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authorJaechul Lee <jcsing.lee@samsung.com>2017-01-19 01:35:42 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-01-19 01:50:23 +0300
commit72d1f2346ded5b1743d7938f4522550b4da9c82d (patch)
tree8dd8b8ed91df9dda4783166472f192d9416351ec /Documentation/devicetree/bindings/input/cypress,tm2-touchkey.txt
parentaa6f9222218273cc54ec8d3c91ad8207eef21f99 (diff)
downloadlinux-72d1f2346ded5b1743d7938f4522550b4da9c82d.tar.xz
Input: tm2-touchkey - add touchkey driver support for TM2
This patch adds support for the TM2 touch key and led functionality. The driver interfaces with userspace through an input device and reports KEY_PHONE and KEY_BACK event types. LED brightness can be controlled by "/sys/class/leds/tm2-touchkey/brightness". Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Signed-off-by: Jaechul Lee <jcsing.lee@samsung.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Reviewed-by: Andi Shyti <andi.shyti@samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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+Samsung tm2-touchkey
+
+Required properties:
+- compatible: must be "cypress,tm2-touchkey"
+- reg: I2C address of the chip.
+- interrupt-parent: a phandle for the interrupt controller (see interrupt
+ binding[0]).
+- interrupts: interrupt to which the chip is connected (see interrupt
+ binding[0]).
+- vcc-supply : internal regulator output. 1.8V
+- vdd-supply : power supply for IC 3.3V
+
+[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+
+Example:
+ &i2c0 {
+ /* ... */
+
+ touchkey@20 {
+ compatible = "cypress,tm2-touchkey";
+ reg = <0x20>;
+ interrupt-parent = <&gpa3>;
+ interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+ vcc-supply=<&ldo32_reg>;
+ vdd-supply=<&ldo33_reg>;
+ };
+ };