diff options
| author | Jerome Brunet <jbrunet@baylibre.com> | 2018-01-03 16:46:29 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-17 09:29:30 +0100 |
| commit | 540eac0e594e216d7f85011286ee4bd234930ccc (patch) | |
| tree | 88df003fd36ccfcabd7654556d201e9b2d5bf5de /drivers | |
| parent | 7247c48a9a138ea0af35b05373135e60ab19e411 (diff) | |
| download | linux-stable-540eac0e594e216d7f85011286ee4bd234930ccc.tar.gz linux-stable-540eac0e594e216d7f85011286ee4bd234930ccc.tar.bz2 linux-stable-540eac0e594e216d7f85011286ee4bd234930ccc.zip | |
net: stmmac: enable EEE in MII, GMII or RGMII only
[ Upstream commit 879626e3a52630316d817cbda7cec9a5446d1d82 ]
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: 83bf79b6bb64 ("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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index c769da8d6f3a..103ae8ef8643 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -277,8 +277,14 @@ bool stmmac_eee_init(struct stmmac_priv *priv) { char *phy_bus_name = priv->plat->phy_bus_name; unsigned long flags; + int interface = priv->plat->interface; bool ret = false; + if ((interface != PHY_INTERFACE_MODE_MII) && + (interface != PHY_INTERFACE_MODE_GMII) && + !phy_interface_mode_is_rgmii(interface)) + goto out; + /* Using PCS we cannot dial with the phy registers at this stage * so we do not support extra feature like EEE. */ |