1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/arm/plat-iop/gpio.c
4*4882a593Smuzhiyun * GPIO handling for Intel IOP3xx processors.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/err.h>
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/gpio/driver.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #define IOP3XX_GPOE 0x0000
15*4882a593Smuzhiyun #define IOP3XX_GPID 0x0004
16*4882a593Smuzhiyun #define IOP3XX_GPOD 0x0008
17*4882a593Smuzhiyun
iop3xx_gpio_probe(struct platform_device * pdev)18*4882a593Smuzhiyun static int iop3xx_gpio_probe(struct platform_device *pdev)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun struct gpio_chip *gc;
21*4882a593Smuzhiyun void __iomem *base;
22*4882a593Smuzhiyun int err;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
25*4882a593Smuzhiyun if (!gc)
26*4882a593Smuzhiyun return -ENOMEM;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun base = devm_platform_ioremap_resource(pdev, 0);
29*4882a593Smuzhiyun if (IS_ERR(base))
30*4882a593Smuzhiyun return PTR_ERR(base);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun err = bgpio_init(gc, &pdev->dev, 1, base + IOP3XX_GPID,
33*4882a593Smuzhiyun base + IOP3XX_GPOD, NULL, NULL, base + IOP3XX_GPOE, 0);
34*4882a593Smuzhiyun if (err)
35*4882a593Smuzhiyun return err;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun gc->base = 0;
38*4882a593Smuzhiyun gc->owner = THIS_MODULE;
39*4882a593Smuzhiyun gc->label = "gpio-iop";
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun static struct platform_driver iop3xx_gpio_driver = {
45*4882a593Smuzhiyun .driver = {
46*4882a593Smuzhiyun .name = "gpio-iop",
47*4882a593Smuzhiyun },
48*4882a593Smuzhiyun .probe = iop3xx_gpio_probe,
49*4882a593Smuzhiyun };
50*4882a593Smuzhiyun
iop3xx_gpio_init(void)51*4882a593Smuzhiyun static int __init iop3xx_gpio_init(void)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun return platform_driver_register(&iop3xx_gpio_driver);
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun arch_initcall(iop3xx_gpio_init);
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun MODULE_DESCRIPTION("GPIO handling for Intel IOP3xx processors");
58*4882a593Smuzhiyun MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
59*4882a593Smuzhiyun MODULE_LICENSE("GPL");
60