linux-kernel - Re: [PATCH v4 1/3] regulator: Add of_regulator_bulk_get

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Message-ID: <Y3N6Qhf+RLNrr/nW@shell.armlinux.org.uk>
Date:   Tue, 15 Nov 2022 11:38:42 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Mark Brown <broonie@...nel.org>
Cc:     Corentin LABBE <clabbe@...libre.com>, andrew@...n.ch,
        calvin.johnson@....nxp.com, davem@...emloft.net,
        edumazet@...gle.com, hkallweit1@...il.com,
        jernej.skrabec@...il.com, krzysztof.kozlowski+dt@...aro.org,
        kuba@...nel.org, lgirdwood@...il.com, pabeni@...hat.com,
        robh+dt@...nel.org, samuel@...lland.org, wens@...e.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...ts.linux.dev,
        netdev@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v4 1/3] regulator: Add of_regulator_bulk_get_all

On Tue, Nov 15, 2022 at 11:16:53AM +0000, Mark Brown wrote:
> On Tue, Nov 15, 2022 at 10:42:50AM +0000, Russell King (Oracle) wrote:
> > On Tue, Nov 15, 2022 at 10:34:41AM +0000, Mark Brown wrote:
> 
> > > Well, it's not making this maintainer happy :/  If we know what
> > > PHY is there why not just look up the set of supplies based on
> > > the compatible of the PHY?
> 
> > It looks to me like this series fetches the regulators before the PHY
> > is bound to the driver, so what you're proposing would mean that the
> > core PHY code would need a table of all compatibles (which is pretty
> > hard to do, they encode the vendor/device ID, not some descriptive
> > name) and then a list of the regulator names. IMHO that doesn't scale.
> 
> Oh, PHYs have interesting enough drivers to dynamically load
> here? The last time I was looking at MDIO stuff it was all
> running from generic class devices but that was quite a while
> ago.

There's a couple of generic drivers which are used if there isn't a
specific driver available for the vendor/device ID that has either
been probed from the hardware, or discovered encoded in the firmware's
compatible property.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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