1 // SPDX-License-Identifier: GPL-2.0-only
3  * rtc-cv1800.c: RTC driver for Sophgo cv1800 RTC
16 #include <linux/rtc.h>
47 	regmap_read(info->rtc_map, SEC_PULSE_GEN, &reg);  in cv1800_rtc_enabled()
57 	regmap_update_bits(info->rtc_map, SEC_PULSE_GEN, SEL_SEC_PULSE, 0);  in cv1800_rtc_enable()
64 	regmap_write(info->rtc_map, ALARM_ENABLE, enabled);  in cv1800_rtc_alarm_irq_enable()
74 	alarm_time = rtc_tm_to_time64(&alrm->time);  in cv1800_rtc_set_alarm()
78 	regmap_write(info->rtc_map, ALARM_TIME, alarm_time);  in cv1800_rtc_set_alarm()
80 	cv1800_rtc_alarm_irq_enable(dev, alrm->enabled);  in cv1800_rtc_set_alarm()
92 		alarm->enabled = 0;  in cv1800_rtc_read_alarm()
96 	regmap_read(info->rtc_map, ALARM_ENABLE, &enabled);  in cv1800_rtc_read_alarm()
98 	alarm->enabled = enabled & ALARM_ENABLE_MASK;  in cv1800_rtc_read_alarm()
100 	regmap_read(info->rtc_map, ALARM_TIME, &time);  in cv1800_rtc_read_alarm()
102 	rtc_time64_to_tm(time, &alarm->time);  in cv1800_rtc_read_alarm()
113 		return -EINVAL;  in cv1800_rtc_read_time()
115 	regmap_read(info->rtc_map, SEC_CNTR_VAL, &sec);  in cv1800_rtc_read_time()
129 	regmap_write(info->rtc_map, SET_SEC_CNTR_VAL, sec);  in cv1800_rtc_set_time()
130 	regmap_write(info->rtc_map, SET_SEC_CNTR_TRIG, 1);  in cv1800_rtc_set_time()
132 	regmap_write(info->rtc_map, MACRO_RG_SET_T, sec);  in cv1800_rtc_set_time()
143 	rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);  in cv1800_rtc_irq_handler()
145 	regmap_write(info->rtc_map, ALARM_ENABLE, 0);  in cv1800_rtc_irq_handler()
160 	struct cv1800_rtc_priv *rtc;  in cv1800_rtc_probe()  local
163 	rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);  in cv1800_rtc_probe()
164 	if (!rtc)  in cv1800_rtc_probe()
165 		return -ENOMEM;  in cv1800_rtc_probe()
167 	rtc->rtc_map = device_node_to_regmap(pdev->dev.parent->of_node);  in cv1800_rtc_probe()
168 	if (IS_ERR(rtc->rtc_map))  in cv1800_rtc_probe()
169 		return dev_err_probe(&pdev->dev, PTR_ERR(rtc->rtc_map),  in cv1800_rtc_probe()
172 	rtc->irq = platform_get_irq(pdev, 0);  in cv1800_rtc_probe()
173 	if (rtc->irq < 0)  in cv1800_rtc_probe()
174 		return rtc->irq;  in cv1800_rtc_probe()
176 	rtc->clk = devm_clk_get_enabled(pdev->dev.parent, "rtc");  in cv1800_rtc_probe()
177 	if (IS_ERR(rtc->clk))  in cv1800_rtc_probe()
178 		return dev_err_probe(&pdev->dev, PTR_ERR(rtc->clk),  in cv1800_rtc_probe()
179 				     "rtc clk not found\n");  in cv1800_rtc_probe()
181 	platform_set_drvdata(pdev, rtc);  in cv1800_rtc_probe()
183 	device_init_wakeup(&pdev->dev, 1);  in cv1800_rtc_probe()
185 	rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);  in cv1800_rtc_probe()
186 	if (IS_ERR(rtc->rtc_dev))  in cv1800_rtc_probe()
187 		return PTR_ERR(rtc->rtc_dev);  in cv1800_rtc_probe()
189 	rtc->rtc_dev->ops = &cv1800_rtc_ops;  in cv1800_rtc_probe()
190 	rtc->rtc_dev->range_max = U32_MAX;  in cv1800_rtc_probe()
192 	ret = devm_request_irq(&pdev->dev, rtc->irq, cv1800_rtc_irq_handler,  in cv1800_rtc_probe()
193 			       IRQF_TRIGGER_HIGH, "rtc alarm", rtc);  in cv1800_rtc_probe()
195 		return dev_err_probe(&pdev->dev, ret,  in cv1800_rtc_probe()
198 	return devm_rtc_register_device(rtc->rtc_dev);  in cv1800_rtc_probe()
202 	{ .name = "cv1800b-rtc" },
209 		.name = "sophgo-cv1800-rtc",
217 MODULE_DESCRIPTION("Sophgo cv1800 RTC Driver");