From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludovic.desroches@microchip.com (Ludovic Desroches) Date: Fri, 20 Oct 2017 15:31:17 +0200 Subject: [PATCH v3 1/5] dt-bindings: input: Add Atmel PTC subsystem bindings In-Reply-To: <20171020133121.7992-1-ludovic.desroches@microchip.com> References: <20171020133121.7992-1-ludovic.desroches@microchip.com> Message-ID: <20171020133121.7992-2-ludovic.desroches@microchip.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add description of the Atmel PTC subsystem bindings. Signed-off-by: Ludovic Desroches Acked-by: Rob Herring --- .../devicetree/bindings/input/atmel,ptc.txt | 67 ++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/atmel,ptc.txt diff --git a/Documentation/devicetree/bindings/input/atmel,ptc.txt b/Documentation/devicetree/bindings/input/atmel,ptc.txt new file mode 100644 index 000000000000..a183fd511e04 --- /dev/null +++ b/Documentation/devicetree/bindings/input/atmel,ptc.txt @@ -0,0 +1,67 @@ +Atmel PTC Subsystem + +The Atmel Peripheral Touch Controller subsystem offers built-in hardware +for capacitive touch measurement on sensors that function as buttons, sliders +and wheels. + +1) PTC Subsystem node + +Required properties: +- compatible: Must be "atmel,sama5d2-ptc" +- reg: Address, length of the shared memory and ppp registers location + and length. +- clocks: Phandlers to the clocks. +- clock-names: Must be "ptc_clk", "ptc_int_osc", "slow_clk". +- #address-cells: Must be one. The cell is the button or scroller id. +- #size-cells: Must be zero. + +Example: + ptc at fc060000 { + compatible = "atmel,sama5d2-ptc"; + reg = <0x00800000 0x10000 + 0xfc060000 0xcf>; + interrupts = <58 IRQ_TYPE_LEVEL_HIGH 7>; + clocks = <&ptc_clk>, <&main>, <&clk32k>; + clock-names = "ptc_clk", "ptc_int_osc", "slow_clk"; + #address-cells = <1>; + #size-cells = <0>; + + [ child node definitions... ] + }; + +2) Scroller / buttons subnodes + +Subnodes describe the kind of sensors the customer want to use. They have to be +named according to their function: button, slider or wheel. + +2.1) Scroller subnodes + +Required properties: +- reg: Id of the scroller, each id must be different. + +Example: + slider at 0 { + reg = <0>; + }; + + wheel at 1 { + reg = <1>; + }; + +2.2) Button subnodes + +Required properties: +- reg: Id of node used for the button, each id must be + different. +- linux,keycode: Key code of the button. + +Example: + button at 8 { + reg = <8>; + linux,keycode = <2>; + }; + + button at 9 { + reg = <9>; + linux,keycode = <3>; + }; -- 2.12.2