linux-kernel - Re: [PATCH v8 3/3] regulator: axp20x: Add support for AXP313a variant

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Message-ID: <TY3P286MB261122217B621C53B6AC1B3198A69@TY3P286MB2611.JPNP286.PROD.OUTLOOK.COM>
Date:   Sat, 18 Feb 2023 18:08:06 +0800
From:   Shengyu Qu <wiagn233@...look.com>
To:     wens@...e.org, Martin Botka <martin.botka@...ainline.org>
Cc:     martin.botka1@...il.com,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Jami Kettunen <jamipkettunen@...ainline.org>,
        Paul Bouchara <paul.bouchara@...ainline.org>,
        Jan Trmal <jtrmal@...il.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Andre Przywara <andre.przywara@....com>,
        Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 3/3] regulator: axp20x: Add support for AXP313a variant

Hi Martin,

> On Sat, Jan 21, 2023 at 2:45 AM Martin Botka
> <martin.botka@...ainline.org> wrote:
>> The AXP313a is your typical I2C controlled PMIC, although in a lighter
>> fashion compared to the other X-Powers PMICs: it has only three DCDC
>> rails, three LDOs, and no battery charging support.
>>
>> The AXP313a datasheet does not describe a register to change the DCDC
>> switching frequency, and talks of it being fixed at 3 MHz. The BSP
>> driver hints at a register being able to change that, but we haven't
>> verified that, so leave that one out. It can be added later, if needed
>> and/or required.
> The datasheet released by MangoPi says this isn't configurable. The
> thing that is configurable is spread-spectrum operation, and mode
> switching between fixed PWM and hybrid PFM/PWM. So just drop the
> DCDC frequency stuff and use the default code path.

You could get full datasheet of AXP313A here:

https://github.com/YuzukiHD/YuzukiChameleon/blob/master/Datasheet/AXP313A_Datasheet_V1.0_cn.pdf

Btw I'm working on AXP15060 support mostly based on your series.


Best regards,

Shengyu


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