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Diffstat (limited to 'Documentation/devicetree/bindings/input')
19 files changed, 620 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/fsl-mma8450.txt b/Documentation/devicetree/bindings/input/fsl-mma8450.txt new file mode 100644 index 00000000..0b96e573 --- /dev/null +++ b/Documentation/devicetree/bindings/input/fsl-mma8450.txt @@ -0,0 +1,12 @@ +* Freescale MMA8450 3-Axis Accelerometer + +Required properties: +- compatible : "fsl,mma8450". +- reg: the I2C address of MMA8450 + +Example: + +accelerometer: mma8450@1c { + compatible = "fsl,mma8450"; + reg = <0x1c>; +}; diff --git a/Documentation/devicetree/bindings/input/gpio-keys-polled.txt b/Documentation/devicetree/bindings/input/gpio-keys-polled.txt new file mode 100644 index 00000000..313abefa --- /dev/null +++ b/Documentation/devicetree/bindings/input/gpio-keys-polled.txt @@ -0,0 +1,38 @@ +Device-Tree bindings for input/gpio_keys_polled.c keyboard driver + +Required properties: + - compatible = "gpio-keys-polled"; + - poll-interval: Poll interval time in milliseconds + +Optional properties: + - autorepeat: Boolean, Enable auto repeat feature of Linux input + subsystem. + +Each button (key) is represented as a sub-node of "gpio-keys-polled": +Subnode properties: + + - gpios: OF device-tree gpio specification. + - label: Descriptive name of the key. + - linux,code: Keycode to emit. + +Optional subnode-properties: + - linux,input-type: Specify event type this button/key generates. + If not specified defaults to <1> == EV_KEY. + - debounce-interval: Debouncing interval time in milliseconds. + If not specified defaults to 5. + - gpio-key,wakeup: Boolean, button can wake-up the system. + +Example nodes: + + gpio_keys_polled { + compatible = "gpio-keys-polled"; + #address-cells = <1>; + #size-cells = <0>; + poll-interval = <100>; + autorepeat; + button@21 { + label = "GPIO Key UP"; + linux,code = <103>; + gpios = <&gpio1 0 1>; + }; + ... diff --git a/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt b/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt new file mode 100644 index 00000000..ead641c6 --- /dev/null +++ b/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt @@ -0,0 +1,46 @@ +* GPIO driven matrix keypad device tree bindings + +GPIO driven matrix keypad is used to interface a SoC with a matrix keypad. +The matrix keypad supports multiple row and column lines, a key can be +placed at each intersection of a unique row and a unique column. The matrix +keypad can sense a key-press and key-release by means of GPIO lines and +report the event using GPIO interrupts to the cpu. + +Required Properties: +- compatible: Should be "gpio-matrix-keypad" +- row-gpios: List of gpios used as row lines. The gpio specifier + for this property depends on the gpio controller to + which these row lines are connected. +- col-gpios: List of gpios used as column lines. The gpio specifier + for this property depends on the gpio controller to + which these column lines are connected. +- linux,keymap: The definition can be found at + bindings/input/matrix-keymap.txt + +Optional Properties: +- linux,no-autorepeat: do no enable autorepeat feature. +- linux,wakeup: use any event on keypad as wakeup event. +- debounce-delay-ms: debounce interval in milliseconds +- col-scan-delay-us: delay, measured in microseconds, that is needed + before we can scan keypad after activating column gpio + +Example: + matrix-keypad { + compatible = "gpio-matrix-keypad"; + debounce-delay-ms = <5>; + col-scan-delay-us = <2>; + + row-gpios = <&gpio2 25 0 + &gpio2 26 0 + &gpio2 27 0>; + + col-gpios = <&gpio2 21 0 + &gpio2 22 0>; + + linux,keymap = <0x0000008B + 0x0100009E + 0x02000069 + 0x0001006A + 0x0101001C + 0x0201006C>; + }; diff --git a/Documentation/devicetree/bindings/input/imx-keypad.txt