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

Pantelis Antoniou pantelis.antoniou at konsulko.com
Sat Jan 10 08:10:51 UTC 2015


Hi Pavel,

> On Jan 9, 2015, at 22:56 , Pavel Machek <pavel at denx.de> wrote:
> 
> 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 at opensource.altera.com wrote:
>>>> +
>>>> +What:		/sys/class/fpga_manager/<fpga>/firmware
>>>> +Date:		October 2014
>>>> +KernelVersion:	3.18
>>>> +Contact:	Alan Tull <atull at 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…?
> 

Who said that udev is going to be available in the kind of system this is going to end in?

Doing ln -s tricks to load a different image? Really?

I say the interface is fine as it is.

Regards

— Pantelis

> 
> -- 
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html



More information about the devel mailing list