1 // SPDX-License-Identifier: GPL-2.0-or-later
11 #include <linux/rtc.h>
18 #include "rtc-sa1100.h"
20 #define RTC_DEF_DIVIDER		(32768 - 1)
25  * PXA Registers and bits definitions
30 #define RTSR_SWALE2	(1 << 11)	/* RTC stopwatch alarm2 enable */
31 #define RTSR_SWAL2	(1 << 10)	/* RTC stopwatch alarm2 detected */
32 #define RTSR_SWALE1	(1 << 9)	/* RTC stopwatch alarm1 enable */
33 #define RTSR_SWAL1	(1 << 8)	/* RTC stopwatch alarm1 detected */
34 #define RTSR_RDALE2	(1 << 7)	/* RTC alarm2 enable */
35 #define RTSR_RDAL2	(1 << 6)	/* RTC alarm2 detected */
36 #define RTSR_RDALE1	(1 << 5)	/* RTC alarm1 enable */
37 #define RTSR_RDAL1	(1 << 4)	/* RTC alarm1 detected */
39 #define RTSR_ALE	(1 << 2)	/* RTC alarm interrupt enable */
40 #define RTSR_HZ		(1 << 1)	/* HZ rising-edge detected */
41 #define RTSR_AL		(1 << 0)	/* RTC alarm detected */
69 	__raw_readl((pxa_rtc)->base + (reg))
71 	__raw_writel((value), (pxa_rtc)->base + (reg))
77 	struct rtc_device	*rtc;  member
84 	return ((tm->tm_year + 1900) << RYxR_YEAR_S)  in ryxr_calc()
85 		| ((tm->tm_mon + 1) << RYxR_MONTH_S)  in ryxr_calc()
86 		| tm->tm_mday;  in ryxr_calc()
91 	return ((((tm->tm_mday + 6) / 7) << RDxR_WOM_S) & RDxR_WOM_MASK)  in rdxr_calc()
92 		| (((tm->tm_wday + 1) << RDxR_DOW_S) & RDxR_DOW_MASK)  in rdxr_calc()
93 		| (tm->tm_hour << RDxR_HOUR_S)  in rdxr_calc()
94 		| (tm->tm_min << RDxR_MIN_S)  in rdxr_calc()
95 		| tm->tm_sec;  in rdxr_calc()
100 	tm->tm_year = ((rycr & RYxR_YEAR_MASK) >> RYxR_YEAR_S) - 1900;  in tm_calc()
101 	tm->tm_mon = (((rycr & RYxR_MONTH_MASK) >> RYxR_MONTH_S)) - 1;  in tm_calc()
102 	tm->tm_mday = (rycr & RYxR_DAY_MASK);  in tm_calc()
103 	tm->tm_wday = ((rycr & RDxR_DOW_MASK) >> RDxR_DOW_S) - 1;  in tm_calc()
104 	tm->tm_hour = (rdcr & RDxR_HOUR_MASK) >> RDxR_HOUR_S;  in tm_calc()
105 	tm->tm_min = (rdcr & RDxR_MIN_MASK) >> RDxR_MIN_S;  in tm_calc()
106 	tm->tm_sec = rdcr & RDxR_SEC_MASK;  in tm_calc()
135 	spin_lock(&pxa_rtc->lock);  in pxa_rtc_irq()
141 	/* temporary disable rtc interrupts */  in pxa_rtc_irq()
156 	rtc_update_irq(pxa_rtc->rtc, 1, events);  in pxa_rtc_irq()
158 	/* enable back rtc interrupts */  in pxa_rtc_irq()
161 	spin_unlock(&pxa_rtc->lock);  in pxa_rtc_irq()
170 	ret = request_irq(pxa_rtc->sa1100_rtc.irq_1hz, pxa_rtc_irq, 0,  in pxa_rtc_open()
171 			  "rtc 1Hz", dev);  in pxa_rtc_open()
174 			pxa_rtc->sa1100_rtc.irq_1hz, ret);  in pxa_rtc_open()
177 	ret = request_irq(pxa_rtc->sa1100_rtc.irq_alarm, pxa_rtc_irq, 0,  in pxa_rtc_open()
178 			  "rtc Alrm", dev);  in pxa_rtc_open()
181 			pxa_rtc->sa1100_rtc.irq_alarm, ret);  in pxa_rtc_open()
188 	free_irq(pxa_rtc->sa1100_rtc.irq_1hz, dev);  in pxa_rtc_open()
197 	spin_lock_irq(&pxa_rtc->lock);  in pxa_rtc_release()
199 	spin_unlock_irq(&pxa_rtc->lock);  in pxa_rtc_release()
201 	free_irq(pxa_rtc->sa1100_rtc.irq_1hz, dev);  in pxa_rtc_release()
202 	free_irq(pxa_rtc->sa1100_rtc.irq_alarm, dev);  in pxa_rtc_release()
