From e7e72ac05acc357065a9448314dd14fff7c40d39 Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Mon, 31 Aug 2015 15:56:51 +0200 Subject: [PATCH] dsa: mv88e6xxx: Set the RGMII delay based on phy interface Some Marvell switches allow the RGMII Rx and Tx clock to be delayed when the port is using RGMII. Have the adjust_link function look at the phy interface type and enable this delay as requested. Signed-off-by: Andrew Lunn Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx.c | 10 ++++++++++ drivers/net/dsa/mv88e6xxx.h | 2 ++ 2 files changed, 12 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 1a8c45f3e680..90dee97ae793 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -612,6 +612,16 @@ void mv88e6xxx_adjust_link(struct dsa_switch *ds, int port, if (phydev->duplex == DUPLEX_FULL) reg |= PORT_PCS_CTRL_DUPLEX_FULL; + if ((mv88e6xxx_6352_family(ds) || mv88e6xxx_6351_family(ds)) && + (port >= ps->num_ports - 2)) { + if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) + reg |= PORT_PCS_CTRL_RGMII_DELAY_RXCLK; + if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) + reg |= PORT_PCS_CTRL_RGMII_DELAY_TXCLK; + if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) + reg |= (PORT_PCS_CTRL_RGMII_DELAY_RXCLK | + PORT_PCS_CTRL_RGMII_DELAY_TXCLK); + } _mv88e6xxx_reg_write(ds, REG_PORT(port), PORT_PCS_CTRL, reg); out: diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h index 79003c55fe62..9b6f3d9d5ae1 100644 --- a/drivers/net/dsa/mv88e6xxx.h +++ b/drivers/net/dsa/mv88e6xxx.h @@ -46,6 +46,8 @@ #define PORT_STATUS_TX_PAUSED BIT(5) #define PORT_STATUS_FLOW_CTRL BIT(4) #define PORT_PCS_CTRL 0x01 +#define PORT_PCS_CTRL_RGMII_DELAY_RXCLK BIT(15) +#define PORT_PCS_CTRL_RGMII_DELAY_TXCLK BIT(14) #define PORT_PCS_CTRL_FC BIT(7) #define PORT_PCS_CTRL_FORCE_FC BIT(6) #define PORT_PCS_CTRL_LINK_UP BIT(5) -- 2.34.1