[deliverable/linux.git] / drivers / input / misc / max77693-haptic.c

/*
 * MAXIM MAX77693/MAX77843 Haptic device driver
 *
 * Copyright (C) 2014,2015 Samsung Electronics
 * Jaewon Kim <jaewon02.kim@samsung.com>
 * Krzysztof Kozlowski <krzk@kernel.org>
 *
 * This program is not provided / owned by Maxim Integrated Products.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/err.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/regulator/consumer.h>
#include <linux/mfd/max77693.h>
#include <linux/mfd/max77693-common.h>
#include <linux/mfd/max77693-private.h>
#include <linux/mfd/max77843-private.h>

#define MAX_MAGNITUDE_SHIFT	16

enum max77693_haptic_motor_type {
	MAX77693_HAPTIC_ERM = 0,
	MAX77693_HAPTIC_LRA,
};

enum max77693_haptic_pulse_mode {
	MAX77693_HAPTIC_EXTERNAL_MODE = 0,
	MAX77693_HAPTIC_INTERNAL_MODE,
};

enum max77693_haptic_pwm_divisor {
	MAX77693_HAPTIC_PWM_DIVISOR_32 = 0,
	MAX77693_HAPTIC_PWM_DIVISOR_64,
	MAX77693_HAPTIC_PWM_DIVISOR_128,
	MAX77693_HAPTIC_PWM_DIVISOR_256,
};

struct max77693_haptic {
	enum max77693_types dev_type;

	struct regmap *regmap_pmic;
	struct regmap *regmap_haptic;
	struct device *dev;
	struct input_dev *input_dev;
	struct pwm_device *pwm_dev;
	struct regulator *motor_reg;

	bool enabled;
	bool suspend_state;
	unsigned int magnitude;
	unsigned int pwm_duty;
	enum max77693_haptic_motor_type type;
	enum max77693_haptic_pulse_mode mode;

	struct work_struct work;
};

static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic)
{
	struct pwm_args pargs;
	int delta;
	int error;

	pwm_get_args(haptic->pwm_dev, &pargs);
	delta = (pargs.period + haptic->pwm_duty) / 2;
	error = pwm_config(haptic->pwm_dev, delta, pargs.period);
	if (error) {
		dev_err(haptic->dev, "failed to configure pwm: %d\n", error);
		return error;
	}

	return 0;
}

static int max77843_haptic_bias(struct max77693_haptic *haptic, bool on)
{
	int error;

	if (haptic->dev_type != TYPE_MAX77843)
		return 0;

	error = regmap_update_bits(haptic->regmap_haptic,
				   MAX77843_SYS_REG_MAINCTRL1,
				   MAX77843_MAINCTRL1_BIASEN_MASK,
				   on << MAINCTRL1_BIASEN_SHIFT);
	if (error) {
		dev_err(haptic->dev, "failed to %s bias: %d\n",
			on ? "enable" : "disable", error);
		return error;
	}

	return 0;
}

static int max77693_haptic_configure(struct max77693_haptic *haptic,
				     bool enable)
{
	unsigned int value, config_reg;
	int error;

	switch (haptic->dev_type) {
	case TYPE_MAX77693:
		value = ((haptic->type << MAX77693_CONFIG2_MODE) |
			(enable << MAX77693_CONFIG2_MEN) |
			(haptic->mode << MAX77693_CONFIG2_HTYP) |
			MAX77693_HAPTIC_PWM_DIVISOR_128);
		config_reg = MAX77693_HAPTIC_REG_CONFIG2;
		break;
	case TYPE_MAX77843:
		value = (haptic->type << MCONFIG_MODE_SHIFT) |
			(enable << MCONFIG_MEN_SHIFT) |
			MAX77693_HAPTIC_PWM_DIVISOR_128;
		config_reg = MAX77843_HAP_REG_MCONFIG;
		break;
	default:
		return -EINVAL;
	}

	error = regmap_write(haptic->regmap_haptic,
			     config_reg, value);
	if (error) {
		dev_err(haptic->dev,
			"failed to update haptic config: %d\n", error);
		return error;
	}

	return 0;
}

static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable)
{
	int error;

	if (haptic->dev_type != TYPE_MAX77693)
		return 0;

