Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / input / qcom,pm8xxx-keypad.txt

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+Qualcomm PM8xxx PMIC Keypad
+
+PROPERTIES
+
+- compatible:
+       Usage: required
+       Value type: <string>
+       Definition: must be one of:
+                   "qcom,pm8058-keypad"
+                   "qcom,pm8921-keypad"
+
+- reg:
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: address of keypad control register
+
+- interrupts:
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: the first interrupt specifies the key sense interrupt
+                   and the second interrupt specifies the key stuck interrupt.
+                   The format of the specifier is defined by the binding
+                   document describing the node's interrupt parent.
+
+- linux,keymap:
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: the linux keymap. More information can be found in
+                   input/matrix-keymap.txt.
+
+- linux,keypad-no-autorepeat:
+       Usage: optional
+       Value type: <bool>
+       Definition: don't enable autorepeat feature.
+
+- linux,keypad-wakeup:
+       Usage: optional
+       Value type: <bool>
+       Definition: use any event on keypad as wakeup event.
+
+- keypad,num-rows:
+       Usage: required
+       Value type: <u32>
+       Definition: number of rows in the keymap. More information can be found
+                   in input/matrix-keymap.txt.
+
+- keypad,num-columns:
+       Usage: required
+       Value type: <u32>
+       Definition: number of columns in the keymap. More information can be
+                   found in input/matrix-keymap.txt.
+
+- debounce:
+       Usage: optional
+       Value type: <u32>
+       Definition: time in microseconds that key must be pressed or release
+                   for key sense interrupt to trigger.
+
+- scan-delay:
+       Usage: optional
+       Value type: <u32>
+       Definition: time in microseconds to pause between successive scans
+                   of the matrix array.
+
+- row-hold:
+       Usage: optional
+       Value type: <u32>
+       Definition: time in nanoseconds to pause between scans of each row in
+                   the matrix array.
+
+EXAMPLE
+
+       keypad@148 {
+               compatible = "qcom,pm8921-keypad";
+               reg = <0x148>;
+               interrupt-parent = <&pmicintc>;
+               interrupts = <74 1>, <75 1>;
+               linux,keymap = <
+                       MATRIX_KEY(0, 0, KEY_VOLUMEUP)
+                       MATRIX_KEY(0, 1, KEY_VOLUMEDOWN)
+                       MATRIX_KEY(0, 2, KEY_CAMERA_FOCUS)
+                       MATRIX_KEY(0, 3, KEY_CAMERA)
+                       >;
+               keypad,num-rows = <1>;
+               keypad,num-columns = <5>;
+               debounce = <15>;
+               scan-delay = <32>;
+               row-hold = <91500>;
+       };