109 строки
3.5 KiB
Plaintext
109 строки
3.5 KiB
Plaintext
* 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>;
|
|
status = "okay";
|
|
|
|
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;
|
|
|
|
};
|
|
};
|