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Commit 38a986c0 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Mark Brown
Browse files

Input: Remove the max77843 haptic driver 



The max77693 haptic driver supports Maxim 77843 device so remove the
max77843 driver.

Signed-off-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 56bbc99e

drivers/input/misc/Kconfig

+0 −12
Original line number Diff line number Diff line
@@ -177,18 +177,6 @@ config INPUT_MAX77693_HAPTIC 
	  To compile this driver as module, choose M here: the

	  module will be called max77693-haptic.



config INPUT_MAX77843_HAPTIC

    tristate "MAXIM MAX77843 haptic controller support"

    depends on MFD_MAX77843 && REGULATOR

    select INPUT_FF_MEMLESS

    help

      This option enables support for the haptic controller on

      MAXIM MAX77843 chip. The driver supports ff-memless interface

      from input framework.



      To compile this driver as module, choose M here: the

      module will be called max77843-haptic.



config INPUT_MAX8925_ONKEY

	tristate "MAX8925 ONKEY support"

	depends on MFD_MAX8925

drivers/input/misc/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -41,7 +41,6 @@ obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o 
obj-$(CONFIG_INPUT_KXTJ9)		+= kxtj9.o

obj-$(CONFIG_INPUT_M68K_BEEP)		+= m68kspkr.o

obj-$(CONFIG_INPUT_MAX77693_HAPTIC)	+= max77693-haptic.o

obj-$(CONFIG_INPUT_MAX77843_HAPTIC)	+= max77843-haptic.o

obj-$(CONFIG_INPUT_MAX8925_ONKEY)	+= max8925_onkey.o

obj-$(CONFIG_INPUT_MAX8997_HAPTIC)	+= max8997_haptic.o

obj-$(CONFIG_INPUT_MC13783_PWRBUTTON)	+= mc13783-pwrbutton.o

drivers/input/misc/max77843-haptic.c

deleted100644 → 0
+0 −359
Original line number Diff line number Diff line 
/*

 * MAXIM MAX77693 Haptic device driver

 *

 * Copyright (C) 2015 Samsung Electronics

 * Author: Jaewon Kim <jaewon02.kim@samsung.com>

 *

 * 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/i2c.h>

#include <linux/init.h>

#include <linux/input.h>

#include <linux/mfd/max77693-common.h>

#include <linux/mfd/max77843-private.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pwm.h>

#include <linux/regmap.h>

#include <linux/regulator/consumer.h>

#include <linux/slab.h>

#include <linux/workqueue.h>



#define MAX_MAGNITUDE_SHIFT        16



enum max77843_haptic_motor_type {

	MAX77843_HAPTIC_ERM = 0,

	MAX77843_HAPTIC_LRA,

};



enum max77843_haptic_pwm_divisor {

	MAX77843_HAPTIC_PWM_DIVISOR_32 = 0,

	MAX77843_HAPTIC_PWM_DIVISOR_64,

	MAX77843_HAPTIC_PWM_DIVISOR_128,

	MAX77843_HAPTIC_PWM_DIVISOR_256,

};



struct max77843_haptic {

	struct regmap *regmap_haptic;

	struct device *dev;

	struct input_dev *input_dev;

	struct pwm_device *pwm_dev;

	struct regulator *motor_reg;

	struct work_struct work;

	struct mutex mutex;



	unsigned int magnitude;

	unsigned int pwm_duty;



	bool active;

	bool suspended;



	enum max77843_haptic_motor_type type;

	enum max77843_haptic_pwm_divisor pwm_divisor;

};



static int max77843_haptic_set_duty_cycle(struct max77843_haptic *haptic)

{

	int delta = (haptic->pwm_dev->period + haptic->pwm_duty) / 2;

	int error;



	error = pwm_config(haptic->pwm_dev, delta, haptic->pwm_dev->period);

	if (error) {

		dev_err(haptic->dev, "failed to configure pwm: %d\n", error);

		return error;

	}



	return 0;

}



static int max77843_haptic_bias(struct max77843_haptic *haptic, bool on)

{

	int error;



	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 max77843_haptic_config(struct max77843_haptic *haptic, bool enable)

{

	unsigned int value;

	int error;



	value = (haptic->type << MCONFIG_MODE_SHIFT) |

		(enable << MCONFIG_MEN_SHIFT) |

		(haptic->pwm_divisor << MCONFIG_PDIV_SHIFT);



	error = regmap_write(haptic->regmap_haptic,

			     MAX77843_HAP_REG_MCONFIG, value);

	if (error) {

		dev_err(haptic->dev,

			"failed to update haptic config: %d\n", error);

		return error;

	}



	return 0;

}



static int max77843_haptic_enable(struct max77843_haptic *haptic)

{

	int error;



	if (haptic->active)

		return 0;



	error = pwm_enable(haptic->pwm_dev);

	if (error) {

		dev_err(haptic->dev,

			"failed to enable pwm device: %d\n", error);

		return error;

