?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
WIP FPC-III support
[linux/fpc-iii.git] / drivers / regulator / da9121-regulator.c
bloba2ede7d7897eb1a5059ae1978cc45c2e84f119ed
1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // DA9121 Single-channel dual-phase 10A buck converter
4 //
5 // Copyright (C) 2020 Axis Communications AB
6 //
7 // DA9130 Single-channel dual-phase 10A buck converter (Automotive)
8 // DA9217 Single-channel dual-phase 6A buck converter
9 // DA9122 Dual-channel single-phase 5A buck converter
10 // DA9131 Dual-channel single-phase 5A buck converter (Automotive)
11 // DA9220 Dual-channel single-phase 3A buck converter
12 // DA9132 Dual-channel single-phase 3A buck converter (Automotive)
13 //
14 // Copyright (C) 2020 Dialog Semiconductor
15
16 #include <linux/of_device.h>
17 #include <linux/of_gpio.h>
18 #include <linux/gpio/consumer.h>
19 #include <linux/regulator/of_regulator.h>
20 #include <linux/regulator/machine.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/module.h>
23 #include <linux/regmap.h>
24 #include <linux/err.h>
25 #include <linux/i2c.h>
26 #include <linux/regulator/da9121.h>
27 #include <linux/interrupt.h>
28 #include <linux/workqueue.h>
29
30 #include "da9121-regulator.h"
31
32 /* Chip data */
33 struct da9121 {
34 struct device *dev;
35 struct delayed_work work;
36 struct da9121_pdata *pdata;
37 struct regmap *regmap;
38 struct regulator_dev *rdev[DA9121_IDX_MAX];
39 unsigned int persistent[2];
40 unsigned int passive_delay;
41 int chip_irq;
42 int variant_id;
43 };
44
45 /* Define ranges for different variants, enabling translation to/from
46 * registers. Maximums give scope to allow for transients.
47 */
48 struct da9121_range {
49 int val_min;
50 int val_max;
51 int val_stp;
52 int reg_min;
53 int reg_max;
54 };
55
56 static struct da9121_range da9121_10A_2phase_current = {
57 .val_min = 7000000,
58 .val_max = 20000000,
59 .val_stp = 1000000,
60 .reg_min = 1,
61 .reg_max = 14,
62 };
63
64 static struct da9121_range da9121_6A_2phase_current = {
65 .val_min = 7000000,
66 .val_max = 12000000,
67 .val_stp = 1000000,
68 .reg_min = 1,
69 .reg_max = 6,
70 };
71
72 static struct da9121_range da9121_5A_1phase_current = {
73 .val_min = 3500000,
74 .val_max = 10000000,
75 .val_stp = 500000,
76 .reg_min = 1,
77 .reg_max = 14,
78 };
79
80 static struct da9121_range da9121_3A_1phase_current = {
81 .val_min = 3500000,
82 .val_max = 6000000,
83 .val_stp = 500000,
84 .reg_min = 1,
85 .reg_max = 6,
86 };
87
88 struct da9121_variant_info {
89 int num_bucks;
90 int num_phases;
91 struct da9121_range *current_range;
92 };
93
94 static const struct da9121_variant_info variant_parameters[] = {
95 { 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130
96 { 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132
97 { 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131
98 { 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217
99 };
100
101 struct da9121_field {
102 unsigned int reg;
103 unsigned int msk;
104 };
105
106 static const struct da9121_field da9121_current_field[2] = {
107 { DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
108 { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
109 };
110
111 static const struct da9121_field da9121_mode_field[2] = {
112 { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
113 { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
114 };
115
116 struct status_event_data {
117 int buck_id; /* 0=core, 1/2-buck */
118 int reg_index; /* index for status/event/mask register selection */
119 int status_bit; /* bit masks... */
120 int event_bit;
121 int mask_bit;
122 unsigned long notification; /* Notification for status inception */
123 char *warn; /* if NULL, notify - otherwise dev_warn this string */
124 };
125
126 #define DA9121_STATUS(id, bank, name, notification, warning) \
127 { id, bank, \
128 DA9121_MASK_SYS_STATUS_##bank##_##name, \
129 DA9121_MASK_SYS_EVENT_##bank##_E_##name, \
130 DA9121_MASK_SYS_MASK_##bank##_M_##name, \
131 notification, warning }
132
133 /* For second buck related event bits that are specific to DA9122, DA9220 variants */
134 #define DA9xxx_STATUS(id, bank, name, notification, warning) \
135 { id, bank, \
136 DA9xxx_MASK_SYS_STATUS_##bank##_##name, \
137 DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \
138 DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \
139 notification, warning }
140
141 /* The status signals that may need servicing, depending on device variant.
