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// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2007-2010 ST-Ericsson
 * Register access functions for the ABX500 Mixed Signal IC family.
 * Author: Mattias Wallin <mattias.wallin@stericsson.com>
 */

#include <linux/list.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/export.h>
#include <linux/mfd/abx500.h>

static LIST_HEAD(abx500_list);

struct abx500_device_entry {
	struct list_head list;
	struct abx500_ops ops;
	struct device *dev;
};

static void lookup_ops(struct device *dev, struct abx500_ops **ops)
{
	struct abx500_device_entry *dev_entry;

	*ops = NULL;
	list_for_each_entry(dev_entry, &abx500_list, list) {
		if (dev_entry->dev == dev) {
			*ops = &dev_entry->ops;
			return;
		}
	}
}

int abx500_register_ops(struct device *dev, struct abx500_ops *ops)
{
	struct abx500_device_entry *dev_entry;

	dev_entry = devm_kzalloc(dev, sizeof(*dev_entry), GFP_KERNEL);
	if (!dev_entry)
		return -ENOMEM;

	dev_entry->dev = dev;
	memcpy(&dev_entry->ops, ops, sizeof(*ops));

	list_add_tail(&dev_entry->list, &abx500_list);
	return 0;
}
EXPORT_SYMBOL(abx500_register_ops);

void abx500_remove_ops(struct device *dev)
{
	struct abx500_device_entry *dev_entry, *tmp;

	list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list)
		if (dev_entry->dev == dev)
			list_del(&dev_entry->list);
}
EXPORT_SYMBOL(abx500_remove_ops);

int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg,
	u8 value)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);