1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * arch/arm/plat-iop/gpio.c
 4 * GPIO handling for Intel IOP3xx processors.
 5 *
 6 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 7 */
 8
 9#include <linux/err.h>
10#include <linux/module.h>
11#include <linux/gpio/driver.h>
12#include <linux/platform_device.h>
13
14#define IOP3XX_GPOE	0x0000
15#define IOP3XX_GPID	0x0004
16#define IOP3XX_GPOD	0x0008
17
18static int iop3xx_gpio_probe(struct platform_device *pdev)
19{
20	struct gpio_chip *gc;
21	void __iomem *base;
22	int err;
23
24	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
25	if (!gc)
26		return -ENOMEM;
27
28	base = devm_platform_ioremap_resource(pdev, 0);
29	if (IS_ERR(base))
30		return PTR_ERR(base);
31
32	err = bgpio_init(gc, &pdev->dev, 1, base + IOP3XX_GPID,
33			 base + IOP3XX_GPOD, NULL, NULL, base + IOP3XX_GPOE, 0);
34	if (err)
35		return err;
36
37	gc->base = 0;
38	gc->owner = THIS_MODULE;
39	gc->label = "gpio-iop";
40
41	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
42}
43
44static struct platform_driver iop3xx_gpio_driver = {
45	.driver = {
46		.name = "gpio-iop",
47	},
48	.probe = iop3xx_gpio_probe,
49};
50
51static int __init iop3xx_gpio_init(void)
52{
53	return platform_driver_register(&iop3xx_gpio_driver);
54}
55arch_initcall(iop3xx_gpio_init);
56
57MODULE_DESCRIPTION("GPIO handling for Intel IOP3xx processors");
58MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
59MODULE_LICENSE("GPL");