1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2020 ROHM Semiconductors
3 // ROHM BD9576MUF/BD9573MUF regulator driver
4
5 #include <linux/err.h>
6 #include <linux/gpio/consumer.h>
7 #include <linux/interrupt.h>
8 #include <linux/jiffies.h>
9 #include <linux/kernel.h>
10 #include <linux/mfd/rohm-bd957x.h>
11 #include <linux/mfd/rohm-generic.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/platform_device.h>
15 #include <linux/property.h>
16 #include <linux/regulator/driver.h>
17 #include <linux/regulator/machine.h>
18 #include <linux/regulator/of_regulator.h>
19 #include <linux/slab.h>
20 #include <linux/spinlock.h>
21 #include <linux/workqueue.h>
22
23 #define BD957X_VOUTS1_VOLT 3300000
24 #define BD957X_VOUTS4_BASE_VOLT 1030000
25 #define BD957X_VOUTS34_NUM_VOLT 32
26
27 #define BD9576_THERM_IRQ_MASK_TW BIT(5)
28 #define BD9576_xVD_IRQ_MASK_VOUTL1 BIT(5)
29 #define BD9576_UVD_IRQ_MASK_VOUTS1_OCW BIT(6)
30 #define BD9576_xVD_IRQ_MASK_VOUT1TO4 0x0F
31
32 static const unsigned int vout1_volt_table[] = {
33 5000000, 4900000, 4800000, 4700000, 4600000,
34 4500000, 4500000, 4500000, 5000000, 5100000,
35 5200000, 5300000, 5400000, 5500000, 5500000,
36 5500000
37 };
38
39 static const unsigned int vout2_volt_table[] = {
40 1800000, 1780000, 1760000, 1740000, 1720000,
41 1700000, 1680000, 1660000, 1800000, 1820000,
42 1840000, 1860000, 1880000, 1900000, 1920000,
43 1940000
44 };
45
46 static const unsigned int voutl1_volt_table[] = {
47 2500000, 2540000, 2580000, 2620000, 2660000,
48 2700000, 2740000, 2780000, 2500000, 2460000,
49 2420000, 2380000, 2340000, 2300000, 2260000,
50 2220000
51 };
52
53 static const struct linear_range vout1_xvd_ranges[] = {
54 REGULATOR_LINEAR_RANGE(225000, 0x01, 0x2b, 0),
55 REGULATOR_LINEAR_RANGE(225000, 0x2c, 0x54, 5000),
56 REGULATOR_LINEAR_RANGE(425000, 0x55, 0x7f, 0),
57 };
58
59 static const struct linear_range vout234_xvd_ranges[] = {
60 REGULATOR_LINEAR_RANGE(17000, 0x01, 0x0f, 0),
61 REGULATOR_LINEAR_RANGE(17000, 0x10, 0x6d, 1000),
62 REGULATOR_LINEAR_RANGE(110000, 0x6e, 0x7f, 0),
63 };
64
65 static const struct linear_range voutL1_xvd_ranges[] = {
66 REGULATOR_LINEAR_RANGE(34000, 0x01, 0x0f, 0),
67 REGULATOR_LINEAR_RANGE(34000, 0x10, 0x6d, 2000),
68 REGULATOR_LINEAR_RANGE(220000, 0x6e, 0x7f, 0),
69 };
70
71 static struct linear_range voutS1_ocw_ranges_internal[] = {
72 REGULATOR_LINEAR_RANGE(200000, 0x01, 0x04, 0),
73 REGULATOR_LINEAR_RANGE(250000, 0x05, 0x18, 50000),
74 REGULATOR_LINEAR_RANGE(1200000, 0x19, 0x3f, 0),
75 };
76
77 static struct linear_range voutS1_ocw_ranges[] = {
78 REGULATOR_LINEAR_RANGE(50000, 0x01, 0x04, 0),
79 REGULATOR_LINEAR_RANGE(60000, 0x05, 0x18, 10000),
80 REGULATOR_LINEAR_RANGE(250000, 0x19, 0x3f, 0),
81 };
82
83 static struct linear_range voutS1_ocp_ranges_internal[] = {
84 REGULATOR_LINEAR_RANGE(300000, 0x01, 0x06, 0),
85 REGULATOR_LINEAR_RANGE(350000, 0x7, 0x1b, 50000),
86 REGULATOR_LINEAR_RANGE(1350000, 0x1c, 0x3f, 0),
87 };
88
89 static struct linear_range voutS1_ocp_ranges[] = {
90 REGULATOR_LINEAR_RANGE(70000, 0x01, 0x06, 0),
91 REGULATOR_LINEAR_RANGE(80000, 0x7, 0x1b, 10000),
92 REGULATOR_LINEAR_RANGE(280000, 0x1c, 0x3f, 0),
93 };
94
95 struct bd957x_regulator_data {
96 struct regulator_desc desc;
97 int base_voltage;
98 struct regulator_dev *rdev;
99 int ovd_notif;
100 int uvd_notif;
101 int temp_notif;
102 int ovd_err;
103 int uvd_err;
104 int temp_err;
105 const struct linear_range *xvd_ranges;
106 int num_xvd_ranges;
107 bool oc_supported;
108 unsigned int ovd_reg;
109 unsigned int uvd_reg;
110 unsigned int xvd_mask;
111 unsigned int ocp_reg;
112 unsigned int ocp_mask;
113 unsigned int ocw_reg;
114 unsigned int ocw_mask;
115 unsigned int ocw_rfet;
116 };
117
118 #define BD9576_NUM_REGULATORS 6
119 #define BD9576_NUM_OVD_REGULATORS 5
120
121 struct bd957x_data {
122 struct bd957x_regulator_data regulator_data[BD9576_NUM_REGULATORS];
123 struct regmap *regmap;
124 struct delayed_work therm_irq_suppress;
125 struct delayed_work ovd_irq_suppress;
126 struct delayed_work uvd_irq_suppress;
127 unsigned int therm_irq;
128 unsigned int ovd_irq;
129 unsigned int uvd_irq;
130 spinlock_t err_lock;
131 int regulator_global_err;
132 };
133
bd957x_vout34_list_voltage(struct regulator_dev * rdev,unsigned int selector)134 static int bd957x_vout34_list_voltage(struct regulator_dev *rdev,
135 unsigned int selector)
136 {
137 const struct regulator_desc *desc = rdev->desc;
138 int multiplier = selector & desc->vsel_mask & 0x7f;
139 int tune;
140
141 /* VOUT3 and 4 has 10mV step */
142 tune = multiplier * 10000;
143
144 if (!(selector & 0x80))
145 return desc->fixed_uV - tune;
