81 #define rtt_readl(rtc, field) \  argument
82 	readl((rtc)->rtt + AT91_RTT_ ## field)
83 #define rtt_writel(rtc, field, val) \  argument
84 	writel((val), (rtc)->rtt + AT91_RTT_ ## field)
86 static inline unsigned int gpbr_readl(struct sam9_rtc *rtc)  in gpbr_readl()  argument
90 	regmap_read(rtc->gpbr, rtc->gpbr_offset, &val);  in gpbr_readl()
95 static inline void gpbr_writel(struct sam9_rtc *rtc, unsigned int val)  in gpbr_writel()  argument
97 	regmap_write(rtc->gpbr, rtc->gpbr_offset, val);  in gpbr_writel()
105 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_readtime()  local
110 	offset = gpbr_readl(rtc);  in at91_rtc_readtime()
115 	secs = rtt_readl(rtc, VR);  in at91_rtc_readtime()
116 	secs2 = rtt_readl(rtc, VR);  in at91_rtc_readtime()
118 		secs = rtt_readl(rtc, VR);  in at91_rtc_readtime()
132 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_settime()  local
140 	mr = rtt_readl(rtc, MR);  in at91_rtc_settime()
143 	rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));  in at91_rtc_settime()
146 	offset = gpbr_readl(rtc);  in at91_rtc_settime()
150 	gpbr_writel(rtc, secs);  in at91_rtc_settime()
153 	alarm = rtt_readl(rtc, AR);  in at91_rtc_settime()
166 		rtt_writel(rtc, AR, alarm);  in at91_rtc_settime()
170 	rtt_writel(rtc, MR, mr | AT91_RTT_RTTRST);  in at91_rtc_settime()
177 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_readalarm()  local
179 	u32 alarm = rtt_readl(rtc, AR);  in at91_rtc_readalarm()
182 	offset = gpbr_readl(rtc);  in at91_rtc_readalarm()
192 		if (rtt_readl(rtc, MR) & AT91_RTT_ALMIEN)  in at91_rtc_readalarm()
201 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_setalarm()  local
209 	offset = gpbr_readl(rtc);  in at91_rtc_setalarm()
214 	mr = rtt_readl(rtc, MR);  in at91_rtc_setalarm()
215 	rtt_writel(rtc, MR, mr & ~AT91_RTT_ALMIEN);  in at91_rtc_setalarm()
219 		rtt_writel(rtc, AR, ALARM_DISABLED);  in at91_rtc_setalarm()
224 	rtt_writel(rtc, AR, secs - offset);  in at91_rtc_setalarm()
226 		rtt_writel(rtc, MR, mr | AT91_RTT_ALMIEN);  in at91_rtc_setalarm()
235 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_alarm_irq_enable()  local
236 	u32 mr = rtt_readl(rtc, MR);  in at91_rtc_alarm_irq_enable()
240 		rtt_writel(rtc, MR, mr | AT91_RTT_ALMIEN);  in at91_rtc_alarm_irq_enable()
242 		rtt_writel(rtc, MR, mr & ~AT91_RTT_ALMIEN);  in at91_rtc_alarm_irq_enable()
251 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_proc()  local
252 	u32 mr = rtt_readl(rtc, MR);  in at91_rtc_proc()
259 static irqreturn_t at91_rtc_cache_events(struct sam9_rtc *rtc)  in at91_rtc_cache_events()  argument
266 	mr = rtt_readl(rtc, MR) & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);  in at91_rtc_cache_events()
267 	sr = rtt_readl(rtc, SR) & (mr >> 16);  in at91_rtc_cache_events()
273 		rtc->events |= (RTC_AF | RTC_IRQF);  in at91_rtc_cache_events()
277 		rtc->events |= (RTC_UF | RTC_IRQF);  in at91_rtc_cache_events()
282 static void at91_rtc_flush_events(struct sam9_rtc *rtc)  in at91_rtc_flush_events()  argument
284 	if (!rtc->events)  in at91_rtc_flush_events()
287 	rtc_update_irq(rtc->rtcdev, 1, rtc->events);  in at91_rtc_flush_events()
288 	rtc->events = 0;  in at91_rtc_flush_events()
291 		 rtc->events >> 8, rtc->events & 0x000000FF);  in at91_rtc_flush_events()
299 	struct sam9_rtc *rtc = _rtc;  in at91_rtc_interrupt()  local
302 	spin_lock(&rtc->lock);  in at91_rtc_interrupt()
304 	ret = at91_rtc_cache_events(rtc);  in at91_rtc_interrupt()
307 	if (rtc->suspended) {  in at91_rtc_interrupt()
309 		rtt_writel(rtc, MR,  in at91_rtc_interrupt()
310 			   rtt_readl(rtc, MR) &  in at91_rtc_interrupt()
315 		at91_rtc_flush_events(rtc);  in at91_rtc_interrupt()
318 	spin_unlock(&rtc->lock);  in at91_rtc_interrupt()
