TI-NSPIRE Keypad
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Required properties:
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- compatible: Compatible property value should be "ti,nspire-keypad".
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- reg: Physical base address of the peripheral and length of memory mapped
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region.
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- interrupts: The interrupt number for the peripheral.
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- scan-interval: How often to scan in us. Based on a APB speed of 33MHz, the
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maximum and minimum delay time is ~2000us and ~500us respectively
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- row-delay: How long to wait before scanning each row.
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- clocks: The clock this peripheral is attached to.
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- linux,keymap: The keymap to use
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(see Documentation/devicetree/bindings/input/matrix-keymap.txt)
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Optional properties:
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- active-low: Specify that the keypad is active low (i.e. logical low signifies
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a key press).
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Example:
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input {
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compatible = "ti,nspire-keypad";
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reg = <0x900E0000 0x1000>;
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interrupts = <16>;
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scan-interval = <1000>;
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row-delay = <200>;
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clocks = <&apb_pclk>;
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linux,keymap = <
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0x0000001c 0x0001001c 0x00040039
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0x0005002c 0x00060015 0x0007000b
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0x0008000f 0x0100002d 0x01010011
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0x0102002f 0x01030004 0x01040016
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0x01050014 0x0106001f 0x01070002
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0x010a006a 0x02000013 0x02010010
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0x02020019 0x02030007 0x02040018
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0x02050031 0x02060032 0x02070005
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0x02080028 0x0209006c 0x03000026
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0x03010025 0x03020024 0x0303000a
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0x03040017 0x03050023 0x03060022
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0x03070008 0x03080035 0x03090069
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0x04000021 0x04010012 0x04020020
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0x0404002e 0x04050030 0x0406001e
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0x0407000d 0x04080037 0x04090067
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0x05010038 0x0502000c 0x0503001b
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0x05040034 0x0505001a 0x05060006
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0x05080027 0x0509000e 0x050a006f
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0x0600002b 0x0602004e 0x06030068
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0x06040003 0x0605006d 0x06060009
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0x06070001 0x0609000f 0x0708002a
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0x0709001d 0x070a0033 >;
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};
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