Re: [PATCH 1/7] dt-bindings: sram: Document Allwinner H616 VE SRAM

Rob Herring (Arm)
2026-04-07T17:51:42Z

On Wed, 25 Mar 2026 00:43:49 +0800, Chen-Yu Tsai wrote:
> The Allwinner H616 has two switchable peripheral SRAM regions:
>
> - The VE SRAM is a 2 MB dedicated SRAM for the Video Engine. CPU access
> to this region is enabled by default. CPU access can be disabled,
> after which reads will show the same stale value for all addresses,
> while writes are ignored.
>
> The mux value for this region is different from previous generations,
> and thus needs a completely new compatible.
>
> - The SRAM C region is an alias of the first 128 KB of VE SRAM, plus 64
> KB of DE SRAM. The latter is otherwise unaccessible from the CPU. When
> CPU access is disabled, the whole region reads as zero, while writes
> are ignored.
>
> The mux value for this region is the same as on the A64 and H6. The
> existing compatible for the A64 already covers this.
>
> Add the compatible for the VE SRAM to the list of covered compatibles in
> the generic SRAM region binding.
>
> Signed-off-by: Chen-Yu Tsai <wens@kernel.org>
> ---
> Documentation/devicetree/bindings/sram/sram.yaml | 1 +
> 1 file changed, 1 insertion(+)
>

Acked-by: Rob Herring (Arm) <robh@kernel.org>