dt-bindings: watchdog: renesas-wdt: Add R-Car Gen2 support

This commit documents the compatibility with R-Car Gen2 and RZ/G
devices by defining the generic compatible string "renesas,rcar-gen2-wdt".
Also, this patch expands the list of SoC-specific compatible strings to
include RZ/G and R-Car Gen2 devices.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
index fa56697..f24d802 100644 (file)
--- a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
@@ -1,19 +1,27 @@
 Renesas Watchdog Timer (WDT) Controller
 
 Required properties:
-- compatible : Should be "renesas,<soctype>-wdt", and
-              "renesas,rcar-gen3-wdt" or "renesas,rza-wdt" as fallback.
+ - compatible : Must be "renesas,<soctype>-wdt", followed by a generic
+               fallback compatible string when compatible with the generic
+               version.
               Examples with soctypes are:
-                - "renesas,r7s72100-wdt" (RZ/A1)
+                - "renesas,r8a7743-wdt" (RZ/G1M)
+                - "renesas,r8a7745-wdt" (RZ/G1E)
+                - "renesas,r8a7790-wdt" (R-Car H2)
+                - "renesas,r8a7791-wdt" (R-Car M2-W)
+                - "renesas,r8a7792-wdt" (R-Car V2H)
+                - "renesas,r8a7793-wdt" (R-Car M2-N)
+                - "renesas,r8a7794-wdt" (R-Car E2)
                 - "renesas,r8a7795-wdt" (R-Car H3)
                 - "renesas,r8a7796-wdt" (R-Car M3-W)
                 - "renesas,r8a77965-wdt" (R-Car M3-N)
                 - "renesas,r8a77970-wdt" (R-Car V3M)
                 - "renesas,r8a77995-wdt" (R-Car D3)
-
-  When compatible with the generic version, nodes must list the SoC-specific
-  version corresponding to the platform first, followed by the generic
-  version.
+                - "renesas,r7s72100-wdt" (RZ/A1)
+               The generic compatible string must be:
+                - "renesas,rza-wdt" for RZ/A
+                - "renesas,rcar-gen2-wdt" for R-Car Gen2 and RZ/G
+                - "renesas,rcar-gen3-wdt" for R-Car Gen3
 
 - reg : Should contain WDT registers location and length
 - clocks : the clock feeding the watchdog timer.