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

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Message-ID: <3f024bd8-3388-4984-a962-531e3fe88c6a@quicinc.com>
Date: Wed, 21 May 2025 11:55:14 +0530
From: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
To: Andi Shyti <andi.shyti@...nel.org>
CC: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.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

Looks good to me, Thanks Kathiravan, Andi !

On 5/16/2025 2:16 PM, Andi Shyti wrote:
> Hi Mukesh,
> 
> On Fri, May 16, 2025 at 12:23:46AM +0530, Mukesh Kumar Savaliya wrote:
>>>>    /* source_clock = 32 MHz */
>>>>    static const struct geni_i2c_clk_fld geni_i2c_clk_map_32mhz[] = {
>>>> -	{ I2C_MAX_STANDARD_MODE_FREQ, 8, 14, 18, 40 },
>>>> -	{ I2C_MAX_FAST_MODE_FREQ, 4,  3, 11, 20 },
>>>> -	{ I2C_MAX_FAST_MODE_PLUS_FREQ, 2, 3,  6, 15 },
>>>> +	{ I2C_MAX_STANDARD_MODE_FREQ, 8, 14, 18, 38 },
>>>> +	{ I2C_MAX_FAST_MODE_FREQ, 4,  3, 9, 19 },
>>>> +	{ I2C_MAX_FAST_MODE_PLUS_FREQ, 2, 3, 5, 15 },
>>>
>>> argh!
>>>
>>> Can someone from Qualcomm look at this fix? Mukesh, Viken?
>> Yes, I am reviewing internally and verifying the same with latest Guidance
>> and updates. Let me update on this once reviewed.
> 
> thanks a lot! It's very much appreciated!
> 
Reviewed-by: Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>
> Andi