On Tue, Feb 11, 2025 at 04:59:53PM +0000, Sudeep Holla wrote: >On Tue, Jan 21, 2025 at 02:31:55PM +0000, Peng Fan wrote: >> >> It is the i.MX SCMI Protocol exports two RTCs using one protocol. >> >> Two RTC devices are created, but share one parent device. >> >> Do you mean each RTC device should have a unique parent device? >> > >Can you point where is this check for unique parent ? I am not so familiar >with RTC but I couldn't find myself with quick search. The RTC ops takes the rtc parent as input parameter https://elixir.bootlin.com/linux/v6.13.2/source/drivers/rtc/interface.c#L94 "err = rtc->ops->read_time(rtc->dev.parent, tm);" So in the rtc device driver, there is no way to know which rtc it is just from the parent device. However i.MX SCMI BBM exports two RTCs(id: 0, id: 1), so to make it work for current RTC framework, we could only pick one RTC and pass the id to BBM server side. I am not sure whether Alexandre wanna me to update the code following each parent could only support one RTC or else. Regards Peng > >-- >Regards, >Sudeep
