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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>
28 lines
699 B
Plaintext
28 lines
699 B
Plaintext
Samsung tm2-touchkey
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Required properties:
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- compatible: must be "cypress,tm2-touchkey"
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- reg: I2C address of the chip.
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- interrupt-parent: a phandle for the interrupt controller (see interrupt
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binding[0]).
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- interrupts: interrupt to which the chip is connected (see interrupt
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binding[0]).
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- vcc-supply : internal regulator output. 1.8V
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- vdd-supply : power supply for IC 3.3V
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[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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Example:
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&i2c0 {
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/* ... */
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touchkey@20 {
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compatible = "cypress,tm2-touchkey";
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reg = <0x20>;
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interrupt-parent = <&gpa3>;
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interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
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vcc-supply=<&ldo32_reg>;
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vdd-supply=<&ldo33_reg>;
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};
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};
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