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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
4 *
5 * http://www.active-semi.com/products/power-management-units/act88xx/
6 *
7 * Copyright (C) 2013 Atmel Corporation
8 */
9
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/i2c.h>
13#include <linux/err.h>
14#include <linux/platform_device.h>
15#include <linux/regulator/driver.h>
16#include <linux/regulator/act8865.h>
17#include <linux/of.h>
18#include <linux/of_device.h>
19#include <linux/regulator/of_regulator.h>
20#include <linux/regmap.h>
21
22/*
23 * ACT8600 Global Register Map.
24 */
25#define ACT8600_SYS_MODE 0x00
26#define ACT8600_SYS_CTRL 0x01
27#define ACT8600_DCDC1_VSET 0x10
28#define ACT8600_DCDC1_CTRL 0x12
29#define ACT8600_DCDC2_VSET 0x20
30#define ACT8600_DCDC2_CTRL 0x22
31#define ACT8600_DCDC3_VSET 0x30
32#define ACT8600_DCDC3_CTRL 0x32
33#define ACT8600_SUDCDC4_VSET 0x40
34#define ACT8600_SUDCDC4_CTRL 0x41
35#define ACT8600_LDO5_VSET 0x50
36#define ACT8600_LDO5_CTRL 0x51
37#define ACT8600_LDO6_VSET 0x60
38#define ACT8600_LDO6_CTRL 0x61
39#define ACT8600_LDO7_VSET 0x70
40#define ACT8600_LDO7_CTRL 0x71
41#define ACT8600_LDO8_VSET 0x80
42#define ACT8600_LDO8_CTRL 0x81
43#define ACT8600_LDO910_CTRL 0x91
44#define ACT8600_APCH0 0xA1
45#define ACT8600_APCH1 0xA8
46#define ACT8600_APCH2 0xA9
47#define ACT8600_APCH_STAT 0xAA
48#define ACT8600_OTG0 0xB0
49#define ACT8600_OTG1 0xB2
50
51/*
52 * ACT8846 Global Register Map.
53 */
54#define ACT8846_SYS0 0x00
55#define ACT8846_SYS1 0x01
56#define ACT8846_REG1_VSET 0x10
57#define ACT8846_REG1_CTRL 0x12
58#define ACT8846_REG2_VSET0 0x20
59#define ACT8846_REG2_VSET1 0x21
60#define ACT8846_REG2_CTRL 0x22
61#define ACT8846_REG3_VSET0 0x30
62#define ACT8846_REG3_VSET1 0x31
63#define ACT8846_REG3_CTRL 0x32
64#define ACT8846_REG4_VSET0 0x40
65#define ACT8846_REG4_VSET1 0x41
66#define ACT8846_REG4_CTRL 0x42
67#define ACT8846_REG5_VSET 0x50
68#define ACT8846_REG5_CTRL 0x51
69#define ACT8846_REG6_VSET 0x58
70#define ACT8846_REG6_CTRL 0x59
71#define ACT8846_REG7_VSET 0x60
72#define ACT8846_REG7_CTRL 0x61
73#define ACT8846_REG8_VSET 0x68
74#define ACT8846_REG8_CTRL 0x69
75#define ACT8846_REG9_VSET 0x70
76#define ACT8846_REG9_CTRL 0x71
77#define ACT8846_REG10_VSET 0x80
78#define ACT8846_REG10_CTRL 0x81
79#define ACT8846_REG11_VSET 0x90
80#define ACT8846_REG11_CTRL 0x91
81#define ACT8846_REG12_VSET 0xa0
82#define ACT8846_REG12_CTRL 0xa1
83#define ACT8846_REG13_CTRL 0xb1
84#define ACT8846_GLB_OFF_CTRL 0xc3
85#define ACT8846_OFF_SYSMASK 0x18
86
87/*
88 * ACT8865 Global Register Map.
89 */
90#define ACT8865_SYS_MODE 0x00
91#define ACT8865_SYS_CTRL 0x01
92#define ACT8865_DCDC1_VSET1 0x20
93#define ACT8865_DCDC1_VSET2 0x21
94#define ACT8865_DCDC1_CTRL 0x22
95#define ACT8865_DCDC2_VSET1 0x30
96#define ACT8865_DCDC2_VSET2 0x31
97#define ACT8865_DCDC2_CTRL 0x32
98#define ACT8865_DCDC3_VSET1 0x40
99#define ACT8865_DCDC3_VSET2 0x41
100#define ACT8865_DCDC3_CTRL 0x42
101#define ACT8865_LDO1_VSET 0x50
102#define ACT8865_LDO1_CTRL 0x51
103#define ACT8865_LDO2_VSET 0x54
104#define ACT8865_LDO2_CTRL 0x55
105#define ACT8865_LDO3_VSET 0x60
106#define ACT8865_LDO3_CTRL 0x61
107#define ACT8865_LDO4_VSET 0x64
108#define ACT8865_LDO4_CTRL 0x65
109#define ACT8865_MSTROFF 0x20
110
111/*
112 * Field Definitions.
