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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / regulator / pv88080-regulator.c
blob9fe539a34786a406d9b61279cd8577e404dd97c2
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/mod_devicetable.h>
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/init.h>
12 #include <linux/slab.h>
13 #include <linux/regulator/driver.h>
14 #include <linux/regulator/machine.h>
15 #include <linux/regmap.h>
16 #include <linux/irq.h>
17 #include <linux/interrupt.h>
18 #include <linux/regulator/of_regulator.h>
19 #include "pv88080-regulator.h"
20
21 #define PV88080_MAX_REGULATORS 4
22
23 /* PV88080 REGULATOR IDs */
24 enum {
25 /* BUCKs */
26 PV88080_ID_BUCK1,
27 PV88080_ID_BUCK2,
28 PV88080_ID_BUCK3,
29 PV88080_ID_HVBUCK,
30 };
31
32 struct pv88080_regulator {
33 struct regulator_desc desc;
34 unsigned int mode_reg;
35 unsigned int conf2;
36 unsigned int conf5;
37 };
38
39 struct pv88080 {
40 struct device *dev;
41 struct regmap *regmap;
42 struct regulator_dev *rdev[PV88080_MAX_REGULATORS];
43 unsigned long type;
44 const struct pv88080_compatible_regmap *regmap_config;
45 };
46
47 struct pv88080_buck_voltage {
48 int min_uV;
49 int max_uV;
50 int uV_step;
51 };
52
53 struct pv88080_buck_regmap {
54 /* REGS */
55 int buck_enable_reg;
56 int buck_vsel_reg;
57 int buck_mode_reg;
58 int buck_limit_reg;
59 int buck_vdac_range_reg;
60 int buck_vrange_gain_reg;
61 /* MASKS */
62 int buck_enable_mask;
63 int buck_vsel_mask;
64 int buck_limit_mask;
65 };
66
67 struct pv88080_compatible_regmap {
68 /* BUCK1, 2, 3 */
69 struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1];
70 /* HVBUCK */
71 int hvbuck_enable_reg;
72 int hvbuck_vsel_reg;
73 int hvbuck_enable_mask;
74 int hvbuck_vsel_mask;
75 };
76
77 static const struct regmap_config pv88080_regmap_config = {
78 .reg_bits = 8,
79 .val_bits = 8,
80 };
81
82 /* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
83 * Entry indexes corresponds to register values.
84 */
85
86 static const unsigned int pv88080_buck1_limits[] = {
87 3230000, 5130000, 6960000, 8790000
88 };
89
90 static const unsigned int pv88080_buck23_limits[] = {
91 1496000, 2393000, 3291000, 4189000
92 };
93
94 static const struct pv88080_buck_voltage pv88080_buck_vol[2] = {
95 {
96 .min_uV = 600000,
97 .max_uV = 1393750,
98 .uV_step = 6250,
99 },
100 {
101 .min_uV = 1400000,
102 .max_uV = 2193750,
103 .uV_step = 6250,
104 },
105 };
106
107 static const struct pv88080_compatible_regmap pv88080_aa_regs = {
108 /* BUCK1 */
109 .buck_regmap[0] = {
110 .buck_enable_reg = PV88080AA_REG_BUCK1_CONF0,
111 .buck_vsel_reg = PV88080AA_REG_BUCK1_CONF0,
112 .buck_mode_reg = PV88080AA_REG_BUCK1_CONF1,
113 .buck_limit_reg = PV88080AA_REG_BUCK1_CONF1,
114 .buck_vdac_range_reg = PV88080AA_REG_BUCK1_CONF2,
115 .buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5,
116 .buck_enable_mask = PV88080_BUCK1_EN,
117 .buck_vsel_mask = PV88080_VBUCK1_MASK,
118 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
119 },
120 /* BUCK2 */
121 .buck_regmap[1] = {
122 .buck_enable_reg = PV88080AA_REG_BUCK2_CONF0,
123 .buck_vsel_reg = PV88080AA_REG_BUCK2_CONF0,
124 .buck_mode_reg = PV88080AA_REG_BUCK2_CONF1,
125 .buck_limit_reg = PV88080AA_REG_BUCK2_CONF1,
126 .buck_vdac_range_reg = PV88080AA_REG_BUCK2_CONF2,
127 .buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5,
128 .buck_enable_mask = PV88080_BUCK2_EN,
129 .buck_vsel_mask = PV88080_VBUCK2_MASK,
