40 lines
1.3 KiB
Plaintext
40 lines
1.3 KiB
Plaintext
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* Texas Instruments tsc2007 touchscreen controller
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Required properties:
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- compatible: must be "ti,tsc2007".
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- reg: I2C address of the chip.
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- ti,x-plate-ohms: X-plate resistance in ohms.
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Optional properties:
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- gpios: the interrupt gpio the chip is connected to (trough the penirq pin).
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The penirq pin goes to low when the panel is touched.
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(see GPIO binding[1] for more details).
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- interrupts: (gpio) interrupt to which the chip is connected
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(see interrupt binding[0]).
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- ti,max-rt: maximum pressure.
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- ti,fuzzx: specifies the absolute input fuzz x value.
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If set, it will permit noise in the data up to +- the value given to the fuzz
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parameter, that is used to filter noise from the event stream.
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- ti,fuzzy: specifies the absolute input fuzz y value.
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- ti,fuzzz: specifies the absolute input fuzz z value.
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- ti,poll-period: how much time to wait (in milliseconds) before reading again the
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values from the tsc2007.
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[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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[1]: Documentation/devicetree/bindings/gpio/gpio.txt
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Example:
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&i2c1 {
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/* ... */
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tsc2007@49 {
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compatible = "ti,tsc2007";
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reg = <0x49>;
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interrupt-parent = <&gpio4>;
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interrupts = <0x0 0x8>;
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gpios = <&gpio4 0 0>;
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ti,x-plate-ohms = <180>;
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};
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/* ... */
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};
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