linux-kernel - Re: [PATCH RFC 3/3] arm64: dts: qcom: qcm6490-fairphone-fp5: Add cam actuator

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Message-ID: <cd083217-27b1-4959-b80d-0189f178208d@fairphone.com>
Date: Thu, 23 Oct 2025 10:37:50 +0200
From: Griffin Kroah-Hartman <griffin.kroah@...rphone.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>,
 Tianshu Qiu <tian.shu.qiu@...el.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>,
 Luca Weiss <luca.weiss@...rphone.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH RFC 3/3] arm64: dts: qcom: qcm6490-fairphone-fp5: Add cam
 actuator

Hi Konrad
On 10/22/25 19:29, Konrad Dybcio wrote:
> On 10/9/25 2:23 PM, Griffin Kroah-Hartman wrote:
>> Add a node for Asahi Kasei AK7377 actuator, used for focus of the main
>> back camera sensor.
>>
>> Signed-off-by: Griffin Kroah-Hartman <griffin.kroah@...rphone.com>
>> ---
>>   arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts | 7 +++++++
>>   1 file changed, 7 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
>> index e115b6a52b299ef663ccfb614785f8f89091f39d..49654f0f914fbe18080d2f55bb6877c8ab7baf0e 100644
>> --- a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
>> +++ b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
>> @@ -616,6 +616,13 @@ &cci0 {
>>   };
>>   
>>   &cci0_i2c0 {
>> +	camera_imx800_ak7377: actuator@c {
>> +		compatible = "asahi-kasei,ak7377";
>> +		reg = <0x0c>;
>> +		vdd-supply = <&vreg_l7p>;
>> +		vio-supply = <&vreg_l7p>;
> 
> The dt-bindings suggest vdd is 2.8 V and vio is 1.8 V (at least
> on AK7375, although this isn't stated explicitly..)

This AK7377 is integrated into a JHS-M15342-A2, which only takes in VDD 
as a power supply. VIO was only added to satisfy the dt-bindings, as we 
are not sure what the exact pin layout the AK7377 has.

> L7P on FP5 is 2.7 V (default) - 3.0 V (which you should probably
> tighten to the actual operating value), please double-check this

I can confirm that L7P is supposed to be 2.8V on the FP5, I will update 
the dts in my next patchset.

> Konrad

Griffin