130 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
131 },
132 /* BUCK3 */
133 .buck_regmap[2] = {
134 .buck_enable_reg = PV88080AA_REG_BUCK3_CONF0,
135 .buck_vsel_reg = PV88080AA_REG_BUCK3_CONF0,
136 .buck_mode_reg = PV88080AA_REG_BUCK3_CONF1,
137 .buck_limit_reg = PV88080AA_REG_BUCK3_CONF1,
138 .buck_vdac_range_reg = PV88080AA_REG_BUCK3_CONF2,
139 .buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5,
140 .buck_enable_mask = PV88080_BUCK3_EN,
141 .buck_vsel_mask = PV88080_VBUCK3_MASK,
142 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
143 },
144 /* HVBUCK */
145 .hvbuck_enable_reg = PV88080AA_REG_HVBUCK_CONF2,
146 .hvbuck_vsel_reg = PV88080AA_REG_HVBUCK_CONF1,
147 .hvbuck_enable_mask = PV88080_HVBUCK_EN,
148 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
149 };
150
151 static const struct pv88080_compatible_regmap pv88080_ba_regs = {
152 /* BUCK1 */
153 .buck_regmap[0] = {
154 .buck_enable_reg = PV88080BA_REG_BUCK1_CONF0,
155 .buck_vsel_reg = PV88080BA_REG_BUCK1_CONF0,
156 .buck_mode_reg = PV88080BA_REG_BUCK1_CONF1,
157 .buck_limit_reg = PV88080BA_REG_BUCK1_CONF1,
158 .buck_vdac_range_reg = PV88080BA_REG_BUCK1_CONF2,
159 .buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5,
160 .buck_enable_mask = PV88080_BUCK1_EN,
161 .buck_vsel_mask = PV88080_VBUCK1_MASK,
162 .buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
163 },
164 /* BUCK2 */
165 .buck_regmap[1] = {
166 .buck_enable_reg = PV88080BA_REG_BUCK2_CONF0,
167 .buck_vsel_reg = PV88080BA_REG_BUCK2_CONF0,
168 .buck_mode_reg = PV88080BA_REG_BUCK2_CONF1,
169 .buck_limit_reg = PV88080BA_REG_BUCK2_CONF1,
170 .buck_vdac_range_reg = PV88080BA_REG_BUCK2_CONF2,
171 .buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5,
172 .buck_enable_mask = PV88080_BUCK2_EN,
173 .buck_vsel_mask = PV88080_VBUCK2_MASK,
174 .buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
175 },
176 /* BUCK3 */
177 .buck_regmap[2] = {
178 .buck_enable_reg = PV88080BA_REG_BUCK3_CONF0,
179 .buck_vsel_reg = PV88080BA_REG_BUCK3_CONF0,
180 .buck_mode_reg = PV88080BA_REG_BUCK3_CONF1,
181 .buck_limit_reg = PV88080BA_REG_BUCK3_CONF1,
182 .buck_vdac_range_reg = PV88080BA_REG_BUCK3_CONF2,
183 .buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5,
184 .buck_enable_mask = PV88080_BUCK3_EN,
185 .buck_vsel_mask = PV88080_VBUCK3_MASK,
186 .buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
187 },
188 /* HVBUCK */
189 .hvbuck_enable_reg = PV88080BA_REG_HVBUCK_CONF2,
190 .hvbuck_vsel_reg = PV88080BA_REG_HVBUCK_CONF1,
191 .hvbuck_enable_mask = PV88080_HVBUCK_EN,
192 .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
193 };
194
195 static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev)
196 {
197 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
198 unsigned int data;
199 int ret, mode = 0;
200
201 ret = regmap_read(rdev->regmap, info->mode_reg, &data);
202 if (ret < 0)
203 return ret;
204
205 switch (data & PV88080_BUCK1_MODE_MASK) {
206 case PV88080_BUCK_MODE_SYNC:
207 mode = REGULATOR_MODE_FAST;
208 break;
209 case PV88080_BUCK_MODE_AUTO:
210 mode = REGULATOR_MODE_NORMAL;
211 break;
212 case PV88080_BUCK_MODE_SLEEP:
213 mode = REGULATOR_MODE_STANDBY;
214 break;
215 default:
216 return -EINVAL;
217 }
218
219 return mode;
220 }
221
222 static int pv88080_buck_set_mode(struct regulator_dev *rdev,
223 unsigned int mode)
224 {
225 struct pv88080_regulator *info = rdev_get_drvdata(rdev);
