dt-bindings: leds: is31fl319x: Document variants specificities

Add si-en compatibles for all chip variants and add conditionals
depending on compatibles to document variants specs:
- possible reg addresses
- whether audio-gain-db is supported or not
- maximum number of leds
- led-max-microamp values

Reviewed-by: Rob Herring <[e-mail]>
Signed-off-by: Vincent Knecht <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/devicetree/bindings/leds/issi,is31fl319x.yaml

···
       - issi,is31fl3193
       - issi,is31fl3196
       - issi,is31fl3199
+      - si-en,sn3190
+      - si-en,sn3191
+      - si-en,sn3193
+      - si-en,sn3196
       - si-en,sn3199
 
   reg:
···
         maximum: 9
 
       led-max-microamp:
-        default: 20000
-        enum: [5000, 10000, 15000, 20000, 25000, 30000, 35000, 40000]
         description:
           Note that a driver will take the lowest of all LED limits
           since the chip has a single global setting. The lowest value
···
           brightness is achieved by reducing the duty-cycle of pulses
           and not the current, which will always have its peak value
           equal to led-max-microamp.
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - issi,is31fl3190
+              - issi,is31fl3191
+              - issi,is31fl3193
+              - si-en,sn3190
+              - si-en,sn3191
+              - si-en,sn3193
+    then:
+      properties:
+        reg:
+          enum: [0x68, 0x69, 0x6a, 0x6b]
+
+        audio-gain-db: false
+
+      patternProperties:
+        "^led@[1-9]$":
+          properties:
+            led-max-microamp:
+              default: 42000
+              enum: [5000, 10000, 17500, 30000, 42000]
+    else:
+      properties:
+        reg:
+          enum: [0x64, 0x65, 0x66, 0x67]
+
+      patternProperties:
+        "^led@[1-9]$":
+          properties:
+            led-max-microamp:
+              default: 20000
+              enum: [5000, 10000, 15000, 20000, 25000, 30000, 35000, 40000]
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - issi,is31fl3190
+              - issi,is31fl3191
+              - si-en,sn3190
+              - si-en,sn3191
+    then:
+      patternProperties:
+        "^led@[1-9]$":
+          properties:
+            reg:
+              maximum: 1
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - issi,is31fl3193
+              - si-en,sn3193
+    then:
+      patternProperties:
+        "^led@[1-9]$":
+          properties:
+            reg:
+              maximum: 3
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - issi,is31fl3196
+              - si-en,sn3196
+    then:
+      patternProperties:
+        "^led@[1-9]$":
+          properties:
+            reg:
+              maximum: 6
 
 required:
   - compatible