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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2014 Toradex AG (Stefan Agner <stefan@agner.ch>)
/*
* vf610 GPIO support through PORT and GPIO module
*/
#include <common.h>
#include <errno.h>
#include <io.h>
#include <of.h>
#include <gpio.h>
#include <init.h>
#include <pinctrl.h>
#define VF610_GPIO_PER_PORT 32
#define PINCTRL_BASE 2
#define COUNT 3
struct vf610_gpio_port {
struct gpio_chip chip;
void __iomem *gpio_base;
unsigned int pinctrl_base;
};
#define GPIO_PDOR 0x00
#define GPIO_PSOR 0x04
#define GPIO_PCOR 0x08
#define GPIO_PTOR 0x0c
#define GPIO_PDIR 0x10
static const struct of_device_id vf610_gpio_dt_ids[] = {
{ .compatible = "fsl,vf610-gpio" },
{ /* sentinel */ }
};
static int vf610_gpio_get_value(struct gpio_chip *chip, unsigned int gpio)
{
struct vf610_gpio_port *port =
container_of(chip, struct vf610_gpio_port, chip);
return !!(readl(port->gpio_base + GPIO_PDIR) & BIT(gpio));
}
static void vf610_gpio_set_value(struct gpio_chip *chip,
unsigned int gpio, int val)
{
struct vf610_gpio_port *port =
container_of(chip, struct vf610_gpio_port, chip);
unsigned long mask = BIT(gpio);
writel(mask, port->gpio_base + ((val) ? GPIO_PSOR : GPIO_PCOR));
}
static int vf610_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
struct vf610_gpio_port *port =
container_of(chip, struct vf610_gpio_port, chip);
return pinctrl_gpio_direction_input(port->pinctrl_base + gpio);
}
static int vf610_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
int value)
{
struct vf610_gpio_port *port =
container_of(chip, struct vf610_gpio_port, chip);
vf610_gpio_set_value(chip, gpio, value);
return pinctrl_gpio_direction_output(port->pinctrl_base + gpio);
}
static int vf610_gpio_get_direction(struct gpio_chip *chip, unsigned gpio)
{
struct vf610_gpio_port *port =
container_of(chip, struct vf610_gpio_port, chip);
return pinctrl_gpio_get_direction(port->pinctrl_base + gpio);
}
static struct gpio_ops vf610_gpio_ops = {
.direction_input = vf610_gpio_direction_input,
.direction_output = vf610_gpio_direction_output,
.get = vf610_gpio_get_value,
.set = vf610_gpio_set_value,
.get_direction = vf610_gpio_get_direction,
};
static int vf610_gpio_probe(struct device_d *dev)
{
int ret, size;
struct resource *iores;
struct vf610_gpio_port *port;
const __be32 *gpio_ranges;
port = xzalloc(sizeof(*port));
gpio_ranges = of_get_property(dev->device_node, "gpio-ranges", &size);
if (!gpio_ranges) {
dev_err(dev, "Couldn't read 'gpio-ranges' propery of %s\n",
dev->device_node->full_name);
ret = -EINVAL;
goto free_port;
}
port->pinctrl_base = be32_to_cpu(gpio_ranges[PINCTRL_BASE]);
port->chip.ngpio = be32_to_cpu(gpio_ranges[COUNT]);
iores = dev_request_mem_resource(dev, 1);
if (IS_ERR(iores)) {
ret = PTR_ERR(iores);
dev_dbg(dev, "Failed to request memory resource\n");
goto free_port;
}
port->gpio_base = IOMEM(iores->start);
port->chip.ops = &vf610_gpio_ops;
if (dev->id < 0) {
port->chip.base = of_alias_get_id(dev->device_node, "gpio");
if (port->chip.base < 0) {
ret = port->chip.base;
dev_dbg(dev, "Failed to get GPIO alias\n");
goto free_port;
}
} else {
port->chip.base = dev->id;
}
port->chip.base *= VF610_GPIO_PER_PORT;
port->chip.dev = dev;
return gpiochip_add(&port->chip);
free_port:
free(port);
return ret;
}
static struct driver_d vf610_gpio_driver = {
.name = "gpio-vf610",
.probe = vf610_gpio_probe,
.of_compatible = DRV_OF_COMPAT(vf610_gpio_dt_ids),
};
postcore_platform_driver(vf610_gpio_driver);
|
