From f00eaa38eb0c7185ffff51c5288d00af9032e354 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Mon, 7 Oct 2019 15:47:15 +0200 Subject: rtc: add a timestamp for year 0 A few RTCs handle dates from year 0 to year 9999. Add a timestamp even if years before 1970 will probably never be used. Link: https://lore.kernel.org/r/20191007134724.15505-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni --- include/linux/rtc.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/rtc.h') 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 */ -- cgit v1.2.3 From 8d6ac1cec7251a74c2d2f21e72b842c000206811 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Wed, 16 Oct 2019 22:16:22 +0200 Subject: rtc: add timestamp for end of 2199 Some RTCs handle date up to 2199. Link: https://lore.kernel.org/r/20191016201626.31309-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni --- include/linux/rtc.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/rtc.h') diff --git a/include/linux/rtc.h b/include/linux/rtc.h index 2680f9b2b119..e86a9f307b82 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -165,6 +165,7 @@ struct rtc_device { #define RTC_TIMESTAMP_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */ #define RTC_TIMESTAMP_END_2063 2966371199LL /* 2063-12-31 23:59:59 */ #define RTC_TIMESTAMP_END_2099 4102444799LL /* 2099-12-31 23:59:59 */ +#define RTC_TIMESTAMP_END_2199 7258118399LL /* 2199-12-31 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, -- cgit v1.2.3 From ae4866884338259318be94fa8f88015cced07000 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Sat, 19 Oct 2019 22:50:34 +0200 Subject: rtc: introduce lock helpers Introduce rtc_lock and rtc_unlock to shorten the code when locking and unlocking ops_lock from drivers. Link: https://lore.kernel.org/r/20191019205034.6382-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni --- include/linux/rtc.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/rtc.h') diff --git a/include/linux/rtc.h b/include/linux/rtc.h index e86a9f307b82..4e9d3c71addb 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -159,6 +159,9 @@ struct rtc_device { }; #define to_rtc_device(d) container_of(d, struct rtc_device, dev) +#define rtc_lock(d) mutex_lock(&d->ops_lock) +#define rtc_unlock(d) mutex_unlock(&d->ops_lock) + /* 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 */ -- cgit v1.2.3