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net: phy: add an option to disable EEE advertisement

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This patch adds an option to disable EEE advertisement in the generic PHY
by providing a mask of prohibited modes corresponding to the value found in
the MDIO_AN_EEE_ADV register.

On some platforms, PHY Low power idle seems to be causing issues, even
breaking the link some cases. The patch provides a convenient way for these
platforms to disable EEE advertisement and work around the issue.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Tested-by: Yegor Yefremov <yegorslists@googlemail.com>
Tested-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
jbrunet
2016-11-28 10:46:46 +01:00
committed by David S. Miller
parent 436feafe95
commit d853d145ea
3 changed files with 77 additions and 9 deletions
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3
drivers/net/phy/phy.c
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@@ -1396,6 +1396,9 @@ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
{
int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
/* Mask prohibited EEE modes */
val &= ~phydev->eee_broken_modes;
phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
return 0;