142 * After assertion, they persist; so event is notified, the IRQ disabled,
143 * and status polled until clear again and IRQ is reenabled.
144 *
145 * SG/PG1/PG2 should be set when device first powers up and should never
146 * re-occur. When this driver starts, it is expected that these will have
147 * self-cleared for when the IRQs are enabled, so these should never be seen.
148 * If seen, the implication is that the device has reset.
149 *
150 * GPIO0/1/2 are not configured for use by default, so should not be seen.
151 */
152 static const struct status_event_data status_event_handling[] = {
153 DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"),
154 DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL),
155 DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL),
156 DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"),
157 DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL),
158 DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
159 DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL),
160 DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"),
161 DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL),
162 DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
163 DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL),
164 DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"),
165 DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"),
166 DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"),
167 };
168
169 static int da9121_get_current_limit(struct regulator_dev *rdev)
170 {
171 struct da9121 *chip = rdev_get_drvdata(rdev);
172 int id = rdev_get_id(rdev);
173 struct da9121_range *range =
174 variant_parameters[chip->variant_id].current_range;
175 unsigned int val = 0;
176 int ret = 0;
177
178 ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val);
179 if (ret < 0) {
180 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
181 goto error;
182 }
183
184 if (val < range->reg_min) {
185 ret = -EACCES;
186 goto error;
187 }
188
189 if (val > range->reg_max) {
190 ret = -EINVAL;
191 goto error;
192 }
193
194 return range->val_min + (range->val_stp * (val - range->reg_min));
195 error:
196 return ret;
197 }
198
199 static int da9121_ceiling_selector(struct regulator_dev *rdev,
200 int min, int max,
201 unsigned int *selector)
202 {
203 struct da9121 *chip = rdev_get_drvdata(rdev);
204 struct da9121_range *range =
205 variant_parameters[chip->variant_id].current_range;
206 unsigned int level;
207 unsigned int i = 0;
208 unsigned int sel = 0;
209 int ret = 0;
210
211 if (range->val_min > max || range->val_max < min) {
212 dev_err(chip->dev,
213 "Requested current out of regulator capability\n");
214 ret = -EINVAL;
215 goto error;
216 }
217
218 level = range->val_max;
219 for (i = range->reg_max; i >= range->reg_min; i--) {
220 if (level <= max) {
221 sel = i;
222 break;
223 }
224 level -= range->val_stp;
225 }
226
227 if (level < min) {
228 dev_err(chip->dev,
229 "Best match falls below minimum requested current\n");
230 ret = -EINVAL;
231 goto error;
232 }
233
234 *selector = sel;
235 error:
236 return ret;
237 }
238
239 static int da9121_set_current_limit(struct regulator_dev *rdev,
240 int min_ua, int max_ua)
241 {
242 struct da9121 *chip = rdev_get_drvdata(rdev);
243 int id = rdev_get_id(rdev);
244 struct da9121_range *range =
245 variant_parameters[chip->variant_id].current_range;
246 unsigned int sel = 0;
247 int ret = 0;
248
249 if (min_ua < range->val_min ||
250 max_ua > range->val_max) {
251 ret = -EINVAL;
252 goto error;
253 }
254
255 ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
256 if (ret < 0)
257 goto error;
258
259 ret = regmap_update_bits(chip->regmap,
260 da9121_current_field[id].reg,
261 da9121_current_field[id].msk,
262 (unsigned int)sel);
263 if (ret < 0)
264 dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret);
265
266 error:
267 return ret;
268 }
269
270 static unsigned int da9121_map_mode(unsigned int mode)
271 {
272 switch (mode) {
273 case DA9121_BUCK_MODE_FORCE_PWM:
274 return REGULATOR_MODE_FAST;
275 case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
276 return REGULATOR_MODE_NORMAL;
277 case DA9121_BUCK_MODE_AUTO:
278 return REGULATOR_MODE_IDLE;
279 case DA9121_BUCK_MODE_FORCE_PFM:
280 return REGULATOR_MODE_STANDBY;
281 default:
282 return -EINVAL;
283 }
284 }
285
286 static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
287 {
288 struct da9121 *chip = rdev_get_drvdata(rdev);
