linux-kernel - Re: [PATCH] i2c: qcom-geni: fix I2C frequency table to achieve accurate bus rates

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Message-ID: <91100136-bb4d-47e0-b910-b9c940775747@oss.qualcomm.com>
Date: Wed, 30 Jul 2025 15:51:00 +0530
From: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
To: Andi Shyti <andi.shyti@...nel.org>
Cc: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>,
        Viken Dadhaniya <quic_vdadhani@...cinc.com>,
        Manikanta Mylavarapu <quic_mmanikan@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>, linux-i2c@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...nel.org
Subject: Re: [PATCH] i2c: qcom-geni: fix I2C frequency table to achieve
 accurate bus rates


On 7/30/2025 4:12 AM, Andi Shyti wrote:
> Hi Kathiravan,
>
> On Tue, May 13, 2025 at 04:38:33PM +0530, Kathiravan Thirumoorthy wrote:
>> Update the I2C frequency table to match the recommended values
>> specified in the I2C hardware programming guide. In the current IPQ5424
>> configuration where 32MHz is the source clock, the I2C bus frequencies do
>> not meet expectations—for instance, 363KHz is achieved instead of the
>> expected 400KHz.
>>
>> Cc: stable@...nel.org
>> Fixes: 506bb2ab0075 ("i2c: qcom-geni: Support systems with 32MHz serial engine clock")
>> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
> I was sure I did apply this patch, but for some reason it has
> completely slipped from my sight.


Thanks Andi! I was about to remind you on this today :)


>
> Now it's applied in i2c/i2c-host.


Hope it will be part of 6.17 PR.


>
> Thanks,
> Andi