113 */
114#define ACT8865_ENA 0x80 /* ON - [7] */
115#define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */
116
117
118#define ACT8600_LDO10_ENA 0x40 /* ON - [6] */
119#define ACT8600_SUDCDC_VSEL_MASK 0xFF /* SUDCDC VSET - [7:0] */
120
121/*
122 * ACT8865 voltage number
123 */
124#define ACT8865_VOLTAGE_NUM 64
125#define ACT8600_SUDCDC_VOLTAGE_NUM 256
126
127struct act8865 {
128 struct regmap *regmap;
129 int off_reg;
130 int off_mask;
131};
132
133static const struct regmap_range act8600_reg_ranges[] = {
134 regmap_reg_range(0x00, 0x01),
135 regmap_reg_range(0x10, 0x10),
136 regmap_reg_range(0x12, 0x12),
137 regmap_reg_range(0x20, 0x20),
138 regmap_reg_range(0x22, 0x22),
139 regmap_reg_range(0x30, 0x30),
140 regmap_reg_range(0x32, 0x32),
141 regmap_reg_range(0x40, 0x41),
142 regmap_reg_range(0x50, 0x51),
143 regmap_reg_range(0x60, 0x61),
144 regmap_reg_range(0x70, 0x71),
145 regmap_reg_range(0x80, 0x81),
146 regmap_reg_range(0x91, 0x91),
147 regmap_reg_range(0xA1, 0xA1),
148 regmap_reg_range(0xA8, 0xAA),
149 regmap_reg_range(0xB0, 0xB0),
150 regmap_reg_range(0xB2, 0xB2),
151 regmap_reg_range(0xC1, 0xC1),
152};
153
154static const struct regmap_range act8600_reg_ro_ranges[] = {
155 regmap_reg_range(0xAA, 0xAA),
156 regmap_reg_range(0xC1, 0xC1),
157};
158
159static const struct regmap_range act8600_reg_volatile_ranges[] = {
160 regmap_reg_range(0x00, 0x01),
161 regmap_reg_range(0x12, 0x12),
162 regmap_reg_range(0x22, 0x22),
163 regmap_reg_range(0x32, 0x32),
164 regmap_reg_range(0x41, 0x41),
165 regmap_reg_range(0x51, 0x51),
166 regmap_reg_range(0x61, 0x61),
167 regmap_reg_range(0x71, 0x71),
168 regmap_reg_range(0x81, 0x81),
169 regmap_reg_range(0xA8, 0xA8),
170 regmap_reg_range(0xAA, 0xAA),
171 regmap_reg_range(0xB0, 0xB0),
172 regmap_reg_range(0xC1, 0xC1),
173};
174
175static const struct regmap_access_table act8600_write_ranges_table = {
176 .yes_ranges = act8600_reg_ranges,
177 .n_yes_ranges = ARRAY_SIZE(act8600_reg_ranges),
178 .no_ranges = act8600_reg_ro_ranges,
179 .n_no_ranges = ARRAY_SIZE(act8600_reg_ro_ranges),
180};
181
182static const struct regmap_access_table act8600_read_ranges_table = {
183 .yes_ranges = act8600_reg_ranges,
184 .n_yes_ranges = ARRAY_SIZE(act8600_reg_ranges),
185};
186
187static const struct regmap_access_table act8600_volatile_ranges_table = {
188 .yes_ranges = act8600_reg_volatile_ranges,
189 .n_yes_ranges = ARRAY_SIZE(act8600_reg_volatile_ranges),
190};
191
192static const struct regmap_config act8600_regmap_config = {
193 .reg_bits = 8,
194 .val_bits = 8,
195 .max_register = 0xFF,
196 .wr_table = &act8600_write_ranges_table,
197 .rd_table = &act8600_read_ranges_table,
198 .volatile_table = &act8600_volatile_ranges_table,
199};
200
201static const struct regmap_config act8865_regmap_config = {
202 .reg_bits = 8,
203 .val_bits = 8,
204};
205
206static const struct regulator_linear_range act8865_voltage_ranges[] = {
207 REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
208 REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
209 REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
210};
211
212static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
213 REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
214 REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
215 REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
216 REGULATOR_LINEAR_RANGE(19000000, 192, 247, 400000),
217 REGULATOR_LINEAR_RANGE(41400000, 248, 255, 0),
218};
219
220static const struct regulator_ops act8865_ops = {
221 .list_voltage = regulator_list_voltage_linear_range,
222 .map_voltage = regulator_map_voltage_linear_range,
223 .get_voltage_sel = regulator_get_voltage_sel_regmap,
224 .set_voltage_sel = regulator_set_voltage_sel_regmap,
225 .enable = regulator_enable_regmap,
226 .disable = regulator_disable_regmap,
227 .is_enabled = regulator_is_enabled_regmap,
228};
229
230static const struct regulator_ops act8865_ldo_ops = {
231 .enable = regulator_enable_regmap,
232 .disable = regulator_disable_regmap,
233 .is_enabled = regulator_is_enabled_regmap,
234};
235
236#define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply) \
237 [_family##_ID_##_id] = { \
238 .name = _name, \
239 .of_match = of_match_ptr(_name), \
240 .regulators_node = of_match_ptr("regulators"), \
241 .supply_name = _supply, \
242 .id = _family##_ID_##_id, \
243 .type = REGULATOR_VOLTAGE, \
