[mirror_ubuntu-kernels.git] / drivers / input / misc / max77693-haptic.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * 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.
 */

#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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
a3b3ca75	2	/*
56bbc99e	3	* MAXIM MAX77693/MAX77843 Haptic device driver
a3b3ca75	4	*
56bbc99e	5	* Copyright (C) 2014,2015 Samsung Electronics
a3b3ca75	6	* Jaewon Kim <jaewon02.kim@samsung.com>
3f5c5920	7	* Krzysztof Kozlowski <krzk@kernel.org>
a3b3ca75 JK	8	*
a3b3ca75 JK	9	* This program is not provided / owned by Maxim Integrated Products.
a3b3ca75 JK	10	*/
	11
	12	#include <linux/err.h>
	13	#include <linux/init.h>
	14	#include <linux/i2c.h>
	15	#include <linux/regmap.h>
	16	#include <linux/input.h>
	17	#include <linux/module.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/pwm.h>
	20	#include <linux/slab.h>
	21	#include <linux/workqueue.h>
	22	#include <linux/regulator/consumer.h>
	23	#include <linux/mfd/max77693.h>
61b305cd	24	#include <linux/mfd/max77693-common.h>
a3b3ca75	25	#include <linux/mfd/max77693-private.h>
56bbc99e	26	#include <linux/mfd/max77843-private.h>
a3b3ca75 JK	27
	28	#define MAX_MAGNITUDE_SHIFT 16
	29
	30	enum max77693_haptic_motor_type {
	31	MAX77693_HAPTIC_ERM = 0,
	32	MAX77693_HAPTIC_LRA,
	33	};
	34
	35	enum max77693_haptic_pulse_mode {
	36	MAX77693_HAPTIC_EXTERNAL_MODE = 0,
	37	MAX77693_HAPTIC_INTERNAL_MODE,
	38	};
	39
	40	enum max77693_haptic_pwm_divisor {
	41	MAX77693_HAPTIC_PWM_DIVISOR_32 = 0,
	42	MAX77693_HAPTIC_PWM_DIVISOR_64,
	43	MAX77693_HAPTIC_PWM_DIVISOR_128,
	44	MAX77693_HAPTIC_PWM_DIVISOR_256,
	45	};
	46
	47	struct max77693_haptic {
6eaa247a KK	48	enum max77693_types dev_type;
6eaa247a KK	49
a3b3ca75 JK	50	struct regmap *regmap_pmic;
	51	struct regmap *regmap_haptic;
	52	struct device *dev;
	53	struct input_dev *input_dev;
	54	struct pwm_device *pwm_dev;
	55	struct regulator *motor_reg;
	56
	57	bool enabled;
	58	bool suspend_state;
	59	unsigned int magnitude;
	60	unsigned int pwm_duty;
	61	enum max77693_haptic_motor_type type;
	62	enum max77693_haptic_pulse_mode mode;
a3b3ca75 JK	63
	64	struct work_struct work;
	65	};
	66
	67	static int max77693_haptic_set_duty_cycle(struct max77693_haptic *haptic)
	68	{
ad4e9fec BB	69	struct pwm_args pargs;
ad4e9fec BB	70	int delta;
a3b3ca75 JK	71	int error;
a3b3ca75 JK	72
ad4e9fec BB	73	pwm_get_args(haptic->pwm_dev, &pargs);
	74	delta = (pargs.period + haptic->pwm_duty) / 2;
	75	error = pwm_config(haptic->pwm_dev, delta, pargs.period);
a3b3ca75 JK	76	if (error) {
	77	dev_err(haptic->dev, "failed to configure pwm: %d\n", error);
	78	return error;
	79	}
	80
	81	return 0;
	82	}
	83
56bbc99e KK	84	static int max77843_haptic_bias(struct max77693_haptic *haptic, bool on)
	85	{
	86	int error;
	87
	88	if (haptic->dev_type != TYPE_MAX77843)
	89	return 0;
	90
	91	error = regmap_update_bits(haptic->regmap_haptic,
	92	MAX77843_SYS_REG_MAINCTRL1,
	93	MAX77843_MAINCTRL1_BIASEN_MASK,
	94	on << MAINCTRL1_BIASEN_SHIFT);
	95	if (error) {
	96	dev_err(haptic->dev, "failed to %s bias: %d\n",
	97	on ? "enable" : "disable", error);
	98	return error;
	99	}
	100
	101	return 0;
	102	}
	103
a3b3ca75 JK	104	static int max77693_haptic_configure(struct max77693_haptic *haptic,
	105	bool enable)
	106	{
6eaa247a	107	unsigned int value, config_reg;
a3b3ca75 JK	108	int error;
a3b3ca75 JK	109
6eaa247a KK	110	switch (haptic->dev_type) {
	111	case TYPE_MAX77693:
