Thread (22 messages) 22 messages, 5 authors, 2020-09-17

Re: [PATCH v2 07/10] rtc: Introduce RTC_TIMESTAMP_END_2255

From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: 2020-09-08 09:39:56
Also in: linux-devicetree, linux-pwm, linux-rtc, lkml

On 05/09/2020 15:32:27+0200, Jonathan Neuschäfer wrote:
quoted hunk ↗ jump to hunk
Some RTCs store the year as an 8-bit number relative to the year 2000.
This results in a maximum timestamp of 2255-12-31 23:59:59.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
---

v2:
- New patch
---
 include/linux/rtc.h | 1 +
 1 file changed, 1 insertion(+)
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index 22d1575e4991b..fcc086084a603 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -154,6 +154,7 @@ struct rtc_device {
 #define RTC_TIMESTAMP_END_2079		3471292799LL /* 2079-12-31 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_2255		9025257599LL /* 2255-12-31 23:59:59 */
Honestly, I wouldn't bother adding that one unless you have examples of
other RTCs endng at the same date, I'm fine having the value and comment
directly in the probe function.
 #define RTC_TIMESTAMP_END_9999		253402300799LL /* 9999-12-31 23:59:59 */

 extern struct rtc_device *devm_rtc_device_register(struct device *dev,
--
2.28.0
-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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