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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/rtc/rtc-pic32.c
....@@ -1,18 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0+
12 /*
23  * PIC32 RTC driver
34  *
45  * Joshua Henderson <joshua.henderson@microchip.com>
56  * Copyright (C) 2016 Microchip Technology Inc.  All rights reserved.
67  *
7
- * This program is free software; you can redistribute it and/or modify
8
- * it under the terms of the GNU General Public License as published by
9
- * the Free Software Foundation; either version 2 of the License, or
10
- * (at your option) any later version.
11
- *
12
- * This program is distributed in the hope that it will be useful, but WITHOUT
13
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15
- * more details.
168  */
179 #include <linux/init.h>
1810 #include <linux/module.h>
....@@ -170,9 +162,7 @@
170162 
171163 	rtc_tm->tm_year += 100;
172164 
173
-	dev_dbg(dev, "read time %04d.%02d.%02d %02d:%02d:%02d\n",
174
-		1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday,
175
-		rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec);
165
+	dev_dbg(dev, "read time %ptR\n", rtc_tm);
176166 
177167 	clk_disable(pdata->clk);
178168 	return 0;
....@@ -182,16 +172,8 @@
182172 {
183173 	struct pic32_rtc_dev *pdata = dev_get_drvdata(dev);
184174 	void __iomem *base = pdata->reg_base;
185
-	int year = tm->tm_year - 100;
186175 
187
-	dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
188
-		1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
189
-		tm->tm_hour, tm->tm_min, tm->tm_sec);
190
-
191
-	if (year < 0 || year >= 100) {
192
-		dev_err(dev, "rtc only supports 100 years\n");
193
-		return -EINVAL;
194
-	}
176
+	dev_dbg(dev, "set time %ptR\n", tm);
195177 
196178 	clk_enable(pdata->clk);
197179 	writeb(bin2bcd(tm->tm_sec),  base + PIC32_RTCSEC);
....@@ -199,7 +181,7 @@
199181 	writeb(bin2bcd(tm->tm_hour), base + PIC32_RTCHOUR);
200182 	writeb(bin2bcd(tm->tm_mday), base + PIC32_RTCDAY);
201183 	writeb(bin2bcd(tm->tm_mon + 1), base + PIC32_RTCMON);
202
-	writeb(bin2bcd(year), base + PIC32_RTCYEAR);
184
+	writeb(bin2bcd(tm->tm_year - 100), base + PIC32_RTCYEAR);
203185 	clk_disable(pdata->clk);
204186 
205187 	return 0;
....@@ -224,10 +206,7 @@
224206 
225207 	alrm->enabled = (alm_en & PIC32_RTCALRM_ALRMEN) ? 1 : 0;
226208 
227
-	dev_dbg(dev, "getalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
228
-		alm_en,
229
-		1900 + alm_tm->tm_year, alm_tm->tm_mon, alm_tm->tm_mday,
230
-		alm_tm->tm_hour, alm_tm->tm_min, alm_tm->tm_sec);
209
+	dev_dbg(dev, "getalarm: %d, %ptR\n", alm_en, alm_tm);
231210 
232211 	alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec);
233212 	alm_tm->tm_min = bcd2bin(alm_tm->tm_min);
....@@ -247,10 +226,7 @@
247226 	void __iomem *base = pdata->reg_base;
248227 
249228 	clk_enable(pdata->clk);
250
-	dev_dbg(dev, "setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
251
-		alrm->enabled,
252
-		1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday,
253
-		tm->tm_hour, tm->tm_min, tm->tm_sec);
229
+	dev_dbg(dev, "setalarm: %d, %ptR\n", alrm->enabled, tm);
254230 
255231 	writel(0x00, base + PIC32_ALRMTIME);
256232 	writel(0x00, base + PIC32_ALRMDATE);
....@@ -322,7 +298,6 @@
322298 static int pic32_rtc_probe(struct platform_device *pdev)
323299 {
324300 	struct pic32_rtc_dev *pdata;
325
-	struct resource *res;
326301 	int ret;
327302 
328303 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
....@@ -332,13 +307,10 @@
332307 	platform_set_drvdata(pdev, pdata);
333308 
334309 	pdata->alarm_irq = platform_get_irq(pdev, 0);
335
-	if (pdata->alarm_irq < 0) {
336
-		dev_err(&pdev->dev, "no irq for alarm\n");
310
+	if (pdata->alarm_irq < 0)
337311 		return pdata->alarm_irq;
338
-	}
339312 
340
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
341
-	pdata->reg_base = devm_ioremap_resource(&pdev->dev, res);
313
+	pdata->reg_base = devm_platform_ioremap_resource(pdev, 0);
342314 	if (IS_ERR(pdata->reg_base))
343315 		return PTR_ERR(pdata->reg_base);
344316 
....@@ -358,13 +330,17 @@
358330 
359331 	device_init_wakeup(&pdev->dev, 1);
360332 
361
-	pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
362
-						 &pic32_rtcops,
363
-						 THIS_MODULE);
364
-	if (IS_ERR(pdata->rtc)) {
365
-		ret = PTR_ERR(pdata->rtc);
333
+	pdata->rtc = devm_rtc_allocate_device(&pdev->dev);
334
+	if (IS_ERR(pdata->rtc))
335
+		return PTR_ERR(pdata->rtc);
336
+
337
+	pdata->rtc->ops = &pic32_rtcops;
338
+	pdata->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
339
+	pdata->rtc->range_max = RTC_TIMESTAMP_END_2099;
340
+
341
+	ret = rtc_register_device(pdata->rtc);
342
+	if (ret)
366343 		goto err_nortc;
367
-	}
368344 
369345 	pdata->rtc->max_user_freq = 128;
370346