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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Copyright (C) 2014-2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <vsprintf.h>
#include <dm/lists.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
#include <power/pmic.h>
#include <linux/ctype.h>
DECLARE_GLOBAL_DATA_PTR;
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
int pmic_bind_children(struct udevice *pmic, ofnode parent,
const struct pmic_child_info *child_info)
{
const struct pmic_child_info *info;
struct driver *drv;
struct udevice *child;
const char *node_name;
int bind_count = 0;
ofnode node;
int prefix_len;
int ret;
debug("%s for '%s' at node offset: %d\n", __func__, pmic->name,
dev_of_offset(pmic));
ofnode_for_each_subnode(node, parent) {
node_name = ofnode_get_name(node);
debug("* Found child node: '%s'\n", node_name);
child = NULL;
for (info = child_info; info->prefix && info->driver; info++) {
debug(" - compatible prefix: '%s'\n", info->prefix);
prefix_len = strlen(info->prefix);
if (strncmp(info->prefix, node_name, prefix_len))
continue;
drv = lists_driver_lookup_name(info->driver);
if (!drv) {
debug(" - driver: '%s' not found!\n",
info->driver);
continue;
}
debug(" - found child driver: '%s'\n", drv->name);
ret = device_bind_with_driver_data(pmic, drv, node_name,
0, node, &child);
if (ret) {
debug(" - child binding error: %d\n", ret);
continue;
}
debug(" - bound child device: '%s'\n", child->name);
child->driver_data = trailing_strtol(node_name);
debug(" - set 'child->driver_data': %lu\n",
child->driver_data);
break;
}
if (child)
bind_count++;
else
debug(" - compatible prefix not found\n");
}
debug("Bound: %d children for PMIC: '%s'\n", bind_count, pmic->name);
return bind_count;
}
#endif
int pmic_get(const char *name, struct udevice **devp)
{
return uclass_get_device_by_name(UCLASS_PMIC, name, devp);
}
int pmic_reg_count(struct udevice *dev)
{
const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->reg_count)
return -ENOSYS;
return ops->reg_count(dev);
}
int pmic_read(struct udevice *dev, uint reg, uint8_t *buffer, int len)
{
const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
if (!buffer)
return -EFAULT;
if (!ops || !ops->read)
return -ENOSYS;
return ops->read(dev, reg, buffer, len);
}
int pmic_write(struct udevice *dev, uint reg, const uint8_t *buffer, int len)
{
const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
if (!buffer)
return -EFAULT;
if (!ops || !ops->write)
return -ENOSYS;
return ops->write(dev, reg, buffer, len);
}
int pmic_reg_read(struct udevice *dev, uint reg)
{
u8 byte;
int ret;
debug("%s: reg=%x", __func__, reg);
ret = pmic_read(dev, reg, &byte, 1);
debug(", value=%x, ret=%d\n", byte, ret);
return ret ? ret : byte;
}
int pmic_reg_write(struct udevice *dev, uint reg, uint value)
{
u8 byte = value;
int ret;
debug("%s: reg=%x, value=%x", __func__, reg, value);
ret = pmic_write(dev, reg, &byte, 1);
debug(", ret=%d\n", ret);
return ret;
}
int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)
{
u8 byte;
int ret;
ret = pmic_reg_read(dev, reg);
if (ret < 0)
return ret;
byte = (ret & ~clr) | set;
return pmic_reg_write(dev, reg, byte);
}
UCLASS_DRIVER(pmic) = {
.id = UCLASS_PMIC,
.name = "pmic",
};
|
