linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * FPGA Bridge Framework Driver

 *

 *  Copyright (C) 2013-2016 Altera Corporation, All Rights Reserved.

 *  Copyright (C) 2017 Intel Corporation

 */

#include <linux/fpga/fpga-bridge.h>

#include <linux/idr.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

​

static DEFINE_IDA(fpga_bridge_ida);

static struct class *fpga_bridge_class;

​

/* Lock for adding/removing bridges to linked lists*/

static spinlock_t bridge_list_lock;

​

static int fpga_bridge_of_node_match(struct device *dev, const void *data)

{

    return dev->of_node == data;

}

​

/**

 * fpga_bridge_enable - Enable transactions on the bridge

 *

 * @bridge: FPGA bridge

 *

 * Return: 0 for success, error code otherwise.

 */

int fpga_bridge_enable(struct fpga_bridge *bridge)

{

    dev_dbg(&bridge->dev, "enable\n");

​

    if (bridge->br_ops && bridge->br_ops->enable_set)

        return bridge->br_ops->enable_set(bridge, 1);

​

    return 0;

}

EXPORT_SYMBOL_GPL(fpga_bridge_enable);

​

/**

 * fpga_bridge_disable - Disable transactions on the bridge

 *

 * @bridge: FPGA bridge

 *

 * Return: 0 for success, error code otherwise.

 */

int fpga_bridge_disable(struct fpga_bridge *bridge)

{

    dev_dbg(&bridge->dev, "disable\n");

​

    if (bridge->br_ops && bridge->br_ops->enable_set)

        return bridge->br_ops->enable_set(bridge, 0);

​

    return 0;

}

EXPORT_SYMBOL_GPL(fpga_bridge_disable);

​

static struct fpga_bridge *__fpga_bridge_get(struct device *dev,