b/Documentation/devicetree/bindings/input/imx-keypad.txt new file mode 100644 index 00000000..2ebaf7d2 --- /dev/null +++ b/Documentation/devicetree/bindings/input/imx-keypad.txt @@ -0,0 +1,53 @@ +* Freescale i.MX Keypad Port(KPP) device tree bindings + +The KPP is designed to interface with a keypad matrix with 2-point contact +or 3-point contact keys. The KPP is designed to simplify the software task +of scanning a keypad matrix. The KPP is capable of detecting, debouncing, +and decoding one or multiple keys pressed simultaneously on a keypad. + +Required SoC Specific Properties: +- compatible: Should be "fsl,<soc>-kpp". + +- reg: Physical base address of the KPP and length of memory mapped + region. + +- interrupts: The KPP interrupt number to the CPU(s). + +- clocks: The clock provided by the SoC to the KPP. Some SoCs use dummy +clock(The clock for the KPP is provided by the SoCs automatically). + +Required Board Specific Properties: +- pinctrl-names: The definition can be found at +pinctrl/pinctrl-bindings.txt. + +- pinctrl-0: The definition can be found at +pinctrl/pinctrl-bindings.txt. + +- linux,keymap: The definition can be found at +bindings/input/matrix-keymap.txt. + +Example: +kpp: kpp@73f94000 { + compatible = "fsl,imx51-kpp", "fsl,imx21-kpp"; + reg = <0x73f94000 0x4000>; + interrupts = <60>; + clocks = <&clks 0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_kpp_1>; + linux,keymap = <0x00000067 /* KEY_UP */ + 0x0001006c /* KEY_DOWN */ + 0x00020072 /* KEY_VOLUMEDOWN */ + 0x00030066 /* KEY_HOME */ + 0x0100006a /* KEY_RIGHT */ + 0x01010069 /* KEY_LEFT */ + 0x0102001c /* KEY_ENTER */ + 0x01030073 /* KEY_VOLUMEUP */ + 0x02000040 /* KEY_F6 */ + 0x02010042 /* KEY_F8 */ + 0x02020043 /* KEY_F9 */ + 0x02030044 /* KEY_F10 */ + 0x0300003b /* KEY_F1 */ + 0x0301003c /* KEY_F2 */ + 0x0302003d /* KEY_F3 */ + 0x03030074>; /* KEY_POWER */ +}; diff --git a/Documentation/devicetree/bindings/input/lpc32xx-key.txt b/Documentation/devicetree/bindings/input/lpc32xx-key.txt new file mode 100644 index 00000000..bcf62f85 --- /dev/null +++ b/Documentation/devicetree/bindings/input/lpc32xx-key.txt @@ -0,0 +1,31 @@ +NXP LPC32xx Key Scan Interface + +This binding is based on the matrix-keymap binding with the following +changes: + +Required Properties: +- compatible: Should be "nxp,lpc3220-key" +- reg: Physical base address of the controller and length of memory mapped + region. +- interrupts: The interrupt number to the cpu. +- nxp,debounce-delay-ms: Debounce delay in ms +- nxp,scan-delay-ms: Repeated scan period in ms +- linux,keymap: the key-code to be reported when the key is pressed + and released, see also + Documentation/devicetree/bindings/input/matrix-keymap.txt + +Note: keypad,num-rows and keypad,num-columns are required, and must be equal +since LPC32xx only supports square matrices + +Example: + + key@40050000 { + compatible = "nxp,lpc3220-key"; + reg = <0x40050000 0x1000>; + interrupts = <54 0>; + keypad,num-rows = <1>; + keypad,num-columns = <1>; + nxp,debounce-delay-ms = <3>; + nxp,scan-delay-ms = <34>; + linux,keymap = <0x00000002>; + }; diff --git a/Documentation/devicetree/bindings/input/matrix-keymap.txt b/Documentation/devicetree/bindings/input/matrix-keymap.txt new file mode 100644 index 00000000..c54919fa --- /dev/null +++ b/Documentation/devicetree/bindings/input/matrix-keymap.txt @@ -0,0 +1,27 @@ +A simple common binding for matrix-connected key boards. Currently targeted at +defining the keys in the scope of linux key codes since that is a stable and +standardized interface at this time. + +Required properties: +- linux,keymap: an array of packed 1-cell entries containing the equivalent + of row, column and linux key-code. The 32-bit big endian cell is packed + as: + row << 24 | column << 16 | key-code + +Optional properties: +Properties for the number of rows and