Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/input/elants_i2c.txt b/Documentation/devicetree/bindings/input/elants_i2c.txt
new file mode 100644
index 000000000..5edac8be0
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/elants_i2c.txt
@@ -0,0 +1,34 @@
+Elantech I2C Touchscreen
+
+Required properties:
+- compatible: must be "elan,ekth3500".
+- reg: I2C address of the chip.
+- interrupts: interrupt to which the chip is connected (see interrupt
+  binding[0]).
+
+Optional properties:
+- wakeup-source: touchscreen can be used as a wakeup source.
+- pinctrl-names: should be "default" (see pinctrl binding [1]).
+- pinctrl-0: a phandle pointing to the pin settings for the device (see
+  pinctrl binding [1]).
+- reset-gpios: reset gpio the chip is connected to.
+- vcc33-supply: a phandle for the regulator supplying 3.3V power.
+- vccio-supply: a phandle for the regulator supplying IO power.
+
+[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
+
+Example:
+	&i2c1 {
+		/* ... */
+
+		touchscreen@10 {
+			compatible = "elan,ekth3500";
+			reg = <0x10>;
+			interrupt-parent = <&gpio4>;
+			interrupts = <0x0 IRQ_TYPE_EDGE_FALLING>;
+			wakeup-source;
+		};
+
+		/* ... */
+	};