Messages in this thread | | | From | Wong Vee Khee <> | Subject | [RFC net-next 0/2] Introduce MDIO probe order C45 over C22 | Date | Tue, 25 May 2021 13:58:03 +0800 |
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Synopsys MAC controller is capable of pairing with external PHY devices that accessible via Clause-22 and Clause-45.
There is a problem when it is paired with Marvell 88E2110 which returns PHY ID of 0 using get_phy_c22_id(). We can add this check in that function, but this will break swphy, as swphy_reg_reg() return 0. [1]
Hence, we introduce MDIOBUS_CAP_C45_C22 which allow us to probe using Clause-45, if it fails, we then proceed to try with Clause-22.
[1]: https://lkml.org/lkml/2021/3/18/584
Wong Vee Khee (2): net: phy: allow mdio bus to probe for c45 devices before c22 net: stmmac: allow gmac4 to probe for c45 devices before c22
drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 2 +- include/linux/phy.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-)
-- 2.25.1
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