dt-bindings: PCI: mediatek: Add support for Airoha AN7583

Introduce Airoha AN7583 SoC compatible in mediatek PCIe controller
binding.

Similar to GEN3, the Airoha AN7583 GEN2 PCIe controller require the
PBUS csr property to permit the correct functionality of the PCIe
controller.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20251020111121.31779-3-ansuelsmth@gmail.com

Author: Ansuel

Documentation/devicetree/bindings/pci/mediatek-pcie.yaml

@@ -13,6 +13,7 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - airoha,an7583-pcie
           - mediatek,mt2712-pcie
           - mediatek,mt7622-pcie
           - mediatek,mt7629-pcie
@@ -40,6 +41,12 @@ properties:
       - enum: [ obff_ck0, obff_ck1 ]
       - enum: [ pipe_ck0, pipe_ck1 ]
 
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: pcie-rst1
+
   interrupts:
     maxItems: 1
 
@@ -55,6 +62,17 @@ properties:
   power-domains:
     maxItems: 1
 
+  mediatek,pbus-csr:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle to pbus-csr syscon
+          - description: offset of pbus-csr base address register
+          - description: offset of pbus-csr base address mask register
+    description:
+      Phandle with two arguments to the syscon node used to detect if
+      a given address is accessible on PCIe controller.
+
   '#interrupt-cells':
     const: 1
 
@@ -90,6 +108,33 @@ required:
 allOf:
   - $ref: /schemas/pci/pci-host-bridge.yaml#
 
+  - if:
+      properties:
+        compatible:
+          const: airoha,an7583-pcie
+    then:
+      properties:
+        reg-names:
+          const: port1
+
+        clocks:
+          maxItems: 1
+
+        clock-names:
+          const: sys_ck1
+
+        phy-names:
+          const: pcie-phy1
+
+        power-domain: false
+
+      required:
+        - resets
+        - reset-names
+        - phys
+        - phy-names
+        - mediatek,pbus-csr
+
   - if:
       properties:
         compatible:
@@ -104,8 +149,14 @@ allOf:
           minItems: 2
           maxItems: 2
 
+        reset: false
+
+        reset-names: false
+
         power-domains: false
 
+        mediatek,pbus-csr: false
+
       required:
         - phys
         - phy-names
@@ -119,10 +170,16 @@ allOf:
         clocks:
           minItems: 6
 
+        reset: false
+
+        reset-names: false
+
         phys: false
 
         phy-names: false
 
+        mediatek,pbus-csr: false
+
       required:
         - power-domains
 
@@ -135,6 +192,12 @@ allOf:
         clocks:
           minItems: 6
 
+        reset: false
+
+        reset-names: false
+
+        mediatek,pbus-csr: false
+
       required:
         - power-domains
 
@@ -151,12 +214,18 @@ allOf:
         clock-names:
           maxItems: 1
 
+        reset: false
+
+        reset-names: false
+
         phys: false
 
         phy-names: false
 
         power-domain: false
 
+        mediatek,pbus-csr: false
+
 unevaluatedProperties: false
 
 examples:
@@ -316,3 +385,54 @@ examples:
             };
         };
     };
+
+  # AN7583
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/en7523-clk.h>
+
+    soc_3 {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie@1fa92000 {
+            compatible = "airoha,an7583-pcie";
+            device_type = "pci";
+            linux,pci-domain = <1>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+
+            reg = <0x0 0x1fa92000 0x0 0x1670>;
+            reg-names = "port1";
+
+            clocks = <&scuclk EN7523_CLK_PCIE>;
+            clock-names = "sys_ck1";
+
+            phys = <&pciephy>;
+            phy-names = "pcie-phy1";
+
+            ranges = <0x02000000 0 0x24000000 0x0 0x24000000 0 0x4000000>;
+
+            resets = <&scuclk>; /* AN7583_PCIE1_RST */
+            reset-names = "pcie-rst1";
+
+            mediatek,pbus-csr = <&pbus_csr 0x8 0xc>;
+
+            interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "pcie_irq";
+            bus-range = <0x00 0xff>;
+            #interrupt-cells = <1>;
+            interrupt-map-mask = <0 0 0 7>;
+            interrupt-map = <0 0 0 1 &pcie_intc1 0>,
+                            <0 0 0 2 &pcie_intc1 1>,
+                            <0 0 0 3 &pcie_intc1 2>,
+                            <0 0 0 4 &pcie_intc1 3>;
+
+            pcie_intc1_4: interrupt-controller {
+                interrupt-controller;
+                #address-cells = <0>;
+                #interrupt-cells = <1>;
+            };
+        };
+    };