add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rtc/rtc-pm8xxx.c
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@@ -1,13 +1,5 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 and
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- * only version 2 as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  */
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 #include <linux/of.h>
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 #include <linux/module.h>
..
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@@ -57,7 +49,7 @@
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  * @regmap:		regmap used to access RTC registers
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  * @allow_set_time:	indicates whether writing to the RTC is allowed
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  * @rtc_alarm_irq:	rtc alarm irq number.
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- * @ctrl_reg:		rtc control register.
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+ * @regs:		rtc registers description.
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  * @rtc_dev:		device structure.
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  * @ctrl_reg_lock:	spinlock protecting access to ctrl_reg.
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  */
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@@ -92,7 +84,7 @@
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 	if (!rtc_dd->allow_set_time)
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 		return -EACCES;
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-	rtc_tm_to_time(tm, &secs);
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+	secs = rtc_tm_to_time64(tm);
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 	dev_dbg(dev, "Seconds value to be written to RTC = %lu\n", secs);
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90
 
..
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@@ -216,11 +208,9 @@
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 	secs = value[0] | (value[1] << 8) | (value[2] << 16) |
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 	       ((unsigned long)value[3] << 24);
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-	rtc_time_to_tm(secs, tm);
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+	rtc_time64_to_tm(secs, tm);
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-	dev_dbg(dev, "secs = %lu, h:m:s == %d:%d:%d, d/m/y = %d/%d/%d\n",
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-		secs, tm->tm_hour, tm->tm_min, tm->tm_sec,
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-		tm->tm_mday, tm->tm_mon, tm->tm_year);
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+	dev_dbg(dev, "secs = %lu, h:m:s == %ptRt, y-m-d = %ptRdr\n", secs, tm, tm);
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 	return 0;
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 }
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@@ -229,17 +219,21 @@
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 {
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 	int rc, i;
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 	u8 value[NUM_8_BIT_RTC_REGS];
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-	unsigned int ctrl_reg;
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 	unsigned long secs, irq_flags;
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 	struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
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 	const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
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-	rtc_tm_to_time(&alarm->time, &secs);
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+	secs = rtc_tm_to_time64(&alarm->time);
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 	for (i = 0; i < NUM_8_BIT_RTC_REGS; i++) {
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 		value[i] = secs & 0xFF;
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 		secs >>= 8;
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 	}
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+
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+	rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
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+				regs->alarm_en, 0);
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+	if (rc)
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+		return rc;
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 	spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
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..
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@@ -250,25 +244,15 @@
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 		goto rtc_rw_fail;
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 	}
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-	rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
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-	if (rc)
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-		goto rtc_rw_fail;
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-
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-	if (alarm->enabled)
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-		ctrl_reg |= regs->alarm_en;
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-	else
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-		ctrl_reg &= ~regs->alarm_en;
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-
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-	rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg);
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-	if (rc) {
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-		dev_err(dev, "Write to RTC alarm control register failed\n");
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-		goto rtc_rw_fail;
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+	if (alarm->enabled) {
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+		rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl,
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+					regs->alarm_en, regs->alarm_en);
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+		if (rc)
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+			goto rtc_rw_fail;
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 	}
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-	dev_dbg(dev, "Alarm Set for h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n",
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-		alarm->time.tm_hour, alarm->time.tm_min,
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-		alarm->time.tm_sec, alarm->time.tm_mday,
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-		alarm->time.tm_mon, alarm->time.tm_year);
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+	dev_dbg(dev, "Alarm Set for h:m:s=%ptRt, y-m-d=%ptRdr\n",
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+		&alarm->time, &alarm->time);
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 rtc_rw_fail:
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 	spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags);
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 	return rc;
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@@ -292,18 +276,10 @@
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 	secs = value[0] | (value[1] << 8) | (value[2] << 16) |
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 	       ((unsigned long)value[3] << 24);
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-	rtc_time_to_tm(secs, &alarm->time);
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+	rtc_time64_to_tm(secs, &alarm->time);
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-	rc = rtc_valid_tm(&alarm->time);
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-	if (rc < 0) {
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-		dev_err(dev, "Invalid alarm time read from RTC\n");
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-		return rc;
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-	}
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-
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-	dev_dbg(dev, "Alarm set for - h:r:s=%d:%d:%d, d/m/y=%d/%d/%d\n",
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-		alarm->time.tm_hour, alarm->time.tm_min,
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-		alarm->time.tm_sec, alarm->time.tm_mday,
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-		alarm->time.tm_mon, alarm->time.tm_year);
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+	dev_dbg(dev, "Alarm set for - h:m:s=%ptRt, y-m-d=%ptRdr\n",
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+		&alarm->time, &alarm->time);
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 	return 0;
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 }
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@@ -315,6 +291,7 @@
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 	struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
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 	const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
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 	unsigned int ctrl_reg;
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+	u8 value[NUM_8_BIT_RTC_REGS] = {0};
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 	spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
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@@ -331,6 +308,16 @@
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 	if (rc) {
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 		dev_err(dev, "Write to RTC control register failed\n");
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 		goto rtc_rw_fail;
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+	}
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+
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+	/* Clear Alarm register */
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+	if (!enable) {
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+		rc = regmap_bulk_write(rtc_dd->regmap, regs->alarm_rw, value,
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+				       sizeof(value));
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+		if (rc) {
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+			dev_err(dev, "Clear RTC ALARM register failed\n");
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+			goto rtc_rw_fail;
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+		}
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 	}
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 rtc_rw_fail:
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@@ -482,10 +469,8 @@
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 	}
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 	rtc_dd->rtc_alarm_irq = platform_get_irq(pdev, 0);
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-	if (rtc_dd->rtc_alarm_irq < 0) {
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-		dev_err(&pdev->dev, "Alarm IRQ resource absent!\n");
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+	if (rtc_dd->rtc_alarm_irq < 0)
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 		return -ENXIO;
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-	}
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 	rtc_dd->allow_set_time = of_property_read_bool(pdev->dev.of_node,
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 						      "allow-set-time");
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@@ -502,13 +487,12 @@
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 	device_init_wakeup(&pdev->dev, 1);
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 	/* Register the RTC device */
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-	rtc_dd->rtc = devm_rtc_device_register(&pdev->dev, "pm8xxx_rtc",
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-					       &pm8xxx_rtc_ops, THIS_MODULE);
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-	if (IS_ERR(rtc_dd->rtc)) {
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-		dev_err(&pdev->dev, "%s: RTC registration failed (%ld)\n",
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-			__func__, PTR_ERR(rtc_dd->rtc));
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+	rtc_dd->rtc = devm_rtc_allocate_device(&pdev->dev);
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+	if (IS_ERR(rtc_dd->rtc))
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 		return PTR_ERR(rtc_dd->rtc);
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-	}
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+
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+	rtc_dd->rtc->ops = &pm8xxx_rtc_ops;
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+	rtc_dd->rtc->range_max = U32_MAX;
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 	/* Request the alarm IRQ */
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 	rc = devm_request_any_context_irq(&pdev->dev, rtc_dd->rtc_alarm_irq,
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@@ -520,9 +504,7 @@
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 		return rc;
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 	}
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-	dev_dbg(&pdev->dev, "Probe success !!\n");
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-
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-	return 0;
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+	return rtc_register_device(rtc_dd->rtc);
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 }
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 #ifdef CONFIG_PM_SLEEP