On Tue, Sep 28, 2021 at 5:30 AM Greg Kroah-Hartman
[off-list ref] wrote:

On Mon, Sep 27, 2021 at 06:13:12PM -0700, Saravana Kannan wrote:

quoted

On Mon, Sep 27, 2021 at 5:56 PM Dmitry Baryshkov

quoted

root@qcom-armv8a:~# ls -l /sys/bus/platform/devices/88e9000.phy/
lrwxrwxrwx    1 root     root             0 Aug  4 15:13
consumer:platform:a600000.usb ->
../../../virtual/devlink/platform:88e9000.phy--platform:a600000.usb
lrwxrwxrwx    1 root     root             0 Aug  4 15:13
consumer:platform:af00000.clock-controller ->
../../../virtual/devlink/platform:88e9000.phy--platform:af00000.clock-controller
-rw-r--r--    1 root     root          4096 Aug  4 15:13 driver_override
-r--r--r--    1 root     root          4096 Aug  4 15:13 modalias
lrwxrwxrwx    1 root     root             0 Aug  4 15:13 of_node ->
../../../../firmware/devicetree/base/soc@0/phy@88e9000
drwxr-xr-x    2 root     root             0 Aug  4 15:13 power
lrwxrwxrwx    1 root     root             0 Aug  4 15:10 subsystem ->
../../../../bus/platform
lrwxrwxrwx    1 root     root             0 Aug  4 15:13
supplier:platform:100000.clock-controller ->
../../../virtual/devlink/platform:100000.clock-controller--platform:88e9000.phy
lrwxrwxrwx    1 root     root             0 Aug  4 15:13
supplier:platform:18200000.rsc:clock-controller ->
../../../virtual/devlink/platform:18200000.rsc:clock-controller--platform:88e9000.phy
lrwxrwxrwx    1 root     root             0 Aug  4 15:13
supplier:platform:18200000.rsc:pm8150-rpmh-regulators ->
../../../virtual/devlink/platform:18200000.rsc:pm8150-rpmh-regulators--platform:88e9000.phy
-rw-r--r--    1 root     root          4096 Aug  4 15:10 uevent
-r--r--r--    1 root     root          4096 Aug  4 15:13
waiting_for_supplier

Thus it is not possible to spot this device link without
CONFIG_DEBUG_DRIVER=y (or any similar debugging technique).

I sent out some patches to make this easier. But doesn't look like
it'll land in 5.15.
https://lore.kernel.org/lkml/20210915172808.620546-1-saravanak@google.com/ (local)

I have now queued these up to make it into 5.15-final, this thread has
convinced me :)

Thanks :)

-Saravana