Messages in this thread | | | Date | Wed, 31 Mar 2021 19:35:24 +0100 | From | Russell King - ARM Linux admin <> | Subject | Re: [PATCH 2/2] net: mdio: support c45 peripherals on c22 busses |
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On Wed, Mar 31, 2021 at 07:58:33PM +0200, danilokrummrich@dk-develop.de wrote: > For this cited change the only thing happening is that if get_phy_device() > already failed for probing with is_c45==false (C22 devices) it tries to > probe with is_c45==true (C45 devices) which then either results into actual > C45 frame transfers or indirect accesses by calling mdiobus_c45_*() functions.
Please explain why and how a PHY may not appear to be present using C22 frames to read the ID registers, but does appear to be present when using C22 frames to the C45 indirect registers - and summarise which PHYs have this behaviour.
It seems very odd that any PHY would only implement C45 indirect registers in the C22 register space.
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