linux-kernel - Re: [PATCH 1/6] dt-bindings: clock: qcom: Add CMN PLL support for IPQ5018 SoC

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Message-ID: <20250502141730.GA1259057-robh@kernel.org>
Date: Fri, 2 May 2025 09:17:30 -0500
From: Rob Herring <robh@...nel.org>
To: George Moussalem <george.moussalem@...look.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Luo Jie <quic_luoj@...cinc.com>,
	Lee Jones <lee@...nel.org>, Konrad Dybcio <konradybcio@...nel.org>,
	linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] dt-bindings: clock: qcom: Add CMN PLL support for
 IPQ5018 SoC

On Fri, May 02, 2025 at 02:15:43PM +0400, George Moussalem wrote:
> The CMN PLL block in the IPQ5018 SoC takes 96 MHZ as the reference
> input clock. Its output clocks are the XO (24Mhz), sleep (32Khz), and
> ethernet (50Mhz) clocks.
> 
> Unlike IPQ9574, the CMN PLL to the ethernet block needs to be enabled
> first in IPQ5018. Hence, add optional phandle to TCSR register space
> and offset to do so.
> 
> Signed-off-by: George Moussalem <george.moussalem@...look.com>
> ---
>  .../devicetree/bindings/clock/qcom,ipq9574-cmn-pll.yaml  | 11 ++++++++---
>  include/dt-bindings/clock/qcom,ipq5018-cmn-pll.h         | 16 ++++++++++++++++
>  2 files changed, 24 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,ipq9574-cmn-pll.yaml b/Documentation/devicetree/bindings/clock/qcom,ipq9574-cmn-pll.yaml
> index cb6e09f4247f4b25105b25f4ae746c0b3ef47616..25006d65d30e20ef8e1f43537bcf3dca65bae73d 100644
> --- a/Documentation/devicetree/bindings/clock/qcom,ipq9574-cmn-pll.yaml
> +++ b/Documentation/devicetree/bindings/clock/qcom,ipq9574-cmn-pll.yaml
> @@ -24,12 +24,10 @@ description:
>  properties:
>    compatible:
>      enum:
> +      - qcom,ipq5018-cmn-pll
>        - qcom,ipq5424-cmn-pll
>        - qcom,ipq9574-cmn-pll
>  
> -  reg:
> -    maxItems: 1
> -
>    clocks:
>      items:
>        - description: The reference clock. The supported clock rates include
> @@ -50,6 +48,13 @@ properties:
>    "#clock-cells":
>      const: 1
>  
> +  qcom,cmn-pll-eth-enable:
> +    description: Register in TCSR to enable CMN PLL to ethernet
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    items:
> +        - description: phandle of TCSR syscon
> +        - description: offset of TCSR register to enable CMN PLL to ethernet

items:
  - items:
      - description: phandle of TCSR syscon
      - description: offset of TCSR register to enable CMN PLL to ethernet