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This patch adds a separate driver for the MDIO interface of the
Marvell Ethernet controllers. There are two reasons to have a separate
driver rather than including it inside the MAC driver itself:
*) The MDIO interface is shared by all Ethernet ports, so a driver
must guarantee non-concurrent accesses to this MDIO interface. The
most logical way is to have a separate driver that handles this
single MDIO interface, used by all Ethernet ports.
*) The MDIO interface is the same between the existing mv643xx_eth
driver and the new mvneta driver. Even though it is for now only
used by the mvneta driver, it will in the future be used by the
mv643xx_eth driver as well.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: David S. Miller <davem@davemloft.net>
36 lines
783 B
Plaintext
36 lines
783 B
Plaintext
* Marvell MDIO Ethernet Controller interface
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The Ethernet controllers of the Marvel Kirkwood, Dove, Orion5x,
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MV78xx0, Armada 370 and Armada XP have an identical unit that provides
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an interface with the MDIO bus. This driver handles this MDIO
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interface.
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Required properties:
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- compatible: "marvell,orion-mdio"
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- reg: address and length of the SMI register
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The child nodes of the MDIO driver are the individual PHY devices
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connected to this MDIO bus. They must have a "reg" property given the
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PHY address on the MDIO bus.
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Example at the SoC level:
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mdio {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "marvell,orion-mdio";
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reg = <0xd0072004 0x4>;
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};
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And at the board level:
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mdio {
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phy0: ethernet-phy@0 {
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reg = <0>;
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};
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phy1: ethernet-phy@1 {
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reg = <1>;
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};
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}
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