columns are optional because some +drivers will use fixed values for these. +- keypad,num-rows: Number of row lines connected to the keypad controller. +- keypad,num-columns: Number of column lines connected to the keypad + controller. + +Some users of this binding might choose to specify secondary keymaps for +cases where there is a modifier key such as a Fn key. Proposed names +for said properties are "linux,fn-keymap" or with another descriptive +word for the modifier other from "Fn". + +Example: + linux,keymap = < 0x00030012 + 0x0102003a >; + keypad,num-rows = <2>; + keypad,num-columns = <8>; diff --git a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt new file mode 100644 index 00000000..2995fae7 --- /dev/null +++ b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt @@ -0,0 +1,45 @@ +* Tegra keyboard controller +The key controller has maximum 24 pins to make matrix keypad. Any pin +can be configured as row or column. The maximum column pin can be 8 +and maximum row pins can be 16 for Tegra20/Tegra30. + +Required properties: +- compatible: "nvidia,tegra20-kbc" +- reg: Register base address of KBC. +- interrupts: Interrupt number for the KBC. +- nvidia,kbc-row-pins: The KBC pins which are configured as row. This is an + array of pin numbers which is used as rows. +- nvidia,kbc-col-pins: The KBC pins which are configured as column. This is an + array of pin numbers which is used as column. +- linux,keymap: The keymap for keys as described in the binding document + devicetree/bindings/input/matrix-keymap.txt. + +Optional properties, in addition to those specified by the shared +matrix-keyboard bindings: + +- linux,fn-keymap: a second keymap, same specification as the + matrix-keyboard-controller spec but to be used when the KEY_FN modifier + key is pressed. +- nvidia,debounce-delay-ms: delay in milliseconds per row scan for debouncing +- nvidia,repeat-delay-ms: delay in milliseconds before repeat starts +- nvidia,ghost-filter: enable ghost filtering for this device +- nvidia,wakeup-source: configure keyboard as a wakeup source for suspend/resume + +Example: + +keyboard: keyboard { + compatible = "nvidia,tegra20-kbc"; + reg = <0x7000e200 0x100>; + interrupts = <0 85 0x04>; + nvidia,ghost-filter; + nvidia,debounce-delay-ms = <640>; + nvidia,kbc-row-pins = <0 1 2>; /* pin 0, 1, 2 as rows */ + nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */ + linux,keymap = <0x00000074 + 0x00010067 + 0x00020066 + 0x01010068 + 0x02000069 + 0x02010070 + 0x02020071>; +}; diff --git a/Documentation/devicetree/bindings/input/omap-keypad.txt b/Documentation/devicetree/bindings/input/omap-keypad.txt new file mode 100644 index 00000000..34ed1c60 --- /dev/null +++ b/Documentation/devicetree/bindings/input/omap-keypad.txt @@ -0,0 +1,28 @@ +* TI's Keypad Controller device tree bindings + +TI's 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 one of the following + - "ti,omap4-keypad": For controllers compatible with omap4 keypad + controller. + +Optional Properties specific to linux: +- linux,keypad-no-autorepeat: do no enable autorepeat feature. + +Example: + keypad@4ae1c000{ + compatible = "ti,omap4-keypad"; + keypad,num-rows = <2>; + keypad,num-columns = <8>; + linux,keypad-no-autorepeat; + }; diff --git a/Documentation/devicetree/bindings/input/pwm-beeper.txt b/Documentation/devicetree/bindings/input/pwm-beeper.txt new file mode 100644 index 00000000..be332ae4 --- /dev/null +++ b/Documentation/devicetree/bindings/input/pwm-beeper.txt @@ -0,0 +1,7 @@ +* PWM beeper device tree bindings + +Registers a PWM device as beeper. + +Required properties: +- compatible: should be "pwm-beeper" +- pwms: phandle to the physical PWM device diff --git a/Documentation/devicetree/bindings/input/rotary-encoder.txt b/Documentation/devicetree/bindings/input/rotary-encoder.txt new file mode 100644 