1 // SPDX-License-Identifier: GPL-2.0
40 	struct regmap *map;  member
44 	int irq;
47 static irqreturn_t rtc_update_handler(int irq, void *data)  in rtc_update_handler()
50 	int mask;  in rtc_update_handler()  local
52 	mask = PM800_ALARM | PM800_ALARM_WAKEUP;  in rtc_update_handler()
53 	regmap_update_bits(info->map, PM800_RTC_CONTROL, mask | PM800_ALARM1_EN,  in rtc_update_handler()
54 			   mask);  in rtc_update_handler()
55 	rtc_update_irq(info->rtc_dev, 1, RTC_AF);  in rtc_update_handler()
59 static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)  in pm80x_rtc_alarm_irq_enable()
64 		regmap_update_bits(info->map, PM800_RTC_CONTROL,  in pm80x_rtc_alarm_irq_enable()
67 		regmap_update_bits(info->map, PM800_RTC_CONTROL,  in pm80x_rtc_alarm_irq_enable()
73  * Calculate the next alarm time given the requested alarm time mask
82 	next->tm_year = now->tm_year;  in rtc_next_alarm_time()
83 	next->tm_mon = now->tm_mon;  in rtc_next_alarm_time()
84 	next->tm_mday = now->tm_mday;  in rtc_next_alarm_time()
85 	next->tm_hour = alrm->tm_hour;  in rtc_next_alarm_time()
86 	next->tm_min = alrm->tm_min;  in rtc_next_alarm_time()
87 	next->tm_sec = alrm->tm_sec;  in rtc_next_alarm_time()
99 static int pm80x_rtc_read_time(struct device *dev, struct rtc_time *tm)  in pm80x_rtc_read_time()
104 	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);  in pm80x_rtc_read_time()
107 	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);  in pm80x_rtc_read_time()
109 	/* load 32-bit read-only counter */  in pm80x_rtc_read_time()
110 	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);  in pm80x_rtc_read_time()
114 	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",  in pm80x_rtc_read_time()
120 static int pm80x_rtc_set_time(struct device *dev, struct rtc_time *tm)  in pm80x_rtc_set_time()
128 	/* load 32-bit read-only counter */  in pm80x_rtc_set_time()
129 	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);  in pm80x_rtc_set_time()
132 	base = ticks - data;  in pm80x_rtc_set_time()
133 	dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",  in pm80x_rtc_set_time()
139 	regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4);  in pm80x_rtc_set_time()
144 static int pm80x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)  in pm80x_rtc_read_alarm()
149 	int ret;  in pm80x_rtc_read_alarm()
151 	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);  in pm80x_rtc_read_alarm()
154 	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);  in pm80x_rtc_read_alarm()
156 	regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4);  in pm80x_rtc_read_alarm()
160 	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",  in pm80x_rtc_read_alarm()
163 	rtc_time64_to_tm(ticks, &alrm->time);  in pm80x_rtc_read_alarm()
164 	regmap_read(info->map, PM800_RTC_CONTROL, &ret);  in pm80x_rtc_read_alarm()
165 	alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0;  in pm80x_rtc_read_alarm()
166 	alrm->pending = (ret & (PM800_ALARM | PM800_ALARM_WAKEUP)) ? 1 : 0;  in pm80x_rtc_read_alarm()
170 static int pm80x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)  in pm80x_rtc_set_alarm()
176 	int mask;  in pm80x_rtc_set_alarm()  local
178 	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0);  in pm80x_rtc_set_alarm()
180 	regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);  in pm80x_rtc_set_alarm()
183 	dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);  in pm80x_rtc_set_alarm()
185 	/* load 32-bit read-only counter */  in pm80x_rtc_set_alarm()
186 	regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);  in pm80x_rtc_set_alarm()
