1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // pv88080-regulator.c - Regulator device driver for PV88080
4 // Copyright (C) 2016 Powerventure Semiconductor Ltd.
5
6 #include <linux/err.h>
7 #include <linux/i2c.h>
8 #include <linux/module.h>
9 #include <linux/of.h>
10 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/regulator/driver.h>
13 #include <linux/regulator/machine.h>
14 #include <linux/regmap.h>
15 #include <linux/irq.h>
16 #include <linux/interrupt.h>
17 #include <linux/regulator/of_regulator.h>
18 #include "pv88080-regulator.h"
19
20 #define PV88080_MAX_REGULATORS 4
21
22 /* PV88080 REGULATOR IDs */
23 enum {
24 /* BUCKs */
25 PV88080_ID_BUCK1,
26 PV88080_ID_BUCK2,
27 PV88080_ID_BUCK3,
28 PV88080_ID_HVBUCK,
29 };
30
31 enum pv88080_types {
32 TYPE_PV88080_AA,
33 TYPE_PV88080_BA,
34 };
35
36 struct pv88080_regulator {
37 struct regulator_desc desc;
38 unsigned int mode_reg;
39 unsigned int conf2;
40 unsigned int conf5;
41 };
42
43 struct pv88080 {
44 struct device *dev;
45 struct regmap *regmap;
46 struct regulator_dev *rdev[PV88080_MAX_REGULATORS];
47 unsigned long type;
48 const struct pv88080_compatible_regmap *regmap_config;
49 };
50
51 struct pv88080_buck_voltage {
52 int min_uV;
53 int max_uV;
54 int uV_step;
55 };
56
57 struct pv88080_buck_regmap {
58 /* REGS */
59 int buck_enable_reg;
60 int buck_vsel_reg;
61 int buck_mode_reg;
62 int buck_limit_reg;
63 int buck_vdac_range_reg;
64 int buck_vrange_gain_reg;
65 /* MASKS */
66 int buck_enable_mask;
67 int buck_vsel_mask;
68 int buck_limit_mask;
69 };
70
71 struct pv88080_compatible_regmap {
72 /* BUCK1, 2, 3 */
73 struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1];
74 /* HVBUCK */
75 int hvbuck_enable_reg;
76 int hvbuck_vsel_reg;
77 int hvbuck_enable_mask;
78 int hvbuck_vsel_mask;
79 };
80
81 static const struct regmap_config pv88080_regmap_config = {
82 .reg_bits = 8,
83 .val_bits = 8,
84 };
85
86 /* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
87 * Entry indexes corresponds to register values.
88 */
89
90 static const unsigned int pv88080_buck1_limits[] = {
91 3230000, 5130000, 6960000, 8790000
92 };
93
94 static const unsigned int pv88080_buck23_limits[] = {
95 1496000, 2393000, 3291000, 4189000
96 };
97
98 static const struct pv88080_buck_voltage pv88080_buck_vol[2] = {
99 {
100 .min_uV = 600000,
101 .max_uV = 1393750,
102 .uV_step = 6250,
103 },
104 {
105 .min_uV = 1400000,
106 .max_uV = 2193750,
107 .uV_step = 6250,
108 },
109 };
110
111 static const struct pv88080_compatible_regmap pv88080_aa_regs = {
112 /* BUCK1 */
113 .buck_regmap[0] = {
114 .buck_enable_reg = PV88080AA_REG_BUCK1_CONF0,
115 .buck_vsel_reg = PV88080AA_REG_BUCK1_CONF0,
116 .buck_mode_reg = PV88080AA_REG_BUCK1_CONF1,
117 .buck_limit_reg = PV88080AA_REG_BUCK1_CONF1,
118 .buck_vdac_range_reg = PV88080AA_REG_BUCK1_CONF2,
119 .buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5,
120 .buck_enable_mask = PV88080_BUCK1_EN,
121 .buck_vsel_mask = PV88080_VBUCK1_MASK,
122 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
123 },
124 /* BUCK2 */
125 .buck_regmap[1] = {
126 .buck_enable_reg = PV88080AA_REG_BUCK2_CONF0,
127 .buck_vsel_reg = PV88080AA_REG_BUCK2_CONF0,
128 .buck_mode_reg = PV88080AA_REG_BUCK2_CONF1,
129 .buck_limit_reg = PV88080AA_REG_BUCK2_CONF1,
130 .buck_vdac_range_reg = PV88080AA_REG_BUCK2_CONF2,
131 .buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5,
132 .buck_enable_mask = PV88080_BUCK2_EN,
133 .buck_vsel_mask = PV88080_VBUCK2_MASK,
134 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
135 },
