linux-kernel - Re: [PATCH] testing! arm64: dts: qcom: decrease WiFi antenna regulator minimum to 3.0V

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Message-ID: <8d54edae-23d3-43ce-8a99-7c4791a4b857@ixit.cz>
Date: Thu, 5 Feb 2026 12:46:43 +0100
From: David Heidelberg <david@...t.cz>
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>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org
Subject: Re: [PATCH] testing! arm64: dts: qcom: decrease WiFi antenna
 regulator minimum to 3.0V

On 05/02/2026 11:51, Konrad Dybcio wrote:
> On 2/5/26 10:58 AM, David Heidelberg wrote:
>> On 05/02/2026 10:05, Konrad Dybcio wrote:
>>> On 2/4/26 6:03 PM, David Heidelberg via B4 Relay wrote:
>>>> From: David Heidelberg <david@...t.cz>
>>>>
>>>> Downstream defines minimal voltage as 3.0 V, while when OnePlus 6 was
>>>> introduced to Linux mainline, the value was fixed to maximum 3.3V.
>>>>
>>>> Signed-off-by: David Heidelberg <david@...t.cz>
>>>> ---
>>>> Tested for ~ 1 month. Seems to work well, no visible issues anywhere.
>>>> ---
>>>>    arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi | 4 ++--
>>>>    1 file changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
>>>> index 5b121ea5520f5..e950db41ce25a 100644
>>>> --- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
>>>> +++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
>>>> @@ -307,7 +307,7 @@ vreg_l20a_2p95: ldo20 {
>>>>            };
>>>>              vreg_l23a_3p3: ldo23 {
>>>> -            regulator-min-microvolt = <3300000>;
>>>> +            regulator-min-microvolt = <3000000>;
>>>>                regulator-max-microvolt = <3312000>;
>>>>                regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
>>>>            };
>>>> @@ -320,7 +320,7 @@ vreg_l24a_3p075: ldo24 {
>>>>            };
>>>>              vreg_l25a_3p3: ldo25 {
>>>> -            regulator-min-microvolt = <3300000>;
>>>> +            regulator-min-microvolt = <3000000>;
>>>>                regulator-max-microvolt = <3312000>;
>>>
>>> A datasheet tells me this is out of spec for this wireless chip
>>
>> As I don't have the datasheet, can you clarify if the 3.3 - 3.312V is the correct range which should be kept?
> 
> These settings are OK.
> 
> Konrad

Good, I'm dropping the patch then!
Thank you
David

-- 
David Heidelberg