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
iop3xx_gpio_probe(struct platform_device * pdev)22 static 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
49 static struct platform_driver iop3xx_gpio_driver = {
50 .driver = {
51 .name = "gpio-iop",
52 },
53 .probe = iop3xx_gpio_probe,
54 };
55
iop3xx_gpio_init(void)56 static int __init iop3xx_gpio_init(void)
57 {
58 return platform_driver_register(&iop3xx_gpio_driver);
59 }
60 arch_initcall(iop3xx_gpio_init);
61
62 MODULE_DESCRIPTION("GPIO handling for Intel IOP3xx processors");
63 MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
64 MODULE_LICENSE("GPL");
65
