linux-kernel - Re: [PATCH v4 1/4] dt-bindindgs: i2c: qcom,i2c-geni: Document shared flag

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Message-ID: <20241115173156.GA3432253-robh@kernel.org>
Date: Fri, 15 Nov 2024 11:31:56 -0600
From: Rob Herring <robh@...nel.org>
To: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
Cc: konrad.dybcio@...aro.org, andersson@...nel.org, andi.shyti@...nel.org,
	linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
	conor+dt@...nel.org, agross@...nel.org, devicetree@...r.kernel.org,
	vkoul@...nel.org, linux@...blig.org, dan.carpenter@...aro.org,
	Frank.Li@....com, konradybcio@...nel.org,
	bryan.odonoghue@...aro.org, krzk+dt@...nel.org,
	quic_vdadhani@...cinc.com
Subject: Re: [PATCH v4 1/4] dt-bindindgs: i2c: qcom,i2c-geni: Document shared
 flag

On Wed, Nov 13, 2024 at 09:44:10PM +0530, Mukesh Kumar Savaliya wrote:
> Adds qcom,is-shared flag usage. Use this flag when I2C serial controller

Doesn't match the property name.

> needs to be shared in multiprocessor system(APPS,Modem,ADSP) environment.
> 
> Two clients from different processors can share an I2C controller for same
> slave device OR their owned slave devices. Assume I2C Slave EEPROM device
> connected with I2C controller. Each client from ADSP SS and APPS Linux SS
> can perform i2c transactions.
> 
> Transfer gets serialized by Lock TRE + DMA xfer + Unlock TRE at HW level.
> 
> Signed-off-by: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
> ---
>  Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml | 4 ++++
>  1 file changed, 4 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..fe36938712f7 100644
> --- a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> @@ -60,6 +60,10 @@ properties:
>    power-domains:
>      maxItems: 1
>  
> +  qcom,shared-se:

What is 'se'? Is that defined somewhere?

> +    description: True if I2C controller is shared between two or more system processors.
> +    type: boolean
> +
>    reg:
>      maxItems: 1
>  
> -- 
> 2.25.1
>