net: phy: broadcom: stub c45 read/write for 54810

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[ Upstream commit 096516d092 ]

The 54810 does not support c45. The mmd_phy_indirect accesses return
arbirtary values leading to odd behavior like saying it supports EEE
when it doesn't. We also see that reading/writing these non-existent
MMD registers leads to phy instability in some cases.

Fixes: b14995ac25 ("net: phy: broadcom: Add BCM54810 PHY entry")
Signed-off-by: Justin Chen <justin.chen@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/1691901708-28650-1-git-send-email-justin.chen@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Justin Chen 2023-08-12 21:41:47 -07:00 • committed by Greg Kroah-Hartman

parent bf221e5e4b

commit 0ffbc341cf

1 changed files with 13 additions and 0 deletions

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drivers/net/phy/broadcom.c

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