net: stmmac: enable EEE in MII, GMII or RGMII only

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[ Upstream commit 879626e3a5 ]

Note in the databook - Section 4.4 - EEE :
" The EEE feature is not supported when the MAC is configured to use the
TBI, RTBI, SMII, RMII or SGMII single PHY interface. Even if the MAC
supports multiple PHY interfaces, you should activate the EEE mode only
when the MAC is operating with GMII, MII, or RGMII interface."

Applying this restriction solves a stability issue observed on Amlogic
gxl platforms operating with RMII interface and the internal PHY.

Fixes: 83bf79b6bb ("stmmac: disable at run-time the EEE if not supported")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Tested-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Jerome Brunet 2018-01-03 16:46:29 +01:00 • committed by Greg Kroah-Hartman

parent 47b5886f73

commit db21b74346

1 changed files with 6 additions and 0 deletions

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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

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