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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | * Broadcom Keypad Controller device tree bindings Broadcom Keypad controller is used to interface a SoC with a matrix-type keypad device. The keypad controller supports multiple row and column lines. A key can be placed at each intersection of a unique row and a unique column. The keypad controller can sense a key-press and key-release and report the event using a interrupt to the cpu. This binding is based on the matrix-keymap binding with the following changes: keypad,num-rows and keypad,num-columns are required. Required SoC Specific Properties: - compatible: should be "brcm,bcm-keypad" - reg: physical base address of the controller and length of memory mapped region. - interrupts: The interrupt number to the cpu. Board Specific Properties: - keypad,num-rows: Number of row lines connected to the keypad controller. - keypad,num-columns: Number of column lines connected to the keypad controller. - col-debounce-filter-period: The debounce period for the Column filter. KEYPAD_DEBOUNCE_1_ms = 0 KEYPAD_DEBOUNCE_2_ms = 1 KEYPAD_DEBOUNCE_4_ms = 2 KEYPAD_DEBOUNCE_8_ms = 3 KEYPAD_DEBOUNCE_16_ms = 4 KEYPAD_DEBOUNCE_32_ms = 5 KEYPAD_DEBOUNCE_64_ms = 6 KEYPAD_DEBOUNCE_128_ms = 7 - status-debounce-filter-period: The debounce period for the Status filter. KEYPAD_DEBOUNCE_1_ms = 0 KEYPAD_DEBOUNCE_2_ms = 1 KEYPAD_DEBOUNCE_4_ms = 2 KEYPAD_DEBOUNCE_8_ms = 3 KEYPAD_DEBOUNCE_16_ms = 4 KEYPAD_DEBOUNCE_32_ms = 5 KEYPAD_DEBOUNCE_64_ms = 6 KEYPAD_DEBOUNCE_128_ms = 7 - row-output-enabled: An optional property indicating whether the row or column is being used as output. If specified the row is being used as the output. Else defaults to column. - pull-up-enabled: An optional property indicating the Keypad scan mode. If specified implies the keypad scan pull-up has been enabled. - autorepeat: Boolean, Enable auto repeat feature of Linux input subsystem (optional). - linux,keymap: The keymap for keys as described in the binding document devicetree/bindings/input/matrix-keymap.txt. Example: #include "dt-bindings/input/input.h" / { keypad: keypad@180ac000 { /* Required SoC specific properties */ compatible = "brcm,bcm-keypad"; /* Required Board specific properties */ keypad,num-rows = <5>; keypad,num-columns = <5>; linux,keymap = <MATRIX_KEY(0x00, 0x02, KEY_F) /* key_forward */ MATRIX_KEY(0x00, 0x03, KEY_HOME) /* key_home */ MATRIX_KEY(0x00, 0x04, KEY_M) /* key_message */ MATRIX_KEY(0x01, 0x00, KEY_A) /* key_contacts */ MATRIX_KEY(0x01, 0x01, KEY_1) /* key_1 */ MATRIX_KEY(0x01, 0x02, KEY_2) /* key_2 */ MATRIX_KEY(0x01, 0x03, KEY_3) /* key_3 */ MATRIX_KEY(0x01, 0x04, KEY_S) /* key_speaker */ MATRIX_KEY(0x02, 0x00, KEY_P) /* key_phone */ MATRIX_KEY(0x02, 0x01, KEY_4) /* key_4 */ MATRIX_KEY(0x02, 0x02, KEY_5) /* key_5 */ MATRIX_KEY(0x02, 0x03, KEY_6) /* key_6 */ MATRIX_KEY(0x02, 0x04, KEY_VOLUMEUP) /* key_vol_up */ MATRIX_KEY(0x03, 0x00, KEY_C) /* key_call_log */ MATRIX_KEY(0x03, 0x01, KEY_7) /* key_7 */ MATRIX_KEY(0x03, 0x02, KEY_8) /* key_8 */ MATRIX_KEY(0x03, 0x03, KEY_9) /* key_9 */ MATRIX_KEY(0x03, 0x04, KEY_VOLUMEDOWN) /* key_vol_down */ MATRIX_KEY(0x04, 0x00, KEY_H) /* key_headset */ MATRIX_KEY(0x04, 0x01, KEY_KPASTERISK) /* key_* */ MATRIX_KEY(0x04, 0x02, KEY_0) /* key_0 */ MATRIX_KEY(0x04, 0x03, KEY_GRAVE) /* key_# */ MATRIX_KEY(0x04, 0x04, KEY_MUTE) /* key_mute */ >; /* Optional board specific properties */ col-debounce-filter-period = <5>; row-output-enabled; pull-up-enabled; }; }; |