[PATCH v2] dt-bindings: soc: ti: pruss: Add documentation for PA_STATS support

[MD Danish Anwar <danishanwar@ti.com>]

Add documentation for pa-stats node which is syscon regmap for
PA_STATS registers. This will be used to dump statistics maintained by
ICSSG firmware.

Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
---
Changes from v1 to v2:
*) Added ^ in pa-stats as suggested by Krzysztof Kozlowski
   <krzk@kernel.org>
*) Moved additionalProperties: false to right after after type:object as
   suggested by Krzysztof Kozlowski <krzk@kernel.org>
*) Updated description of pa-stats to explain the purpose of PA_STATS
   module in context of ICSSG.

v1 https://lore.kernel.org/all/20240430121915.1561359-1-danishanwar@ti.com/

 .../devicetree/bindings/soc/ti/ti,pruss.yaml  | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml b/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
index c402cb2928e8..3cb1471cc6b6 100644
--- a/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
+++ b/Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
@@ -278,6 +278,26 @@ patternProperties:
 
     additionalProperties: false
 
+  ^pa-stats@[a-f0-9]+$:
+    description: |
+      PA-STATS sub-module represented as a SysCon. PA_STATS is a set of
+      registers where different statistics related to ICSSG, are dumped by
+      ICSSG firmware. This syscon sub-module will help the device to
+      access/read/write those statistics.
+
+    type: object
+
+    additionalProperties: false
+
+    properties:
+      compatible:
+        items:
+          - const: ti,pruss-pa-st
+          - const: syscon
+
+      reg:
+        maxItems: 1
+
   interrupt-controller@[a-f0-9]+$:
     description: |
       PRUSS INTC Node. Each PRUSS has a single interrupt controller instance
-- 
2.34.1