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6c89533dee
Update the Marvell Armada 38x COMPHY binding with an additional optional register pair describing the location of an undocumented system register controlling something to do with the Gigabit Ethernet and COMPHY. There is one bit for each COMPHY lane that may be using the serdes, but exactly what this register does is completely unknown. This register only appears to exist on Armada 38x devices, and not other SoCs using the NETA ethernet block, so it seems logical that it should be part of the COMPHY. This is also how u-boot groups this register; it is dealt with as part of the COMPHY initialisation there. However, at the end of the day, due to the undocumented nature of this register, we can only guess. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Acked-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/E1jxtRZ-0003Ta-4h@rmk-PC.armlinux.org.uk Signed-off-by: Vinod Koul <vkoul@kernel.org>
48 lines
1.2 KiB
Text
48 lines
1.2 KiB
Text
mvebu armada 38x comphy driver
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------------------------------
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This comphy controller can be found on Marvell Armada 38x. It provides a
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number of shared PHYs used by various interfaces (network, sata, usb,
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PCIe...).
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Required properties:
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- compatible: should be "marvell,armada-380-comphy"
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- reg: should contain the comphy register location and length.
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- #address-cells: should be 1.
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- #size-cells: should be 0.
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Optional properties:
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- reg-names: must be "comphy" as the first name, and "conf".
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- reg: must contain the comphy register location and length as the first
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pair, followed by an optional configuration register address and
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length pair.
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A sub-node is required for each comphy lane provided by the comphy.
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Required properties (child nodes):
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- reg: comphy lane number.
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- #phy-cells : from the generic phy bindings, must be 1. Defines the
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input port to use for a given comphy lane.
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Example:
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comphy: phy@18300 {
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compatible = "marvell,armada-380-comphy";
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reg-names = "comphy", "conf";
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reg = <0x18300 0x100>, <0x18460 4>;
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#address-cells = <1>;
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#size-cells = <0>;
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cpm_comphy0: phy@0 {
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reg = <0>;
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#phy-cells = <1>;
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};
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cpm_comphy1: phy@1 {
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reg = <1>;
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#phy-cells = <1>;
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};
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};
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