	error = regmap_update_bits(haptic->regmap_pmic,
				   MAX77693_PMIC_REG_LSCNFG,
				   MAX77693_PMIC_LOW_SYS_MASK,
				   enable << MAX77693_PMIC_LOW_SYS_SHIFT);
	if (error) {
		dev_err(haptic->dev, "cannot update pmic regmap: %d\n", error);
		return error;
	}

	return 0;
}

static void max77693_haptic_enable(struct max77693_haptic *haptic)
{
	int error;

	if (haptic->enabled)
		return;

	error = pwm_enable(haptic->pwm_dev);
	if (error) {
		dev_err(haptic->dev,
			"failed to enable haptic pwm device: %d\n", error);
		return;
	}

	error = max77693_haptic_lowsys(haptic, true);
	if (error)
		goto err_enable_lowsys;

	error = max77693_haptic_configure(haptic, true);
	if (error)
		goto err_enable_config;

	haptic->enabled = true;

	return;

err_enable_config:
	max77693_haptic_lowsys(haptic, false);
err_enable_lowsys:
	pwm_disable(haptic->pwm_dev);
}

static void max77693_haptic_disable(struct max77693_haptic *haptic)
{
	int error;

	if (!haptic->enabled)
		return;

	error = max77693_haptic_configure(haptic, false);
	if (error)
		return;

	error = max77693_haptic_lowsys(haptic, false);
	if (error)
		goto err_disable_lowsys;

	pwm_disable(haptic->pwm_dev);
	haptic->enabled = false;

	return;

err_disable_lowsys:
	max77693_haptic_configure(haptic, true);
}

static void max77693_haptic_play_work(struct work_struct *work)
{
	struct max77693_haptic *haptic =
			container_of(work, struct max77693_haptic, work);
	int error;

	error = max77693_haptic_set_duty_cycle(haptic);
	if (error) {
		dev_err(haptic->dev, "failed to set duty cycle: %d\n", error);
		return;
	}

	if (haptic->magnitude)
		max77693_haptic_enable(haptic);
	else
		max77693_haptic_disable(haptic);
}

static int max77693_haptic_play_effect(struct input_dev *dev, void *data,
				       struct ff_effect *effect)
{
	struct max77693_haptic *haptic = input_get_drvdata(dev);
	struct pwm_args pargs;
	u64 period_mag_multi;

	haptic->magnitude = effect->u.rumble.strong_magnitude;
	if (!haptic->magnitude)
		haptic->magnitude = effect->u.rumble.weak_magnitude;

	/*
	 * The magnitude comes from force-feedback interface.
	 * The formula to convert magnitude to pwm_duty as follows:
	 * - pwm_duty = (magnitude * pwm_period) / MAX_MAGNITUDE(0xFFFF)
	 */
	pwm_get_args(haptic->pwm_dev, &pargs);
	period_mag_multi = (u64)pargs.period * haptic->magnitude;
	haptic->pwm_duty = (unsigned int)(period_mag_multi >>
						MAX_MAGNITUDE_SHIFT);

	schedule_work(&haptic->work);

	return 0;
}

static int max77693_haptic_open(struct input_dev *dev)
{
	struct max77693_haptic *haptic = input_get_drvdata(dev);
	int error;

	error = max77843_haptic_bias(haptic, true);
	if (error)
		return error;

	error = regulator_enable(haptic->motor_reg);
	if (error) {
		dev_err(haptic->dev,
			"failed to enable regulator: %d\n", error);
		return error;
	}

	return 0;
}

static void max77693_haptic_close(struct input_dev *dev)
{
	struct max77693_haptic *haptic = input_get_drvdata(dev);
	int error;

	cancel_work_sync(&haptic->work);
	max77693_haptic_disable(haptic);

	error = regulator_disable(haptic->motor_reg);
	if (error)
		dev_err(haptic->dev,
			"failed to disable regulator: %d\n", error);

	max77843_haptic_bias(haptic, false);
}

static int max77693_haptic_probe(struct platform_device *pdev)
{
	struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
	struct max77693_haptic *haptic;
	int error;

	haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL);
	if (!haptic)
		return -ENOMEM;

	haptic->regmap_pmic = max77693->regmap;
	haptic->dev = &pdev->dev;
	haptic->type = MAX77693_HAPTIC_LRA;
	haptic->mode = MAX77693_HAPTIC_EXTERNAL_MODE;
	haptic->suspend_state = false;