136 /* BUCK3 */
137 .buck_regmap[2] = {
138 .buck_enable_reg = PV88080AA_REG_BUCK3_CONF0,
139 .buck_vsel_reg = PV88080AA_REG_BUCK3_CONF0,
140 .buck_mode_reg = PV88080AA_REG_BUCK3_CONF1,
141 .buck_limit_reg = PV88080AA_REG_BUCK3_CONF1,
142 .buck_vdac_range_reg = PV88080AA_REG_BUCK3_CONF2,
143 .buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5,
144 .buck_enable_mask = PV88080_BUCK3_EN,
145 .buck_vsel_mask = PV88080_VBUCK3_MASK,
146 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
147 },
148 /* HVBUCK */
149 .hvbuck_enable_reg = PV88080AA_REG_HVBUCK_CONF2,
150 .hvbuck_vsel_reg = PV88080AA_REG_HVBUCK_CONF1,
151 .hvbuck_enable_mask = PV88080_HVBUCK_EN,
152 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
153 };
154
155 static const struct pv88080_compatible_regmap pv88080_ba_regs = {
156 /* BUCK1 */
157 .buck_regmap[0] = {
158 .buck_enable_reg = PV88080BA_REG_BUCK1_CONF0,
159 .buck_vsel_reg = PV88080BA_REG_BUCK1_CONF0,
160 .buck_mode_reg = PV88080BA_REG_BUCK1_CONF1,
161 .buck_limit_reg = PV88080BA_REG_BUCK1_CONF1,
162 .buck_vdac_range_reg = PV88080BA_REG_BUCK1_CONF2,
163 .buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5,
164 .buck_enable_mask = PV88080_BUCK1_EN,
165 .buck_vsel_mask = PV88080_VBUCK1_MASK,
166 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
167 },
168 /* BUCK2 */
169 .buck_regmap[1] = {
170 .buck_enable_reg = PV88080BA_REG_BUCK2_CONF0,
171 .buck_vsel_reg = PV88080BA_REG_BUCK2_CONF0,
172 .buck_mode_reg = PV88080BA_REG_BUCK2_CONF1,
173 .buck_limit_reg = PV88080BA_REG_BUCK2_CONF1,
174 .buck_vdac_range_reg = PV88080BA_REG_BUCK2_CONF2,
175 .buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5,
176 .buck_enable_mask = PV88080_BUCK2_EN,
177 .buck_vsel_mask = PV88080_VBUCK2_MASK,
178 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
179 },
180 /* BUCK3 */
181 .buck_regmap[2] = {
182 .buck_enable_reg = PV88080BA_REG_BUCK3_CONF0,
183 .buck_vsel_reg = PV88080BA_REG_BUCK3_CONF0,
184 .buck_mode_reg = PV88080BA_REG_BUCK3_CONF1,
185 .buck_limit_reg = PV88080BA_REG_BUCK3_CONF1,
186 .buck_vdac_range_reg = PV88080BA_REG_BUCK3_CONF2,
187 .buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5,
188 .buck_enable_mask = PV88080_BUCK3_EN,
189 .buck_vsel_mask = PV88080_VBUCK3_MASK,
190 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
191 },
192 /* HVBUCK */
193 .hvbuck_enable_reg = PV88080BA_REG_HVBUCK_CONF2,
194 .hvbuck_vsel_reg = PV88080BA_REG_HVBUCK_CONF1,
195 .hvbuck_enable_mask = PV88080_HVBUCK_EN,
196 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
197 };
198
199 #ifdef CONFIG_OF
200 static const struct of_device_id pv88080_dt_ids[] = {
201 { .compatible = "pvs,pv88080", .data = (void *)TYPE_PV88080_AA },
202 { .compatible = "pvs,pv88080-aa", .data = (void *)TYPE_PV88080_AA },
203 { .compatible = "pvs,pv88080-ba", .data = (void *)TYPE_PV88080_BA },
204 {},
205 };
206 MODULE_DEVICE_TABLE(of, pv88080_dt_ids);
207 #endif
208
pv88080_buck_get_mode(struct regulator_dev * rdev)209 static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev)
210 {
211 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
212 unsigned int data;
213 int ret, mode = 0;
214
215 ret = regmap_read(rdev->regmap, info->mode_reg, &data);
216 if (ret < 0)
217 return ret;
218
219 switch (data & PV88080_BUCK1_MODE_MASK) {
220 case PV88080_BUCK_MODE_SYNC:
221 mode = REGULATOR_MODE_FAST;
222 break;
223 case PV88080_BUCK_MODE_AUTO:
224 mode = REGULATOR_MODE_NORMAL;
225 break;
226 case PV88080_BUCK_MODE_SLEEP:
227 mode = REGULATOR_MODE_STANDBY;
228 break;
229 default:
