq(int irq, void *data)
443 struct rk808_rtc *rk808_rtc = data;
445 rtc_update_irq(rk808_rtc->rtc, 1, RTC_IRQF | RTC_UF);
447 //printk("%s:irq=%d\n",__func__,irq);
451 static const struct rtc_class_ops rk808_rtc_ops = {
452 .read_time = rk808_rtc_readtime,
453 //.set_mmss = rk808_rtc_set_mmss,
454 .set_time = rk808_rtc_set_time,
455 .read_alarm = rk808_rtc_readalarm,
456 .set_alarm = rk808_rtc_setalarm,
457 .alarm_irq_enable = rk808_rtc_alarm_irq_enable,
458 //.update_irq_enable = rk808_rtc_update_irq_enable,
459 //.irq_set_freq = rk808_rtc_irq_set_freq,
463 /* Turn off the alarm if it should not be a wake source. */
464 static int rk808_rtc_suspend(struct device *dev)
466 struct platform_device *pdev = to_platform_device(dev);
467 struct rk808_rtc *rk808_rtc = dev_get_drvdata(&pdev->dev);
470 if (rk808_rtc->alarm_enabled && device_may_wakeup(&pdev->dev))
471 ret = rk808_rtc_start_alarm(rk808_rtc);
473 ret = rk808_rtc_stop_alarm(rk808_rtc);
476 dev_err(&pdev->dev, "Failed to update RTC alarm: %d\n", ret);
481 /* Enable the alarm if it should be enabled (in case it was disabled to
482 * prevent use as a wake source).
484 static int rk808_rtc_resume(struct device *dev)
486 struct platform_device *pdev = to_platform_device(dev);
487 struct rk808_rtc *rk808_rtc = dev_get_drvdata(&pdev->dev);
490 if (rk808_rtc->alarm_enabled) {
491 ret = rk808_rtc_start_alarm(rk808_rtc);
494 "Failed to restart RTC alarm: %d\n", ret);
500 /* Unconditionally disable the alarm */
501 static int rk808_rtc_freeze(struct device *dev)
503 struct platform_device *pdev = to_platform_device(dev);
504 struct rk808_rtc *rk808_rtc = dev_get_drvdata(&pdev->dev);
507 ret = rk808_rtc_stop_alarm(rk808_rtc);
509 dev_err(&pdev->dev, "Failed to stop RTC alarm: %d\n", ret);
514 #define rk808_rtc_suspend NULL
515 #define rk808_rtc_resume NULL
516 #define rk808_rtc_freeze NULL
518 extern struct rk808 *g_rk808;
519 struct platform_device *rk808_pdev;
520 struct rtc_time tm_def = { // 2012.1.1 12:00:00 Saturday
530 static int rk808_rtc_probe(struct platform_device *pdev)
532 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
533 struct rk808_rtc *rk808_rtc;
540 printk("%s,line=%d\n", __func__,__LINE__);
542 rk808_rtc = kzalloc(sizeof(*rk808_rtc), GFP_KERNEL);
543 if (rk808_rtc == NULL)
546 platform_set_drvdata(pdev, rk808_rtc);
547 rk808_rtc->rk808 = rk808;
549 /* Take rtc out of reset */
551 ret = rk808_reg_read(rk808, RK808_DEVCTRL);
553 dev_err(&pdev->dev, "Failed to read RK808_DEVCTRL: %d\n", ret);
557 if(ret & BIT_RTC_PWDN)
559 rtc_ctl = ret & (~BIT_RTC_PWDN);
561 ret = rk808_reg_write(rk808, RK808_DEVCTRL, rtc_ctl);
563 dev_err(&pdev->dev, "Failed to write RTC control: %d\n", ret);
568 /*start rtc default*/
569 ret = rk808_reg_read(rk808, RK808_RTC_CTRL_REG);