	/* Variant-specific init */
	haptic->dev_type = platform_get_device_id(pdev)->driver_data;
	switch (haptic->dev_type) {
	case TYPE_MAX77693:
		haptic->regmap_haptic = max77693->regmap_haptic;
		break;
	case TYPE_MAX77843:
		haptic->regmap_haptic = max77693->regmap;
		break;
	default:
		dev_err(&pdev->dev, "unsupported device type: %u\n",
			haptic->dev_type);
		return -EINVAL;
	}

	INIT_WORK(&haptic->work, max77693_haptic_play_work);

	/* Get pwm and regulatot for haptic device */
	haptic->pwm_dev = devm_pwm_get(&pdev->dev, NULL);
	if (IS_ERR(haptic->pwm_dev)) {
		dev_err(&pdev->dev, "failed to get pwm device\n");
		return PTR_ERR(haptic->pwm_dev);
	}

	/*
	 * FIXME: pwm_apply_args() should be removed when switching to the
	 * atomic PWM API.
	 */
	pwm_apply_args(haptic->pwm_dev);

	haptic->motor_reg = devm_regulator_get(&pdev->dev, "haptic");
	if (IS_ERR(haptic->motor_reg)) {
		dev_err(&pdev->dev, "failed to get regulator\n");
		return PTR_ERR(haptic->motor_reg);
	}

	/* Initialize input device for haptic device */
	haptic->input_dev = devm_input_allocate_device(&pdev->dev);
	if (!haptic->input_dev) {
		dev_err(&pdev->dev, "failed to allocate input device\n");
		return -ENOMEM;
	}

	haptic->input_dev->name = "max77693-haptic";
	haptic->input_dev->id.version = 1;
	haptic->input_dev->dev.parent = &pdev->dev;
	haptic->input_dev->open = max77693_haptic_open;
	haptic->input_dev->close = max77693_haptic_close;
	input_set_drvdata(haptic->input_dev, haptic);
	input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE);

	error = input_ff_create_memless(haptic->input_dev, NULL,
				max77693_haptic_play_effect);
	if (error) {
		dev_err(&pdev->dev, "failed to create force-feedback\n");
		return error;
	}

	error = input_register_device(haptic->input_dev);
	if (error) {
		dev_err(&pdev->dev, "failed to register input device\n");
		return error;
	}

	platform_set_drvdata(pdev, haptic);

	return 0;
}

static int __maybe_unused max77693_haptic_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct max77693_haptic *haptic = platform_get_drvdata(pdev);

	if (haptic->enabled) {
		max77693_haptic_disable(haptic);
		haptic->suspend_state = true;
	}

	return 0;
}

static int __maybe_unused max77693_haptic_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct max77693_haptic *haptic = platform_get_drvdata(pdev);

	if (haptic->suspend_state) {
		max77693_haptic_enable(haptic);
		haptic->suspend_state = false;
	}

	return 0;
}

static SIMPLE_DEV_PM_OPS(max77693_haptic_pm_ops,
			 max77693_haptic_suspend, max77693_haptic_resume);

static const struct platform_device_id max77693_haptic_id[] = {
	{ "max77693-haptic", TYPE_MAX77693 },
	{ "max77843-haptic", TYPE_MAX77843 },
	{},
};
MODULE_DEVICE_TABLE(platform, max77693_haptic_id);

static struct platform_driver max77693_haptic_driver = {
	.driver		= {
		.name	= "max77693-haptic",
		.pm	= &max77693_haptic_pm_ops,
	},
	.probe		= max77693_haptic_probe,
	.id_table	= max77693_haptic_id,
};
module_platform_driver(max77693_haptic_driver);

MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
MODULE_DESCRIPTION("MAXIM 77693/77843 Haptic driver");
MODULE_ALIAS("platform:max77693-haptic");
MODULE_LICENSE("GPL");
Commit	Line	Data
a3b3ca75	1	/*
56bbc99e	2	* MAXIM MAX77693/MAX77843 Haptic device driver
a3b3ca75	3	*
56bbc99e	4	* Copyright (C) 2014,2015 Samsung Electronics
a3b3ca75	5	* Jaewon Kim <jaewon02.kim@samsung.com>
3f5c5920	6	* Krzysztof Kozlowski <krzk@kernel.org>
a3b3ca75 JK	7	*
	8	* This program is not provided / owned by Maxim Integrated Products.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*/
	15
	16	#include <linux/err.h>
	17	#include <linux/init.h>
	18	#include <linux/i2c.h>
	19	#include <linux/regmap.h>
	20	#include <linux/input.h>
	21	#include <linux/module.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/pwm.h>
	24	#include <linux/slab.h>
	25	#include <linux/workqueue.h>
	26	#include <linux/regulator/consumer.h>
	27	#include <linux/mfd/max77693.h>
61b305cd	28	#include <linux/mfd/max77693-common.h>
a3b3ca75	29	#include <linux/mfd/max77693-private.h>
56bbc99e	30	#include <linux/mfd/max77843-private.h>
a3b3ca75 JK	31
	32	#define MAX_MAGNITUDE_SHIFT 16
	33
	34	enum max77693_haptic_motor_type {
	35	MAX77693_HAPTIC_ERM = 0,
	36	MAX77693_HAPTIC_LRA,
	37	};
	38
	39	enum max77693_haptic_pulse_mode {
	40	MAX77693_HAPTIC_EXTERNAL_MODE = 0,
	41	MAX77693_HAPTIC_INTERNAL_MODE,
	42	};
	43
	44	enum max77693_haptic_pwm_divisor {
	45	MAX77693_HAPTIC_PWM_DIVISOR_32 = 0,
	46	MAX77693_HAPTIC_PWM_DIVISOR_64,
	47	MAX77693_HAPTIC_PWM_DIVISOR_128,
	48	MAX77693_HAPTIC_PWM_DIVISOR_256,
	49	};
	50
	51	struct max77693_haptic {
6eaa247a KK	52	enum max77693_types dev_type;
6eaa247a KK	53
a3b3ca75 JK	54	struct regmap *regmap_pmic;
	55	struct regmap *regmap_haptic;
	56	struct device *dev;
	57	struct input_dev *input_dev;
	58	struct pwm_device *pwm_dev;
	59	struct regulator *motor_reg;
	60
	61	bool enabled;
	62	bool suspend_state;
	63	unsigned int magnitude;
	64	unsigned int pwm_duty;
	65	enum max77693_haptic_motor_type type;
	66	enum max77693_haptic_pulse_mode mode;
a3b3ca75 JK	67
	68	struct work_struct work;
	69	};
	70
	71	static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic)
	72	{
ad4e9fec BB	73	struct pwm_args pargs;
ad4e9fec BB	74	int delta;
a3b3ca75 JK	75	int error;
a3b3ca75 JK	76
ad4e9fec BB	77	pwm_get_args(haptic->pwm_dev, &pargs);
	78	delta = (pargs.period + haptic->pwm_duty) / 2;
	79	error = pwm_config(haptic->pwm_dev, delta, pargs.period);
a3b3ca75 JK	80	if (error) {
	81	dev_err(haptic->dev, "failed to configure pwm: %d\n", error);
	82	return error;
	83	}
	84
	85	return 0;
	86	}
	87
56bbc99e KK	88	static int max77843_haptic_bias(struct max77693_haptic *haptic, bool on)
	89	{
	90	int error;
	91
	92	if (haptic->dev_type != TYPE_MAX77843)
	93	return 0;
	94
	95	error = regmap_update_bits(haptic->regmap_haptic,
	96	MAX77843_SYS_REG_MAINCTRL1,
	97	MAX77843_MAINCTRL1_BIASEN_MASK,
	98	on << MAINCTRL1_BIASEN_SHIFT);
	99	if (error) {
	100	dev_err(haptic->dev, "failed to %s bias: %d\n",
	101	on ? "enable" : "disable", error);
	102	return error;
	103	}
	104
	105	return 0;
	106	}
	107
a3b3ca75 JK	108	static int max77693_haptic_configure(struct max77693_haptic *haptic,