209 	spin_lock_irq(&pxa_rtc->lock);  in pxa_alarm_irq_enable()
216 	spin_unlock_irq(&pxa_rtc->lock);  in pxa_alarm_irq_enable()
249 	tm_calc(ryar, rdar, &alrm->time);  in pxa_rtc_read_alarm()
252 	alrm->enabled = (rtsr & RTSR_RDALE1) ? 1 : 0;  in pxa_rtc_read_alarm()
253 	alrm->pending = (rtsr & RTSR_RDAL1) ? 1 : 0;  in pxa_rtc_read_alarm()
262 	spin_lock_irq(&pxa_rtc->lock);  in pxa_rtc_set_alarm()
264 	rtc_writel(pxa_rtc, RYAR1, ryxr_calc(&alrm->time));  in pxa_rtc_set_alarm()
265 	rtc_writel(pxa_rtc, RDAR1, rdxr_calc(&alrm->time));  in pxa_rtc_set_alarm()
268 	if (alrm->enabled)  in pxa_rtc_set_alarm()
274 	spin_unlock_irq(&pxa_rtc->lock);  in pxa_rtc_set_alarm()
304 	struct device *dev = &pdev->dev;  in pxa_rtc_probe()
311 		return -ENOMEM;  in pxa_rtc_probe()
312 	sa1100_rtc = &pxa_rtc->sa1100_rtc;  in pxa_rtc_probe()
314 	spin_lock_init(&pxa_rtc->lock);  in pxa_rtc_probe()
317 	pxa_rtc->ress = platform_get_resource(pdev, IORESOURCE_MEM, 0);  in pxa_rtc_probe()
318 	if (!pxa_rtc->ress) {  in pxa_rtc_probe()
320 		return -ENXIO;  in pxa_rtc_probe()
323 	sa1100_rtc->irq_1hz = platform_get_irq(pdev, 0);  in pxa_rtc_probe()
324 	if (sa1100_rtc->irq_1hz < 0)  in pxa_rtc_probe()
325 		return -ENXIO;  in pxa_rtc_probe()
326 	sa1100_rtc->irq_alarm = platform_get_irq(pdev, 1);  in pxa_rtc_probe()
327 	if (sa1100_rtc->irq_alarm < 0)  in pxa_rtc_probe()
328 		return -ENXIO;  in pxa_rtc_probe()
330 	sa1100_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);  in pxa_rtc_probe()
331 	if (IS_ERR(sa1100_rtc->rtc))  in pxa_rtc_probe()
332 		return PTR_ERR(sa1100_rtc->rtc);  in pxa_rtc_probe()
334 	pxa_rtc->base = devm_ioremap(dev, pxa_rtc->ress->start,  in pxa_rtc_probe()
335 				resource_size(pxa_rtc->ress));  in pxa_rtc_probe()
336 	if (!pxa_rtc->base) {  in pxa_rtc_probe()
337 		dev_err(dev, "Unable to map pxa RTC I/O memory\n");  in pxa_rtc_probe()
338 		return -ENOMEM;  in pxa_rtc_probe()
343 	sa1100_rtc->rcnr = pxa_rtc->base + 0x0;  in pxa_rtc_probe()
344 	sa1100_rtc->rtsr = pxa_rtc->base + 0x8;  in pxa_rtc_probe()
345 	sa1100_rtc->rtar = pxa_rtc->base + 0x4;  in pxa_rtc_probe()
346 	sa1100_rtc->rttr = pxa_rtc->base + 0xc;  in pxa_rtc_probe()
349 		dev_err(dev, "Unable to init SA1100 RTC sub-device\n");  in pxa_rtc_probe()
355 	pxa_rtc->rtc = devm_rtc_device_register(&pdev->dev, "pxa-rtc",  in pxa_rtc_probe()
357 	if (IS_ERR(pxa_rtc->rtc)) {  in pxa_rtc_probe()
358 		ret = PTR_ERR(pxa_rtc->rtc);  in pxa_rtc_probe()
359 		dev_err(dev, "Failed to register RTC device -> %d\n", ret);  in pxa_rtc_probe()
370 	struct device *dev = &pdev->dev;  in pxa_rtc_remove()
377 	{ .compatible = "marvell,pxa-rtc" },
389 		enable_irq_wake(pxa_rtc->sa1100_rtc.irq_alarm);  in pxa_rtc_suspend()
398 		disable_irq_wake(pxa_rtc->sa1100_rtc.irq_alarm);  in pxa_rtc_resume()
414 		.name	= "pxa-rtc",
423 MODULE_DESCRIPTION("PXA27x/PXA3xx Realtime Clock Driver (RTC)");
425 MODULE_ALIAS("platform:pxa-rtc");