289 int id = rdev_get_id(rdev);
290 unsigned int val;
291
292 switch (mode) {
293 case REGULATOR_MODE_FAST:
294 val = DA9121_BUCK_MODE_FORCE_PWM;
295 break;
296 case REGULATOR_MODE_NORMAL:
297 val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
298 break;
299 case REGULATOR_MODE_IDLE:
300 val = DA9121_BUCK_MODE_AUTO;
301 break;
302 case REGULATOR_MODE_STANDBY:
303 val = DA9121_BUCK_MODE_FORCE_PFM;
304 break;
305 default:
306 return -EINVAL;
307 }
308
309 return regmap_update_bits(chip->regmap,
310 da9121_mode_field[id].reg,
311 da9121_mode_field[id].msk,
312 val);
313 }
314
315 static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
316 {
317 struct da9121 *chip = rdev_get_drvdata(rdev);
318 int id = rdev_get_id(rdev);
319 unsigned int val;
320 int ret = 0;
321
322 ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
323 if (ret < 0) {
324 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
325 return -EINVAL;
326 }
327
328 return da9121_map_mode(val & da9121_mode_field[id].msk);
329 }
330
331 static const struct regulator_ops da9121_buck_ops = {
332 .enable = regulator_enable_regmap,
333 .disable = regulator_disable_regmap,
334 .is_enabled = regulator_is_enabled_regmap,
335 .set_voltage_sel = regulator_set_voltage_sel_regmap,
336 .get_voltage_sel = regulator_get_voltage_sel_regmap,
337 .list_voltage = regulator_list_voltage_linear,
338 .get_current_limit = da9121_get_current_limit,
339 .set_current_limit = da9121_set_current_limit,
340 .set_mode = da9121_buck_set_mode,
341 .get_mode = da9121_buck_get_mode,
342 };
343
344 static struct of_regulator_match da9121_matches[] = {
345 [DA9121_IDX_BUCK1] = { .name = "buck1" },
346 [DA9121_IDX_BUCK2] = { .name = "buck2" },
347 };
348
349 static int da9121_of_parse_cb(struct device_node *np,
350 const struct regulator_desc *desc,
351 struct regulator_config *config)
352 {
353 struct da9121 *chip = config->driver_data;
354 struct da9121_pdata *pdata;
355 struct gpio_desc *ena_gpiod;
356
357 if (chip->pdata == NULL) {
358 pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
359 if (!pdata)
360 return -ENOMEM;
361 } else {
362 pdata = chip->pdata;
363 }
364
365 pdata->num_buck++;
366
367 if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
368 dev_err(chip->dev, "Error: excessive regulators for device\n");
369 return -ENODEV;
370 }
371
372 ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
373 GPIOD_OUT_HIGH |
374 GPIOD_FLAGS_BIT_NONEXCLUSIVE,
375 "da9121-enable");
376 if (!IS_ERR(ena_gpiod))
377 config->ena_gpiod = ena_gpiod;
378
379 if (variant_parameters[chip->variant_id].num_bucks == 2) {
380 uint32_t ripple_cancel;
381 uint32_t ripple_reg;
382 int ret;
383
384 if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node,
385 "dlg,ripple-cancel", &ripple_cancel)) {
386 if (pdata->num_buck > 1)
387 ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
388 else
389 ripple_reg = DA9121_REG_BUCK_BUCK1_7;
390
391 ret = regmap_update_bits(chip->regmap, ripple_reg,
392 DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
393 ripple_cancel);
394 if (ret < 0)
395 dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
396 }
397 }
398
399 return 0;
400 }
401
402 #define DA9121_MIN_MV 300
403 #define DA9121_MAX_MV 1900
404 #define DA9121_STEP_MV 10
405 #define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
406 #define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
407 + 1 + DA9121_MIN_SEL)
408
409 static const struct regulator_desc da9121_reg = {
410 .id = DA9121_IDX_BUCK1,
411 .name = "da9121",
412 .of_match = "buck1",
413 .of_parse_cb = da9121_of_parse_cb,
414 .owner = THIS_MODULE,
415 .regulators_node = of_match_ptr("regulators"),
416 .of_map_mode = da9121_map_mode,
417 .ops = &da9121_buck_ops,
418 .type = REGULATOR_VOLTAGE,
419 .n_voltages = DA9121_N_VOLTAGES,
420 .min_uV = DA9121_MIN_MV * 1000,
421 .uV_step = DA9121_STEP_MV * 1000,
422 .linear_min_sel = DA9121_MIN_SEL,
423 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
424 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
425 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
426 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
427 /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
428 .ramp_delay = 20000,
429 /* tBUCK_EN */
430 .enable_time = 20,
431 };
432
433 static const struct regulator_desc da9220_reg[2] = {
434 {
435 .id = DA9121_IDX_BUCK1,
436 .name = "DA9220/DA9132 BUCK1",
437 .of_match = "buck1",
438 .of_parse_cb = da9121_of_parse_cb,