337 	struct sam9_rtc	*rtc;  in at91_rtc_probe()  local
347 	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);  in at91_rtc_probe()
348 	if (!rtc)  in at91_rtc_probe()
351 	spin_lock_init(&rtc->lock);  in at91_rtc_probe()
352 	rtc->irq = irq;  in at91_rtc_probe()
358 	platform_set_drvdata(pdev, rtc);  in at91_rtc_probe()
360 	rtc->rtt = devm_platform_ioremap_resource(pdev, 0);  in at91_rtc_probe()
361 	if (IS_ERR(rtc->rtt))  in at91_rtc_probe()
362 		return PTR_ERR(rtc->rtt);  in at91_rtc_probe()
370 	rtc->gpbr = syscon_node_to_regmap(args.np);  in at91_rtc_probe()
371 	rtc->gpbr_offset = args.args[0];  in at91_rtc_probe()
372 	if (IS_ERR(rtc->gpbr)) {  in at91_rtc_probe()
377 	rtc->sclk = devm_clk_get(&pdev->dev, NULL);  in at91_rtc_probe()
378 	if (IS_ERR(rtc->sclk))  in at91_rtc_probe()
379 		return PTR_ERR(rtc->sclk);  in at91_rtc_probe()
381 	ret = clk_prepare_enable(rtc->sclk);  in at91_rtc_probe()
387 	sclk_rate = clk_get_rate(rtc->sclk);  in at91_rtc_probe()
394 	mr = rtt_readl(rtc, MR);  in at91_rtc_probe()
399 		gpbr_writel(rtc, 0);  in at91_rtc_probe()
404 	rtt_writel(rtc, MR, mr);  in at91_rtc_probe()
406 	rtc->rtcdev = devm_rtc_allocate_device(&pdev->dev);  in at91_rtc_probe()
407 	if (IS_ERR(rtc->rtcdev)) {  in at91_rtc_probe()
408 		ret = PTR_ERR(rtc->rtcdev);  in at91_rtc_probe()
412 	rtc->rtcdev->ops = &at91_rtc_ops;  in at91_rtc_probe()
413 	rtc->rtcdev->range_max = U32_MAX;  in at91_rtc_probe()
416 	ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt,  in at91_rtc_probe()
418 			       dev_name(&rtc->rtcdev->dev), rtc);  in at91_rtc_probe()
420 		dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq);  in at91_rtc_probe()
430 	if (gpbr_readl(rtc) == 0)  in at91_rtc_probe()
432 			 dev_name(&rtc->rtcdev->dev));  in at91_rtc_probe()
434 	return devm_rtc_register_device(rtc->rtcdev);  in at91_rtc_probe()
437 	clk_disable_unprepare(rtc->sclk);  in at91_rtc_probe()
447 	struct sam9_rtc	*rtc = platform_get_drvdata(pdev);  in at91_rtc_remove()  local
448 	u32		mr = rtt_readl(rtc, MR);  in at91_rtc_remove()
451 	rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));  in at91_rtc_remove()
453 	clk_disable_unprepare(rtc->sclk);  in at91_rtc_remove()
458 	struct sam9_rtc	*rtc = platform_get_drvdata(pdev);  in at91_rtc_shutdown()  local
459 	u32		mr = rtt_readl(rtc, MR);  in at91_rtc_shutdown()
461 	rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);  in at91_rtc_shutdown()
462 	rtt_writel(rtc, MR, mr & ~rtc->imr);  in at91_rtc_shutdown()
471 	struct sam9_rtc	*rtc = dev_get_drvdata(dev);  in at91_rtc_suspend()  local
472 	u32		mr = rtt_readl(rtc, MR);  in at91_rtc_suspend()
478 	rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);  in at91_rtc_suspend()
479 	if (rtc->imr) {  in at91_rtc_suspend()
483 			enable_irq_wake(rtc->irq);  in at91_rtc_suspend()
484 			spin_lock_irqsave(&rtc->lock, flags);  in at91_rtc_suspend()
485 			rtc->suspended = true;  in at91_rtc_suspend()
486 			spin_unlock_irqrestore(&rtc->lock, flags);  in at91_rtc_suspend()
489 				rtt_writel(rtc, MR, mr & ~AT91_RTT_RTTINCIEN);  in at91_rtc_suspend()
491 			rtt_writel(rtc, MR, mr & ~rtc->imr);  in at91_rtc_suspend()
500 	struct sam9_rtc	*rtc = dev_get_drvdata(dev);  in at91_rtc_resume()  local
503 	if (rtc->imr) {  in at91_rtc_resume()
507 			disable_irq_wake(rtc->irq);  in at91_rtc_resume()
508 		mr = rtt_readl(rtc, MR);  in at91_rtc_resume()
509 		rtt_writel(rtc, MR, mr | rtc->imr);  in at91_rtc_resume()
511 		spin_lock_irqsave(&rtc->lock, flags);  in at91_rtc_resume()
512 		rtc->suspended = false;  in at91_rtc_resume()
513 		at91_rtc_cache_events(rtc);  in at91_rtc_resume()
514 		at91_rtc_flush_events(rtc);  in at91_rtc_resume()
515 		spin_unlock_irqrestore(&rtc->lock, flags);  in at91_rtc_resume()