230 return -EINVAL;
231 }
232
233 return mode;
234 }
235
pv88080_buck_set_mode(struct regulator_dev * rdev,unsigned int mode)236 static int pv88080_buck_set_mode(struct regulator_dev *rdev,
237 unsigned int mode)
238 {
239 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
240 int val = 0;
241
242 switch (mode) {
243 case REGULATOR_MODE_FAST:
244 val = PV88080_BUCK_MODE_SYNC;
245 break;
246 case REGULATOR_MODE_NORMAL:
247 val = PV88080_BUCK_MODE_AUTO;
248 break;
249 case REGULATOR_MODE_STANDBY:
250 val = PV88080_BUCK_MODE_SLEEP;
251 break;
252 default:
253 return -EINVAL;
254 }
255
256 return regmap_update_bits(rdev->regmap, info->mode_reg,
257 PV88080_BUCK1_MODE_MASK, val);
258 }
259
260 static const struct regulator_ops pv88080_buck_ops = {
261 .get_mode = pv88080_buck_get_mode,
262 .set_mode = pv88080_buck_set_mode,
263 .enable = regulator_enable_regmap,
264 .disable = regulator_disable_regmap,
265 .is_enabled = regulator_is_enabled_regmap,
266 .set_voltage_sel = regulator_set_voltage_sel_regmap,
267 .get_voltage_sel = regulator_get_voltage_sel_regmap,
268 .list_voltage = regulator_list_voltage_linear,
269 .set_current_limit = regulator_set_current_limit_regmap,
270 .get_current_limit = regulator_get_current_limit_regmap,
271 };
272
273 static const struct regulator_ops pv88080_hvbuck_ops = {
274 .enable = regulator_enable_regmap,
275 .disable = regulator_disable_regmap,
276 .is_enabled = regulator_is_enabled_regmap,
277 .set_voltage_sel = regulator_set_voltage_sel_regmap,
278 .get_voltage_sel = regulator_get_voltage_sel_regmap,
279 .list_voltage = regulator_list_voltage_linear,
280 };
281
282 #define PV88080_BUCK(chip, regl_name, min, step, max, limits_array) \
283 {\
284 .desc = {\
285 .id = chip##_ID_##regl_name,\
286 .name = __stringify(chip##_##regl_name),\
287 .of_match = of_match_ptr(#regl_name),\
288 .regulators_node = of_match_ptr("regulators"),\
289 .type = REGULATOR_VOLTAGE,\
290 .owner = THIS_MODULE,\
291 .ops = &pv88080_buck_ops,\
292 .min_uV = min, \
293 .uV_step = step, \
294 .n_voltages = ((max) - (min))/(step) + 1, \
295 .curr_table = limits_array, \
296 .n_current_limits = ARRAY_SIZE(limits_array), \
297 },\
298 }
299
300 #define PV88080_HVBUCK(chip, regl_name, min, step, max) \
301 {\
302 .desc = {\
303 .id = chip##_ID_##regl_name,\
304 .name = __stringify(chip##_##regl_name),\
305 .of_match = of_match_ptr(#regl_name),\
306 .regulators_node = of_match_ptr("regulators"),\
307 .type = REGULATOR_VOLTAGE,\
308 .owner = THIS_MODULE,\
309 .ops = &pv88080_hvbuck_ops,\
310 .min_uV = min, \
311 .uV_step = step, \
312 .n_voltages = ((max) - (min))/(step) + 1, \
313 },\
314 }
315
316 static struct pv88080_regulator pv88080_regulator_info[] = {
317 PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750,
318 pv88080_buck1_limits),
319 PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750,
320 pv88080_buck23_limits),
321 PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750,
322 pv88080_buck23_limits),
323 PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000),
324 };
325
pv88080_irq_handler(int irq,void * data)326 static irqreturn_t pv88080_irq_handler(int irq, void *data)
327 {
328 struct pv88080 *chip = data;
329 int i, reg_val, err, ret = IRQ_NONE;
330
331 err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, ®_val);
332 if (err < 0)
333 goto error_i2c;
334
335 if (reg_val & PV88080_E_VDD_FLT) {
336 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
337 if (chip->rdev[i] != NULL)
338 regulator_notifier_call_chain(chip->rdev[i],
339 REGULATOR_EVENT_UNDER_VOLTAGE,