	112	value = ((haptic->type << MAX77693_CONFIG2_MODE) \|
	113	(enable << MAX77693_CONFIG2_MEN) \|
	114	(haptic->mode << MAX77693_CONFIG2_HTYP) \|
	115	MAX77693_HAPTIC_PWM_DIVISOR_128);
	116	config_reg = MAX77693_HAPTIC_REG_CONFIG2;
	117	break;
56bbc99e KK	118	case TYPE_MAX77843:
	119	value = (haptic->type << MCONFIG_MODE_SHIFT) \|
	120	(enable << MCONFIG_MEN_SHIFT) \|
	121	MAX77693_HAPTIC_PWM_DIVISOR_128;
	122	config_reg = MAX77843_HAP_REG_MCONFIG;
	123	break;
6eaa247a KK	124	default:
	125	return -EINVAL;
	126	}
a3b3ca75 JK	127
a3b3ca75 JK	128	error = regmap_write(haptic->regmap_haptic,
6eaa247a	129	config_reg, value);
a3b3ca75 JK	130	if (error) {
	131	dev_err(haptic->dev,
	132	"failed to update haptic config: %d\n", error);
	133	return error;
	134	}
	135
	136	return 0;
	137	}
	138
	139	static int max77693_haptic_lowsys(struct max77693_haptic *haptic, bool enable)
	140	{
	141	int error;
	142
56bbc99e KK	143	if (haptic->dev_type != TYPE_MAX77693)
	144	return 0;
	145
a3b3ca75 JK	146	error = regmap_update_bits(haptic->regmap_pmic,
	147	MAX77693_PMIC_REG_LSCNFG,
	148	MAX77693_PMIC_LOW_SYS_MASK,
	149	enable << MAX77693_PMIC_LOW_SYS_SHIFT);
	150	if (error) {
	151	dev_err(haptic->dev, "cannot update pmic regmap: %d\n", error);
	152	return error;
	153	}
	154
	155	return 0;
	156	}
	157
	158	static void max77693_haptic_enable(struct max77693_haptic *haptic)
	159	{
	160	int error;
	161
	162	if (haptic->enabled)
	163	return;
	164
	165	error = pwm_enable(haptic->pwm_dev);
	166	if (error) {
	167	dev_err(haptic->dev,
	168	"failed to enable haptic pwm device: %d\n", error);
	169	return;
	170	}
	171
	172	error = max77693_haptic_lowsys(haptic, true);
	173	if (error)
	174	goto err_enable_lowsys;
	175
	176	error = max77693_haptic_configure(haptic, true);
	177	if (error)
	178	goto err_enable_config;
	179
	180	haptic->enabled = true;
	181
	182	return;
	183
	184	err_enable_config:
	185	max77693_haptic_lowsys(haptic, false);
	186	err_enable_lowsys:
	187	pwm_disable(haptic->pwm_dev);
	188	}
	189
	190	static void max77693_haptic_disable(struct max77693_haptic *haptic)
	191	{
	192	int error;
	193
135d916f	194	if (!haptic->enabled)
a3b3ca75 JK	195	return;
	196
	197	error = max77693_haptic_configure(haptic, false);
	198	if (error)
	199	return;
	200
	201	error = max77693_haptic_lowsys(haptic, false);
	202	if (error)
	203	goto err_disable_lowsys;
	204
	205	pwm_disable(haptic->pwm_dev);
	206	haptic->enabled = false;
	207
	208	return;
	209
	210	err_disable_lowsys:
	211	max77693_haptic_configure(haptic, true);
	212	}
	213
	214	static void max77693_haptic_play_work(struct work_struct *work)
	215	{
	216	struct max77693_haptic *haptic =
	217	container_of(work, struct max77693_haptic, work);
	218	int error;
	219
	220	error = max77693_haptic_set_duty_cycle(haptic);
	221	if (error) {
	222	dev_err(haptic->dev, "failed to set duty cycle: %d\n", error);
	223	return;
	224	}
	225
	226	if (haptic->magnitude)
	227	max77693_haptic_enable(haptic);
	228	else
	229	max77693_haptic_disable(haptic);
	230	}
	231
	232	static int max77693_haptic_play_effect(struct input_dev dev, void data,
	233	struct ff_effect *effect)
	234	{
	235	struct max77693_haptic *haptic = input_get_drvdata(dev);
ad4e9fec	236	struct pwm_args pargs;
fbefc5e7	237	u64 period_mag_multi;
a3b3ca75 JK	238
	239	haptic->magnitude = effect->u.rumble.strong_magnitude;
	240	if (!haptic->magnitude)
	241	haptic->magnitude = effect->u.rumble.weak_magnitude;
	242
	243	/*
	244	* The magnitude comes from force-feedback interface.
