Re: [PATCH] usb: dwc3: qcom: Add support to skip phy management by USB core

[Val Packett <val@packett.cool>]

On 7/23/26 7:54 AM, Krishna Kurapati wrote:
> DWC3 driver does manage phys itself sufficiently for Qualcomm platforms.
> If xhci-skip-phy-init is not set, the HCD core does a phy_init and phy_
> exit is done only when roothub is being destroyed. Due to this, during
> system suspend in host mode, although phy_exit is done by DWC3 core, the
> init_count on phy is never down to zero since HCD core also did an init.
> consequently causing phy's exit routine to not be called. Hence, add
> support to skip phy management by USB core.
>
> Some Exynos platforms still do rely on USB core for phy_calibrate calls,
> hence disable USB core management for Qualcomm platforms only.
>
> Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
> ---
> Link to PHY calibrate handling for Exynos platforms:
> https://lore.kernel.org/all/20190829053028.32438-1-m.szyprowski@samsung.com/

Hi,

this was merged into -next a few days ago, and I'm seeing warnings on 
boot now:

[    0.613188] sysfs: cannot create duplicate filename 
'/devices/platform/soc@0/a800000.usb/software_node'
[    0.613195] CPU: 10 UID: 0 PID: 93 Comm: kworker/u49:0 Tainted: G    
     W           7.3.0-rc2-next-20260907-uwu+ #143 PREEMPT(full)
[    0.613197] Tainted: [W]=WARN
[    0.613198] Hardware name: Dell Inc. Latitude 7455/0FK7MX, BIOS 
2.13.0 09/19/2025
[    0.613199] Workqueue: events_unbound deferred_probe_work_func
[    0.613206] Call trace:
[..]
[    0.613226]  device_create_managed_software_node+0xe8/0x108
[    0.613227]  dwc3_qcom_probe+0x5a4/0x7b0

There is indeed already a software node being created in the shared dwc3 
core code.

Could there be any other consequences than a duplicate sysfs path?

Maybe the property should instead be added to all qcom device trees?

Thanks,
~val