linux-kernel - [PATCH 1/2] dt-bindings: serial: 8250_omap: Add compatible for AM654 UART controller

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Date:   Tue, 19 Jun 2018 14:44:49 -0500
From:   Nishanth Menon <nm@...com>
To:     Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-serial@...r.kernel.org>, Nishanth Menon <nm@...com>,
        Tony Lindgren <tony@...mide.com>,
        Tero Kristo <t-kristo@...com>, Vignesh R <vigneshr@...com>,
        Jiri Slaby <jslaby@...e.com>, Sekhar Nori <nsekhar@...com>
Subject: [PATCH 1/2] dt-bindings: serial: 8250_omap: Add compatible for AM654 UART controller

AM654 uses a UART controller that is only partially compatible with
existing 8250 UART. UART DMA integration is substantially different
and even a match against standard 8250 or omap4 would result in
non-working UART once DMA is enabled by default.

Introduce a specific compatible to help build up the differences in
follow on patches.

Cc: Sekhar Nori <nsekhar@...com>
Cc: Vignesh R <vigneshr@...com>
Signed-off-by: Nishanth Menon <nm@...com>
---

Changes since RFC:
* DT binding has been split out as it's own patch and commit message elaborated

RFC: https://patchwork.kernel.org/patch/10447641/

 Documentation/devicetree/bindings/serial/omap_serial.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt
index 4b0f05adb228..c35d5ece1156 100644
--- a/Documentation/devicetree/bindings/serial/omap_serial.txt
+++ b/Documentation/devicetree/bindings/serial/omap_serial.txt
@@ -1,6 +1,7 @@
 OMAP UART controller
 
 Required properties:
+- compatible : should be "ti,am654-uart" for AM654 controllers
 - compatible : should be "ti,omap2-uart" for OMAP2 controllers
 - compatible : should be "ti,omap3-uart" for OMAP3 controllers
 - compatible : should be "ti,omap4-uart" for OMAP4 controllers
-- 
2.15.1