From 86619c3859c0ff066e519257442b37f90b1212af Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 24 Oct 2018 11:43:11 -0700
Subject: [PATCH] dt-bindings: new binding for Himax HX8357D display panels
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This adds a new binding for Himax HX8357D display panels. It includes
a compatible string for one display (more can be added in the future).
The YX350HV15 panel[1] is found in the Adafruit PiTFT 3.5" Touch
Screen for Raspberry Pi.
[1] https://learn.adafruit.com/adafruit-pitft-3-dot-5-touch-screen-for-raspberry-pi/downloads
This binding is closely modeled after the ili9341 binding, for a
similar product from adafruit. The primary difference is that the
hx8357d doesn't have a reset line that I can find in the schematics.
v2: Document the "reg" property (requested by Rob), fix commit message
typo (Noralf)
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181024184313.2967-2-eric@anholt.net
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
---
.../bindings/display/himax,hx8357d.txt | 26 +++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/himax,hx8357d.txt
diff --git a/Documentation/devicetree/bindings/display/himax,hx8357d.txt b/Documentation/devicetree/bindings/display/himax,hx8357d.txt
new file mode 100644
index 0000000000000..e641f664763d3
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/himax,hx8357d.txt
@@ -0,0 +1,26 @@
+Himax HX8357D display panels
+
+This binding is for display panels using a Himax HX8357D controller in SPI
+mode, such as the Adafruit 3.5" TFT for Raspberry Pi.
+
+Required properties:
+- compatible: "adafruit,yx350hv15", "himax,hx8357d"
+- dc-gpios: D/C pin
+- reg: address of the panel on the SPI bus
+
+The node for this driver must be a child node of a SPI controller, hence
+all mandatory properties described in ../spi/spi-bus.txt must be specified.
+
+Optional properties:
+- rotation: panel rotation in degrees counter clockwise (0,90,180,270)
+- backlight: phandle of the backlight device attached to the panel
+
+Example:
+ display@0{
+ compatible = "adafruit,yx350hv15", "himax,hx8357d";
+ reg = <0>;
+ spi-max-frequency = <32000000>;
+ dc-gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
+ rotation = <90>;
+ backlight = <&backlight>;
+ };
--
GitLab