[PATCH v6 4/5] dt-bindings: Document the Raspberry Pi Touchscreen nodes.

Eric Anholt
2017-08-15T23:53:01Z

This doesn't yet cover input, but the driver does get the display
working when the firmware is disabled from talking to our I2C lines.

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Rob Herring <robh@kernel.org>
---
.../panel/raspberrypi,7inch-touchscreen.txt | 49 ++++++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchscreen.txt

diff --git a/Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchscreen.txt b/Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchscreen.txt
new file mode 100644
index 000000000000..e9e19c059260
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchscreen.txt
@@ -0,0 +1,49 @@
+This binding covers the official 7" (800x480) Raspberry Pi touchscreen
+panel.
+
+This DSI panel contains:
+
+- TC358762 DSI->DPI bridge
+- Atmel microcontroller on I2C for power sequencing the DSI bridge and
+ controlling backlight
+- Touchscreen controller on I2C for touch input
+
+and this binding covers the DSI display parts but not its touch input.
+
+Required properties:
+- compatible: Must be "raspberrypi,7inch-touchscreen-panel"
+- reg: Must be "45"
+- port: See panel-common.txt
+
+Example:
+
+dsi1: dsi@7e700000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ <...>
+
+ port {
+ dsi_out_port: endpoint {
+ remote-endpoint = <&panel_dsi_port>;
+ };
+ };
+};
+
+i2c_dsi: i2c {
+ compatible = "i2c-gpio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ gpios = <&gpio 28 0
+ &gpio 29 0>;
+
+ lcd@45 {
+ compatible = "raspberrypi,7inch-touchscreen-panel";
+ reg = <0x45>;
+
+ port {
+ panel_dsi_port: endpoint {
+ remote-endpoint = <&dsi_out_port>;
+ };
+ };
+ };
+};
--
2.14.1