From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: linux-rtc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@bootlin.com>
Subject: [PATCH 01/10] rtc: add a timestamp for year 0
Date: Mon, 7 Oct 2019 15:47:15 +0200 [thread overview]
Message-ID: <20191007134724.15505-1-alexandre.belloni@bootlin.com> (raw)
A few RTCs handle dates from year 0 to year 9999. Add a timestamp even if
years before 1970 will probably never be used.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
include/linux/rtc.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index df666cf29ef1..2680f9b2b119 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -160,6 +160,7 @@ struct rtc_device {
#define to_rtc_device(d) container_of(d, struct rtc_device, dev)
/* useful timestamps */
+#define RTC_TIMESTAMP_BEGIN_0000 -62167219200ULL /* 0000-01-01 00:00:00 */
#define RTC_TIMESTAMP_BEGIN_1900 -2208988800LL /* 1900-01-01 00:00:00 */
#define RTC_TIMESTAMP_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */
#define RTC_TIMESTAMP_END_2063 2966371199LL /* 2063-12-31 23:59:59 */
--
2.21.0
next reply other threads:[~2019-10-07 13:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-07 13:47 Alexandre Belloni [this message]
2019-10-07 13:47 ` [PATCH 02/10] rtc: ds1347: remove verbose messages Alexandre Belloni
2019-10-07 13:47 ` [PATCH 03/10] rtc: ds1347: remove useless read Alexandre Belloni
2019-10-07 13:47 ` [PATCH 04/10] rtc: ds1347: simplify getting .driver_data Alexandre Belloni
2019-10-07 13:47 ` [PATCH 05/10] rtc: ds1347: mask ALM OUT when reading time Alexandre Belloni
2019-10-07 13:47 ` [PATCH 06/10] rtc: ds1347: convert to devm_rtc_allocate_device Alexandre Belloni
2019-10-07 13:47 ` [PATCH 07/10] rtc: ds1347: set range Alexandre Belloni
2019-10-07 13:47 ` [PATCH 08/10] rtc: ds1347: properly handle oscillator failures Alexandre Belloni
2019-10-07 13:47 ` [PATCH 09/10] rtc: ds1347: use regmap_update_bits Alexandre Belloni
2019-10-07 13:47 ` [PATCH 10/10] rtc: ds1347: handle century register Alexandre Belloni
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