Re: [PATCH v8 2/4] fpga manager: add sysfs interface document

Pavel Machek
2015-01-09T20:56:49Z

On Fri 2015-01-09 13:14:24, atull wrote:
> On Wed, 7 Jan 2015, Pavel Machek wrote:
>
> > On Tue 2015-01-06 14:13:37, atull@opensource.altera.com wrote:
> > > +
> > > +What: /sys/class/fpga_manager/<fpga>/firmware
> > > +Date: October 2014
> > > +KernelVersion: 3.18
> > > +Contact: Alan Tull <atull@opensource.altera.com>
> > > +Description: Name of the FPGA image file to load using firmware
> > > class.
> >
> > This one is ugly: it unneccessarily passes firmware name through the
> > kernel. Just make interface and code simpler by always passing
> > "socfpga-fpga-image" or something like that.
> >
> > Thanks,
> > Pavel
>
> Hi Pavel,
>
> It might be ugly. It's not unnecessary. Some uses of FPGAs involve
> switching out the FPGA images dynamically under control of the userspace.

Then configure udev to load right firmware for you, or ln -s
image-i-want-now socfpga-fpga-image to select the one to read...?

Pavel
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