doc/device-tree-bindings/phy/phy-stm32-usbphyc.txt

   1 STMicroelectronics STM32 USB HS PHY controller
   2
   3 The STM32 USBPHYC block contains a dual port High Speed UTMI+ PHY and a UTMI
   4 switch. It controls PHY configuration and status, and the UTMI+ switch that
   5 selects either OTG or HOST controller for the second PHY port. It also sets
   6 PLL configuration.
   7
   8 USBPHYC
   9       |_ PLL
  10       |
  11       |_ PHY port#1 _________________ HOST controller
  12       |                    _                 |
  13       |                  / 1|________________|
  14       |_ PHY port#2 ----|   |________________
  15       |                  \_0|                |
  16       |_ UTMI switch_______|          OTG controller
  17
  18
  19 Phy provider node
  20 =================
  21
  22 Required properties:
  23 - compatible: must be "st,stm32mp1-usbphyc"
  24 - reg: address and length of the usb phy control register set
  25 - clocks: phandle + clock specifier for the PLL phy clock
  26 - vdda1v1-supply: phandle to the regulator providing 1V1 power to the PHY
  27 - vdda1v8-supply: phandle to the regulator providing 1V8 power to the PHY
  28 - #address-cells: number of address cells for phys sub-nodes, must be <1>
  29 - #size-cells: number of size cells for phys sub-nodes, must be <0>
  30
  31 Optional properties:
  32 - assigned-clocks: phandle + clock specifier for the PLL phy clock
  33 - assigned-clock-parents: the PLL phy clock parent
  34 - resets: phandle + reset specifier
  35
  36 Required nodes: one sub-node per port the controller provides.
  37
  38 Phy sub-nodes
  39 ==============
  40
  41 Required properties:
  42 - reg: phy port index
  43 - phy-supply: phandle to the regulator providing 3V3 power to the PHY,
  44               see phy-bindings.txt in the same directory.
  45 - #phy-cells: see phy-bindings.txt in the same directory, must be <0> for PHY
  46   port#1 and must be <1> for PHY port#2, to select USB controller
  47
  48 Optional properties:
  49 - vbus-supply: phandle to the regulator providing 5V vbus to the USB connector
  50
  51 Example:
  52                 usbphyc: usb-phy@5a006000 {
  53                         compatible = "st,stm32mp1-usbphyc";
  54                         reg = <0x5a006000 0x1000>;
  55                         clocks = <&rcc_clk USBPHY_K>;
  56                         resets = <&rcc_rst USBPHY_R>;
  57                         #address-cells = <1>;
  58                         #size-cells = <0>;
  59
  60                         usbphyc_port0: usb-phy@0 {
  61                                 reg = <0>;
  62                                 phy-supply = <&vdd_usb>;
  63                                 vdda1v1-supply = <&reg11>;
  64                                 vdda1v8-supply = <&reg18>
  65                                 #phy-cells = <0>;
  66                         };
  67
  68                         usbphyc_port1: usb-phy@1 {
  69                                 reg = <1>;
  70                                 phy-supply = <&vdd_usb>;
  71                                 vdda1v1-supply = <&reg11>;
  72                                 vdda1v8-supply = <&reg18>
  73                                 #phy-cells = <1>;
  74                         };
  75                 };