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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/rtc/rtc-pl031.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * drivers/rtc/rtc-pl031.c
34  *
....@@ -9,11 +10,6 @@
910  *
1011  * Author: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
1112  * Copyright 2010 (c) ST-Ericsson AB
12
- *
13
- * This program is free software; you can redistribute it and/or
14
- * modify it under the terms of the GNU General Public License
15
- * as published by the Free Software Foundation; either version
16
- * 2 of the License, or (at your option) any later version.
1713  */
1814 #include <linux/module.h>
1915 #include <linux/rtc.h>
....@@ -84,6 +80,8 @@
8480 	bool clockwatch;
8581 	bool st_weekday;
8682 	unsigned long irqflags;
83
+	time64_t range_min;
84
+	timeu64_t range_max;
8785 };
8886 
8987 struct pl031_local {
....@@ -127,11 +125,9 @@
127125 		return -EINVAL;
128126 	} else if (wday == -1) {
129127 		/* wday is not provided, calculate it here */
130
-		unsigned long time;
131128 		struct rtc_time calc_tm;
132129 
133
-		rtc_tm_to_time(tm, &time);
134
-		rtc_time_to_tm(time, &calc_tm);
130
+		rtc_time64_to_tm(rtc_tm_to_time64(tm), &calc_tm);
135131 		wday = calc_tm.tm_wday;
136132 	}
137133 
....@@ -214,17 +210,13 @@
214210 	unsigned long bcd_year;
215211 	int ret;
216212 
217
-	/* At the moment, we can only deal with non-wildcarded alarm times. */
218
-	ret = rtc_valid_tm(&alarm->time);
213
+	ret = pl031_stv2_tm_to_time(dev, &alarm->time,
214
+				    &time, &bcd_year);
219215 	if (ret == 0) {
220
-		ret = pl031_stv2_tm_to_time(dev, &alarm->time,
221
-					    &time, &bcd_year);
222
-		if (ret == 0) {
223
-			writel(bcd_year, ldata->base + RTC_YMR);
224
-			writel(time, ldata->base + RTC_MR);
216
+		writel(bcd_year, ldata->base + RTC_YMR);
217
+		writel(time, ldata->base + RTC_MR);
225218 
226
-			pl031_alarm_irq_enable(dev, alarm->enabled);
227
-		}
219
+		pl031_alarm_irq_enable(dev, alarm->enabled);
228220 	}
229221 
230222 	return ret;
....@@ -252,30 +244,25 @@
252244 {
253245 	struct pl031_local *ldata = dev_get_drvdata(dev);
254246 
255
-	rtc_time_to_tm(readl(ldata->base + RTC_DR), tm);
247
+	rtc_time64_to_tm(readl(ldata->base + RTC_DR), tm);
256248 
257249 	return 0;
258250 }
259251 
260252 static int pl031_set_time(struct device *dev, struct rtc_time *tm)
261253 {
262
-	unsigned long time;
263254 	struct pl031_local *ldata = dev_get_drvdata(dev);
264
-	int ret;
265255 
266
-	ret = rtc_tm_to_time(tm, &time);
256
+	writel(rtc_tm_to_time64(tm), ldata->base + RTC_LR);
267257 
268
-	if (ret == 0)
269
-		writel(time, ldata->base + RTC_LR);
270
-
271
-	return ret;
258
+	return 0;
272259 }
273260 
274261 static int pl031_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
275262 {
276263 	struct pl031_local *ldata = dev_get_drvdata(dev);
277264 
278
-	rtc_time_to_tm(readl(ldata->base + RTC_MR), &alarm->time);
265
+	rtc_time64_to_tm(readl(ldata->base + RTC_MR), &alarm->time);
279266 