	109	bool enable)
	110	{
6eaa247a	111	unsigned int value, config_reg;
a3b3ca75 JK	112	int error;
a3b3ca75 JK	113
6eaa247a KK	114	switch (haptic->dev_type) {
	115	case TYPE_MAX77693:
	116	value = ((haptic->type << MAX77693_CONFIG2_MODE) \|
	117	(enable << MAX77693_CONFIG2_MEN) \|
	118	(haptic->mode << MAX77693_CONFIG2_HTYP) \|
	119	MAX77693_HAPTIC_PWM_DIVISOR_128);
	120	config_reg = MAX77693_HAPTIC_REG_CONFIG2;
	121	break;
56bbc99e KK	122	case TYPE_MAX77843:
	123	value = (haptic->type << MCONFIG_MODE_SHIFT) \|
	124	(enable << MCONFIG_MEN_SHIFT) \|
	125	MAX77693_HAPTIC_PWM_DIVISOR_128;
	126	config_reg = MAX77843_HAP_REG_MCONFIG;
	127	break;
6eaa247a KK	128	default:
	129	return -EINVAL;
	130	}
a3b3ca75 JK	131
a3b3ca75 JK	132	error = regmap_write(haptic->regmap_haptic,
6eaa247a	133	config_reg, value);
a3b3ca75 JK	134	if (error) {
	135	dev_err(haptic->dev,
	136	"failed to update haptic config: %d\n", error);
	137	return error;
	138	}
	139
	140	return 0;
	141	}
	142
	143	static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable)
	144	{
	145	int error;
	146
56bbc99e KK	147	if (haptic->dev_type != TYPE_MAX77693)
	148	return 0;
	149
a3b3ca75 JK	150	error = regmap_update_bits(haptic->regmap_pmic,
	151	MAX77693_PMIC_REG_LSCNFG,
	152	MAX77693_PMIC_LOW_SYS_MASK,
	153	enable << MAX77693_PMIC_LOW_SYS_SHIFT);
	154	if (error) {
	155	dev_err(haptic->dev, "cannot update pmic regmap: %d\n", error);
	156	return error;
	157	}
	158
	159	return 0;
	160	}
	161
	162	static void max77693_haptic_enable(struct max77693_haptic *haptic)
	163	{
	164	int error;
	165
	166	if (haptic->enabled)
	167	return;
	168
	169	error = pwm_enable(haptic->pwm_dev);
	170	if (error) {
	171	dev_err(haptic->dev,
	172	"failed to enable haptic pwm device: %d\n", error);
	173	return;
	174	}
	175
	176	error = max77693_haptic_lowsys(haptic, true);
	177	if (error)
	178	goto err_enable_lowsys;
	179
	180	error = max77693_haptic_configure(haptic, true);
	181	if (error)
	182	goto err_enable_config;
	183
	184	haptic->enabled = true;
	185
	186	return;
	187
	188	err_enable_config:
	189	max77693_haptic_lowsys(haptic, false);
	190	err_enable_lowsys:
	191	pwm_disable(haptic->pwm_dev);
	192	}
	193
	194	static void max77693_haptic_disable(struct max77693_haptic *haptic)
	195	{
	196	int error;
	197
135d916f	198	if (!haptic->enabled)
a3b3ca75 JK	199	return;
	200
	201	error = max77693_haptic_configure(haptic, false);
	202	if (error)
	203	return;
	204
	205	error = max77693_haptic_lowsys(haptic, false);
	206	if (error)
	207	goto err_disable_lowsys;
	208
	209	pwm_disable(haptic->pwm_dev);
	210	haptic->enabled = false;
	211
	212	return;
	213
	214	err_disable_lowsys:
	215	max77693_haptic_configure(haptic, true);
	216	}
	217
	218	static void max77693_haptic_play_work(struct work_struct *work)
	219	{
	220	struct max77693_haptic *haptic =
	221	container_of(work, struct max77693_haptic, work);
	222	int error;
	223
	224	error = max77693_haptic_set_duty_cycle(haptic);
	225	if (error) {
	226	dev_err(haptic->dev, "failed to set duty cycle: %d\n", error);
	227	return;
	228	}
	229
	230	if (haptic->magnitude)
	231	max77693_haptic_enable(haptic);
	232	else
	233	max77693_haptic_disable(haptic);
	234	}
	235
