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    Subject[PATCH v4 1/2] Input: bcm-keypad: add device tree bindings
    Date
    Documents the Broadcom keypad controller device tree bindings.

    Reviewed-by: Ray Jui <rjui@broadcom.com>
    Signed-off-by: Scott Branden <sbranden@broadcom.com>
    ---
    .../devicetree/bindings/input/brcm,bcm-keypad.txt | 108 +++++++++++++++++++++
    1 file changed, 108 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/input/brcm,bcm-keypad.txt

    diff --git a/Documentation/devicetree/bindings/input/brcm,bcm-keypad.txt b/Documentation/devicetree/bindings/input/brcm,bcm-keypad.txt
    new file mode 100644
    index 0000000..b77f50b
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/input/brcm,bcm-keypad.txt
    @@ -0,0 +1,108 @@
    +* 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;
    +
    + };
    +};
    --
    2.3.0


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