Hi Phil, Alan
Am Montag, 25. Juli 2016, 17:28:08 schrieb Phil Reid:
> >> So looks like possible fpga region is not getting mapped correctly and
> >> I'm
> >> not sure where this is done. New one for me. The fpga-region stuff may be
> >> related:
> >>
> >> base_fpga_region {
> >>
> >> compatible = "fpga-region";
> >> fpga-mgr = <&fpga_mgr>;
> >> fpga-bridges = <&fpga_bridge0>, <&fpga_bridge1>;
> >>
> >> #address-cells = <0x1>;
> >> #size-cells = <0x1>;
> >> ranges = <0 0xff200000 0x100000>;
> >
> > Shouldn't this look like this:
> > ranges = <0 0x0 0xc0000000 0x20000000>,
> >
> > <1 0x0 0xff200000 0x00200000>;
> >
> > or if you would like to keep your indexes:
> > ranges = <0 0x0 0xff200000 0x00200000>,
> >
> > <1 0x0 0xc0000000 0x20000000>;
> >>
> >> };
> >>
> >> The dtsi only reference the lw h2f range, not sure if that's related.
> >> Someone with a bit more knowledge may be able to offer some advice.
> >
> > I am currently still chewing on the configs you sent me...
Ok, now i have found a way to use the fpga areas:
Disable Bridges and Region driver in the dts and initialize anything in the
bootloader. As soon as i try to enable any bridges i am unable to access the
hardware control registers of the bridges. Bridge id register: 0xFF401FD0
gives a bus error on access!
But i have a hard time beliving that this is the proper fix. As this also means
that i can't use dts overlays. And it seems to me that people are clearly
using these here on the mailing list.
But so far i was not able to get something working with 4.1, 4.4 or 4.6 kernel
series?!? This shouldn't be that hard and there should be definetly some
examples for this! The 4.1 kernel is out for more than a year.
> Yeap that worked for me. I can now 'devmem2 0xc0000000' and get something
> meaningful. Thanks for the suggestion.
You are welcome.
Best regards
Tim
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