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
|
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 BayLibre SAS
// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
//
// Regulator driver for MAXIM 77650/77651 charger/power-supply.
#include <linux/of.h>
#include <linux/mfd/max77650.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#define MAX77650_REGULATOR_EN_CTRL_MASK GENMASK(3, 0)
#define MAX77650_REGULATOR_EN_CTRL_BITS(_reg) \
((_reg) & MAX77650_REGULATOR_EN_CTRL_MASK)
#define MAX77650_REGULATOR_ENABLED GENMASK(2, 1)
#define MAX77650_REGULATOR_DISABLED BIT(2)
#define MAX77650_REGULATOR_V_LDO_MASK GENMASK(6, 0)
#define MAX77650_REGULATOR_V_SBB_MASK GENMASK(5, 0)
#define MAX77651_REGULATOR_V_SBB1_MASK GENMASK(5, 2)
#define MAX77651_REGULATOR_V_SBB1_RANGE_MASK GENMASK(1, 0)
#define MAX77650_REGULATOR_AD_MASK BIT(3)
#define MAX77650_REGULATOR_AD_DISABLED 0x00
#define MAX77650_REGULATOR_AD_ENABLED BIT(3)
#define MAX77650_REGULATOR_CURR_LIM_MASK GENMASK(7, 6)
enum {
MAX77650_REGULATOR_ID_LDO = 0,
MAX77650_REGULATOR_ID_SBB0,
MAX77650_REGULATOR_ID_SBB1,
MAX77650_REGULATOR_ID_SBB2,
MAX77650_REGULATOR_NUM_REGULATORS,
};
struct max77650_regulator_desc {
struct regulator_desc desc;
unsigned int regA;
unsigned int regB;
};
static struct max77650_regulator_desc max77651_SBB1_desc;
static const unsigned int max77651_sbb1_volt_range_sel[] = {
0x0, 0x1, 0x2, 0x3
};
static const struct linear_range max77651_sbb1_volt_ranges[] = {
/* range index 0 */
REGULATOR_LINEAR_RANGE(2400000, 0x00, 0x0f, 50000),
/* range index 1 */
REGULATOR_LINEAR_RANGE(3200000, 0x00, 0x0f, 50000),
/* range index 2 */
REGULATOR_LINEAR_RANGE(4000000, 0x00, 0x0f, 50000),
/* range index 3 */
REGULATOR_LINEAR_RANGE(4800000, 0x00, 0x09, 50000),
};
static const unsigned int max77650_current_limit_table[] = {
1000000, 866000, 707000, 500000,
};
static int max77650_regulator_is_enabled(struct regulator_dev *rdev)
{
struct max77650_regulator_desc *rdesc;
struct regmap *map;
int val, rv, en;
rdesc = rdev_get_drvdata(rdev);
map = rdev_get_regmap(rdev);
rv = regmap_read(map, rdesc->regB, &val);
if (rv)
return rv;
en = MAX77650_REGULATOR_EN_CTRL_BITS(val);
return en != MAX77650_REGULATOR_DISABLED;
}
static int max77650_regulator_enable(struct regulator_dev *rdev)
{
struct max77650_regulator_desc *rdesc;
struct regmap *map;
rdesc = rdev_get_drvdata(rdev);
map = rdev_get_regmap(rdev);
return regmap_update_bits(map, rdesc->regB,
MAX77650_REGULATOR_EN_CTRL_MASK,
MAX77650_REGULATOR_ENABLED);
}
static int max77650_regulator_disable(struct regulator_dev *rdev)
{
struct max77650_regulator_desc *rdesc;
struct regmap *map;
rdesc = rdev_get_drvdata(rdev);
map = rdev_get_regmap(rdev);
return regmap_update_bits(map, rdesc->regB,
MAX77650_REGULATOR_EN_CTRL_MASK,
MAX77650_REGULATOR_DISABLED);
}
static const struct regulator_ops max77650_regulator_LDO_ops = {
.is_enabled = max77650_regulator_is_enabled,
.enable = max77650_regulator_enable,
.disable = max77650_regulator_disable,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
static const struct regulator_ops max77650_regulator_SBB_ops = {
.is_enabled = max77650_regulator_is_enabled,
.enable = max77650_regulator_enable,
.disable = max77650_regulator_disable,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
/* Special case for max77651 SBB1 - pickable linear-range voltage mapping. */
static const struct regulator_ops max77651_SBB1_regulator_ops = {
.is_enabled = max77650_regulator_is_enabled,
.enable = max77650_regulator_enable,
.disable = max77650_regulator_disable,
.list_voltage = regulator_list_voltage_pickable_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
.set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
static struct max77650_regulator_desc max77650_LDO_desc = {
.desc = {
.name = "ldo",
.of_match = of_match_ptr("ldo"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-ldo",
.id = MAX77650_REGULATOR_ID_LDO,
.ops = &max77650_regulator_LDO_ops,
.min_uV = 1350000,
.uV_step = 12500,
.n_voltages = 128,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_LDO_MASK,
.vsel_reg = MAX77650_REG_CNFG_LDO_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_LDO_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
},
.regA = MAX77650_REG_CNFG_LDO_A,
.regB = MAX77650_REG_CNFG_LDO_B,
};
static struct max77650_regulator_desc max77650_SBB0_desc = {
.desc = {
.name = "sbb0",
.of_match = of_match_ptr("sbb0"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb0",
.id = MAX77650_REGULATOR_ID_SBB0,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 800000,
.uV_step = 25000,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB0_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB0_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB0_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB0_A,
