From: Rob Herring <robh@kernel.org>
To: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com>
Cc: konrad.dybcio@linaro.org, andersson@kernel.org,
andi.shyti@kernel.org, linux-arm-msm@vger.kernel.org,
dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org, conor+dt@kernel.org,
agross@kernel.org, devicetree@vger.kernel.org, vkoul@kernel.org,
linux@treblig.org, dan.carpenter@linaro.org, Frank.Li@nxp.com,
konradybcio@kernel.org, bryan.odonoghue@linaro.org,
krzk+dt@kernel.org, quic_vdadhani@quicinc.com
Subject: Re: [PATCH v4 1/4] dt-bindindgs: i2c: qcom,i2c-geni: Document shared flag
Date: Fri, 15 Nov 2024 11:31:56 -0600 [thread overview]
Message-ID: <20241115173156.GA3432253-robh@kernel.org> (raw)
In-Reply-To: <20241113161413.3821858-2-quic_msavaliy@quicinc.com>
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@quicinc.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
>
next prev parent reply other threads:[~2024-11-15 17:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-13 16:14 [PATCH v4 0/4] Enable shared SE support over I2C Mukesh Kumar Savaliya
2024-11-13 16:14 ` [PATCH v4 1/4] dt-bindindgs: i2c: qcom,i2c-geni: Document shared flag Mukesh Kumar Savaliya
2024-11-15 17:31 ` Rob Herring [this message]
2024-11-17 17:45 ` Mukesh Kumar Savaliya
2024-11-25 8:11 ` Krzysztof Kozlowski
2024-11-29 14:43 ` Mukesh Kumar Savaliya
2024-11-29 15:12 ` Krzysztof Kozlowski
2024-11-13 16:14 ` [PATCH v4 2/4] dmaengine: gpi: Add Lock and Unlock TRE support to access I2C exclusively Mukesh Kumar Savaliya
2024-11-15 19:23 ` Konrad Dybcio
2024-11-18 5:46 ` Mukesh Kumar Savaliya
2024-11-22 13:40 ` Konrad Dybcio
2024-11-25 5:01 ` Mukesh Kumar Savaliya
2024-11-13 16:14 ` [PATCH v4 3/4] soc: qcom: geni-se: Do not keep GPIOs to sleep state for shared SE usecase Mukesh Kumar Savaliya
2024-11-13 16:14 ` [PATCH v4 4/4] i2c: i2c-qcom-geni: Enable i2c controller sharing between two subsystems Mukesh Kumar Savaliya
2024-11-15 19:28 ` Konrad Dybcio
2024-11-18 5:45 ` Mukesh Kumar Savaliya
2024-11-22 13:42 ` Konrad Dybcio
2024-11-25 5:26 ` Mukesh Kumar Savaliya
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