[PATCH v16 1/6] phy: core: add notifier infrastructure

[Manivannan Sadhasivam]

On Thu, Sep 24, 2026 at 07:25:37PM +0200, Sebastian Reichel wrote:
> Some PHY devices with multiple ports (e.g. USB3 and DP) require a reset
> if the configuration changes or cable orientation changes. This is a
> problem, as the consumer device will run into undefined behavior.
> 
> With the new PHY notifier API introduced in this patch, the consumer
> driver can hook into reset events coming from a PHY device to handle the
> PHY going down gracefully.
> 
> Note that this uses -ENOSYS instead of the more sensible -ENOTSUP for
> the stub functions when GENERIC_PHY is disabled to stay consistent with
> the existing ones.
> 
> Tested-by: Igor Paunovic <royalnet026 at gmail.com> # Orange Pi 5 Plus
> Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at oss.qualcomm.com>

- Mani

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