.regB = MAX77650_REG_CNFG_SBB0_B,
};
static struct max77650_regulator_desc max77650_SBB1_desc = {
.desc = {
.name = "sbb1",
.of_match = of_match_ptr("sbb1"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb1",
.id = MAX77650_REGULATOR_ID_SBB1,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 800000,
.uV_step = 12500,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB1_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB1_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB1_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB1_A,
.regB = MAX77650_REG_CNFG_SBB1_B,
};
static struct max77650_regulator_desc max77651_SBB1_desc = {
.desc = {
.name = "sbb1",
.of_match = of_match_ptr("sbb1"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb1",
.id = MAX77650_REGULATOR_ID_SBB1,
.ops = &max77651_SBB1_regulator_ops,
.linear_range_selectors_bitfield = max77651_sbb1_volt_range_sel,
.linear_ranges = max77651_sbb1_volt_ranges,
.n_linear_ranges = ARRAY_SIZE(max77651_sbb1_volt_ranges),
.n_voltages = 58,
.vsel_step = 1,
.vsel_range_mask = MAX77651_REGULATOR_V_SBB1_RANGE_MASK,
.vsel_range_reg = MAX77650_REG_CNFG_SBB1_A,
.vsel_mask = MAX77651_REGULATOR_V_SBB1_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB1_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB1_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB1_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB1_A,
.regB = MAX77650_REG_CNFG_SBB1_B,
};
static struct max77650_regulator_desc max77650_SBB2_desc = {
.desc = {
.name = "sbb2",
.of_match = of_match_ptr("sbb2"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb0",
.id = MAX77650_REGULATOR_ID_SBB2,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 800000,
.uV_step = 50000,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB2_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB2_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB2_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB2_A,
.regB = MAX77650_REG_CNFG_SBB2_B,
};
static struct max77650_regulator_desc max77651_SBB2_desc = {
.desc = {
.name = "sbb2",
.of_match = of_match_ptr("sbb2"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb0",
.id = MAX77650_REGULATOR_ID_SBB2,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 2400000,
.uV_step = 50000,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB2_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB2_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB2_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB2_A,
.regB = MAX77650_REG_CNFG_SBB2_B,
};
static int max77650_regulator_probe(struct platform_device *pdev)
{
struct max77650_regulator_desc **rdescs;
struct max77650_regulator_desc *rdesc;
struct regulator_config config = { };
struct device *dev, *parent;
struct regulator_dev *rdev;
struct regmap *map;
unsigned int val;
int i, rv;
dev = &pdev->dev;
parent = dev->parent;
if (!dev->of_node)
dev->of_node = parent->of_node;
rdescs = devm_kcalloc(dev, MAX77650_REGULATOR_NUM_REGULATORS,
sizeof(*rdescs), GFP_KERNEL);
if (!rdescs)
return -ENOMEM;
map = dev_get_regmap(parent, NULL);
if (!map)
return -ENODEV;
rv = regmap_read(map, MAX77650_REG_CID, &val);
if (rv)
return rv;
rdescs[MAX77650_REGULATOR_ID_LDO] = &max77650_LDO_desc;
rdescs[MAX77650_REGULATOR_ID_SBB0] = &max77650_SBB0_desc;
switch (MAX77650_CID_BITS(val)) {
case MAX77650_CID_77650A:
case MAX77650_CID_77650C:
rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77650_SBB1_desc;
rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77650_SBB2_desc;
break;
case MAX77650_CID_77651A:
case MAX77650_CID_77651B:
rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77651_SBB1_desc;
rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77651_SBB2_desc;
break;
default:
return -ENODEV;
}
config.dev = parent;
for (i = 0; i < MAX77650_REGULATOR_NUM_REGULATORS; i++) {
rdesc = rdescs[i];
config.driver_data = rdesc;
rdev = devm_regulator_register(dev, &rdesc->desc, &config);
if (IS_ERR(rdev))
return PTR_ERR(rdev);
}
return 0;
}
static const struct of_device_id max77650_regulator_of_match[] = {
{ .compatible = "maxim,max77650-regulator" },
{ }
};
MODULE_DEVICE_TABLE(of, max77650_regulator_of_match);
static struct platform_driver max77650_regulator_driver = {
.driver = {
.name = "max77650-regulator",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = max77650_regulator_of_match,
},
.probe = max77650_regulator_probe,
};
module_platform_driver(max77650_regulator_driver);
MODULE_DESCRIPTION("MAXIM 77650/77651 regulator driver");
MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:max77650-regulator");
|
