1/*
 2 * arch/arm/plat-iop/gpio.c
 3 * GPIO handling for Intel IOP3xx processors.
 4 *
 5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 6 *
 7 * This program is free software; you can redistribute it and/or modify
 8 * it under the terms of the GNU General Public License as published by
 9 * the Free Software Foundation; either version 2 of the License, or (at
10 * your option) any later version.
11 */
12
13#include <linux/err.h>
14#include <linux/module.h>
15#include <linux/gpio/driver.h>
16#include <linux/platform_device.h>
17
18#define IOP3XX_GPOE	0x0000
19#define IOP3XX_GPID	0x0004
20#define IOP3XX_GPOD	0x0008
21
22static int iop3xx_gpio_probe(struct platform_device *pdev)
23{
24	struct resource *res;
25	struct gpio_chip *gc;
26	void __iomem *base;
27	int err;
28
29	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
30	if (!gc)
31		return -ENOMEM;
32
33	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
34	base = devm_ioremap_resource(&pdev->dev, res);
35	if (IS_ERR(base))
36		return PTR_ERR(base);
37
38	err = bgpio_init(gc, &pdev->dev, 1, base + IOP3XX_GPID,
39			 base + IOP3XX_GPOD, NULL, NULL, base + IOP3XX_GPOE, 0);
40	if (err)
41		return err;
42
43	gc->base = 0;
44	gc->owner = THIS_MODULE;
45
46	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
47}
48
49static struct platform_driver iop3xx_gpio_driver = {
50	.driver = {
51		.name = "gpio-iop",
52	},
53	.probe = iop3xx_gpio_probe,
54};
55
56static int __init iop3xx_gpio_init(void)
57{
58	return platform_driver_register(&iop3xx_gpio_driver);
59}
60arch_initcall(iop3xx_gpio_init);
61
62MODULE_DESCRIPTION("GPIO handling for Intel IOP3xx processors");
63MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
64MODULE_LICENSE("GPL");