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
iop3xx_gpio_probe(struct platform_device * pdev)18 static 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
44 static struct platform_driver iop3xx_gpio_driver = {
45 .driver = {
46 .name = "gpio-iop",
47 },
48 .probe = iop3xx_gpio_probe,
49 };
50
iop3xx_gpio_init(void)51 static int __init iop3xx_gpio_init(void)
52 {
53 return platform_driver_register(&iop3xx_gpio_driver);
54 }
55 arch_initcall(iop3xx_gpio_init);
56
57 MODULE_DESCRIPTION("GPIO handling for Intel IOP3xx processors");
58 MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
59 MODULE_LICENSE("GPL");
60