linux-kernel - [PATCH 1/2] dt-bindings: serial: samsung: add DMA properties

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Message-Id: <20210212163905.70171-1-krzk@kernel.org>
Date:   Fri, 12 Feb 2021 17:39:04 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] dt-bindings: serial: samsung: add DMA properties

The Samsung SoC UART nodes have usually DMA so dtschema has to reflect
this to fix dtbs_check warnings like:

  arch/arm/boot/dts/exynos4210-smdkv310.dt.yaml: serial@...00000:
    'dma-names', 'dmas' do not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
---
 .../devicetree/bindings/serial/samsung_uart.yaml       | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.yaml b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
index 21ee627b2ced..3e29b561223d 100644
--- a/Documentation/devicetree/bindings/serial/samsung_uart.yaml
+++ b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
@@ -51,6 +51,16 @@ properties:
       - pattern: '^clk_uart_baud[0-3]$'
       - pattern: '^clk_uart_baud[0-3]$'
 
+  dmas:
+    items:
+      - description: DMA controller phandle and request line for RX
+      - description: DMA controller phandle and request line for TX
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
   interrupts:
     description: RX interrupt and optionally TX interrupt.
     minItems: 1
-- 
2.25.1