Lines Matching refs:ds1305
3 * rtc-ds1305.c -- driver for DS1305 and DS1306 SPI RTC chips
15 #include <linux/spi/ds1305.h>
76 /* trickle bits are defined in <linux/spi/ds1305.h> */
84 struct ds1305 {
141 struct ds1305 *ds1305 = dev_get_drvdata(dev);
146 buf[1] = ds1305->ctrl[0];
149 if (ds1305->ctrl[0] & DS1305_AEI0)
157 err = spi_write_then_read(ds1305->spi, buf, sizeof(buf), NULL, 0);
159 ds1305->ctrl[0] = buf[1];
172 struct ds1305 *ds1305 = dev_get_drvdata(dev);
180 status = spi_write_then_read(ds1305->spi, &addr, sizeof(addr),
207 struct ds1305 *ds1305 = dev_get_drvdata(dev);
222 *bp++ = hour2bcd(ds1305->hr12, time->tm_hour);
231 return spi_write_then_read(ds1305->spi, buf, sizeof(buf),
264 * Context: caller holds rtc->ops_lock (to protect ds1305->ctrl)
268 struct ds1305 *ds1305 = dev_get_drvdata(dev);
269 struct spi_device *spi = ds1305->spi;
281 ds1305->ctrl, sizeof(ds1305->ctrl));
285 alm->enabled = !!(ds1305->ctrl[0] & DS1305_AEI0);
286 alm->pending = !!(ds1305->ctrl[1] & DS1305_AEI0);
316 * Context: caller holds rtc->ops_lock (to protect ds1305->ctrl)
320 struct ds1305 *ds1305 = dev_get_drvdata(dev);
321 struct spi_device *spi = ds1305->spi;
339 if ((later - now) > ds1305->rtc->alarm_offset_max)
343 if (ds1305->ctrl[0] & DS1305_AEI0) {
344 ds1305->ctrl[0] &= ~DS1305_AEI0;
347 buf[1] = ds1305->ctrl[0];
348 status = spi_write_then_read(ds1305->spi, buf, 2, NULL, 0);
357 buf[1 + DS1305_HOUR] = hour2bcd(ds1305->hr12, alm->time.tm_hour);
370 ds1305->ctrl[0] |= DS1305_AEI0;
373 buf[1] = ds1305->ctrl[0];
374 status = spi_write_then_read(ds1305->spi, buf, 2, NULL, 0);
384 struct ds1305 *ds1305 = dev_get_drvdata(dev);
389 if ((ds1305->ctrl[2] & 0xf0) == DS1305_TRICKLE_MAGIC) {
390 switch (ds1305->ctrl[2] & 0x0c) {
400 switch (ds1305->ctrl[2] & 0x03) {
437 struct ds1305 *ds1305 = container_of(work, struct ds1305, work);
438 struct spi_device *spi = ds1305->spi;
442 /* lock to protect ds1305->ctrl */
443 rtc_lock(ds1305->rtc);
449 ds1305->ctrl[0] &= ~(DS1305_AEI1 | DS1305_AEI0);
450 ds1305->ctrl[1] = 0;
453 buf[1] = ds1305->ctrl[0];
461 rtc_unlock(ds1305->rtc);
463 if (!test_bit(FLAG_EXITING, &ds1305->flags))
466 rtc_update_irq(ds1305->rtc, 1, RTC_AF | RTC_IRQF);
471 * mutex locking for ds1305->ctrl ... unlike I2C, we could issue async
476 struct ds1305 *ds1305 = p;
479 schedule_work(&ds1305->work);
510 struct ds1305 *ds1305 = priv;
511 struct spi_device *spi = ds1305->spi;
525 struct ds1305 *ds1305 = priv;
526 struct spi_device *spi = ds1305->spi;
545 struct ds1305 *ds1305;
569 ds1305 = devm_kzalloc(&spi->dev, sizeof(*ds1305), GFP_KERNEL);
570 if (!ds1305)
572 ds1305->spi = spi;
573 spi_set_drvdata(spi, ds1305);
578 ds1305->ctrl, sizeof(ds1305->ctrl));
585 dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "read", ds1305->ctrl);
592 if ((ds1305->ctrl[0] & 0x38) != 0 || (ds1305->ctrl[1] & 0xfc) != 0) {
596 if (ds1305->ctrl[2] == 0)
602 if (ds1305->ctrl[0] & DS1305_WP) {
605 ds1305->ctrl[0] &= ~DS1305_WP;
608 buf[1] = ds1305->ctrl[0];
619 if (ds1305->ctrl[0] & DS1305_nEOSC) {
620 ds1305->ctrl[0] &= ~DS1305_nEOSC;
626 if (ds1305->ctrl[1]) {
627 ds1305->ctrl[1] = 0;
634 if (((ds1305->ctrl[2] & 0xf0) != DS1305_TRICKLE_MAGIC)) {
635 ds1305->ctrl[2] = DS1305_TRICKLE_MAGIC
643 if (!(ds1305->ctrl[0] & DS1306_1HZ)) {
644 ds1305->ctrl[0] |= DS1306_1HZ;
648 if (ds1305->ctrl[0] & DS1306_1HZ) {
649 ds1305->ctrl[0] &= ~DS1306_1HZ;
660 buf[1] = ds1305->ctrl[0];
661 buf[2] = ds1305->ctrl[1];
662 buf[3] = ds1305->ctrl[2];
670 dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "write", ds1305->ctrl);
682 ds1305->hr12 = (DS1305_HR_12 & value) != 0;
683 if (ds1305->hr12)
686 /* register RTC ... from here on, ds1305->ctrl needs locking */
687 ds1305->rtc = devm_rtc_allocate_device(&spi->dev);
688 if (IS_ERR(ds1305->rtc))
689 return PTR_ERR(ds1305->rtc);
691 ds1305->rtc->ops = &ds1305_ops;
692 ds1305->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
693 ds1305->rtc->range_max = RTC_TIMESTAMP_END_2099;
694 ds1305->rtc->alarm_offset_max = 24 * 60 * 60;
696 ds1305_nvmem_cfg.priv = ds1305;
697 status = devm_rtc_register_device(ds1305->rtc);
701 devm_rtc_nvmem_register(ds1305->rtc, &ds1305_nvmem_cfg);
710 INIT_WORK(&ds1305->work, ds1305_work);
712 0, dev_name(&ds1305->rtc->dev), ds1305);
726 struct ds1305 *ds1305 = spi_get_drvdata(spi);
730 set_bit(FLAG_EXITING, &ds1305->flags);
731 devm_free_irq(&spi->dev, spi->irq, ds1305);
732 cancel_work_sync(&ds1305->work);
737 .driver.name = "rtc-ds1305",
747 MODULE_ALIAS("spi:rtc-ds1305");