The Renesas RZ/V2H RTC IP is based on the same RTCA3 IP as RZ/G3S
(r9a08g045), with the following differences:
- It lacks the time capture functionality
- The maximum supported periodic interrupt frequency is 128Hz instead
  of 256Hz
- It requires two reset lines instead of one

Add new compatible string "renesas,r9a09g057-rtca3" for RZ/V2H and update
the binding accordingly:
- Allow "resets" to contain one or two entries depending on the SoC.
- Add "reset-names" property, but make it required only for RZ/V2H.

Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
---
 .../bindings/rtc/renesas,rz-rtca3.yaml        | 45 ++++++++++++++++---
 1 file changed, 40 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/renesas,rz-rtca3.yaml b/Documentation/devicetree/bindings/rtc/renesas,rz-rtca3.yaml
index e70eeb66aa64..2569cb494481 100644
--- a/Documentation/devicetree/bindings/rtc/renesas,rz-rtca3.yaml
+++ b/Documentation/devicetree/bindings/rtc/renesas,rz-rtca3.yaml
@@ -9,14 +9,12 @@ title: Renesas RTCA-3 Real Time Clock
 maintainers:
   - Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
 
-allOf:
-  - $ref: rtc.yaml#
-
 properties:
   compatible:
     items:
       - enum:
           - renesas,r9a08g045-rtca3 # RZ/G3S
+          - renesas,r9a09g057-rtca3 # RZ/V2H
       - const: renesas,rz-rtca3
 
   reg:
@@ -48,8 +46,12 @@ properties:
     maxItems: 1
 
   resets:
-    items:
-      - description: VBATTB module reset
+    minItems: 1
+    maxItems: 2
+
+  reset-names:
+    minItems: 1
+    maxItems: 2
 
 required:
   - compatible
@@ -61,6 +63,39 @@ required:
   - power-domains
   - resets
 
+allOf:
+  - $ref: rtc.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a08g045-rtca3
+    then:
+      properties:
+        resets:
+          items:
+            - description: VBATTB module reset
+        reset-names:
+          const: vbattb
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g057-rtca3
+    then:
+      properties:
+        resets:
+          items:
+            - description: RTC reset
+            - description: Reset for the RTEST registers
+        reset-names:
+          items:
+            - const: rtc
+            - const: rtc_rtest
+      required:
+        - reset-names
+
 additionalProperties: false
 
 examples:
-- 
2.51.0

On Mon, Nov 03, 2025 at 12:18:45PM +0000, Ovidiu Panait wrote:
> The Renesas RZ/V2H RTC IP is based on the same RTCA3 IP as RZ/G3S
> (r9a08g045), with the following differences:
> - It lacks the time capture functionality
> - The maximum supported periodic interrupt frequency is 128Hz instead
>   of 256Hz
> - It requires two reset lines instead of one
> 
> Add new compatible string "renesas,r9a09g057-rtca3" for RZ/V2H and update
> the binding accordingly:
> - Allow "resets" to contain one or two entries depending on the SoC.
> - Add "reset-names" property, but make it required only for RZ/V2H.
> 
> Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
> +        reset-names:
> +          items:
> +            - const: rtc
> +            - const: rtc_rtest

If you respin, just make this second one rtest.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

On 04/11/2025 17:28:27+0000, Conor Dooley wrote:
> On Mon, Nov 03, 2025 at 12:18:45PM +0000, Ovidiu Panait wrote:
> > The Renesas RZ/V2H RTC IP is based on the same RTCA3 IP as RZ/G3S
> > (r9a08g045), with the following differences:
> > - It lacks the time capture functionality
> > - The maximum supported periodic interrupt frequency is 128Hz instead
> >   of 256Hz
> > - It requires two reset lines instead of one
> > 
> > Add new compatible string "renesas,r9a09g057-rtca3" for RZ/V2H and update
> > the binding accordingly:
> > - Allow "resets" to contain one or two entries depending on the SoC.
> > - Add "reset-names" property, but make it required only for RZ/V2H.
> > 
> > Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
> > +        reset-names:
> > +          items:
> > +            - const: rtc
> > +            - const: rtc_rtest
> 
> If you respin, just make this second one rtest.

I already applied it as it had your ack but I can still change it

> 
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> pw-bot: not-applicable



-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

On Tue, Nov 04, 2025 at 09:20:49PM +0100, Alexandre Belloni wrote:
> On 04/11/2025 17:28:27+0000, Conor Dooley wrote:
> > On Mon, Nov 03, 2025 at 12:18:45PM +0000, Ovidiu Panait wrote:
> > > The Renesas RZ/V2H RTC IP is based on the same RTCA3 IP as RZ/G3S
> > > (r9a08g045), with the following differences:
> > > - It lacks the time capture functionality
> > > - The maximum supported periodic interrupt frequency is 128Hz instead
> > >   of 256Hz
> > > - It requires two reset lines instead of one
> > > 
> > > Add new compatible string "renesas,r9a09g057-rtca3" for RZ/V2H and update
> > > the binding accordingly:
> > > - Allow "resets" to contain one or two entries depending on the SoC.
> > > - Add "reset-names" property, but make it required only for RZ/V2H.
> > > 
> > > Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
> > > +        reset-names:
> > > +          items:
> > > +            - const: rtc
> > > +            - const: rtc_rtest
> > 
> > If you respin, just make this second one rtest.
> 
> I already applied it as it had your ack but I can still change it

It's fine.