226 int val = 0;
227
228 switch (mode) {
229 case REGULATOR_MODE_FAST:
230 val = PV88080_BUCK_MODE_SYNC;
231 break;
232 case REGULATOR_MODE_NORMAL:
233 val = PV88080_BUCK_MODE_AUTO;
234 break;
235 case REGULATOR_MODE_STANDBY:
236 val = PV88080_BUCK_MODE_SLEEP;
237 break;
238 default:
239 return -EINVAL;
240 }
241
242 return regmap_update_bits(rdev->regmap, info->mode_reg,
243 PV88080_BUCK1_MODE_MASK, val);
244 }
245
246 static const struct regulator_ops pv88080_buck_ops = {
247 .get_mode = pv88080_buck_get_mode,
248 .set_mode = pv88080_buck_set_mode,
249 .enable = regulator_enable_regmap,
250 .disable = regulator_disable_regmap,
251 .is_enabled = regulator_is_enabled_regmap,
252 .set_voltage_sel = regulator_set_voltage_sel_regmap,
253 .get_voltage_sel = regulator_get_voltage_sel_regmap,
254 .list_voltage = regulator_list_voltage_linear,
255 .set_current_limit = regulator_set_current_limit_regmap,
256 .get_current_limit = regulator_get_current_limit_regmap,
257 };
258
259 static const struct regulator_ops pv88080_hvbuck_ops = {
260 .enable = regulator_enable_regmap,
261 .disable = regulator_disable_regmap,
262 .is_enabled = regulator_is_enabled_regmap,
263 .set_voltage_sel = regulator_set_voltage_sel_regmap,
264 .get_voltage_sel = regulator_get_voltage_sel_regmap,
265 .list_voltage = regulator_list_voltage_linear,
266 };
267
268 #define PV88080_BUCK(chip, regl_name, min, step, max, limits_array) \
269 {\
270 .desc = {\
271 .id = chip##_ID_##regl_name,\
272 .name = __stringify(chip##_##regl_name),\
273 .of_match = of_match_ptr(#regl_name),\
274 .regulators_node = of_match_ptr("regulators"),\
275 .type = REGULATOR_VOLTAGE,\
276 .owner = THIS_MODULE,\
277 .ops = &pv88080_buck_ops,\
278 .min_uV = min, \
279 .uV_step = step, \
280 .n_voltages = ((max) - (min))/(step) + 1, \
281 .curr_table = limits_array, \
282 .n_current_limits = ARRAY_SIZE(limits_array), \
283 },\
284 }
285
286 #define PV88080_HVBUCK(chip, regl_name, min, step, max) \
287 {\
288 .desc = {\
289 .id = chip##_ID_##regl_name,\
290 .name = __stringify(chip##_##regl_name),\
291 .of_match = of_match_ptr(#regl_name),\
292 .regulators_node = of_match_ptr("regulators"),\
293 .type = REGULATOR_VOLTAGE,\
294 .owner = THIS_MODULE,\
295 .ops = &pv88080_hvbuck_ops,\
296 .min_uV = min, \
297 .uV_step = step, \
298 .n_voltages = ((max) - (min))/(step) + 1, \
299 },\
300 }
301
302 static struct pv88080_regulator pv88080_regulator_info[] = {
303 PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750,
304 pv88080_buck1_limits),
305 PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750,
306 pv88080_buck23_limits),
307 PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750,
308 pv88080_buck23_limits),
309 PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000),
310 };
311
312 static irqreturn_t pv88080_irq_handler(int irq, void *data)
313 {
314 struct pv88080 *chip = data;
315 int i, reg_val, err, ret = IRQ_NONE;
316
317 err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, &reg_val);
318 if (err < 0)
319 goto error_i2c;
320
321 if (reg_val & PV88080_E_VDD_FLT) {
322 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
323 if (chip->rdev[i] != NULL)
324 regulator_notifier_call_chain(chip->rdev[i],
325 REGULATOR_EVENT_UNDER_VOLTAGE,
326 NULL);
327 }
328
329 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
330 PV88080_E_VDD_FLT);
331 if (err < 0)
332 goto error_i2c;
333
334 ret = IRQ_HANDLED;
335 }
336
