linux/drivers/media/usb/stk1160/stk1160-i2c.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * STK1160 driver
 *
 * Copyright (C) 2012 Ezequiel Garcia
 * <elezegarcia--a.t--gmail.com>
 *
 * Based on Easycap driver by R.M. Thomas
 *	Copyright (C) 2010 R.M. Thomas
 *	<rmthomas--a.t--sciolus.org>
 */

#include <linux/module.h>
#include <linux/usb.h>
#include <linux/i2c.h>

#include "stk1160.h"
#include "stk1160-reg.h"

static unsigned int i2c_debug;
module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(…) …;

#define dprintk_i2c(fmt, args...) …

static int stk1160_i2c_busy_wait(struct stk1160 *dev, u8 wait_bit_mask)
{ … }

static int stk1160_i2c_write_reg(struct stk1160 *dev, u8 addr,
		u8 reg, u8 value)
{ … }

static int stk1160_i2c_read_reg(struct stk1160 *dev, u8 addr,
		u8 reg, u8 *value)
{ … }

/*
 * stk1160_i2c_check_for_device()
 * check if there is a i2c_device at the supplied address
 */
static int stk1160_i2c_check_for_device(struct stk1160 *dev,
		unsigned char addr)
{ … }

/*
 * stk1160_i2c_xfer()
 * the main i2c transfer function
 */
static int stk1160_i2c_xfer(struct i2c_adapter *i2c_adap,
			   struct i2c_msg msgs[], int num)
{ … }

/*
 * functionality(), what da heck is this?
 */
static u32 functionality(struct i2c_adapter *adap)
{ … }

static const struct i2c_algorithm algo = …;

static const struct i2c_adapter adap_template = …;

static const struct i2c_client client_template = …;

/*
 * stk1160_i2c_register()
 * register i2c bus
 */
int stk1160_i2c_register(struct stk1160 *dev)
{ … }

/*
 * stk1160_i2c_unregister()
 * unregister i2c_bus
 */
int stk1160_i2c_unregister(struct stk1160 *dev)
{ … }