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
|
/* NXP PCF50633 PMIC Driver
*
* (C) 2006-2008 by Openmoko, Inc.
* Author: Balaji Rao <balajirrao@openmoko.org>
* All rights reserved.
*
* Broken down from monstrous PCF50633 driver mainly by
* Harald Welte and Andy Green and Werner Almesberger
*
* 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.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/pmic.h>
#define PCF50633_REGULATOR(_name, _id, _n) \
{ \
.name = _name, \
.id = _id, \
.ops = &pcf50633_regulator_ops, \
.n_voltages = _n, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
[PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT,
[PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT,
[PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT,
[PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT,
[PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT,
[PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT,
[PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT,
[PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT,
[PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT,
[PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT,
[PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT,
};
/* Bits from voltage value */
static u8 auto_voltage_bits(unsigned int millivolts)
{
if (millivolts < 1800)
return 0;
if (millivolts > 3800)
return 0xff;
millivolts -= 625;
return millivolts / 25;
}
static u8 down_voltage_bits(unsigned int millivolts)
{
if (millivolts < 625)
return 0;
else if (millivolts > 3000)
return 0xff;
millivolts -= 625;
return millivolts / 25;
}
static u8 ldo_voltage_bits(unsigned int millivolts)
{
if (millivolts < 900)
return 0;
else if (millivolts > 3600)
return 0x1f;
millivolts -= 900;
return millivolts / 100;
}
/* Obtain voltage value from bits */
static unsigned int auto_voltage_value(u8 bits)
{
if (bits < 0x2f)
return 0;
return 625 + (bits * 25);
}
static unsigned int down_voltage_value(u8 bits)
{
return 625 + (bits * 25);
}
static unsigned int ldo_voltage_value(u8 bits)
{
bits &= 0x1f;
return 900 + (bits * 100);
}
static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned *selector)
{
struct pcf50633 *pcf;
int regulator_id, millivolts;
u8 volt_bits, regnr;
pcf = rdev_get_drvdata(rdev);
regulator_id = rdev_get_id(rdev);
if (regulator_id >= PCF50633_NUM_REGULATORS)
return -EINVAL;
millivolts = min_uV / 1000;
regnr = pcf50633_regulator_registers[regulator_id];
switch (regulator_id) {
case PCF50633_REGULATOR_AUTO:
volt_bits = auto_voltage_bits(millivolts);
break;
case PCF50633_REGULATOR_DOWN1:
volt_bits = down_voltage_bits(millivolts);
break;
case PCF50633_REGULATOR_DOWN2:
volt_bits = down_voltage_bits(millivolts);
break;
case PCF50633_REGULATOR_LDO1:
case PCF50633_REGULATOR_LDO2:
case PCF50633_REGULATOR_LDO3:
case PCF50633_REGULATOR_LDO4:
case PCF50633_REGULATOR_LDO5:
case PCF50633_REGULATOR_LDO6:
case PCF50633_REGULATOR_HCLDO:
volt_bits = ldo_voltage_bits(millivolts);
break;
default:
return -EINVAL;
}
*selector = volt_bits;
return pcf50633_reg_write(pcf, regnr, volt_bits);
}
static int pcf50633_regulator_voltage_value(enum pcf50633_regulator_id id,
u8 bits)
{
int millivolts;
switch (id) {
case PCF50633_REGULATOR_AUTO:
millivolts = auto_voltage_value(bits);
break;
case PCF50633_REGULATOR_DOWN1:
millivolts = down_voltage_value(bits);
break;
case PCF50633_REGULATOR_DOWN2:
millivolts = down_voltage_value(bits);
break;
case PCF50633_REGULATOR_LDO1:
case PCF50633_REGULATOR_LDO2:
case PCF50633_REGULATOR_LDO3:
case PCF50633_REGULATOR_LDO4:
case PCF50633_REGULATOR_LDO5:
case PCF50633_REGULATOR_LDO6:
case PCF50633_REGULATOR_HCLDO:
millivolts = ldo_voltage_value(bits);
break;
default:
return -EINVAL;
}
return millivolts * 1000;
}
static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev)
{
struct pcf50633 *pcf;
int regulator_id;
u8 volt_bits, regnr;
pcf = rdev_get_drvdata(rdev);
regulator_id = rdev_get_id(rdev);
if (regulator_id >= PCF50633_NUM_REGULATORS)
return -EINVAL;
regnr = pcf50633_regulator_registers[regulator_id];
volt_bits = pcf50633_reg_read(pcf, regnr);
return pcf50633_regulator_voltage_value(regulator_id, volt_bits);
}
static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
