linux-kernel - [PATCH RFC 2/2] Input: raspberrypi-ts - add devicetree binding documentation

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Message-Id: <20181205220902.27682-3-nsaenzjulienne@suse.de>
Date:   Wed,  5 Dec 2018 23:09:04 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     linux-kernel@...r.kernel.org
Cc:     linux-rpi-kernel@...ts.infradead.org, stefan.wahren@...e.com,
        eric@...olt.net, agraf@...e.de,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH RFC 2/2] Input: raspberrypi-ts - add devicetree binding documentation

Adds device tree documentation for Raspberry Pi's official 7"
touchscreen. The firmware mailbox interface allows the ARM core to
control the device.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
---
 .../touchscreen/raspberrypi,firmware-ts.txt   | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt

diff --git a/Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt b/Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt
new file mode 100644
index 000000000000..d28189476279
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt
@@ -0,0 +1,25 @@
+Raspberry Pi 3 firmware based 7" touchscreen
+=====================================
+
+Required properties:
+ - compatible: "raspberrypi,firmware-ts"
+
+Optional properties:
+ - touchscreen-size-x: See touchscreen.txt
+ - touchscreen-size-y: See touchscreen.txt
+ - touchscreen-inverted-x: See touchscreen.txt
+ - touchscreen-inverted-y: See touchscreen.txt
+ - touchscreen-swapped-x-y: See touchscreen.txt
+
+Example:
+
+firmware: firmware-rpi {
+	compatible = "raspberrypi,bcm2835-firmware", "simple-bus";
+	mboxes = <&mailbox>;
+
+	ts: touchscreen {
+		compatible = "raspberrypi,firmware-ts";
+		touchscreen-size-x = <800>;
+		touchscreen-size-y = <480>;
+	};
+};
-- 
2.19.2