dt-bindings: usb: Add NVIDIA Tegra XUSB controller binding

NVIDIA Tegra xHCI controller

============================

The Tegra xHCI controller supports both USB2 and USB3 interfaces exposed by

the Tegra XUSB pad controller.

Required properties:

--------------------

- compatible: Must be:

  - Tegra124: "nvidia,tegra124-xusb"

  - Tegra132: "nvidia,tegra132-xusb", "nvidia,tegra124-xusb"

- reg: Must contain the base and length of the xHCI host registers, XUSB FPCI

  registers and XUSB IPFS registers.

- reg-names: Must contain the following entries:

  - "hcd"

  - "fpci"

  - "ipfs"

- interrupts: Must contain the xHCI host interrupt and the mailbox interrupt.

- clocks: Must contain an entry for each entry in clock-names.

  See ../clock/clock-bindings.txt for details.

- clock-names: Must include the following entries:

   - xusb_host

   - xusb_host_src

   - xusb_falcon_src

   - xusb_ss

   - xusb_ss_src

   - xusb_ss_div2

   - xusb_hs_src

   - xusb_fs_src

   - pll_u_480m

   - clk_m

   - pll_e

- resets: Must contain an entry for each entry in reset-names.

  See ../reset/reset.txt for details.

- reset-names: Must include the following entries:

  - xusb_host

  - xusb_ss

  - xusb_src

  Note that xusb_src is the shared reset for xusb_{ss,hs,fs,falcon,host}_src.

- nvidia,xusb-padctl: phandle to the XUSB pad controller that is used to

  configure the USB pads used by the XHCI controller

For Tegra124 and Tegra132:

- avddio-pex-supply: PCIe/USB3 analog logic power supply. Must supply 1.05 V.

- dvddio-pex-supply: PCIe/USB3 digital logic power supply. Must supply 1.05 V.

- avdd-usb-supply: USB controller power supply. Must supply 3.3 V.

- avdd-pll-utmip-supply: UTMI PLL power supply. Must supply 1.8 V.

- avdd-pll-erefe-supply: PLLE reference PLL power supply. Must supply 1.05 V.

- avdd-usb-ss-pll-supply: PCIe/USB3 PLL power supply. Must supply 1.05 V.

- hvdd-usb-ss-supply: High-voltage PCIe/USB3 power supply. Must supply 3.3 V.

- hvdd-usb-ss-pll-e-supply: High-voltage PLLE power supply. Must supply 3.3 V.

Optional properties:

--------------------

- phys: Must contain an entry for each entry in phy-names.

  See ../phy/phy-bindings.txt for details.

- phy-names: Should include an entry for each PHY used by the controller. The

  following PHYs are available:

  - Tegra124: usb2-0, usb2-1, usb2-2, hsic-0, hsic-1, usb3-0, usb3-1

  - Tegra132: usb2-0, usb2-1, usb2-2, hsic-0, hsic-1, usb3-0, usb3-1

Example:

--------

	usb@0,70090000 {

		compatible = "nvidia,tegra124-xusb";

		reg = <0x0 0x70090000 0x0 0x8000>,

		      <0x0 0x70098000 0x0 0x1000>,

		      <0x0 0x70099000 0x0 0x1000>;

		reg-names = "hcd", "fpci", "ipfs";

		interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,

			     <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&tegra_car TEGRA124_CLK_XUSB_HOST>,

			 <&tegra_car TEGRA124_CLK_XUSB_HOST_SRC>,

			 <&tegra_car TEGRA124_CLK_XUSB_FALCON_SRC>,

			 <&tegra_car TEGRA124_CLK_XUSB_SS>,

			 <&tegra_car TEGRA124_CLK_XUSB_SS_DIV2>,

			 <&tegra_car TEGRA124_CLK_XUSB_SS_SRC>,

			 <&tegra_car TEGRA124_CLK_XUSB_HS_SRC>,

			 <&tegra_car TEGRA124_CLK_XUSB_FS_SRC>,

			 <&tegra_car TEGRA124_CLK_PLL_U_480M>,

			 <&tegra_car TEGRA124_CLK_CLK_M>,

			 <&tegra_car TEGRA124_CLK_PLL_E>;

		clock-names = "xusb_host", "xusb_host_src", "xusb_falcon_src",

			      "xusb_ss", "xusb_ss_div2", "xusb_ss_src",

			      "xusb_hs_src", "xusb_fs_src", "pll_u_480m",

			      "clk_m", "pll_e";

		resets = <&tegra_car 89>, <&tegra_car 156>, <&tegra_car 143>;

		reset-names = "xusb_host", "xusb_ss", "xusb_src";

		nvidia,xusb-padctl = <&padctl>;

		phys = <&{/padctl@0,7009f000/pads/usb2/usb2-1}>, /* mini-PCIe USB */

		       <&{/padctl@0,7009f000/pads/usb2/usb2-2}>, /* USB A */

		       <&{/padctl@0,7009f000/pads/pcie/pcie-0}>; /* USB A */

		phy-names = "utmi-1", "utmi-2", "usb3-0";

		avddio-pex-supply = <&vdd_1v05_run>;

		dvddio-pex-supply = <&vdd_1v05_run>;

		avdd-usb-supply = <&vdd_3v3_lp0>;

		avdd-pll-utmip-supply = <&vddio_1v8>;

		avdd-pll-erefe-supply = <&avdd_1v05_run>;

		avdd-usb-ss-pll-supply = <&vdd_1v05_run>;

		hvdd-usb-ss-supply = <&vdd_3v3_lp0>;

		hvdd-usb-ss-pll-e-supply = <&vdd_3v3_lp0>;

	};