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
|
// SPDX-License-Identifier: GPL-2.0-only
// Copyright Axis Communications AB
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>
#include <dt-bindings/regulator/ti,tps62864.h>
#define TPS6286X_VOUT1 0x01
#define TPS6286X_VOUT1_VO1_SET GENMASK(7, 0)
#define TPS6286X_CONTROL 0x03
#define TPS6286X_CONTROL_FPWM BIT(4)
#define TPS6286X_CONTROL_SWEN BIT(5)
#define TPS6286X_MIN_MV 400
#define TPS6286X_MAX_MV 1675
#define TPS6286X_STEP_MV 5
static const struct regmap_config tps6286x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static int tps6286x_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
unsigned int val;
switch (mode) {
case REGULATOR_MODE_NORMAL:
val = 0;
break;
case REGULATOR_MODE_FAST:
val = TPS6286X_CONTROL_FPWM;
break;
default:
return -EINVAL;
}
return regmap_update_bits(rdev->regmap, TPS6286X_CONTROL,
TPS6286X_CONTROL_FPWM, val);
}
static unsigned int tps6286x_get_mode(struct regulator_dev *rdev)
{
unsigned int val;
int ret;
ret = regmap_read(rdev->regmap, TPS6286X_CONTROL, &val);
if (ret < 0)
return 0;
return (val & TPS6286X_CONTROL_FPWM) ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
}
static const struct regulator_ops tps6286x_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps6286x_set_mode,
.get_mode = tps6286x_get_mode,
.is_enabled = regulator_is_enabled_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
};
static unsigned int tps6286x_of_map_mode(unsigned int mode)
{
switch (mode) {
case TPS62864_MODE_NORMAL:
return REGULATOR_MODE_NORMAL;
case TPS62864_MODE_FPWM:
return REGULATOR_MODE_FAST;
default:
return REGULATOR_MODE_INVALID;
}
}
static const struct regulator_desc tps6286x_reg = {
.name = "tps6286x",
.of_match = of_match_ptr("SW"),
.owner = THIS_MODULE,
.ops = &tps6286x_regulator_ops,
.of_map_mode = tps6286x_of_map_mode,
.regulators_node = of_match_ptr("regulators"),
.type = REGULATOR_VOLTAGE,
.n_voltages = ((TPS6286X_MAX_MV - TPS6286X_MIN_MV) / TPS6286X_STEP_MV) + 1,
.min_uV = TPS6286X_MIN_MV * 1000,
.uV_step = TPS6286X_STEP_MV * 1000,
.vsel_reg = TPS6286X_VOUT1,
.vsel_mask = TPS6286X_VOUT1_VO1_SET,
.enable_reg = TPS6286X_CONTROL,
.enable_mask = TPS6286X_CONTROL_SWEN,
.ramp_delay = 1000,
/* tDelay + tRamp, rounded up */
.enable_time = 3000,
};
static const struct of_device_id tps6286x_dt_ids[] = {
{ .compatible = "ti,tps62864", },
{ .compatible = "ti,tps62866", },
{ .compatible = "ti,tps62868", },
{ .compatible = "ti,tps62869", },
{ }
};
MODULE_DEVICE_TABLE(of, tps6286x_dt_ids);
static int tps6286x_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct device *dev = &i2c->dev;
struct regulator_config config = {};
struct regulator_dev *rdev;
struct regmap *regmap;
regmap = devm_regmap_init_i2c(i2c, &tps6286x_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
config.dev = &i2c->dev;
config.of_node = dev->of_node;
config.regmap = regmap;
rdev = devm_regulator_register(&i2c->dev, &tps6286x_reg, &config);
if (IS_ERR(rdev)) {
dev_err(&i2c->dev, "Failed to register tps6286x regulator\n");
return PTR_ERR(rdev);
}
return 0;
}
static const struct i2c_device_id tps6286x_i2c_id[] = {
{ "tps62864", 0 },
{ "tps62866", 0 },
{ "tps62868", 0 },
{ "tps62869", 0 },
{},
};
MODULE_DEVICE_TABLE(i2c, tps6286x_i2c_id);
static struct i2c_driver tps6286x_regulator_driver = {
.driver = {
.name = "tps6286x",
.of_match_table = of_match_ptr(tps6286x_dt_ids),
},
.probe = tps6286x_i2c_probe,
.id_table = tps6286x_i2c_id,
};
module_i2c_driver(tps6286x_regulator_driver);
MODULE_LICENSE("GPL v2");
|