146
147 return desc->fixed_uV + tune;
148 }
149
bd957x_list_voltage(struct regulator_dev * rdev,unsigned int selector)150 static int bd957x_list_voltage(struct regulator_dev *rdev,
151 unsigned int selector)
152 {
153 const struct regulator_desc *desc = rdev->desc;
154 int index = selector & desc->vsel_mask & 0x7f;
155
156 if (!(selector & 0x80))
157 index += desc->n_voltages/2;
158
159 if (index >= desc->n_voltages)
160 return -EINVAL;
161
162 return desc->volt_table[index];
163 }
164
bd9576_fill_ovd_flags(struct bd957x_regulator_data * data,bool warn)165 static void bd9576_fill_ovd_flags(struct bd957x_regulator_data *data,
166 bool warn)
167 {
168 if (warn) {
169 data->ovd_notif = REGULATOR_EVENT_OVER_VOLTAGE_WARN;
170 data->ovd_err = REGULATOR_ERROR_OVER_VOLTAGE_WARN;
171 } else {
172 data->ovd_notif = REGULATOR_EVENT_REGULATION_OUT;
173 data->ovd_err = REGULATOR_ERROR_REGULATION_OUT;
174 }
175 }
176
bd9576_fill_ocp_flags(struct bd957x_regulator_data * data,bool warn)177 static void bd9576_fill_ocp_flags(struct bd957x_regulator_data *data,
178 bool warn)
179 {
180 if (warn) {
181 data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT_WARN;
182 data->uvd_err = REGULATOR_ERROR_OVER_CURRENT_WARN;
183 } else {
184 data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT;
185 data->uvd_err = REGULATOR_ERROR_OVER_CURRENT;
186 }
187 }
188
bd9576_fill_uvd_flags(struct bd957x_regulator_data * data,bool warn)189 static void bd9576_fill_uvd_flags(struct bd957x_regulator_data *data,
190 bool warn)
191 {
192 if (warn) {
193 data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE_WARN;
194 data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE_WARN;
195 } else {
196 data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE;
197 data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE;
198 }
199 }
200
bd9576_fill_temp_flags(struct bd957x_regulator_data * data,bool enable,bool warn)201 static void bd9576_fill_temp_flags(struct bd957x_regulator_data *data,
202 bool enable, bool warn)
203 {
204 if (!enable) {
205 data->temp_notif = 0;
206 data->temp_err = 0;
207 } else if (warn) {
208 data->temp_notif = REGULATOR_EVENT_OVER_TEMP_WARN;
209 data->temp_err = REGULATOR_ERROR_OVER_TEMP_WARN;
210 } else {
211 data->temp_notif = REGULATOR_EVENT_OVER_TEMP;
212 data->temp_err = REGULATOR_ERROR_OVER_TEMP;
213 }
214 }
215
bd9576_set_limit(const struct linear_range * r,int num_ranges,struct regmap * regmap,int reg,int mask,int lim)216 static int bd9576_set_limit(const struct linear_range *r, int num_ranges,
217 struct regmap *regmap, int reg, int mask, int lim)
218 {
219 int ret;
220 bool found;
221 int sel = 0;
222
223 if (lim) {
224
225 ret = linear_range_get_selector_low_array(r, num_ranges,
226 lim, &sel, &found);
227 if (ret)
228 return ret;
229
230 if (!found)
231 dev_warn(regmap_get_device(regmap),
232 "limit %d out of range. Setting lower\n",
233 lim);
234 }
235
236 return regmap_update_bits(regmap, reg, mask, sel);
237 }
238
check_ocp_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)239 static bool check_ocp_flag_mismatch(struct regulator_dev *rdev, int severity,
240 struct bd957x_regulator_data *r)
241 {
242 if ((severity == REGULATOR_SEVERITY_ERR &&
243 r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT) ||
244 (severity == REGULATOR_SEVERITY_WARN &&
245 r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT_WARN)) {
246 dev_warn(rdev_get_dev(rdev),
247 "Can't support both OCP WARN and ERR\n");
248 /* Do not overwrite ERR config with WARN */
249 if (severity == REGULATOR_SEVERITY_WARN)
250 return true;
251
252 bd9576_fill_ocp_flags(r, 0);
253 }
254
255 return false;
256 }
257
check_uvd_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)258 static bool check_uvd_flag_mismatch(struct regulator_dev *rdev, int severity,
259 struct bd957x_regulator_data *r)
260 {
261 if ((severity == REGULATOR_SEVERITY_ERR &&
262 r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE) ||
263 (severity == REGULATOR_SEVERITY_WARN &&
264 r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE_WARN)) {
265 dev_warn(rdev_get_dev(rdev),
266 "Can't support both UVD WARN and ERR\n");
267 if (severity == REGULATOR_SEVERITY_WARN)
268 return true;
269
270 bd9576_fill_uvd_flags(r, 0);
271 }
272
273 return false;
274 }
275
check_ovd_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)276 static bool check_ovd_flag_mismatch(struct regulator_dev *rdev, int severity,
277 struct bd957x_regulator_data *r)
278 {
279 if ((severity == REGULATOR_SEVERITY_ERR &&
280 r->ovd_notif != REGULATOR_EVENT_REGULATION_OUT) ||
281 (severity == REGULATOR_SEVERITY_WARN &&
