forked from mirrors/linux
ccb2dba3c1
While the RTC framework intends to only handle dates after 1970 for consumers, time conversion must also work for earlier dates to cover e.g. storing dates beyond an RTC's range_max. This is most relevant for the rtc-mt6397 driver that has range_min = RTC_TIMESTAMP_BEGIN_1900; range_max = mktime64(2027, 12, 31, 23, 59, 59); and so needs working support for timestamps in 1900 starting in less than three years. So shift the tested interval of timestamps to also cover years 1900 to 1970. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com> Link: https://lore.kernel.org/r/20250428-enable-rtc-v4-5-2b2f7e3f9349@baylibre.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
// SPDX-License-Identifier: LGPL-2.1+
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#include <kunit/test.h>
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#include <linux/rtc.h>
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/*
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* Advance a date by one day.
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*/
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static void advance_date(int *year, int *month, int *mday, int *yday, int *wday)
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{
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*wday = (*wday + 1) % 7;
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if (*mday != rtc_month_days(*month - 1, *year)) {
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++*mday;
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++*yday;
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return;
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}
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*mday = 1;
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if (*month != 12) {
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++*month;
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++*yday;
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return;
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}
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*month = 1;
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*yday = 1;
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++*year;
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}
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/*
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* Check every day in specified number of years interval starting on 1970-01-01
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* against the expected result.
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*/
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static void rtc_time64_to_tm_test_date_range(struct kunit *test, int years)
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{
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/*
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* years = (years / 400) * 400 years
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* = (years / 400) * 146097 days
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* = (years / 400) * 146097 * 86400 seconds
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*/
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time64_t total_secs = ((time64_t)years) / 400 * 146097 * 86400;
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int year = 1900;
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int month = 1;
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int mday = 1;
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int yday = 1;
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int wday = 1; /* Jan 1st 1900 was a Monday */
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struct rtc_time result;
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time64_t secs;
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const time64_t sec_offset = RTC_TIMESTAMP_BEGIN_1900 + ((1 * 60) + 2) * 60 + 3;
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for (secs = 0; secs <= total_secs; secs += 86400) {
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rtc_time64_to_tm(secs + sec_offset, &result);
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#define FAIL_MSG "%d/%02d/%02d (%2d, %d) : %lld", \
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year, month, mday, yday, wday, secs + sec_offset
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KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, month - 1, result.tm_mon, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, mday, result.tm_mday, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, yday, result.tm_yday, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, 1, result.tm_hour, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, 2, result.tm_min, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, 3, result.tm_sec, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, wday, result.tm_wday, FAIL_MSG);
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advance_date(&year, &month, &mday, &yday, &wday);
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}
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}
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/*
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* Checks every day in a 160000 years interval starting on 1900-01-01
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* against the expected result.
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*/
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static void rtc_time64_to_tm_test_date_range_160000(struct kunit *test)
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{
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rtc_time64_to_tm_test_date_range(test, 160000);
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}
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/*
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* Checks every day in a 1000 years interval starting on 1900-01-01
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* against the expected result.
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*/
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static void rtc_time64_to_tm_test_date_range_1000(struct kunit *test)
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{
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rtc_time64_to_tm_test_date_range(test, 1000);
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}
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static struct kunit_case rtc_lib_test_cases[] = {
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KUNIT_CASE(rtc_time64_to_tm_test_date_range_1000),
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KUNIT_CASE_SLOW(rtc_time64_to_tm_test_date_range_160000),
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{}
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};
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static struct kunit_suite rtc_lib_test_suite = {
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.name = "rtc_lib_test_cases",
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.test_cases = rtc_lib_test_cases,
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};
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kunit_test_suite(rtc_lib_test_suite);
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MODULE_DESCRIPTION("KUnit test for RTC lib functions");
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MODULE_LICENSE("GPL");
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