571 dev_err(&pdev->dev, "Failed to read RTC control: %d\n", ret);
574 rtc_ctl = ret & (~BIT_RTC_CTRL_REG_STOP_RTC_M);
576 ret = rk808_reg_write(rk808, RK808_RTC_CTRL_REG, rtc_ctl);
578 dev_err(&pdev->dev, "Failed to write RTC control: %d\n", ret);
582 ret = rk808_reg_read(rk808, RK808_RTC_STATUS_REG);
584 dev_err(&pdev->dev, "Failed to read RTC status: %d\n", ret);
587 rk808_reg_write(rk808,RK808_RTC_STATUS_REG,0xfe);
590 ret = rk808_rtc_readtime(&pdev->dev, &tm);
593 dev_err(&pdev->dev, "Failed to read RTC time\n");
597 ret = rtc_valid_tm(&tm);
599 dev_err(&pdev->dev,"invalid date/time and init time\n");
600 rk808_rtc_set_time(&pdev->dev, &tm_def); // 2012-01-01 12:00:00
601 // DBG( "set RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",1900 + tm_def.tm_year, tm_def.tm_mon + 1, tm_def.tm_mday, tm_def.tm_wday,tm_def.tm_hour, tm_def.tm_min, tm_def.tm_sec);
604 device_init_wakeup(&pdev->dev, 1);
606 rk808_rtc->rtc = rtc_device_register("rk808", &pdev->dev,
607 &rk808_rtc_ops, THIS_MODULE);
608 if (IS_ERR(rk808_rtc->rtc)) {
609 ret = PTR_ERR(rk808_rtc->rtc);
613 per_irq = irq_create_mapping(rk808->irq_domain, RK808_IRQ_RTC_PERIOD);
614 alm_irq = irq_create_mapping(rk808->irq_domain, RK808_IRQ_RTC_ALARM);
616 /*request rtc and alarm irq of rk808*/
617 ret = devm_request_threaded_irq(rk808->dev,per_irq, NULL, rk808_per_irq,
618 IRQF_TRIGGER_RISING, "RTC period",
621 dev_err(&pdev->dev, "Failed to request periodic IRQ %d: %d\n",
625 ret = devm_request_threaded_irq(rk808->dev,alm_irq, NULL, rk808_alm_irq,
626 IRQF_TRIGGER_RISING, "RTC alarm",
629 dev_err(&pdev->dev, "Failed to request alarm IRQ %d: %d\n",
635 rk808_set_bits(rk808_rtc->rk808, RK808_RTC_STATUS_REG,(0x1<< 6),(0x1 <<6));
636 rk808_set_bits(rk808_rtc->rk808, RK808_RTC_INT_REG,0x0c,0x0c);
637 rk808_set_bits(rk808_rtc->rk808,RK808_INT_STS_REG1,(0x3 << 5),(0x3 <<5));
638 rk808_set_bits(rk808_rtc->rk808, RK808_INT_STS_MSK_REG1,(0x3 <<5),0);
641 // enable_irq_wake(alm_irq); // so rk808 alarm irq can wake up system
644 printk("%s:ok\n",__func__);
653 static int rk808_rtc_remove(struct platform_device *pdev)
655 struct rk808_rtc *rk808_rtc = platform_get_drvdata(pdev);
656 int per_irq = rk808_rtc->rk808->irq_base + RK808_IRQ_RTC_PERIOD;
657 int alm_irq = rk808_rtc->rk808->irq_base + RK808_IRQ_RTC_ALARM;
659 free_irq(alm_irq, rk808_rtc);
660 free_irq(per_irq, rk808_rtc);
661 rtc_device_unregister(rk808_rtc->rtc);
667 static const struct dev_pm_ops rk808_rtc_pm_ops = {
668 .suspend = rk808_rtc_suspend,
669 .resume = rk808_rtc_resume,
671 .freeze = rk808_rtc_freeze,
672 .thaw = rk808_rtc_resume,
673 .restore = rk808_rtc_resume,
675 .poweroff = rk808_rtc_suspend,
678 static struct platform_driver rk808_rtc_driver = {
679 .probe = rk808_rtc_probe,