282 r->ovd_notif != REGULATOR_EVENT_OVER_VOLTAGE_WARN)) {
283 dev_warn(rdev_get_dev(rdev),
284 "Can't support both OVD WARN and ERR\n");
285 if (severity == REGULATOR_SEVERITY_WARN)
286 return true;
287
288 bd9576_fill_ovd_flags(r, 0);
289 }
290
291 return false;
292 }
293
check_temp_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)294 static bool check_temp_flag_mismatch(struct regulator_dev *rdev, int severity,
295 struct bd957x_regulator_data *r)
296 {
297 if ((severity == REGULATOR_SEVERITY_ERR &&
298 r->temp_notif != REGULATOR_EVENT_OVER_TEMP) ||
299 (severity == REGULATOR_SEVERITY_WARN &&
300 r->temp_notif != REGULATOR_EVENT_OVER_TEMP_WARN)) {
301 dev_warn(rdev_get_dev(rdev),
302 "Can't support both thermal WARN and ERR\n");
303 if (severity == REGULATOR_SEVERITY_WARN)
304 return true;
305 }
306
307 return false;
308 }
309
bd9576_set_ocp(struct regulator_dev * rdev,int lim_uA,int severity,bool enable)310 static int bd9576_set_ocp(struct regulator_dev *rdev, int lim_uA, int severity,
311 bool enable)
312 {
313 struct bd957x_data *d;
314 struct bd957x_regulator_data *r;
315 int reg, mask;
316 int Vfet, rfet;
317 const struct linear_range *range;
318 int num_ranges;
319
320 if ((lim_uA && !enable) || (!lim_uA && enable))
321 return -EINVAL;
322
323 r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
324 if (!r->oc_supported)
325 return -EINVAL;
326
327 d = rdev_get_drvdata(rdev);
328
329 if (severity == REGULATOR_SEVERITY_PROT) {
330 reg = r->ocp_reg;
331 mask = r->ocp_mask;
332 if (r->ocw_rfet) {
333 range = voutS1_ocp_ranges;
334 num_ranges = ARRAY_SIZE(voutS1_ocp_ranges);
335 rfet = r->ocw_rfet / 1000;
336 } else {
337 range = voutS1_ocp_ranges_internal;
338 num_ranges = ARRAY_SIZE(voutS1_ocp_ranges_internal);
339 /* Internal values are already micro-amperes */
340 rfet = 1000;
341 }
342 } else {
343 reg = r->ocw_reg;
344 mask = r->ocw_mask;
345
346 if (r->ocw_rfet) {
347 range = voutS1_ocw_ranges;
348 num_ranges = ARRAY_SIZE(voutS1_ocw_ranges);
349 rfet = r->ocw_rfet / 1000;
350 } else {
351 range = voutS1_ocw_ranges_internal;
352 num_ranges = ARRAY_SIZE(voutS1_ocw_ranges_internal);
353 /* Internal values are already micro-amperes */
354 rfet = 1000;
355 }
356
357 /* We abuse uvd fields for OCW on VoutS1 */
358 if (r->uvd_notif) {
359 /*
360 * If both warning and error are requested, prioritize
361 * ERROR configuration
362 */
363 if (check_ocp_flag_mismatch(rdev, severity, r))
364 return 0;
365 } else {
366 bool warn = severity == REGULATOR_SEVERITY_WARN;
367
368 bd9576_fill_ocp_flags(r, warn);
369 }
370 }
371
372 /*
373 * limits are given in uA, rfet is mOhm
374 * Divide lim_uA by 1000 to get Vfet in uV.
375 * (We expect both Rfet and limit uA to be magnitude of hundreds of
376 * milli Amperes & milli Ohms => we should still have decent accuracy)
377 */
378 Vfet = lim_uA/1000 * rfet;
379
380 return bd9576_set_limit(range, num_ranges, d->regmap,
381 reg, mask, Vfet);
382 }
383
bd9576_set_uvp(struct regulator_dev * rdev,int lim_uV,int severity,bool enable)384 static int bd9576_set_uvp(struct regulator_dev *rdev, int lim_uV, int severity,
385 bool enable)
386 {
387 struct bd957x_data *d;
388 struct bd957x_regulator_data *r;
389 int mask, reg;
390
391 if (severity == REGULATOR_SEVERITY_PROT) {
392 if (!enable || lim_uV)
393 return -EINVAL;
394 return 0;
395 }
396
397 /*
398 * BD9576 has enable control as a special value in limit reg. Can't
399 * set limit but keep feature disabled or enable W/O given limit.
400 */
401 if ((lim_uV && !enable) || (!lim_uV && enable))
402 return -EINVAL;
403
404 r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
405 d = rdev_get_drvdata(rdev);
406
407 mask = r->xvd_mask;
408 reg = r->uvd_reg;
409 /*
410 * Check that there is no mismatch for what the detection IRQs are to
411 * be used.
412 */
413 if (r->uvd_notif) {
414 if (check_uvd_flag_mismatch(rdev, severity, r))
415 return 0;
416 } else {
417 bd9576_fill_uvd_flags(r, severity == REGULATOR_SEVERITY_WARN);
418 }
419
420 return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap,
421 reg, mask, lim_uV);
422 }
423
bd9576_set_ovp(struct regulator_dev * rdev,int lim_uV,int severity,bool enable)424 static int bd9576_set_ovp(struct regulator_dev *rdev, int lim_uV, int severity,
425 bool enable)
426 {
427 struct bd957x_data *d;
428 struct bd957x_regulator_data *r;
429 int mask, reg;
430
431 if (severity == REGULATOR_SEVERITY_PROT) {
432 if (!enable || lim_uV)
433 return -EINVAL;
434 return 0;
435 }
436
437 /*
438 * BD9576 has enable control as a special value in limit reg. Can't
439 * set limit but keep feature disabled or enable W/O given limit.
