53 static void st_rtc_set_hw_alarm(struct st_rtc *rtc,  in st_rtc_set_hw_alarm()  argument
58 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_set_hw_alarm()
60 	writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_set_hw_alarm()
62 	writel_relaxed(msb, rtc->ioaddr + LPC_LPA_MSB_OFF);  in st_rtc_set_hw_alarm()
63 	writel_relaxed(lsb, rtc->ioaddr + LPC_LPA_LSB_OFF);  in st_rtc_set_hw_alarm()
64 	writel_relaxed(1, rtc->ioaddr + LPC_LPA_START_OFF);  in st_rtc_set_hw_alarm()
66 	writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_set_hw_alarm()
68 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_set_hw_alarm()
73 	struct st_rtc *rtc = (struct st_rtc *)data;  in st_rtc_handler()  local
75 	rtc_update_irq(rtc->rtc_dev, 1, RTC_AF);  in st_rtc_handler()
82 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_read_time()  local
87 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_read_time()
90 		lpt_msb = readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF);  in st_rtc_read_time()
91 		lpt_lsb = readl_relaxed(rtc->ioaddr + LPC_LPT_LSB_OFF);  in st_rtc_read_time()
92 	} while (readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF) != lpt_msb);  in st_rtc_read_time()
94 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_read_time()
97 	do_div(lpt, rtc->clkrate);  in st_rtc_read_time()
105 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_set_time()  local
111 	lpt = (unsigned long long)secs * rtc->clkrate;  in st_rtc_set_time()
113 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_set_time()
115 	writel_relaxed(lpt >> 32, rtc->ioaddr + LPC_LPT_MSB_OFF);  in st_rtc_set_time()
116 	writel_relaxed(lpt, rtc->ioaddr + LPC_LPT_LSB_OFF);  in st_rtc_set_time()
117 	writel_relaxed(1, rtc->ioaddr + LPC_LPT_START_OFF);  in st_rtc_set_time()
119 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_set_time()
126 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_read_alarm()  local
129 	spin_lock_irqsave(&rtc->lock, flags);  in st_rtc_read_alarm()
131 	memcpy(wkalrm, &rtc->alarm, sizeof(struct rtc_wkalrm));  in st_rtc_read_alarm()
133 	spin_unlock_irqrestore(&rtc->lock, flags);  in st_rtc_read_alarm()
140 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_alarm_irq_enable()  local
142 	if (enabled && !rtc->irq_enabled) {  in st_rtc_alarm_irq_enable()
143 		enable_irq(rtc->irq);  in st_rtc_alarm_irq_enable()
144 		rtc->irq_enabled = true;  in st_rtc_alarm_irq_enable()
145 	} else if (!enabled && rtc->irq_enabled) {  in st_rtc_alarm_irq_enable()
146 		disable_irq(rtc->irq);  in st_rtc_alarm_irq_enable()
147 		rtc->irq_enabled = false;  in st_rtc_alarm_irq_enable()
155 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_set_alarm()  local
165 	memcpy(&rtc->alarm, t, sizeof(struct rtc_wkalrm));  in st_rtc_set_alarm()
169 	lpa = (unsigned long long)alarm_secs * rtc->clkrate;  in st_rtc_set_alarm()
171 	st_rtc_set_hw_alarm(rtc, lpa >> 32, lpa);  in st_rtc_set_alarm()
188 	struct st_rtc *rtc;  in st_rtc_probe()  local
203 	rtc = devm_kzalloc(&pdev->dev, sizeof(struct st_rtc), GFP_KERNEL);  in st_rtc_probe()
204 	if (!rtc)  in st_rtc_probe()
207 	rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);  in st_rtc_probe()
208 	if (IS_ERR(rtc->rtc_dev))  in st_rtc_probe()
209 		return PTR_ERR(rtc->rtc_dev);  in st_rtc_probe()
211 	spin_lock_init(&rtc->lock);  in st_rtc_probe()
214 	rtc->ioaddr = devm_ioremap_resource(&pdev->dev, res);  in st_rtc_probe()
215 	if (IS_ERR(rtc->ioaddr))  in st_rtc_probe()
216 		return PTR_ERR(rtc->ioaddr);  in st_rtc_probe()
218 	rtc->irq = irq_of_parse_and_map(np, 0);  in st_rtc_probe()
219 	if (!rtc->irq) {  in st_rtc_probe()
224 	ret = devm_request_irq(&pdev->dev, rtc->irq, st_rtc_handler, 0,  in st_rtc_probe()
225 			       pdev->name, rtc);  in st_rtc_probe()
227 		dev_err(&pdev->dev, "Failed to request irq %i\n", rtc->irq);  in st_rtc_probe()
231 	enable_irq_wake(rtc->irq);  in st_rtc_probe()
232 	disable_irq(rtc->irq);  in st_rtc_probe()
234 	rtc->clk = clk_get(&pdev->dev, NULL);  in st_rtc_probe()
235 	if (IS_ERR(rtc->clk)) {  in st_rtc_probe()
237 		return PTR_ERR(rtc->clk);  in st_rtc_probe()
240 	clk_prepare_enable(rtc->clk);  in st_rtc_probe()
242 	rtc->clkrate = clk_get_rate(rtc->clk);  in st_rtc_probe()
243 	if (!rtc->clkrate) {  in st_rtc_probe()
250 	platform_set_drvdata(pdev, rtc);  in st_rtc_probe()
252 	rtc->rtc_dev->ops = &st_rtc_ops;  in st_rtc_probe()
253 	rtc->rtc_dev->range_max = U64_MAX;  in st_rtc_probe()
254 	do_div(rtc->rtc_dev->range_max, rtc->clkrate);  in st_rtc_probe()
256 	ret = rtc_register_device(rtc->rtc_dev);  in st_rtc_probe()
258 		clk_disable_unprepare(rtc->clk);  in st_rtc_probe()
268 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_suspend()  local
273 	writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_suspend()
274 	writel_relaxed(0, rtc->ioaddr + LPC_LPA_START_OFF);  in st_rtc_suspend()
275 	writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_suspend()
282 	struct st_rtc *rtc = dev_get_drvdata(dev);  in st_rtc_resume()  local
284 	rtc_alarm_irq_enable(rtc->rtc_dev, 0);  in st_rtc_resume()
290 	memset(&rtc->alarm, 0, sizeof(struct rtc_wkalrm));  in st_rtc_resume()
292 	writel_relaxed(0, rtc->ioaddr + LPC_LPA_MSB_OFF);  in st_rtc_resume()
293 	writel_relaxed(0, rtc->ioaddr + LPC_LPA_LSB_OFF);  in st_rtc_resume()
294 	writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_resume()
295 	writel_relaxed(1, rtc->ioaddr + LPC_LPA_START_OFF);  in st_rtc_resume()
296 	writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF);  in st_rtc_resume()