On Thu, Nov 8, 2018 at 2:49 AM Michal Simek [off-list ref] wrote:

Hi Rob,

On 05. 10. 18 18:58, Rob Herring wrote:

quoted

Convert ARM CPU binding to DT schema format using json-schema.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: devicetree@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/arm/cpus.txt          | 490 -----------------
 .../devicetree/bindings/arm/cpus.yaml         | 503 ++++++++++++++++++
 2 files changed, 503 insertions(+), 490 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/arm/cpus.txt
 create mode 100644 Documentation/devicetree/bindings/arm/cpus.yaml

[...]

I have take a look at xilinx part of this and try to build it for arm64
platforms and I see errors coming from this cpu description.
/root/linux/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dt.yaml:
cpu@0:compatible: ['arm,cortex-a53', 'arm,armv8'] is too long
/root/linux/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dt.yaml:
cpu@0:compatible: Additional items are not allowed ('arm,armv8' was
unexpected)

Thanks for actually giving this a spin!

Based on grep this is used in a lot of places
compatible = "arm,cortex-a53", "arm,armv8";

Should this be moved to just simple?
compatible = "arm,cortex-a53";

I'd normally go with the majority which would be to keep it. However,
'arm,armv8' is of questionable value, isn't actually documented, and
doesn't exist for any other version of the architecture. So we should
kill it IMO.

Paging Mark Rutland and other arm folks...

Rob