440 */
441 if ((lim_uV && !enable) || (!lim_uV && enable))
442 return -EINVAL;
443
444 r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
445 d = rdev_get_drvdata(rdev);
446
447 mask = r->xvd_mask;
448 reg = r->ovd_reg;
449 /*
450 * Check that there is no mismatch for what the detection IRQs are to
451 * be used.
452 */
453 if (r->ovd_notif) {
454 if (check_ovd_flag_mismatch(rdev, severity, r))
455 return 0;
456 } else {
457 bd9576_fill_ovd_flags(r, severity == REGULATOR_SEVERITY_WARN);
458 }
459
460 return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap,
461 reg, mask, lim_uV);
462 }
463
464
bd9576_set_tw(struct regulator_dev * rdev,int lim,int severity,bool enable)465 static int bd9576_set_tw(struct regulator_dev *rdev, int lim, int severity,
466 bool enable)
467 {
468 struct bd957x_data *d;
469 struct bd957x_regulator_data *r;
470 int i;
471
472 /*
473 * BD9576MUF has fixed temperature limits
474 * The detection can only be enabled/disabled
475 */
476 if (lim)
477 return -EINVAL;
478
479 /* Protection can't be disabled */
480 if (severity == REGULATOR_SEVERITY_PROT) {
481 if (!enable)
482 return -EINVAL;
483 else
484 return 0;
485 }
486
487 r = container_of(rdev->desc, struct bd957x_regulator_data, desc);
488 d = rdev_get_drvdata(rdev);
489
490 /*
491 * Check that there is no mismatch for what the detection IRQs are to
492 * be used.
493 */
494 if (r->temp_notif)
495 if (check_temp_flag_mismatch(rdev, severity, r))
496 return 0;
497
498 bd9576_fill_temp_flags(r, enable, severity == REGULATOR_SEVERITY_WARN);
499
500 if (enable)
501 return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK,
502 BD9576_THERM_IRQ_MASK_TW, 0);
503
504 /*
505 * If any of the regulators is interested in thermal warning we keep IRQ
506 * enabled.
507 */
508 for (i = 0; i < BD9576_NUM_REGULATORS; i++)
509 if (d->regulator_data[i].temp_notif)
510 return 0;
511
512 return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK,
513 BD9576_THERM_IRQ_MASK_TW,
514 BD9576_THERM_IRQ_MASK_TW);
515 }
516
517 static const struct regulator_ops bd9573_vout34_ops = {
518 .is_enabled = regulator_is_enabled_regmap,
519 .list_voltage = bd957x_vout34_list_voltage,
520 .get_voltage_sel = regulator_get_voltage_sel_regmap,
521 };
522
523 static const struct regulator_ops bd9576_vout34_ops = {
524 .is_enabled = regulator_is_enabled_regmap,
525 .list_voltage = bd957x_vout34_list_voltage,
526 .get_voltage_sel = regulator_get_voltage_sel_regmap,
527 .set_over_voltage_protection = bd9576_set_ovp,
528 .set_under_voltage_protection = bd9576_set_uvp,
529 .set_thermal_protection = bd9576_set_tw,
530 };
531
532 static const struct regulator_ops bd9573_vouts1_regulator_ops = {
533 .is_enabled = regulator_is_enabled_regmap,
534 };
535
536 static const struct regulator_ops bd9576_vouts1_regulator_ops = {
537 .is_enabled = regulator_is_enabled_regmap,
538 .set_over_current_protection = bd9576_set_ocp,
539 };
540
541 static const struct regulator_ops bd9573_ops = {
542 .is_enabled = regulator_is_enabled_regmap,
543 .list_voltage = bd957x_list_voltage,
544 .get_voltage_sel = regulator_get_voltage_sel_regmap,
545 };
546
547 static const struct regulator_ops bd9576_ops = {
548 .is_enabled = regulator_is_enabled_regmap,
549 .list_voltage = bd957x_list_voltage,
550 .get_voltage_sel = regulator_get_voltage_sel_regmap,
551 .set_over_voltage_protection = bd9576_set_ovp,
552 .set_under_voltage_protection = bd9576_set_uvp,
553 .set_thermal_protection = bd9576_set_tw,
554 };
555
556 static const struct regulator_ops *bd9573_ops_arr[] = {
557 [BD957X_VD50] = &bd9573_ops,
558 [BD957X_VD18] = &bd9573_ops,
559 [BD957X_VDDDR] = &bd9573_vout34_ops,
560 [BD957X_VD10] = &bd9573_vout34_ops,
561 [BD957X_VOUTL1] = &bd9573_ops,
562 [BD957X_VOUTS1] = &bd9573_vouts1_regulator_ops,
563 };
564
565 static const struct regulator_ops *bd9576_ops_arr[] = {
566 [BD957X_VD50] = &bd9576_ops,
567 [BD957X_VD18] = &bd9576_ops,
568 [BD957X_VDDDR] = &bd9576_vout34_ops,
569 [BD957X_VD10] = &bd9576_vout34_ops,
570 [BD957X_VOUTL1] = &bd9576_ops,
571 [BD957X_VOUTS1] = &bd9576_vouts1_regulator_ops,
572 };
573
vouts1_get_fet_res(struct device_node * np,const struct regulator_desc * desc,struct regulator_config * cfg)574 static int vouts1_get_fet_res(struct device_node *np,
575 const struct regulator_desc *desc,
576 struct regulator_config *cfg)
577 {
578 struct bd957x_regulator_data *data;