439 .owner = THIS_MODULE,
440 .regulators_node = of_match_ptr("regulators"),
441 .of_map_mode = da9121_map_mode,
442 .ops = &da9121_buck_ops,
443 .type = REGULATOR_VOLTAGE,
444 .n_voltages = DA9121_N_VOLTAGES,
445 .min_uV = DA9121_MIN_MV * 1000,
446 .uV_step = DA9121_STEP_MV * 1000,
447 .linear_min_sel = DA9121_MIN_SEL,
448 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
449 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
450 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
451 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
452 },
453 {
454 .id = DA9121_IDX_BUCK2,
455 .name = "DA9220/DA9132 BUCK2",
456 .of_match = "buck2",
457 .of_parse_cb = da9121_of_parse_cb,
458 .owner = THIS_MODULE,
459 .regulators_node = of_match_ptr("regulators"),
460 .of_map_mode = da9121_map_mode,
461 .ops = &da9121_buck_ops,
462 .type = REGULATOR_VOLTAGE,
463 .n_voltages = DA9121_N_VOLTAGES,
464 .min_uV = DA9121_MIN_MV * 1000,
465 .uV_step = DA9121_STEP_MV * 1000,
466 .linear_min_sel = DA9121_MIN_SEL,
467 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
468 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
469 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
470 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
471 }
472 };
473
474 static const struct regulator_desc da9122_reg[2] = {
475 {
476 .id = DA9121_IDX_BUCK1,
477 .name = "DA9122/DA9131 BUCK1",
478 .of_match = "buck1",
479 .of_parse_cb = da9121_of_parse_cb,
480 .owner = THIS_MODULE,
481 .regulators_node = of_match_ptr("regulators"),
482 .of_map_mode = da9121_map_mode,
483 .ops = &da9121_buck_ops,
484 .type = REGULATOR_VOLTAGE,
485 .n_voltages = DA9121_N_VOLTAGES,
486 .min_uV = DA9121_MIN_MV * 1000,
487 .uV_step = DA9121_STEP_MV * 1000,
488 .linear_min_sel = DA9121_MIN_SEL,
489 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
490 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
491 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
492 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
493 },
494 {
495 .id = DA9121_IDX_BUCK2,
496 .name = "DA9122/DA9131 BUCK2",
497 .of_match = "buck2",
498 .of_parse_cb = da9121_of_parse_cb,
499 .owner = THIS_MODULE,
500 .regulators_node = of_match_ptr("regulators"),
501 .of_map_mode = da9121_map_mode,
502 .ops = &da9121_buck_ops,
503 .type = REGULATOR_VOLTAGE,
504 .n_voltages = DA9121_N_VOLTAGES,
505 .min_uV = DA9121_MIN_MV * 1000,
506 .uV_step = DA9121_STEP_MV * 1000,
507 .linear_min_sel = DA9121_MIN_SEL,
508 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
509 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
510 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
511 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
512 }
513 };
514
515 static const struct regulator_desc da9217_reg = {
516 .id = DA9121_IDX_BUCK1,
517 .name = "DA9217 BUCK1",
518 .of_match = "buck1",
519 .of_parse_cb = da9121_of_parse_cb,
520 .owner = THIS_MODULE,
521 .regulators_node = of_match_ptr("regulators"),
522 .of_map_mode = da9121_map_mode,
523 .ops = &da9121_buck_ops,
524 .type = REGULATOR_VOLTAGE,
525 .n_voltages = DA9121_N_VOLTAGES,
526 .min_uV = DA9121_MIN_MV * 1000,
527 .uV_step = DA9121_STEP_MV * 1000,
528 .linear_min_sel = DA9121_MIN_SEL,
529 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
530 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
531 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
532 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
533 };
534
535 static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
536 [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
537 [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
538 [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
539 [DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
540 };
541
542 static void da9121_status_poll_on(struct work_struct *work)
543 {
544 struct da9121 *chip = container_of(work, struct da9121, work.work);
545 int status[3] = {0};
546 int clear[3] = {0};
547 unsigned long delay;
548 int i;
549 int ret;
550
551 ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2);
552 if (ret < 0) {
553 dev_err(chip->dev,
554 "Failed to read STATUS registers: %d\n", ret);
555 goto error;
556 }
557
558 /* Possible events are tested to be within range for the variant, potentially
559 * masked by the IRQ handler (not just warned about), as having been masked,
560 * and the respective state cleared - then flagged to unmask for next IRQ.
