dts/bindings: interrupt-controller: stm32: Add line properties

Add 2 properties in STM32 external interrupt controller:
- num-lines
- line-ranges

Additionally, make interrupt-names a required property.

The properties will help to simplify exti init code in building the
exti_irq_table and simplify the isr related bits.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

dts/bindings/interrupt-controller/st,stm32-exti.yaml

@@ -2,8 +2,35 @@ description: STMicroelectronics STM32 family External Interrupt Controller
 
 compatible: "st,stm32-exti"
 
-include: base.yaml
+include: [base.yaml, interrupt-controller.yaml]
 
 properties:
   reg:
     required: true
+
+  interrupts:
+    required: true
+
+  interrupt-names:
+    required: true
+
+  num-lines:
+    type: int
+    required: true
+    description: Number of lines supported by the interrupt controller.
+
+  line-ranges:
+    type: array
+    required: true
+    description: |
+      Description of the the input lines range for each interrupt line supported
+      by the external interrupt controller. For each line a couple of integers is
+      provided: the number of the first line of the range start and the length
+      of the range.
+      As example:
+             line-ranges = <0 1>, <1 1>, <2 1>, <3 1>,
+                           <4 1>, <5 5>, <10 6>;
+      Above property provides event-range for 7 lines.
+      5 first lines contain one element
+      6th line starts with input line 5 and contains 5 elements (5 to 9)
+      7th line starts with inupt line 10 and contains 6 elements (10 to 15)