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