579 int ret;
580 u32 uohms;
581
582 data = container_of(desc, struct bd957x_regulator_data, desc);
583
584 ret = of_property_read_u32(np, "rohm,ocw-fet-ron-micro-ohms", &uohms);
585 if (ret) {
586 if (ret != -EINVAL)
587 return ret;
588
589 return 0;
590 }
591 data->ocw_rfet = uohms;
592 return 0;
593 }
594
595 static struct bd957x_data bd957x_regulators = {
596 .regulator_data = {
597 {
598 .desc = {
599 .name = "VD50",
600 .of_match = of_match_ptr("regulator-vd50"),
601 .regulators_node = of_match_ptr("regulators"),
602 .id = BD957X_VD50,
603 .type = REGULATOR_VOLTAGE,
604 .volt_table = &vout1_volt_table[0],
605 .n_voltages = ARRAY_SIZE(vout1_volt_table),
606 .vsel_reg = BD957X_REG_VOUT1_TUNE,
607 .vsel_mask = BD957X_MASK_VOUT1_TUNE,
608 .enable_reg = BD957X_REG_POW_TRIGGER1,
609 .enable_mask = BD957X_REGULATOR_EN_MASK,
610 .enable_val = BD957X_REGULATOR_DIS_VAL,
611 .enable_is_inverted = true,
612 .owner = THIS_MODULE,
613 },
614 .xvd_ranges = vout1_xvd_ranges,
615 .num_xvd_ranges = ARRAY_SIZE(vout1_xvd_ranges),
616 .ovd_reg = BD9576_REG_VOUT1_OVD,
617 .uvd_reg = BD9576_REG_VOUT1_UVD,
618 .xvd_mask = BD9576_MASK_XVD,
619 },
620 {
621 .desc = {
622 .name = "VD18",
623 .of_match = of_match_ptr("regulator-vd18"),
624 .regulators_node = of_match_ptr("regulators"),
625 .id = BD957X_VD18,
626 .type = REGULATOR_VOLTAGE,
627 .volt_table = &vout2_volt_table[0],
628 .n_voltages = ARRAY_SIZE(vout2_volt_table),
629 .vsel_reg = BD957X_REG_VOUT2_TUNE,
630 .vsel_mask = BD957X_MASK_VOUT2_TUNE,
631 .enable_reg = BD957X_REG_POW_TRIGGER2,
632 .enable_mask = BD957X_REGULATOR_EN_MASK,
633 .enable_val = BD957X_REGULATOR_DIS_VAL,
634 .enable_is_inverted = true,
635 .owner = THIS_MODULE,
636 },
637 .xvd_ranges = vout234_xvd_ranges,
638 .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges),
639 .ovd_reg = BD9576_REG_VOUT2_OVD,
640 .uvd_reg = BD9576_REG_VOUT2_UVD,
641 .xvd_mask = BD9576_MASK_XVD,
642 },
643 {
644 .desc = {
645 .name = "VDDDR",
646 .of_match = of_match_ptr("regulator-vdddr"),
647 .regulators_node = of_match_ptr("regulators"),
648 .id = BD957X_VDDDR,
649 .type = REGULATOR_VOLTAGE,
650 .n_voltages = BD957X_VOUTS34_NUM_VOLT,
651 .vsel_reg = BD957X_REG_VOUT3_TUNE,
652 .vsel_mask = BD957X_MASK_VOUT3_TUNE,
653 .enable_reg = BD957X_REG_POW_TRIGGER3,
654 .enable_mask = BD957X_REGULATOR_EN_MASK,
655 .enable_val = BD957X_REGULATOR_DIS_VAL,
656 .enable_is_inverted = true,
657 .owner = THIS_MODULE,
658 },
659 .ovd_reg = BD9576_REG_VOUT3_OVD,
660 .uvd_reg = BD9576_REG_VOUT3_UVD,
661 .xvd_mask = BD9576_MASK_XVD,
662 .xvd_ranges = vout234_xvd_ranges,
663 .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges),
664 },
665 {
666 .desc = {
667 .name = "VD10",
668 .of_match = of_match_ptr("regulator-vd10"),
669 .regulators_node = of_match_ptr("regulators"),
670 .id = BD957X_VD10,
671 .type = REGULATOR_VOLTAGE,
672 .fixed_uV = BD957X_VOUTS4_BASE_VOLT,
673 .n_voltages = BD957X_VOUTS34_NUM_VOLT,
674 .vsel_reg = BD957X_REG_VOUT4_TUNE,
675 .vsel_mask = BD957X_MASK_VOUT4_TUNE,
676 .enable_reg = BD957X_REG_POW_TRIGGER4,
677 .enable_mask = BD957X_REGULATOR_EN_MASK,
678 .enable_val = BD957X_REGULATOR_DIS_VAL,
679 .enable_is_inverted = true,
680 .owner = THIS_MODULE,
681 },
682 .xvd_ranges = vout234_xvd_ranges,
683 .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges),
684 .ovd_reg = BD9576_REG_VOUT4_OVD,
685 .uvd_reg = BD9576_REG_VOUT4_UVD,
686 .xvd_mask = BD9576_MASK_XVD,
687 },
688 {
689 .desc = {
690 .name = "VOUTL1",
691 .of_match = of_match_ptr("regulator-voutl1"),
692 .regulators_node = of_match_ptr("regulators"),
693 .id = BD957X_VOUTL1,
694 .type = REGULATOR_VOLTAGE,
695 .volt_table = &voutl1_volt_table[0],
696 .n_voltages = ARRAY_SIZE(voutl1_volt_table),
697 .vsel_reg = BD957X_REG_VOUTL1_TUNE,
698 .vsel_mask = BD957X_MASK_VOUTL1_TUNE,
699 .enable_reg = BD957X_REG_POW_TRIGGERL1,
700 .enable_mask = BD957X_REGULATOR_EN_MASK,
701 .enable_val = BD957X_REGULATOR_DIS_VAL,
702 .enable_is_inverted = true,
703 .owner = THIS_MODULE,
704 },
705 .xvd_ranges = voutL1_xvd_ranges,
706 .num_xvd_ranges = ARRAY_SIZE(voutL1_xvd_ranges),
707 .ovd_reg = BD9576_REG_VOUTL1_OVD,
708 .uvd_reg = BD9576_REG_VOUTL1_UVD,
709 .xvd_mask = BD9576_MASK_XVD,
710 },
711 {
712 .desc = {
713 .name = "VOUTS1",
714 .of_match = of_match_ptr("regulator-vouts1"),
715 .regulators_node = of_match_ptr("regulators"),
716 .id = BD957X_VOUTS1,