280267 	alarm->pending = readl(ldata->base + RTC_RIS) & RTC_BIT_AI;
281268 	alarm->enabled = readl(ldata->base + RTC_IMSC) & RTC_BIT_AI;
....@@ -286,23 +273,14 @@
286273 static int pl031_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
287274 {
288275 	struct pl031_local *ldata = dev_get_drvdata(dev);
289
-	unsigned long time;
290
-	int ret;
291276 
292
-	/* At the moment, we can only deal with non-wildcarded alarm times. */
293
-	ret = rtc_valid_tm(&alarm->time);
294
-	if (ret == 0) {
295
-		ret = rtc_tm_to_time(&alarm->time, &time);
296
-		if (ret == 0) {
297
-			writel(time, ldata->base + RTC_MR);
298
-			pl031_alarm_irq_enable(dev, alarm->enabled);
299
-		}
300
-	}
277
+	writel(rtc_tm_to_time64(&alarm->time), ldata->base + RTC_MR);
278
+	pl031_alarm_irq_enable(dev, alarm->enabled);
301279 
302
-	return ret;
280
+	return 0;
303281 }
304282 
305
-static int pl031_remove(struct amba_device *adev)
283
+static void pl031_remove(struct amba_device *adev)
306284 {
307285 	struct pl031_local *ldata = dev_get_drvdata(&adev->dev);
308286 
....@@ -310,10 +288,7 @@
310288 	device_init_wakeup(&adev->dev, false);
311289 	if (adev->irq[0])
312290 		free_irq(adev->irq[0], ldata);
313
-	rtc_device_unregister(ldata->rtc);
314291 	amba_release_regions(adev);
315
-
316
-	return 0;
317292 }
318293 
319294 static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
....@@ -383,24 +358,29 @@
383358 	}
384359 
385360 	device_init_wakeup(&adev->dev, true);
386
-	ldata->rtc = rtc_device_register("pl031", &adev->dev, ops,
387
-					THIS_MODULE);
361
+	ldata->rtc = devm_rtc_allocate_device(&adev->dev);
388362 	if (IS_ERR(ldata->rtc)) {
389363 		ret = PTR_ERR(ldata->rtc);
390364 		goto out;
391365 	}
392366 
367
+	ldata->rtc->ops = ops;
368
+	ldata->rtc->range_min = vendor->range_min;
369
+	ldata->rtc->range_max = vendor->range_max;
370
+
371
+	ret = rtc_register_device(ldata->rtc);
372
+	if (ret)
373
+		goto out;
374
+
393375 	if (adev->irq[0]) {
394376 		ret = request_irq(adev->irq[0], pl031_interrupt,
395377 				  vendor->irqflags, "rtc-pl031", ldata);
396378 		if (ret)
397
-			goto out_no_irq;
379
+			goto out;
398380 		dev_pm_set_wake_irq(&adev->dev, adev->irq[0]);
399381 	}
400382 	return 0;
401383 
402
-out_no_irq:
403
-	rtc_device_unregister(ldata->rtc);
404384 out:
405385 	amba_release_regions(adev);
406386 err_req:
....@@ -417,6 +397,7 @@
417397 		.set_alarm = pl031_set_alarm,
418398 		.alarm_irq_enable = pl031_alarm_irq_enable,
419399 	},
400
+	.range_max = U32_MAX,
420401 };
421402 
422403 /* The First ST derivative */
....@@ -430,6 +411,7 @@
430411 	},
431412 	.clockwatch = true,
432413 	.st_weekday = true,
414
+	.range_max = U32_MAX,
433415 };
434416 
435417 /* And the second ST derivative */
....@@ -450,6 +432,8 @@
450432 	 * remove IRQF_COND_SUSPEND
451433 	 */
452434 	.irqflags = IRQF_SHARED | IRQF_COND_SUSPEND,
435
+	.range_min = RTC_TIMESTAMP_BEGIN_0000,
436
+	.range_max = RTC_TIMESTAMP_END_9999,
453437 };
454438 
455439 static const struct amba_id pl031_ids[] = {