Re: [PATCH v7 5/7] PCI: brcmstb: Add control of subdevice voltage regulators

From: Jim Quinlan <james.quinlan@broadcom.com>
To: Mark Brown <broonie@kernel.org>
Cc: "Jim Quinlan" <jim2101024@gmail.com>,
	"open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS"
	<linux-pci@vger.kernel.org>,
	"Nicolas Saenz Julienne" <nsaenz@kernel.org>,
	"Rob Herring" <robh@kernel.org>,
	"maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE"
	<bcm-kernel-feedback-list@broadcom.com>,
	"Florian Fainelli" <f.fainelli@gmail.com>,
	"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
	<linux-rpi-kernel@lists.infradead.org>,
	"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
	<linux-arm-kernel@lists.infradead.org>,
	"open list" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v7 5/7] PCI: brcmstb: Add control of subdevice voltage regulators
Date: Wed, 3 Nov 2021 17:53:32 -0400	[thread overview]
Message-ID: <CA+-6iNwshLwTaHuh+BezmqjGi7wRnFUqa2HvKestecOy06qj8g@mail.gmail.com> (raw)
In-Reply-To: <YYMEkjlbFdeIjror@sirena.org.uk>

On Wed, Nov 3, 2021 at 5:52 PM Mark Brown <broonie@kernel.org> wrote:
>
> On Wed, Nov 03, 2021 at 04:34:34PM -0400, Jim Quinlan wrote:
> > On Wed, Nov 3, 2021 at 4:25 PM Jim Quinlan <james.quinlan@broadcom.com> wrote:
>
> > > I did it to squelch the "supply xxxxx not found, using dummy
> > > regulator" output.  I'll change it.
>
> > Now I remember: if I know there are no vpciexxx-supplly props in the
> > DT, I can skip executing all of the buik regulator calls entirely, as
> > well as walking the PCI bus as in brcm_regulators_off().
>
> > Do you consider this a valid reason?
>
> No, the whole point in the core code providing dummy supplies is that it
> removes the complexity introduced by client drivers trying to guess if
> there's supplies available or not.  If they do that then we end up with
> a bunch of code duplication and issues if there's any changes or
> extensions to the generic bindings.
Ok, will change it.
Thanks, Jim