Re: [PATCH v6 2/5] dt-bindings: clock: add Amlogic T7 SCMI clock controller

[Jian Hu]

Hi, Krzysztof


Thans for your review.

On 12/8/2025 2:17 PM, Krzysztof Kozlowski wrote:
> [ EXTERNAL EMAIL ]
>
> On Thu, Dec 04, 2025 at 01:36:31PM +0800, Jian Hu wrote:
> > Add DT bindings for the SCMI clock controller of the Amlogic T7 SoC family.
> >
> > Signed-off-by: Jian Hu <jian.hu@xxxxxxxxxxx>
> > Acked-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
> > ---
> >   include/dt-bindings/clock/amlogic,t7-scmi.h | 47 +++++++++++++++++++++
> >   1 file changed, 47 insertions(+)
> >   create mode 100644 include/dt-bindings/clock/amlogic,t7-scmi.h
> Where is any binding doc for this? Why is this a separate patch?


The ARM SCMI device tree binding specification is located at 
./Documentation/devicetree/bindings/firmware/arm,scmi.yaml.

Certain secure clocks on the T7 rely on the ARM SCMI driver stack, which 
is officially supported by ARM.

The kernel-side SCMI client implementation resides in 
./drivers/firmware/arm_scmi/.

To enable ARM SCMI on T7, three components are needed:

- Kernel-side definition of ARM SCMI clock indices (this patch addresses 
this component);
- SCMI server implementation in the ARM Trusted Firmware (ATF) running 
at Exception Level 3 (EL3), which has been integrated into the bootloader;
- Device Tree Source (DTS) configuration for ARM SCMI clock nodes (the 
DTS changes will be submitted after the T7 clock driver patches are 
merged upstream).


> Best regards,
> Krzysztof