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
|
// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (c) 2013 Samsung Electronics Co., Ltd
// http://www.samsung.com
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.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/samsung/core.h>
#include <linux/mfd/samsung/s2mpa01.h>
#define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators)
struct s2mpa01_info {
struct of_regulator_match rdata[S2MPA01_REGULATOR_MAX];
int ramp_delay24;
int ramp_delay3;
int ramp_delay5;
int ramp_delay16;
int ramp_delay7;
int ramp_delay8910;
};
static int get_ramp_delay(int ramp_delay)
{
unsigned char cnt = 0;
ramp_delay /= 6250;
while (true) {
ramp_delay = ramp_delay >> 1;
if (ramp_delay == 0)
break;
cnt++;
}
if (cnt > 3)
cnt = 3;
return cnt;
}
static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector)
{
struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
unsigned int ramp_delay = 0;
int old_volt, new_volt;
switch (rdev_get_id(rdev)) {
case S2MPA01_BUCK2:
case S2MPA01_BUCK4:
ramp_delay = s2mpa01->ramp_delay24;
break;
case S2MPA01_BUCK3:
ramp_delay = s2mpa01->ramp_delay3;
break;
case S2MPA01_BUCK5:
ramp_delay = s2mpa01->ramp_delay5;
break;
case S2MPA01_BUCK1:
case S2MPA01_BUCK6:
ramp_delay = s2mpa01->ramp_delay16;
break;
case S2MPA01_BUCK7:
ramp_delay = s2mpa01->ramp_delay7;
break;
case S2MPA01_BUCK8:
case S2MPA01_BUCK9:
case S2MPA01_BUCK10:
ramp_delay = s2mpa01->ramp_delay8910;
break;
}
if (ramp_delay == 0)
ramp_delay = rdev->desc->ramp_delay;
old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
}
static int s2mpa01_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
struct s2mpa01_info *s2mpa01 = rdev_get_drvdata(rdev);
unsigned int ramp_val, ramp_shift, ramp_reg = S2MPA01_REG_RAMP2;
unsigned int ramp_enable = 1, enable_shift = 0;
int ret;
switch (rdev_get_id(rdev)) {
case S2MPA01_BUCK1:
enable_shift = S2MPA01_BUCK1_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
if (ramp_delay > s2mpa01->ramp_delay16)
s2mpa01->ramp_delay16 = ramp_delay;
else
ramp_delay = s2mpa01->ramp_delay16;
ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
break;
case S2MPA01_BUCK2:
enable_shift = S2MPA01_BUCK2_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
if (ramp_delay > s2mpa01->ramp_delay24)
s2mpa01->ramp_delay24 = ramp_delay;
else
ramp_delay = s2mpa01->ramp_delay24;
ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
ramp_reg = S2MPA01_REG_RAMP1;
break;
case S2MPA01_BUCK3:
enable_shift = S2MPA01_BUCK3_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
s2mpa01->ramp_delay3 = ramp_delay;
ramp_shift = S2MPA01_BUCK3_RAMP_SHIFT;
ramp_reg = S2MPA01_REG_RAMP1;
break;
case S2MPA01_BUCK4:
enable_shift = S2MPA01_BUCK4_RAMP_EN_SHIFT;
if (!ramp_delay) {
ramp_enable = 0;
break;
}
if (ramp_delay > s2mpa01->ramp_delay24)
s2mpa01->ramp_delay24 = ramp_delay;
else
ramp_delay = s2mpa01->ramp_delay24;
ramp_shift = S2MPA01_BUCK24_RAMP_SHIFT;
ramp_reg = S2MPA01_REG_RAMP1;
break;
case S2MPA01_BUCK5:
s2mpa01->ramp_delay5 = ramp_delay;
ramp_shift = S2MPA01_BUCK5_RAMP_SHIFT;
break;
case S2MPA01_BUCK6:
if (ramp_delay > s2mpa01->ramp_delay16)
