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16#include <linux/err.h>
17#include <linux/i2c.h>
18#include <linux/module.h>
19#include <linux/of.h>
20#include <linux/init.h>
21#include <linux/slab.h>
22#include <linux/regulator/driver.h>
23#include <linux/regulator/machine.h>
24#include <linux/regmap.h>
25#include <linux/irq.h>
26#include <linux/interrupt.h>
27#include <linux/regulator/of_regulator.h>
28#include "pv88080-regulator.h"
29
30#define PV88080_MAX_REGULATORS 4
31
32
33enum {
34
35 PV88080_ID_BUCK1,
36 PV88080_ID_BUCK2,
37 PV88080_ID_BUCK3,
38 PV88080_ID_HVBUCK,
39};
40
41enum pv88080_types {
42 TYPE_PV88080_AA,
43 TYPE_PV88080_BA,
44};
45
46struct pv88080_regulator {
47 struct regulator_desc desc;
48
49 unsigned int n_current_limits;
50 const int *current_limits;
51 unsigned int limit_mask;
52 unsigned int mode_reg;
53 unsigned int limit_reg;
54 unsigned int conf2;
55 unsigned int conf5;
56};
57
58struct pv88080 {
59 struct device *dev;
60 struct regmap *regmap;
61 struct regulator_dev *rdev[PV88080_MAX_REGULATORS];
62 unsigned long type;
63 const struct pv88080_compatible_regmap *regmap_config;
64};
65
66struct pv88080_buck_voltage {
67 int min_uV;
68 int max_uV;
69 int uV_step;
70};
71
72struct pv88080_buck_regmap {
73
74 int buck_enable_reg;
75 int buck_vsel_reg;
76 int buck_mode_reg;
77 int buck_limit_reg;
78 int buck_vdac_range_reg;
79 int buck_vrange_gain_reg;
80
81 int buck_enable_mask;
82 int buck_vsel_mask;
83 int buck_limit_mask;
84};
85
86struct pv88080_compatible_regmap {
87
88 struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1];
89
90 int hvbuck_enable_reg;
91 int hvbuck_vsel_reg;
92 int hvbuck_enable_mask;
93 int hvbuck_vsel_mask;
94};
95
96static const struct regmap_config pv88080_regmap_config = {
97 .reg_bits = 8,
98 .val_bits = 8,
99};
100
101
102
103
104
105static const int pv88080_buck1_limits[] = {
106 3230000, 5130000, 6960000, 8790000
107};
108
109static const int pv88080_buck23_limits[] = {
110 1496000, 2393000, 3291000, 4189000
111};
112
113static const struct pv88080_buck_voltage pv88080_buck_vol[2] = {
114 {
115 .min_uV = 600000,
116 .max_uV = 1393750,
117 .uV_step = 6250,
118 },
119 {
120 .min_uV = 1400000,
121 .max_uV = 2193750,
122 .uV_step = 6250,
123 },
124};
125
126static const struct pv88080_compatible_regmap pv88080_aa_regs = {
127
128 .buck_regmap[0] = {
129 .buck_enable_reg = PV88080AA_REG_BUCK1_CONF0,
130 .buck_vsel_reg = PV88080AA_REG_BUCK1_CONF0,
131 .buck_mode_reg = PV88080AA_REG_BUCK1_CONF1,
132 .buck_limit_reg = PV88080AA_REG_BUCK1_CONF1,
133 .buck_vdac_range_reg = PV88080AA_REG_BUCK1_CONF2,
134 .buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5,
135 .buck_enable_mask = PV88080_BUCK1_EN,
136 .buck_vsel_mask = PV88080_VBUCK1_MASK,
137 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
138 },
139
140 .buck_regmap[1] = {
141 .buck_enable_reg = PV88080AA_REG_BUCK2_CONF0,
142 .buck_vsel_reg = PV88080AA_REG_BUCK2_CONF0,
143 .buck_mode_reg = PV88080AA_REG_BUCK2_CONF1,
144 .buck_limit_reg = PV88080AA_REG_BUCK2_CONF1,
145 .buck_vdac_range_reg = PV88080AA_REG_BUCK2_CONF2,
146 .buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5,
147 .buck_enable_mask = PV88080_BUCK2_EN,
148 .buck_vsel_mask = PV88080_VBUCK2_MASK,
149 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
150 },
151
152 .buck_regmap[2] = {
153 .buck_enable_reg = PV88080AA_REG_BUCK3_CONF0,
154 .buck_vsel_reg = PV88080AA_REG_BUCK3_CONF0,
155 .buck_mode_reg = PV88080AA_REG_BUCK3_CONF1,
156 .buck_limit_reg = PV88080AA_REG_BUCK3_CONF1,
157 .buck_vdac_range_reg = PV88080AA_REG_BUCK3_CONF2,