244 .ops = &act8865_ops, \
245 .n_voltages = ACT8865_VOLTAGE_NUM, \
246 .linear_ranges = act8865_voltage_ranges, \
247 .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \
248 .vsel_reg = _family##_##_id##_##_vsel_reg, \
249 .vsel_mask = ACT8865_VSEL_MASK, \
250 .enable_reg = _family##_##_id##_CTRL, \
251 .enable_mask = ACT8865_ENA, \
252 .owner = THIS_MODULE, \
253 }
254
255static const struct regulator_desc act8600_regulators[] = {
256 ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"),
257 ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"),
258 ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"),
259 {
260 .name = "SUDCDC_REG4",
261 .of_match = of_match_ptr("SUDCDC_REG4"),
262 .regulators_node = of_match_ptr("regulators"),
263 .id = ACT8600_ID_SUDCDC4,
264 .ops = &act8865_ops,
265 .type = REGULATOR_VOLTAGE,
266 .n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM,
267 .linear_ranges = act8600_sudcdc_voltage_ranges,
268 .n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges),
269 .vsel_reg = ACT8600_SUDCDC4_VSET,
270 .vsel_mask = ACT8600_SUDCDC_VSEL_MASK,
271 .enable_reg = ACT8600_SUDCDC4_CTRL,
272 .enable_mask = ACT8865_ENA,
273 .owner = THIS_MODULE,
274 },
275 ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"),
276 ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"),
277 ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"),
278 ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"),
279 {
280 .name = "LDO_REG9",
281 .of_match = of_match_ptr("LDO_REG9"),
282 .regulators_node = of_match_ptr("regulators"),
283 .id = ACT8600_ID_LDO9,
284 .ops = &act8865_ldo_ops,
285 .type = REGULATOR_VOLTAGE,
286 .n_voltages = 1,
287 .fixed_uV = 3300000,
288 .enable_reg = ACT8600_LDO910_CTRL,
289 .enable_mask = ACT8865_ENA,
290 .owner = THIS_MODULE,
291 },
292 {
293 .name = "LDO_REG10",
294 .of_match = of_match_ptr("LDO_REG10"),
295 .regulators_node = of_match_ptr("regulators"),
296 .id = ACT8600_ID_LDO10,
297 .ops = &act8865_ldo_ops,
298 .type = REGULATOR_VOLTAGE,
299 .n_voltages = 1,
300 .fixed_uV = 1200000,
301 .enable_reg = ACT8600_LDO910_CTRL,
302 .enable_mask = ACT8600_LDO10_ENA,
303 .owner = THIS_MODULE,
304 },
305};
306
307static const struct regulator_desc act8846_regulators[] = {
308 ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"),
309 ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"),
310 ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"),
311 ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"),
312 ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"),
313 ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"),
314 ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"),
315 ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"),
316 ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"),
317 ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"),
318 ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"),
319 ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"),
320};
321
322static const struct regulator_desc act8865_regulators[] = {
323 ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"),
324 ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"),
325 ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"),
326 ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
327 ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
328 ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
329 ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
330};
331
332static const struct regulator_desc act8865_alt_regulators[] = {
333 ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET2, "vp1"),
334 ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET2, "vp2"),
335 ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET2, "vp3"),
336 ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
337 ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
338 ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
339 ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
340};
341
342#ifdef CONFIG_OF
343static const struct of_device_id act8865_dt_ids[] = {
344 { .compatible = "active-semi,act8600", .data = (void *)ACT8600 },
345 { .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
346 { .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
347 { }
348};
349MODULE_DEVICE_TABLE(of, act8865_dt_ids);
350#endif
351
