path: root/drivers/irqchip/irq-mbigen.c

/*
 * Copyright (C) 2015 Hisilicon Limited, All Rights Reserved.
 * Author: Jun Ma <majun258@huawei.com>
 * Author: Yun Wu <wuyun.wu@huawei.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

/**
 * struct mbigen_device - holds the information of mbigen device.
 *
 * @pdev:		pointer to the platform device structure of mbigen chip.
 * @base:		mapped address of this mbigen chip.
 */
struct mbigen_device {
	struct platform_device	*pdev;
	void __iomem		*base;
};

static int mbigen_device_probe(struct platform_device *pdev)
{
	struct mbigen_device *mgn_chip;
	struct resource *res;

	mgn_chip = devm_kzalloc(&pdev->dev, sizeof(*mgn_chip), GFP_KERNEL);
	if (!mgn_chip)
		return -ENOMEM;

	mgn_chip->pdev = pdev;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	mgn_chip->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(mgn_chip->base))
		return PTR_ERR(mgn_chip->base);

	platform_set_drvdata(pdev, mgn_chip);

	return 0;
}

static const struct of_device_id mbigen_of_match[] = {
	{ .compatible = "hisilicon,mbigen-v2" },
	{ /* END */ }
};
MODULE_DEVICE_TABLE(of, mbigen_of_match);

static struct platform_driver mbigen_platform_driver = {
	.driver = {
		.name		= "Hisilicon MBIGEN-V2",
		.owner		= THIS_MODULE,
		.of_match_table	= mbigen_of_match,
	},
	.probe			= mbigen_device_probe,
};

module_platform_driver(mbigen_platform_driver);

MODULE_AUTHOR("Jun Ma <majun258@huawei.com>");
MODULE_AUTHOR("Yun Wu <wuyun.wu@huawei.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Hisilicon MBI Generator driver");