dt-bindings: input/touchscreen: add bindings for zinitix

This patch adds dts bindings for the zinitix bt541 touchscreen.

Signed-off-by: Michael Srba <Michael.Srba@seznam.cz>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201001122949.16846-2-michael.srba@seznam.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/Documentation/devicetree/bindings/input/touchscreen/zinitix.txt b/Documentation/devicetree/bindings/input/touchscreen/zinitix.txt
new file mode 100644 (file)
index 0000000..446efb9
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/zinitix.txt
@@ -0,0 +1,40 @@
+Device tree bindings for Zinitx BT541 touchscreen controller
+
+Required properties:
+
+ - compatible          : Should be "zinitix,bt541"
+ - reg                 : I2C address of the chip. Should be 0x20
+ - interrupts          : Interrupt to which the chip is connected
+
+Optional properties:
+
+ - vdd-supply          : Analog power supply regulator on VCCA pin
+ - vddo-supply         : Digital power supply regulator on VDD pin
+ - zinitix,mode                : Mode of reporting touch points. Some modes may not work
+                         with a particular ts firmware for unknown reasons. Available
+                         modes are 1 and 2. Mode 2 is the default and preferred.
+
+The touchscreen-* properties are documented in touchscreen.txt in this
+directory.
+
+Example:
+
+       i2c@00000000 {
+               /* ... */
+
+               bt541@20 {
+                       compatible = "zinitix,bt541";
+                       reg = <0x20>;
+                       interrupt-parent = <&msmgpio>;
+                       interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&tsp_default>;
+                       vdd-supply = <&reg_vdd_tsp>;
+                       vddo-supply = <&pm8916_l6>;
+                       touchscreen-size-x = <540>;
+                       touchscreen-size-y = <960>;
+                       zinitix,mode = <2>;
+               };
+
+               /* ... */
+       };

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index d3891386d6710effe562acad382bf71f7fa16411..bd7b2d40412433d2b264d217009a2703b7209183 100644 (file)
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1143,6 +1143,8 @@ patternProperties:
     description: Shenzhen Zidoo Technology Co., Ltd.
   "^zii,.*":
     description: Zodiac Inflight Innovations
+  "^zinitix,.*":
+    description: Zinitix Co., Ltd
   "^zte,.*":
     description: ZTE Corp.
   "^zyxel,.*":