From 72d1f2346ded5b1743d7938f4522550b4da9c82d Mon Sep 17 00:00:00 2001 From: Jaechul Lee Date: Wed, 18 Jan 2017 14:35:42 -0800 Subject: 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 Signed-off-by: Jaechul Lee Reviewed-by: Javier Martinez Canillas Reviewed-by: Andi Shyti Reviewed-by: Chanwoo Choi Tested-by: Chanwoo Choi Acked-by: Krzysztof Kozlowski Acked-by: Rob Herring Signed-off-by: Dmitry Torokhov --- .../bindings/input/cypress,tm2-touchkey.txt | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/cypress,tm2-touchkey.txt (limited to 'Documentation/devicetree/bindings/input/cypress,tm2-touchkey.txt') diff --git a/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.txt b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.txt new file mode 100644 index 000000000000..635f62c756ee --- /dev/null +++ b/Documentation/devicetree/bindings/input/cypress,tm2-touchkey.txt @@ -0,0 +1,27 @@ +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>; + }; + }; -- cgit v1.2.3