dt: bindings: net: add bindings of WCN6750 for ath11k

WCN6750 is the WLAN chip on Qualcomm Snapdragon SoC SC7280;
Though being a PCIe based solution, it is not attached to
the APSS processor (Application Processor SubSystem), it is
instead attached to another tiny processor called WPSS Q6
processor (Wireless Processor SubSystem) on the SC7280 MSM,
where the WLAN firmware runs, and it is the WLAN firmware
running on the Q6 processor which enumerates WCN6750, as a
result APPS processor would never know such a device being
present in the system and would not detect the WCN6750
hardware unless and otherwise WCN6750 is registered as a
platform device. This is the reason behind adding WCN6750
WLAN node in the device tree.

Add WCN6750 wireless driver support, its based on ath11k driver.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Manikanta Pubbisetty <quic_mpubbise@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220429170502.20080-2-quic_mpubbise@quicinc.com

Documentation/devicetree/bindings/net/wireless/qcom,ath11k.yaml

@@ -20,10 +20,70 @@ properties:
     enum:
       - qcom,ipq8074-wifi
       - qcom,ipq6018-wifi
+      - qcom,wcn6750-wifi
 
   reg:
     maxItems: 1
 
+  interrupts:
+    minItems: 32
+    maxItems: 52
+
+  interrupt-names:
+    maxItems: 52
+
+  qcom,rproc:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      DT entry of q6v5-wcss remoteproc driver.
+      Phandle to a node that can contain the following properties
+        * compatible
+        * reg
+        * reg-names
+
+  qcom,ath11k-calibration-variant:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      string to uniquely identify variant of the calibration data in the
+      board-2.bin for designs with colliding bus and device specific ids
+
+  memory-region:
+    minItems: 1
+    maxItems: 2
+    description:
+      phandle to a node describing reserved memory (System RAM memory)
+      used by ath11k firmware (see bindings/reserved-memory/reserved-memory.txt)
+
+  iommus:
+    minItems: 1
+    maxItems: 2
+
+  wifi-firmware:
+    type: object
+    description: |
+      WCN6750 wifi node can contain one optional firmware subnode.
+      Firmware subnode is needed when the platform does not have Trustzone.
+    required:
+      - iommus
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - qcom,rproc
+
+additionalProperties: false
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,ipq8074-wifi
+              - qcom,ipq6018-wifi
+    then:
+      properties:
         interrupts:
           items:
             - description: misc-pulse1 interrupt events
@@ -78,8 +138,6 @@ properties:
             - description: interrupt event for ring wbm2host-tx-completions-ring2
             - description: interrupt event for ring wbm2host-tx-completions-ring1
             - description: interrupt event for ring tcl2host-status-ring
-
-
         interrupt-names:
           items:
             - const: misc-pulse1
@@ -135,35 +193,59 @@ properties:
             - const: wbm2host-tx-completions-ring1
             - const: tcl2host-status-ring
 
-  qcom,rproc:
-    $ref: /schemas/types.yaml#/definitions/phandle
-    description:
-      DT entry of q6v5-wcss remoteproc driver.
-      Phandle to a node that can contain the following properties
-        * compatible
-        * reg
-        * reg-names
-
-  qcom,ath11k-calibration-variant:
-    $ref: /schemas/types.yaml#/definitions/string
-    description:
-      string to uniquely identify variant of the calibration data in the
-      board-2.bin for designs with colliding bus and device specific ids
-
-  memory-region:
-    maxItems: 1
-    description:
-      phandle to a node describing reserved memory (System RAM memory)
-      used by ath11k firmware (see bindings/reserved-memory/reserved-memory.txt)
-
-required:
-  - compatible
-  - reg
-  - interrupts
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,ipq8074-wifi
+              - qcom,ipq6018-wifi
+    then:
+      required:
         - interrupt-names
-  - qcom,rproc
 
-additionalProperties: false
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,wcn6750-wifi
+    then:
+      properties:
+        interrupts:
+          items:
+            - description: interrupt event for ring CE1
+            - description: interrupt event for ring CE2
+            - description: interrupt event for ring CE3
+            - description: interrupt event for ring CE4
+            - description: interrupt event for ring CE5
+            - description: interrupt event for ring CE6
+            - description: interrupt event for ring CE7
+            - description: interrupt event for ring CE8
+            - description: interrupt event for ring CE9
+            - description: interrupt event for ring CE10
+            - description: interrupt event for ring DP1
+            - description: interrupt event for ring DP2
+            - description: interrupt event for ring DP3
+            - description: interrupt event for ring DP4
+            - description: interrupt event for ring DP5
+            - description: interrupt event for ring DP6
+            - description: interrupt event for ring DP7
+            - description: interrupt event for ring DP8
+            - description: interrupt event for ring DP9
+            - description: interrupt event for ring DP10
+            - description: interrupt event for ring DP11
+            - description: interrupt event for ring DP12
+            - description: interrupt event for ring DP13
+            - description: interrupt event for ring DP14
+            - description: interrupt event for ring DP15
+            - description: interrupt event for ring DP16
+            - description: interrupt event for ring DP17
+            - description: interrupt event for ring DP18
+            - description: interrupt event for ring DP19
+            - description: interrupt event for ring DP20
+            - description: interrupt event for ring DP21
+            - description: interrupt event for ring DP22
 
 examples:
   - |
@@ -309,3 +391,64 @@ examples:
             };
         };
     };
+
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    reserved-memory {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        wlan_ce_mem: memory@4cd000 {
+            no-map;
+            reg = <0x0 0x004cd000 0x0 0x1000>;
+        };
+
+        wlan_fw_mem: memory@80c00000 {
+            no-map;
+            reg = <0x0 0x80c00000 0x0 0xc00000>;
+        };
+    };
+
+    wifi: wifi@17a10040 {
+        compatible = "qcom,wcn6750-wifi";
+        reg = <0x17a10040 0x0>;
+        iommus = <&apps_smmu 0x1c00 0x1>;
+        interrupts = <GIC_SPI 768 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 769 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 770 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 771 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 772 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 773 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 774 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 775 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 776 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 777 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 778 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 779 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 780 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 781 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 782 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 783 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 784 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 785 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 786 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 787 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 788 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 789 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 790 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 791 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 792 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 793 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 794 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 795 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 796 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 797 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 798 IRQ_TYPE_EDGE_RISING>,
+                     <GIC_SPI 799 IRQ_TYPE_EDGE_RISING>;
+        qcom,rproc = <&remoteproc_wpss>;
+        memory-region = <&wlan_fw_mem>, <&wlan_ce_mem>;
+        wifi-firmware {
+                iommus = <&apps_smmu 0x1c02 0x1>;
+        };
+    };