| * Renesas R-Car generation 3 USB 3.0 PHY |
| |
| This file provides information on what the device node for the R-Car generation |
| 3 USB 3.0 PHY contains. |
| If you want to enable spread spectrum clock (ssc), you should use USB_EXTAL |
| instead of USB3_CLK. However, if you don't want to these features, you don't |
| need this driver. |
| |
| Required properties: |
| - compatible: "renesas,r8a7795-usb3-phy" if the device is a part of an R8A7795 |
| SoC. |
| "renesas,r8a7796-usb3-phy" if the device is a part of an R8A7796 |
| SoC. |
| "renesas,r8a77965-usb3-phy" if the device is a part of an |
| R8A77965 SoC. |
| "renesas,rcar-gen3-usb3-phy" for a generic R-Car Gen3 compatible |
| device. |
| |
| When compatible with the generic version, nodes must list the |
| SoC-specific version corresponding to the platform first |
| followed by the generic version. |
| |
| - reg: offset and length of the USB 3.0 PHY register block. |
| - clocks: A list of phandles and clock-specifier pairs. |
| - clock-names: Name of the clocks. |
| - The funcional clock must be "usb3-if". |
| - The usb3's external clock must be "usb3s_clk". |
| - The usb2's external clock must be "usb_extal". If you want to use the ssc, |
| the clock-frequency must not be 0. |
| - #phy-cells: see phy-bindings.txt in the same directory, must be <0>. |
| |
| Optional properties: |
| - renesas,ssc-range: Enable/disable spread spectrum clock (ssc) by using |
| the following values as u32: |
| - 0 (or the property doesn't exist): disable the ssc |
| - 4980: enable the ssc as -4980 ppm |
| - 4492: enable the ssc as -4492 ppm |
| - 4003: enable the ssc as -4003 ppm |
| |
| Example (R-Car H3): |
| |
| usb-phy@e65ee000 { |
| compatible = "renesas,r8a7795-usb3-phy", |
| "renesas,rcar-gen3-usb3-phy"; |
| reg = <0 0xe65ee000 0 0x90>; |
| clocks = <&cpg CPG_MOD 328>, <&usb3s0_clk>, <&usb_extal>; |
| clock-names = "usb3-if", "usb3s_clk", "usb_extal"; |
| }; |