Merge branch 'pci/controller/imx6'

- Add DT compatible string 'fsl,imx8q-pcie-ep' and driver support for
  i.MX8Q series (i.MX8QM, i.MX8QXP, and i.MX8DXL) Endpoints (Frank Li)

- Add DT binding for optional i.MX95 Refclk and driver support to enable it
  if the platform hasn't enabled it (Richard Zhu)

- Configure PHY based on controller being in Root Complex or Endpoint mode
  (Frank Li)

- Rely on dbi2 and iATU base addresses from DT via dw_pcie_get_resources()
  instead of hardcoding them in imx6 (Richard Zhu)

- Skip controller_id computation for i.MX7D since it only has one
  controller (Richard Zhu)

- Deassert apps_reset in imx_pcie_deassert_core_reset() since it is
  asserted in imx_pcie_assert_core_reset() (Richard Zhu)

- Add missing reference clock enable or disable logic for IMX6SX, IMX7D,
  IMX8MM (Richard Zhu)

- Remove redundant imx7d_pcie_init_phy() since imx7d_pcie_enable_ref_clk()
  does the same thing (Richard Zhu)

* pci/controller/imx6:
  PCI: imx6: Clean up comments and whitespace
  PCI: imx6: Remove surplus imx7d_pcie_init_phy() function
  PCI: imx6: Add missing reference clock disable logic
  PCI: imx6: Deassert apps_reset in imx_pcie_deassert_core_reset()
  PCI: imx6: Skip controller_id generation logic for i.MX7D
  PCI: imx6: Fetch dbi2 and iATU base addesses from DT
  PCI: imx6: Configure PHY based on Root Complex or Endpoint mode
  PCI: imx6: Add Refclk for i.MX95 PCIe
  dt-bindings: PCI: fsl,imx6q-pcie: Add Refclk for i.MX95 RC
  PCI: imx6: Add i.MX8Q PCIe Endpoint (EP) support
  dt-bindings: PCI: fsl,imx6q-pcie-ep: Add compatible string fsl,imx8q-pcie-ep

# Conflicts:
#	drivers/pci/controller/dwc/pci-imx6.c

Author: bjorn-helgaas

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml

@@ -17,11 +17,11 @@ description:
 properties:
   clocks:
     minItems: 3
-    maxItems: 4
+    maxItems: 5
 
   clock-names:
     minItems: 3
-    maxItems: 4
+    maxItems: 5
 
   num-lanes:
     const: 1

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml

@@ -22,6 +22,7 @@ properties:
       - fsl,imx8mm-pcie-ep
       - fsl,imx8mq-pcie-ep
       - fsl,imx8mp-pcie-ep
+      - fsl,imx8q-pcie-ep
       - fsl,imx95-pcie-ep
 
   clocks:
@@ -74,6 +75,20 @@ allOf:
             - const: dbi2
             - const: atu
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - fsl,imx8q-pcie-ep
+    then:
+      properties:
+        reg:
+          maxItems: 2
+        reg-names:
+          items:
+            - const: dbi
+            - const: addr_space
+
   - if:
       properties:
         compatible:
@@ -103,13 +118,21 @@ allOf:
       properties:
         clocks:
           minItems: 4
+          maxItems: 4
         clock-names:
           items:
             - const: pcie
             - const: pcie_bus
             - const: pcie_phy
             - const: pcie_aux
-    else:
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - fsl,imx8mm-pcie-ep
+            - fsl,imx8mp-pcie-ep
+    then:
       properties:
         clocks:
           maxItems: 3
@@ -119,6 +142,20 @@ allOf:
             - const: pcie_bus
             - const: pcie_aux
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - fsl,imxq-pcie-ep
+    then:
+      properties:
+        clocks:
+          maxItems: 3
+        clock-names:
+          items:
+            - const: dbi
+            - const: mstr
+            - const: slv
 
 unevaluatedProperties: false
 

Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml

@@ -40,10 +40,11 @@ properties:
       - description: PCIe PHY clock.
       - description: Additional required clock entry for imx6sx-pcie,
            imx6sx-pcie-ep, imx8mq-pcie, imx8mq-pcie-ep.
+      - description: PCIe reference clock.
 
   clock-names:
     minItems: 3
-    maxItems: 4
+    maxItems: 5
 
   interrupts:
     items:
@@ -127,7 +128,7 @@ allOf:
     then:
       properties:
         clocks:
-          minItems: 4
+          maxItems: 4
         clock-names:
           items:
             - const: pcie
@@ -140,11 +141,10 @@ allOf:
         compatible:
           enum:
             - fsl,imx8mq-pcie
-            - fsl,imx95-pcie
     then:
       properties:
         clocks:
-          minItems: 4
+          maxItems: 4
         clock-names:
           items:
             - const: pcie
@@ -200,6 +200,23 @@ allOf:
             - const: mstr
             - const: slv
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - fsl,imx95-pcie
+    then:
+      properties:
+        clocks:
+          maxItems: 5
+        clock-names:
+          items:
+            - const: pcie
+            - const: pcie_bus
+            - const: pcie_phy
+            - const: pcie_aux
+            - const: ref
+
 unevaluatedProperties: false
 
 examples: