86 #define rtt_readl(rtc, field) \  argument
87 	readl((rtc)->rtt + AT91_RTT_ ## field)
88 #define rtt_writel(rtc, field, val) \  argument
89 	writel((val), (rtc)->rtt + AT91_RTT_ ## field)
91 static inline unsigned int gpbr_readl(struct sam9_rtc *rtc)  in gpbr_readl()  argument
95 	regmap_read(rtc->gpbr, rtc->gpbr_offset, &val);  in gpbr_readl()
100 static inline void gpbr_writel(struct sam9_rtc *rtc, unsigned int val)  in gpbr_writel()  argument
102 	regmap_write(rtc->gpbr, rtc->gpbr_offset, val);  in gpbr_writel()
110 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_readtime()  local
115 	offset = gpbr_readl(rtc);  in at91_rtc_readtime()
120 	secs = rtt_readl(rtc, VR);  in at91_rtc_readtime()
121 	secs2 = rtt_readl(rtc, VR);  in at91_rtc_readtime()
123 		secs = rtt_readl(rtc, VR);  in at91_rtc_readtime()
139 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_settime()  local
152 	mr = rtt_readl(rtc, MR);  in at91_rtc_settime()
155 	rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));  in at91_rtc_settime()
158 	offset = gpbr_readl(rtc);  in at91_rtc_settime()
162 	gpbr_writel(rtc, secs);  in at91_rtc_settime()
165 	alarm = rtt_readl(rtc, AR);  in at91_rtc_settime()
178 		rtt_writel(rtc, AR, alarm);  in at91_rtc_settime()
182 	rtt_writel(rtc, MR, mr | AT91_RTT_RTTRST);  in at91_rtc_settime()
189 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_readalarm()  local
191 	u32 alarm = rtt_readl(rtc, AR);  in at91_rtc_readalarm()
194 	offset = gpbr_readl(rtc);  in at91_rtc_readalarm()
206 		if (rtt_readl(rtc, MR) & AT91_RTT_ALMIEN)  in at91_rtc_readalarm()
215 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_setalarm()  local
226 	offset = gpbr_readl(rtc);  in at91_rtc_setalarm()
231 	mr = rtt_readl(rtc, MR);  in at91_rtc_setalarm()
232 	rtt_writel(rtc, MR, mr & ~AT91_RTT_ALMIEN);  in at91_rtc_setalarm()
236 		rtt_writel(rtc, AR, ALARM_DISABLED);  in at91_rtc_setalarm()
241 	rtt_writel(rtc, AR, secs - offset);  in at91_rtc_setalarm()
243 		rtt_writel(rtc, MR, mr | AT91_RTT_ALMIEN);  in at91_rtc_setalarm()
254 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_alarm_irq_enable()  local
255 	u32 mr = rtt_readl(rtc, MR);  in at91_rtc_alarm_irq_enable()
259 		rtt_writel(rtc, MR, mr | AT91_RTT_ALMIEN);  in at91_rtc_alarm_irq_enable()
261 		rtt_writel(rtc, MR, mr & ~AT91_RTT_ALMIEN);  in at91_rtc_alarm_irq_enable()
270 	struct sam9_rtc *rtc = dev_get_drvdata(dev);  in at91_rtc_proc()  local
271 	u32 mr = mr = rtt_readl(rtc, MR);  in at91_rtc_proc()
278 static irqreturn_t at91_rtc_cache_events(struct sam9_rtc *rtc)  in at91_rtc_cache_events()  argument
285 	mr = rtt_readl(rtc, MR) & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);  in at91_rtc_cache_events()
286 	sr = rtt_readl(rtc, SR) & (mr >> 16);  in at91_rtc_cache_events()
292 		rtc->events |= (RTC_AF | RTC_IRQF);  in at91_rtc_cache_events()
296 		rtc->events |= (RTC_UF | RTC_IRQF);  in at91_rtc_cache_events()
301 static void at91_rtc_flush_events(struct sam9_rtc *rtc)  in at91_rtc_flush_events()  argument
303 	if (!rtc->events)  in at91_rtc_flush_events()
306 	rtc_update_irq(rtc->rtcdev, 1, rtc->events);  in at91_rtc_flush_events()
307 	rtc->events = 0;  in at91_rtc_flush_events()
310 		rtc->events >> 8, rtc->events & 0x000000FF);  in at91_rtc_flush_events()
318 	struct sam9_rtc *rtc = _rtc;  in at91_rtc_interrupt()  local
321 	spin_lock(&rtc->lock);  in at91_rtc_interrupt()
323 	ret = at91_rtc_cache_events(rtc);  in at91_rtc_interrupt()
326 	if (rtc->suspended) {  in at91_rtc_interrupt()
328 		rtt_writel(rtc, MR,  in at91_rtc_interrupt()
329 			   rtt_readl(rtc, MR) &  in at91_rtc_interrupt()
334 		at91_rtc_flush_events(rtc);  in at91_rtc_interrupt()