717 .type = REGULATOR_VOLTAGE,
718 .n_voltages = 1,
719 .fixed_uV = BD957X_VOUTS1_VOLT,
720 .enable_reg = BD957X_REG_POW_TRIGGERS1,
721 .enable_mask = BD957X_REGULATOR_EN_MASK,
722 .enable_val = BD957X_REGULATOR_DIS_VAL,
723 .enable_is_inverted = true,
724 .owner = THIS_MODULE,
725 .of_parse_cb = vouts1_get_fet_res,
726 },
727 .oc_supported = true,
728 .ocw_reg = BD9576_REG_VOUT1S_OCW,
729 .ocw_mask = BD9576_MASK_VOUT1S_OCW,
730 .ocp_reg = BD9576_REG_VOUT1S_OCP,
731 .ocp_mask = BD9576_MASK_VOUT1S_OCP,
732 },
733 },
734 };
735
bd9576_renable(struct regulator_irq_data * rid,int reg,int mask)736 static int bd9576_renable(struct regulator_irq_data *rid, int reg, int mask)
737 {
738 int val, ret;
739 struct bd957x_data *d = (struct bd957x_data *)rid->data;
740
741 ret = regmap_read(d->regmap, reg, &val);
742 if (ret)
743 return REGULATOR_FAILED_RETRY;
744
745 if (rid->opaque && rid->opaque == (val & mask)) {
746 /*
747 * It seems we stil have same status. Ack and return
748 * information that we are still out of limits and core
749 * should not enable IRQ
750 */
751 regmap_write(d->regmap, reg, mask & val);
752 return REGULATOR_ERROR_ON;
753 }
754 rid->opaque = 0;
755 /*
756 * Status was changed. Either prolem was solved or we have new issues.
757 * Let's re-enable IRQs and be prepared to report problems again
758 */
759 return REGULATOR_ERROR_CLEARED;
760 }
761
bd9576_uvd_renable(struct regulator_irq_data * rid)762 static int bd9576_uvd_renable(struct regulator_irq_data *rid)
763 {
764 return bd9576_renable(rid, BD957X_REG_INT_UVD_STAT, UVD_IRQ_VALID_MASK);
765 }
766
bd9576_ovd_renable(struct regulator_irq_data * rid)767 static int bd9576_ovd_renable(struct regulator_irq_data *rid)
768 {
769 return bd9576_renable(rid, BD957X_REG_INT_OVD_STAT, OVD_IRQ_VALID_MASK);
770 }
771
bd9576_temp_renable(struct regulator_irq_data * rid)772 static int bd9576_temp_renable(struct regulator_irq_data *rid)
773 {
774 return bd9576_renable(rid, BD957X_REG_INT_THERM_STAT,
775 BD9576_THERM_IRQ_MASK_TW);
776 }
777
bd9576_uvd_handler(int irq,struct regulator_irq_data * rid,unsigned long * dev_mask)778 static int bd9576_uvd_handler(int irq, struct regulator_irq_data *rid,
779 unsigned long *dev_mask)
780 {
781 int val, ret, i;
782 struct bd957x_data *d = (struct bd957x_data *)rid->data;
783
784 ret = regmap_read(d->regmap, BD957X_REG_INT_UVD_STAT, &val);
785 if (ret)
786 return REGULATOR_FAILED_RETRY;
787
788 *dev_mask = 0;
789
790 rid->opaque = val & UVD_IRQ_VALID_MASK;
791
792 /*
793 * Go through the set status bits and report either error or warning
794 * to the notifier depending on what was flagged in DT
795 */
796 *dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4;
797 /* There is 1 bit gap in register after Vout1 .. Vout4 statuses */
798 *dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1);
799 /*
800 * We (ab)use the uvd for OCW notification. DT parsing should
801 * have added correct OCW flag to uvd_notif and uvd_err for S1
802 */
803 *dev_mask |= ((val & BD9576_UVD_IRQ_MASK_VOUTS1_OCW) >> 1);
804
805 for_each_set_bit(i, dev_mask, 6) {
806 struct bd957x_regulator_data *rdata;
807 struct regulator_err_state *stat;
808
809 rdata = &d->regulator_data[i];
810 stat = &rid->states[i];
811
812 stat->notifs = rdata->uvd_notif;
813 stat->errors = rdata->uvd_err;
814 }
815
816 ret = regmap_write(d->regmap, BD957X_REG_INT_UVD_STAT,
817 UVD_IRQ_VALID_MASK & val);
818
819 return 0;
820 }
821
bd9576_ovd_handler(int irq,struct regulator_irq_data * rid,unsigned long * dev_mask)822 static int bd9576_ovd_handler(int irq, struct regulator_irq_data *rid,
823 unsigned long *dev_mask)
824 {
825 int val, ret, i;
826 struct bd957x_data *d = (struct bd957x_data *)rid->data;
827
828 ret = regmap_read(d->regmap, BD957X_REG_INT_OVD_STAT, &val);
829 if (ret)
830 return REGULATOR_FAILED_RETRY;
831
832 rid->opaque = val & OVD_IRQ_VALID_MASK;
833 *dev_mask = 0;
834
835 if (!(val & OVD_IRQ_VALID_MASK))
836 return 0;
837
838 *dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4;
839 /* There is 1 bit gap in register after Vout1 .. Vout4 statuses */
840 *dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1);
841
842 for_each_set_bit(i, dev_mask, 5) {
843 struct bd957x_regulator_data *rdata;
844 struct regulator_err_state *stat;
845
846 rdata = &d->regulator_data[i];
847 stat = &rid->states[i];
848
849 stat->notifs = rdata->ovd_notif;
