linux-kernel - [PATCH v2 5/7] dt-bindings: timer: renesas, cmt: Update R-Car Gen3 CMT1 usage

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Date:   Tue, 20 Aug 2019 21:35:46 +0900
From:   Magnus Damm <magnus.damm@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     mark.rutland@....com, devicetree@...r.kernel.org,
        geert+renesas@...der.be, daniel.lezcano@...aro.org,
        linux-renesas-soc@...r.kernel.org, robh+dt@...nel.org,
        horms+renesas@...ge.net.au, Magnus Damm <magnus.damm@...il.com>,
        tglx@...utronix.de
Subject: [PATCH v2 5/7] dt-bindings: timer: renesas, cmt: Update R-Car Gen3 CMT1 usage

From: Magnus Damm <damm+renesas@...nsource.se>

The R-Car Gen3 SoCs so far come with a total for 4 on-chip CMT devices:
 - CMT0
 - CMT1
 - CMT2
 - CMT3

CMT0 includes two rather basic 32-bit timer channels. The rest of the on-chip
CMT devices support 48-bit counters and have 8 channels each.

Based on the data sheet information "CMT2/3 are exactly same as CMT1"
it seems that CMT2 and CMT3 now use the CMT1 compat string in the DTSI.

Clarify this in the DT binding documentation by describing R-Car Gen3 and
RZ/G2 CMT1 as "48-bit CMT devices".

Signed-off-by: Magnus Damm <damm+renesas@...nsource.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Simon Horman <horms+renesas@...ge.net.au>
---

 Changes since last version:
 - Use "devices" for fallback entry - thanks Geert!
 - Keen to Gen3 so removed out-of-scope Gen2 portions

 Documentation/devicetree/bindings/timer/renesas,cmt.txt |   20 +++++++--------
 1 file changed, 10 insertions(+), 10 deletions(-)

--- 0008/Documentation/devicetree/bindings/timer/renesas,cmt.txt
+++ work/Documentation/devicetree/bindings/timer/renesas,cmt.txt	2019-07-18 19:24:05.195643742 +0900
@@ -28,9 +28,9 @@ Required Properties:
     - "renesas,r8a77470-cmt0" for the 32-bit CMT0 device included in r8a77470.
     - "renesas,r8a77470-cmt1" for the 48-bit CMT1 device included in r8a77470.
     - "renesas,r8a774a1-cmt0" for the 32-bit CMT0 device included in r8a774a1.
-    - "renesas,r8a774a1-cmt1" for the 48-bit CMT1 device included in r8a774a1.
+    - "renesas,r8a774a1-cmt1" for the 48-bit CMT devices included in r8a774a1.
     - "renesas,r8a774c0-cmt0" for the 32-bit CMT0 device included in r8a774c0.
-    - "renesas,r8a774c0-cmt1" for the 48-bit CMT1 device included in r8a774c0.
+    - "renesas,r8a774c0-cmt1" for the 48-bit CMT devices included in r8a774c0.
     - "renesas,r8a7790-cmt0" for the 32-bit CMT0 device included in r8a7790.
     - "renesas,r8a7790-cmt1" for the 48-bit CMT1 device included in r8a7790.
     - "renesas,r8a7791-cmt0" for the 32-bit CMT0 device included in r8a7791.
@@ -42,19 +42,19 @@ Required Properties:
     - "renesas,r8a7794-cmt0" for the 32-bit CMT0 device included in r8a7794.
     - "renesas,r8a7794-cmt1" for the 48-bit CMT1 device included in r8a7794.
     - "renesas,r8a7795-cmt0" for the 32-bit CMT0 device included in r8a7795.
-    - "renesas,r8a7795-cmt1" for the 48-bit CMT1 device included in r8a7795.
+    - "renesas,r8a7795-cmt1" for the 48-bit CMT devices included in r8a7795.
     - "renesas,r8a7796-cmt0" for the 32-bit CMT0 device included in r8a7796.
-    - "renesas,r8a7796-cmt1" for the 48-bit CMT1 device included in r8a7796.
+    - "renesas,r8a7796-cmt1" for the 48-bit CMT devices included in r8a7796.
     - "renesas,r8a77965-cmt0" for the 32-bit CMT0 device included in r8a77965.
-    - "renesas,r8a77965-cmt1" for the 48-bit CMT1 device included in r8a77965.
+    - "renesas,r8a77965-cmt1" for the 48-bit CMT devices included in r8a77965.
     - "renesas,r8a77970-cmt0" for the 32-bit CMT0 device included in r8a77970.
-    - "renesas,r8a77970-cmt1" for the 48-bit CMT1 device included in r8a77970.
+    - "renesas,r8a77970-cmt1" for the 48-bit CMT devices included in r8a77970.
     - "renesas,r8a77980-cmt0" for the 32-bit CMT0 device included in r8a77980.
-    - "renesas,r8a77980-cmt1" for the 48-bit CMT1 device included in r8a77980.
+    - "renesas,r8a77980-cmt1" for the 48-bit CMT devices included in r8a77980.
     - "renesas,r8a77990-cmt0" for the 32-bit CMT0 device included in r8a77990.
-    - "renesas,r8a77990-cmt1" for the 48-bit CMT1 device included in r8a77990.
+    - "renesas,r8a77990-cmt1" for the 48-bit CMT devices included in r8a77990.
     - "renesas,r8a77995-cmt0" for the 32-bit CMT0 device included in r8a77995.
-    - "renesas,r8a77995-cmt1" for the 48-bit CMT1 device included in r8a77995.
+    - "renesas,r8a77995-cmt1" for the 48-bit CMT devices included in r8a77995.
     - "renesas,sh73a0-cmt0" for the 32-bit CMT0 device included in sh73a0.
     - "renesas,sh73a0-cmt1" for the 48-bit CMT1 device included in sh73a0.
     - "renesas,sh73a0-cmt2" for the 32-bit CMT2 device included in sh73a0.
@@ -69,7 +69,7 @@ Required Properties:
 		listed above.
     - "renesas,rcar-gen3-cmt0" for 32-bit CMT0 devices included in R-Car Gen3
 		and RZ/G2.
-    - "renesas,rcar-gen3-cmt1" for 48-bit CMT1 devices included in R-Car Gen3
+    - "renesas,rcar-gen3-cmt1" for 48-bit CMT devices included in R-Car Gen3
 		and RZ/G2.
 		These are fallbacks for R-Car Gen3 and RZ/G2 entries listed
 		above.