Messages in this thread | | | From | Sven Van Asbroeck <> | Date | Tue, 16 Apr 2019 14:56:24 -0400 | Subject | Re: [PATCH v10 0/7] Add Fieldbus subsystem + support HMS Profinet card |
| |
On Tue, Apr 16, 2019 at 12:49 PM Enrico Weigelt, metux IT consult <lkml@metux.net> wrote: > > > Maybe I'm a bit beaurocratic here, but I really believe that precise > naming is important, eg. for avoiding potential conflicts w/ different > fieldbus classes (eg. mvb) that might come in the future.
I named the subsystem 'fieldbus_dev' because it handles fieldbus devices, not controllers. Granted, it's in the drivers/staging/fieldbus directory, but that's because people objected to the verbosity of fieldbus_dev. In the C code, it's all fieldbus_dev.
> > By the way: any special reason for doing this via device instead of > socket (like we have w/ can) ? >
A fieldbus_dev device communicates with its controller through a section of shared memory (process memory). It just felt more logical to model this as a device which acts like a file. When you read/write the file, you read/write the process memory underneath.
Sven
| |