On Mon, May 27, 2019 at 1:24 PM Nils Hölscher <nilho...@gmail.com> wrote:
> Hi, > > I tried to rout the PRUs pins via device tree overlay this week. > Sadly I wasn't able to produce results on linux with this method. > Please check my blog post concerning this issue. > > https://nilshoel.home.blog/2019/05/27/setting-up-prus-pins-via-device-tree-files/ > > It would be great if someone having experience with device tree overlay > could get me some feed back. > I will now move on to setting up RTEMS and porting the drivers. > > Hello Nils, I read your blog and had a look at the overlay. From first look at the overlay I noted that you're using `target-path`. I think target-path holds a path string like "/path" instead of a reference to your pruss. Maybe there should be a `target` field and you'll have to seth the target path manually or just remove it if you're not using it. A few pointers that helped me in general, to get an overlay working : * always check for the -@ option while compiling with dtc * before applying using a bootscript in u-boot, it might be a good idea to use the fdtoverlay tool ( in linux host) and apply it on your host system. * If it applies well, then just decompile the dtb with the dtc and have a look at the device you were targeting, if your changes look nice and so far you didn't get any error during the building, open u-boot and manually apply overlay using `fdt apply`. With a quick look these pointers might be helpful. I'm working on porting the i2c stack from FreeBSD to RTEMS and have used an overlay for the path and compatibility. Hope these pointers were of some help. I can explain any of the points above if they're not clear and you can post the error log here as well ( if you luckily get proper error messages ;-) ) Regards, Vijay > Best regards, > Nils Hölscher > _______________________________________________ > devel mailing list > devel@rtems.org > http://lists.rtems.org/mailman/listinfo/devel
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