337 if (reg_val & PV88080_E_OVER_TEMP) {
338 for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
339 if (chip->rdev[i] != NULL)
340 regulator_notifier_call_chain(chip->rdev[i],
341 REGULATOR_EVENT_OVER_TEMP,
342 NULL);
343 }
344
345 err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
346 PV88080_E_OVER_TEMP);
347 if (err < 0)
348 goto error_i2c;
349
350 ret = IRQ_HANDLED;
351 }
352
353 return ret;
354
355 error_i2c:
356 dev_err(chip->dev, "I2C error : %d\n", err);
357 return IRQ_NONE;
358 }
359
360 /*
361 * I2C driver interface functions
362 */
363 static int pv88080_i2c_probe(struct i2c_client *i2c)
364 {
365 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
366 struct pv88080 *chip;
367 const struct pv88080_compatible_regmap *regmap_config;
368 struct regulator_config config = { };
369 int i, error, ret;
370 unsigned int conf2, conf5;
371
372 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL);
373 if (!chip)
374 return -ENOMEM;
375
376 chip->dev = &i2c->dev;
377 chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_regmap_config);
378 if (IS_ERR(chip->regmap)) {
379 error = PTR_ERR(chip->regmap);
380 dev_err(chip->dev, "Failed to allocate register map: %d\n",
381 error);
382 return error;
383 }
384
385 chip->regmap_config = i2c_get_match_data(i2c);
386 if (!chip->regmap_config)
387 return -ENODEV;
388
389 i2c_set_clientdata(i2c, chip);
390
391 if (i2c->irq != 0) {
392 ret = regmap_write(chip->regmap, PV88080_REG_MASK_A, 0xFF);
393 if (ret < 0) {
394 dev_err(chip->dev,
395 "Failed to mask A reg: %d\n", ret);
396 return ret;
397 }
398 ret = regmap_write(chip->regmap, PV88080_REG_MASK_B, 0xFF);
399 if (ret < 0) {
400 dev_err(chip->dev,
401 "Failed to mask B reg: %d\n", ret);
402 return ret;
403 }
404 ret = regmap_write(chip->regmap, PV88080_REG_MASK_C, 0xFF);
405 if (ret < 0) {
406 dev_err(chip->dev,
407 "Failed to mask C reg: %d\n", ret);
408 return ret;
409 }
410
411 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
412 pv88080_irq_handler,
413 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
414 "pv88080", chip);
415 if (ret != 0) {
416 dev_err(chip->dev, "Failed to request IRQ: %d\n",
417 i2c->irq);
418 return ret;
419 }
420
421 ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A,
422 PV88080_M_VDD_FLT | PV88080_M_OVER_TEMP, 0);
423 if (ret < 0) {
424 dev_err(chip->dev,
425 "Failed to update mask reg: %d\n", ret);
426 return ret;
427 }
428 } else {
429 dev_warn(chip->dev, "No IRQ configured\n");
430 }
431
432 regmap_config = chip->regmap_config;
433 config.dev = chip->dev;
434 config.regmap = chip->regmap;
435
436 /* Registeration for BUCK1, 2, 3 */
437 for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) {
438 if (init_data)
439 config.init_data = &init_data[i];
440
441 pv88080_regulator_info[i].desc.csel_reg
442 = regmap_config->buck_regmap[i].buck_limit_reg;
443 pv88080_regulator_info[i].desc.csel_mask
444 = regmap_config->buck_regmap[i].buck_limit_mask;
445 pv88080_regulator_info[i].mode_reg
446 = regmap_config->buck_regmap[i].buck_mode_reg;
447 pv88080_regulator_info[i].conf2
448 = regmap_config->buck_regmap[i].buck_vdac_range_reg;
449 pv88080_regulator_info[i].conf5
450 = regmap_config->buck_regmap[i].buck_vrange_gain_reg;
451 pv88080_regulator_info[i].desc.enable_reg
452 = regmap_config->buck_regmap[i].buck_enable_reg;
453 pv88080_regulator_info[i].desc.enable_mask
454 = regmap_config->buck_regmap[i].buck_enable_mask;