	}



	error = max77843_haptic_config(haptic, true);

	if (error)

		goto err_config;



	haptic->active = true;



	return 0;



err_config:

	pwm_disable(haptic->pwm_dev);



	return error;

}



static int max77843_haptic_disable(struct max77843_haptic *haptic)

{

	int error;



	if (!haptic->active)

		return 0;



	error = max77843_haptic_config(haptic, false);

	if (error)

		return error;



	pwm_disable(haptic->pwm_dev);



	haptic->active = false;



	return 0;

}



static void max77843_haptic_play_work(struct work_struct *work)

{

	struct max77843_haptic *haptic =

			container_of(work, struct max77843_haptic, work);

	int error;



	mutex_lock(&haptic->mutex);



	if (haptic->suspended)

		goto out_unlock;



	if (haptic->magnitude) {

		error = max77843_haptic_set_duty_cycle(haptic);

		if (error) {

			dev_err(haptic->dev,

				"failed to set duty cycle: %d\n", error);

			goto out_unlock;

		}



		error = max77843_haptic_enable(haptic);

		if (error)

			dev_err(haptic->dev,

				"cannot enable haptic: %d\n", error);

	} else {

		error = max77843_haptic_disable(haptic);

		if (error)

			dev_err(haptic->dev,

				"cannot disable haptic: %d\n", error);

	}



out_unlock:

	mutex_unlock(&haptic->mutex);

}



static int max77843_haptic_play_effect(struct input_dev *dev, void *data,

		struct ff_effect *effect)

{

	struct max77843_haptic *haptic = input_get_drvdata(dev);

	u64 period_mag_multi;



	haptic->magnitude = effect->u.rumble.strong_magnitude;

	if (!haptic->magnitude)

		haptic->magnitude = effect->u.rumble.weak_magnitude;



	period_mag_multi = (u64)haptic->pwm_dev->period * haptic->magnitude;

	haptic->pwm_duty = (unsigned int)(period_mag_multi >>

						MAX_MAGNITUDE_SHIFT);



	schedule_work(&haptic->work);



	return 0;

}



static int max77843_haptic_open(struct input_dev *dev)

{

	struct max77843_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 max77843_haptic_close(struct input_dev *dev)

{

	struct max77843_haptic *haptic = input_get_drvdata(dev);

	int error;



	cancel_work_sync(&haptic->work);

	max77843_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 max77843_haptic_probe(struct platform_device *pdev)

{

	struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);

	struct max77843_haptic *haptic;

	int error;



	haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL);

	if (!haptic)

		return -ENOMEM;



	haptic->regmap_haptic = max77843->regmap;

	haptic->dev = &pdev->dev;

	haptic->type = MAX77843_HAPTIC_LRA;

	haptic->pwm_divisor = MAX77843_HAPTIC_PWM_DIVISOR_128;



	INIT_WORK(&haptic->work, max77843_haptic_play_work);

	mutex_init(&haptic->mutex);



	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);

	}



	haptic->motor_reg = devm_regulator_get_exclusive(&pdev->dev, "haptic");

	if (IS_ERR(haptic->motor_reg)) {

		dev_err(&pdev->dev, "failed to get regulator\n");

		return PTR_ERR(haptic->motor_reg);

	}



	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 = "max77843-haptic";

	haptic->input_dev->id.version = 1;

	haptic->input_dev->dev.parent = &pdev->dev;

	haptic->input_dev->open = max77843_haptic_open;

	haptic->input_dev->close = max77843_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,

			max77843_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 max77843_haptic_suspend(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct max77843_haptic *haptic = platform_get_drvdata(pdev);

	int error;



	error = mutex_lock_interruptible(&haptic->mutex);

	if (error)

		return error;



	max77843_haptic_disable(haptic);



	haptic->suspended = true;



	mutex_unlock(&haptic->mutex);



	return 0;

}



static int __maybe_unused max77843_haptic_resume(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct max77843_haptic *haptic = platform_get_drvdata(pdev);

	unsigned int magnitude;



	mutex_lock(&haptic->mutex);



	haptic->suspended = false;



	magnitude = ACCESS_ONCE(haptic->magnitude);

	if (magnitude)

		max77843_haptic_enable(haptic);



	mutex_unlock(&haptic->mutex);



	return 0;

}



static SIMPLE_DEV_PM_OPS(max77843_haptic_pm_ops,

		max77843_haptic_suspend, max77843_haptic_resume);



static struct platform_driver max77843_haptic_driver = {

	.driver		= {

		.name	= "max77843-haptic",

		.pm	= &max77843_haptic_pm_ops,

	},

	.probe		= max77843_haptic_probe,

};

module_platform_driver(max77843_haptic_driver);



MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");

MODULE_DESCRIPTION("MAXIM MAX77843 Haptic driver");

MODULE_LICENSE("GPL");