Cross Reference: /drivers/rtc/rtc-ds1305.c

Lines Matching defs:ds1305
2  * rtc-ds1305.c -- driver for DS1305 and DS1306 SPI RTC chips
19 #include <linux/spi/ds1305.h>
80 /* trickle bits are defined in <linux/spi/ds1305.h> */
88 struct ds1305 {
145 	struct ds1305	*ds1305 = dev_get_drvdata(dev);
150 	buf[1] = ds1305->ctrl[0];
153 		if (ds1305->ctrl[0] & DS1305_AEI0)
161 	err = spi_write_then_read(ds1305->spi, buf, sizeof(buf), NULL, 0);
163 		ds1305->ctrl[0] = buf[1];
176 	struct ds1305	*ds1305 = dev_get_drvdata(dev);
184 	status = spi_write_then_read(ds1305->spi, &addr, sizeof(addr),
214 	struct ds1305	*ds1305 = dev_get_drvdata(dev);
229 	*bp++ = hour2bcd(ds1305->hr12, time->tm_hour);
240 	return spi_write_then_read(ds1305->spi, buf, sizeof(buf),
273  * Context: caller holds rtc->ops_lock (to protect ds1305->ctrl)
277 	struct ds1305	*ds1305 = dev_get_drvdata(dev);
278 	struct spi_device *spi = ds1305->spi;
290 			ds1305->ctrl, sizeof(ds1305->ctrl));
294 	alm->enabled = !!(ds1305->ctrl[0] & DS1305_AEI0);
295 	alm->pending = !!(ds1305->ctrl[1] & DS1305_AEI0);
332  * Context: caller holds rtc->ops_lock (to protect ds1305->ctrl)
336 	struct ds1305	*ds1305 = dev_get_drvdata(dev);
337 	struct spi_device *spi = ds1305->spi;
363 	if (ds1305->ctrl[0] & DS1305_AEI0) {
364 		ds1305->ctrl[0] &= ~DS1305_AEI0;
367 		buf[1] = ds1305->ctrl[0];
368 		status = spi_write_then_read(ds1305->spi, buf, 2, NULL, 0);
377 	buf[1 + DS1305_HOUR] = hour2bcd(ds1305->hr12, alm->time.tm_hour);
390 		ds1305->ctrl[0] |= DS1305_AEI0;
393 		buf[1] = ds1305->ctrl[0];
394 		status = spi_write_then_read(ds1305->spi, buf, 2, NULL, 0);
404 	struct ds1305	*ds1305 = dev_get_drvdata(dev);
409 	if ((ds1305->ctrl[2] & 0xf0) == DS1305_TRICKLE_MAGIC) {
410 		switch (ds1305->ctrl[2] & 0x0c) {
420 		switch (ds1305->ctrl[2] & 0x03) {
457 	struct ds1305	*ds1305 = container_of(work, struct ds1305, work);
458 	struct mutex	*lock = &ds1305->rtc->ops_lock;
459 	struct spi_device *spi = ds1305->spi;
463 	/* lock to protect ds1305->ctrl */
470 	ds1305->ctrl[0] &= ~(DS1305_AEI1 | DS1305_AEI0);
471 	ds1305->ctrl[1] = 0;
474 	buf[1] = ds1305->ctrl[0];
484 	if (!test_bit(FLAG_EXITING, &ds1305->flags))
487 	rtc_update_irq(ds1305->rtc, 1, RTC_AF | RTC_IRQF);
492  * mutex locking for ds1305->ctrl ... unlike I2C, we could issue async
497 	struct ds1305		*ds1305 = p;
500 	schedule_work(&ds1305->work);
606 	struct ds1305			*ds1305;
622 	ds1305 = devm_kzalloc(&spi->dev, sizeof(*ds1305), GFP_KERNEL);
623 	if (!ds1305)
625 	ds1305->spi = spi;
626 	spi_set_drvdata(spi, ds1305);
631 			ds1305->ctrl, sizeof(ds1305->ctrl));
638 	dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "read", ds1305->ctrl);
645 	if ((ds1305->ctrl[0] & 0x38) != 0 || (ds1305->ctrl[1] & 0xfc) != 0) {
649 	if (ds1305->ctrl[2] == 0)
655 	if (ds1305->ctrl[0] & DS1305_WP) {
658 		ds1305->ctrl[0] &= ~DS1305_WP;
661 		buf[1] = ds1305->ctrl[0];
672 	if (ds1305->ctrl[0] & DS1305_nEOSC) {
673 		ds1305->ctrl[0] &= ~DS1305_nEOSC;
679 	if (ds1305->ctrl[1]) {
680 		ds1305->ctrl[1] = 0;
687 		if (((ds1305->ctrl[2] & 0xf0) != DS1305_TRICKLE_MAGIC)) {
688 			ds1305->ctrl[2] = DS1305_TRICKLE_MAGIC
696 				if (!(ds1305->ctrl[0] & DS1306_1HZ)) {
697 					ds1305->ctrl[0] |= DS1306_1HZ;
701 				if (ds1305->ctrl[0] & DS1306_1HZ) {
702 					ds1305->ctrl[0] &= ~DS1306_1HZ;
713 		buf[1] = ds1305->ctrl[0];
714 		buf[2] = ds1305->ctrl[1];
715 		buf[3] = ds1305->ctrl[2];
723 		dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "write", ds1305->ctrl);
735 	ds1305->hr12 = (DS1305_HR_12 & value) != 0;
736 	if (ds1305->hr12)
739 	/* register RTC ... from here on, ds1305->ctrl needs locking */
740 	ds1305->rtc = devm_rtc_device_register(&spi->dev, "ds1305",
742 	if (IS_ERR(ds1305->rtc)) {
743 		status = PTR_ERR(ds1305->rtc);
755 		INIT_WORK(&ds1305->work, ds1305_work);
757 				0, dev_name(&ds1305->rtc->dev), ds1305);
777 	struct ds1305 *ds1305 = spi_get_drvdata(spi);
783 		set_bit(FLAG_EXITING, &ds1305->flags);
784 		devm_free_irq(&spi->dev, spi->irq, ds1305);
785 		cancel_work_sync(&ds1305->work);
792 	.driver.name	= "rtc-ds1305",
803 MODULE_ALIAS("spi:rtc-ds1305");