[PATCH 1/2] dt-bindings: gpio: Add eio gpio node to gpio-zynq

[Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>]

Add the EIO gpio node to the device tree.
The EIO GPIO block exposes only bank 0 and bank 1 to
multiplexed I/O pins, providing a fixed total of 52 GPIO lines
(2 banks × 26 pins). Enforce this hardware constraint by requiring
exactly 52 entries in gpio-line-names for the EIO variant.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>
---

 .../devicetree/bindings/gpio/gpio-zynq.yaml        | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-zynq.yaml b/Documentation/devicetree/bindings/gpio/gpio-zynq.yaml
index 5e2496379a3c..b8dd279753a5 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-zynq.yaml
+++ b/Documentation/devicetree/bindings/gpio/gpio-zynq.yaml
@@ -16,6 +16,7 @@ properties:
       - xlnx,zynqmp-gpio-1.0
       - xlnx,versal-gpio-1.0
       - xlnx,pmc-gpio-1.0
+      - xlnx,eio-gpio-1.0
 
   reg:
     maxItems: 1
@@ -30,7 +31,7 @@ properties:
 
   gpio-line-names:
     description: strings describing the names of each gpio line
-    minItems: 58
+    minItems: 52
     maxItems: 174
 
   interrupt-controller: true
@@ -89,6 +90,17 @@ allOf:
           minItems: 116
           maxItems: 116
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - xlnx,eio-gpio-1.0
+    then:
+      properties:
+        gpio-line-names:
+          minItems: 52
+          maxItems: 52
+
 required:
   - compatible
   - reg
-- 
2.34.1