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Message-ID: <20251027154615.115759-4-biju.das.jz@bp.renesas.com>
Date: Mon, 27 Oct 2025 15:45:50 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jirislaby@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Magnus Damm <magnus.damm@...il.com>
Cc: Biju Das <biju.das.jz@...renesas.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
linux-kernel@...r.kernel.org,
linux-serial@...r.kernel.org,
devicetree@...r.kernel.org,
linux-renesas-soc@...r.kernel.org,
Biju Das <biju.das.au@...il.com>
Subject: [PATCH 03/19] dt-bindings: serial: renesas,rsci: Document RZ/G3E support
Add documentation for the serial communication interface (RSCI) found on
the Renesas RZ/G3E (R9A09G047) SoC. The RSCI IP on this SoC is identical
to that on the RZ/T2H (R9A09G077) SoC, but it has a 32-stage FIFO compared
to 16 on RZ/T2H. It supports both FIFO and non-FIFO mode operation. RZ/G3E
has 6 clocks compared to 3 on RZ/T2H, and it has multiple resets.
Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
.../bindings/serial/renesas,rsci.yaml | 82 ++++++++++++++++---
1 file changed, 71 insertions(+), 11 deletions(-)
diff --git a/Documentation/devicetree/bindings/serial/renesas,rsci.yaml b/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
index 6b1f827a335b..7cf6348e2b5b 100644
--- a/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,rsci.yaml
@@ -10,17 +10,16 @@ maintainers:
- Geert Uytterhoeven <geert+renesas@...der.be>
- Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
-allOf:
- - $ref: serial.yaml#
-
properties:
compatible:
oneOf:
- - items:
- - const: renesas,r9a09g087-rsci # RZ/N2H
- - const: renesas,r9a09g077-rsci # RZ/T2H
+ - enum:
+ - renesas,r9a09g047-rsci # RZ/G3E non FIFO mode
+ - renesas,r9a09g047-rscif # RZ/G3E FIFO mode
+ - renesas,r9a09g077-rsci # RZ/T2H
- items:
+ - const: renesas,r9a09g087-rsci # RZ/N2H
- const: renesas,r9a09g077-rsci # RZ/T2H
reg:
@@ -42,14 +41,40 @@ properties:
clocks:
minItems: 2
- maxItems: 3
+ maxItems: 6
clock-names:
- minItems: 2
+ oneOf:
+ - items:
+ - const: operation
+ - const: bus
+ - items:
+ - const: operation
+ - const: bus
+ - const: sck # optional external clock input
+ - items:
+ - const: bus
+ - const: tclk
+ - const: tclk_div64
+ - const: tclk_div16
+ - const: tclk_div4
+ - items:
+ - const: bus
+ - const: tclk
+ - const: tclk_div64
+ - const: tclk_div16
+ - const: tclk_div4
+ - const: sck # optional external clock input
+
+ resets:
+ items:
+ - description: Input for resetting the APB clock
+ - description: Input for resetting TCLK
+
+ reset-names:
items:
- - const: operation
- - const: bus
- - const: sck # optional external clock input
+ - const: presetn
+ - const: tresetn
power-domains:
maxItems: 1
@@ -62,6 +87,41 @@ required:
- clock-names
- power-domains
+allOf:
+ - $ref: serial.yaml#
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: renesas,r9a09g077-rsci
+ then:
+ properties:
+ clocks:
+ maxItems: 3
+
+ clock-names:
+ maxItems: 3
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - renesas,r9a09g047-rsci
+ - renesas,r9a09g047-rscif
+ then:
+ properties:
+ clocks:
+ minItems: 5
+
+ clock-names:
+ minItems: 5
+
+ required:
+ - resets
+ - reset-names
+
unevaluatedProperties: false
examples:
--
2.43.0
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