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Date: Tue, 28 Nov 2023 11:50:43 -0600
From: Rob Herring <robh@kernel.org>
To: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Cc: Andy Gross <agross@kernel.org>, Konrad Dybcio <konrad.dybcio@linaro.org>, linux-arm-msm@vger.kernel.org, Conor Dooley <conor+dt@kernel.org>, linux-i2c@vger.kernel.org, Bjorn Andersson <andersson@kernel.org>, devicetree@vger.kernel.org, Rob Herring <robh+dt@kernel.org>, Andi Shyti <andi.shyti@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Wolfram Sang <wsa@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: i2c: qcom,i2c-qup: Document
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Message-ID: <170119384299.3558042.16570050685219683863.robh@kernel.org>
References: <20231128-i2c-qup-dvfs-v1-0-59a0e3039111@kernkonzept.com>
 <20231128-i2c-qup-dvfs-v1-1-59a0e3039111@kernkonzept.com>
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In-Reply-To: <20231128-i2c-qup-dvfs-v1-1-59a0e3039111@kernkonzept.com>


On Tue, 28 Nov 2023 10:48:35 +0100, Stephan Gerhold wrote:
> Similar to qcom,geni-i2c, for i2c-qup we need to vote for performance
> states on the VDDCX power domain to ensure that required clock rates
> can be generated correctly.
> 
> I2C is typically used with a fixed clock rate, so a single required-opp
> is sufficient without a full OPP table (unlike spi-qup for example).
> 
> Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
> ---
>  Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>