tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
rtc: sh: set range
The SH RTC is a BCD RTC with some version having 4 digits for the year.
The range for the RTCs with only 2 digits for the year was unfortunately
shifted to handle 1999 to 2098.
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
+9
+8
drivers/rtc/rtc-sh.c
+8
drivers/rtc/rtc-sh.c
···
600
600
rtc->rtc_dev->ops = &sh_rtc_ops;
601
601
rtc->rtc_dev->max_user_freq = 256;
602
602
603
+
if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) {
604
+
rtc->rtc_dev->range_min = RTC_TIMESTAMP_BEGIN_1900;
605
+
rtc->rtc_dev->range_max = RTC_TIMESTAMP_END_9999;
606
+
} else {
607
+
rtc->rtc_dev->range_min = mktime64(1999, 1, 1, 0, 0, 0);
608
+
rtc->rtc_dev->range_max = mktime64(2098, 12, 31, 23, 59, 59);
609
+
}
610
+
603
611
ret = rtc_register_device(rtc->rtc_dev);
604
612
if (ret)
605
613
goto err_unmap;
+1
include/linux/rtc.h
+1
include/linux/rtc.h
···
165
165
#define RTC_TIMESTAMP_BEGIN_1900 -2208989361LL /* 1900-01-01 00:00:00 */
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166
#define RTC_TIMESTAMP_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */
167
167
#define RTC_TIMESTAMP_END_2099 4102444799LL /* 2099-12-31 23:59:59 */
168
+
#define RTC_TIMESTAMP_END_9999 253402300799LL /* 9999-12-31 23:59:59 */
168
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extern struct rtc_device *devm_rtc_device_register(struct device *dev,
170
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const char *name,