dt-bindings: pci: ti,j721e: Fix "ti,syscon-pcie-ctrl" to take argument

Fix binding documentation of "ti,syscon-pcie-ctrl" to take phandle with
argument. The argument is the register offset within "syscon" used to
configure PCIe controller. This change is as discussed in [1]

[1] -> http://lore.kernel.org/r/CAL_JsqKiUcO76bo1GoepWM1TusJWoty_BRy2hFSgtEVMqtrvvQ@mail.gmail.com

Link: https://lore.kernel.org/r/20201210124917.24185-2-kishon@ti.com
Fixes: 431b53b8 ("dt-bindings: PCI: Add host mode dt-bindings for TI's J721E SoC")
Fixes: 45b39e92 ("dt-bindings: PCI: Add EP mode dt-bindings for TI's J721E SoC")
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/pci/ti,j721e-pci-ep.yaml

@@ -29,9 +29,12 @@ properties:
       - const: mem
 
   ti,syscon-pcie-ctrl:
-    description: Phandle to the SYSCON entry required for configuring PCIe mode
-                 and link speed.
-    $ref: /schemas/types.yaml#/definitions/phandle
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: Phandle to the SYSCON entry
+          - description: pcie_ctrl register offset within SYSCON
+    description: Specifier for configuring PCIe mode and link speed.
 
   power-domains:
     maxItems: 1
@@ -79,7 +82,7 @@ examples:
                  <0x00 0x0d000000 0x00 0x00800000>,
                  <0x00 0x10000000 0x00 0x08000000>;
            reg-names = "intd_cfg", "user_cfg", "reg", "mem";
-           ti,syscon-pcie-ctrl = <&pcie0_ctrl>;
+           ti,syscon-pcie-ctrl = <&pcie0_ctrl 0x4070>;
            max-link-speed = <3>;
            num-lanes = <2>;
            power-domains = <&k3_pds 239 TI_SCI_PD_EXCLUSIVE>;

Documentation/devicetree/bindings/pci/ti,j721e-pci-host.yaml

@@ -29,9 +29,12 @@ properties:
       - const: cfg
 
   ti,syscon-pcie-ctrl:
-    description: Phandle to the SYSCON entry required for configuring PCIe mode
-      and link speed.
-    $ref: /schemas/types.yaml#/definitions/phandle
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: Phandle to the SYSCON entry
+          - description: pcie_ctrl register offset within SYSCON
+    description: Specifier for configuring PCIe mode and link speed.
 
   power-domains:
     maxItems: 1
@@ -90,7 +93,7 @@ examples:
                   <0x00 0x0d000000 0x00 0x00800000>,
                   <0x00 0x10000000 0x00 0x00001000>;
             reg-names = "intd_cfg", "user_cfg", "reg", "cfg";
-            ti,syscon-pcie-ctrl = <&pcie0_ctrl>;
+            ti,syscon-pcie-ctrl = <&pcie0_ctrl 0x4070>;
             max-link-speed = <3>;
             num-lanes = <2>;
             power-domains = <&k3_pds 239 TI_SCI_PD_EXCLUSIVE>;