Document support for the Watchdog Timer (WDT) Controller in the Renesas
R-Car M3-W (r8a7796) SoC.

No driver update is needed.

Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
Acked-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
Acked-by: Rob Herring <r...@kernel.org>
---
v2:
  - Add Acked-by.

 Documentation/devicetree/bindings/watchdog/renesas-wdt.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt 
b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
index b9512f1eb80a0205..da24e31334177768 100644
--- a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
@@ -1,7 +1,11 @@
 Renesas Watchdog Timer (WDT) Controller
 
 Required properties:
-- compatible : Should be "renesas,r8a7795-wdt", or "renesas,rcar-gen3-wdt"
+- compatible : Should be "renesas,<soctype>-wdt", and
+              "renesas,rcar-gen3-wdt" as fallback.
+              Examples with soctypes are:
+                - "renesas,r8a7795-wdt" (R-Car H3)
+                - "renesas,r8a7796-wdt" (R-Car M3-W)
 
   When compatible with the generic version, nodes must list the SoC-specific
   version corresponding to the platform first, followed by the generic
-- 
1.9.1

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