15 #include <linux/rtc.h>
41 static int dc_rtc_cmds(struct dc_rtc *rtc, const u8 *cmds, int len)  in dc_rtc_cmds()  argument
48 			       rtc->regs + DC_RTC_CONTROL);  in dc_rtc_cmds()
50 			rtc->regs + DC_RTC_CONTROL, val,  in dc_rtc_cmds()
59 static int dc_rtc_read(struct dc_rtc *rtc, unsigned long *val)  in dc_rtc_read()  argument
65 	ret = dc_rtc_cmds(rtc, read_cmds, ARRAY_SIZE(read_cmds));  in dc_rtc_read()
69 	reference = readl_relaxed(rtc->regs + DC_RTC_REFERENCE);  in dc_rtc_read()
70 	time1 = readl_relaxed(rtc->regs + DC_RTC_TIME);  in dc_rtc_read()
73 		time2 = readl_relaxed(rtc->regs + DC_RTC_TIME);  in dc_rtc_read()
83 static int dc_rtc_write(struct dc_rtc *rtc, u32 val)  in dc_rtc_write()  argument
87 	writel_relaxed(val, rtc->regs + DC_RTC_REFERENCE);  in dc_rtc_write()
88 	return dc_rtc_cmds(rtc, write_cmds, ARRAY_SIZE(write_cmds));  in dc_rtc_write()
93 	struct dc_rtc *rtc = dev_get_drvdata(dev);  in dc_rtc_read_time()  local
97 	ret = dc_rtc_read(rtc, &now);  in dc_rtc_read_time()
107 	struct dc_rtc *rtc = dev_get_drvdata(dev);  in dc_rtc_set_time()  local
109 	return dc_rtc_write(rtc, rtc_tm_to_time64(tm));  in dc_rtc_set_time()
114 	struct dc_rtc *rtc = dev_get_drvdata(dev);  in dc_rtc_read_alarm()  local
119 	alarm_reg = readl_relaxed(rtc->regs + DC_RTC_ALARM);  in dc_rtc_read_alarm()
120 	reference = readl_relaxed(rtc->regs + DC_RTC_REFERENCE);  in dc_rtc_read_alarm()
123 	ret = dc_rtc_read(rtc, &now);  in dc_rtc_read_alarm()
128 	alarm->enabled = readl_relaxed(rtc->regs + DC_RTC_INTENABLE);  in dc_rtc_read_alarm()
135 	struct dc_rtc *rtc = dev_get_drvdata(dev);  in dc_rtc_set_alarm()  local
141 	reference = readl_relaxed(rtc->regs + DC_RTC_REFERENCE);  in dc_rtc_set_alarm()
142 	writel_relaxed(alarm_time - reference, rtc->regs + DC_RTC_ALARM);  in dc_rtc_set_alarm()
144 	writeb_relaxed(!!alarm->enabled, rtc->regs + DC_RTC_INTENABLE);  in dc_rtc_set_alarm()
151 	struct dc_rtc *rtc = dev_get_drvdata(dev);  in dc_rtc_alarm_irq_enable()  local
153 	writeb_relaxed(!!enabled, rtc->regs + DC_RTC_INTENABLE);  in dc_rtc_alarm_irq_enable()
168 	struct dc_rtc *rtc = dev_id;  in dc_rtc_irq()  local
170 	writeb_relaxed(1, rtc->regs + DC_RTC_INTFLAG_CLEAR);  in dc_rtc_irq()
171 	rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);  in dc_rtc_irq()
178 	struct dc_rtc *rtc;  in dc_rtc_probe()  local
181 	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);  in dc_rtc_probe()
182 	if (!rtc)  in dc_rtc_probe()
185 	rtc->regs = devm_platform_ioremap_resource(pdev, 0);  in dc_rtc_probe()
186 	if (IS_ERR(rtc->regs))  in dc_rtc_probe()
187 		return PTR_ERR(rtc->regs);  in dc_rtc_probe()
189 	rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);  in dc_rtc_probe()
190 	if (IS_ERR(rtc->rtc_dev))  in dc_rtc_probe()
191 		return PTR_ERR(rtc->rtc_dev);  in dc_rtc_probe()
196 	ret = devm_request_irq(&pdev->dev, irq, dc_rtc_irq, 0, pdev->name, rtc);  in dc_rtc_probe()
200 	platform_set_drvdata(pdev, rtc);  in dc_rtc_probe()
202 	rtc->rtc_dev->ops = &dc_rtc_ops;  in dc_rtc_probe()
203 	rtc->rtc_dev->range_max = U32_MAX;  in dc_rtc_probe()
205 	return devm_rtc_register_device(rtc->rtc_dev);  in dc_rtc_probe()
209 	{ .compatible = "cnxt,cx92755-rtc" },
223 MODULE_DESCRIPTION("Conexant Digicolor Realtime Clock Driver (RTC)");