	236	static int max77693_haptic_play_effect(struct input_dev dev, void data,
	237	struct ff_effect *effect)
	238	{
	239	struct max77693_haptic *haptic = input_get_drvdata(dev);
ad4e9fec	240	struct pwm_args pargs;
fbefc5e7	241	u64 period_mag_multi;
a3b3ca75 JK	242
	243	haptic->magnitude = effect->u.rumble.strong_magnitude;
	244	if (!haptic->magnitude)
	245	haptic->magnitude = effect->u.rumble.weak_magnitude;
	246
	247	/*
	248	* The magnitude comes from force-feedback interface.
	249	* The formula to convert magnitude to pwm_duty as follows:
	250	* - pwm_duty = (magnitude * pwm_period) / MAX_MAGNITUDE(0xFFFF)
	251	*/
ad4e9fec BB	252	pwm_get_args(haptic->pwm_dev, &pargs);
ad4e9fec BB	253	period_mag_multi = (u64)pargs.period * haptic->magnitude;
a3b3ca75 JK	254	haptic->pwm_duty = (unsigned int)(period_mag_multi >>
	255	MAX_MAGNITUDE_SHIFT);
	256
	257	schedule_work(&haptic->work);
	258
	259	return 0;
	260	}
	261
	262	static int max77693_haptic_open(struct input_dev *dev)
	263	{
	264	struct max77693_haptic *haptic = input_get_drvdata(dev);
	265	int error;
	266
56bbc99e KK	267	error = max77843_haptic_bias(haptic, true);
	268	if (error)
	269	return error;
	270
a3b3ca75 JK	271	error = regulator_enable(haptic->motor_reg);
	272	if (error) {
	273	dev_err(haptic->dev,
	274	"failed to enable regulator: %d\n", error);
	275	return error;
	276	}
	277
	278	return 0;
	279	}
	280
	281	static void max77693_haptic_close(struct input_dev *dev)
	282	{
	283	struct max77693_haptic *haptic = input_get_drvdata(dev);
	284	int error;
	285
	286	cancel_work_sync(&haptic->work);
	287	max77693_haptic_disable(haptic);
	288
	289	error = regulator_disable(haptic->motor_reg);
	290	if (error)
	291	dev_err(haptic->dev,
	292	"failed to disable regulator: %d\n", error);
56bbc99e KK	293
56bbc99e KK	294	max77843_haptic_bias(haptic, false);
a3b3ca75 JK	295	}
	296
	297	static int max77693_haptic_probe(struct platform_device *pdev)
	298	{
	299	struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
	300	struct max77693_haptic *haptic;
	301	int error;
	302
	303	haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL);
	304	if (!haptic)
	305	return -ENOMEM;
	306
	307	haptic->regmap_pmic = max77693->regmap;
a3b3ca75 JK	308	haptic->dev = &pdev->dev;
	309	haptic->type = MAX77693_HAPTIC_LRA;
	310	haptic->mode = MAX77693_HAPTIC_EXTERNAL_MODE;
a3b3ca75 JK	311	haptic->suspend_state = false;
a3b3ca75 JK	312
6eaa247a KK	313	/* Variant-specific init */
	314	haptic->dev_type = platform_get_device_id(pdev)->driver_data;
	315	switch (haptic->dev_type) {
	316	case TYPE_MAX77693:
	317	haptic->regmap_haptic = max77693->regmap_haptic;
	318	break;
56bbc99e KK	319	case TYPE_MAX77843:
	320	haptic->regmap_haptic = max77693->regmap;
	321	break;
6eaa247a KK	322	default:
	323	dev_err(&pdev->dev, "unsupported device type: %u\n",
	324	haptic->dev_type);
	325	return -EINVAL;
	326	}
	327
a3b3ca75 JK	328	INIT_WORK(&haptic->work, max77693_haptic_play_work);
	329
	330	/* Get pwm and regulatot for haptic device */
	331	haptic->pwm_dev = devm_pwm_get(&pdev->dev, NULL);
	332	if (IS_ERR(haptic->pwm_dev)) {
	333	dev_err(&pdev->dev, "failed to get pwm device\n");
	334	return PTR_ERR(haptic->pwm_dev);
	335	}
	336
ad4e9fec BB	337	/*
