linux-kernel - [PATCH v5 1/3] dt-bindings: usb: cdns-imx8qm: add imx8qm cdns3 glue layer

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Message-Id: <20230327145523.3121810-2-Frank.Li@nxp.com>
Date:   Mon, 27 Mar 2023 10:55:21 -0400
From:   Frank Li <Frank.Li@....com>
To:     frank.li@....com
Cc:     devicetree@...r.kernel.org, festevam@...il.com,
        imx@...ts.linux.dev, kernel@...gutronix.de,
        krzysztof.kozlowski+dt@...aro.org, krzysztof.kozlowski@...aro.org,
        linux-arm-kernel@...ts.infradead.org, linux-imx@....com,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        s.hauer@...gutronix.de, shawnguo@...nel.org
Subject: [PATCH v5 1/3] dt-bindings: usb: cdns-imx8qm: add imx8qm cdns3 glue layer

NXP imx8qm integrates 1 cdns3 IP. This is glue layer device bindings.

Signed-off-by: Frank Li <Frank.Li@....com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---

Change from v4 to v5
- Use shorter clock name according to rob's comments

Change from v3 to v4
- Drop all clock-assign

Change from v2 to v3
- Drop two fixed frequency clocks, it is system reset value, no need set now.
If need, futher work/discuss on driver or dts change. It will not block this
basic enablement work.
- Drop lable
- Drop some descriptions
- Reg as second property.

Change from v1 to v2.
- new add binding doc

 .../bindings/usb/fsl,imx8qm-cdns3.yaml        | 103 ++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/fsl,imx8qm-cdns3.yaml

diff --git a/Documentation/devicetree/bindings/usb/fsl,imx8qm-cdns3.yaml b/Documentation/devicetree/bindings/usb/fsl,imx8qm-cdns3.yaml
new file mode 100644
index 000000000000..ceb76394af60
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/fsl,imx8qm-cdns3.yaml
@@ -0,0 +1,103 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2020 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/fsl,imx8qm-cdns3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP iMX8QM Soc USB Controller
+
+maintainers:
+  - Frank Li <Frank.Li@....com>
+
+properties:
+  compatible:
+    const: fsl,imx8qm-usb3
+
+  reg:
+    items:
+      - description: Register set for iMX USB3 Platform Control
+
+  "#address-cells":
+    enum: [ 1, 2 ]
+
+  "#size-cells":
+    enum: [ 1, 2 ]
+
+  ranges: true
+
+  clocks:
+    items:
+      - description: Standby clock. Used during ultra low power states.
+      - description: USB bus clock for usb3 controller.
+      - description: AXI clock for AXI interface.
+      - description: ipg clock for register access.
+      - description: Core clock for usb3 controller.
+
+  clock-names:
+    items:
+      - const: lpm
+      - const: bus
+      - const: aclk
+      - const: ipg
+      - const: core
+
+  power-domains:
+    maxItems: 1
+
+# Required child node:
+
+patternProperties:
+  "^usb@[0-9a-f]+$":
+    $ref: cdns,usb3.yaml#
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+  - clocks
+  - clock-names
+  - power-domains
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8-lpcg.h>
+    #include <dt-bindings/firmware/imx/rsrc.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    usb@...10000 {
+      compatible = "fsl,imx8qm-usb3";
+      reg = <0x5b110000 0x10000>;
+      ranges;
+      clocks = <&usb3_lpcg IMX_LPCG_CLK_1>,
+               <&usb3_lpcg IMX_LPCG_CLK_0>,
+               <&usb3_lpcg IMX_LPCG_CLK_7>,
+               <&usb3_lpcg IMX_LPCG_CLK_4>,
+               <&usb3_lpcg IMX_LPCG_CLK_5>;
+      clock-names = "lpm", "bus", "aclk", "ipg", "core";
+      assigned-clocks = <&clk IMX_SC_R_USB_2 IMX_SC_PM_CLK_MST_BUS>;
+      assigned-clock-rates = <250000000>;
+      power-domains = <&pd IMX_SC_R_USB_2>;
+      #address-cells = <1>;
+      #size-cells = <1>;
+
+      usb@...20000 {
+        compatible = "cdns,usb3";
+        reg = <0x5b120000 0x10000>,   /* memory area for OTG/DRD registers */
+              <0x5b130000 0x10000>,   /* memory area for HOST registers */
+              <0x5b140000 0x10000>;   /* memory area for DEVICE registers */
+        reg-names = "otg", "xhci", "dev";
+        interrupt-parent = <&gic>;
+        interrupts = <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "host", "peripheral", "otg", "wakeup";
+        phys = <&usb3_phy>;
+        phy-names = "cdns3,usb3-phy";
+      };
+    };
-- 
2.34.1