337 	spin_unlock(&rtc->lock);  in at91_rtc_interrupt()
363 	struct sam9_rtc	*rtc;  in at91_rtc_probe()  local
374 	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);  in at91_rtc_probe()
375 	if (!rtc)  in at91_rtc_probe()
378 	rtc->irq = irq;  in at91_rtc_probe()
384 	platform_set_drvdata(pdev, rtc);  in at91_rtc_probe()
387 	rtc->rtt = devm_ioremap_resource(&pdev->dev, r);  in at91_rtc_probe()
388 	if (IS_ERR(rtc->rtt))  in at91_rtc_probe()
389 		return PTR_ERR(rtc->rtt);  in at91_rtc_probe()
404 		rtc->gpbr = regmap_init_mmio(NULL, gpbr,  in at91_rtc_probe()
415 		rtc->gpbr = syscon_node_to_regmap(args.np);  in at91_rtc_probe()
416 		rtc->gpbr_offset = args.args[0];  in at91_rtc_probe()
419 	if (IS_ERR(rtc->gpbr)) {  in at91_rtc_probe()
424 	rtc->sclk = devm_clk_get(&pdev->dev, NULL);  in at91_rtc_probe()
425 	if (IS_ERR(rtc->sclk))  in at91_rtc_probe()
426 		return PTR_ERR(rtc->sclk);  in at91_rtc_probe()
428 	sclk_rate = clk_get_rate(rtc->sclk);  in at91_rtc_probe()
434 	ret = clk_prepare_enable(rtc->sclk);  in at91_rtc_probe()
440 	mr = rtt_readl(rtc, MR);  in at91_rtc_probe()
445 		gpbr_writel(rtc, 0);  in at91_rtc_probe()
450 	rtt_writel(rtc, MR, mr);  in at91_rtc_probe()
452 	rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name,  in at91_rtc_probe()
454 	if (IS_ERR(rtc->rtcdev))  in at91_rtc_probe()
455 		return PTR_ERR(rtc->rtcdev);  in at91_rtc_probe()
458 	ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt,  in at91_rtc_probe()
460 			       dev_name(&rtc->rtcdev->dev), rtc);  in at91_rtc_probe()
462 		dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq);  in at91_rtc_probe()
472 	if (gpbr_readl(rtc) == 0)  in at91_rtc_probe()
474 				dev_name(&rtc->rtcdev->dev));  in at91_rtc_probe()
484 	struct sam9_rtc	*rtc = platform_get_drvdata(pdev);  in at91_rtc_remove()  local
485 	u32		mr = rtt_readl(rtc, MR);  in at91_rtc_remove()
488 	rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));  in at91_rtc_remove()
490 	if (!IS_ERR(rtc->sclk))  in at91_rtc_remove()
491 		clk_disable_unprepare(rtc->sclk);  in at91_rtc_remove()
498 	struct sam9_rtc	*rtc = platform_get_drvdata(pdev);  in at91_rtc_shutdown()  local
499 	u32		mr = rtt_readl(rtc, MR);  in at91_rtc_shutdown()
501 	rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);  in at91_rtc_shutdown()
502 	rtt_writel(rtc, MR, mr & ~rtc->imr);  in at91_rtc_shutdown()
511 	struct sam9_rtc	*rtc = dev_get_drvdata(dev);  in at91_rtc_suspend()  local
512 	u32		mr = rtt_readl(rtc, MR);  in at91_rtc_suspend()
518 	rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);  in at91_rtc_suspend()
519 	if (rtc->imr) {  in at91_rtc_suspend()
523 			enable_irq_wake(rtc->irq);  in at91_rtc_suspend()
524 			spin_lock_irqsave(&rtc->lock, flags);  in at91_rtc_suspend()
525 			rtc->suspended = true;  in at91_rtc_suspend()
526 			spin_unlock_irqrestore(&rtc->lock, flags);  in at91_rtc_suspend()
529 				rtt_writel(rtc, MR, mr & ~AT91_RTT_RTTINCIEN);  in at91_rtc_suspend()
531 			rtt_writel(rtc, MR, mr & ~rtc->imr);  in at91_rtc_suspend()
539 	struct sam9_rtc	*rtc = dev_get_drvdata(dev);  in at91_rtc_resume()  local
542 	if (rtc->imr) {  in at91_rtc_resume()
546 			disable_irq_wake(rtc->irq);  in at91_rtc_resume()
547 		mr = rtt_readl(rtc, MR);  in at91_rtc_resume()
548 		rtt_writel(rtc, MR, mr | rtc->imr);  in at91_rtc_resume()
550 		spin_lock_irqsave(&rtc->lock, flags);  in at91_rtc_resume()
551 		rtc->suspended = false;  in at91_rtc_resume()
552 		at91_rtc_cache_events(rtc);  in at91_rtc_resume()
553 		at91_rtc_flush_events(rtc);  in at91_rtc_resume()
554 		spin_unlock_irqrestore(&rtc->lock, flags);  in at91_rtc_resume()