850 stat->errors = rdata->ovd_err;
851 }
852
853 /* Clear the sub-IRQ status */
854 regmap_write(d->regmap, BD957X_REG_INT_OVD_STAT,
855 OVD_IRQ_VALID_MASK & val);
856
857 return 0;
858 }
859
860 #define BD9576_DEV_MASK_ALL_REGULATORS 0x3F
861
bd9576_thermal_handler(int irq,struct regulator_irq_data * rid,unsigned long * dev_mask)862 static int bd9576_thermal_handler(int irq, struct regulator_irq_data *rid,
863 unsigned long *dev_mask)
864 {
865 int val, ret, i;
866 struct bd957x_data *d = (struct bd957x_data *)rid->data;
867
868 ret = regmap_read(d->regmap, BD957X_REG_INT_THERM_STAT, &val);
869 if (ret)
870 return REGULATOR_FAILED_RETRY;
871
872 if (!(val & BD9576_THERM_IRQ_MASK_TW)) {
873 *dev_mask = 0;
874 return 0;
875 }
876
877 *dev_mask = BD9576_DEV_MASK_ALL_REGULATORS;
878
879 for (i = 0; i < BD9576_NUM_REGULATORS; i++) {
880 struct bd957x_regulator_data *rdata;
881 struct regulator_err_state *stat;
882
883 rdata = &d->regulator_data[i];
884 stat = &rid->states[i];
885
886 stat->notifs = rdata->temp_notif;
887 stat->errors = rdata->temp_err;
888 }
889
890 /* Clear the sub-IRQ status */
891 regmap_write(d->regmap, BD957X_REG_INT_THERM_STAT,
892 BD9576_THERM_IRQ_MASK_TW);
893
894 return 0;
895 }
896
bd957x_probe(struct platform_device * pdev)897 static int bd957x_probe(struct platform_device *pdev)
898 {
899 int i;
900 unsigned int num_reg_data;
901 bool vout_mode, ddr_sel, may_have_irqs = false;
902 struct regmap *regmap;
903 struct bd957x_data *ic_data;
904 struct regulator_config config = { 0 };
905 /* All regulators are related to UVD and thermal IRQs... */
906 struct regulator_dev *rdevs[BD9576_NUM_REGULATORS];
907 /* ...But VoutS1 is not flagged by OVD IRQ */
908 struct regulator_dev *ovd_devs[BD9576_NUM_OVD_REGULATORS];
909 static const struct regulator_irq_desc bd9576_notif_uvd = {
910 .name = "bd9576-uvd",
911 .irq_off_ms = 1000,
912 .map_event = bd9576_uvd_handler,
913 .renable = bd9576_uvd_renable,
914 .data = &bd957x_regulators,
915 };
916 static const struct regulator_irq_desc bd9576_notif_ovd = {
917 .name = "bd9576-ovd",
918 .irq_off_ms = 1000,
919 .map_event = bd9576_ovd_handler,
920 .renable = bd9576_ovd_renable,
921 .data = &bd957x_regulators,
922 };
923 static const struct regulator_irq_desc bd9576_notif_temp = {
924 .name = "bd9576-temp",
925 .irq_off_ms = 1000,
926 .map_event = bd9576_thermal_handler,
927 .renable = bd9576_temp_renable,
928 .data = &bd957x_regulators,
929 };
930 enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
931
932 num_reg_data = ARRAY_SIZE(bd957x_regulators.regulator_data);
933
934 ic_data = &bd957x_regulators;
935
936 regmap = dev_get_regmap(pdev->dev.parent, NULL);
937 if (!regmap) {
938 dev_err(&pdev->dev, "No regmap\n");
939 return -EINVAL;
940 }
941
942 ic_data->regmap = regmap;
943 vout_mode = device_property_read_bool(pdev->dev.parent,
944 "rohm,vout1-en-low");
945 if (vout_mode) {
946 struct gpio_desc *en;
947
948 dev_dbg(&pdev->dev, "GPIO controlled mode\n");
949
950 /* VOUT1 enable state judged by VOUT1_EN pin */
951 /* See if we have GPIO defined */
952 en = devm_fwnode_gpiod_get(&pdev->dev,
953 dev_fwnode(pdev->dev.parent),
954 "rohm,vout1-en", GPIOD_OUT_LOW,
955 "vout1-en");
956
957 /* VOUT1_OPS gpio ctrl */
958 /*
959 * Regulator core prioritizes the ena_gpio over
960 * enable/disable/is_enabled callbacks so no need to clear them
961 * even if GPIO is used. So, we can still use same ops.
962 *
963 * In theory it is possible someone wants to set vout1-en LOW
964 * during OTP loading and set VOUT1 to be controlled by GPIO -
965 * but control the GPIO from some where else than this driver.
966 * For that to work we should unset the is_enabled callback
967 * here.
968 *
969 * I believe such case where rohm,vout1-en-low is set and
970 * vout1-en-gpios is not is likely to be a misconfiguration.
971 * So let's just err out for now.
972 */
973 if (!IS_ERR(en))
974 config.ena_gpiod = en;
975 else
976 return dev_err_probe(&pdev->dev, PTR_ERR(en),
977 "Failed to get VOUT1 control GPIO\n");
978 }
979
980 /*
981 * If more than one PMIC needs to be controlled by same processor then
982 * allocate the regulator data array here and use bd9576_regulators as
983 * template. At the moment I see no such use-case so I spare some
984 * bytes and use bd9576_regulators directly for non-constant configs
985 * like DDR voltage selection.
