linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: add basic devicetree for Ayaneo Pocket S2 gaming console

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <687b781c-dee6-4b8e-89b2-e082a860be3a@oss.qualcomm.com>
Date: Thu, 22 Jan 2026 13:34:35 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Kancy Joe <kancy2333@...look.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov
 <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org
Subject: Re: [PATCH 3/3] arm64: dts: qcom: add basic devicetree for Ayaneo
 Pocket S2 gaming console

On 1/22/26 10:34 AM, Kancy Joe wrote:
> 
> On 1/22/2026 5:25 PM, Neil Armstrong wrote:
>> On 1/22/26 10:15, Konrad Dybcio wrote:
>>> On 1/21/26 5:40 PM, Neil Armstrong wrote:
>>>> From: KancyJoe <kancy2333@...look.com>
>>>>
>>>> Add initial Device Tree for the Ayaneo Pocket S2 gaming console based
>>>> on the Qualcomm Snapdragon 8 Gen 3 platform.
>>>>
>>>> The design is similar to a phone wihout the modem, the game control
>>>> is handled via a standalone controller connected to a PCIe USB
>>>> controller.
>>>>
>>>> Display support will be added in a second time.
>>>>
>>>> Signed-off-by: KancyJoe <kancy2333@...look.com>
>>>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
>>>> ---

[...]

>>>> +        pinctrl-names = "default",
>>>> +                "sleep";
>>>> +
>>>> +        pwms = <&pm8550_pwm 3 50000>;
>>>> +
>>>> +        #cooling-cells = <2>;
>>>> +        cooling-levels = <0 16 32 45 60 80 105 130 155 180 205 230 255>;
>>>
>>> Does this come from a preexisting map?
>>
>> Kancy ?
> 
> No it is not a preexisting map. I add it(and the thermal part) myself to get dynamic fan speed control work. Perhaps you can also use userspace fan control daemon instead of hardcode it here. In android the vendor control the fan speed in userspace too.
> 
> Following block is what the stock fw defined. I changed the granularity to make fan speed (or noise actually) sounds more "smooth".
> 
> ```
> 
> cooling-levels = <0 64 128 255>;
> 
> ```

FWIW the corresponding pwm-backlight driver has this
num-interpolated-steps property which computes a smooth map.. not sure how
many cooling levels are resonable for a PWM fan, but then I would intuitively
not object to having more as opposed to less..

Konrad