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author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2012-11-12 17:03:47 +0100 |
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committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2012-11-16 10:20:52 +0100 |
commit | fc8f5aded1cf9f5505c55694b36174621c7ac88c (patch) | |
tree | 9d27d420875319912d21537261bb1a45b8590223 /Documentation | |
parent | 77b67063bb6bce6d475e910d3b886a606d0d91f7 (diff) | |
download | op-kernel-dev-fc8f5aded1cf9f5505c55694b36174621c7ac88c.zip op-kernel-dev-fc8f5aded1cf9f5505c55694b36174621c7ac88c.tar.gz |
net: mvmdio: new Marvell MDIO driver
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>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/net/marvell-orion-mdio.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/marvell-orion-mdio.txt b/Documentation/devicetree/bindings/net/marvell-orion-mdio.txt new file mode 100644 index 0000000..34e7aaf --- /dev/null +++ b/Documentation/devicetree/bindings/net/marvell-orion-mdio.txt @@ -0,0 +1,35 @@ +* Marvell MDIO Ethernet Controller interface + +The Ethernet controllers of the Marvel Kirkwood, Dove, Orion5x, +MV78xx0, Armada 370 and Armada XP have an identical unit that provides +an interface with the MDIO bus. This driver handles this MDIO +interface. + +Required properties: +- compatible: "marvell,orion-mdio" +- reg: address and length of the SMI register + +The child nodes of the MDIO driver are the individual PHY devices +connected to this MDIO bus. They must have a "reg" property given the +PHY address on the MDIO bus. + +Example at the SoC level: + +mdio { + #address-cells = <1>; + #size-cells = <0>; + compatible = "marvell,orion-mdio"; + reg = <0xd0072004 0x4>; +}; + +And at the board level: + +mdio { + phy0: ethernet-phy@0 { + reg = <0>; + }; + + phy1: ethernet-phy@1 { + reg = <1>; + }; +} |