dt-bindings: phy: Add i.MX8Q HSIO SerDes PHY binding

Add i.MX8QM and i.MX8QXP HSIO SerDes PHY binding.
Introduce one HSIO configuration 'fsl,hsio-cfg', which need be set at
initialization according to board design.

Signed-off-by: Richard Zhu <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: Richard Zhu

Documentation/devicetree/bindings/phy/fsl,imx8qm-hsio.yaml

@@ -0,0 +1,164 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/fsl,imx8qm-hsio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX8QM SoC series High Speed IO(HSIO) SERDES PHY
+
+maintainers:
+  - Richard Zhu <[email protected]>
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx8qm-hsio
+      - fsl,imx8qxp-hsio
+  reg:
+    items:
+      - description: Base address and length of the PHY block
+      - description: HSIO control and status registers(CSR) of the PHY
+      - description: HSIO CSR of the controller bound to the PHY
+      - description: HSIO CSR for MISC
+
+  reg-names:
+    items:
+      - const: reg
+      - const: phy
+      - const: ctrl
+      - const: misc
+
+  "#phy-cells":
+    const: 3
+    description:
+      The first defines lane index.
+      The second defines the type of the PHY refer to the include phy.h.
+      The third defines the controller index, indicated which controller
+      is bound to the lane.
+
+  clocks:
+    minItems: 5
+    maxItems: 14
+
+  clock-names:
+    minItems: 5
+    maxItems: 14
+
+  fsl,hsio-cfg:
+    description: |
+      Specifies the use case of the HSIO module in the hardware design.
+      Regarding the design of i.MX8QM HSIO subsystem, HSIO module can be
+      confiured as following three use cases.
+      +---------------------------------------+
+      |                  | i.MX8QM            |
+      |------------------|--------------------|
+      |                  | Lane0| Lane1| Lane2|
+      |------------------|------|------|------|
+      | pciea-x2-sata    | PCIEA| PCIEA| SATA |
+      |------------------|------|------|------|
+      | pciea-x2-pcieb   | PCIEA| PCIEA| PCIEB|
+      |------------------|------|------|------|
+      | pciea-pcieb-sata | PCIEA| PCIEB| SATA |
+      +---------------------------------------+
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ pciea-x2-sata, pciea-x2-pcieb, pciea-pcieb-sata]
+    default: pciea-pcieb-sata
+
+  fsl,refclk-pad-mode:
+    description:
+      Specifies the mode of the refclk pad used. INPUT(PHY refclock is
+      provided externally via the refclk pad) or OUTPUT(PHY refclock is
+      derived from SoC internal source and provided on the refclk pad).
+      This property not exists means unused(PHY refclock is derived from
+      SoC internal source).
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ input, output, unused ]
+    default: unused
+
+  power-domains:
+    minItems: 1
+    maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - "#phy-cells"
+  - clocks
+  - clock-names
+  - fsl,hsio-cfg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8qxp-hsio
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: pclk0
+            - const: apb_pclk0
+            - const: phy0_crr
+            - const: ctl0_crr
+            - const: misc_crr
+        power-domains:
+          maxItems: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx8qm-hsio
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: pclk0
+            - const: pclk1
+            - const: apb_pclk0
+            - const: apb_pclk1
+            - const: pclk2
+            - const: epcs_tx
+            - const: epcs_rx
+            - const: apb_pclk2
+            - const: phy0_crr
+            - const: phy1_crr
+            - const: ctl0_crr
+            - const: ctl1_crr
+            - const: ctl2_crr
+            - const: misc_crr
+        power-domains:
+          minItems: 2
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8-clock.h>
+    #include <dt-bindings/clock/imx8-lpcg.h>
+    #include <dt-bindings/firmware/imx/rsrc.h>
+    #include <dt-bindings/phy/phy-imx8-pcie.h>
+
+    phy@5f1a0000 {
+        compatible = "fsl,imx8qxp-hsio";
+        reg = <0x5f1a0000 0x10000>,
+              <0x5f120000 0x10000>,
+              <0x5f140000 0x10000>,
+              <0x5f160000 0x10000>;
+        reg-names = "reg", "phy", "ctrl", "misc";
+        clocks = <&phyx1_lpcg IMX_LPCG_CLK_0>,
+                 <&phyx1_lpcg IMX_LPCG_CLK_4>,
+                 <&phyx1_crr1_lpcg IMX_LPCG_CLK_4>,
+                 <&pcieb_crr3_lpcg IMX_LPCG_CLK_4>,
+                 <&misc_crr5_lpcg IMX_LPCG_CLK_4>;
+        clock-names = "pclk0", "apb_pclk0", "phy0_crr", "ctl0_crr", "misc_crr";
+        power-domains = <&pd IMX_SC_R_SERDES_1>;
+        #phy-cells = <3>;
+        fsl,hsio-cfg = "pciea-pcieb-sata";
+        fsl,refclk-pad-mode = "input";
+    };
+...