linux-kernel - [PATCH v3 1/2] dt-bindings: himax,hx8837: add HiMax HX8837 bindings

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Message-Id: <20181112023929.650002-1-lkundrak@v3.sk>
Date:   Mon, 12 Nov 2018 03:39:28 +0100
From:   Lubomir Rintel <lkundrak@...sk>
To:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lubomir Rintel <lkundrak@...sk>
Subject: [PATCH v3 1/2] dt-bindings: himax,hx8837: add HiMax HX8837 bindings

HiMax HX8837 is a display controller used on OLPC platforms.
It controlls backlight and is able to capture and freeze a frame when
the LCD controller (and the rest of the plaform) is powered off.

What is missing here is the description of connections to the LCD
controller and the panel. Maybe it would be a good idea to plug in it
between the two in a manner described in
<Documentation/devicetree/bindings/graph.txt>.

Signed-off-by: Lubomir Rintel <lkundrak@...sk>
Acked-by: Pavel Machek <pavel@....cz>

---
Changes since v2:
- s/betweend/between/

Changes since v1:
- s/load-gpio/load-gpios/
- Use interrupt bindings instead of gpio for the IRQ

 .../devicetree/bindings/misc/himax,hx8837.txt  | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/himax,hx8837.txt

diff --git a/Documentation/devicetree/bindings/misc/himax,hx8837.txt b/Documentation/devicetree/bindings/misc/himax,hx8837.txt
new file mode 100644
index 000000000000..d0822c679ae8
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/himax,hx8837.txt
@@ -0,0 +1,18 @@
+HX8837 Display Controller
+
+Required properties:
+- compatible: Should be "himax,hx8837".
+- reg: I2C address, must be 0x0d
+- stat-gpios: gpio specifier of DCON_STAT0 and DCON_STAT1 pins (active high)
+- load-gpios: gpio specifier of DCON_LOAD pin (active high)
+- interrupt: interrupt specifier of DCON_IRQ pin (edge falling)
+
+Example:
+	dcon@d {
+		compatible = "himax,hx8837";
+		reg = <0x0d>;
+		stat-gpios = <&gpio 100 GPIO_ACTIVE_HIGH
+			      &gpio 101 GPIO_ACTIVE_HIGH>;
+		load-gpios = <&gpio 142 GPIO_ACTIVE_HIGH>;
+		interrupts = <&gpio 124 IRQ_TYPE_EDGE_FALLING>;
+	};
-- 
2.19.1