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
171
172
173
174
175
176
177
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014 NVIDIA Corporation
*/
#define pr_fmt(fmt) "as3722: " fmt
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <i2c.h>
#include <dm/lists.h>
#include <power/as3722.h>
#include <power/pmic.h>
#define AS3722_NUM_OF_REGS 0x92
static int as3722_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
int ret;
ret = dm_i2c_read(dev, reg, buff, len);
if (ret < 0)
return ret;
return 0;
}
static int as3722_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)
{
int ret;
ret = dm_i2c_write(dev, reg, buff, len);
if (ret < 0)
return ret;
return 0;
}
static int as3722_read_id(struct udevice *dev, uint *idp, uint *revisionp)
{
int ret;
ret = pmic_reg_read(dev, AS3722_ASIC_ID1);
if (ret < 0) {
pr_err("failed to read ID1 register: %d\n", ret);
return ret;
}
*idp = ret;
ret = pmic_reg_read(dev, AS3722_ASIC_ID2);
if (ret < 0) {
pr_err("failed to read ID2 register: %d\n", ret);
return ret;
}
*revisionp = ret;
return 0;
}
/* TODO(treding@nvidia.com): Add proper regulator support to avoid this */
int as3722_sd_set_voltage(struct udevice *dev, unsigned int sd, u8 value)
{
int ret;
if (sd > 6)
return -EINVAL;
ret = pmic_reg_write(dev, AS3722_SD_VOLTAGE(sd), value);
if (ret < 0) {
pr_err("failed to write SD%u voltage register: %d\n", sd, ret);
return ret;
}
return 0;
}
int as3722_ldo_set_voltage(struct udevice *dev, unsigned int ldo, u8 value)
{
int ret;
if (ldo > 11)
return -EINVAL;
ret = pmic_reg_write(dev, AS3722_LDO_VOLTAGE(ldo), value);
if (ret < 0) {
pr_err("failed to write LDO%u voltage register: %d\n", ldo,
ret);
return ret;
}
return 0;
}
static int as3722_probe(struct udevice *dev)
{
uint id, revision;
int ret;
ret = as3722_read_id(dev, &id, &revision);
if (ret < 0) {
pr_err("failed to read ID: %d\n", ret);
return ret;
}
if (id != AS3722_DEVICE_ID) {
pr_err("unknown device\n");
return -ENOENT;
}
debug("AS3722 revision %#x found on I2C bus %s\n", revision, dev->name);
return 0;
}
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "sd", .driver = "as3722_stepdown"},
{ .prefix = "ldo", .driver = "as3722_ldo"},
{ },
};
static int as3722_bind(struct udevice *dev)
{
struct udevice *gpio_dev;
ofnode regulators_node;
int children;
int ret;
regulators_node = dev_read_subnode(dev, "regulators");
if (!ofnode_valid(regulators_node)) {
debug("%s: %s regulators subnode not found\n", __func__,
dev->name);
return -ENXIO;
}
children = pmic_bind_children(dev, regulators_node, pmic_children_info);
if (!children)
debug("%s: %s - no child found\n", __func__, dev->name);
ret = device_bind_driver(dev, "gpio_as3722", "gpio_as3722", &gpio_dev);
if (ret) {
debug("%s: Cannot bind GPIOs (ret=%d)\n", __func__, ret);
return ret;
}
return 0;
}
#endif
static int as3722_reg_count(struct udevice *dev)
{
return AS3722_NUM_OF_REGS;
}
static struct dm_pmic_ops as3722_ops = {
.reg_count = as3722_reg_count,
.read = as3722_read,
.write = as3722_write,
};
static const struct udevice_id as3722_ids[] = {
{ .compatible = "ams,as3722" },
{ }
};
U_BOOT_DRIVER(pmic_as3722) = {
.name = "as3722_pmic",
.id = UCLASS_PMIC,
.of_match = as3722_ids,
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
.bind = as3722_bind,
#endif
.probe = as3722_probe,
.ops = &as3722_ops,
};
|
