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
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
|
/*
* act8865-regulator.c - Voltage regulation for the active-semi ACT8865
* http://www.active-semi.com/sheets/ACT8865_Datasheet.pdf
*
* Copyright (C) 2013 Atmel Corporation
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/act8865.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regmap.h>
/*
* ACT8865 Global Register Map.
*/
#define ACT8865_SYS_MODE 0x00
#define ACT8865_SYS_CTRL 0x01
#define ACT8865_DCDC1_VSET1 0x20
#define ACT8865_DCDC1_VSET2 0x21
#define ACT8865_DCDC1_CTRL 0x22
#define ACT8865_DCDC2_VSET1 0x30
#define ACT8865_DCDC2_VSET2 0x31
#define ACT8865_DCDC2_CTRL 0x32
#define ACT8865_DCDC3_VSET1 0x40
#define ACT8865_DCDC3_VSET2 0x41
#define ACT8865_DCDC3_CTRL 0x42
#define ACT8865_LDO1_VSET 0x50
#define ACT8865_LDO1_CTRL 0x51
#define ACT8865_LDO2_VSET 0x54
#define ACT8865_LDO2_CTRL 0x55
#define ACT8865_LDO3_VSET 0x60
#define ACT8865_LDO3_CTRL 0x61
#define ACT8865_LDO4_VSET 0x64
#define ACT8865_LDO4_CTRL 0x65
/*
* Field Definitions.
*/
#define ACT8865_ENA 0x80 /* ON - [7] */
#define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */
/*
* ACT8865 voltage number
*/
#define ACT8865_VOLTAGE_NUM 64
struct act8865 {
struct regulator_dev *rdev[ACT8865_REG_NUM];
struct regmap *regmap;
};
static const struct regmap_config act8865_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct regulator_linear_range act8865_volatge_ranges[] = {
REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
};
static struct regulator_ops act8865_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static const struct regulator_desc act8865_reg[] = {
{
.name = "DCDC_REG1",
.id = ACT8865_ID_DCDC1,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8865_VOLTAGE_NUM,
.linear_ranges = act8865_volatge_ranges,
.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
.vsel_reg = ACT8865_DCDC1_VSET1,
.vsel_mask = ACT8865_VSEL_MASK,
.enable_reg = ACT8865_DCDC1_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
{
.name = "DCDC_REG2",
.id = ACT8865_ID_DCDC2,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8865_VOLTAGE_NUM,
.linear_ranges = act8865_volatge_ranges,
.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
.vsel_reg = ACT8865_DCDC2_VSET1,
.vsel_mask = ACT8865_VSEL_MASK,
.enable_reg = ACT8865_DCDC2_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
{
.name = "DCDC_REG3",
.id = ACT8865_ID_DCDC3,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8865_VOLTAGE_NUM,
.linear_ranges = act8865_volatge_ranges,
.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
.vsel_reg = ACT8865_DCDC3_VSET1,
.vsel_mask = ACT8865_VSEL_MASK,
.enable_reg = ACT8865_DCDC3_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO_REG1",
.id = ACT8865_ID_LDO1,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8865_VOLTAGE_NUM,
.linear_ranges = act8865_volatge_ranges,
.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
.vsel_reg = ACT8865_LDO1_VSET,
.vsel_mask = ACT8865_VSEL_MASK,
.enable_reg = ACT8865_LDO1_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO_REG2",
.id = ACT8865_ID_LDO2,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8865_VOLTAGE_NUM,
.linear_ranges = act8865_volatge_ranges,
.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
.vsel_reg = ACT8865_LDO2_VSET,
.vsel_mask = ACT8865_VSEL_MASK,
.enable_reg = ACT8865_LDO2_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO_REG3",
.id = ACT8865_ID_LDO3,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8865_VOLTAGE_NUM,
.linear_ranges = act8865_volatge_ranges,
.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
.vsel_reg = ACT8865_LDO3_VSET,
.vsel_mask = ACT8865_VSEL_MASK,
.enable_reg = ACT8865_LDO3_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO_REG4",
.id = ACT8865_ID_LDO4,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8865_VOLTAGE_NUM,
.linear_ranges = act8865_volatge_ranges,