	338	* FIXME: pwm_apply_args() should be removed when switching to the
	339	* atomic PWM API.
	340	*/
	341	pwm_apply_args(haptic->pwm_dev);
	342
a3b3ca75 JK	343	haptic->motor_reg = devm_regulator_get(&pdev->dev, "haptic");
	344	if (IS_ERR(haptic->motor_reg)) {
	345	dev_err(&pdev->dev, "failed to get regulator\n");
	346	return PTR_ERR(haptic->motor_reg);
	347	}
	348
	349	/* Initialize input device for haptic device */
	350	haptic->input_dev = devm_input_allocate_device(&pdev->dev);
	351	if (!haptic->input_dev) {
	352	dev_err(&pdev->dev, "failed to allocate input device\n");
	353	return -ENOMEM;
	354	}
	355
	356	haptic->input_dev->name = "max77693-haptic";
	357	haptic->input_dev->id.version = 1;
	358	haptic->input_dev->dev.parent = &pdev->dev;
	359	haptic->input_dev->open = max77693_haptic_open;
	360	haptic->input_dev->close = max77693_haptic_close;
	361	input_set_drvdata(haptic->input_dev, haptic);
	362	input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE);
	363
	364	error = input_ff_create_memless(haptic->input_dev, NULL,
	365	max77693_haptic_play_effect);
	366	if (error) {
	367	dev_err(&pdev->dev, "failed to create force-feedback\n");
	368	return error;
	369	}
	370
	371	error = input_register_device(haptic->input_dev);
	372	if (error) {
	373	dev_err(&pdev->dev, "failed to register input device\n");
	374	return error;
	375	}
	376
	377	platform_set_drvdata(pdev, haptic);
	378
	379	return 0;
	380	}
	381
97a652a8	382	static int __maybe_unused max77693_haptic_suspend(struct device *dev)
a3b3ca75 JK	383	{
	384	struct platform_device *pdev = to_platform_device(dev);
	385	struct max77693_haptic *haptic = platform_get_drvdata(pdev);
	386
	387	if (haptic->enabled) {
	388	max77693_haptic_disable(haptic);
	389	haptic->suspend_state = true;
	390	}
	391
	392	return 0;
	393	}
	394
97a652a8	395	static int __maybe_unused max77693_haptic_resume(struct device *dev)
a3b3ca75 JK	396	{
	397	struct platform_device *pdev = to_platform_device(dev);
	398	struct max77693_haptic *haptic = platform_get_drvdata(pdev);
	399
	400	if (haptic->suspend_state) {
	401	max77693_haptic_enable(haptic);
	402	haptic->suspend_state = false;
	403	}
	404
	405	return 0;
	406	}
a3b3ca75 JK	407
	408	static SIMPLE_DEV_PM_OPS(max77693_haptic_pm_ops,
	409	max77693_haptic_suspend, max77693_haptic_resume);
	410
6eaa247a KK	411	static const struct platform_device_id max77693_haptic_id[] = {
6eaa247a KK	412	{ "max77693-haptic", TYPE_MAX77693 },
56bbc99e	413	{ "max77843-haptic", TYPE_MAX77843 },
6eaa247a KK	414	{},
	415	};
	416	MODULE_DEVICE_TABLE(platform, max77693_haptic_id);
	417
a3b3ca75 JK	418	static struct platform_driver max77693_haptic_driver = {
	419	.driver = {
	420	.name = "max77693-haptic",
a3b3ca75 JK	421	.pm = &max77693_haptic_pm_ops,
	422	},
	423	.probe = max77693_haptic_probe,
6eaa247a	424	.id_table = max77693_haptic_id,
a3b3ca75 JK	425	};
	426	module_platform_driver(max77693_haptic_driver);
	427
	428	MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
3f5c5920	429	MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
56bbc99e	430	MODULE_DESCRIPTION("MAXIM 77693/77843 Haptic driver");
a3b3ca75 JK	431	MODULE_ALIAS("platform:max77693-haptic");
a3b3ca75 JK	432	MODULE_LICENSE("GPL");