Messages in this thread | | | Date | Fri, 31 Mar 2023 15:06:00 +0200 | From | "Arnd Bergmann" <> | Subject | Re: [PATCH] mfd: syscon: Use of_io_request_and_map() for IO mapping |
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On Thu, Mar 30, 2023, at 15:22, Loic Poulain wrote: > On Thu, 30 Mar 2023 at 14:45, Arnd Bergmann <arnd@arndb.de> wrote: >> On Thu, Mar 30, 2023, at 13:42, Lee Jones wrote: >> > On Mon, 20 Mar 2023, Loic Poulain wrote: >> >> Thanks for pinging me. I would indeed expect this to cause >> problems, as syscon mappings are likely to be used in a way >> that is not entirely clean, with other devices defining >> overlapping ranges. > > Isn't syscon exactly here to address that collision/overlapping issue? > From a syscon perspective, it seems to be handled correctly at least > since the mapping is only setup once, with the first user device (in > syscon_node_to_regmap). Or are you thinking about non syscon devices > overlapping the syscon area?
I meant them overlapping with other devices. Ideally this should not exist, but most likely we have to deal with dtb files where some other device does overlap with a syscon.
Arnd
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