	245	* The formula to convert magnitude to pwm_duty as follows:
	246	* - pwm_duty = (magnitude * pwm_period) / MAX_MAGNITUDE(0xFFFF)
	247	*/
ad4e9fec BB	248	pwm_get_args(haptic->pwm_dev, &pargs);
ad4e9fec BB	249	period_mag_multi = (u64)pargs.period * haptic->magnitude;
a3b3ca75 JK	250	haptic->pwm_duty = (unsigned int)(period_mag_multi >>
	251	MAX_MAGNITUDE_SHIFT);
	252
	253	schedule_work(&haptic->work);
	254
	255	return 0;
	256	}
	257
	258	static int max77693_haptic_open(struct input_dev *dev)
	259	{
	260	struct max77693_haptic *haptic = input_get_drvdata(dev);
	261	int error;
	262
56bbc99e KK	263	error = max77843_haptic_bias(haptic, true);
	264	if (error)
	265	return error;
	266
a3b3ca75 JK	267	error = regulator_enable(haptic->motor_reg);
	268	if (error) {
	269	dev_err(haptic->dev,
	270	"failed to enable regulator: %d\n", error);
	271	return error;
	272	}
	273
	274	return 0;
	275	}
	276
	277	static void max77693_haptic_close(struct input_dev *dev)
	278	{
	279	struct max77693_haptic *haptic = input_get_drvdata(dev);
	280	int error;
	281
	282	cancel_work_sync(&haptic->work);
	283	max77693_haptic_disable(haptic);
	284
	285	error = regulator_disable(haptic->motor_reg);
	286	if (error)
	287	dev_err(haptic->dev,
	288	"failed to disable regulator: %d\n", error);
56bbc99e KK	289
56bbc99e KK	290	max77843_haptic_bias(haptic, false);
a3b3ca75 JK	291	}
	292
	293	static int max77693_haptic_probe(struct platform_device *pdev)
	294	{
	295	struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
	296	struct max77693_haptic *haptic;
	297	int error;
	298
	299	haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL);
	300	if (!haptic)
	301	return -ENOMEM;
	302
	303	haptic->regmap_pmic = max77693->regmap;
a3b3ca75 JK	304	haptic->dev = &pdev->dev;
	305	haptic->type = MAX77693_HAPTIC_LRA;
	306	haptic->mode = MAX77693_HAPTIC_EXTERNAL_MODE;
a3b3ca75 JK	307	haptic->suspend_state = false;
a3b3ca75 JK	308
6eaa247a KK	309	/* Variant-specific init */
	310	haptic->dev_type = platform_get_device_id(pdev)->driver_data;
	311	switch (haptic->dev_type) {
	312	case TYPE_MAX77693:
	313	haptic->regmap_haptic = max77693->regmap_haptic;
	314	break;
56bbc99e KK	315	case TYPE_MAX77843:
	316	haptic->regmap_haptic = max77693->regmap;
	317	break;
6eaa247a KK	318	default:
	319	dev_err(&pdev->dev, "unsupported device type: %u\n",
	320	haptic->dev_type);
	321	return -EINVAL;
	322	}
	323
a3b3ca75 JK	324	INIT_WORK(&haptic->work, max77693_haptic_play_work);
	325
	326	/* Get pwm and regulatot for haptic device */
	327	haptic->pwm_dev = devm_pwm_get(&pdev->dev, NULL);
	328	if (IS_ERR(haptic->pwm_dev)) {
	329	dev_err(&pdev->dev, "failed to get pwm device\n");
	330	return PTR_ERR(haptic->pwm_dev);
	331	}
	332
ad4e9fec BB	333	/*
	334	* FIXME: pwm_apply_args() should be removed when switching to the
	335	* atomic PWM API.