190 	dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",  in pm80x_rtc_set_alarm()
194 	dev_dbg(info->dev, "%s, now time : %lu\n", __func__, ticks);  in pm80x_rtc_set_alarm()
195 	rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time);  in pm80x_rtc_set_alarm()
198 	dev_dbg(info->dev, "%s, alarm time: %lu\n", __func__, ticks);  in pm80x_rtc_set_alarm()
199 	data = ticks - base;  in pm80x_rtc_set_alarm()
205 	regmap_raw_write(info->map, PM800_RTC_EXPIRE1_1, buf, 4);  in pm80x_rtc_set_alarm()
206 	if (alrm->enabled) {  in pm80x_rtc_set_alarm()
207 		mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN;  in pm80x_rtc_set_alarm()
208 		regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, mask);  in pm80x_rtc_set_alarm()
210 		mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN;  in pm80x_rtc_set_alarm()
211 		regmap_update_bits(info->map, PM800_RTC_CONTROL, mask,  in pm80x_rtc_set_alarm()
226 static int pm80x_rtc_suspend(struct device *dev)  in pm80x_rtc_suspend()
231 static int pm80x_rtc_resume(struct device *dev)  in pm80x_rtc_resume()
239 static int pm80x_rtc_probe(struct platform_device *pdev)  in pm80x_rtc_probe()
241 	struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);  in pm80x_rtc_probe()
242 	struct pm80x_rtc_pdata *pdata = dev_get_platdata(&pdev->dev);  in pm80x_rtc_probe()
244 	struct device_node *node = pdev->dev.of_node;  in pm80x_rtc_probe()
245 	int ret;  in pm80x_rtc_probe()
248 		dev_err(&pdev->dev,  in pm80x_rtc_probe()
249 			"pm80x-rtc requires platform data or of_node\n");  in pm80x_rtc_probe()
250 		return -EINVAL;  in pm80x_rtc_probe()
254 		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);  in pm80x_rtc_probe()
256 			dev_err(&pdev->dev, "failed to allocate memory\n");  in pm80x_rtc_probe()
257 			return -ENOMEM;  in pm80x_rtc_probe()
262 	    devm_kzalloc(&pdev->dev, sizeof(struct pm80x_rtc_info), GFP_KERNEL);  in pm80x_rtc_probe()
264 		return -ENOMEM;  in pm80x_rtc_probe()
265 	info->irq = platform_get_irq(pdev, 0);  in pm80x_rtc_probe()
266 	if (info->irq < 0) {  in pm80x_rtc_probe()
267 		ret = -EINVAL;  in pm80x_rtc_probe()
271 	info->chip = chip;  in pm80x_rtc_probe()
272 	info->map = chip->regmap;  in pm80x_rtc_probe()
273 	if (!info->map) {  in pm80x_rtc_probe()
274 		dev_err(&pdev->dev, "no regmap!\n");  in pm80x_rtc_probe()
275 		ret = -EINVAL;  in pm80x_rtc_probe()
279 	info->dev = &pdev->dev;  in pm80x_rtc_probe()
280 	dev_set_drvdata(&pdev->dev, info);  in pm80x_rtc_probe()
282 	info->rtc_dev = devm_rtc_allocate_device(&pdev->dev);  in pm80x_rtc_probe()
283 	if (IS_ERR(info->rtc_dev))  in pm80x_rtc_probe()
284 		return PTR_ERR(info->rtc_dev);  in pm80x_rtc_probe()
286 	ret = pm80x_request_irq(chip, info->irq, rtc_update_handler,  in pm80x_rtc_probe()
289 		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",  in pm80x_rtc_probe()
290 			info->irq, ret);  in pm80x_rtc_probe()
294 	info->rtc_dev->ops = &pm80x_rtc_ops;  in pm80x_rtc_probe()
295 	info->rtc_dev->range_max = U32_MAX;  in pm80x_rtc_probe()
297 	ret = devm_rtc_register_device(info->rtc_dev);  in pm80x_rtc_probe()
303 	 * free running in PMIC power-down state.  in pm80x_rtc_probe()
305 	regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO,  in pm80x_rtc_probe()
309 	info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup;  in pm80x_rtc_probe()
311 	device_init_wakeup(&pdev->dev, 1);  in pm80x_rtc_probe()
315 	pm80x_free_irq(chip, info->irq, info);  in pm80x_rtc_probe()
323 	pm80x_free_irq(info->chip, info->irq, info);  in pm80x_rtc_remove()
328 		   .name = "88pm80x-rtc",
340 MODULE_ALIAS("platform:88pm80x-rtc");