Hi Heinrich,
On Mon, 1 Aug 2022 at 09:00, Heinrich Schuchardt xypron.glpk@gmx.de wrote:
On 8/1/22 15:58, Simon Glass wrote:
At present the sandbox timer uses localtime() which can jump around twice a year when daylight-saving time changes.
It would be tricky to make use of gmtime() since we still need to present the time in local time, as seems to be required by U-Boot's RTC interface.
The problem can only happen once, so use a loop to detect it and try again. This should be sufficient to detect either a change in the 'second' value, or a daylight-saving change. We can assume that the latter also incorporates a 'second' change, so there is no need to loop more than twice.
Signed-off-by: Simon Glass sjg@chromium.org
Linux systems tend to use UTC on the RTC. There is no reason for sandbox_defconfig to deviate. Please, avoid all this complication by reading the time with gmtime() instead of localtime().
That is an API change...how will we show the local time in that case? I suppose we need to add this concept to rtc.h ?
Regards, Simon