On Tue, Aug 20, 2019 at 1:24 PM Mark Brown <broonie@xxxxxxxxxx> wrote: > > On Fri, Aug 16, 2019 at 02:40:47PM -0500, Li Yang wrote: > > On Fri, Aug 16, 2019 at 11:30 AM Alexandre Belloni > > > > Most of the i2c RTCs do address wrapping which is sometimes the only way > > > to properly set the time. > > > Adding Mark and Nandor to the loop. > > Is there a specific question or something here? Some of the RTC hardware has the capability of address wrapping which means if you access a continuous address range across a certain boundary(could be the boundary of a regmap region) the hardware actually wrap the access to a lower address. But the address violation check of regmap rejects such access. According to Alexcandre, the address wrapping is essential to the functionality of some RTC devices and can improve performance for some others. We are wondering if it is reasonable to have regmap support this address wrapping. Regards, Leo
