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
|
/*
* max77686.c - Regulator driver for the Maxim 77686
*
* Copyright (C) 2012 Samsung Electronics
* Chiwoong Byun <woong.byun@smasung.com>
* Jonghwa Lee <jonghwa3.lee@samsung.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; 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* This driver is based on max8997.c
*/
#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
#define MAX77686_LDO_MINUV 800000
#define MAX77686_LDO_UVSTEP 50000
#define MAX77686_LDO_LOW_MINUV 800000
#define MAX77686_LDO_LOW_UVSTEP 25000
#define MAX77686_BUCK_MINUV 750000
#define MAX77686_BUCK_UVSTEP 50000
#define MAX77686_RAMP_DELAY 100000 /* uV/us */
#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
#define MAX77686_DVS_MINUV 600000
#define MAX77686_DVS_UVSTEP 12500
#define MAX77686_OPMODE_SHIFT 6
#define MAX77686_OPMODE_BUCK234_SHIFT 4
#define MAX77686_OPMODE_MASK 0x3
#define MAX77686_VSEL_MASK 0x3F
#define MAX77686_DVS_VSEL_MASK 0xFF
#define MAX77686_RAMP_RATE_MASK 0xC0
#define MAX77686_REGULATORS MAX77686_REG_MAX
#define MAX77686_LDOS 26
enum max77686_ramp_rate {
RAMP_RATE_13P75MV,
RAMP_RATE_27P5MV,
RAMP_RATE_55MV,
RAMP_RATE_NO_CTRL, /* 100mV/us */
};
struct max77686_data {
struct regulator_dev **rdev;
};
static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
unsigned int ramp_value = RAMP_RATE_NO_CTRL;
switch (ramp_delay) {
case 1 ... 13750:
ramp_value = RAMP_RATE_13P75MV;
break;
case 13751 ... 27500:
ramp_value = RAMP_RATE_27P5MV;
break;
case 27501 ... 55000:
ramp_value = RAMP_RATE_55MV;
break;
case 55001 ... 100000:
break;
default:
pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
rdev->desc->name, ramp_delay);
}
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
MAX77686_RAMP_RATE_MASK, ramp_value << 6);
}
static struct regulator_ops max77686_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.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,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
static struct regulator_ops max77686_buck_dvs_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.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,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = max77686_set_ramp_delay,
};
#define regulator_desc_ldo(num) { \
.name = "LDO"#num, \
.id = MAX77686_LDO##num, \
.ops = &max77686_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MAX77686_LDO_MINUV, \
.uV_step = MAX77686_LDO_UVSTEP, \
.ramp_delay = MAX77686_RAMP_DELAY, \
.n_voltages = MAX77686_VSEL_MASK + 1, \
.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
.vsel_mask = MAX77686_VSEL_MASK, \
.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
.enable_mask = MAX77686_OPMODE_MASK \
<< MAX77686_OPMODE_SHIFT, \
}
#define regulator_desc_ldo_low(num) { \
.name = "LDO"#num, \
.id = MAX77686_LDO##num, \
.ops = &max77686_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MAX77686_LDO_LOW_MINUV, \
.uV_step = MAX77686_LDO_LOW_UVSTEP, \
.ramp_delay = MAX77686_RAMP_DELAY, \
.n_voltages = MAX77686_VSEL_MASK + 1, \
.vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
.vsel_mask = MAX77686_VSEL_MASK, \
.enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
.enable_mask = MAX77686_OPMODE_MASK \
<< MAX77686_OPMODE_SHIFT, \
}
#define regulator_desc_buck(num) { \
.name = "BUCK"#num, \
.id = MAX77686_BUCK##num, \
.ops = &max77686_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MAX77686_BUCK_MINUV, \
.uV_step = MAX77686_BUCK_UVSTEP, \
.ramp_delay = MAX77686_RAMP_DELAY, \
.n_voltages = MAX77686_VSEL_MASK + 1, \
.vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
.vsel_mask = MAX77686_VSEL_MASK, \
.enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
.enable_mask = MAX77686_OPMODE_MASK, \
}
#define regulator_desc_buck1(num) { \
.name = "BUCK"#num, \
.id = MAX77686_BUCK##num, \
.ops = &max77686_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MAX77686_BUCK_MINUV, \
.uV_step = MAX77686_BUCK_UVSTEP, \
.ramp_delay = MAX77686_RAMP_DELAY, \
.n_voltages = MAX77686_VSEL_MASK + 1, \
.vsel_reg = MAX77686_REG_BUCK1OUT, \
.vsel_mask = MAX77686_VSEL_MASK, \
.enable_reg = MAX77686_REG_BUCK1CTRL, \
.enable_mask = MAX77686_OPMODE_MASK, \
}
#define regulator_desc_buck_dvs(num) { \
.name = "BUCK"#num, \
.id = MAX77686_BUCK##num, \
.ops = &max77686_buck_dvs_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MAX77686_DVS_MINUV, \
.uV_step = MAX77686_DVS_UVSTEP, \
.ramp_delay = MAX77686_DVS_RAMP_DELAY, \
.n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
.vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
.vsel_mask = MAX77686_DVS_VSEL_MASK, \
.enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
.enable_mask = MAX77686_OPMODE_MASK \
<< MAX77686_OPMODE_BUCK234_SHIFT, \
}
static struct regulator_desc regulators[] = {
regulator_desc_ldo_low(1),
regulator_desc_ldo_low(2),
regulator_desc_ldo(3),
regulator_desc_ldo(4),
regulator_desc_ldo(5),
regulator_desc_ldo_low(6),
regulator_desc_ldo_low(7),
regulator_desc_ldo_low(8),
regulator_desc_ldo(9),
regulator_desc_ldo(10),
regulator_desc_ldo(11),
regulator_desc_ldo(12),
regulator_desc_ldo(13),
regulator_desc_ldo(14),
regulator_desc_ldo_low(15),
regulator_desc_ldo(16),
regulator_desc_ldo(17),
regulator_desc_ldo(18),
regulator_desc_ldo(19),
regulator_desc_ldo(20),
regulator_desc_ldo(21),
regulator_desc_ldo(22),
regulator_desc_ldo(23),
regulator_desc_ldo(24),
regulator_desc_ldo(25),
regulator_desc_ldo(26),
regulator_desc_buck1(1),
regulator_desc_buck_dvs(2),
regulator_desc_buck_dvs(3),
regulator_desc_buck_dvs(4),
regulator_desc_buck(5),
regulator_desc_buck(6),
regulator_desc_buck(7),
regulator_desc_buck(8),
regulator_desc_buck(9),
};
#ifdef CONFIG_OF
static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,
struct max77686_platform_data *pdata)
{
struct device_node *pmic_np, *regulators_np;
struct max77686_regulator_data *rdata;
struct of_regulator_match rmatch;
unsigned int i;
pmic_np = iodev->dev->of_node;
regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators");
if (!regulators_np) {
dev_err(iodev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
pdata->num_regulators = ARRAY_SIZE(regulators);
rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
dev_err(iodev->dev,
"could not allocate memory for regulator data\n");
return -ENOMEM;
}
for (i = 0; i < pdata->num_regulators; i++) {
rmatch.name = regulators[i].name;
rmatch.init_data = NULL;
rmatch.of_node = NULL;
of_regulator_match(iodev->dev, regulators_np, &rmatch, 1);
rdata[i].initdata = rmatch.init_data;
}
pdata->regulators = rdata;
return 0;
}
#else
static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,
struct max77686_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
static __devinit int max77686_pmic_probe(struct platform_device *pdev)
{
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
struct regulator_dev **rdev;
struct max77686_data *max77686;
int i, size;
int ret = 0;
struct regulator_config config = { };
dev_dbg(&pdev->dev, "%s\n", __func__);
if (!pdata) {
dev_err(&pdev->dev, "no platform data found for regulator\n");
return -ENODEV;
}
if (iodev->dev->of_node) {
ret = max77686_pmic_dt_parse_pdata(iodev, pdata);
if (ret)
return ret;
}
if (pdata->num_regulators != MAX77686_REGULATORS) {
dev_err(&pdev->dev,
"Invalid initial data for regulator's initialiation\n");
return -EINVAL;
}
max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
GFP_KERNEL);
if (!max77686)
return -ENOMEM;
size = sizeof(struct regulator_dev *) * MAX77686_REGULATORS;
max77686->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!max77686->rdev)
return -ENOMEM;
rdev = max77686->rdev;
config.dev = &pdev->dev;
config.regmap = iodev->regmap;
platform_set_drvdata(pdev, max77686);
for (i = 0; i < MAX77686_REGULATORS; i++) {
config.init_data = pdata->regulators[i].initdata;
rdev[i] = regulator_register(®ulators[i], &config);
if (IS_ERR(rdev[i])) {
ret = PTR_ERR(rdev[i]);
dev_err(&pdev->dev,
"regulator init failed for %d\n", i);
rdev[i] = NULL;
goto err;
}
}
return 0;
err:
while (--i >= 0)
regulator_unregister(rdev[i]);
return ret;
}
static int __devexit max77686_pmic_remove(struct platform_device *pdev)
{
struct max77686_data *max77686 = platform_get_drvdata(pdev);
struct regulator_dev **rdev = max77686->rdev;
int i;
for (i = 0; i < MAX77686_REGULATORS; i++)
if (rdev[i])
regulator_unregister(rdev[i]);
return 0;
}
static const struct platform_device_id max77686_pmic_id[] = {
{"max77686-pmic", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
static struct platform_driver max77686_pmic_driver = {
.driver = {
.name = "max77686-pmic",
.owner = THIS_MODULE,
},
.probe = max77686_pmic_probe,
.remove = __devexit_p(max77686_pmic_remove),
.id_table = max77686_pmic_id,
};
static int __init max77686_pmic_init(void)
{
return platform_driver_register(&max77686_pmic_driver);
}
subsys_initcall(max77686_pmic_init);
static void __exit max77686_pmic_cleanup(void)
{
platform_driver_unregister(&max77686_pmic_driver);
}
module_exit(max77686_pmic_cleanup);
MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
MODULE_LICENSE("GPL");
|
