[PATCH v2 2/3] dt-bindings: imx6q-pcie: Handle various PD configurations

[Marek Vasut]

The i.MX SoCs have various power domain configurations routed into
the PCIe IP. MX6SX is the only one which contains 2 domains and also
uses power-domain-names. MX6QDL do not use any domains. All the rest
uses one domain and does not use power-domain-names anymore.

Document all those configurations in the DT binding document.

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
Cc: Lucas Stach <l.stach at pengutronix.de>
Cc: Richard Zhu <hongxing.zhu at nxp.com>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: NXP Linux Team <linux-imx at nxp.com>
To: devicetree at vger.kernel.org
---
V2: - Keep the power-domains description in the main section
---
 .../bindings/pci/fsl,imx6q-pcie.yaml          | 55 ++++++++++++++-----
 1 file changed, 42 insertions(+), 13 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
index 1cfea8ca72576..2087dab95d679 100644
--- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
@@ -68,19 +68,6 @@ properties:
     description: A phandle to an fsl,imx7d-pcie-phy node. Additional
       required properties for imx7d-pcie and imx8mq-pcie.
 
-  power-domains:
-    items:
-      - description: The phandle pointing to the DISPLAY domain for
-          imx6sx-pcie, to PCIE_PHY power domain for imx7d-pcie and
-          imx8mq-pcie.
-      - description: The phandle pointing to the PCIE_PHY power domains
-          for imx6sx-pcie.
-
-  power-domain-names:
-    items:
-      - const: pcie
-      - const: pcie_phy
-
   resets:
     maxItems: 3
     description: Phandles to PCIe-related reset lines exposed by SRC
@@ -132,6 +119,19 @@ properties:
   phy-names:
     const: pcie-phy
 
+  power-domains:
+    minItems: 1
+    items:
+      - description: The phandle pointing to the DISPLAY domain for
+          imx6sx-pcie, to PCIE_PHY power domain for imx7d-pcie and
+          imx8mq-pcie.
+      - description: The phandle pointing to the PCIE_PHY power domains
+          for imx6sx-pcie.
+  power-domain-names:
+    items:
+      - const: pcie
+      - const: pcie_phy
+
   reset-gpio:
     description: Should specify the GPIO for controlling the PCI bus device
       reset signal. It's not polarity aware and defaults to active-low reset
@@ -241,6 +241,35 @@ allOf:
                 - const: pcie_bus
                 - const: pcie_phy
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx6sx-pcie
+    then:
+      properties:
+        power-domains:
+          minItems: 2
+          maxItems: 2
+        power-domain-names:
+          minItems: 2
+          maxItems: 2
+    else:
+      if:
+        not:
+          properties:
+            compatible:
+              contains:
+                enum:
+                  - fsl,imx6q-pcie
+                  - fsl,imx6qp-pcie
+      then:
+        properties:
+          power-domains:
+            minItems: 1
+            maxItems: 1
+          power-domain-names: false
+
 examples:
   - |
     #include <dt-bindings/clock/imx6qdl-clock.h>
-- 
2.35.1