修改GPIO导出默认初始值

hc

2024-10-16 50a212ec906f7524620675f0c57357691c26c81f

 kernel/arch/sh/boards/mach-dreamcast/rtc.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * arch/sh/boards/dreamcast/rtc.c
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  *
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@@ -5,14 +6,12 @@
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  *
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  * Copyright (c) 2001, 2002 M. R. Brown <mrbrown@0xd6.org>
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  * Copyright (c) 2002 Paul Mundt <lethal@chaoticdreams.org>
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- *
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- * Released under the terms of the GNU GPL v2.0.
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- *
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  */
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 #include <linux/time.h>
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-#include <asm/rtc.h>
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-#include <asm/io.h>
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+#include <linux/rtc.h>
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+#include <linux/io.h>
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+#include <linux/platform_device.h>
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 /* The AICA RTC has an Epoch of 1/1/1950, so we must subtract 20 years (in
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    seconds) to get the standard Unix Epoch when getting the time, and add
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@@ -26,13 +25,15 @@
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 /**
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  * aica_rtc_gettimeofday - Get the time from the AICA RTC
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- * @ts: pointer to resulting timespec
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+ * @dev: the RTC device (ignored)
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+ * @tm: pointer to resulting RTC time structure
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  *
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  * Grabs the current RTC seconds counter and adjusts it to the Unix Epoch.
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  */
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-static void aica_rtc_gettimeofday(struct timespec *ts)
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+static int aica_rtc_gettimeofday(struct device *dev, struct rtc_time *tm)
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 {
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 	unsigned long val1, val2;
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+	time64_t t;
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 	do {
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 		val1 = ((__raw_readl(AICA_RTC_SECS_H) & 0xffff) << 16) |
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@@ -42,22 +43,26 @@
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 			(__raw_readl(AICA_RTC_SECS_L) & 0xffff);
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 	} while (val1 != val2);
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-	ts->tv_sec = val1 - TWENTY_YEARS;
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+	/* normalize to 1970..2106 time range */
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+	t = (u32)(val1 - TWENTY_YEARS);
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-	/* Can't get nanoseconds with just a seconds counter. */
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-	ts->tv_nsec = 0;
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+	rtc_time64_to_tm(t, tm);
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+
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+	return 0;
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 }
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 /**
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  * aica_rtc_settimeofday - Set the AICA RTC to the current time
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- * @secs: contains the time_t to set
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+ * @dev: the RTC device (ignored)
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+ * @tm: pointer to new RTC time structure
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  *
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  * Adjusts the given @tv to the AICA Epoch and sets the RTC seconds counter.
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  */
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-static int aica_rtc_settimeofday(const time_t secs)
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+static int aica_rtc_settimeofday(struct device *dev, struct rtc_time *tm)
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 {
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 	unsigned long val1, val2;
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-	unsigned long adj = secs + TWENTY_YEARS;
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+	time64_t secs = rtc_tm_to_time64(tm);
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+	u32 adj = secs + TWENTY_YEARS;
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 	do {
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 		__raw_writel((adj & 0xffff0000) >> 16, AICA_RTC_SECS_H);
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@@ -73,9 +78,19 @@
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 	return 0;
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 }
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-void aica_time_init(void)
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-{
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-	rtc_sh_get_time = aica_rtc_gettimeofday;
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-	rtc_sh_set_time = aica_rtc_settimeofday;
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-}
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+static const struct rtc_class_ops rtc_generic_ops = {
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+	.read_time = aica_rtc_gettimeofday,
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+	.set_time = aica_rtc_settimeofday,
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+};
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+static int __init aica_time_init(void)
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+{
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+	struct platform_device *pdev;
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+
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+	pdev = platform_device_register_data(NULL, "rtc-generic", -1,
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+					     &rtc_generic_ops,
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+					     sizeof(rtc_generic_ops));
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+
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+	return PTR_ERR_OR_ZERO(pdev);
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+}
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+arch_initcall(aica_time_init);