[PATCH v3 7/7] dt-bindings: PCI: intel,lgm-pcie: Add atu resource

[Florian Eckert]

The 'atu' information is already set in the dwc core, if it is specified
in the devicetree. The driver uses its own default, if not set in the
devicetree. This information is hardware specific and should therefore be
maintained in the devicetree rather than in the source.

To be backward compatibile, this field is not mandatory. If 'atu'
resource is not specified in the devicetree, the driver’s default value
is used.

Old DTS entry for PCIe:

reg = <0xd1000000 0x1000>,
      <0xd3000000 0x20000>,
      <0xd0c41000.0x1000>;
reg-names = "dbi", "config", "app";

New DTS entry for PCIe:

reg = <0xd1000000 0x1000>,
      <0xd10c0000 0x1000>,
      <0xd3000000 0x20000>,
     <0xd0c41000.0x1000>;
reg-names = "dbi", "atu", "config", "app";

Signed-off-by: Florian Eckert <fe@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml b/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
index 54e2890ae6314ac6847fc23f49440d05d66d87d4..a7cb2b66b382a55d88211890aee068f25f05f61b 100644
--- a/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
@@ -27,16 +27,19 @@ properties:
       - const: snps,dw-pcie
 
   reg:
+    minItems: 3
     items:
       - description: Controller control and status registers.
       - description: PCIe configuration registers.
       - description: Controller application registers.
+      - description: Internal Address Translation Unit (iATU) registers.
 
   reg-names:
     items:
       - const: dbi
       - const: config
       - const: app
+      - const: atu
 
   ranges:
     maxItems: 1
@@ -94,9 +97,10 @@ examples:
       #address-cells = <3>;
       #size-cells = <2>;
       reg = <0xd0e00000 0x1000>,
+            <0xd0ec0000 0x1000>,
             <0xd2000000 0x800000>,
             <0xd0a41000 0x1000>;
-      reg-names = "dbi", "config", "app";
+      reg-names = "dbi", "atu", "config", "app";
       linux,pci-domain = <0>;
       max-link-speed = <4>;
       bus-range = <0x00 0x08>;

-- 
2.47.3