unsigned int index)
{
struct pcf50633 *pcf;
int regulator_id;
pcf = rdev_get_drvdata(rdev);
regulator_id = rdev_get_id(rdev);
switch (regulator_id) {
case PCF50633_REGULATOR_AUTO:
index += 0x2f;
break;
case PCF50633_REGULATOR_HCLDO:
index += 0x01;
break;
default:
break;
}
return pcf50633_regulator_voltage_value(regulator_id, index);
}
static int pcf50633_regulator_enable(struct regulator_dev *rdev)
{
struct pcf50633 *pcf = rdev_get_drvdata(rdev);
int regulator_id;
u8 regnr;
regulator_id = rdev_get_id(rdev);
if (regulator_id >= PCF50633_NUM_REGULATORS)
return -EINVAL;
/* The *ENA register is always one after the *OUT register */
regnr = pcf50633_regulator_registers[regulator_id] + 1;
return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON,
PCF50633_REGULATOR_ON);
}
static int pcf50633_regulator_disable(struct regulator_dev *rdev)
{
struct pcf50633 *pcf = rdev_get_drvdata(rdev);
int regulator_id;
u8 regnr;
regulator_id = rdev_get_id(rdev);
if (regulator_id >= PCF50633_NUM_REGULATORS)
return -EINVAL;
/* the *ENA register is always one after the *OUT register */
regnr = pcf50633_regulator_registers[regulator_id] + 1;
return pcf50633_reg_set_bit_mask(pcf, regnr,
PCF50633_REGULATOR_ON, 0);
}
static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev)
{
struct pcf50633 *pcf = rdev_get_drvdata(rdev);
int regulator_id = rdev_get_id(rdev);
u8 regnr;
regulator_id = rdev_get_id(rdev);
if (regulator_id >= PCF50633_NUM_REGULATORS)
return -EINVAL;
/* the *ENA register is always one after the *OUT register */
regnr = pcf50633_regulator_registers[regulator_id] + 1;
return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON;
}
static struct regulator_ops pcf50633_regulator_ops = {
.set_voltage = pcf50633_regulator_set_voltage,
.get_voltage = pcf50633_regulator_get_voltage,
.list_voltage = pcf50633_regulator_list_voltage,
.enable = pcf50633_regulator_enable,
.disable = pcf50633_regulator_disable,
.is_enabled = pcf50633_regulator_is_enabled,
};
static struct regulator_desc regulators[] = {
[PCF50633_REGULATOR_AUTO] =
PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO, 80),
[PCF50633_REGULATOR_DOWN1] =
PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1, 95),
[PCF50633_REGULATOR_DOWN2] =
PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2, 95),
[PCF50633_REGULATOR_LDO1] =
PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1, 27),
[PCF50633_REGULATOR_LDO2] =
PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2, 27),
[PCF50633_REGULATOR_LDO3] =
PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3, 27),
[PCF50633_REGULATOR_LDO4] =
PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4, 27),
[PCF50633_REGULATOR_LDO5] =
PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5, 27),
[PCF50633_REGULATOR_LDO6] =
PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6, 27),
[PCF50633_REGULATOR_HCLDO] =
PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO, 26),
[PCF50633_REGULATOR_MEMLDO] =
PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO, 0),
};
static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
{
struct regulator_dev *rdev;
struct pcf50633 *pcf;
/* Already set by core driver */
pcf = dev_to_pcf50633(pdev->dev.parent);
rdev = regulator_register(®ulators[pdev->id], &pdev->dev,
pdev->dev.platform_data, pcf);
if (IS_ERR(rdev))
return PTR_ERR(rdev);
platform_set_drvdata(pdev, rdev);
if (pcf->pdata->regulator_registered)
pcf->pdata->regulator_registered(pcf, pdev->id);
return 0;
}
static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
regulator_unregister(rdev);
return 0;
}
static struct platform_driver pcf50633_regulator_driver = {
.driver = {
.name = "pcf50633-regltr",
},
.probe = pcf50633_regulator_probe,
.remove = __devexit_p(pcf50633_regulator_remove),
};
static int __init pcf50633_regulator_init(void)
{
return platform_driver_register(&pcf50633_regulator_driver);
}
subsys_initcall(pcf50633_regulator_init);
static void __exit pcf50633_regulator_exit(void)
{
platform_driver_unregister(&pcf50633_regulator_driver);
}
module_exit(pcf50633_regulator_exit);
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("PCF50633 regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50633-regulator");
|
