From 7de1557ce7521e756974d5c28794c2375d28e3cc Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 24 Sep 2014 17:05:19 -0700 Subject: [PATCH] net: dsa: bcm_sf2: disable RGMII interface(s) when link is down 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 Signed-off-by: David S. Miller --- drivers/net/dsa/bcm_sf2.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index d9b7da545063..58b8fef25b96 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -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; } -- 2.34.1