561 */
562 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
563 const struct status_event_data *item = &status_event_handling[i];
564 int reg_idx = item->reg_index;
565 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
566 bool supported = (item->warn == NULL);
567 bool persisting = (chip->persistent[reg_idx] & item->event_bit);
568 bool now_cleared = !(status[reg_idx] & item->status_bit);
569
570 if (relevant && supported && persisting && now_cleared) {
571 clear[reg_idx] |= item->mask_bit;
572 chip->persistent[reg_idx] &= ~item->event_bit;
573 }
574 }
575
576 for (i = 0; i < 2; i++) {
577 if (clear[i]) {
578 unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
579 unsigned int mbit = clear[i];
580
581 ret = regmap_update_bits(chip->regmap, reg, mbit, 0);
582 if (ret < 0) {
583 dev_err(chip->dev,
584 "Failed to unmask 0x%02x %d\n",
585 reg, ret);
586 goto error;
587 }
588 }
589 }
590
591 if (chip->persistent[0] | chip->persistent[1]) {
592 delay = msecs_to_jiffies(chip->passive_delay);
593 queue_delayed_work(system_freezable_wq, &chip->work, delay);
594 }
595
596 error:
597 return;
598 }
599
600 static irqreturn_t da9121_irq_handler(int irq, void *data)
601 {
602 struct da9121 *chip = data;
603 struct regulator_dev *rdev;
604 int event[3] = {0};
605 int handled[3] = {0};
606 int mask[3] = {0};
607 int ret = IRQ_NONE;
608 int i;
609 int err;
610
611 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3);
612 if (err < 0) {
613 dev_err(chip->dev, "Failed to read EVENT registers %d\n", err);
614 ret = IRQ_NONE;
615 goto error;
616 }
617
618 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3);
619 if (err < 0) {
620 dev_err(chip->dev,
621 "Failed to read MASK registers: %d\n", ret);
622 ret = IRQ_NONE;
623 goto error;
624 }
625
626 rdev = chip->rdev[DA9121_IDX_BUCK1];
627
628 /* Possible events are tested to be within range for the variant, currently
629 * enabled, and having triggered this IRQ. The event may then be notified,
630 * or a warning given for unexpected events - those from device POR, and
631 * currently unsupported GPIO configurations.
