From: Andrew Lunn <andrew@lunn•ch>
To: Grant Edwards <grant.b.edwards@gmail•com>
Cc: Florian Fainelli <f.fainelli@gmail•com>, netdev@vger•kernel.org
Subject: Re: net: macb: fail when there's no PHY
Date: Wed, 2 Dec 2020 19:35:31 +0100 [thread overview]
Message-ID: <20201202183531.GJ2324545@lunn.ch> (raw)
In-Reply-To: <X8fb4zGoxcS6gFsc@grante>
> When using the SIOC[SG]MIIREG ioctl() call, how does one control
> whether the fake fixed-link bus is accessed or the real macb-mdio bus
> is accessed?
As far as i remember, that ioctl is based on the interface name. So it
will access the MDIO bus of the PHY that is attached to the MAC.
I guess you have user space drivers using the IOCTL to access devices
on the real bus? A switch? Can you swap to a DSA driver?
> How does the macb driver decide which bus/id combination to use as
> "the phy" that controls the link duplex/speed settting the the MAC?
phy-handle points to a PHY.
Andrew
next prev parent reply other threads:[~2020-12-02 18:36 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-21 19:59 net: macb: fail when there's no PHY Grant Edwards
2017-09-21 20:05 ` Florian Fainelli
2017-09-21 20:36 ` Grant Edwards
2017-09-21 21:35 ` Brandon Streiff
2017-09-29 7:05 ` Harini Katakam
[not found] ` <CAK=1mW6Gti0QpUjirB6PfMCiQvnDjkbb56pVKkQmpCSkRU6wtA@mail.gmail.com>
2020-12-02 18:10 ` Florian Fainelli
2020-12-02 18:24 ` Grant Edwards
2020-12-02 18:35 ` Andrew Lunn [this message]
2020-12-02 19:16 ` Grant Edwards
2020-12-02 21:11 ` Andrew Lunn
2020-12-02 21:23 ` Grant Edwards
2020-12-03 2:39 ` Andrew Lunn
2020-12-03 3:03 ` Grant Edwards
2020-12-03 3:42 ` Florian Fainelli
2020-12-03 3:54 ` Grant Edwards
2020-12-03 4:07 ` Andrew Lunn
2020-12-03 15:07 ` Grant Edwards
2020-12-03 21:17 ` Andrew Lunn
2020-12-03 21:39 ` Grant Edwards
2020-12-03 21:49 ` Andrew Lunn
2020-12-03 22:20 ` Grant Edwards
2020-12-04 8:28 ` Alexander Dahl
2020-12-04 17:36 ` Andrew Lunn
2020-12-04 16:47 ` Florian Fainelli
2020-12-05 2:52 ` Grant Edwards
2020-12-05 3:06 ` Florian Fainelli
2020-12-03 4:00 ` Andrew Lunn
2020-12-02 18:10 ` Grant Edwards
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