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
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
|
/*
* max8907c-regulator.c -- support regulators in max8907c
*
* Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/max8907c.h>
#include <linux/regulator/max8907c-regulator.h>
#define MAX8907C_II2RR_VERSION_MASK 0xF0
#define MAX8907C_II2RR_VERSION_REV_A 0x00
#define MAX8907C_II2RR_VERSION_REV_B 0x10
#define MAX8907C_II2RR_VERSION_REV_C 0x30
#define MAX8907C_REGULATOR_CNT (ARRAY_SIZE(max8907c_regulators))
struct max8907c_regulator_info {
u32 min_uV;
u32 max_uV;
u32 step_uV;
u8 reg_base;
u32 enable_time_us;
struct regulator_desc desc;
struct i2c_client *i2c;
};
#define REG_LDO(ids, base, min, max, step) \
{ \
.min_uV = (min), \
.max_uV = (max), \
.step_uV = (step), \
.reg_base = (base), \
.desc = { \
.name = #ids, \
.id = MAX8907C_##ids, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &max8907c_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define REG_FIXED(ids, voltage) \
{ \
.min_uV = (voltage), \
.max_uV = (voltage), \
.desc = { \
.name = #ids, \
.id = MAX8907C_##ids, \
.n_voltages = 1, \
.ops = &max8907c_fixed_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define REG_OUT5V(ids, base, voltage) \
{ \
.min_uV = (voltage), \
.max_uV = (voltage), \
.reg_base = (base), \
.desc = { \
.name = #ids, \
.id = MAX8907C_##ids, \
.n_voltages = 1, \
.ops = &max8907c_out5v_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define REG_BBAT(ids, base, min, max, step) \
{ \
.min_uV = (min), \
.max_uV = (max), \
.step_uV = (step), \
.reg_base = (base), \
.desc = { \
.name = #ids, \
.id = MAX8907C_##ids, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &max8907c_bbat_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
#define REG_WLED(ids, base, voltage) \
{ \
.min_uV = (voltage), \
.max_uV = (voltage), \
.reg_base = (base), \
.desc = { \
.name = #ids, \
.id = MAX8907C_##ids, \
.n_voltages = 1, \
.ops = &max8907c_wled_ops, \
.type = REGULATOR_CURRENT, \
.owner = THIS_MODULE, \
}, \
}
#define LDO_750_50(id, base) REG_LDO(id, (base), 750000, 3900000, 50000)
#define LDO_650_25(id, base) REG_LDO(id, (base), 650000, 2225000, 25000)
static int max8907c_regulator_list_voltage(struct regulator_dev *dev,
unsigned index);
static int max8907c_regulator_ldo_set_voltage(struct regulator_dev *dev,
int min_uV, int max_uV);
static int max8907c_regulator_bbat_set_voltage(struct regulator_dev *dev,
int min_uV, int max_uV);
static int max8907c_regulator_ldo_get_voltage(struct regulator_dev *dev);
static int max8907c_regulator_fixed_get_voltage(struct regulator_dev *dev);
static int max8907c_regulator_bbat_get_voltage(struct regulator_dev *dev);
static int max8907c_regulator_wled_set_current_limit(struct regulator_dev *dev,
int min_uA, int max_uA);
static int max8907c_regulator_wled_get_current_limit(struct regulator_dev *dev);
static int max8907c_regulator_ldo_enable(struct regulator_dev *dev);
static int max8907c_regulator_out5v_enable(struct regulator_dev *dev);
static int max8907c_regulator_ldo_disable(struct regulator_dev *dev);
static int max8907c_regulator_out5v_disable(struct regulator_dev *dev);
static int max8907c_regulator_ldo_is_enabled(struct regulator_dev *dev);
static int max8907c_regulator_ldo_enable_time(struct regulator_dev *dev);
static int max8907c_regulator_out5v_is_enabled(struct regulator_dev *dev);
static struct regulator_ops max8907c_ldo_ops = {
.list_voltage = max8907c_regulator_list_voltage,
.set_voltage = max8907c_regulator_ldo_set_voltage,
.get_voltage = max8907c_regulator_ldo_get_voltage,
.enable = max8907c_regulator_ldo_enable,
.disable = max8907c_regulator_ldo_disable,
.is_enabled = max8907c_regulator_ldo_is_enabled,
.enable_time = max8907c_regulator_ldo_enable_time,
};
static struct regulator_ops max8907c_fixed_ops = {
.list_voltage = max8907c_regulator_list_voltage,
