On Thu, Nov 2, 2023 at 9:15 AM Patryk <pbiel7@xxxxxxxxx> wrote: > > Hi, I want to have two devices on the same SPI bus. > > These devices are: > > - SPI nor flash (QSPI compatible) > > - my custom device (SPI compatible). > > For SPI NOR flash I have the driver in the kernel, for my custom device I do not have such a driver. > > My question is - how the access to this particular SPI peripheral can be serialized between these two drivers in order to prevent simultaneous access that would result in a mess on the SPI? Do I have to modify the existing driver for SPI NOR flash or not? > > How about different configurations for these devices - as I mentioned one is QSPI compatible whereas the other one is SPI compatible. Can I reconfigure the SPI bus driver before each "transaction"? > > > Best regards > > Patryk > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies To share the SPI bus between two devices just put them difirent chip select pins. Can you use regmap for what you trying to do? _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