	336	*/
	337	pwm_apply_args(haptic->pwm_dev);
	338
a3b3ca75 JK	339	haptic->motor_reg = devm_regulator_get(&pdev->dev, "haptic");
	340	if (IS_ERR(haptic->motor_reg)) {
	341	dev_err(&pdev->dev, "failed to get regulator\n");
	342	return PTR_ERR(haptic->motor_reg);
	343	}
	344
	345	/* Initialize input device for haptic device */
	346	haptic->input_dev = devm_input_allocate_device(&pdev->dev);
	347	if (!haptic->input_dev) {
	348	dev_err(&pdev->dev, "failed to allocate input device\n");
	349	return -ENOMEM;
	350	}
	351
	352	haptic->input_dev->name = "max77693-haptic";
	353	haptic->input_dev->id.version = 1;
	354	haptic->input_dev->dev.parent = &pdev->dev;
	355	haptic->input_dev->open = max77693_haptic_open;
	356	haptic->input_dev->close = max77693_haptic_close;
	357	input_set_drvdata(haptic->input_dev, haptic);
	358	input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE);
	359
	360	error = input_ff_create_memless(haptic->input_dev, NULL,
	361	max77693_haptic_play_effect);
	362	if (error) {
	363	dev_err(&pdev->dev, "failed to create force-feedback\n");
	364	return error;
	365	}
	366
	367	error = input_register_device(haptic->input_dev);
	368	if (error) {
	369	dev_err(&pdev->dev, "failed to register input device\n");
	370	return error;
	371	}
	372
	373	platform_set_drvdata(pdev, haptic);
	374
	375	return 0;
	376	}
	377
97a652a8	378	static int __maybe_unused max77693_haptic_suspend(struct device *dev)
a3b3ca75 JK	379	{
	380	struct platform_device *pdev = to_platform_device(dev);
	381	struct max77693_haptic *haptic = platform_get_drvdata(pdev);
	382
	383	if (haptic->enabled) {
	384	max77693_haptic_disable(haptic);
	385	haptic->suspend_state = true;
	386	}
	387
	388	return 0;
	389	}
	390
97a652a8	391	static int __maybe_unused max77693_haptic_resume(struct device *dev)
a3b3ca75 JK	392	{
	393	struct platform_device *pdev = to_platform_device(dev);
	394	struct max77693_haptic *haptic = platform_get_drvdata(pdev);
	395
	396	if (haptic->suspend_state) {
	397	max77693_haptic_enable(haptic);
	398	haptic->suspend_state = false;
	399	}
	400
	401	return 0;
	402	}
a3b3ca75 JK	403
	404	static SIMPLE_DEV_PM_OPS(max77693_haptic_pm_ops,
	405	max77693_haptic_suspend, max77693_haptic_resume);
	406
6eaa247a KK	407	static const struct platform_device_id max77693_haptic_id[] = {
6eaa247a KK	408	{ "max77693-haptic", TYPE_MAX77693 },
56bbc99e	409	{ "max77843-haptic", TYPE_MAX77843 },
6eaa247a KK	410	{},
	411	};
	412	MODULE_DEVICE_TABLE(platform, max77693_haptic_id);
	413
a3b3ca75 JK	414	static struct platform_driver max77693_haptic_driver = {
	415	.driver = {
	416	.name = "max77693-haptic",
a3b3ca75 JK	417	.pm = &max77693_haptic_pm_ops,
	418	},
	419	.probe = max77693_haptic_probe,
6eaa247a	420	.id_table = max77693_haptic_id,
a3b3ca75 JK	421	};
	422	module_platform_driver(max77693_haptic_driver);
	423
	424	MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
3f5c5920	425	MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
56bbc99e	426	MODULE_DESCRIPTION("MAXIM 77693/77843 Haptic driver");
a3b3ca75 JK	427	MODULE_ALIAS("platform:max77693-haptic");
a3b3ca75 JK	428	MODULE_LICENSE("GPL");