linux-kernel - Re: [PATCH v1 1/7] dt-bindings: i2c: qcom,i2c-geni: Document DT properties for QUP firmware loading

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Message-ID: <0a85859a-9487-48fd-b1cb-a4a4195a8e63@linaro.org>
Date: Wed, 4 Dec 2024 16:25:23 +0100
From: neil.armstrong@...aro.org
To: Viken Dadhaniya <quic_vdadhani@...cinc.com>, andi.shyti@...nel.org,
 robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 gregkh@...uxfoundation.org, jirislaby@...nel.org, broonie@...nel.or,
 andersson@...nel.org, konradybcio@...nel.org, johan+linaro@...nel.org,
 dianders@...omium.org, agross@...nel.org, linux-arm-msm@...r.kernel.org,
 linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
 linux-spi@...r.kernel.org
Cc: =quic_msavaliy@...cinc.com, quic_anupkulk@...cinc.com,
 Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
Subject: Re: [PATCH v1 1/7] dt-bindings: i2c: qcom,i2c-geni: Document DT
 properties for QUP firmware loading

On 04/12/2024 16:03, Viken Dadhaniya wrote:
> Document the 'qcom,load-firmware' and 'qcom,xfer-mode' properties to
> support SE(Serial Engine) firmware loading from the protocol driver and to
> select the data transfer mode, either GPI DMA (Generic Packet Interface)
> or non-GPI mode (PIO/CPU DMA).
> 
> I2C controller can operate in one of two modes based on the
> 'qcom,xfer-mode' property, and the firmware is loaded accordingly.
> 
> Co-developed-by: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
> Signed-off-by: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
> Signed-off-by: Viken Dadhaniya <quic_vdadhani@...cinc.com>
> ---
>   .../devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml   | 11 +++++++++++
>   1 file changed, 11 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> index 9f66a3bb1f80..a26f34fce1bb 100644
> --- a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> @@ -66,6 +66,15 @@ properties:
>     required-opps:
>       maxItems: 1
>   
> +  qcom,load-firmware:
> +    type: boolean
> +    description: Optional property to load SE (serial engine) Firmware from protocol driver.
> +
> +  qcom,xfer-mode:
> +    description: Value 1,2 and 3 represents FIFO, CPU DMA and GSI DMA mode respectively.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [1, 2, 3]

In the code, FIFO mode is default if not specified, please precise it in the
bindings aswell.

Thanks,
Neil

> +
>   required:
>     - compatible
>     - interrupts
> @@ -142,5 +151,7 @@ examples:
>           interconnect-names = "qup-core", "qup-config", "qup-memory";
>           power-domains = <&rpmhpd SC7180_CX>;
>           required-opps = <&rpmhpd_opp_low_svs>;
> +        qcom,load-firmware;
> +        qcom,xfer-mode = <1>;
>       };
>   ...