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 --- .../display/panel/raspberrypi,touchscreen.txt | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/panel/raspberrypi,touchscreen.txt
diff --git a/Documentation/devicetree/bindings/display/panel/raspberrypi,touchscreen.txt b/Documentation/devicetree/bindings/display/panel/raspberrypi,touchscreen.txt new file mode 100644 index 000000000000..fd328c52706b --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/raspberrypi,touchscreen.txt @@ -0,0 +1,45 @@ +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 the binding currently covers the DSI display parts but not its +touch input. + +Required properties: +- compatible: Must be "raspberrypi,touchscreen" +- raspberrypi,touchscreen-bridge: + Handle to the I2C device for Atmel microcontroller + +Example: + +dsi1: dsi@7e700000 { + #address-cells = <1>; + #size-cells = <0>; + <...> + + pitouchscreen: panel@0 { + compatible = "raspberrypi,touchscreen"; + reg = <0>; + + raspberrypi,touchscreen-bridge = <&pitouchscreen_bridge>; + }; +}; + +i2c_dsi: i2c { + compatible = "i2c-gpio"; + #address-cells = <1>; + #size-cells = <0>; + gpios = <&gpio 28 0 + &gpio 29 0>; + + pitouchscreen_bridge: bridge@45 { + compatible = "raspberrypi,touchscreen-bridge-i2c"; + reg = <0x45>; + }; +};