340 NULL);
341 }
342
343 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
344 PV88080_E_VDD_FLT);
345 if (err < 0)
346 goto error_i2c;
347
348 ret = IRQ_HANDLED;
349 }
350
351 if (reg_val & PV88080_E_OVER_TEMP) {
352 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
353 if (chip->rdev[i] != NULL)
354 regulator_notifier_call_chain(chip->rdev[i],
355 REGULATOR_EVENT_OVER_TEMP,
356 NULL);
357 }
358
359 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
360 PV88080_E_OVER_TEMP);
361 if (err < 0)
362 goto error_i2c;
363
364 ret = IRQ_HANDLED;
365 }
366
367 return ret;
368
369 error_i2c:
370 dev_err(chip->dev, "I2C error : %d\n", err);
371 return IRQ_NONE;
372 }
373
374 /*
375 * I2C driver interface functions
376 */
pv88080_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)377 static int pv88080_i2c_probe(struct i2c_client *i2c,
378 const struct i2c_device_id *id)
379 {
380 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
381 struct pv88080 *chip;
382 const struct pv88080_compatible_regmap *regmap_config;
383 const struct of_device_id *match;
384 struct regulator_config config = { };
385 int i, error, ret;
386 unsigned int conf2, conf5;
387
388 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL);
389 if (!chip)
390 return -ENOMEM;
391
392 chip->dev = &i2c->dev;
393 chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_regmap_config);
394 if (IS_ERR(chip->regmap)) {
395 error = PTR_ERR(chip->regmap);
396 dev_err(chip->dev, "Failed to allocate register map: %d\n",
397 error);
398 return error;
399 }
400
401 if (i2c->dev.of_node) {
402 match = of_match_node(pv88080_dt_ids, i2c->dev.of_node);
403 if (!match) {
404 dev_err(chip->dev, "Failed to get of_match_node\n");
405 return -EINVAL;
406 }
407 chip->type = (unsigned long)match->data;
408 } else {
409 chip->type = id->driver_data;
410 }
411
412 i2c_set_clientdata(i2c, chip);
413
414 if (i2c->irq != 0) {
415 ret = regmap_write(chip->regmap, PV88080_REG_MASK_A, 0xFF);
416 if (ret < 0) {
417 dev_err(chip->dev,
418 "Failed to mask A reg: %d\n", ret);
419 return ret;
420 }
421 ret = regmap_write(chip->regmap, PV88080_REG_MASK_B, 0xFF);
422 if (ret < 0) {
423 dev_err(chip->dev,
424 "Failed to mask B reg: %d\n", ret);
425 return ret;
426 }
427 ret = regmap_write(chip->regmap, PV88080_REG_MASK_C, 0xFF);
428 if (ret < 0) {
429 dev_err(chip->dev,
430 "Failed to mask C reg: %d\n", ret);
431 return ret;
432 }
433
434 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
435 pv88080_irq_handler,
436 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
437 "pv88080", chip);
438 if (ret != 0) {
439 dev_err(chip->dev, "Failed to request IRQ: %d\n",
440 i2c->irq);
441 return ret;
442 }
443
444 ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A,
445 PV88080_M_VDD_FLT | PV88080_M_OVER_TEMP, 0);
446 if (ret < 0) {
447 dev_err(chip->dev,
448 "Failed to update mask reg: %d\n", ret);
449 return ret;
450 }
451 } else {
452 dev_warn(chip->dev, "No IRQ configured\n");
453 }
454
455 switch (chip->type) {
456 case TYPE_PV88080_AA:
457 chip->regmap_config = &pv88080_aa_regs;
458 break;
459 case TYPE_PV88080_BA:
460 chip->regmap_config = &pv88080_ba_regs;
461 break;
462 }
463
464 regmap_config = chip->regmap_config;
465 config.dev = chip->dev;
466 config.regmap = chip->regmap;
467
468 /* Registeration for BUCK1, 2, 3 */
469 for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) {
470 if (init_data)
471 config.init_data = &init_data[i];
472
473 pv88080_regulator_info[i].desc.csel_reg
474 = regmap_config->buck_regmap[i].buck_limit_reg;
