linux/drivers/mfd/lochnagar-i2c.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Lochnagar I2C bus interface
 *
 * Copyright (c) 2012-2018 Cirrus Logic, Inc. and
 *                         Cirrus Logic International Semiconductor Ltd.
 *
 * Author: Charles Keepax <[email protected]>
 */

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/lockdep.h>
#include <linux/mfd/core.h>
#include <linux/mod_devicetable.h>
#include <linux/mutex.h>
#include <linux/of_platform.h>
#include <linux/regmap.h>

#include <linux/mfd/lochnagar.h>
#include <linux/mfd/lochnagar1_regs.h>
#include <linux/mfd/lochnagar2_regs.h>

#define LOCHNAGAR_BOOT_RETRIES …
#define LOCHNAGAR_BOOT_DELAY_MS …

#define LOCHNAGAR_CONFIG_POLL_US …

static bool lochnagar1_readable_register(struct device *dev, unsigned int reg)
{ … }

static const struct regmap_config lochnagar1_i2c_regmap = …;

static const struct reg_sequence lochnagar1_patch[] = …;

static bool lochnagar2_readable_register(struct device *dev, unsigned int reg)
{ … }

static bool lochnagar2_volatile_register(struct device *dev, unsigned int reg)
{ … }

static const struct regmap_config lochnagar2_i2c_regmap = …;

static const struct reg_sequence lochnagar2_patch[] = …;

struct lochnagar_config { … };

static struct lochnagar_config lochnagar_configs[] = …;

static const struct of_device_id lochnagar_of_match[] = …;

static int lochnagar_wait_for_boot(struct regmap *regmap, unsigned int *id)
{ … }

/**
 * lochnagar_update_config - Synchronise the boards analogue configuration to
 *                           the hardware.
 *
 * @lochnagar: A pointer to the primary core data structure.
 *
 * Return: Zero on success or an appropriate negative error code on failure.
 */
int lochnagar_update_config(struct lochnagar *lochnagar)
{ … }
EXPORT_SYMBOL_GPL(…);

static int lochnagar_i2c_probe(struct i2c_client *i2c)
{ … }

static struct i2c_driver lochnagar_i2c_driver = …;

static int __init lochnagar_i2c_init(void)
{ … }
subsys_initcall(lochnagar_i2c_init);