dt-bindings: usb: Add NVIDIA Tegra234 XUSB host controller binding

Add device-tree binding documentation for the XUSB host controller present
on Tegra234 SoC. This controller supports the USB 3.1 specification.

Signed-off-by: Wayne Chang <waynec@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230111110450.24617-2-jonathanh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/usb/nvidia,tegra234-xusb.yaml b/Documentation/devicetree/bindings/usb/nvidia,tegra234-xusb.yaml
new file mode 100644 (file)
index 0000000..db761dc
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/nvidia,tegra234-xusb.yaml
@@ -0,0 +1,159 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/nvidia,tegra234-xusb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra234 xHCI controller
+
+maintainers:
+  - Thierry Reding <thierry.reding@gmail.com>
+  - Jon Hunter <jonathanh@nvidia.com>
+
+description: |
+  The Tegra xHCI controller supports both USB2 and USB3 interfaces exposed by
+  the Tegra XUSB pad controller. The xHCI controller controls up to eight
+  ports; there are four USB 2.0 ports and four USB 3.2 Gen1 x1 ports.
+
+properties:
+  compatible:
+    const: nvidia,tegra234-xusb
+
+  reg:
+    items:
+      - description: xHCI host registers
+      - description: XUSB FPCI registers
+      - description: XUSB bar2 registers
+
+  reg-names:
+    items:
+      - const: hcd
+      - const: fpci
+      - const: bar2
+
+  interrupts:
+    items:
+      - description: xHCI host interrupt
+      - description: mailbox interrupt
+
+  clocks:
+    items:
+      - description: XUSB host clock
+      - description: XUSB Falcon source clock
+      - description: XUSB SuperSpeed clock
+      - description: XUSB SuperSpeed source clock
+      - description: XUSB HighSpeed clock source
+      - description: XUSB FullSpeed clock source
+      - description: USB PLL
+      - description: reference clock
+      - description: I/O PLL
+
+  clock-names:
+    items:
+      - const: xusb_host
+      - const: xusb_falcon_src
+      - const: xusb_ss
+      - const: xusb_ss_src
+      - const: xusb_hs_src
+      - const: xusb_fs_src
+      - const: pll_u_480m
+      - const: clk_m
+      - const: pll_e
+
+  interconnects:
+    items:
+      - description: read client
+      - description: write client
+
+  interconnect-names:
+    items:
+      - const: dma-mem # read
+      - const: write
+
+  iommus:
+    maxItems: 1
+
+  nvidia,xusb-padctl:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to the XUSB pad controller that is used to configure
+      the USB pads used by the XHCI controller
+
+  phys:
+    minItems: 1
+    maxItems: 8
+
+  phy-names:
+    minItems: 1
+    maxItems: 8
+    items:
+      enum:
+        - usb2-0
+        - usb2-1
+        - usb2-2
+        - usb2-3
+        - usb3-0
+        - usb3-1
+        - usb3-2
+        - usb3-3
+
+  power-domains:
+    items:
+      - description: XUSBC power domain (for Host and USB 2.0)
+      - description: XUSBA power domain (for SuperSpeed)
+
+  power-domain-names:
+    items:
+      - const: xusb_host
+      - const: xusb_ss
+
+  dma-coherent: true
+
+allOf:
+  - $ref: usb-xhci.yaml
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/tegra234-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/memory/tegra234-mc.h>
+    #include <dt-bindings/power/tegra234-powergate.h>
+
+    usb@3610000 {
+        compatible = "nvidia,tegra234-xusb";
+        reg = <0x03610000 0x40000>,
+              <0x03600000 0x10000>,
+              <0x03650000 0x10000>;
+        reg-names = "hcd", "fpci", "bar2";
+
+        interrupts = <GIC_SPI 163 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
+
+        clocks = <&bpmp TEGRA234_CLK_XUSB_CORE_HOST>,
+                 <&bpmp TEGRA234_CLK_XUSB_FALCON>,
+                 <&bpmp TEGRA234_CLK_XUSB_CORE_SS>,
+                 <&bpmp TEGRA234_CLK_XUSB_SS>,
+                 <&bpmp TEGRA234_CLK_CLK_M>,
+                 <&bpmp TEGRA234_CLK_XUSB_FS>,
+                 <&bpmp TEGRA234_CLK_UTMIP_PLL>,
+                 <&bpmp TEGRA234_CLK_CLK_M>,
+                 <&bpmp TEGRA234_CLK_PLLE>;
+        clock-names = "xusb_host", "xusb_falcon_src",
+                      "xusb_ss", "xusb_ss_src", "xusb_hs_src",
+                      "xusb_fs_src", "pll_u_480m", "clk_m",
+                      "pll_e";
+        interconnects = <&mc TEGRA234_MEMORY_CLIENT_XUSB_HOSTR &emc>,
+                        <&mc TEGRA234_MEMORY_CLIENT_XUSB_HOSTW &emc>;
+        interconnect-names = "dma-mem", "write";
+        iommus = <&smmu_niso1 TEGRA234_SID_XUSB_HOST>;
+
+        power-domains = <&bpmp TEGRA234_POWER_DOMAIN_XUSBC>,
+                        <&bpmp TEGRA234_POWER_DOMAIN_XUSBA>;
+        power-domain-names = "xusb_host", "xusb_ss";
+
+        nvidia,xusb-padctl = <&xusb_padctl>;
+
+        phys = <&pad_lanes_usb2_0>;
+        phy-names = "usb2-0";
+    };