[PATCH v3 1/4] dt-bindings: clock: renesas,cpg-clocks: Document ZT/ZTR trace clock on R-Mobile A1

[Marek Vasut]

Document ZT trace bus and ZTR trace clock on the R-Mobile A1.
These clock supply the coresight tracing modules, PTM, TPIU,
ETB and replicator. Without these clock, the coresight tracing
can not be operated. While this does change the ABI, it does so
by extending the existing clock-output-names, therefore if an
old software is used with new DT, the coresight tracing parts
will likely fail to probe, otherwise if new software is used
with an old DT, there is no impact.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxxxxx>
Signed-off-by: Marek Vasut <marek.vasut+renesas@xxxxxxxxxxx>
---
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
Cc: Magnus Damm <magnus.damm@xxxxxxxxx>
Cc: Michael Turquette <mturquette@xxxxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-clk@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-renesas-soc@xxxxxxxxxxxxxxx
---
V2: Reorder new clock at the end to match bindings
V3: - Clarify why this change has to be done and its impact
    - Include include/dt-bindings/clock/r8a7740-clock.h change here
    - Add RB from Krzysztof
---
 .../devicetree/bindings/clock/renesas,cpg-clocks.yaml       | 6 ++++--
 include/dt-bindings/clock/r8a7740-clock.h                   | 2 ++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/renesas,cpg-clocks.yaml b/Documentation/devicetree/bindings/clock/renesas,cpg-clocks.yaml
index a0e09b7002f07..925ed35d6658a 100644
--- a/Documentation/devicetree/bindings/clock/renesas,cpg-clocks.yaml
+++ b/Documentation/devicetree/bindings/clock/renesas,cpg-clocks.yaml
@@ -41,7 +41,7 @@ properties:
 
   clock-output-names:
     minItems: 3
-    maxItems: 17
+    maxItems: 19
 
   renesas,mode:
     description: Board-specific settings of the MD_CK* bits on R-Mobile A1
@@ -123,6 +123,8 @@ allOf:
             - const: zb
             - const: m3
             - const: cp
+            - const: ztr
+            - const: zt
 
       required:
         - renesas,mode
@@ -240,6 +242,6 @@ examples:
             #clock-cells = <1>;
             clock-output-names = "system", "pllc0", "pllc1", "pllc2", "r",
                                  "usb24s", "i", "zg", "b", "m1", "hp", "hpp",
-                                 "usbp", "s", "zb", "m3", "cp";
+                                 "usbp", "s", "zb", "m3", "cp", "ztr", "zt";
             renesas,mode = <0x05>;
     };
diff --git a/include/dt-bindings/clock/r8a7740-clock.h b/include/dt-bindings/clock/r8a7740-clock.h
index 1b3fdb39cc426..8a8816b2ff6ac 100644
--- a/include/dt-bindings/clock/r8a7740-clock.h
+++ b/include/dt-bindings/clock/r8a7740-clock.h
@@ -24,6 +24,8 @@
 #define R8A7740_CLK_ZB		14
 #define R8A7740_CLK_M3		15
 #define R8A7740_CLK_CP		16
+#define R8A7740_CLK_ZTR		17
+#define R8A7740_CLK_ZT		18
 
 /* MSTP1 */
 #define R8A7740_CLK_CEU21	28
-- 
2.53.0