index 00000000..33154959 --- /dev/null +++ b/Documentation/devicetree/bindings/input/rotary-encoder.txt @@ -0,0 +1,36 @@ +Rotary encoder DT bindings + +Required properties: +- gpios: a spec for two GPIOs to be used + +Optional properties: +- linux,axis: the input subsystem axis to map to this rotary encoder. + Defaults to 0 (ABS_X / REL_X) +- rotary-encoder,steps: Number of steps in a full turnaround of the + encoder. Only relevant for absolute axis. Defaults to 24 which is a + typical value for such devices. +- rotary-encoder,relative-axis: register a relative axis rather than an + absolute one. Relative axis will only generate +1/-1 events on the input + device, hence no steps need to be passed. +- rotary-encoder,rollover: Automatic rollove when the rotary value becomes + greater than the specified steps or smaller than 0. For absolute axis only. +- rotary-encoder,half-period: Makes the driver work on half-period mode. + +See Documentation/input/rotary-encoder.txt for more information. + +Example: + + rotary@0 { + compatible = "rotary-encoder"; + gpios = <&gpio 19 1>, <&gpio 20 0>; /* GPIO19 is inverted */ + linux,axis = <0>; /* REL_X */ + rotary-encoder,relative-axis; + }; + + rotary@1 { + compatible = "rotary-encoder"; + gpios = <&gpio 21 0>, <&gpio 22 0>; + linux,axis = <1>; /* ABS_Y */ + rotary-encoder,steps = <24>; + rotary-encoder,rollover; + }; diff --git a/Documentation/devicetree/bindings/input/samsung-keypad.txt b/Documentation/devicetree/bindings/input/samsung-keypad.txt new file mode 100644 index 00000000..ce3e394c --- /dev/null +++ b/Documentation/devicetree/bindings/input/samsung-keypad.txt @@ -0,0 +1,88 @@ +* Samsung's Keypad Controller device tree bindings + +Samsung's 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. + +Required SoC Specific Properties: +- compatible: should be one of the following + - "samsung,s3c6410-keypad": For controllers compatible with s3c6410 keypad + controller. + - "samsung,s5pv210-keypad": For controllers compatible with s5pv210 keypad + controller. + +- reg: physical base address of the controller and length of memory mapped + region. + +- interrupts: The interrupt number to the cpu. + +Required Board Specific Properties: +- samsung,keypad-num-rows: Number of row lines connected to the keypad + controller. + +- samsung,keypad-num-columns: Number of column lines connected to the + keypad controller. + +- row-gpios: List of gpios used as row lines. The gpio specifier for + this property depends on the gpio controller to which these row lines + are connected. + +- col-gpios: List of gpios used as column lines. The gpio specifier for + this property depends on the gpio controller to which these column + lines are connected. + +- Keys represented as child nodes: Each key connected to the keypad + controller is represented as a child node to the keypad controller + device node and should include the following properties. + - keypad,row: the row number to which the key is connected. + - keypad,column: the column number to which the key is connected. + - linux,code: the key-code to be reported when the key is pressed + and released. + +Optional Properties specific to linux: +- linux,keypad-no-autorepeat: do no enable autorepeat feature. +- linux,keypad-wakeup: use any event on keypad as wakeup event. + + +Example: + keypad@100A0000 { + compatible = "samsung,s5pv210-keypad"; + reg = <0x100A0000 0x100>; + interrupts = <173>; + samsung,keypad-num-rows = <2>; + samsung,keypad-num-columns = <8>; + linux,input-no-autorepeat; + linux,input-wakeup; + + row-gpios = <&gpx2 0 3 3 0 + &gpx2 1 3 3 0>; + + col-gpios = <&gpx1 0 3 0 0 + &gpx1 1 3 0 0 + &gpx1 2 3 0 0 + &gpx1 3 3 0 0 + &gpx1 4 3 0 0 + &gpx1 5 3 0 0 + &gpx1 6 3 0 0 + &gpx1 7 3 0 0>; + + key_1 { + keypad,row = <0>; + keypad,column = <3>; + linux,code = <2>; + }; + + key_2 { + keypad,row = <0>; + keypad,column = <4>; + linux,code = <3>; + }; + + key_3 { + keypad,row = <0>; + keypad,column = <5>; + linux,code = <4>; + }; + }; diff --git a/Documentation/devicetree/bindings/input/spear-keyboard.txt b/Documentation/devicetree/bindings/input/spear-keyboard.txt new file mode 100644 index 00000000..4a846d26 --- /dev/null +++ b/Documentation/devicetree/bindings/input/spear-keyboard.txt @@ -0,0 +1,20 @@ +* SPEAr keyboard controller + +Required properties: +- compatible: "st,spear300-kbd" + +Optional properties, in addition to those specified by the shared +matrix-keyboard bindings: +- autorepeat: bool: enables key autorepeat +- st,mode: keyboard mode: 0 - 9x9, 1 - 6x6, 2 - 2x2 + +Example: + +kbd@fc400000 { + compatible = "st,spear300-kbd"; + reg = <0xfc400000 0x100>; + linux,keymap = < 0x00030012 + 0x0102003a >; + autorepeat; + st,mode = <0>; +}; diff --git a/Documentation/devicetree/bindings/input/stmpe-keypad.txt b/Documentation/devicetree/bindings/input/stmpe-keypad.txt new file mode 100644 index 00000000..1b97222e --- /dev/null +++ b/Documentation/devicetree/bindings/input/stmpe-keypad.txt @@ -0,0 +1,39 @@ +* STMPE Keypad + +Required properties: + - compatible : "st,stmpe-keypad" + - linux,keymap : See ./matrix-keymap.txt + +Optional properties: + - debounce-interval : Debouncing interval time in milliseconds + - st,scan-count : Scanning cycles elapsed before key data is updated + - st,no-autorepeat : If specified device will not autorepeat + +Example: + + stmpe_keypad { + compatible = "st,stmpe-keypad"; + + debounce-interval = <64>; + st,scan-count = <8>; + st,no-autorepeat; + + linux,keymap = <0x205006b + 0x4010074 + 0x3050072 + 0x1030004 + 0x502006a + 0x500000a + 0x5008b + 0x706001c + 0x405000b + 0x6070003 + 0x3040067 + 0x303006c + 0x60400e7 + 0x602009e + 0x4020073 + 0x5050002 + 0x4030069 + 0x3020008>; + }; diff --git a/Documentation/devicetree/bindings/input/tca8418_keypad.txt b/Documentation/devicetree/bindings/input/tca8418_keypad.txt new file mode 100644 index 00000000..25518500 --- /dev/null +++ b/Documentation/devicetree/bindings/input/tca8418_keypad.txt @@ -0,0 +1,10 @@ +This binding is based on the matrix-keymap binding with the following +changes: + +keypad,num-rows and keypad,num-columns are required. + +Required properties: +- compatible: "ti,tca8418" +- reg: the I2C address +- interrupts: IRQ line number, should trigger on falling edge +- linux,keymap: Keys definitions, see keypad-matrix. diff --git a/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt b/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt new file mode 100644 index 00000000..ca5a2c86 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt @@ -0,0 +1,28 @@ +* Rohm BU21013 Touch Screen + +Required properties: + - compatible : "rohm,bu21013_tp" + - reg : I2C device address + +Optional properties: + - touch-gpio : GPIO pin registering a touch event + - <supply_name>-supply : Phandle to a regulator supply + - rohm,touch-max-x : Maximum outward permitted limit in the X axis + - rohm,touch-max-y : Maximum outward permitted limit in the Y axis + - rohm,flip-x : Flip touch coordinates on the X axis + - rohm,flip-y : Flip touch coordinates on the Y axis + +Example: + + i2c@80110000 { + bu21013_tp@0x5c { + compatible = "rohm,bu21013_tp"; + reg = <0x5c>; + touch-gpio = <&gpio2 20 0x4>; + avdd-supply = <&ab8500_ldo_aux1_reg>; + + rohm,touch-max-x = <384>; + rohm,touch-max-y = <704>; + rohm,flip-y; + }; + }; diff --git a/Documentation/devicetree/bindings/input/touchscreen/egalax-ts.txt b/Documentation/devicetree/bindings/input/touchscreen/egalax-ts.txt new file mode 100644 index 00000000..df70318a --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/egalax-ts.txt @@ -0,0 +1,19 @@ +* EETI eGalax Multiple Touch Controller + +Required properties: +- compatible: must be "eeti,egalax_ts" +- reg: i2c slave address +- interrupt-parent: the phandle for the interrupt controller +- interrupts: touch controller interrupt +- wakeup-gpios: the gpio pin to be used for waking up the controller + as well as uased as irq pin + +Example: + + egalax_ts@04 { + compatible = "eeti,egalax_ts"; + reg = <0x04>; + interrupt-parent = <&gpio1>; + interrupts = <9 2>; + wakeup-gpios = <&gpio1 9 0>; + }; diff --git a/Documentation/devicetree/bindings/input/touchscreen/lpc32xx-tsc.txt b/Documentation/devicetree/bindings/input/touchscreen/lpc32xx-tsc.txt new file mode 100644 index 00000000..41cbf4b7 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/lpc32xx-tsc.txt @@ -0,0 +1,16 @@ +* NXP LPC32xx SoC Touchscreen Controller (TSC) + +Required properties: +- compatible: must be "nxp,lpc3220-tsc" +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: The TSC/ADC interrupt + +Example: + + tsc@40048000 { + compatible = "nxp,lpc3220-tsc"; + reg = <0x40048000 0x1000>; + interrupt-parent = <&mic>; + interrupts = <39 0>; + }; diff --git a/Documentation/devicetree/bindings/input/touchscreen/mms114.txt b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt new file mode 100644 index 00000000..89d4c56c --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/mms114.txt @@ -0,0 +1,34 @@ +* MELFAS MMS114 touchscreen controller + +Required properties: +- compatible: must be "melfas,mms114" +- reg: I2C address of the chip +- interrupts: interrupt to which the chip is connected +- x-size: horizontal resolution of touchscreen +- y-size: vertical resolution of touchscreen + +Optional properties: +- contact-threshold: +- moving-threshold: +- x-invert: invert X axis +- y-invert: invert Y axis + +Example: + + i2c@00000000 { + /* ... */ + + touchscreen@48 { + compatible = "melfas,mms114"; + reg = <0x48>; + interrupts = <39 0>; + x-size = <720>; + y-size = <1280>; + contact-threshold = <10>; + moving-threshold = <10>; + x-invert; + y-invert; + }; + + /* ... */ + }; diff --git a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt new file mode 100644 index 00000000..127baa31 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt @@ -0,0 +1,43 @@ +STMPE Touchscreen +---------------- + +Required properties: + - compatible: "st,stmpe-ts" + +Optional properties: +- st,sample-time: ADC converstion time in number of clock. (0 -> 36 clocks, 1 -> + 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks, 4 -> 80 clocks, 5 -> 96 clocks, 6 + -> 144 clocks), recommended is 4. +- st,mod-12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC) +- st,ref-sel: ADC reference source (0 -> internal reference, 1 -> external + reference) +- st,adc-freq: ADC Clock speed (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz) +- st,ave-ctrl: Sample average control (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 + samples, 3 -> 8 samples) +- st,touch-det-delay: Touch detect interrupt delay (0 -> 10 us, 1 -> 50 us, 2 -> + 100 us, 3 -> 500 us, 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms) recommended + is 3 +- st,settling: Panel driver settling time (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 + -> 1 ms, 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms) recommended is 2 +- st,fraction-z: Length of the fractional part in z (fraction-z ([0..7]) = Count of + the fractional part) recommended is 7 +- st,i-drive: current limit value of the touchscreen drivers (0 -> 20 mA typical 35 + mA max, 1 -> 50 mA typical 80 mA max) + +Node name must be stmpe_touchscreen and should be child node of stmpe node to +which it belongs. + +Example: + + stmpe_touchscreen { + compatible = "st,stmpe-ts"; + st,sample-time = <4>; + st,mod-12b = <1>; + st,ref-sel = <0>; + st,adc-freq = <1>; + st,ave-ctrl = <1>; + st,touch-det-delay = <2>; + st,settling = <2>; + st,fraction-z = <7>; + st,i-drive = <1>; + }; |