linux-kernel - Re: [PATCH v4 01/29] Revert "treewide: Fix probing of devices in DT overlays"

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Message-ID: <20251127082456.08542b8c@bootlin.com>
Date: Thu, 27 Nov 2025 08:24:56 +0100
From: Herve Codina <herve.codina@...tlin.com>
To: Rob Herring <robh@...nel.org>
Cc: Matti Vaittinen <mazziesaccount@...il.com>, Kalle Niemi
 <kaleposti@...il.com>, Andrew Lunn <andrew@...n.ch>, Krzysztof Kozlowski
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Subject: Re: [PATCH v4 01/29] Revert "treewide: Fix probing of devices in DT
 overlays"

Hi Matti, Rob,

...

> 
> Seems to be fw_devlink related. I suppose if you turn it off it works?
> There's info about the dependencies in sysfs or maybe debugfs. I don't
> remember the details, but that should help to tell you why things
> aren't probing.

All available links are available the /sys/class/devlink/ directory [1].
You can check them to see if each each provider/consumer are correct.

Also, for each device you can find suppliers [2] the device depends on and
consumers of the device in its device directory [3].
for instance in /sys/bus/platform/devices/foo/ for the foo device.

[1] https://elixir.bootlin.com/linux/v6.18-rc7/source/Documentation/ABI/testing/sysfs-class-devlink
[2] https://elixir.bootlin.com/linux/v6.18-rc7/source/Documentation/ABI/testing/sysfs-devices-supplier
[3] https://elixir.bootlin.com/linux/v6.18-rc7/source/Documentation/ABI/testing/sysfs-devices-consumer

> 
> I've dropped the changes for 6.18 for now. No one really seems to be
> in need of them yet AFAICT.

Best regards,
Hervé