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Message-ID: <26617c83-31b3-4ad9-8a61-0b8271fad41f@linaro.org>
Date: Fri, 22 Dec 2023 09:12:04 +0100
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Subject: Re: [PATCH v2 1/8] dt-bindings: clock: qcom: Allow VDD_GFX supply to
 GX
Content-Language: en-US
To: Bjorn Andersson <quic_bjorande@quicinc.com>,
 Bjorn Andersson <andersson@kernel.org>,
 Konrad Dybcio <konrad.dybcio@linaro.org>,
 Michael Turquette <mturquette@baylibre.com>, Stephen Boyd
 <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>, Taniya Das <quic_tdas@quicinc.com>,
 Ulf Hansson <ulf.hansson@linaro.org>, Johan Hovold
 <johan+linaro@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>,
 Will Deacon <will@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org
References: <20231220-sa8295p-gpu-v2-0-4763246b72c0@quicinc.com>
 <20231220-sa8295p-gpu-v2-1-4763246b72c0@quicinc.com>
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <20231220-sa8295p-gpu-v2-1-4763246b72c0@quicinc.com>
Content-Type: text/plain; charset=UTF-8
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On 22/12/2023 05:39, Bjorn Andersson wrote:
> In some designs the SoC's VDD_GFX pads are supplied by an external
> regulator, rather than a power-domain. Allow this to be described in the
> GPU clock controller binding.
> 
> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
> ---
>  Documentation/devicetree/bindings/clock/qcom,gpucc.yaml | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
> index f369fa34e00c..c0dd24c9dcb3 100644
> --- a/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
> +++ b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
> @@ -53,6 +53,9 @@ properties:
>    power-domains:
>      maxItems: 1
>  
> +  vdd-gfx-supply:
> +    description: Regulator supply for the VDD_GFX pads
> +
>    '#clock-cells':
>      const: 1
>  
> @@ -74,6 +77,19 @@ required:
>    - '#reset-cells'
>    - '#power-domain-cells'
>  
> +# Allow either power-domains or vdd-gfx-supply, not both
> +oneOf:
> +  - required:
> +      - power-domains
> +  - required:
> +      - vdd-gfx-supply

This should be enough, assuming one of them is actually required. The
code. See also:
https://elixir.bootlin.com/linux/v5.17-rc2/source/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml#L91

Best regards,
Krzysztof