632 */
633 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
634 const struct status_event_data *item = &status_event_handling[i];
635 int reg_idx = item->reg_index;
636 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
637 bool enabled = !(mask[reg_idx] & item->mask_bit);
638 bool active = (event[reg_idx] & item->event_bit);
639 bool notify = (item->warn == NULL);
640
641 if (relevant && enabled && active) {
642 if (notify) {
643 chip->persistent[reg_idx] |= item->event_bit;
644 regulator_notifier_call_chain(rdev, item->notification, NULL);
645 } else {
646 dev_warn(chip->dev, item->warn);
647 handled[reg_idx] |= item->event_bit;
648 ret = IRQ_HANDLED;
649 }
650 }
651 }
652
653 for (i = 0; i < 3; i++) {
654 if (event[i] != handled[i]) {
655 dev_warn(chip->dev,
656 "Unhandled event(s) in bank%d 0x%02x\n", i,
657 event[i] ^ handled[i]);
658 }
659 }
660
661 /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */
662 for (i = 0; i < 2; i++) {
663 if (handled[i]) {
664 unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
665 unsigned int mbit = handled[i];
666
667 err = regmap_update_bits(chip->regmap, reg, mbit, mbit);
668 if (err < 0) {
669 dev_err(chip->dev,
670 "Failed to mask 0x%02x interrupt %d\n",
671 reg, err);
672 ret = IRQ_NONE;
673 goto error;
674 }
675 }
676 }
677
678 /* clear the events */
679 if (handled[0] | handled[1] | handled[2]) {
680 err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3);
681 if (err < 0) {
682 dev_err(chip->dev, "Fail to write EVENTs %d\n", err);
683 ret = IRQ_NONE;
684 goto error;
685 }
686 }
687
688 queue_delayed_work(system_freezable_wq, &chip->work, 0);
689 error:
690 return ret;
691 }
692
693 static int da9121_set_regulator_config(struct da9121 *chip)
694 {
695 struct regulator_config config = { };
696 unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
697 int ret = 0;
698 int i;
699
700 for (i = 0; i < max_matches; i++) {
701 const struct regulator_desc *regl_desc =
702 local_da9121_regulators[chip->variant_id][i];
703
704 config.dev = chip->dev;
705 config.driver_data = chip;
706 config.regmap = chip->regmap;
707
708 chip->rdev[i] = devm_regulator_register(chip->dev,
709 regl_desc, &config);
710 if (IS_ERR(chip->rdev[i])) {
711 dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
712 regl_desc->name, (i+1), max_matches);
713 ret = PTR_ERR(chip->rdev[i]);
714 goto error;
715 }
716 }
717
718 error:
719 return ret;
720 }
721
722 /* DA9121 chip register model */
723 static const struct regmap_range da9121_1ch_readable_ranges[] = {
724 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
725 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
726 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
727 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
728 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
729 };
730
731 static const struct regmap_access_table da9121_1ch_readable_table = {
732 .yes_ranges = da9121_1ch_readable_ranges,
733 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
734 };
735
736 static const struct regmap_range da9121_2ch_readable_ranges[] = {
737 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
738 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
739 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
740 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
741 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
742 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
743 };
744
745 static const struct regmap_access_table da9121_2ch_readable_table = {
746 .yes_ranges = da9121_2ch_readable_ranges,
747 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
748 };
749
750 static const struct regmap_range da9121_1ch_writeable_ranges[] = {
751 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
752 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
753 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
754 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
755 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
756 };
757
758 static const struct regmap_access_table da9121_1ch_writeable_table = {
759 .yes_ranges = da9121_1ch_writeable_ranges,
760 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
761 };
762
763 static const struct regmap_range da9121_2ch_writeable_ranges[] = {
764 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
765 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
766 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
767 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
