linux-kernel - Re: [PATCH 4/4] arm64: dts: qcom: milos-fairphone-fp6: Add camera EEPROMs on CCI busses

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Message-Id: <DFQ3MBO2EAYF.1PRF2111N0U1I@fairphone.com>
Date: Fri, 16 Jan 2026 15:54:58 +0100
From: "Luca Weiss" <luca.weiss@...rphone.com>
To: "Konrad Dybcio" <konrad.dybcio@....qualcomm.com>, "Luca Weiss"
 <luca.weiss@...rphone.com>, "Bartosz Golaszewski" <brgl@...nel.org>, "Rob
 Herring" <robh@...nel.org>, "Krzysztof Kozlowski" <krzk+dt@...nel.org>,
 "Conor Dooley" <conor+dt@...nel.org>, "Loic Poulain"
 <loic.poulain@....qualcomm.com>, "Robert Foss" <rfoss@...nel.org>, "Andi
 Shyti" <andi.shyti@...nel.org>, "Bjorn Andersson" <andersson@...nel.org>,
 "Konrad Dybcio" <konradybcio@...nel.org>
Cc: <~postmarketos/upstreaming@...ts.sr.ht>, <phone-devel@...r.kernel.org>,
 <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH 4/4] arm64: dts: qcom: milos-fairphone-fp6: Add camera
 EEPROMs on CCI busses

On Fri Jan 16, 2026 at 2:59 PM CET, Konrad Dybcio wrote:
> On 1/16/26 2:38 PM, Luca Weiss wrote:
>> Enable the CCI I2C busses and add nodes for the EEPROMs found on the
>> camera that are connected there.
>> 
>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
>> ---
>>  arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts | 50 ++++++++++++++++++++++++
>>  1 file changed, 50 insertions(+)
>> 
>> diff --git a/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts b/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts
>> index 7629ceddde2a..c4a706e945ba 100644
>> --- a/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts
>> +++ b/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts
>> @@ -529,6 +529,56 @@ vreg_l11f: ldo11 {
>>  	};
>>  };
>>  
>> +&cci0 {
>> +	status = "okay";
>> +};
>> +
>> +&cci0_i2c0 {
>> +	/* Main cam: Sony IMX896 @ 0x1a */
>> +
>> +	eeprom@50 {
>> +		compatible = "puya,p24c128f", "atmel,24c128";
>> +		reg = <0x50>;
>> +		vcc-supply = <&vreg_l6p>;
>> +		read-only;
>> +	};
>> +
>> +	/* Dongwoon DW9784 VCM/OIS @ 0x72 */
>> +};
>> +
>> +
>> +&cci0_i2c1 {
>> +	/* Awinic AW86017 VCM @ 0x0c */
>> +	/* UW cam: OmniVision OV13B10 @ 0x36 */
>
> There's a driver for this one!

Yep! Already got patches to add the required regulators & devicetree
support to the driver, but since I've got zero on CAMSS so far, I
couldn't test it more than reading chip ID.

>
>> +
>> +	eeprom@52 {
>> +		compatible = "puya,p24c128f", "atmel,24c128";
>> +		reg = <0x52>;
>> +		vcc-supply = <&vreg_l6p>;
>> +		read-only;
>> +	};
>> +};
>> +
>> +&cci1 {
>> +	/* cci1_i2c0 is not used for CCI */
>> +	pinctrl-0 = <&cci1_1_default>;
>> +	pinctrl-1 = <&cci1_1_sleep>;
>
> Let's keep them per-bus-subnode so we don't have to override it

I don't see any upstream example of that, would the pinctrl work
correctly with that?

While this isn't necessarily pretty like that, it does work :)

>
> otherwise
>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Thanks!

Regards
Luca

>
> Konrad