Re: [PATCH 2/4] dt-bindings: power: mt8196-gpufreq: Describe nvmem provider ability

["Rob Herring (Arm)" <robh@kernel.org>]

On Wed, 17 Dec 2025 18:03:28 +0100, Nicolas Frattaroli wrote:
> On the MediaTek MT8196 SoC, the Mali GPU's "shader_present" hardware
> register may also include a non-functional shader core, along with the
> present shader cores. An efuse elsewhere in the SoC provides the
> shader_present mask with the fused off core omitted.
> 
> However, the efuse address is not publicly disclosed. What is known
> though is that the GPUEB MCU reads this efuse, and exposes its contents
> in the memory it shares with the application processor.
> 
> We can therefore describe the mediatek,mt8196-gpufreq device as being an
> nvmem provider for this purpose, as it does provide nvmem access in an
> indirect way.
> 
> The shader-present child node is left out of the list of required
> properties as we may one day be able to describe the actual efuse region
> this value comes from, so the gpufreq device isn't necessarily the only
> device that can provide this cell, and implementations shouldn't need to
> implement this functionality once this is the case.
> 
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
> ---
>  .../devicetree/bindings/power/mediatek,mt8196-gpufreq.yaml  | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 

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