768 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
769 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
770 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
771 };
772
773 static const struct regmap_access_table da9121_2ch_writeable_table = {
774 .yes_ranges = da9121_2ch_writeable_ranges,
775 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
776 };
777
778
779 static const struct regmap_range da9121_volatile_ranges[] = {
780 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
781 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
782 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
783 };
784
785 static const struct regmap_access_table da9121_volatile_table = {
786 .yes_ranges = da9121_volatile_ranges,
787 .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
788 };
789
790 /* DA9121 regmap config for 1 channel variants */
791 static struct regmap_config da9121_1ch_regmap_config = {
792 .reg_bits = 8,
793 .val_bits = 8,
794 .max_register = DA9121_REG_OTP_CONFIG_ID,
795 .rd_table = &da9121_1ch_readable_table,
796 .wr_table = &da9121_1ch_writeable_table,
797 .volatile_table = &da9121_volatile_table,
798 .cache_type = REGCACHE_RBTREE,
799 };
800
801 /* DA9121 regmap config for 2 channel variants */
802 static struct regmap_config da9121_2ch_regmap_config = {
803 .reg_bits = 8,
804 .val_bits = 8,
805 .max_register = DA9121_REG_OTP_CONFIG_ID,
806 .rd_table = &da9121_2ch_readable_table,
807 .wr_table = &da9121_2ch_writeable_table,
808 .volatile_table = &da9121_volatile_table,
809 .cache_type = REGCACHE_RBTREE,
810 };
811
812 static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
813 {
814 u32 device_id;
815 u8 chip_id = chip->variant_id;
816 u32 variant_id;
817 u8 variant_mrc, variant_vrc;
818 char *type;
819 bool config_match = false;
820 int ret = 0;
821
822 ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
823 if (ret < 0) {
824 dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
825 goto error;
826 }
827
828 ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
829 if (ret < 0) {
830 dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
831 goto error;
832 }
833
834 if (device_id != DA9121_DEVICE_ID) {
835 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
836 ret = -ENODEV;
837 goto error;
838 }
839
840 variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
841
842 switch (variant_vrc) {
843 case DA9121_VARIANT_VRC:
844 type = "DA9121/DA9130";
845 config_match = (chip_id == DA9121_TYPE_DA9121_DA9130);
846 break;
847 case DA9220_VARIANT_VRC:
848 type = "DA9220/DA9132";
849 config_match = (chip_id == DA9121_TYPE_DA9220_DA9132);
850 break;
851 case DA9122_VARIANT_VRC:
852 type = "DA9122/DA9131";
853 config_match = (chip_id == DA9121_TYPE_DA9122_DA9131);
854 break;
855 case DA9217_VARIANT_VRC:
856 type = "DA9217";
857 config_match = (chip_id == DA9121_TYPE_DA9217);
858 break;
859 default:
860 type = "Unknown";
861 break;
862 }
863
864 dev_info(chip->dev,
865 "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
866 device_id, variant_id, type);
867
868 if (!config_match) {
869 dev_err(chip->dev, "Device tree configuration does not match detected device.\n");
870 ret = -EINVAL;
871 goto error;
872 }
873
874 variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
875 >> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
876
877 if ((device_id == DA9121_DEVICE_ID) &&
878 (variant_mrc < DA9121_VARIANT_MRC_BASE)) {
879 dev_err(chip->dev,
880 "Cannot support variant MRC: 0x%02X\n", variant_mrc);
881 ret = -EINVAL;
882 }
883 error:
884 return ret;
885 }
886
887 static int da9121_assign_chip_model(struct i2c_client *i2c,
888 struct da9121 *chip)
889 {
890 struct regmap_config *regmap;
891 int ret = 0;
892
893 chip->dev = &i2c->dev;
894
895 switch (chip->variant_id) {
896 case DA9121_TYPE_DA9121_DA9130:
897 fallthrough;
898 case DA9121_TYPE_DA9217:
899 regmap = &da9121_1ch_regmap_config;
900 break;
901 case DA9121_TYPE_DA9122_DA9131:
902 fallthrough;
903 case DA9121_TYPE_DA9220_DA9132:
904 regmap = &da9121_2ch_regmap_config;
905 break;
906 }
907
908 /* Set these up for of_regulator_match call which may want .of_map_modes */
909 da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
910 da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
911
912 chip->regmap = devm_regmap_init_i2c(i2c, regmap);
913 if (IS_ERR(chip->regmap)) {
914 ret = PTR_ERR(chip->regmap);
915 dev_err(chip->dev, "Failed to configure a register map: %d\n",
916 ret);
917 return ret;
918 }
919
920 ret = da9121_check_device_type(i2c, chip);
921
