tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
authored by
Philipp Zabel
and committed by
David S. Miller
77501a79
2f43b9be
+43
-2
+10
Documentation/devicetree/bindings/net/micrel.txt
+10
Documentation/devicetree/bindings/net/micrel.txt
···
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supported clocks:
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- KSZ8021, KSZ8031, KSZ8081, KSZ8091: "rmii-ref": The RMII reference
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input clock. Used to determine the XI input clock.
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+
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- micrel,fiber-mode: If present the PHY is configured to operate in fiber mode
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+
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Some PHYs, such as the KSZ8041FTL variant, support fiber mode, enabled
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by the FXEN boot strapping pin. It can't be determined from the PHY
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registers whether the PHY is in fiber mode, so this boolean device tree
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property can be used to describe it.
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In fiber mode, auto-negotiation is disabled and the PHY can only work in
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100base-fx (full and half duplex) modes.
+32
-2
drivers/net/phy/micrel.c
+32
-2
drivers/net/phy/micrel.c
···
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return 0;
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}
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+
static int ksz8041_config_init(struct phy_device *phydev)
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{
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struct device_node *of_node = phydev->mdio.dev.of_node;
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/* Limit supported and advertised modes in fiber mode */
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if (of_property_read_bool(of_node, "micrel,fiber-mode")) {
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phydev->dev_flags |= MICREL_PHY_FXEN;
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phydev->supported &= SUPPORTED_FIBRE |
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SUPPORTED_100baseT_Full |
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SUPPORTED_100baseT_Half;
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phydev->advertising &= ADVERTISED_FIBRE |
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ADVERTISED_100baseT_Full |
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ADVERTISED_100baseT_Half;
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phydev->autoneg = AUTONEG_DISABLE;
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}
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return kszphy_config_init(phydev);
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}
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+
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static int ksz8041_config_aneg(struct phy_device *phydev)
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{
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/* Skip auto-negotiation in fiber mode */
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if (phydev->dev_flags & MICREL_PHY_FXEN) {
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phydev->speed = SPEED_100;
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return 0;
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}
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return genphy_config_aneg(phydev);
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}
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+
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static int ksz9021_load_values_from_of(struct phy_device *phydev,
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const struct device_node *of_node,
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u16 reg,
···
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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.driver_data = &ksz8041_type,
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.probe = kszphy_probe,
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-
.config_init = kszphy_config_init,
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-
.config_aneg = genphy_config_aneg,
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+
.config_init = ksz8041_config_init,
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.config_aneg = ksz8041_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = kszphy_ack_interrupt,
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.config_intr = kszphy_config_intr,