On Wed, Oct 17, 2018 at 04:18:41PM +0100, Andre Przywara wrote:
On Tue, 16 Oct 2018 22:09:30 -0700 Vasily Khoruzhick anarsoul@gmail.com wrote:
Hi,
Updates the device tree file from the the Linux tree as of v4.19-rc4, exactly Linux commit:
Does this work easily without syncing the .dts files as well?
commit 7876320f8880 (tag: v4.19-rc4) Author: Linus Torvalds torvalds@linux-foundation.org Date: Sun Sep 16 11:52:37 2018 -0700
Linux 4.19-rc4So this sounds like the right thing to do, but in this particular case breaks Ethernet with UEFI booting in all distribution installers or kernels out there (except >= Linux 4.19-rc1). I consider this a major use case of U-Boot's DTB, so what do we do about this? The reason is that we dropped the "syscon" compatible string at the end of the system-controller node, which older kernels rely on to find the syscon node. I suggested to re-add this[1], but didn't have much success, unfortunately. The easiest would be to re-add (or not remove) "syscon" for U-Boot's copy, but this would mean a deviation from the Linux DT's. I am fine with this, but would like to hear more opinions.
tl; dr: You want to build something robust on top of assumptions that have never been guaranteed. I'm fine with having it as a U-Boot addition, if it's what it takes.
Maxime