s2mpa01->ramp_delay16 = ramp_delay;
else
ramp_delay = s2mpa01->ramp_delay16;
ramp_shift = S2MPA01_BUCK16_RAMP_SHIFT;
break;
case S2MPA01_BUCK7:
s2mpa01->ramp_delay7 = ramp_delay;
ramp_shift = S2MPA01_BUCK7_RAMP_SHIFT;
break;
case S2MPA01_BUCK8:
case S2MPA01_BUCK9:
case S2MPA01_BUCK10:
if (ramp_delay > s2mpa01->ramp_delay8910)
s2mpa01->ramp_delay8910 = ramp_delay;
else
ramp_delay = s2mpa01->ramp_delay8910;
ramp_shift = S2MPA01_BUCK8910_RAMP_SHIFT;
break;
default:
return 0;
}
if (!ramp_enable)
goto ramp_disable;
/* Ramp delay can be enabled/disabled only for buck[1234] */
if (rdev_get_id(rdev) >= S2MPA01_BUCK1 &&
rdev_get_id(rdev) <= S2MPA01_BUCK4) {
ret = regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
1 << enable_shift, 1 << enable_shift);
if (ret) {
dev_err(&rdev->dev, "failed to enable ramp rate\n");
return ret;
}
}
ramp_val = get_ramp_delay(ramp_delay);
return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
ramp_val << ramp_shift);
ramp_disable:
return regmap_update_bits(rdev->regmap, S2MPA01_REG_RAMP1,
1 << enable_shift, 0);
}
static const struct regulator_ops s2mpa01_ldo_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 const struct regulator_ops s2mpa01_buck_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 = s2mpa01_regulator_set_voltage_time_sel,
.set_ramp_delay = s2mpa01_set_ramp_delay,
};
#define regulator_desc_ldo(num, step) { \
.name = "LDO"#num, \
.id = S2MPA01_LDO##num, \
.ops = &s2mpa01_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MIN_800_MV, \
.uV_step = step, \
.n_voltages = S2MPA01_LDO_N_VOLTAGES, \
.vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
.vsel_mask = S2MPA01_LDO_VSEL_MASK, \
.enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
.enable_mask = S2MPA01_ENABLE_MASK \
}
#define regulator_desc_buck1_4(num) { \
.name = "BUCK"#num, \
.id = S2MPA01_BUCK##num, \
.ops = &s2mpa01_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MIN_600_MV, \
.uV_step = STEP_6_25_MV, \
.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPA01_RAMP_DELAY, \
.vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
.enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
.enable_mask = S2MPA01_ENABLE_MASK \
}
#define regulator_desc_buck5 { \
.name = "BUCK5", \
.id = S2MPA01_BUCK5, \
.ops = &s2mpa01_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = MIN_800_MV, \
.uV_step = STEP_6_25_MV, \
.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPA01_RAMP_DELAY, \
.vsel_reg = S2MPA01_REG_B5CTRL2, \
.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
.enable_reg = S2MPA01_REG_B5CTRL1, \
.enable_mask = S2MPA01_ENABLE_MASK \
}
#define regulator_desc_buck6_10(num, min, step) { \
.name = "BUCK"#num, \
.id = S2MPA01_BUCK##num, \
.ops = &s2mpa01_buck_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = min, \
.uV_step = step, \
.n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
.ramp_delay = S2MPA01_RAMP_DELAY, \
.vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
.vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
.enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
.enable_mask = S2MPA01_ENABLE_MASK \
