[PATCH/RFC 1/4] dt-bindings: i2c: renesas,riic: Add interrupt-names

[Geert Uytterhoeven <geert+renesas@glider.be>]

The Renesas RZ/A and RZ/G2L I2C Bus Interface has no less than 8
interrupts.  Hence document the "interrupt-names" property, to make it
easier to review the interrupt mappings in DTS files.

Note that this property cannot be made required yet, as the RIIC nodes
in all DTS files lack the property.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 .../devicetree/bindings/i2c/renesas,riic.yaml | 29 ++++++++++++++-----
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/renesas,riic.yaml b/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
index 52d92ec7ec0b2112..70f998f006305c25 100644
--- a/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
+++ b/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
@@ -27,14 +27,25 @@ properties:
 
   interrupts:
     items:
-      - description: Transmit End Interrupt (TEI)
-      - description: Receive Data Full Interrupt (RI)
-      - description: Transmit Data Empty Interrupt (TI)
-      - description: Stop Condition Detection Interrupt (SPI)
-      - description: Start Condition Detection Interrupt (STI)
-      - description: NACK Reception Interrupt (NAKI)
-      - description: Arbitration-Lost Interrupt (ALI)
-      - description: Timeout Interrupt (TMOI)
+      - description: Transmit End Interrupt
+      - description: Receive Data Full Interrupt
+      - description: Transmit Data Empty Interrupt
+      - description: Stop Condition Detection Interrupt
+      - description: Start Condition Detection Interrupt
+      - description: NACK Reception Interrupt
+      - description: Arbitration-Lost Interrupt
+      - description: Timeout Interrupt
+
+  interrupt-names:
+    items:
+      - const: tei
+      - const: ri
+      - const: ti
+      - const: spi
+      - const: sti
+      - const: naki
+      - const: ali
+      - const: tmoi
 
   clock-frequency:
     description:
@@ -85,6 +96,8 @@ examples:
                          <GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>,
                          <GIC_SPI 163 IRQ_TYPE_LEVEL_HIGH>,
                          <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "tei", "ri", "ti", "spi", "sti", "naki", "ali",
+                              "tmoi";
             clocks = <&mstp9_clks R7S72100_CLK_I2C0>;
             clock-frequency = <100000>;
             power-domains = <&cpg_clocks>;
-- 
2.25.1