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
|
/*
* Copyright (C) 2015
* Bhuvanchandra DV, Toradex, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <asm/gpio.h>
#include <asm/imx-common/iomux-v3.h>
#include <asm/io.h>
#include <malloc.h>
DECLARE_GLOBAL_DATA_PTR;
struct vybrid_gpios {
unsigned int chip;
struct vybrid_gpio_regs *reg;
};
static int vybrid_gpio_direction_input(struct udevice *dev, unsigned gpio)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_IN);
return 0;
}
static int vybrid_gpio_direction_output(struct udevice *dev, unsigned gpio,
int value)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
gpio_set_value(gpio, value);
imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_OUT);
return 0;
}
static int vybrid_gpio_get_value(struct udevice *dev, unsigned gpio)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
return ((readl(&gpios->reg->gpio_pdir) & (1 << gpio))) ? 1 : 0;
}
static int vybrid_gpio_set_value(struct udevice *dev, unsigned gpio,
int value)
{
const struct vybrid_gpios *gpios = dev_get_priv(dev);
if (value)
writel((1 << gpio), &gpios->reg->gpio_psor);
else
writel((1 << gpio), &gpios->reg->gpio_pcor);
return 0;
}
static const struct dm_gpio_ops gpio_vybrid_ops = {
.direction_input = vybrid_gpio_direction_input,
.direction_output = vybrid_gpio_direction_output,
.get_value = vybrid_gpio_get_value,
.set_value = vybrid_gpio_set_value,
};
static int vybrid_gpio_probe(struct udevice *dev)
{
struct vybrid_gpios *gpios = dev_get_priv(dev);
struct vybrid_gpio_platdata *plat = dev_get_platdata(dev);
struct gpio_dev_priv *uc_priv = dev->uclass_priv;
uc_priv->bank_name = "GPIO";
uc_priv->gpio_count = VYBRID_GPIO_COUNT;
gpios->reg = (struct vybrid_gpio_regs *)plat->base;
gpios->chip = plat->chip;
return 0;
}
static int vybrid_gpio_bind(struct udevice *dev)
{
struct vybrid_gpio_platdata *plat = dev->platdata;
fdt_addr_t base_addr;
if (plat)
return 0;
base_addr = dev_get_addr(dev);
if (base_addr == FDT_ADDR_T_NONE)
return -ENODEV;
plat = calloc(1, sizeof(*plat));
if (!plat)
return -ENOMEM;
plat->base = base_addr;
plat->chip = dev->req_seq;
dev->platdata = plat;
return 0;
}
static const struct udevice_id vybrid_gpio_ids[] = {
{ .compatible = "fsl,vf610-gpio" },
{ }
};
U_BOOT_DRIVER(gpio_vybrid) = {
.name = "gpio_vybrid",
.id = UCLASS_GPIO,
.ops = &gpio_vybrid_ops,
.probe = vybrid_gpio_probe,
.priv_auto_alloc_size = sizeof(struct vybrid_gpios),
.of_match = vybrid_gpio_ids,
.bind = vybrid_gpio_bind,
};
|
