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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>
This commit is contained in:
Alexandre Belloni 2019-03-20 12:30:10 +01:00
parent 1097998d27
commit beee05dfbe
2 changed files with 9 additions and 0 deletions
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8
drivers/rtc/rtc-sh.c
View File

@ -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;

1
include/linux/rtc.h
View File

@ -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,