From: Florian Fainelli <f.fainelli@gmail.com>
To: Stefan Wahren <stefan.wahren@i2se.com>,
Maxime Ripard <maxime@cerno.tech>,
Doug Berger <opendmb@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>
Cc: netdev@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com,
Nicolas Saenz Julienne <nsaenz@kernel.org>
Subject: Re: GENET and UNIMAC MDIO probe issue?
Date: Fri, 22 Oct 2021 09:27:49 -0700 [thread overview]
Message-ID: <4e230c8c-790a-2a87-ec72-c1d6e166719e@gmail.com> (raw)
In-Reply-To: <150dcf36-959c-36e3-3b35-74b7ec1db774@i2se.com>
On 10/22/21 8:35 AM, Stefan Wahren wrote:
> Hi Maxime,
>
> Am 22.10.21 um 16:33 schrieb Maxime Ripard:
>> Hi Florian, Doug,
>>
>> I'm currently trying to make the RaspberryPi CM4 IO board probe its
>> ethernet controller, and it looks like genet doesn't manage to find its
>> PHY and errors out with:
>>
>> [ 3.240435] libphy: Fixed MDIO Bus: probed
>> [ 3.248849] bcmgenet fd580000.ethernet: GENET 5.0 EPHY: 0x0000
>> [ 3.259118] libphy: bcmgenet MII bus: probed
>> [ 3.278420] mdio_bus unimac-mdio--19: MDIO device at address 1 is missing.
>> [ 3.285661] unimac-mdio unimac-mdio.-19: Broadcom UniMAC MDIO bus
>>
>> ....
>>
>> [ 13.082281] could not attach to PHY
>> [ 13.089762] bcmgenet fd580000.ethernet eth0: failed to connect to PHY
>> [ 74.739621] could not attach to PHY
>> [ 74.746492] bcmgenet fd580000.ethernet eth0: failed to connect to PHY
>>
>> Here's the full boot log:
>> https://pastebin.com/8RhuezSn
>
> looks like you are using the vendor DTB, please use the upstream DTB
> from linux-next:
>
> bcm2711-rpi-cm4-io.dtb
Stefan beat me to it, but yes, it looked like you had an Ethernet PHY at
MDIO address 25, when arch/arm/boot/dts/bcm2711-rpi-cm4.dtsi indicates
that it should be at address 0, therefore it won't work.
The issue with mdio-bcm-unimac not being loaded would only be applicable
in a modular case anyway, when it is built-in, there would be no such
problem. Let me know if there are other changes that are necessary, DTS
or else.
--
Florian
prev parent reply other threads:[~2021-10-22 16:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-22 14:33 GENET and UNIMAC MDIO probe issue? Maxime Ripard
2021-10-22 15:35 ` Stefan Wahren
2021-10-22 15:58 ` Maxime Ripard
2021-10-26 4:03 ` Cyril Brulebois
2021-10-22 16:27 ` Florian Fainelli [this message]
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