* Rohm BU21029 Touch Screen Controller
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Required properties:
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- compatible : must be "rohm,bu21029"
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- reg : i2c device address of the chip (0x40 or 0x41)
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- interrupt-parent : the phandle for the gpio controller
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- interrupts : (gpio) interrupt to which the chip is connected
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- rohm,x-plate-ohms : x-plate resistance in Ohm
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Optional properties:
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- reset-gpios : gpio pin to reset the chip (active low)
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- touchscreen-size-x : horizontal resolution of touchscreen (in pixels)
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- touchscreen-size-y : vertical resolution of touchscreen (in pixels)
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- touchscreen-max-pressure: maximum pressure value
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- vdd-supply : power supply for the controller
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Example:
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&i2c1 {
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/* ... */
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bu21029: bu21029@40 {
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compatible = "rohm,bu21029";
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reg = <0x40>;
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interrupt-parent = <&gpio1>;
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interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
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reset-gpios = <&gpio6 16 GPIO_ACTIVE_LOW>;
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rohm,x-plate-ohms = <600>;
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touchscreen-size-x = <800>;
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touchscreen-size-y = <480>;
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touchscreen-max-pressure = <4095>;
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};
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/* ... */
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};
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