linux/drivers/input/misc/pm8xxx-vibrator.c

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
 */

#include <linux/errno.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#define VIB_MAX_LEVEL_mV(vib) …
#define VIB_MIN_LEVEL_mV(vib) …
#define VIB_PER_STEP_mV(vib) …
#define VIB_MAX_LEVELS(vib) …

#define MAX_FF_SPEED …

struct pm8xxx_regs { … };

static const struct pm8xxx_regs pm8058_regs = …;

static struct pm8xxx_regs pm8916_regs = …;

static struct pm8xxx_regs pmi632_regs = …;

/**
 * struct pm8xxx_vib - structure to hold vibrator data
 * @vib_input_dev: input device supporting force feedback
 * @work: work structure to set the vibration parameters
 * @regmap: regmap for register read/write
 * @regs: registers' info
 * @enable_addr: vibrator enable register
 * @drv_addr: vibrator drive strength register
 * @drv2_addr: vibrator drive strength upper byte register
 * @speed: speed of vibration set from userland
 * @active: state of vibrator
 * @level: level of vibration to set in the chip
 * @reg_vib_drv: regs->drv_addr register value
 */
struct pm8xxx_vib { … };

/**
 * pm8xxx_vib_set - handler to start/stop vibration
 * @vib: pointer to vibrator structure
 * @on: state to set
 */
static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
{ … }

/**
 * pm8xxx_work_handler - worker to set vibration level
 * @work: pointer to work_struct
 */
static void pm8xxx_work_handler(struct work_struct *work)
{ … }

/**
 * pm8xxx_vib_close - callback of input close callback
 * @dev: input device pointer
 *
 * Turns off the vibrator.
 */
static void pm8xxx_vib_close(struct input_dev *dev)
{ … }

/**
 * pm8xxx_vib_play_effect - function to handle vib effects.
 * @dev: input device pointer
 * @data: data of effect
 * @effect: effect to play
 *
 * Currently this driver supports only rumble effects.
 */
static int pm8xxx_vib_play_effect(struct input_dev *dev, void *data,
				  struct ff_effect *effect)
{ … }

static int pm8xxx_vib_probe(struct platform_device *pdev)
{ … }

static int pm8xxx_vib_suspend(struct device *dev)
{ … }

static DEFINE_SIMPLE_DEV_PM_OPS(pm8xxx_vib_pm_ops, pm8xxx_vib_suspend, NULL);

static const struct of_device_id pm8xxx_vib_id_table[] = …;
MODULE_DEVICE_TABLE(of, pm8xxx_vib_id_table);

static struct platform_driver pm8xxx_vib_driver = …;
module_platform_driver(…) …;

MODULE_ALIAS(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;