158 .buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5,
159 .buck_enable_mask = PV88080_BUCK3_EN,
160 .buck_vsel_mask = PV88080_VBUCK3_MASK,
161 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
162 },
163
164 .hvbuck_enable_reg = PV88080AA_REG_HVBUCK_CONF2,
165 .hvbuck_vsel_reg = PV88080AA_REG_HVBUCK_CONF1,
166 .hvbuck_enable_mask = PV88080_HVBUCK_EN,
167 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
168};
169
170static const struct pv88080_compatible_regmap pv88080_ba_regs = {
171
172 .buck_regmap[0] = {
173 .buck_enable_reg = PV88080BA_REG_BUCK1_CONF0,
174 .buck_vsel_reg = PV88080BA_REG_BUCK1_CONF0,
175 .buck_mode_reg = PV88080BA_REG_BUCK1_CONF1,
176 .buck_limit_reg = PV88080BA_REG_BUCK1_CONF1,
177 .buck_vdac_range_reg = PV88080BA_REG_BUCK1_CONF2,
178 .buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5,
179 .buck_enable_mask = PV88080_BUCK1_EN,
180 .buck_vsel_mask = PV88080_VBUCK1_MASK,
181 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
182 },
183
184 .buck_regmap[1] = {
185 .buck_enable_reg = PV88080BA_REG_BUCK2_CONF0,
186 .buck_vsel_reg = PV88080BA_REG_BUCK2_CONF0,
187 .buck_mode_reg = PV88080BA_REG_BUCK2_CONF1,
188 .buck_limit_reg = PV88080BA_REG_BUCK2_CONF1,
189 .buck_vdac_range_reg = PV88080BA_REG_BUCK2_CONF2,
190 .buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5,
191 .buck_enable_mask = PV88080_BUCK2_EN,
192 .buck_vsel_mask = PV88080_VBUCK2_MASK,
193 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
194 },
195
196 .buck_regmap[2] = {
197 .buck_enable_reg = PV88080BA_REG_BUCK3_CONF0,
198 .buck_vsel_reg = PV88080BA_REG_BUCK3_CONF0,
199 .buck_mode_reg = PV88080BA_REG_BUCK3_CONF1,
200 .buck_limit_reg = PV88080BA_REG_BUCK3_CONF1,
201 .buck_vdac_range_reg = PV88080BA_REG_BUCK3_CONF2,
202 .buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5,
203 .buck_enable_mask = PV88080_BUCK3_EN,
204 .buck_vsel_mask = PV88080_VBUCK3_MASK,
205 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
206 },
207
208 .hvbuck_enable_reg = PV88080BA_REG_HVBUCK_CONF2,
209 .hvbuck_vsel_reg = PV88080BA_REG_HVBUCK_CONF1,
210 .hvbuck_enable_mask = PV88080_HVBUCK_EN,
211 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
212};
213
214#ifdef CONFIG_OF
215static const struct of_device_id pv88080_dt_ids[] = {
216 { .compatible = "pvs,pv88080", .data = (void *)TYPE_PV88080_AA },
217 { .compatible = "pvs,pv88080-aa", .data = (void *)TYPE_PV88080_AA },
218 { .compatible = "pvs,pv88080-ba", .data = (void *)TYPE_PV88080_BA },
219 {},
220};
221MODULE_DEVICE_TABLE(of, pv88080_dt_ids);
222#endif
223
224static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev)
225{
226 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
227 unsigned int data;
228 int ret, mode = 0;
229
230 ret = regmap_read(rdev->regmap, info->mode_reg, &data);
231 if (ret < 0)
232 return ret;
233
234 switch (data & PV88080_BUCK1_MODE_MASK) {
235 case PV88080_BUCK_MODE_SYNC:
236 mode = REGULATOR_MODE_FAST;
237 break;
238 case PV88080_BUCK_MODE_AUTO:
239 mode = REGULATOR_MODE_NORMAL;
240 break;
241 case PV88080_BUCK_MODE_SLEEP:
242 mode = REGULATOR_MODE_STANDBY;
243 break;
244 default:
245 return -EINVAL;
246 }
247
248 return mode;
249}
250
251static int pv88080_buck_set_mode(struct regulator_dev *rdev,
252 unsigned int mode)
253{
254 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
255 int val = 0;
256
257 switch (mode) {
258 case REGULATOR_MODE_FAST:
259 val = PV88080_BUCK_MODE_SYNC;
260 break;
261 case REGULATOR_MODE_NORMAL:
262 val = PV88080_BUCK_MODE_AUTO;
263 break;
264 case REGULATOR_MODE_STANDBY:
265 val = PV88080_BUCK_MODE_SLEEP;
