[PATCH V1 2/3] Documentation: devicetree: input: new binding for da7280

Roy Im
2018-08-16T02:56:17Z

Add device tree binding information for DA7280 haptic driver.
Example bindings for DA7280 are added.

Signed-off-by: Roy Im <roy.im.opensource@diasemi.com>

---

.../devicetree/bindings/input/dlg,da7280.txt | 91 ++++++++++++++++++++
1 file changed, 91 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/dlg,da7280.txt

diff --git a/Documentation/devicetree/bindings/input/dlg,da7280.txt b/Documentation/devicetree/bindings/input/dlg,da7280.txt
new file mode 100644
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@@ -0,0 +1,91 @@
+Dialog Semiconductor DA7280 Haptics bindings
+
+Required properties:
+- compatible: Should be "dlg,da7280".
+- reg: Specifies the I2C slave address.
+
+- interrupt-parent : Specifies the phandle of the interrupt controller to
+ which the IRQs from DA7280 are delivered to.
+- interrupts: IRQ line info for DA7280.
+ (See Documentation/devicetree/bindings/interrupt-controller/
+ interrupts.txt for further information relating to interrupt properties)
+- dlg,vib-mode:
+ "LRA-MODE" - Linear Resonance Actuator mode.
+ "ERM-BAR" - Bar type Eccentric Rotating Mass mode.
+ "ERM-COIN" - Coin type Eccentric Rotating Mass mode.
+- dlg,play-mode: choose one in below five modes.
+ "DRO-MODE" - Direct register override mode.
+ "PWM-MODE" - PWM data source mode.
+ In this case, user is able to set duty to 0 ~ 0xffff(0% ~ 100%)
+ "RTWM-MODE" - Register triggered waveform memory mode.
+ In this case, when enable this mode the pattern assigned
+ to the PS_SEQ_ID will be played as much times as PS_SEQ_LOOP.
+ "ETWM-MODE" - Edge triggered waveform memory mode.
+ In this case, external GPI(N) control are required to enable/disable
+ and it needs to keep device enabled by sending magnitude (X > 0)
+ the pattern assigned to the GPI(N)_SEQUENCE_ID below.
+ For more details, please see the datasheet.
+- dlg,nom-microvolt: Nominal actuator voltage rating.
+- dlg,abs-max-microvolt: Absolute actuator maximum voltage rating.
+- dlg,imax-microamp: Actuator max current rating.
+- dlg,impd-micro-ohms: the impedance of the actuator in micro ohm,
+ as read from its datasheet.
+
+Optional properties:
+- pwms : phandle to the physical PWM(Pulse Width Modulation) device.
+ PWM properties should be named "pwms". And number of cell is different
+ for each pwm device.
+ (See Documentation/devicetree/bindings/pwm/pwm.txt
+ for further information relating to pwm properties)
+- dlg,ps-seq-id: the PS_SEQ_ID(pattern ID in waveform memory inside chip)
+ to play back when RTWM-MODE is enabled.
+- dlg,ps-seq-loop: the PS_SEQ_LOOP, Number of times the pre-stored sequence
+ pointed to by PS_SEQ_ID or GPI(N)_SEQUENCE_ID is repeated.
+- dlg,gpiN-seq-id: the GPI(N)_SEQUENCE_ID, pattern to play
+ when gpi0 is triggered, 'N' must be 0~2.
+- dlg,gpiN-mode: the pattern mode which can select either
+ "Single-pattern" or "Multi-pattern", 'N' must be 0~2.
+- dlg,gpiN-polarity: gpiN polarity which can be chosen among "Rising-edge",
+ "Falling-edge" and "Both-edge", 'N' must be 0~2.
+ Haptic will work by this edge option in case of ETWM-MODE.
+
+- dlg,resonant-freq-hz: use in case of LRA-MODE, default 205Hz.
+ the freq range: 50Hz ~ 300Hz.
+ It will be set to 205Hz if the value is out of range.
+- dlg,bemf-sens-enable: Enable for internal loop computations.
+- dlg,freq-track-enable: Enable for resonant frequency tracking.
+- dlg,acc-enable: Enable for active acceleration.
+- dlg,rapid-stop-enable: Enable for rapid stop.
+- dlg,amp-pid-enable: Enable for the amplitude PID.
+- dlg,mem-array: use in case that memory registers should be updated,
+ Please fill the whole buffers(100 bytes) to avoid any error in driver.
+ For example,
+ dlg,mem-array = <
+ 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A
+ ...
+ 0x71 0x72 0x73 0x74 0x75 0x76 0x77 0x78 0x79 0x7A
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ >;
+
+For further information, see device datasheet.
+
+======
+
+Example:
+
+ haptics: da7280-haptics@4A {
+ compatible = "dlg,da7280";
+ reg = <0x4A>;
+ interrupt-parent = <&gpio6>;
+ interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
+ dlg,vib-mode = "LRA-MODE";
+ dlg,play-mode = "DRO-MODE";
+ dlg,nom-microvolt = <2000000>;
+ dlg,abs-max-microvolt = <2000000>;
+ dlg,imax-microamp = <170000>;
+ dlg,resonant-freq-hz = <180>;
+ dlg,impd-micro-ohms = <10500000>;
+ dlg,freq-track-enable;
+ dlg,rapid-stop-enable;
+ };