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net: dsa: bcm_sf2: use 2 Gbps IMP port link on BCM4908

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BCM4908 uses 2 Gbps link between switch and the Ethernet interface.
Without this BCM4908 devices were able to achieve only 2 x ~895 Mb/s.
This allows handling e.g. NAT traffic with 940 Mb/s.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rafał Miłecki 2021-03-10 13:51:59 +01:00 committed by David S. Miller
parent 0571a753cb
commit 8373a0fe9c
1 changed files with 4 additions and 1 deletions
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5
drivers/net/dsa/bcm_sf2.c
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@ -114,7 +114,10 @@ static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
/* Force link status for IMP port */
reg = core_readl(priv, offset);
reg |= (MII_SW_OR | LINK_STS);
reg &= ~GMII_SPEED_UP_2G;
if (priv->type == BCM4908_DEVICE_ID)
reg |= GMII_SPEED_UP_2G;
else
reg &= ~GMII_SPEED_UP_2G;
core_writel(priv, reg, offset);
/* Enable Broadcast, Multicast, Unicast forwarding to IMP port */