266 break;
267 default:
268 return -EINVAL;
269 }
270
271 return regmap_update_bits(rdev->regmap, info->mode_reg,
272 PV88080_BUCK1_MODE_MASK, val);
273}
274
275static int pv88080_set_current_limit(struct regulator_dev *rdev, int min,
276 int max)
277{
278 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
279 int i;
280
281
282 for (i = info->n_current_limits; i >= 0; i--) {
283 if (min <= info->current_limits[i]
284 && max >= info->current_limits[i]) {
285 return regmap_update_bits(rdev->regmap,
286 info->limit_reg,
287 info->limit_mask,
288 i << PV88080_BUCK1_ILIM_SHIFT);
289 }
290 }
291
292 return -EINVAL;
293}
294
295static int pv88080_get_current_limit(struct regulator_dev *rdev)
296{
297 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
298 unsigned int data;
299 int ret;
300
301 ret = regmap_read(rdev->regmap, info->limit_reg, &data);
302 if (ret < 0)
303 return ret;
304
305 data = (data & info->limit_mask) >> PV88080_BUCK1_ILIM_SHIFT;
306 return info->current_limits[data];
307}
308
309static const struct regulator_ops pv88080_buck_ops = {
310 .get_mode = pv88080_buck_get_mode,
311 .set_mode = pv88080_buck_set_mode,
312 .enable = regulator_enable_regmap,
313 .disable = regulator_disable_regmap,
314 .is_enabled = regulator_is_enabled_regmap,
315 .set_voltage_sel = regulator_set_voltage_sel_regmap,
316 .get_voltage_sel = regulator_get_voltage_sel_regmap,
317 .list_voltage = regulator_list_voltage_linear,
318 .set_current_limit = pv88080_set_current_limit,
319 .get_current_limit = pv88080_get_current_limit,
320};
321
322static const struct regulator_ops pv88080_hvbuck_ops = {
323 .enable = regulator_enable_regmap,
324 .disable = regulator_disable_regmap,
325 .is_enabled = regulator_is_enabled_regmap,
326 .set_voltage_sel = regulator_set_voltage_sel_regmap,
327 .get_voltage_sel = regulator_get_voltage_sel_regmap,
328 .list_voltage = regulator_list_voltage_linear,
329};
330
331#define PV88080_BUCK(chip, regl_name, min, step, max, limits_array) \
332{\
333 .desc = {\
334 .id = chip##_ID_##regl_name,\
335 .name = __stringify(chip##_##regl_name),\
336 .of_match = of_match_ptr(#regl_name),\
337 .regulators_node = of_match_ptr("regulators"),\
338 .type = REGULATOR_VOLTAGE,\
339 .owner = THIS_MODULE,\
340 .ops = &pv88080_buck_ops,\
341 .min_uV = min, \
342 .uV_step = step, \
343 .n_voltages = ((max) - (min))/(step) + 1, \
344 },\
345 .current_limits = limits_array, \
346 .n_current_limits = ARRAY_SIZE(limits_array), \
347}
348
349#define PV88080_HVBUCK(chip, regl_name, min, step, max) \
350{\
351 .desc = {\
352 .id = chip##_ID_##regl_name,\
353 .name = __stringify(chip##_##regl_name),\
354 .of_match = of_match_ptr(#regl_name),\
355 .regulators_node = of_match_ptr("regulators"),\
356 .type = REGULATOR_VOLTAGE,\
357 .owner = THIS_MODULE,\
358 .ops = &pv88080_hvbuck_ops,\
359 .min_uV = min, \
360 .uV_step = step, \
361 .n_voltages = ((max) - (min))/(step) + 1, \
362 },\
363}
364
365static struct pv88080_regulator pv88080_regulator_info[] = {
366 PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750,
367 pv88080_buck1_limits),
368 PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750,
369 pv88080_buck23_limits),
370 PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750,
371 pv88080_buck23_limits),
372 PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000),
373};
374
375static irqreturn_t pv88080_irq_handler(int irq, void *data)
376{
377 struct pv88080 *chip = data;
378 int i, reg_val, err, ret = IRQ_NONE;
379
380 err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, ®_val);
