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Document the Imagis ISA1200 haptic motor driver, used primarily in mobile handheld devices and capable of supporting up to two motors. The exact datasheet for the ISA1200 is not available; all data was modeled based on available downstream kernel sources for various devices and fragments of information scattered across the internet. Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20260617070528.35006-2-clamor95@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
142 lines
3.2 KiB
YAML
142 lines
3.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/imagis,isa1200.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Imagis ISA1200 haptic motor driver
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maintainers:
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- Svyatoslav Ryhel <clamor95@gmail.com>
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- Linus Walleij <linusw@kernel.org>
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description:
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The ISA1200 is a high-performance enhanced haptic motor driver designed
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for mobile hand-held devices. It supports various voltages for both ERM
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(Eccentric Rotating Mass) and LRA (Linear Resonant Actuator) type
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actuators. Thanks to an embedded LDO, battery power can be used directly
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in handheld applications.
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properties:
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compatible:
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const: imagis,isa1200
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reg:
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maxItems: 1
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control-gpios:
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description:
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One or two GPIOs flagged as active high linked to HEN and LEN pins
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minItems: 1
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maxItems: 2
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clocks:
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maxItems: 1
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pwms:
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maxItems: 1
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vdd-supply:
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description:
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Regulator for 2.4V - 5.5V power supply
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vddp-supply:
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description:
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Regulator for 2.4V - 3.6V IO power supply
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imagis,clk-div:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Divider for the external input clock/PWM
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enum: [128, 256, 512, 1024]
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default: 128
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imagis,pll-div:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Divider for the internal PLL clock
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minimum: 1
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maximum: 15
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default: 1
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imagis,mode:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: |
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Defines the motor type isa1200 drives
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0 - LRA (Linear Resonant Actuator)
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1 - ERM (Eccentric Rotating Mass)
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enum: [0, 1]
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default: 0
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imagis,period-ns:
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description:
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Period of the internal PWM channel in nanoseconds.
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minimum: 10000
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maximum: 30000
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imagis,duty-cycle-ns:
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description:
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Duty cycle of the external/internal PWM channel in nanoseconds,
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defaults to 50% of the channel's period
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ldo:
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$ref: /schemas/regulator/regulator.yaml#
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type: object
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description:
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Embedded LDO regulator with voltage range 2.3V - 3.8V
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unevaluatedProperties: false
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required:
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- regulator-min-microvolt
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- regulator-max-microvolt
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required:
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- compatible
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- reg
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- ldo
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oneOf:
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- required:
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- clocks
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- imagis,period-ns
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- required:
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- pwms
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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haptic-engine@49 {
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compatible = "imagis,isa1200";
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reg = <0x49>;
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clocks = <&isa1200_refclk>;
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control-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>,
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<&gpio 23 GPIO_ACTIVE_HIGH>;
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vdd-supply = <&vdd_3v3_vbat>;
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vddp-supply = <&vdd_2v8_vvib>;
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imagis,clk-div = <256>;
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imagis,pll-div = <2>;
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imagis,mode = <0>; /* LRA_MODE */
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imagis,period-ns = <13400>;
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imagis,duty-cycle-ns = <100>;
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ldo {
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regulator-name = "vdd_vib";
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regulator-min-microvolt = <2300000>;
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regulator-max-microvolt = <2300000>;
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};
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};
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};
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