dt-bindings: phy: Add binding doc for Stingray PCIe PHY

Add binding document for Stingray PCIe PHYs for both PAXB and PAXC based
root complex

Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Ray Jui 2018-07-06 17:18:32 -07:00 committed by Kishon Vijay Abraham I
parent 5b9d2e8fb5
commit 95fb21253e

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Broadcom Stingray PCIe PHY
Required properties:
- compatible: must be "brcm,sr-pcie-phy"
- reg: base address and length of the PCIe SS register space
- brcm,sr-cdru: phandle to the CDRU syscon node
- brcm,sr-mhb: phandle to the MHB syscon node
- #phy-cells: Must be 1, denotes the PHY index
For PAXB based root complex, one can have a configuration of up to 8 PHYs
PHY index goes from 0 to 7
For the internal PAXC based root complex, PHY index is always 8
Example:
mhb: syscon@60401000 {
compatible = "brcm,sr-mhb", "syscon";
reg = <0 0x60401000 0 0x38c>;
};
cdru: syscon@6641d000 {
compatible = "brcm,sr-cdru", "syscon";
reg = <0 0x6641d000 0 0x400>;
};
pcie_phy: phy@40000000 {
compatible = "brcm,sr-pcie-phy";
reg = <0 0x40000000 0 0x800>;
brcm,sr-cdru = <&cdru>;
brcm,sr-mhb = <&mhb>;
#phy-cells = <1>;
};
/* users of the PCIe PHY */
pcie0: pcie@48000000 {
...
...
phys = <&pcie_phy 0>;
phy-names = "pcie-phy";
};