linux-kernel - [PATCH 1/2] dt-bindings: serial: add generic DT binding for announcing RTS/CTS lines

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Message-ID: <20200520133932.30441-2-erwan.leray@st.com>
Date:   Wed, 20 May 2020 15:39:31 +0200
From:   Erwan Le Ray <erwan.leray@...com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Sumit Semwal <sumit.semwal@...aro.org>
CC:     <linux-serial@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>,
        <linaro-mm-sig@...ts.linaro.org>,
        Erwan Le Ray <erwan.leray@...com>,
        Fabrice Gasnier <fabrice.gasnier@...com>
Subject: [PATCH 1/2] dt-bindings: serial: add generic DT binding for announcing RTS/CTS lines

Add support of generic DT binding for annoucing RTS/CTS lines. The initial
binding 'st,hw-flow-control' is not needed anymore since generic binding
is available, but is kept for backward compatibility.

Signed-off-by: Erwan Le Ray <erwan.leray@...com>

diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
index 75b8521eb7cb..06d5f251ec88 100644
--- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
@@ -35,9 +35,11 @@ properties:
     description: label associated with this uart
 
   st,hw-flow-ctrl:
-    description: enable hardware flow control
+    description: enable hardware flow control (deprecated)
     $ref: /schemas/types.yaml#/definitions/flag
 
+  uart-has-rtscts: true
+
   dmas:
     minItems: 1
     maxItems: 2
-- 
2.17.1