1 // SPDX-License-Identifier: GPL-2.0+
43 	__raw_readl((dev)->rtc_base + (reg))
45 	__raw_writel((val), (dev)->rtc_base + (reg))
72 	spin_lock_irq(&rtc->lock);  in lpc32xx_rtc_set_time()
78 	rtc_writel(rtc, LPC32XX_RTC_DCOUNT, 0xFFFFFFFF - secs);  in lpc32xx_rtc_set_time()
81 	spin_unlock_irq(&rtc->lock);  in lpc32xx_rtc_set_time()
91 	rtc_time64_to_tm(rtc_readl(rtc, LPC32XX_RTC_MATCH0), &wkalrm->time);  in lpc32xx_rtc_read_alarm()
92 	wkalrm->enabled = rtc->alarm_enabled;  in lpc32xx_rtc_read_alarm()
93 	wkalrm->pending = !!(rtc_readl(rtc, LPC32XX_RTC_INTSTAT) &  in lpc32xx_rtc_read_alarm()
96 	return rtc_valid_tm(&wkalrm->time);  in lpc32xx_rtc_read_alarm()
106 	alarmsecs = rtc_tm_to_time64(&wkalrm->time);  in lpc32xx_rtc_set_alarm()
108 	spin_lock_irq(&rtc->lock);  in lpc32xx_rtc_set_alarm()
116 	rtc->alarm_enabled = wkalrm->enabled;  in lpc32xx_rtc_set_alarm()
117 	if (wkalrm->enabled) {  in lpc32xx_rtc_set_alarm()
124 	spin_unlock_irq(&rtc->lock);  in lpc32xx_rtc_set_alarm()
135 	spin_lock_irq(&rtc->lock);  in lpc32xx_rtc_alarm_irq_enable()
139 		rtc->alarm_enabled = 1;  in lpc32xx_rtc_alarm_irq_enable()
142 		rtc->alarm_enabled = 0;  in lpc32xx_rtc_alarm_irq_enable()
147 	spin_unlock_irq(&rtc->lock);  in lpc32xx_rtc_alarm_irq_enable()
156 	spin_lock(&rtc->lock);  in lpc32xx_rtc_alarm_interrupt()
162 	rtc->alarm_enabled = 0;  in lpc32xx_rtc_alarm_interrupt()
171 	spin_unlock(&rtc->lock);  in lpc32xx_rtc_alarm_interrupt()
173 	rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);  in lpc32xx_rtc_alarm_interrupt()
192 	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);  in lpc32xx_rtc_probe()
194 		return -ENOMEM;  in lpc32xx_rtc_probe()
196 	rtc->rtc_base = devm_platform_ioremap_resource(pdev, 0);  in lpc32xx_rtc_probe()
197 	if (IS_ERR(rtc->rtc_base))  in lpc32xx_rtc_probe()
198 		return PTR_ERR(rtc->rtc_base);  in lpc32xx_rtc_probe()
200 	spin_lock_init(&rtc->lock);  in lpc32xx_rtc_probe()
225 		/* Write key value to RTC so it won't reload on reset */  in lpc32xx_rtc_probe()
235 	rtc->rtc = devm_rtc_allocate_device(&pdev->dev);  in lpc32xx_rtc_probe()
236 	if (IS_ERR(rtc->rtc))  in lpc32xx_rtc_probe()
237 		return PTR_ERR(rtc->rtc);  in lpc32xx_rtc_probe()
239 	rtc->rtc->ops = &lpc32xx_rtc_ops;  in lpc32xx_rtc_probe()
240 	rtc->rtc->range_max = U32_MAX;  in lpc32xx_rtc_probe()
242 	err = devm_rtc_register_device(rtc->rtc);  in lpc32xx_rtc_probe()
250 	rtc->irq = platform_get_irq(pdev, 0);  in lpc32xx_rtc_probe()
251 	if (rtc->irq < 0) {  in lpc32xx_rtc_probe()
252 		dev_warn(&pdev->dev, "Can't get interrupt resource\n");  in lpc32xx_rtc_probe()
254 		if (devm_request_irq(&pdev->dev, rtc->irq,  in lpc32xx_rtc_probe()
256 				     0, pdev->name, rtc) < 0) {  in lpc32xx_rtc_probe()
257 			dev_warn(&pdev->dev, "Can't request interrupt.\n");  in lpc32xx_rtc_probe()
258 			rtc->irq = -1;  in lpc32xx_rtc_probe()
260 			device_init_wakeup(&pdev->dev, true);  in lpc32xx_rtc_probe()
272 	if (rtc->irq >= 0) {  in lpc32xx_rtc_suspend()
274 			enable_irq_wake(rtc->irq);  in lpc32xx_rtc_suspend()
276 			disable_irq_wake(rtc->irq);  in lpc32xx_rtc_suspend()
286 	if (rtc->irq >= 0 && device_may_wakeup(dev))  in lpc32xx_rtc_resume()
287 		disable_irq_wake(rtc->irq);  in lpc32xx_rtc_resume()
297 	spin_lock_irq(&rtc->lock);  in lpc32xx_rtc_freeze()
303 	spin_unlock_irq(&rtc->lock);  in lpc32xx_rtc_freeze()
312 	if (rtc->alarm_enabled) {  in lpc32xx_rtc_thaw()
313 		spin_lock_irq(&rtc->lock);  in lpc32xx_rtc_thaw()
319 		spin_unlock_irq(&rtc->lock);  in lpc32xx_rtc_thaw()
340 	{ .compatible = "nxp,lpc3220-rtc" },
349 		.name	= "rtc-lpc32xx",
360 MODULE_ALIAS("platform:rtc-lpc32xx");