381 if (err < 0)
382 goto error_i2c;
383
384 if (reg_val & PV88080_E_VDD_FLT) {
385 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
386 if (chip->rdev[i] != NULL) {
387 regulator_notifier_call_chain(chip->rdev[i],
388 REGULATOR_EVENT_UNDER_VOLTAGE,
389 NULL);
390 }
391 }
392
393 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
394 PV88080_E_VDD_FLT);
395 if (err < 0)
396 goto error_i2c;
397
398 ret = IRQ_HANDLED;
399 }
400
401 if (reg_val & PV88080_E_OVER_TEMP) {
402 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
403 if (chip->rdev[i] != NULL) {
404 regulator_notifier_call_chain(chip->rdev[i],
405 REGULATOR_EVENT_OVER_TEMP,
406 NULL);
407 }
408 }
409
410 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
411 PV88080_E_OVER_TEMP);
412 if (err < 0)
413 goto error_i2c;
414
415 ret = IRQ_HANDLED;
416 }
417
418 return ret;
419
420error_i2c:
421 dev_err(chip->dev, "I2C error : %d\n", err);
422 return IRQ_NONE;
423}
424
425
426
427
428static int pv88080_i2c_probe(struct i2c_client *i2c,
429 const struct i2c_device_id *id)
430{
431 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
432 struct pv88080 *chip;
433 const struct pv88080_compatible_regmap *regmap_config;
434 const struct of_device_id *match;
435 struct regulator_config config = { };
436 int i, error, ret;
437 unsigned int conf2, conf5;
438
439 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL);
440 if (!chip)
441 return -ENOMEM;
442
443 chip->dev = &i2c->dev;
444 chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_regmap_config);
445 if (IS_ERR(chip->regmap)) {
446 error = PTR_ERR(chip->regmap);
447 dev_err(chip->dev, "Failed to allocate register map: %d\n",
448 error);
449 return error;
450 }
451
452 if (i2c->dev.of_node) {
453 match = of_match_node(pv88080_dt_ids, i2c->dev.of_node);
454 if (!match) {
455 dev_err(chip->dev, "Failed to get of_match_node\n");
456 return -EINVAL;
457 }
458 chip->type = (unsigned long)match->data;
459 } else {
460 chip->type = id->driver_data;
461 }
462
463 i2c_set_clientdata(i2c, chip);
464
465 if (i2c->irq != 0) {
466 ret = regmap_write(chip->regmap, PV88080_REG_MASK_A, 0xFF);
467 if (ret < 0) {
468 dev_err(chip->dev,
469 "Failed to mask A reg: %d\n", ret);
470 return ret;
471 }
472 ret = regmap_write(chip->regmap, PV88080_REG_MASK_B, 0xFF);
473 if (ret < 0) {
474 dev_err(chip->dev,
475 "Failed to mask B reg: %d\n", ret);
476 return ret;
477 }
478 ret = regmap_write(chip->regmap, PV88080_REG_MASK_C, 0xFF);
479 if (ret < 0) {
480 dev_err(chip->dev,
481 "Failed to mask C reg: %d\n", ret);
482 return ret;
483 }
484
485 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
486 pv88080_irq_handler,
487 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
488 "pv88080", chip);
489 if (ret != 0) {
490 dev_err(chip->dev, "Failed to request IRQ: %d\n",
491 i2c->irq);
492 return ret;
493 }
494
495 ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A,
496 PV88080_M_VDD_FLT | PV88080_M_OVER_TEMP, 0);
497 if (ret < 0) {
498 dev_err(chip->dev,
499 "Failed to update mask reg: %d\n", ret);
500 return ret;
501 }
502 } else {
503 dev_warn(chip->dev, "No IRQ configured\n");
504 }
505
506 switch (chip->type) {
507 case TYPE_PV88080_AA:
508 chip->regmap_config = &pv88080_aa_regs;
509 break;
510 case TYPE_PV88080_BA:
511 chip->regmap_config = &pv88080_ba_regs;
512 break;
513 }
514
515 regmap_config = chip->regmap_config;
516 config.dev = chip->dev;
517 config.regmap = chip->regmap;
518
519
520 for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) {
521 if (init_data)
522 config.init_data = &init_data[i];
523
