linux-kernel - [PATCH v1] dt-bindings: serial: snps-dw-apb-uart: add dma & dma-names properties

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Date:   Wed,  8 Feb 2023 17:17:16 +0000
From:   Conor Dooley <conor@...nel.org>
To:     robh+dt@...nel.org, gregkh@...uxfoundation.org
Cc:     conor@...nel.org, Conor Dooley <conor.dooley@...rochip.com>,
        krzysztof.kozlowski+dt@...aro.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1] dt-bindings: serial: snps-dw-apb-uart: add dma & dma-names properties

From: Conor Dooley <conor.dooley@...rochip.com>

Commit 0c559bc8abfb ("dt-bindings: serial: restrict possible child node
names") exposed the Allwinner D1 devicetrees as users of unevaluated
properties, with a slew of similar warnings now appearing during
dtbs_check:
sun20i-d1-nezha.dtb: serial@...0400: Unevaluated properties are not allowed ('dma-names', 'dmas' were unexpected)

Document the missing properties.

Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
The commit exposing it is in Rob's tree, but I figure this can go either
way as it has no dependancy.
---
 .../devicetree/bindings/serial/snps-dw-apb-uart.yaml      | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index b9c2287c5d1e..2becdfab4f15 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -67,6 +67,14 @@ properties:
       - const: baudclk
       - const: apb_pclk
 
+  dmas:
+    minItems: 2
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
   snps,uart-16550-compatible:
     description: reflects the value of UART_16550_COMPATIBLE configuration
       parameter. Define this if your UART does not implement the busy functionality.
-- 
2.39.1