linux/drivers/input/touchscreen/mms114.c

// SPDX-License-Identifier: GPL-2.0
// Melfas MMS114/MMS136/MMS152 touchscreen device driver
//
// Copyright (c) 2012 Samsung Electronics Co., Ltd.
// Author: Joonyoung Shim <[email protected]>

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/i2c.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/interrupt.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>

/* Write only registers */
#define MMS114_MODE_CONTROL …
#define MMS114_OPERATION_MODE_MASK …
#define MMS114_ACTIVE …

#define MMS114_XY_RESOLUTION_H …
#define MMS114_X_RESOLUTION …
#define MMS114_Y_RESOLUTION …
#define MMS114_CONTACT_THRESHOLD …
#define MMS114_MOVING_THRESHOLD …

/* Read only registers */
#define MMS114_PACKET_SIZE …
#define MMS114_INFORMATION …
#define MMS114_TSP_REV …

#define MMS152_FW_REV …
#define MMS152_COMPAT_GROUP …

/* Minimum delay time is 50us between stop and start signal of i2c */
#define MMS114_I2C_DELAY …

/* 200ms needs after power on */
#define MMS114_POWERON_DELAY …

/* Touchscreen absolute values */
#define MMS114_MAX_AREA …

#define MMS114_MAX_TOUCHKEYS …
#define MMS114_MAX_TOUCH …
#define MMS114_EVENT_SIZE …
#define MMS136_EVENT_SIZE …

/* Touch type */
#define MMS114_TYPE_NONE …
#define MMS114_TYPE_TOUCHSCREEN …
#define MMS114_TYPE_TOUCHKEY …

enum mms_type { … };

struct mms114_data { … };

struct mms114_touch { … } __packed;

static int __mms114_read_reg(struct mms114_data *data, unsigned int reg,
			     unsigned int len, u8 *val)
{ … }

static int mms114_read_reg(struct mms114_data *data, unsigned int reg)
{ … }

static int mms114_write_reg(struct mms114_data *data, unsigned int reg,
			    unsigned int val)
{ … }

static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *touch)
{ … }

static void mms114_process_touchkey(struct mms114_data *data,
				    struct mms114_touch *touch)
{ … }

static irqreturn_t mms114_interrupt(int irq, void *dev_id)
{ … }

static int mms114_set_active(struct mms114_data *data, bool active)
{ … }

static int mms114_get_version(struct mms114_data *data)
{ … }

static int mms114_setup_regs(struct mms114_data *data)
{ … }

static int mms114_start(struct mms114_data *data)
{ … }

static void mms114_stop(struct mms114_data *data)
{ … }

static int mms114_input_open(struct input_dev *dev)
{ … }

static void mms114_input_close(struct input_dev *dev)
{ … }

static int mms114_parse_legacy_bindings(struct mms114_data *data)
{ … }

static int mms114_probe(struct i2c_client *client)
{ … }

static int mms114_suspend(struct device *dev)
{ … }

static int mms114_resume(struct device *dev)
{ … }

static DEFINE_SIMPLE_DEV_PM_OPS(mms114_pm_ops, mms114_suspend, mms114_resume);

static const struct i2c_device_id mms114_id[] = …;
MODULE_DEVICE_TABLE(i2c, mms114_id);

#ifdef CONFIG_OF
static const struct of_device_id mms114_dt_match[] = …;
MODULE_DEVICE_TABLE(of, mms114_dt_match);
#endif

static struct i2c_driver mms114_driver = …;

module_i2c_driver(…) …;

/* Module information */
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;