Re: [PATCH 1/3] dt-bindings: new binding for Himax HX8357D display panels

From: Noralf TrÃnnes
Date: Sat Oct 27 2018 - 12:11:08 EST

Den 24.10.2018 20.43, skrev Eric Anholt:
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.


This binding is closely modeled after the ili9341 binding, for a
similar product from adafruit. The primary difference is that the
hx8367d doesn't have a reset line that I can find in the schematics.

Typo s/hx8367d/hx8357d/

The adafruit display has an AXP803 that resets the controller.

Acked-by: Noralf TrÃnnes <noralf@xxxxxxxxxxx>

Signed-off-by: Eric Anholt <eric@xxxxxxxxxx>
.../bindings/display/himax,hx8357d.txt | 25 +++++++++++++++++++
1 file changed, 25 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 000000000000..48586e570be0
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/himax,hx8357d.txt
@@ -0,0 +1,25 @@
+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
+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
+ display@0{
+ compatible = "adafruit,yx350hv15", "himax,hx8357d";
+ reg = <0>;
+ spi-max-frequency = <32000000>;
+ dc-gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
+ rotation = <90>;
+ backlight = <&backlight>;
+ };