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net: dsa: mv88e6xxx: Cache the port cmode

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The ports CMODE indicates the type of link between the MAC and the
PHY. It is used often in the SERDES code. Rather than read it each
time, cache its value.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn
2018-08-09 15:38:45 +02:00
committed by David S. Miller
parent f8236a0835
commit 2d2e1dd299
5 changed files with 57 additions and 47 deletions
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16
drivers/net/dsa/mv88e6xxx/port.c
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@@ -385,11 +385,12 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
return err;
}
chip->ports[port].cmode = cmode;
return 0;
}
/* mv88e6185 only has 3 bits for CMODE */
static int mv88e6185_port_get_cmode(struct mv88e6xxx_chip *chip, int port)
int mv88e6185_port_get_cmode(struct mv88e6xxx_chip *chip, int port, u8 *cmode)
{
int err;
u16 reg;
@@ -398,10 +399,12 @@ static int mv88e6185_port_get_cmode(struct mv88e6xxx_chip *chip, int port)
if (err)
return err;
return reg & MV88E6185_PORT_STS_CMODE_MASK;
*cmode = reg & MV88E6185_PORT_STS_CMODE_MASK;
return 0;
}
int mv88e6xxx_port_get_cmode(struct mv88e6xxx_chip *chip, int port, u8 *cmode)
int mv88e6352_port_get_cmode(struct mv88e6xxx_chip *chip, int port, u8 *cmode)
{
int err;
u16 reg;
@@ -457,10 +460,7 @@ int mv88e6185_port_link_state(struct mv88e6xxx_chip *chip, int port,
struct phylink_link_state *state)
{
if (state->interface == PHY_INTERFACE_MODE_1000BASEX) {
int cmode = mv88e6185_port_get_cmode(chip, port);
if (cmode < 0)
return cmode;
u8 cmode = chip->ports[port].cmode;
/* When a port is in "Cross-chip serdes" mode, it uses
* 1000Base-X full duplex mode, but there is no automatic