Hello Stefan On 01.09.20 13:46, Stefan Kalkowski wrote: > The Attached_mmio abstraction from the `os/include/os/attached_mmio.h` > header is no appropriated one for your use-case anymore. Instead you > might use the Attached_dataspace abstraction to map the I/O memory > into the address space, and put the resulting "local_addr" into the > Mmio abstraction explicitly. That is the one you have used before for > the register definitions and access.
Many thanks. With this I can initialize an Mmio structure that represents the registers of the device. But as soon I try to read from a register the driver terminates with the following error: Kernel: MMU-fault not handled ESR=0x92000210 Kernel: init -> i2c2_drv -> ep raised unhandled MMU fault ip=0x1009930 fault-addr=0x20008 type=unknown Writing to a register never returns. If I change the base address to 0x30B5000 (usdhc2) the read succeeds. I had the same error before the update without using `platform_drv`, which led me to think, that maybe the clocks for the subsystem aren't initialized. But this is now done by `platform_drv`. Best regards, Pirmin
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