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Subject[RESEND PATCH V6 2/3] dt-bindings: input: Add document bindings for DA7280

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

Reviewed-by: Rob Herring <robh@kernel.org>.

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

---
v6: No changes.
v5: Updated descriptions and fixed errors.
v4: Fixed commit message, properties.
v3: Fixed subject format.
v2: No changes


.../devicetree/bindings/input/dlg,da7280.txt | 105 ++++++++++++++++++++
1 file changed, 105 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
index 0000000..a25a12f
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/dlg,da7280.txt
@@ -0,0 +1,105 @@
+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.
+
+- dlg,actuator-type: Set Actuator type. it should be one of:
+ "LRA" - Linear Resonance Actuator type.
+ "ERM-bar" - Bar type Eccentric Rotating Mass.
+ "ERM-coin" - Coin type Eccentric Rotating Mass.
+
+- dlg,op-mode: Haptic operation mode.
+ Possible values:
+ 1 - Direct register override(DRO) mode triggered by i2c(default),
+ 2 - PWM data source mode controlled by PWM duty,
+ 3 - Register triggered waveform memory(RTWM) mode, the pattern
+ assigned to the PS_SEQ_ID played as much times as PS_SEQ_LOOP,
+ 4 - Edge triggered waveform memory(ETWM) mode, external GPI(N)
+ control are required to enable/disable and it needs to keep
+ device enabled by sending magnitude (X > 0),
+ the pattern is assigned to the GPI(N)_SEQUENCE_ID below.
+ For more details, please see the datasheet.
+
+- dlg,nom-microvolt: Nominal actuator voltage rating.
+ Valid values: 0 - 6000000.
+- dlg,abs-max-microvolt: Absolute actuator maximum voltage rating.
+ Valid values: 0 - 6000000.
+- dlg,imax-microamp: Actuator max current rating.
+ Valid values: 0 - 252000.
+ Default: 130000.
+- dlg,impd-micro-ohms: the impedance of the actuator in micro ohms.
+ Valid values: 0 - 1500000000.
+
+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.
+ Valid range: 0 - 15.
+- 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.
+ Valid range: 0 - 15.
+- dlg,gpiN-seq-id: the GPI(N)_SEQUENCE_ID, pattern to play
+ when gpi0 is triggered, 'N' must be 0 - 2.
+ Valid range: 0 - 15.
+- 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.
+ the frequency range: 50 - 300.
+ Default: 205.
+
+- 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: Customized waveform memory(patterns) data downloaded to
+ the device during initialization. This is an array of 100 values(u8).
+
+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,actuator-type = "LRA";
+ dlg,op-mode = <1>;
+ 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;
+ dlg,mem-array = <
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
+ >;
+
+ };
--
end-of-patch for RESEND PATCH V6
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