From: Andrew Lunn <andrew@lunn.ch>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: netdev@vger.kernel.org, adam.rudzinski@arf.net.pl,
m.felsch@pengutronix.de, hkallweit1@gmail.com,
richard.leitner@skidata.com, zhengdejin5@gmail.com,
devicetree@vger.kernel.org, kernel@pengutronix.de,
kuba@kernel.org, robh+dt@kernel.org
Subject: Re: [PATCH net-next 0/3] net: phy: Support enabling clocks prior to bus probe
Date: Fri, 4 Sep 2020 15:58:53 +0200 [thread overview]
Message-ID: <20200904135853.GN3112546@lunn.ch> (raw)
In-Reply-To: <cc6fc0f6-d4ae-9fa1-052d-6ab8e00ab32f@gmail.com>
On Thu, Sep 03, 2020 at 09:04:11PM -0700, Florian Fainelli wrote:
>
>
> On 9/2/2020 9:39 PM, Florian Fainelli wrote:
> > Hi all,
> >
> > This patch series takes care of enabling the Ethernet PHY clocks in
> > DT-based systems (we have no way to do it for ACPI, and ACPI would
> > likely keep all of this hardware enabled anyway).
> >
> > Please test on your respective platforms, mine still seems to have
> > a race condition that I am tracking down as it looks like we are not
> > waiting long enough post clock enable.
> >
> > The check on the clock reference count is necessary to avoid an
> > artificial bump of the clock reference count and to support the unbind
> > -> bind of the PHY driver. We could solve it in different ways.
> >
> > Comments and test results welcome!
>
> Andrew, while we figure out a proper way to support this with the Linux
> device driver model, would you be opposed in a single patch to
> drivers/net/mdio/mdio-bcm-unimac.c which takes care of enabling the PHY's
> clock during bus->reset just for the sake of getting those systems to work,
> and later on we move over to the pre-probe mechanism?
>
> That would allow me to continue working with upstream kernels on these
> systems without carrying a big pile of patches.
We do have quite a need for the proper solution. I wouldn't want you
dropping the proper solution because you have a hack in place.
Please add a comment: "HORRIBLE TEMPORARY HACK", to give you
motivation to remove it again :-)
Andrew
prev parent reply other threads:[~2020-09-04 13:59 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 4:39 [PATCH net-next 0/3] net: phy: Support enabling clocks prior to bus probe Florian Fainelli
2020-09-03 4:39 ` [PATCH net-next 1/3] " Florian Fainelli
2020-09-03 20:39 ` Andrew Lunn
2020-09-03 21:25 ` Andrew Lunn
2020-09-03 21:28 ` Rob Herring
2020-09-03 21:42 ` Andrew Lunn
2020-09-03 21:50 ` Florian Fainelli
2020-09-03 21:43 ` Florian Fainelli
2020-09-03 4:39 ` [PATCH net-next 2/3] net: phy: mdio-bcm-unimac: Enable GPHY resources during bus reset Florian Fainelli
2020-09-03 4:39 ` [PATCH net-next 3/3] net: phy: bcm7xxx: request and manage GPHY clock Florian Fainelli
2020-09-04 6:15 ` Marco Felsch
2020-09-04 15:37 ` Florian Fainelli
2020-09-07 7:34 ` Marco Felsch
2020-09-07 19:07 ` Marco Felsch
2020-09-04 6:18 ` Marco Felsch
2020-09-04 15:38 ` Florian Fainelli
2020-09-07 7:37 ` Marco Felsch
2020-09-04 4:04 ` [PATCH net-next 0/3] net: phy: Support enabling clocks prior to bus probe Florian Fainelli
2020-09-04 6:19 ` Adam Rudziński
2020-09-04 13:45 ` Andrew Lunn
2020-09-04 14:00 ` Adam Rudziński
2020-09-04 14:23 ` Andrew Lunn
2020-09-04 17:21 ` Adam Rudziński
2020-09-04 13:58 ` Andrew Lunn [this message]
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