add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rtc/rtc-mc13xxx.c
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@@ -1,12 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * Real Time Clock driver for Freescale MC13XXX PMIC
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  *
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  * (C) 2009 Sascha Hauer, Pengutronix
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  * (C) 2009 Uwe Kleine-Koenig, Pengutronix
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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 as
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- * published by the Free Software Foundation.
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  */
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 #include <linux/mfd/mc13xxx.h>
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@@ -89,14 +86,14 @@
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 	return 0;
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 }
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-static int mc13xxx_rtc_set_mmss(struct device *dev, time64_t secs)
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+static int mc13xxx_rtc_set_time(struct device *dev, struct rtc_time *tm)
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 {
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 	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
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 	unsigned int seconds, days;
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 	unsigned int alarmseconds;
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 	int ret;
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-	days = div_s64_rem(secs, SEC_PER_DAY, &seconds);
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+	days = div_s64_rem(rtc_tm_to_time64(tm), SEC_PER_DAY, &seconds);
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 	mc13xxx_lock(priv->mc13xxx);
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@@ -158,7 +155,7 @@
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 static int mc13xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
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 {
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 	struct mc13xxx_rtc *priv = dev_get_drvdata(dev);
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-	unsigned seconds, days;
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+	unsigned int seconds, days;
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 	time64_t s1970;
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 	int enabled, pending;
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 	int ret;
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@@ -253,7 +250,7 @@
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 static const struct rtc_class_ops mc13xxx_rtc_ops = {
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 	.read_time = mc13xxx_rtc_read_time,
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-	.set_mmss64 = mc13xxx_rtc_set_mmss,
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+	.set_time = mc13xxx_rtc_set_time,
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 	.read_alarm = mc13xxx_rtc_read_alarm,
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 	.set_alarm = mc13xxx_rtc_set_alarm,
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 	.alarm_irq_enable = mc13xxx_rtc_alarm_irq_enable,
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@@ -285,7 +282,14 @@
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 	priv->mc13xxx = mc13xxx;
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 	priv->valid = 1;
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+	priv->rtc = devm_rtc_allocate_device(&pdev->dev);
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+	if (IS_ERR(priv->rtc))
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+		return PTR_ERR(priv->rtc);
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 	platform_set_drvdata(pdev, priv);
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+
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+	priv->rtc->ops = &mc13xxx_rtc_ops;
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+	/* 15bit days + hours, minutes, seconds */
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+	priv->rtc->range_max = (timeu64_t)(1 << 15) * SEC_PER_DAY - 1;
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 	mc13xxx_lock(mc13xxx);
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@@ -303,8 +307,11 @@
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 	mc13xxx_unlock(mc13xxx);
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-	priv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
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-					     &mc13xxx_rtc_ops, THIS_MODULE);
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+	ret = rtc_register_device(priv->rtc);
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+	if (ret) {
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+		mc13xxx_lock(mc13xxx);
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+		goto err_irq_request;
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+	}
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 	return 0;
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