680 .remove = rk808_rtc_remove,
683 .pm = &rk808_rtc_pm_ops,
687 static ssize_t rtc_rk808_test_write(struct file *file,
688 const char __user *buf, size_t count, loff_t *offset)
692 struct platform_device *pdev;
694 struct rtc_wkalrm alrm;
695 struct rk808_rtc *rk808_rtc;
699 ret = copy_from_user(nr_buf, buf, count);
703 sscanf(nr_buf, "%d", &nr);
706 printk("%s:data is error\n",__func__);
716 rk808_rtc = dev_get_drvdata(&pdev->dev);
729 ret = rk808_rtc_set_time(&pdev->dev, &tm); // 2011-01-01 12:00:00
732 dev_err(&pdev->dev, "Failed to set RTC time\n");
739 ret = rk808_rtc_readtime(&pdev->dev, &tm);
741 dev_err(&pdev->dev, "Failed to read RTC time\n");
743 dev_info(&pdev->dev, "RTC date/time %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
744 1900 + tm.tm_year, tm.tm_mon + 1, tm.tm_mday, tm.tm_wday,
745 tm.tm_hour, tm.tm_min, tm.tm_sec);
748 printk("%s:ok\n",__func__);
750 printk("%s:error\n",__func__);
756 //2000-01-01 00:00:30
759 alrm.time.tm_sec = tm.tm_sec+30;
760 alrm.time.tm_min = tm.tm_min;
764 alrm.time.tm_sec = tm.tm_sec-30;
765 alrm.time.tm_min = tm.tm_min+1;
767 alrm.time.tm_hour = tm.tm_hour;
768 alrm.time.tm_mday = tm.tm_mday;
769 alrm.time.tm_mon = tm.tm_mon;
770 alrm.time.tm_year = tm.tm_year;
771 rk808_rtc_alarm_irq_enable(&pdev->dev, 1);
772 rk808_rtc_setalarm(&pdev->dev, &alrm);
774 dev_info(&pdev->dev, "Set alarm %4d-%02d-%02d(%d) %02d:%02d:%02d\n",
775 1900 + alrm.time.tm_year, alrm.time.tm_mon + 1, alrm.time.tm_mday, alrm.time.tm_wday,
776 alrm.time.tm_hour, alrm.time.tm_min, alrm.time.tm_sec);
782 ret = rk808_reg_read(rk808_rtc->rk808, RK808_RTC_STATUS_REG);
784 printk("%s:Failed to read RTC status: %d\n", __func__, ret);
787 printk("%s:ret=0x%x\n",__func__,ret&0xff);
789 ret = rk808_reg_write(rk808_rtc->rk808, RK808_RTC_STATUS_REG, ret&0xff);
791 printk("%s:Failed to read RTC status: %d\n", __func__, ret);
797 rk808_rtc_update_irq_enable(&pdev->dev, 1);
800 rk808_rtc_update_irq_enable(&pdev->dev, 0);
805 static const struct file_operations rtc_rk808_test_fops = {
806 .write = rtc_rk808_test_write,
809 static struct miscdevice rtc_rk808_test_misc = {
810 .minor = MISC_DYNAMIC_MINOR,
811 .name = "rtc_rk808_test",
812 .fops = &rtc_rk808_test_fops,
816 static int __init rk808_rtc_init(void)
818 misc_register(&rtc_rk808_test_misc);
819 return platform_driver_register(&rk808_rtc_driver);
821 subsys_initcall_sync(rk808_rtc_init);
823 static void __exit rk808_rtc_exit(void)
825 misc_deregister(&rtc_rk808_test_misc);
826 platform_driver_unregister(&rk808_rtc_driver);
828 module_exit(rk808_rtc_exit);
830 MODULE_DESCRIPTION("RTC driver for the rk808 series PMICs");
831 MODULE_AUTHOR("ZHANGQING <zhanqging@rock-chips.com>");
832 MODULE_LICENSE("GPL");
833 MODULE_ALIAS("platform:rk808-rtc");