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| author | Philipp Zabel <p.zabel@pengutronix.de> | 2016-07-14 16:29:43 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-07-15 11:53:02 -0700 |
| commit | 77501a79cec40eac65c59ee7af3f786c703ead9c (patch) | |
| tree | fab4f2e3f889b732c7aaaa9c1d9cd72ca698d998 | |
| parent | 2f43b9beeac8e063353452b4bcf8712f6c2de27b (diff) | |
| download | linux-77501a79cec40eac65c59ee7af3f786c703ead9c.tar.bz2 | |
net: phy: micrel: Add KSZ8041FTL fiber mode support
We can't detect the FXEN (fiber mode) bootstrap pin, so configure
it via a boolean device tree property "micrel,fiber-mode".
If it is enabled, auto-negotiation is not supported.
The only available modes are 100base-fx (full duplex and half duplex).
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/devicetree/bindings/net/micrel.txt | 10 | ||||
| -rw-r--r-- | drivers/net/phy/micrel.c | 34 | ||||
| -rw-r--r-- | include/linux/micrel_phy.h | 1 |
3 files changed, 43 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt index 87496a8c64ab..8d157f0295a5 100644 --- a/Documentation/devicetree/bindings/net/micrel.txt +++ b/Documentation/devicetree/bindings/net/micrel.txt @@ -35,3 +35,13 @@ Optional properties: supported clocks: - KSZ8021, KSZ8031, KSZ8081, KSZ8091: "rmii-ref": The RMII reference input clock. Used to determine the XI input clock. + + - micrel,fiber-mode: If present the PHY is configured to operate in fiber mode + + Some PHYs, such as the KSZ8041FTL variant, support fiber mode, enabled + by the FXEN boot strapping pin. It can't be determined from the PHY + registers whether the PHY is in fiber mode, so this boolean device tree + property can be used to describe it. + + In fiber mode, auto-negotiation is disabled and the PHY can only work in + 100base-fx (full and half duplex) modes. diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index 5a8fefc25157..059f13b60fe0 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -311,6 +311,36 @@ static int kszphy_config_init(struct phy_device *phydev) return 0; } +static int ksz8041_config_init(struct phy_device *phydev) +{ + struct device_node *of_node = phydev->mdio.dev.of_node; + + /* Limit supported and advertised modes in fiber mode */ + if (of_property_read_bool(of_node, "micrel,fiber-mode")) { + phydev->dev_flags |= MICREL_PHY_FXEN; + phydev->supported &= SUPPORTED_FIBRE | + SUPPORTED_100baseT_Full | + SUPPORTED_100baseT_Half; + phydev->advertising &= ADVERTISED_FIBRE | + ADVERTISED_100baseT_Full | + ADVERTISED_100baseT_Half; + phydev->autoneg = AUTONEG_DISABLE; + } + + return kszphy_config_init(phydev); +} + +static int ksz8041_config_aneg(struct phy_device *phydev) +{ + /* Skip auto-negotiation in fiber mode */ + if (phydev->dev_flags & MICREL_PHY_FXEN) { + phydev->speed = SPEED_100; + return 0; + } + + return genphy_config_aneg(phydev); +} + static int ksz9021_load_values_from_of(struct phy_device *phydev, const struct device_node *of_node, u16 reg, @@ -788,8 +818,8 @@ static struct phy_driver ksphy_driver[] = { .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT, .driver_data = &ksz8041_type, .probe = kszphy_probe, - .config_init = kszphy_config_init, - .config_aneg = genphy_config_aneg, + .config_init = ksz8041_config_init, + .config_aneg = ksz8041_config_aneg, .read_status = genphy_read_status, .ack_interrupt = kszphy_ack_interrupt, .config_intr = kszphy_config_intr, diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h index 2e5b194b9b19..257173e0095e 100644 --- a/include/linux/micrel_phy.h +++ b/include/linux/micrel_phy.h @@ -37,6 +37,7 @@ /* struct phy_device dev_flags definitions */ #define MICREL_PHY_50MHZ_CLK 0x00000001 +#define MICREL_PHY_FXEN 0x00000002 #define MICREL_KSZ9021_EXTREG_CTRL 0xB #define MICREL_KSZ9021_EXTREG_DATA_WRITE 0xC |