}
static const struct regulator_desc regulators[] = {
regulator_desc_ldo(1, STEP_25_MV),
regulator_desc_ldo(2, STEP_50_MV),
regulator_desc_ldo(3, STEP_50_MV),
regulator_desc_ldo(4, STEP_50_MV),
regulator_desc_ldo(5, STEP_50_MV),
regulator_desc_ldo(6, STEP_25_MV),
regulator_desc_ldo(7, STEP_50_MV),
regulator_desc_ldo(8, STEP_50_MV),
regulator_desc_ldo(9, STEP_50_MV),
regulator_desc_ldo(10, STEP_50_MV),
regulator_desc_ldo(11, STEP_25_MV),
regulator_desc_ldo(12, STEP_50_MV),
regulator_desc_ldo(13, STEP_50_MV),
regulator_desc_ldo(14, STEP_50_MV),
regulator_desc_ldo(15, STEP_50_MV),
regulator_desc_ldo(16, STEP_50_MV),
regulator_desc_ldo(17, STEP_50_MV),
regulator_desc_ldo(18, STEP_50_MV),
regulator_desc_ldo(19, STEP_50_MV),
regulator_desc_ldo(20, STEP_50_MV),
regulator_desc_ldo(21, STEP_50_MV),
regulator_desc_ldo(22, STEP_25_MV),
regulator_desc_ldo(23, STEP_25_MV),
regulator_desc_ldo(24, STEP_50_MV),
regulator_desc_ldo(25, STEP_50_MV),
regulator_desc_ldo(26, STEP_50_MV),
regulator_desc_buck1_4(1),
regulator_desc_buck1_4(2),
regulator_desc_buck1_4(3),
regulator_desc_buck1_4(4),
regulator_desc_buck5,
regulator_desc_buck6_10(6, MIN_600_MV, STEP_6_25_MV),
regulator_desc_buck6_10(7, MIN_600_MV, STEP_6_25_MV),
regulator_desc_buck6_10(8, MIN_800_MV, STEP_12_5_MV),
regulator_desc_buck6_10(9, MIN_1500_MV, STEP_12_5_MV),
regulator_desc_buck6_10(10, MIN_1000_MV, STEP_12_5_MV),
};
static int s2mpa01_pmic_probe(struct platform_device *pdev)
{
struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
struct device_node *reg_np = NULL;
struct regulator_config config = { };
struct of_regulator_match *rdata;
struct s2mpa01_info *s2mpa01;
int i;
s2mpa01 = devm_kzalloc(&pdev->dev, sizeof(*s2mpa01), GFP_KERNEL);
if (!s2mpa01)
return -ENOMEM;
rdata = s2mpa01->rdata;
for (i = 0; i < S2MPA01_REGULATOR_CNT; i++)
rdata[i].name = regulators[i].name;
if (iodev->dev->of_node) {
reg_np = of_get_child_by_name(iodev->dev->of_node,
"regulators");
if (!reg_np) {
dev_err(&pdev->dev,
"could not find regulators sub-node\n");
return -EINVAL;
}
of_regulator_match(&pdev->dev, reg_np, rdata,
S2MPA01_REGULATOR_MAX);
of_node_put(reg_np);
}
platform_set_drvdata(pdev, s2mpa01);
config.dev = &pdev->dev;
config.regmap = iodev->regmap_pmic;
config.driver_data = s2mpa01;
for (i = 0; i < S2MPA01_REGULATOR_MAX; i++) {
struct regulator_dev *rdev;
if (pdata)
config.init_data = pdata->regulators[i].initdata;
else
config.init_data = rdata[i].init_data;
if (reg_np)
config.of_node = rdata[i].of_node;
rdev = devm_regulator_register(&pdev->dev,
®ulators[i], &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "regulator init failed for %d\n",
i);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct platform_device_id s2mpa01_pmic_id[] = {
{ "s2mpa01-pmic", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, s2mpa01_pmic_id);
static struct platform_driver s2mpa01_pmic_driver = {
.driver = {
.name = "s2mpa01-pmic",
},
.probe = s2mpa01_pmic_probe,
.id_table = s2mpa01_pmic_id,
};
module_platform_driver(s2mpa01_pmic_driver);
/* Module information */
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
MODULE_LICENSE("GPL");
|
