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net: dsa: bcm_sf2: disable RGMII interface(s) when link is down

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When the link is down, disable the RGMII interface to conserve as much
power as possible. We re-enable the RGMII interface whenever the link is
detected.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2014-09-24 17:05:19 -07:00 committed by David S. Miller
parent b2f2af21e3
commit 7de1557ce7
1 changed files with 9 additions and 0 deletions
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9
drivers/net/dsa/bcm_sf2.c
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@ -506,6 +506,15 @@ static void bcm_sf2_sw_adjust_link(struct dsa_switch *ds, int port,
port_mode = EXT_REVMII;
break;
default:
/* All other PHYs: internal and MoCA */
goto force_link;
}
/* If the link is down, just disable the interface to conserve power */
if (!phydev->link) {
reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
reg &= ~RGMII_MODE_EN;
reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
goto force_link;
}