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Commit beee05df authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

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: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 1097998d

drivers/rtc/rtc-sh.c

+8 −0
Original line number Diff line number Diff line
@@ -600,6 +600,14 @@ static int __init sh_rtc_probe(struct platform_device *pdev) 
	rtc->rtc_dev->ops = &sh_rtc_ops;

	rtc->rtc_dev->max_user_freq = 256;



	if (rtc->capabilities & RTC_CAP_4_DIGIT_YEAR) {

		rtc->rtc_dev->range_min = RTC_TIMESTAMP_BEGIN_1900;

		rtc->rtc_dev->range_max = RTC_TIMESTAMP_END_9999;

	} else {

		rtc->rtc_dev->range_min = mktime64(1999, 1, 1, 0, 0, 0);

		rtc->rtc_dev->range_max = mktime64(2098, 12, 31, 23, 59, 59);

	}



	ret = rtc_register_device(rtc->rtc_dev);

	if (ret)

		goto err_unmap;

include/linux/rtc.h

+1 −0
Original line number Diff line number Diff line
@@ -165,6 +165,7 @@ struct rtc_device { 
#define RTC_TIMESTAMP_BEGIN_1900	-2208989361LL /* 1900-01-01 00:00:00 */

#define RTC_TIMESTAMP_BEGIN_2000	946684800LL /* 2000-01-01 00:00:00 */

#define RTC_TIMESTAMP_END_2099		4102444799LL /* 2099-12-31 23:59:59 */

#define RTC_TIMESTAMP_END_9999		253402300799LL /* 9999-12-31 23:59:59 */



extern struct rtc_device *devm_rtc_device_register(struct device *dev,

					const char *name,