352static struct act8865_regulator_data *act8865_get_regulator_data(
353 int id, struct act8865_platform_data *pdata)
354{
355 int i;
356
357 for (i = 0; i < pdata->num_regulators; i++) {
358 if (pdata->regulators[i].id == id)
359 return &pdata->regulators[i];
360 }
361
362 return NULL;
363}
364
365static struct i2c_client *act8865_i2c_client;
366static void act8865_power_off(void)
367{
368 struct act8865 *act8865;
369
370 act8865 = i2c_get_clientdata(act8865_i2c_client);
371 regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
372 while (1);
373}
374
375static int act8865_pmic_probe(struct i2c_client *client,
376 const struct i2c_device_id *i2c_id)
377{
378 const struct regulator_desc *regulators;
379 struct act8865_platform_data *pdata = NULL;
380 struct device *dev = &client->dev;
381 int i, ret, num_regulators;
382 struct act8865 *act8865;
383 const struct regmap_config *regmap_config;
384 unsigned long type;
385 int off_reg, off_mask;
386 int voltage_select = 0;
387
388 if (dev->of_node) {
389 const struct of_device_id *id;
390
391 id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
392 if (!id)
393 return -ENODEV;
394
395 type = (unsigned long) id->data;
396
397 voltage_select = !!of_get_property(dev->of_node,
398 "active-semi,vsel-high",
399 NULL);
400 } else {
401 type = i2c_id->driver_data;
402 pdata = dev_get_platdata(dev);
403 }
404
405 switch (type) {
406 case ACT8600:
407 regulators = act8600_regulators;
408 num_regulators = ARRAY_SIZE(act8600_regulators);
409 regmap_config = &act8600_regmap_config;
410 off_reg = -1;
411 off_mask = -1;
412 break;
413 case ACT8846:
414 regulators = act8846_regulators;
415 num_regulators = ARRAY_SIZE(act8846_regulators);
416 regmap_config = &act8865_regmap_config;
417 off_reg = ACT8846_GLB_OFF_CTRL;
418 off_mask = ACT8846_OFF_SYSMASK;
419 break;
420 case ACT8865:
421 if (voltage_select) {
422 regulators = act8865_alt_regulators;
423 num_regulators = ARRAY_SIZE(act8865_alt_regulators);
424 } else {
425 regulators = act8865_regulators;
426 num_regulators = ARRAY_SIZE(act8865_regulators);
427 }
428 regmap_config = &act8865_regmap_config;
429 off_reg = ACT8865_SYS_CTRL;
430 off_mask = ACT8865_MSTROFF;
431 break;
432 default:
433 dev_err(dev, "invalid device id %lu\n", type);
434 return -EINVAL;
435 }
436
437 act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
438 if (!act8865)
439 return -ENOMEM;
440
441 act8865->regmap = devm_regmap_init_i2c(client, regmap_config);
442 if (IS_ERR(act8865->regmap)) {
443 ret = PTR_ERR(act8865->regmap);
444 dev_err(dev, "Failed to allocate register map: %d\n", ret);
445 return ret;
446 }
447
448 if (of_device_is_system_power_controller(dev->of_node)) {
449 if (!pm_power_off && (off_reg > 0)) {
450 act8865_i2c_client = client;
451 act8865->off_reg = off_reg;
452 act8865->off_mask = off_mask;
453 pm_power_off = act8865_power_off;
454 } else {
455 dev_err(dev, "Failed to set poweroff capability, already defined\n");
456 }
457 }
458
459 /* Finally register devices */
460 for (i = 0; i < num_regulators; i++) {
461 const struct regulator_desc *desc = ®ulators[i];
462 struct regulator_config config = { };
463 struct regulator_dev *rdev;
464
465 config.dev = dev;
466 config.driver_data = act8865;
467 config.regmap = act8865->regmap;
468
469 if (pdata) {
470 struct act8865_regulator_data *rdata;
471
472 rdata = act8865_get_regulator_data(desc->id, pdata);
473 if (rdata) {
474 config.init_data = rdata->init_data;
475 config.of_node = rdata->of_node;
476 }
477 }
478
479 rdev = devm_regulator_register(dev, desc, &config);
480 if (IS_ERR(rdev)) {
481 dev_err(dev, "failed to register %s\n", desc->name);
482 return PTR_ERR(rdev);
483 }
484 }
485
486 i2c_set_clientdata(client, act8865);
487
488 return 0;
489}
490
491static const struct i2c_device_id act8865_ids[] = {
492 { .name = "act8600", .driver_data = ACT8600 },
493 { .name = "act8846", .driver_data = ACT8846 },
494 { .name = "act8865", .driver_data = ACT8865 },
495 { },
496};
497MODULE_DEVICE_TABLE(i2c, act8865_ids);
498
499static struct i2c_driver act8865_pmic_driver = {
500 .driver = {
501 .name = "act8865",
502 },
503 .probe = act8865_pmic_probe,
504 .id_table = act8865_ids,
505};
506
507module_i2c_driver(act8865_pmic_driver);
508
509MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
510MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
511MODULE_LICENSE("GPL v2");