922 return ret;
923 }
924
925 static int da9121_config_irq(struct i2c_client *i2c,
926 struct da9121 *chip)
927 {
928 unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
929 const int mask_all[4] = { 0, 0, 0xFF, 0xFF };
930 int ret = 0;
931
932 chip->chip_irq = i2c->irq;
933
934 if (chip->chip_irq != 0) {
935 if (!of_property_read_u32(chip->dev->of_node,
936 "dlg,irq-polling-delay-passive-ms",
937 &p_delay)) {
938 if (p_delay < DA9121_MIN_POLLING_PERIOD_MS ||
939 p_delay > DA9121_MAX_POLLING_PERIOD_MS) {
940 dev_warn(chip->dev,
941 "Out-of-range polling period %d ms\n",
942 p_delay);
943 p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
944 }
945 }
946
947 chip->passive_delay = p_delay;
948
949 ret = request_threaded_irq(chip->chip_irq, NULL,
950 da9121_irq_handler,
951 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
952 "da9121", chip);
953 if (ret != 0) {
954 dev_err(chip->dev, "Failed IRQ request: %d\n",
955 chip->chip_irq);
956 goto error;
957 }
958
959 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
960 if (ret != 0) {
961 dev_err(chip->dev, "Failed to set IRQ masks: %d\n",
962 ret);
963 goto regmap_error;
964 }
965
966 INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on);
967 dev_info(chip->dev, "Interrupt polling period set at %d ms\n",
968 chip->passive_delay);
969 }
970 error:
971 return ret;
972 regmap_error:
973 free_irq(chip->chip_irq, chip);
974 return ret;
975 }
976
977 static const struct of_device_id da9121_dt_ids[] = {
978 { .compatible = "dlg,da9121", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
979 { .compatible = "dlg,da9130", .data = (void *) DA9121_TYPE_DA9121_DA9130 },
980 { .compatible = "dlg,da9217", .data = (void *) DA9121_TYPE_DA9217 },
981 { .compatible = "dlg,da9122", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
982 { .compatible = "dlg,da9131", .data = (void *) DA9121_TYPE_DA9122_DA9131 },
983 { .compatible = "dlg,da9220", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
984 { .compatible = "dlg,da9132", .data = (void *) DA9121_TYPE_DA9220_DA9132 },
985 { }
986 };
987 MODULE_DEVICE_TABLE(of, da9121_dt_ids);
988
989 static inline int da9121_of_get_id(struct device *dev)
990 {
991 const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
992
993 if (!id) {
994 dev_err(dev, "%s: Failed\n", __func__);
995 return -EINVAL;
996 }
997 return (uintptr_t)id->data;
998 }
999
1000 static int da9121_i2c_probe(struct i2c_client *i2c,
1001 const struct i2c_device_id *id)
1002 {
1003 struct da9121 *chip;
1004 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1005 int ret = 0;
1006
1007 chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
1008 if (!chip) {
1009 ret = -ENOMEM;
1010 goto error;
1011 }
1012
1013 chip->pdata = i2c->dev.platform_data;
1014 chip->variant_id = da9121_of_get_id(&i2c->dev);
1015
1016 ret = da9121_assign_chip_model(i2c, chip);
1017 if (ret < 0)
1018 goto error;
1019
1020 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1021 if (ret != 0) {
1022 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1023 goto error;
1024 }
1025
1026 ret = da9121_set_regulator_config(chip);
1027 if (ret < 0)
1028 goto error;
1029
1030 ret = da9121_config_irq(i2c, chip);
1031
1032 error:
1033 return ret;
1034 }
1035
1036 static int da9121_i2c_remove(struct i2c_client *i2c)
1037 {
1038 struct da9121 *chip = i2c_get_clientdata(i2c);
1039 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1040 int ret = 0;
1041
1042 free_irq(chip->chip_irq, chip);
1043 cancel_delayed_work_sync(&chip->work);
1044
1045 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1046 if (ret != 0)
1047 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1048 return ret;
1049 }
1050
1051 static const struct i2c_device_id da9121_i2c_id[] = {
1052 {"da9121", DA9121_TYPE_DA9121_DA9130},
1053 {"da9130", DA9121_TYPE_DA9121_DA9130},
1054 {"da9217", DA9121_TYPE_DA9217},
1055 {"da9122", DA9121_TYPE_DA9122_DA9131},
1056 {"da9131", DA9121_TYPE_DA9122_DA9131},
1057 {"da9220", DA9121_TYPE_DA9220_DA9132},
1058 {"da9132", DA9121_TYPE_DA9220_DA9132},
1059 {},
1060 };
1061 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
1062
1063 static struct i2c_driver da9121_regulator_driver = {
1064 .driver = {
1065 .name = "da9121",
1066 .of_match_table = of_match_ptr(da9121_dt_ids),
1067 },
1068 .probe = da9121_i2c_probe,
1069 .remove = da9121_i2c_remove,
1070 .id_table = da9121_i2c_id,
1071 };
1072
1073 module_i2c_driver(da9121_regulator_driver);
1074
1075 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support