[U-Boot] [PATCH 1/3] dm: dts: ls2085a: Bring in ls2085a dts files from linux kernel

Mark Rutland
2015-07-13T09:28:26Z

On Wed, Jul 08, 2015 at 08:31:47AM +0100, Sharma Bhupesh wrote:
> > -----Original Message-----
> > From: U-Boot [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Wang
> > Haikun
> > On 7/8/2015 3:13 PM, Bin Meng wrote:
> > > Hi,
> > >
> > > On Wed, Jul 8, 2015 at 2:51 PM, Wang Haikun <Haikun.Wang@freescale.com>
> > wrote:
> > >> On 6/26/2015 7:53 PM, Haikun Wang wrote:
> > >>> From: Haikun Wang <Haikun.Wang@freescale.com>
> > >>>
> > >>> Bring in required device tree files for ls2085a from Linux.
> > >>> These are initially unchanged and have a number of pieces not needed
> > by U-Boot.
> > >> Hi Simon,
> > >>
> > >> I got below comment when review this patch internal.
> > >> Please help me confirm.
> > >>
> > >> "For new platforms like ARM64, it was discussed to not duplicate the
> > >> DTS in u-boot and Linux, simply because that will break compatibility
> > >> with other bootloaders like Linaro's BootMonitor and UEFI bootloader,
> > >> which do not place the DTS in the bootloader. Also in near future,
> > >> with DTS being replaced by ACPI gradually for ARM64 platforms, it was
> > >> discussed that in a longer run it would be beneficial to move DTS out
> > >> of both u-boot and Linux and maintain it as a separate tree."
> > >>
> > >
> > > I think UEFI + ACPI is only required for ARMv8 servers, not for all
> > > ARMv8 processors. Is ls2085a a processor targeting the server market?
> > No, at least it's not our major market.
> > I want to know whether we have made a conclusion that u-boot will not add
> > Arm64 dts files?
>
> Adding Russell and Mark for their thoughts.
>
> AFAIK there were discussions to generate common DTS files for PPC and ARM platforms,
> where it was discussed that in a longer run it would be beneficial to move DTS out
> of both u-boot and Linux and maintain it as a separate tree.

While I would like to see dts moved out of the kernel, I don't see this
happening in the short term.

I'm not sure what the best strategy is w.r.t. U-Boot and dts.

Thanks,
Mark.