linux-kernel - Re: [PATCH v2 2/5] dt-bindings: clock: google,gs101-clock: Add DPU clock management unit

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Message-ID: <0076e60fb5a4d3a6970d93b4768d4f083baa7a83.camel@linaro.org>
Date: Mon, 12 Jan 2026 14:32:49 +0000
From: André Draszik <andre.draszik@...aro.org>
To: Peter Griffin <peter.griffin@...aro.org>, Tudor Ambarus	
 <tudor.ambarus@...aro.org>, Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzk+dt@...nel.org>,  Conor Dooley <conor+dt@...nel.org>, Alim
 Akhtar <alim.akhtar@...sung.com>, Sylwester Nawrocki	
 <s.nawrocki@...sung.com>, Chanwoo Choi <cw00.choi@...sung.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
 	linux-clk@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>, 
	kernel-team@...roid.com, Will McVicker <willmcvicker@...gle.com>, Juan
 Yescas	 <jyescas@...gle.com>, Doug Anderson <dianders@...gle.com>
Subject: Re: [PATCH v2 2/5] dt-bindings: clock: google,gs101-clock: Add DPU
 clock management unit

On Mon, 2026-01-12 at 14:16 +0000, Peter Griffin wrote:
> Add dt schema documentation and clock IDs for the Display Process Unit
> (DPU) clock management unit (CMU). This CMU feeds IPs such as image scaler,
> enhancer and compressor.
> 
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
> ---
> Changes in v2
>  - alphanumeric placement (Krzysztof)
> ---
>  .../bindings/clock/google,gs101-clock.yaml         | 19 ++++++++++++
>  include/dt-bindings/clock/google,gs101.h           | 36 ++++++++++++++++++++++
>  2 files changed, 55 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml b/Documentation/devicetree/bindings/clock/google,gs101-
> clock.yaml
> index a8176687bb773ae90800b9c256bcccebfdef2e49..00620ab1872db0489dce1823ab500c0062b651f0 100644
> --- a/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
> +++ b/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
> @@ -28,6 +28,7 @@ properties:
>    compatible:
>      enum:
>        - google,gs101-cmu-apm
> +      - google,gs101-cmu-dpu
>        - google,gs101-cmu-hsi0
>        - google,gs101-cmu-hsi2
>        - google,gs101-cmu-misc
> @@ -82,6 +83,24 @@ allOf:
>            items:
>              - const: oscclk
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: google,gs101-cmu-dpu
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: External reference clock (24.576 MHz)
> +            - description: DPU bus clock (from CMU_TOP)
> +
> +        clock-names:
> +          items:
> +            - const: oscclk
> +            - const: bus
> +
>    - if:
>        properties:
>          compatible:
> diff --git a/include/dt-bindings/clock/google,gs101.h b/include/dt-bindings/clock/google,gs101.h
> index 442f9e9037dc33198a1cee20af62fc70bbd96605..4ee46503663c1f8d9463536c347de5d991474145 100644
> --- a/include/dt-bindings/clock/google,gs101.h
> +++ b/include/dt-bindings/clock/google,gs101.h
> @@ -634,4 +634,40 @@
>  #define CLK_GOUT_PERIC1_CLK_PERIC1_USI9_USI_CLK		45
>  #define CLK_GOUT_PERIC1_SYSREG_PERIC1_PCLK		46
>  
> +/* CMU_DPU */

Maybe add this block before hsi0 and after apm to keep alphabetic ordering
of CMU blocks in this file.

Cheers,
Andre'