The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/input/qcom,pm8xxx-keypad.txt

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    1 Qualcomm PM8xxx PMIC Keypad
    2 
    3 PROPERTIES
    4 
    5 - compatible:
    6         Usage: required
    7         Value type: <string>
    8         Definition: must be one of:
    9                     "qcom,pm8058-keypad"
   10                     "qcom,pm8921-keypad"
   11 
   12 - reg:
   13         Usage: required
   14         Value type: <prop-encoded-array>
   15         Definition: address of keypad control register
   16 
   17 - interrupts:
   18         Usage: required
   19         Value type: <prop-encoded-array>
   20         Definition: the first interrupt specifies the key sense interrupt
   21                     and the second interrupt specifies the key stuck interrupt.
   22                     The format of the specifier is defined by the binding
   23                     document describing the node's interrupt parent.
   24 
   25 - linux,keymap:
   26         Usage: required
   27         Value type: <prop-encoded-array>
   28         Definition: the linux keymap. More information can be found in
   29                     input/matrix-keymap.txt.
   30 
   31 - linux,keypad-no-autorepeat:
   32         Usage: optional
   33         Value type: <bool>
   34         Definition: don't enable autorepeat feature.
   35 
   36 - wakeup-source:
   37         Usage: optional
   38         Value type: <bool>
   39         Definition: use any event on keypad as wakeup event.
   40                     (Legacy property supported: "linux,keypad-wakeup")
   41 
   42 - keypad,num-rows:
   43         Usage: required
   44         Value type: <u32>
   45         Definition: number of rows in the keymap. More information can be found
   46                     in input/matrix-keymap.txt.
   47 
   48 - keypad,num-columns:
   49         Usage: required
   50         Value type: <u32>
   51         Definition: number of columns in the keymap. More information can be
   52                     found in input/matrix-keymap.txt.
   53 
   54 - debounce:
   55         Usage: optional
   56         Value type: <u32>
   57         Definition: time in microseconds that key must be pressed or release
   58                     for key sense interrupt to trigger.
   59 
   60 - scan-delay:
   61         Usage: optional
   62         Value type: <u32>
   63         Definition: time in microseconds to pause between successive scans
   64                     of the matrix array.
   65 
   66 - row-hold:
   67         Usage: optional
   68         Value type: <u32>
   69         Definition: time in nanoseconds to pause between scans of each row in
   70                     the matrix array.
   71 
   72 EXAMPLE
   73 
   74         keypad@148 {
   75                 compatible = "qcom,pm8921-keypad";
   76                 reg = <0x148>;
   77                 interrupt-parent = <&pmicintc>;
   78                 interrupts = <74 1>, <75 1>;
   79                 linux,keymap = <
   80                         MATRIX_KEY(0, 0, KEY_VOLUMEUP)
   81                         MATRIX_KEY(0, 1, KEY_VOLUMEDOWN)
   82                         MATRIX_KEY(0, 2, KEY_CAMERA_FOCUS)
   83                         MATRIX_KEY(0, 3, KEY_CAMERA)
   84                         >;
   85                 keypad,num-rows = <1>;
   86                 keypad,num-columns = <5>;
   87                 debounce = <15>;
   88                 scan-delay = <32>;
   89                 row-hold = <91500>;
   90         };

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