.get_voltage = max8907c_regulator_fixed_get_voltage,
};
static struct regulator_ops max8907c_out5v_ops = {
.list_voltage = max8907c_regulator_list_voltage,
.get_voltage = max8907c_regulator_fixed_get_voltage,
.enable = max8907c_regulator_out5v_enable,
.disable = max8907c_regulator_out5v_disable,
.is_enabled = max8907c_regulator_out5v_is_enabled,
};
static struct regulator_ops max8907c_bbat_ops = {
.list_voltage = max8907c_regulator_list_voltage,
.set_voltage = max8907c_regulator_bbat_set_voltage,
.get_voltage = max8907c_regulator_bbat_get_voltage,
};
static struct regulator_ops max8907c_wled_ops = {
.list_voltage = max8907c_regulator_list_voltage,
.set_current_limit = max8907c_regulator_wled_set_current_limit,
.get_current_limit = max8907c_regulator_wled_get_current_limit,
.get_voltage = max8907c_regulator_fixed_get_voltage,
};
static struct max8907c_regulator_info max8907c_regulators[] = {
REG_LDO(SD1, MAX8907C_REG_SDCTL1, 650000, 2225000, 25000),
REG_LDO(SD2, MAX8907C_REG_SDCTL2, 637500, 1425000, 12500),
REG_LDO(SD3, MAX8907C_REG_SDCTL3, 750000, 3900000, 50000),
LDO_750_50(LDO1, MAX8907C_REG_LDOCTL1),
LDO_650_25(LDO2, MAX8907C_REG_LDOCTL2),
LDO_650_25(LDO3, MAX8907C_REG_LDOCTL3),
LDO_750_50(LDO4, MAX8907C_REG_LDOCTL4),
LDO_750_50(LDO5, MAX8907C_REG_LDOCTL5),
LDO_750_50(LDO6, MAX8907C_REG_LDOCTL6),
LDO_750_50(LDO7, MAX8907C_REG_LDOCTL7),
LDO_750_50(LDO8, MAX8907C_REG_LDOCTL8),
LDO_750_50(LDO9, MAX8907C_REG_LDOCTL9),
LDO_750_50(LDO10, MAX8907C_REG_LDOCTL10),
LDO_750_50(LDO11, MAX8907C_REG_LDOCTL11),
LDO_750_50(LDO12, MAX8907C_REG_LDOCTL12),
LDO_750_50(LDO13, MAX8907C_REG_LDOCTL13),
LDO_750_50(LDO14, MAX8907C_REG_LDOCTL14),
LDO_750_50(LDO15, MAX8907C_REG_LDOCTL15),
LDO_750_50(LDO16, MAX8907C_REG_LDOCTL16),
LDO_650_25(LDO17, MAX8907C_REG_LDOCTL17),
LDO_650_25(LDO18, MAX8907C_REG_LDOCTL18),
LDO_750_50(LDO19, MAX8907C_REG_LDOCTL19),
LDO_750_50(LDO20, MAX8907C_REG_LDOCTL20),
REG_OUT5V(OUT5V, MAX8907C_REG_OUT5VEN, 5000000),
REG_OUT5V(OUT33V, MAX8907C_REG_OUT33VEN, 3300000),
REG_BBAT(BBAT, MAX8907C_REG_BBAT_CNFG, 2400000, 3000000, 200000),
REG_FIXED(SDBY, 1200000),
REG_FIXED(VRTC, 3300000),
REG_WLED(WLED, MAX8907C_REG_ILED_CNTL, 0),
};
static int max8907c_regulator_list_voltage(struct regulator_dev *rdev,
unsigned index)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
return info->min_uV + info->step_uV * index;
}
static int max8907c_regulator_ldo_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
int val;
if (min_uV < info->min_uV || max_uV > info->max_uV)
return -EDOM;
val = (min_uV - info->min_uV) / info->step_uV;
return max8907c_reg_write(info->i2c, info->reg_base + MAX8907C_VOUT, val);
}
static int max8907c_regulator_bbat_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
int val;
if (min_uV < info->min_uV || max_uV > info->max_uV)
return -EDOM;
val = (min_uV - info->min_uV) / info->step_uV;
return max8907c_set_bits(info->i2c, info->reg_base, MAX8907C_MASK_VBBATTCV,
val);
}
static int max8907c_regulator_ldo_get_voltage(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
int val;
val = max8907c_reg_read(info->i2c, info->reg_base + MAX8907C_VOUT);
return val * info->step_uV + info->min_uV;
}
static int max8907c_regulator_fixed_get_voltage(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
return info->min_uV;
}
static int max8907c_regulator_bbat_get_voltage(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
int val;
val =
max8907c_reg_read(info->i2c, info->reg_base) & MAX8907C_MASK_VBBATTCV;
return val * info->step_uV + info->min_uV;
}
static int max8907c_regulator_wled_set_current_limit(struct regulator_dev *rdev,
int min_uA, int max_uA)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
if (min_uA > 25500)
return -EDOM;
return max8907c_reg_write(info->i2c, info->reg_base, min_uA / 100);
}
static int max8907c_regulator_wled_get_current_limit(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
