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
168
169
170
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016, NVIDIA CORPORATION.
*/
#define LOG_CATEGORY UCLASS_POWER_DOMAIN
#include <common.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <power-domain.h>
#include <power-domain-uclass.h>
#include <dm/device-internal.h>
static inline struct power_domain_ops *power_domain_dev_ops(struct udevice *dev)
{
return (struct power_domain_ops *)dev->driver->ops;
}
static int power_domain_of_xlate_default(struct power_domain *power_domain,
struct ofnode_phandle_args *args)
{
debug("%s(power_domain=%p)\n", __func__, power_domain);
if (args->args_count != 1) {
debug("Invalid args_count: %d\n", args->args_count);
return -EINVAL;
}
power_domain->id = args->args[0];
return 0;
}
int power_domain_get_by_index(struct udevice *dev,
struct power_domain *power_domain, int index)
{
struct ofnode_phandle_args args;
int ret;
struct udevice *dev_power_domain;
struct power_domain_ops *ops;
debug("%s(dev=%p, power_domain=%p)\n", __func__, dev, power_domain);
ret = dev_read_phandle_with_args(dev, "power-domains",
"#power-domain-cells", 0, index,
&args);
if (ret) {
debug("%s: dev_read_phandle_with_args failed: %d\n",
__func__, ret);
return ret;
}
ret = uclass_get_device_by_ofnode(UCLASS_POWER_DOMAIN, args.node,
&dev_power_domain);
if (ret) {
debug("%s: uclass_get_device_by_ofnode failed: %d\n",
__func__, ret);
return ret;
}
ops = power_domain_dev_ops(dev_power_domain);
power_domain->dev = dev_power_domain;
if (ops->of_xlate)
ret = ops->of_xlate(power_domain, &args);
else
ret = power_domain_of_xlate_default(power_domain, &args);
if (ret) {
debug("of_xlate() failed: %d\n", ret);
return ret;
}
ret = ops->request(power_domain);
if (ret) {
debug("ops->request() failed: %d\n", ret);
return ret;
}
return 0;
}
int power_domain_get(struct udevice *dev, struct power_domain *power_domain)
{
return power_domain_get_by_index(dev, power_domain, 0);
}
int power_domain_free(struct power_domain *power_domain)
{
struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
debug("%s(power_domain=%p)\n", __func__, power_domain);
return ops->rfree(power_domain);
}
int power_domain_on(struct power_domain *power_domain)
{
struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
debug("%s(power_domain=%p)\n", __func__, power_domain);
return ops->on(power_domain);
}
int power_domain_off(struct power_domain *power_domain)
{
struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
debug("%s(power_domain=%p)\n", __func__, power_domain);
return ops->off(power_domain);
}
#if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA))
static int dev_power_domain_ctrl(struct udevice *dev, bool on)
{
struct power_domain pd;
int i, count, ret = 0;
count = dev_count_phandle_with_args(dev, "power-domains",
"#power-domain-cells", 0);
for (i = 0; i < count; i++) {
ret = power_domain_get_by_index(dev, &pd, i);
if (ret)
return ret;
if (on)
ret = power_domain_on(&pd);
else
ret = power_domain_off(&pd);
}
/*
* For platforms with parent and child power-domain devices
* we may not run device_remove() on the power-domain parent
* because it will result in removing its children and switching
* off their power-domain parent. So we will get here again and
* again and will be stuck in an endless loop.
*/
if (!on && dev_get_parent(dev) == pd.dev &&
device_get_uclass_id(dev) == UCLASS_POWER_DOMAIN)
return ret;
/*
* power_domain_get() bound the device, thus
* we must remove it again to prevent unbinding
* active devices (which would result in unbind
* error).
*/
if (count > 0 && !on)
device_remove(pd.dev, DM_REMOVE_NORMAL);
return ret;
}
int dev_power_domain_on(struct udevice *dev)
{
return dev_power_domain_ctrl(dev, true);
}
int dev_power_domain_off(struct udevice *dev)
{
return dev_power_domain_ctrl(dev, false);
}
#endif
UCLASS_DRIVER(power_domain) = {
.id = UCLASS_POWER_DOMAIN,
.name = "power_domain",
};
|
