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Thanks to work done by Broadcom explaining their USB 3.0 PHY details we know it's attached to the MDIO bus. Use this knowledge to update the binding: make it a subnode to the MDIO bus and rework way of specifying required registers. This will describe hardware more precisely and will allow to support (describe) more devices attached to the MDIO. While compatibility strings remain the same there isn't a direct conflict (compatibility breakage) for the binding. Originally it wasn't supposed to be used for MDIO subnode so this change should be safe unless some operating system was probing MDIO subnodes as standalone devices. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
35 lines
794 B
Plaintext
35 lines
794 B
Plaintext
Driver for Broadcom Northstar USB 3.0 PHY
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Required properties:
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- compatible: one of: "brcm,ns-ax-usb3-phy", "brcm,ns-bx-usb3-phy".
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- reg: address of MDIO bus device
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- usb3-dmp-syscon: phandle to syscon with DMP (Device Management Plugin)
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registers
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- #phy-cells: must be 0
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Initialization of USB 3.0 PHY depends on Northstar version. There are currently
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three known series: Ax, Bx and Cx.
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Known A0: BCM4707 rev 0
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Known B0: BCM4707 rev 4, BCM53573 rev 2
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Known B1: BCM4707 rev 6
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Known C0: BCM47094 rev 0
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Example:
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mdio: mdio@0 {
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reg = <0x0>;
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#size-cells = <1>;
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#address-cells = <0>;
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usb3-phy@10 {
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compatible = "brcm,ns-ax-usb3-phy";
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reg = <0x10>;
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usb3-dmp-syscon = <&usb3_dmp>;
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#phy-cells = <0>;
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};
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};
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usb3_dmp: syscon@18105000 {
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reg = <0x18105000 0x1000>;
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};
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