[patch v14 4/4] Documentation: jtag: Add ABI documentation
pavel at ucw.cz
Mon Feb 12 10:43:44 AEDT 2018
> @@ -0,0 +1,27 @@
> +What: /dev/jtag[0-9]+
> +Date: October 2017
> +KernelVersion: 4.15
> +Contact: oleksandrs at mellanox.com
> + The misc device files /dev/jtag* are the interface
> + between JTAG master interface and userspace.
> + The ioctl(2)-based ABI is defined and documented in
> + [include/uapi]<linux/jtag.h>.
> + The following file operations are supported:
> + open(2)
> + The argument flag currently support only one access
> + mode O_RDWR.
> + ioctl(2)
> + Initiate various actions.
> + See the inline documentation in [include/uapi]<linux/jtag.h>
> + for descriptions of all ioctls.
I tried reading the jtag.h, and am still not sure how it works. Real docs
would be nice...
In particular, it seems to always specify read or write actiom. Sounds
like a job for read/write syscalls?
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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