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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* CLPS711X GPIO driver
*
* Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/generic.h>
#include <linux/platform_device.h>
static int clps711x_gpio_probe(struct platform_device *pdev)
{
struct gpio_generic_chip_config config = { };
struct device_node *np = pdev->dev.of_node;
struct gpio_generic_chip *gen_gc;
void __iomem *dat, *dir;
int err, id;
if (!np)
return -ENODEV;
id = of_alias_get_id(np, "gpio");
if ((id < 0) || (id > 4))
return -ENODEV;
gen_gc = devm_kzalloc(&pdev->dev, sizeof(*gen_gc), GFP_KERNEL);
if (!gen_gc)
return -ENOMEM;
dat = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(dat))
return PTR_ERR(dat);
dir = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(dir))
return PTR_ERR(dir);
config.dev = &pdev->dev;
config.sz = 1;
config.dat = dat;
switch (id) {
case 3:
/* PORTD is inverted logic for direction register */
config.dirin = dir;
break;
default:
config.dirout = dir;
break;
}
err = gpio_generic_chip_init(gen_gc, &config);
if (err)
return err;
switch (id) {
case 4:
/* PORTE is 3 lines only */
gen_gc->gc.ngpio = 3;
break;
default:
break;
}
gen_gc->gc.base = -1;
gen_gc->gc.owner = THIS_MODULE;
return devm_gpiochip_add_data(&pdev->dev, &gen_gc->gc, NULL);
}
static const struct of_device_id clps711x_gpio_ids[] = {
{ .compatible = "cirrus,ep7209-gpio" },
{ }
};
MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
static struct platform_driver clps711x_gpio_driver = {
.driver = {
.name = "clps711x-gpio",
.of_match_table = clps711x_gpio_ids,
},
.probe = clps711x_gpio_probe,
};
module_platform_driver(clps711x_gpio_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
MODULE_DESCRIPTION("CLPS711X GPIO driver");
MODULE_ALIAS("platform:clps711x-gpio");
|
