On Mon, Feb 21, 2022 at 01:45:57PM +0200, Baruch Siach wrote:
> From: Baruch Siach <baruch.siach@xxxxxxxxx>
>
> Experimentation shows that PHY detect might fail when the code attempts
> MDIO bus read immediately after clock enable. Add delay to stabilize the
> clock before bus access.
>
> PHY detect failure started to show after commit 7590fc6f80ac ("net:
> mdio: Demote probed message to debug print") that removed coincidental
> delay between clock enable and bus access.
>
> 10ms is meant to match the time it take to send the probed message over
> UART at 115200 bps. This might be a far overshoot.
>
> Fixes: 23a890d493e3 ("net: mdio: Add the reset function for IPQ MDIO driver")
> Signed-off-by: Baruch Siach <baruch.siach@xxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Andrew
