78 lines
2.4 KiB
Plaintext
78 lines
2.4 KiB
Plaintext
STMicroelectronics STi MIPHY365x PHY binding
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============================================
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This binding describes a miphy device that is used to control PHY hardware
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for SATA and PCIe.
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Required properties (controller (parent) node):
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- compatible : Should be "st,miphy365x-phy"
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- st,syscfg : Phandle / integer array property. Phandle of sysconfig group
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containing the miphy registers and integer array should contain
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an entry for each port sub-node, specifying the control
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register offset inside the sysconfig group.
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Required nodes : A sub-node is required for each channel the controller
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provides. Address range information including the usual
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'reg' and 'reg-names' properties are used inside these
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nodes to describe the controller's topology. These nodes
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are translated by the driver's .xlate() function.
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Required properties (port (child) node):
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- #phy-cells : Should be 1 (See second example)
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Cell after port phandle is device type from:
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- PHY_TYPE_SATA
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- PHY_TYPE_PCI
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- reg : Address and length of register sets for each device in
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"reg-names"
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- reg-names : The names of the register addresses corresponding to the
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registers filled in "reg":
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- sata: For SATA devices
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- pcie: For PCIe devices
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Optional properties (port (child) node):
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- st,sata-gen : Generation of locally attached SATA IP. Expected values
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are {1,2,3). If not supplied generation 1 hardware will
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be expected
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- st,pcie-tx-pol-inv : Bool property to invert the polarity PCIe Tx (Txn/Txp)
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- st,sata-tx-pol-inv : Bool property to invert the polarity SATA Tx (Txn/Txp)
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Example:
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miphy365x_phy: miphy365x@fe382000 {
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compatible = "st,miphy365x-phy";
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st,syscfg = <&syscfg_rear 0x824 0x828>;
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#address-cells = <1>;
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#size-cells = <1>;
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ranges;
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phy_port0: port@fe382000 {
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reg = <0xfe382000 0x100>, <0xfe394000 0x100>;
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reg-names = "sata", "pcie";
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#phy-cells = <1>;
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st,sata-gen = <3>;
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};
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phy_port1: port@fe38a000 {
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reg = <0xfe38a000 0x100>, <0xfe804000 0x100>;;
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reg-names = "sata", "pcie", "syscfg";
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#phy-cells = <1>;
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st,pcie-tx-pol-inv;
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};
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};
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Specifying phy control of devices
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=================================
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Device nodes should specify the configuration required in their "phys"
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property, containing a phandle to the phy port node and a device type.
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Example:
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#include <dt-bindings/phy/phy.h>
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sata0: sata@fe380000 {
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...
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phys = <&phy_port0 PHY_TYPE_SATA>;
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...
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};
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