57 static void st_rtc_set_hw_alarm(struct st_rtc *rtc,  in st_rtc_set_hw_alarm()  argument
62 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_set_hw_alarm()
64 	writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_set_hw_alarm()
66 	writel_relaxed(msb, rtc->ioaddr + LPC_LPA_MSB_OFF);  in st_rtc_set_hw_alarm()
67 	writel_relaxed(lsb, rtc->ioaddr + LPC_LPA_LSB_OFF);  in st_rtc_set_hw_alarm()
68 	writel_relaxed(1, rtc->ioaddr + LPC_LPA_START_OFF);  in st_rtc_set_hw_alarm()
70 	writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_set_hw_alarm()
72 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_set_hw_alarm()
77 	struct st_rtc *rtc = (struct st_rtc *)data;  in st_rtc_handler()  local
79 	rtc_update_irq(rtc->rtc_dev, 1, RTC_AF);  in st_rtc_handler()
86 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_read_time()  local
91 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_read_time()
94 		lpt_msb = readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF);  in st_rtc_read_time()
95 		lpt_lsb = readl_relaxed(rtc->ioaddr + LPC_LPT_LSB_OFF);  in st_rtc_read_time()
96 	} while (readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF) != lpt_msb);  in st_rtc_read_time()
98 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_read_time()
101 	do_div(lpt, rtc->clkrate);  in st_rtc_read_time()
109 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_set_time()  local
118 	lpt = (unsigned long long)secs * rtc->clkrate;  in st_rtc_set_time()
120 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_set_time()
122 	writel_relaxed(lpt >> 32, rtc->ioaddr + LPC_LPT_MSB_OFF);  in st_rtc_set_time()
123 	writel_relaxed(lpt, rtc->ioaddr + LPC_LPT_LSB_OFF);  in st_rtc_set_time()
124 	writel_relaxed(1, rtc->ioaddr + LPC_LPT_START_OFF);  in st_rtc_set_time()
126 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_set_time()
133 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_read_alarm()  local
136 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_read_alarm()
138 	memcpy(wkalrm, &rtc->alarm, sizeof(struct rtc_wkalrm));  in st_rtc_read_alarm()
140 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_read_alarm()
147 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_alarm_irq_enable()  local
149 	if (enabled && !rtc->irq_enabled) {  in st_rtc_alarm_irq_enable()
150 		enable_irq(rtc->irq);  in st_rtc_alarm_irq_enable()
151 		rtc->irq_enabled = true;  in st_rtc_alarm_irq_enable()
152 	} else if (!enabled && rtc->irq_enabled) {  in st_rtc_alarm_irq_enable()
153 		disable_irq(rtc->irq);  in st_rtc_alarm_irq_enable()
154 		rtc->irq_enabled = false;  in st_rtc_alarm_irq_enable()
162 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_set_alarm()  local
176 	memcpy(&rtc->alarm, t, sizeof(struct rtc_wkalrm));  in st_rtc_set_alarm()
180 	lpa = (unsigned long long)alarm_secs * rtc->clkrate;  in st_rtc_set_alarm()
182 	st_rtc_set_hw_alarm(rtc, lpa >> 32, lpa);  in st_rtc_set_alarm()
199 	struct st_rtc *rtc;  in st_rtc_probe()  local
215 	rtc = devm_kzalloc(&pdev->dev, sizeof(struct st_rtc), GFP_KERNEL);  in st_rtc_probe()
216 	if (!rtc)  in st_rtc_probe()
219 	spin_lock_init(&rtc->lock);  in st_rtc_probe()
222 	rtc->ioaddr = devm_ioremap_resource(&pdev->dev, res);  in st_rtc_probe()
223 	if (IS_ERR(rtc->ioaddr))  in st_rtc_probe()
224 		return PTR_ERR(rtc->ioaddr);  in st_rtc_probe()
226 	rtc->irq = irq_of_parse_and_map(np, 0);  in st_rtc_probe()
227 	if (!rtc->irq) {  in st_rtc_probe()
232 	ret = devm_request_irq(&pdev->dev, rtc->irq, st_rtc_handler, 0,  in st_rtc_probe()
233 			       pdev->name, rtc);  in st_rtc_probe()
235 		dev_err(&pdev->dev, "Failed to request irq %i\n", rtc->irq);  in st_rtc_probe()
239 	enable_irq_wake(rtc->irq);  in st_rtc_probe()
240 	disable_irq(rtc->irq);  in st_rtc_probe()
242 	rtc->clk = clk_get(&pdev->dev, NULL);  in st_rtc_probe()
243 	if (IS_ERR(rtc->clk)) {  in st_rtc_probe()
245 		return PTR_ERR(rtc->clk);  in st_rtc_probe()
248 	clk_prepare_enable(rtc->clk);  in st_rtc_probe()
250 	rtc->clkrate = clk_get_rate(rtc->clk);  in st_rtc_probe()
251 	if (!rtc->clkrate) {  in st_rtc_probe()
258 	platform_set_drvdata(pdev, rtc);  in st_rtc_probe()
275 	rtc->rtc_dev = rtc_device_register("st-lpc-rtc", &pdev->dev,  in st_rtc_probe()
277 	if (IS_ERR(rtc->rtc_dev)) {  in st_rtc_probe()
278 		clk_disable_unprepare(rtc->clk);  in st_rtc_probe()
279 		return PTR_ERR(rtc->rtc_dev);  in st_rtc_probe()
287 	struct st_rtc *rtc = platform_get_drvdata(pdev);  in st_rtc_remove()  local
289 	if (likely(rtc->rtc_dev))  in st_rtc_remove()
290 		rtc_device_unregister(rtc->rtc_dev);  in st_rtc_remove()
298 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_suspend()  local
303 	writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_suspend()
304 	writel_relaxed(0, rtc->ioaddr + LPC_LPA_START_OFF);  in st_rtc_suspend()
305 	writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_suspend()
312 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_resume()  local
314 	rtc_alarm_irq_enable(rtc->rtc_dev, 0);  in st_rtc_resume()
320 	memset(&rtc->alarm, 0, sizeof(struct rtc_wkalrm));  in st_rtc_resume()
322 	writel_relaxed(0, rtc->ioaddr + LPC_LPA_MSB_OFF);  in st_rtc_resume()
323 	writel_relaxed(0, rtc->ioaddr + LPC_LPA_LSB_OFF);  in st_rtc_resume()
324 	writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_resume()
325 	writel_relaxed(1, rtc->ioaddr + LPC_LPA_START_OFF);  in st_rtc_resume()
326 	writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_resume()