455 pv88080_regulator_info[i].desc.vsel_reg
456 = regmap_config->buck_regmap[i].buck_vsel_reg;
457 pv88080_regulator_info[i].desc.vsel_mask
458 = regmap_config->buck_regmap[i].buck_vsel_mask;
459
460 ret = regmap_read(chip->regmap,
461 pv88080_regulator_info[i].conf2, &conf2);
462 if (ret < 0)
463 return ret;
464 conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) &
465 PV88080_BUCK_VDAC_RANGE_MASK);
466
467 ret = regmap_read(chip->regmap,
468 pv88080_regulator_info[i].conf5, &conf5);
469 if (ret < 0)
470 return ret;
471 conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) &
472 PV88080_BUCK_VRANGE_GAIN_MASK);
473
474 pv88080_regulator_info[i].desc.min_uV =
475 pv88080_buck_vol[conf2].min_uV * (conf5+1);
476 pv88080_regulator_info[i].desc.uV_step =
477 pv88080_buck_vol[conf2].uV_step * (conf5+1);
478 pv88080_regulator_info[i].desc.n_voltages =
479 ((pv88080_buck_vol[conf2].max_uV * (conf5+1))
480 - (pv88080_regulator_info[i].desc.min_uV))
481 /(pv88080_regulator_info[i].desc.uV_step) + 1;
482
483 config.driver_data = (void *)&pv88080_regulator_info[i];
484 chip->rdev[i] = devm_regulator_register(chip->dev,
485 &pv88080_regulator_info[i].desc, &config);
486 if (IS_ERR(chip->rdev[i])) {
487 dev_err(chip->dev,
488 "Failed to register PV88080 regulator\n");
489 return PTR_ERR(chip->rdev[i]);
490 }
491 }
492
493 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg
494 = regmap_config->hvbuck_enable_reg;
495 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask
496 = regmap_config->hvbuck_enable_mask;
497 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg
498 = regmap_config->hvbuck_vsel_reg;
499 pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask
500 = regmap_config->hvbuck_vsel_mask;
501
502 /* Registeration for HVBUCK */
503 if (init_data)
504 config.init_data = &init_data[PV88080_ID_HVBUCK];
505
506 config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK];
507 chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev,
508 &pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config);
509 if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) {
510 dev_err(chip->dev, "Failed to register PV88080 regulator\n");
511 return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]);
512 }
513
514 return 0;
515 }
516
517 static const struct of_device_id pv88080_dt_ids[] = {
518 { .compatible = "pvs,pv88080", .data = &pv88080_aa_regs },
519 { .compatible = "pvs,pv88080-aa", .data = &pv88080_aa_regs },
520 { .compatible = "pvs,pv88080-ba", .data = &pv88080_ba_regs },
521 {}
522 };
523 MODULE_DEVICE_TABLE(of, pv88080_dt_ids);
524
525 static const struct i2c_device_id pv88080_i2c_id[] = {
526 { "pv88080", (kernel_ulong_t)&pv88080_aa_regs },
527 { "pv88080-aa", (kernel_ulong_t)&pv88080_aa_regs },
528 { "pv88080-ba", (kernel_ulong_t)&pv88080_ba_regs },
529 {}
530 };
531 MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id);
532
533 static struct i2c_driver pv88080_regulator_driver = {
534 .driver = {
535 .name = "pv88080",
536 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
537 .of_match_table = pv88080_dt_ids,
538 },
539 .probe = pv88080_i2c_probe,
540 .id_table = pv88080_i2c_id,
541 };
542
543 module_i2c_driver(pv88080_regulator_driver);
544
545 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
546 MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080");
547 MODULE_LICENSE("GPL");
Kernel DRM miscellaneous fixes and cross-tree changes