[PATCH v4 06/10] dts: basic devicetree for Renesas RZ/N1 SoC

[Marek Vasut]

On 3/8/23 21:26, Ralph Siemsen wrote:
> This is taken from Linux kernel 5.17, and contains just bare minimum
> functionality: CPU, UART and system timer.

Why Linux 5.17 and not e.g. 6.2 or 6.1 LTS ?

> Additional functionality (from newer kernel versions) will be added
> later. Note that the Linux side is under active development.
> 
> Signed-off-by: Ralph Siemsen <ralph.siemsen at linaro.org>
> ---
> The following changes were made, compared with Linux 5.17:
> 
> 1) Add node for system controller registers.
>     Declare it as syscon to provide a regmap interface.
> 
> 2) In the clock controller node (renesas,r9a06g032-sysctrl),
>     replace regs with regmap.
> 
> 3) Add syscon-reset node, making use of the syscon regmap.
> 
> 4) Add syscon phandle to ddrctrl. Used for checking h/w version.
> 
> 5) Simplify the compatible string for all the UARTS, as per
>     doc/device-tree-bindings/serial/snps-dw-apb-uart.txt
> 
> I could not find a way to avoid 1) and 2). Putting "syscon" in the
> compatible string for the clock controller leads to a catch-22,
> where the driver fails to initialize, and then boot hangs.

Can you extract all the changes to arch/arm/dts/r9a06g032-u-boot.dtsi 
and include that u-boot dtsi in your board DT, so the 
arch/arm/dts/r9a06g032.dtsi can be synchronized with Linux with ease due 
to no changes in it ?