On Thu, Apr 08, 2021 at 06:59:19PM +0000, Min Li wrote: > > > > But what does that have to do with the misc device? > > > > Hi Greg, MFD driver is the start of everything. Once MFD driver is loading, > it will spawn 2 devices, > one is for phc driver, which is under /driver/ptp and the other one is for > this misc driver. > Both PHC and misc drivers are operating on the same device. > They are both calling exported functions from mfd drivers to access the > device through i2c/spi > and the register definitions are located in include/Linux/mfd/idt8a340_reg.h > or idt82p33_reg.h > depending on which device was found by mfd driver through device tree node.
I don't think it's a good idea to have the same defines with different values in different files, that's just a problem waiting to happen... good luck! greg k-h
