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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ea4877a6-3032-4710-a563-99230b6f861d@oss.qualcomm.com>
Date: Thu, 5 Feb 2026 11:51:03 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: David Heidelberg <david@...t.cz>, 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 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