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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/*
* Regulator driver for LP87565 PMIC
*
* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/lp87565.h>
#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \
_delay, _lr, _cr) \
[_id] = { \
.desc = { \
.name = _name, \
.supply_name = _of "-in", \
.id = _id, \
.of_match = of_match_ptr(_of), \
.regulators_node = of_match_ptr("regulators"),\
.ops = &_ops, \
.n_voltages = _n, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.vsel_reg = _vr, \
.vsel_mask = _vm, \
.enable_reg = _er, \
.enable_mask = _em, \
.ramp_delay = _delay, \
.linear_ranges = _lr, \
.n_linear_ranges = ARRAY_SIZE(_lr), \
}, \
.ctrl2_reg = _cr, \
}
struct lp87565_regulator {
struct regulator_desc desc;
unsigned int ctrl2_reg;
};
static const struct lp87565_regulator regulators[];
static const struct regulator_linear_range buck0_1_2_3_ranges[] = {
REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),
REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
};
static unsigned int lp87565_buck_ramp_delay[] = {
30000, 15000, 10000, 7500, 3800, 1900, 940, 470
};
/* LP87565 BUCK current limit */
static const unsigned int lp87565_buck_uA[] = {
1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,
};
static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,
int ramp_delay)
{
int id = rdev_get_id(rdev);
struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
unsigned int reg;
int ret;
if (ramp_delay <= 470)
reg = 7;
else if (ramp_delay <= 940)
reg = 6;
else if (ramp_delay <= 1900)
reg = 5;
else if (ramp_delay <= 3800)
reg = 4;
else if (ramp_delay <= 7500)
reg = 3;
else if (ramp_delay <= 10000)
reg = 2;
else if (ramp_delay <= 15000)
reg = 1;
else
reg = 0;
ret = regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg,
LP87565_BUCK_CTRL_2_SLEW_RATE,
reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE));
if (ret) {
dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret);
return ret;
}
rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg];
/* Conservatively give a 15% margin */
rdev->constraints->ramp_delay =
rdev->constraints->ramp_delay * 85 / 100;
return 0;
}
static int lp87565_buck_set_current_limit(struct regulator_dev *rdev,
int min_uA, int max_uA)
{
int id = rdev_get_id(rdev);
struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
int i;
for (i = ARRAY_SIZE(lp87565_buck_uA) - 1; i >= 0; i--) {
if (lp87565_buck_uA[i] >= min_uA &&
lp87565_buck_uA[i] <= max_uA)
return regmap_update_bits(lp87565->regmap,
regulators[id].ctrl2_reg,
LP87565_BUCK_CTRL_2_ILIM,
i << __ffs(LP87565_BUCK_CTRL_2_ILIM));
}
return -EINVAL;
}
static int lp87565_buck_get_current_limit(struct regulator_dev *rdev)
{
int id = rdev_get_id(rdev);
struct lp87565 *lp87565 = rdev_get_drvdata(rdev);
int ret;
unsigned int val;
ret = regmap_read(lp87565->regmap, regulators[id].ctrl2_reg, &val);
if (ret)
return ret;
val = (val & LP87565_BUCK_CTRL_2_ILIM) >>
__ffs(LP87565_BUCK_CTRL_2_ILIM);
return (val < ARRAY_SIZE(lp87565_buck_uA)) ?
lp87565_buck_uA[val] : -EINVAL;
}
/* Operations permitted on BUCK0, BUCK1 */
static struct regulator_ops lp87565_buck_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = lp87565_buck_set_ramp_delay,
.set_current_limit = lp87565_buck_set_current_limit,
.get_current_limit = lp87565_buck_get_current_limit,
};
static const struct lp87565_regulator regulators[] = {
LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops,
256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
LP87565_REG_BUCK0_CTRL_1,
LP87565_BUCK_CTRL_1_EN, 3230,
buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,
256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,
LP87565_REG_BUCK1_CTRL_1,
LP87565_BUCK_CTRL_1_EN, 3230,
buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),
LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,
256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
LP87565_REG_BUCK2_CTRL_1,
LP87565_BUCK_CTRL_1_EN, 3230,
buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,
256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,
LP87565_REG_BUCK3_CTRL_1,
LP87565_BUCK_CTRL_1_EN, 3230,
buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),
LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,
256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
LP87565_REG_BUCK0_CTRL_1,
LP87565_BUCK_CTRL_1_EN |
LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,
256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
LP87565_REG_BUCK2_CTRL_1,
LP87565_BUCK_CTRL_1_EN, 3230,
buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
};
static int lp87565_regulator_probe(struct platform_device *pdev)
{
struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);
struct regulator_config config = { };
struct regulator_dev *rdev;
int i, min_idx = LP87565_BUCK_0, max_idx = LP87565_BUCK_3;
platform_set_drvdata(pdev, lp87565);
config.dev = &pdev->dev;
config.dev->of_node = lp87565->dev->of_node;
config.driver_data = lp87565;
config.regmap = lp87565->regmap;
if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) {
min_idx = LP87565_BUCK_10;
max_idx = LP87565_BUCK_23;
}
for (i = min_idx; i <= max_idx; i++) {
rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc,
&config);
if (IS_ERR(rdev)) {
dev_err(lp87565->dev, "failed to register %s regulator\n",
pdev->name);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct platform_device_id lp87565_regulator_id_table[] = {
{ "lp87565-regulator", },
{ "lp87565-q1-regulator", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);
static struct platform_driver lp87565_regulator_driver = {
.driver = {
.name = "lp87565-pmic",
},
.probe = lp87565_regulator_probe,
.id_table = lp87565_regulator_id_table,
};
module_platform_driver(lp87565_regulator_driver);
MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
MODULE_DESCRIPTION("LP87565 voltage regulator driver");
MODULE_LICENSE("GPL v2");
|