.n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
.vsel_reg = ACT8865_LDO4_VSET,
.vsel_mask = ACT8865_VSEL_MASK,
.enable_reg = ACT8865_LDO4_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
};
#ifdef CONFIG_OF
static const struct of_device_id act8865_dt_ids[] = {
{ .compatible = "active-semi,act8865" },
{ }
};
MODULE_DEVICE_TABLE(of, act8865_dt_ids);
static struct of_regulator_match act8865_matches[] = {
[ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"},
[ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"},
[ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"},
[ACT8865_ID_LDO1] = { .name = "LDO_REG1"},
[ACT8865_ID_LDO2] = { .name = "LDO_REG2"},
[ACT8865_ID_LDO3] = { .name = "LDO_REG3"},
[ACT8865_ID_LDO4] = { .name = "LDO_REG4"},
};
static int act8865_pdata_from_dt(struct device *dev,
struct device_node **of_node,
struct act8865_platform_data *pdata)
{
int matched, i;
struct device_node *np;
struct act8865_regulator_data *regulator;
np = of_find_node_by_name(dev->of_node, "regulators");
if (!np) {
dev_err(dev, "missing 'regulators' subnode in DT\n");
return -EINVAL;
}
matched = of_regulator_match(dev, np,
act8865_matches, ARRAY_SIZE(act8865_matches));
if (matched <= 0)
return matched;
pdata->regulators = devm_kzalloc(dev,
sizeof(struct act8865_regulator_data) *
ARRAY_SIZE(act8865_matches), GFP_KERNEL);
if (!pdata->regulators) {
dev_err(dev, "%s: failed to allocate act8865 registor\n",
__func__);
return -ENOMEM;
}
pdata->num_regulators = matched;
regulator = pdata->regulators;
for (i = 0; i < ARRAY_SIZE(act8865_matches); i++) {
regulator->id = i;
regulator->name = act8865_matches[i].name;
regulator->platform_data = act8865_matches[i].init_data;
of_node[i] = act8865_matches[i].of_node;
regulator++;
}
return 0;
}
#else
static inline int act8865_pdata_from_dt(struct device *dev,
struct device_node **of_node,
struct act8865_platform_data *pdata)
{
return 0;
}
#endif
static int act8865_pmic_probe(struct i2c_client *client,
const struct i2c_device_id *i2c_id)
{
struct regulator_dev **rdev;
struct device *dev = &client->dev;
struct act8865_platform_data *pdata = dev_get_platdata(dev);
struct regulator_config config = { };
struct act8865 *act8865;
struct device_node *of_node[ACT8865_REG_NUM];
int i, id;
int ret = -EINVAL;
int error;
if (dev->of_node && !pdata) {
const struct of_device_id *id;
struct act8865_platform_data pdata_of;
id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
if (!id)
return -ENODEV;
ret = act8865_pdata_from_dt(dev, of_node, &pdata_of);
if (ret < 0)
return ret;
pdata = &pdata_of;
}
if (pdata->num_regulators > ACT8865_REG_NUM) {
dev_err(dev, "Too many regulators found!\n");
return -EINVAL;
}
act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
if (!act8865)
return -ENOMEM;
rdev = act8865->rdev;
act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config);
if (IS_ERR(act8865->regmap)) {
error = PTR_ERR(act8865->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
error);
return error;
}
/* Finally register devices */
for (i = 0; i < ACT8865_REG_NUM; i++) {
id = pdata->regulators[i].id;
config.dev = dev;
config.init_data = pdata->regulators[i].platform_data;
config.of_node = of_node[i];
config.driver_data = act8865;
config.regmap = act8865->regmap;
rdev[i] = devm_regulator_register(&client->dev,
&act8865_reg[i], &config);
if (IS_ERR(rdev[i])) {
dev_err(dev, "failed to register %s\n",
act8865_reg[id].name);
return PTR_ERR(rdev[i]);
}
}
i2c_set_clientdata(client, act8865);
return 0;
}
static const struct i2c_device_id act8865_ids[] = {
{ "act8865", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, act8865_ids);
static struct i2c_driver act8865_pmic_driver = {
.driver = {
.name = "act8865",
.owner = THIS_MODULE,
},
.probe = act8865_pmic_probe,
.id_table = act8865_ids,
};
module_i2c_driver(act8865_pmic_driver);
MODULE_DESCRIPTION("active-semi act8865 voltage regulator driver");
MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
MODULE_LICENSE("GPL v2");
|
