Messages in this thread | | | Date | Mon, 20 Jun 2011 10:46:08 +1000 | From | Ryan Mallon <> | Subject | Re: [PATCH 00/10] Enhance /dev/mem to allow read/write of arbitrary physical addresses |
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On 20/06/11 10:42, Matthew Wilcox wrote: > On Mon, Jun 20, 2011 at 09:02:17AM +1000, Ryan Mallon wrote: >> There are drivers where this makes sense. For example an FPGA device >> with a proprietary register layout on the memory bus can be done this >> way. The FPGA can simply be mapped in user-space via /dev/mem and >> handled there. If the device requires no access other than memory bus >> reads and writes then writing a custom char device driver just to get an >> mmap function seems a bit overkill. > Calling a 30 line device driver "overkill" might in itself be overkill? > I mean overkill in the sense of having to write the driver at all. Why write a 30 line driver just to re-implement some functionality of /dev/mem?
~Ryan
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