986 */
987 platform_set_drvdata(pdev, ic_data);
988 ddr_sel = device_property_read_bool(pdev->dev.parent,
989 "rohm,ddr-sel-low");
990 if (ddr_sel)
991 ic_data->regulator_data[2].desc.fixed_uV = 1350000;
992 else
993 ic_data->regulator_data[2].desc.fixed_uV = 1500000;
994
995 switch (chip) {
996 case ROHM_CHIP_TYPE_BD9576:
997 may_have_irqs = true;
998 dev_dbg(&pdev->dev, "Found BD9576MUF\n");
999 break;
1000 case ROHM_CHIP_TYPE_BD9573:
1001 dev_dbg(&pdev->dev, "Found BD9573MUF\n");
1002 break;
1003 default:
1004 dev_err(&pdev->dev, "Unsupported chip type\n");
1005 return -EINVAL;
1006 }
1007
1008 for (i = 0; i < num_reg_data; i++) {
1009 struct regulator_desc *d;
1010
1011 d = &ic_data->regulator_data[i].desc;
1012
1013
1014 if (may_have_irqs) {
1015 if (d->id >= ARRAY_SIZE(bd9576_ops_arr))
1016 return -EINVAL;
1017
1018 d->ops = bd9576_ops_arr[d->id];
1019 } else {
1020 if (d->id >= ARRAY_SIZE(bd9573_ops_arr))
1021 return -EINVAL;
1022
1023 d->ops = bd9573_ops_arr[d->id];
1024 }
1025 }
1026
1027 config.dev = pdev->dev.parent;
1028 config.regmap = regmap;
1029 config.driver_data = ic_data;
1030
1031 for (i = 0; i < num_reg_data; i++) {
1032
1033 struct bd957x_regulator_data *r = &ic_data->regulator_data[i];
1034 const struct regulator_desc *desc = &r->desc;
1035
1036 r->rdev = devm_regulator_register(&pdev->dev, desc,
1037 &config);
1038 if (IS_ERR(r->rdev))
1039 return dev_err_probe(&pdev->dev, PTR_ERR(r->rdev),
1040 "failed to register %s regulator\n",
1041 desc->name);
1042 /*
1043 * Clear the VOUT1 GPIO setting - rest of the regulators do not
1044 * support GPIO control
1045 */
1046 config.ena_gpiod = NULL;
1047
1048 if (!may_have_irqs)
1049 continue;
1050
1051 rdevs[i] = r->rdev;
1052 if (i < BD957X_VOUTS1)
1053 ovd_devs[i] = r->rdev;
1054 }
1055 if (may_have_irqs) {
1056 void *ret;
1057 /*
1058 * We can add both the possible error and warning flags here
1059 * because the core uses these only for status clearing and
1060 * if we use warnings - errors are always clear and the other
1061 * way around. We can also add CURRENT flag for all regulators
1062 * because it is never set if it is not supported. Same applies
1063 * to setting UVD for VoutS1 - it is not accidentally cleared
1064 * as it is never set.
1065 */
1066 int uvd_errs = REGULATOR_ERROR_UNDER_VOLTAGE |
1067 REGULATOR_ERROR_UNDER_VOLTAGE_WARN |
1068 REGULATOR_ERROR_OVER_CURRENT |
1069 REGULATOR_ERROR_OVER_CURRENT_WARN;
1070 int ovd_errs = REGULATOR_ERROR_OVER_VOLTAGE_WARN |
1071 REGULATOR_ERROR_REGULATION_OUT;
1072 int temp_errs = REGULATOR_ERROR_OVER_TEMP |
1073 REGULATOR_ERROR_OVER_TEMP_WARN;
1074 int irq;
1075
1076 irq = platform_get_irq_byname(pdev, "bd9576-uvd");
1077
1078 /* Register notifiers - can fail if IRQ is not given */
1079 ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_uvd,
1080 irq, 0, uvd_errs, NULL,
1081 &rdevs[0],
1082 BD9576_NUM_REGULATORS);
1083 if (IS_ERR(ret)) {
1084 if (PTR_ERR(ret) == -EPROBE_DEFER)
1085 return -EPROBE_DEFER;
1086
1087 dev_warn(&pdev->dev, "UVD disabled %pe\n", ret);
1088 }
1089
1090 irq = platform_get_irq_byname(pdev, "bd9576-ovd");
1091
1092 ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_ovd,
1093 irq, 0, ovd_errs, NULL,
1094 &ovd_devs[0],
1095 BD9576_NUM_OVD_REGULATORS);
1096 if (IS_ERR(ret)) {
1097 if (PTR_ERR(ret) == -EPROBE_DEFER)
1098 return -EPROBE_DEFER;
1099
1100 dev_warn(&pdev->dev, "OVD disabled %pe\n", ret);
1101 }
1102 irq = platform_get_irq_byname(pdev, "bd9576-temp");
1103
1104 ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_temp,
1105 irq, 0, temp_errs, NULL,
1106 &rdevs[0],
1107 BD9576_NUM_REGULATORS);
1108 if (IS_ERR(ret)) {
1109 if (PTR_ERR(ret) == -EPROBE_DEFER)
1110 return -EPROBE_DEFER;
1111
1112 dev_warn(&pdev->dev, "Thermal warning disabled %pe\n",
1113 ret);
1114 }
1115 }
1116 return 0;
1117 }
1118
1119 static const struct platform_device_id bd957x_pmic_id[] = {
1120 { "bd9573-regulator", ROHM_CHIP_TYPE_BD9573 },
1121 { "bd9576-regulator", ROHM_CHIP_TYPE_BD9576 },
1122 { },
1123 };
1124 MODULE_DEVICE_TABLE(platform, bd957x_pmic_id);
1125
1126 static struct platform_driver bd957x_regulator = {
1127 .driver = {
1128 .name = "bd957x-pmic",
1129 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1130 },
1131 .probe = bd957x_probe,
1132 .id_table = bd957x_pmic_id,
1133 };
1134
1135 module_platform_driver(bd957x_regulator);
1136
1137 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
1138 MODULE_DESCRIPTION("ROHM BD9576/BD9573 voltage regulator driver");
1139 MODULE_LICENSE("GPL");
1140 MODULE_ALIAS("platform:bd957x-pmic");
1141