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[1/6] dt-bindings: clock: rzv2h-cpg: Add syscon compatible for CPG block

Message ID 20241218003414.490498-2-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State New
Delegated to: Geert Uytterhoeven
Headers show
Series Add support to retrieve the bootstatus from watchdog for RZ/V2H(P) SoC | expand

Commit Message

Prabhakar Dec. 18, 2024, 12:34 a.m. UTC 
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

The CPG block in the RZ/V2H(P) and RZ/G3E SoCs includes Error Reset
Registers (CPG_ERROR_RSTm). A system reset is triggered in response to
error interrupt factors, and the corresponding bit is set in the
CPG_ERROR_RSTm register. These registers can be utilized by various IP
blocks as needed.

For example, specific bits in these registers indicate resets caused by
events such as underflow or overflow of the watchdog timer. This
functionality allows the watchdog driver to determine whether the current
boot resulted from a `Power-on Reset` or a `Watchdog Reset`.

Add the syscon-compatible property to the RZ/V2H(P) and RZ/G3E CPG block,
allowing drivers to interact with the CPG_ERROR_RSTm registers as required.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 .../devicetree/bindings/clock/renesas,rzv2h-cpg.yaml   | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml b/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml
index c3fe76abd549..f42d79e73e70 100644
--- a/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml
+++ b/Documentation/devicetree/bindings/clock/renesas,rzv2h-cpg.yaml
@@ -17,9 +17,11 @@  description:
 
 properties:
   compatible:
-    enum:
-      - renesas,r9a09g047-cpg # RZ/G3E
-      - renesas,r9a09g057-cpg # RZ/V2H
+    items:
+      - enum:
+          - renesas,r9a09g047-cpg # RZ/G3E
+          - renesas,r9a09g057-cpg # RZ/V2H
+      - const: syscon
 
   reg:
     maxItems: 1
@@ -73,7 +75,7 @@  additionalProperties: false
 examples:
   - |
     clock-controller@10420000 {
-        compatible = "renesas,r9a09g057-cpg";
+        compatible = "renesas,r9a09g057-cpg", "syscon";
         reg = <0x10420000 0x10000>;
         clocks = <&audio_extal_clk>, <&rtxin_clk>, <&qextal_clk>;
         clock-names = "audio_extal", "rtxin", "qextal";