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41 lines
1.2 KiB
Plaintext
41 lines
1.2 KiB
Plaintext
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Holtek ht16k33 RAM mapping 16*8 LED controller driver with keyscan
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-------------------------------------------------------------------------------
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Required properties:
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- compatible: "holtek,ht16k33"
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- reg: I2C slave address of the chip.
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- interrupts: Interrupt specification for the key pressed interrupt.
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- refresh-rate-hz: Display update interval in HZ.
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- debounce-delay-ms: Debouncing interval time in milliseconds.
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- linux,keymap: The keymap for keys as described in the binding
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document (devicetree/bindings/input/matrix-keymap.txt).
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Optional properties:
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- linux,no-autorepeat: Disable keyrepeat.
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- default-brightness-level: Initial brightness level [0-15] (default: 15).
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Example:
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&i2c1 {
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ht16k33: ht16k33@70 {
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compatible = "holtek,ht16k33";
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reg = <0x70>;
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refresh-rate-hz = <20>;
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debounce-delay-ms = <50>;
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interrupt-parent = <&gpio4>;
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interrupts = <5 (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_EDGE_RISING)>;
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linux,keymap = <
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MATRIX_KEY(2, 0, KEY_F6)
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MATRIX_KEY(3, 0, KEY_F8)
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MATRIX_KEY(4, 0, KEY_F10)
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MATRIX_KEY(5, 0, KEY_F4)
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MATRIX_KEY(6, 0, KEY_F2)
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MATRIX_KEY(2, 1, KEY_F5)
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MATRIX_KEY(3, 1, KEY_F7)
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MATRIX_KEY(4, 1, KEY_F9)
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MATRIX_KEY(5, 1, KEY_F3)
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MATRIX_KEY(6, 1, KEY_F1)
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>;
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};
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};
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