On 03/10/2019 14:21:50+0200, Lukasz Majewski wrote: > > > > See the datasheet: > > > > "During any year which is a multiple of 4, the RV-4162 RTC will > > automatically insert leap day, February 29. Therefore, the > > application software must correct for this during the exception years > > (2100, 2200, etc.) as noted above." > > I'm wondering what the phrase "application software" means here? > > If it is the userland SW, then we shall at least be able to set 2099 in > this device and then count on software correction. > > If the "application software" is the kernel driver - the date > correction shall be done there (maybe some lookup table?). > > Personally, I do prefer the first option - this means that with this > patch we can set the time to e.g. 2234 year and then rely on userland > software (or libc) to do the correction. > It is not possible to ensure this correction is properly done in software, there is no point in letting the user set those bits. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
