On 19/08/2022 12:39, Lad, Prabhakar wrote:

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Hi Geert,


On Fri, Aug 19, 2022 at 9:25 AM Geert Uytterhoeven [off-list ref] wrote:

quoted

Hi Prabhakar,

On Mon, Aug 15, 2022 at 10:16 PM Lad, Prabhakar
[off-list ref] wrote:

quoted

On Mon, Aug 15, 2022 at 8:00 PM [off-list ref] wrote:

quoted

On 15/08/2022 16:14, Lad Prabhakar wrote:

quoted

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Enable the minimal blocks required for booting the Renesas RZ/Five
SMARC EVK with initramfs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
v1->v2
* New patch
---
 arch/riscv/boot/dts/Makefile                  |  1 +
 arch/riscv/boot/dts/renesas/Makefile          |  2 ++
 .../boot/dts/renesas/r9a07g043f01-smarc.dts   | 16 ++++++++++
 .../boot/dts/renesas/rzfive-smarc-som.dtsi    | 22 +++++++++++++
 arch/riscv/boot/dts/renesas/rzfive-smarc.dtsi | 32 +++++++++++++++++++
 5 files changed, 73 insertions(+)
 create mode 100644 arch/riscv/boot/dts/renesas/Makefile
 create mode 100644 arch/riscv/boot/dts/renesas/r9a07g043f01-smarc.dts
 create mode 100644 arch/riscv/boot/dts/renesas/rzfive-smarc-som.dtsi

Just to sort out some of my own confusion here - is the smarc EVK
shared between your arm boards and the riscv ones? Or just the
peripherals etc on the soc?

RZ/Five SoC is pin compatible with RZ/G2UL Type 1 SoC (ARM64). RZ/G2UL
SMARC EVK carrier board can be swapped with RZ/Five or RZ/G2UL SMARC
SoM and still be used.

quoted

If it is the forver, does the approach suggested here for the
allwinner stuff make sense to also use for risc-v stuff with
shared parts of devicetrees?
https://lore.kernel.org/linux-riscv/3cd9ed5b-8348-38ac-feb1-9a7da858cebc@microchip.com/ (local)

it does make sense. But I wonder where we would place the common
shared dtsi that can be used by two arch's.

You can keep it under arch/arm/boot/dts/renesas/, and refer to
it from riscv as <arm64/renesas/...>.
Cfr. the symlinks under scripts/dtc/include-prefixes/arm64/ and
e.g. cros-ec-keyboard.dtsi.

Is this something that you intend doing or is that future work?
I had a quick, and I mean quick, look through the arm smarc dtsi
and none of them appeared to be a 1:1 match with what I see here.

I assume that's got something to do with the "minimal" in the
patch's subject line, and some re-org of the arm files would be
required? In any case, you've not introduced any more dtbs_check
detectable issues so you're good in my book whichever way you do
it.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>