From: Conor Dooley <conor@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
Joshua Yeong <joshua.yeong@starfivetech.com>,
"lgirdwood@gmail.com" <lgirdwood@gmail.com>,
"rahul@summations.net" <rahul@summations.net>,
"anup@brainfault.org" <anup@brainfault.org>,
"lftan.linux@gmail.com" <lftan.linux@gmail.com>,
"robh@kernel.org" <robh@kernel.org>,
"krzk+dt@kernel.org" <krzk+dt@kernel.org>,
"conor+dt@kernel.org" <conor+dt@kernel.org>,
"pjw@kernel.org" <pjw@kernel.org>,
"palmer@dabbelt.com" <palmer@dabbelt.com>,
"aou@eecs.berkeley.edu" <aou@eecs.berkeley.edu>,
"alex@ghiti.fr" <alex@ghiti.fr>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 1/3] dt-bindings: regulator: Add RPMI voltage service bindings
Date: Sat, 26 Sep 2026 22:21:22 +0100 [thread overview]
Message-ID: <20260926-peddling-share-5e5e8dffaa63@spud> (raw)
In-Reply-To: <a5d0d4df-7e8e-4f12-b011-e41b66efd8a7@sirena.org.uk>
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On Fri, Sep 25, 2026 at 06:15:35PM +0100, Mark Brown wrote:
> On Fri, Sep 25, 2026 at 05:18:08PM +0200, Krzysztof Kozlowski wrote:
> > On 25/09/2026 09:14, Joshua Yeong wrote:
>
> > > While the above method works but I'm trying to get the entire simplify to the following.
>
> > > user-app-b {
> > > compatible = "...";
> > > voltage-domains = <&rpmi-voltage 0x01>;
>
> > I see. Why power domains do not fit here?
>
> The spec seems to map very clearly onto voltage regulators, it describes
> voltages in mV:
>
> https://github.com/riscv-non-isa/riscv-rpmi/blob/main/src/srvgrp-voltage.adoc
>
> I really don't see any problem describing this as regulators, it seems
> to fulfil exactly the same role as SCMI regulators, supporting things
> like SD slots where the OS genuinely needs to control voltages on a
> mostly system power controller system.
Unless I misunderstand your intent, me either. The binding permits
having regulator subnodes too, so culling this "voltage-domain" business
and going for the regulators alone shouldn't be much of a shift.
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WARNING: multiple messages have this Message-ID (diff)
From: Conor Dooley <conor@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
Joshua Yeong <joshua.yeong@starfivetech.com>,
"lgirdwood@gmail.com" <lgirdwood@gmail.com>,
"rahul@summations.net" <rahul@summations.net>,
"anup@brainfault.org" <anup@brainfault.org>,
"lftan.linux@gmail.com" <lftan.linux@gmail.com>,
"robh@kernel.org" <robh@kernel.org>,
"krzk+dt@kernel.org" <krzk+dt@kernel.org>,
"conor+dt@kernel.org" <conor+dt@kernel.org>,
"pjw@kernel.org" <pjw@kernel.org>,
"palmer@dabbelt.com" <palmer@dabbelt.com>,
"aou@eecs.berkeley.edu" <aou@eecs.berkeley.edu>,
"alex@ghiti.fr" <alex@ghiti.fr>,
"linux-riscv@lists.infradead.org"
<linux-riscv@lists.infradead.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 1/3] dt-bindings: regulator: Add RPMI voltage service bindings
Date: Sat, 26 Sep 2026 22:21:22 +0100 [thread overview]
Message-ID: <20260926-peddling-share-5e5e8dffaa63@spud> (raw)
In-Reply-To: <a5d0d4df-7e8e-4f12-b011-e41b66efd8a7@sirena.org.uk>
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On Fri, Sep 25, 2026 at 06:15:35PM +0100, Mark Brown wrote:
> On Fri, Sep 25, 2026 at 05:18:08PM +0200, Krzysztof Kozlowski wrote:
> > On 25/09/2026 09:14, Joshua Yeong wrote:
>
> > > While the above method works but I'm trying to get the entire simplify to the following.
>
> > > user-app-b {
> > > compatible = "...";
> > > voltage-domains = <&rpmi-voltage 0x01>;
>
> > I see. Why power domains do not fit here?
>
> The spec seems to map very clearly onto voltage regulators, it describes
> voltages in mV:
>
> https://github.com/riscv-non-isa/riscv-rpmi/blob/main/src/srvgrp-voltage.adoc
>
> I really don't see any problem describing this as regulators, it seems
> to fulfil exactly the same role as SCMI regulators, supporting things
> like SD slots where the OS genuinely needs to control voltages on a
> mostly system power controller system.
Unless I misunderstand your intent, me either. The binding permits
having regulator subnodes too, so culling this "voltage-domain" business
and going for the regulators alone shouldn't be much of a shift.
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next prev parent reply other threads:[~2026-09-26 21:21 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-23 7:00 [PATCH v2 0/3] Add RISC-V RPMI voltage service support Joshua Yeong
2026-09-23 7:00 ` Joshua Yeong
2026-09-23 7:00 ` [PATCH v2 1/3] dt-bindings: regulator: Add RPMI voltage service bindings Joshua Yeong
2026-09-23 7:00 ` Joshua Yeong
2026-09-23 7:25 ` sashiko-bot
2026-09-23 20:35 ` Krzysztof Kozlowski
2026-09-23 20:35 ` Krzysztof Kozlowski
2026-09-24 21:00 ` Mark Brown
2026-09-24 21:00 ` Mark Brown
2026-09-25 2:21 ` Joshua Yeong
2026-09-25 2:21 ` Joshua Yeong
2026-09-25 6:07 ` Krzysztof Kozlowski
2026-09-25 6:07 ` Krzysztof Kozlowski
2026-09-25 7:14 ` Joshua Yeong
2026-09-25 7:14 ` Joshua Yeong
2026-09-25 15:18 ` Krzysztof Kozlowski
2026-09-25 15:18 ` Krzysztof Kozlowski
2026-09-25 17:15 ` Mark Brown
2026-09-25 17:15 ` Mark Brown
2026-09-26 21:21 ` Conor Dooley [this message]
2026-09-26 21:21 ` Conor Dooley
2026-09-27 6:37 ` Joshua Yeong
2026-09-27 6:37 ` Joshua Yeong
2026-09-25 17:20 ` Mark Brown
2026-09-25 17:20 ` Mark Brown
2026-09-25 6:11 ` Krzysztof Kozlowski
2026-09-25 6:11 ` Krzysztof Kozlowski
2026-09-25 17:25 ` Mark Brown
2026-09-25 17:25 ` Mark Brown
2026-09-23 7:00 ` [PATCH v2 2/3] regulator: Add RPMI voltage service Joshua Yeong
2026-09-23 7:00 ` Joshua Yeong
2026-09-23 7:29 ` sashiko-bot
2026-09-23 7:00 ` [PATCH v2 3/3] MAINTAINERS: Add RISC-V RPMI voltage driver Joshua Yeong
2026-09-23 7:00 ` Joshua Yeong
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