524 pv88080_regulator_info[i].limit_reg
525 = regmap_config->buck_regmap[i].buck_limit_reg;
526 pv88080_regulator_info[i].limit_mask
527 = regmap_config->buck_regmap[i].buck_limit_mask;
528 pv88080_regulator_info[i].mode_reg
529 = regmap_config->buck_regmap[i].buck_mode_reg;
530 pv88080_regulator_info[i].conf2
531 = regmap_config->buck_regmap[i].buck_vdac_range_reg;
532 pv88080_regulator_info[i].conf5
533 = regmap_config->buck_regmap[i].buck_vrange_gain_reg;
534 pv88080_regulator_info[i].desc.enable_reg
535 = regmap_config->buck_regmap[i].buck_enable_reg;
536 pv88080_regulator_info[i].desc.enable_mask
537 = regmap_config->buck_regmap[i].buck_enable_mask;
538 pv88080_regulator_info[i].desc.vsel_reg
539 = regmap_config->buck_regmap[i].buck_vsel_reg;
540 pv88080_regulator_info[i].desc.vsel_mask
541 = regmap_config->buck_regmap[i].buck_vsel_mask;
542
543 ret = regmap_read(chip->regmap,
544 pv88080_regulator_info[i].conf2, &conf2);
545 if (ret < 0)
546 return ret;
547 conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) &
548 PV88080_BUCK_VDAC_RANGE_MASK);
549
550 ret = regmap_read(chip->regmap,
551 pv88080_regulator_info[i].conf5, &conf5);
552 if (ret < 0)
553 return ret;
554 conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) &
555 PV88080_BUCK_VRANGE_GAIN_MASK);
556
557 pv88080_regulator_info[i].desc.min_uV =
558 pv88080_buck_vol[conf2].min_uV * (conf5+1);
559 pv88080_regulator_info[i].desc.uV_step =
560 pv88080_buck_vol[conf2].uV_step * (conf5+1);
561 pv88080_regulator_info[i].desc.n_voltages =
562 ((pv88080_buck_vol[conf2].max_uV * (conf5+1))
563 - (pv88080_regulator_info[i].desc.min_uV))
564 /(pv88080_regulator_info[i].desc.uV_step) + 1;
565
566 config.driver_data = (void *)&pv88080_regulator_info[i];
567 chip->rdev[i] = devm_regulator_register(chip->dev,
568 &pv88080_regulator_info[i].desc, &config);
569 if (IS_ERR(chip->rdev[i])) {
570 dev_err(chip->dev,
571 "Failed to register PV88080 regulator\n");
572 return PTR_ERR(chip->rdev[i]);
573 }
574 }
575
576 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg
577 = regmap_config->hvbuck_enable_reg;
578 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask
579 = regmap_config->hvbuck_enable_mask;
580 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg
581 = regmap_config->hvbuck_vsel_reg;
582 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask
583 = regmap_config->hvbuck_vsel_mask;
584
585
586 if (init_data)
587 config.init_data = &init_data[PV88080_ID_HVBUCK];
588
589 config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK];
590 chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev,
591 &pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config);
592 if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) {
593 dev_err(chip->dev, "Failed to register PV88080 regulator\n");
594 return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]);
595 }
596
597 return 0;
598}
599
600static const struct i2c_device_id pv88080_i2c_id[] = {
601 { "pv88080", TYPE_PV88080_AA },
602 { "pv88080-aa", TYPE_PV88080_AA },
603 { "pv88080-ba", TYPE_PV88080_BA },
604 {},
605};
606MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id);
607
608static struct i2c_driver pv88080_regulator_driver = {
609 .driver = {
610 .name = "pv88080",
611 .of_match_table = of_match_ptr(pv88080_dt_ids),
612 },
613 .probe = pv88080_i2c_probe,
614 .id_table = pv88080_i2c_id,
615};
616
617module_i2c_driver(pv88080_regulator_driver);
618
619MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
620MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080");
621MODULE_LICENSE("GPL");
622