475 pv88080_regulator_info[i].desc.csel_mask
476 = regmap_config->buck_regmap[i].buck_limit_mask;
477 pv88080_regulator_info[i].mode_reg
478 = regmap_config->buck_regmap[i].buck_mode_reg;
479 pv88080_regulator_info[i].conf2
480 = regmap_config->buck_regmap[i].buck_vdac_range_reg;
481 pv88080_regulator_info[i].conf5
482 = regmap_config->buck_regmap[i].buck_vrange_gain_reg;
483 pv88080_regulator_info[i].desc.enable_reg
484 = regmap_config->buck_regmap[i].buck_enable_reg;
485 pv88080_regulator_info[i].desc.enable_mask
486 = regmap_config->buck_regmap[i].buck_enable_mask;
487 pv88080_regulator_info[i].desc.vsel_reg
488 = regmap_config->buck_regmap[i].buck_vsel_reg;
489 pv88080_regulator_info[i].desc.vsel_mask
490 = regmap_config->buck_regmap[i].buck_vsel_mask;
491
492 ret = regmap_read(chip->regmap,
493 pv88080_regulator_info[i].conf2, &conf2);
494 if (ret < 0)
495 return ret;
496 conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) &
497 PV88080_BUCK_VDAC_RANGE_MASK);
498
499 ret = regmap_read(chip->regmap,
500 pv88080_regulator_info[i].conf5, &conf5);
501 if (ret < 0)
502 return ret;
503 conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) &
504 PV88080_BUCK_VRANGE_GAIN_MASK);
505
506 pv88080_regulator_info[i].desc.min_uV =
507 pv88080_buck_vol[conf2].min_uV * (conf5+1);
508 pv88080_regulator_info[i].desc.uV_step =
509 pv88080_buck_vol[conf2].uV_step * (conf5+1);
510 pv88080_regulator_info[i].desc.n_voltages =
511 ((pv88080_buck_vol[conf2].max_uV * (conf5+1))
512 - (pv88080_regulator_info[i].desc.min_uV))
513 /(pv88080_regulator_info[i].desc.uV_step) + 1;
514
515 config.driver_data = (void *)&pv88080_regulator_info[i];
516 chip->rdev[i] = devm_regulator_register(chip->dev,
517 &pv88080_regulator_info[i].desc, &config);
518 if (IS_ERR(chip->rdev[i])) {
519 dev_err(chip->dev,
520 "Failed to register PV88080 regulator\n");
521 return PTR_ERR(chip->rdev[i]);
522 }
523 }
524
525 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg
526 = regmap_config->hvbuck_enable_reg;
527 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask
528 = regmap_config->hvbuck_enable_mask;
529 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg
530 = regmap_config->hvbuck_vsel_reg;
531 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask
532 = regmap_config->hvbuck_vsel_mask;
533
534 /* Registeration for HVBUCK */
535 if (init_data)
536 config.init_data = &init_data[PV88080_ID_HVBUCK];
537
538 config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK];
539 chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev,
540 &pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config);
541 if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) {
542 dev_err(chip->dev, "Failed to register PV88080 regulator\n");
543 return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]);
544 }
545
546 return 0;
547 }
548
549 static const struct i2c_device_id pv88080_i2c_id[] = {
550 { "pv88080", TYPE_PV88080_AA },
551 { "pv88080-aa", TYPE_PV88080_AA },
552 { "pv88080-ba", TYPE_PV88080_BA },
553 {},
554 };
555 MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id);
556
557 static struct i2c_driver pv88080_regulator_driver = {
558 .driver = {
559 .name = "pv88080",
560 .of_match_table = of_match_ptr(pv88080_dt_ids),
561 },
562 .probe = pv88080_i2c_probe,
563 .id_table = pv88080_i2c_id,
564 };
565
566 module_i2c_driver(pv88080_regulator_driver);
567
568 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
569 MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080");
570 MODULE_LICENSE("GPL");
571