dt-bindings: PCI: qcom: Move PHY & reset GPIO to Root Port node

Move the phys, phy-names, reset-gpios properties to the PCIe Root Port node
from Host Bridge node, as agreed upon here [1].

Update the qcom,pcie-common.yaml to include the 'phys' property in the Root
Port node. 'phy-names' property is not needed in Root Port since each Root
Port supports only one PHY. Also, there is already 'reset-gpios' property
defined for PERST# in pci-bus-common.yaml, so use that property instead of
'perst-gpios'.

For backward compatibility, do not remove any existing properties in the
bridge node, but mark them as 'deprecated' instead.

[1] https://lore.kernel.org/linux-pci/20241211192014.GA3302752@bhelgaas/

Signed-off-by: Krishna Chaitanya Chundru <[email protected]>
[mani: commit message rewording]
Signed-off-by: Manivannan Sadhasivam <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Rob Herring (Arm) <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: krishnachaitanya-linux

Documentation/devicetree/bindings/pci/qcom,pcie-common.yaml

@@ -51,10 +51,18 @@ properties:
 
   phys:
     maxItems: 1
+    deprecated: true
+    description:
+      This property is deprecated, instead of referencing this property from
+      the host bridge node, use the property from the PCIe root port node.
 
   phy-names:
     items:
       - const: pciephy
+    deprecated: true
+    description:
+      Phandle to the register map node. This property is deprecated, and not
+      required to add in the root port also, as the root port has only one phy.
 
   power-domains:
     maxItems: 1
@@ -71,12 +79,18 @@ properties:
     maxItems: 12
 
   perst-gpios:
-    description: GPIO controlled connection to PERST# signal
+    description: GPIO controlled connection to PERST# signal. This property is
+      deprecated, instead of referencing this property from the host bridge node,
+      use the reset-gpios property from the root port node.
     maxItems: 1
+    deprecated: true
 
   wake-gpios:
-    description: GPIO controlled connection to WAKE# signal
+    description: GPIO controlled connection to WAKE# signal. This property is
+      deprecated, instead of referencing this property from the host bridge node,
+      use the property from the PCIe root port node.
     maxItems: 1
+    deprecated: true
 
   vddpe-3v3-supply:
     description: PCIe endpoint power supply
@@ -85,6 +99,20 @@ properties:
   opp-table:
     type: object
 
+patternProperties:
+  "^pcie@":
+    type: object
+    $ref: /schemas/pci/pci-pci-bridge.yaml#
+
+    properties:
+      reg:
+        maxItems: 1
+
+      phys:
+        maxItems: 1
+
+    unevaluatedProperties: false
+
 required:
   - reg
   - reg-names

Documentation/devicetree/bindings/pci/qcom,pcie-sc7280.yaml

@@ -165,9 +165,6 @@ examples:
             iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,
                         <0x100 &apps_smmu 0x1c81 0x1>;
 
-            phys = <&pcie1_phy>;
-            phy-names = "pciephy";
-
             pinctrl-names = "default";
             pinctrl-0 = <&pcie1_clkreq_n>;
 
@@ -176,7 +173,18 @@ examples:
             resets = <&gcc GCC_PCIE_1_BCR>;
             reset-names = "pci";
 
-            perst-gpios = <&tlmm 2 GPIO_ACTIVE_LOW>;
             vddpe-3v3-supply = <&pp3300_ssd>;
+            pcie1_port0: pcie@0 {
+                device_type = "pci";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+                bus-range = <0x01 0xff>;
+
+                #address-cells = <3>;
+                #size-cells = <2>;
+                ranges;
+                phys = <&pcie1_phy>;
+
+                reset-gpios = <&tlmm 2 GPIO_ACTIVE_LOW>;
+            };
         };
     };