int val;
val = max8907c_reg_read(info->i2c, info->reg_base);
return val * 100;
}
static int max8907c_regulator_ldo_enable(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
return max8907c_set_bits(info->i2c, info->reg_base + MAX8907C_CTL,
MAX8907C_MASK_LDO_EN | MAX8907C_MASK_LDO_SEQ,
MAX8907C_MASK_LDO_EN | MAX8907C_MASK_LDO_SEQ);
}
static int max8907c_regulator_out5v_enable(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
return max8907c_set_bits(info->i2c, info->reg_base,
MAX8907C_MASK_OUT5V_VINEN |
MAX8907C_MASK_OUT5V_ENSRC |
MAX8907C_MASK_OUT5V_EN,
MAX8907C_MASK_OUT5V_ENSRC |
MAX8907C_MASK_OUT5V_EN);
}
static int max8907c_regulator_ldo_disable(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
return max8907c_set_bits(info->i2c, info->reg_base + MAX8907C_CTL,
MAX8907C_MASK_LDO_EN | MAX8907C_MASK_LDO_SEQ,
MAX8907C_MASK_LDO_SEQ);
}
static int max8907c_regulator_out5v_disable(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
return max8907c_set_bits(info->i2c, info->reg_base,
MAX8907C_MASK_OUT5V_VINEN |
MAX8907C_MASK_OUT5V_ENSRC |
MAX8907C_MASK_OUT5V_EN,
MAX8907C_MASK_OUT5V_ENSRC);
}
static int max8907c_regulator_ldo_is_enabled(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
int val;
val = max8907c_reg_read(info->i2c, info->reg_base + MAX8907C_CTL);
if (val < 0)
return -EDOM;
return (val & MAX8907C_MASK_LDO_EN) || !(val & MAX8907C_MASK_LDO_SEQ);
}
static int max8907c_regulator_ldo_enable_time(struct regulator_dev *rdev)
{
struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
return info->enable_time_us;
}
static int max8907c_regulator_out5v_is_enabled(struct regulator_dev *rdev)
{
const struct max8907c_regulator_info *info = rdev_get_drvdata(rdev);
int val;
val = max8907c_reg_read(info->i2c, info->reg_base);
if (val < 0)
return -EDOM;
if ((val &
(MAX8907C_MASK_OUT5V_VINEN | MAX8907C_MASK_OUT5V_ENSRC |
MAX8907C_MASK_OUT5V_EN))
== MAX8907C_MASK_OUT5V_ENSRC)
return 1;
return 0;
}
static int max8907c_regulator_probe(struct platform_device *pdev)
{
struct max8907c *max8907c = dev_get_drvdata(pdev->dev.parent);
struct max8907c_regulator_info *info;
struct regulator_dev *rdev;
struct regulator_init_data *p = pdev->dev.platform_data;
struct max8907c_chip_regulator_data *chip_data = p->driver_data;;
u8 version;
/* Backwards compatibility with max8907b, SD1 uses different voltages */
version = max8907c_reg_read(max8907c->i2c_power, MAX8907C_REG_II2RR);
if ((version & MAX8907C_II2RR_VERSION_MASK) == MAX8907C_II2RR_VERSION_REV_B) {
max8907c_regulators[MAX8907C_SD1].min_uV = 637500;
max8907c_regulators[MAX8907C_SD1].max_uV = 1425000;
max8907c_regulators[MAX8907C_SD1].step_uV = 12500;
}
info = &max8907c_regulators[pdev->id];
info->i2c = max8907c->i2c_power;
if (chip_data != NULL)
info->enable_time_us = chip_data->enable_time_us;
rdev = regulator_register(&info->desc,
&pdev->dev, pdev->dev.platform_data, info);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "Cannot register regulator \"%s\", %ld\n",
info->desc.name, PTR_ERR(rdev));
goto error;
}
platform_set_drvdata(pdev, rdev);
return 0;
error:
return PTR_ERR(rdev);
}
static int max8907c_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
regulator_unregister(rdev);
return 0;
}
static struct platform_driver max8907c_regulator_driver = {
.driver = {
.name = "max8907c-regulator",
.owner = THIS_MODULE,
},
.probe = max8907c_regulator_probe,
.remove = __devexit_p(max8907c_regulator_remove),
};
static int __init max8907c_regulator_init(void)
{
return platform_driver_register(&max8907c_regulator_driver);
}
subsys_initcall(max8907c_regulator_init);
static void __exit max8907c_reg_exit(void)
{
platform_driver_unregister(&max8907c_regulator_driver);
}
module_exit(max8907c_reg_exit);
MODULE_DESCRIPTION("MAX8907C regulator driver");
MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
MODULE_LICENSE("GPL");
|
