linux-kernel - Re: [PATCH 0/4] regulator: spacemit-p1: Fix voltage ranges and support board power tree

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Message-ID: <87qzrgenzr.fsf@ocarina.mail-host-address-is-not-set>
Date: Fri, 23 Jan 2026 09:23:36 +0100
From: Javier Martinez Canillas <javierm@...hat.com>
To: Yixun Lan <dlan@...too.org>, Guodong Xu <guodong@...cstar.com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Alex Elder <elder@...cstar.com>, Lee Jones <lee@...nel.org>, Rob Herring
 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Troy Mitchell <troy.mitchell@...ux.spacemit.com>,
 Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>,
 Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
 linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
 spacemit@...ts.linux.dev, devicetree@...r.kernel.org
Subject: Re: [PATCH 0/4] regulator: spacemit-p1: Fix voltage ranges and
 support board power tree

Yixun Lan <dlan@...too.org> writes:

Hello Yixun and Guodong,

> Hi Guodong,
>
> On 17:43 Thu 22 Jan     , Guodong Xu wrote:
>> This series fixes hardware voltage constraints and enables flexible power
>> tree configurations for the SpacemiT P1 PMIC.
>> 
>> Patch 1, n_voltages is corrected to match hardware register widths, as the
>> previous values prevented regulators from reaching higher operational
>> voltages (e.g., 3.3V on LDOs).
>> 
>> Patch 2-4, hardcoded supply assumptions are replaced with explicit
>> devicetree properties. PMIC supply connections are board-design decisions.
>> Moving this to DT allows supporting varied topologies without driver
>> modifications.
>> 
>> Note: Patch 3 introduces a bisect breakage by transitioning to
>> pin-specific supply names. Probe failures will occur on existing board
>> (K1 Bananapi F3) until Patch 4 updates the corresponding DTS file.
> This patch bring system-wide change that not only affect Bananapi F3..
>
> Please also provide fix for other boards, I think you may not be able
> to test all boards, but make sure the patches are available, so people
> who interested can test, P.S I can help on milkv jupiter board
>

I can also help testing on the milkv jupiter board.

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat