diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-02-03 14:30:36 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-02-03 15:10:35 +0100 |
| commit | 62001548a6da1353064e2e889ec3eaa584893f6c (patch) | |
| tree | 1c07b4035c7cc5739e0484f409d791eba155e20f /drivers/net/dsa/mv88e6xxx | |
| parent | Merge branch 'dsa-mv88e6xxx-port-isolation' (diff) | |
| download | linux-62001548a6da1353064e2e889ec3eaa584893f6c.tar.xz linux-62001548a6da1353064e2e889ec3eaa584893f6c.zip | |
net: dsa: mv88e6xxx: add mv88e6352_g2_scratch_port_has_serdes()
Read the hardware configuration to determine which port is attached
to the serdes.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa/mv88e6xxx')
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/global2.h | 3 | ||||
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/global2_scratch.c | 28 |
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/global2.h b/drivers/net/dsa/mv88e6xxx/global2.h index f3e27573a386..807aeaad9830 100644 --- a/drivers/net/dsa/mv88e6xxx/global2.h +++ b/drivers/net/dsa/mv88e6xxx/global2.h @@ -299,6 +299,8 @@ #define MV88E6352_G2_SCRATCH_CONFIG_DATA1_NO_CPU BIT(2) #define MV88E6352_G2_SCRATCH_CONFIG_DATA2 0x72 #define MV88E6352_G2_SCRATCH_CONFIG_DATA2_P0_MODE_MASK 0x3 +#define MV88E6352_G2_SCRATCH_CONFIG_DATA3 0x73 +#define MV88E6352_G2_SCRATCH_CONFIG_DATA3_S_SEL BIT(1) #define MV88E6352_G2_SCRATCH_GPIO_PCTL_GPIO 0 #define MV88E6352_G2_SCRATCH_GPIO_PCTL_TRIG 1 @@ -370,6 +372,7 @@ extern const struct mv88e6xxx_gpio_ops mv88e6352_gpio_ops; int mv88e6xxx_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip, bool external); +int mv88e6352_g2_scratch_port_has_serdes(struct mv88e6xxx_chip *chip, int port); int mv88e6xxx_g2_atu_stats_set(struct mv88e6xxx_chip *chip, u16 kind, u16 bin); int mv88e6xxx_g2_atu_stats_get(struct mv88e6xxx_chip *chip, u16 *stats); diff --git a/drivers/net/dsa/mv88e6xxx/global2_scratch.c b/drivers/net/dsa/mv88e6xxx/global2_scratch.c index eda710062933..a9d6e40321a2 100644 --- a/drivers/net/dsa/mv88e6xxx/global2_scratch.c +++ b/drivers/net/dsa/mv88e6xxx/global2_scratch.c @@ -289,3 +289,31 @@ int mv88e6xxx_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip, return mv88e6xxx_g2_scratch_write(chip, misc_cfg, val); } + +/** + * mv88e6352_g2_scratch_port_has_serdes - indicate if a port can have a serdes + * @chip: chip private data + * @port: port number to check for serdes + * + * Indicates whether the port may have a serdes attached according to the + * pin strapping. Returns negative error number, 0 if the port is not + * configured to have a serdes, and 1 if the port is configured to have a + * serdes attached. + */ +int mv88e6352_g2_scratch_port_has_serdes(struct mv88e6xxx_chip *chip, int port) +{ + u8 config3, p; + int err; + + err = mv88e6xxx_g2_scratch_read(chip, MV88E6352_G2_SCRATCH_CONFIG_DATA3, + &config3); + if (err) + return err; + + if (config3 & MV88E6352_G2_SCRATCH_CONFIG_DATA3_S_SEL) + p = 5; + else + p = 4; + + return port == p; +} |