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.h>
17 #include <linux/gpio/consumer.h>
18 #include <linux/regulator/of_regulator.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/module.h>
22 #include <linux/regmap.h>
23 #include <linux/err.h>
24 #include <linux/i2c.h>
25 #include <linux/regulator/da9121.h>
26 #include <linux/interrupt.h>
27 #include <linux/workqueue.h>
28
29 #include "da9121-regulator.h"
30
31 /* Chip data */
32 struct da9121 {
33 struct device *dev;
34 struct delayed_work work;
35 struct da9121_pdata *pdata;
36 struct regmap *regmap;
37 struct regulator_dev *rdev[DA9121_IDX_MAX];
38 unsigned int persistent[2];
39 unsigned int passive_delay;
40 int chip_irq;
41 int variant_id;
42 int subvariant_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 const 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 const 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 const 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 const 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 static const struct da9121_range da914x_40A_4phase_current = {
89 .val_min = 26000000,
90 .val_max = 78000000,
91 .val_stp = 4000000,
92 .reg_min = 1,
93 .reg_max = 14,
94 };
95
96 static const struct da9121_range da914x_20A_2phase_current = {
97 .val_min = 13000000,
98 .val_max = 39000000,
99 .val_stp = 2000000,
100 .reg_min = 1,
101 .reg_max = 14,
102 };
103
104 struct da9121_variant_info {
105 int num_bucks;
106 int num_phases;
107 const struct da9121_range *current_range;
108 };
109
110 static const struct da9121_variant_info variant_parameters[] = {
111 { 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130
112 { 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132
113 { 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131
114 { 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217
115 { 1, 4, &da914x_40A_4phase_current }, //DA9121_TYPE_DA9141
116 { 1, 2, &da914x_20A_2phase_current }, //DA9121_TYPE_DA9142
117 };
118
119 struct da9121_field {
120 unsigned int reg;
121 unsigned int msk;
122 };
123
124 static const struct da9121_field da9121_current_field[2] = {
125 { DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
126 { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
127 };
128
129 static const struct da9121_field da9121_mode_field[2] = {
130 { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
131 { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
132 };
133
134 struct status_event_data {
135 int buck_id; /* 0=core, 1/2-buck */
136 int reg_index; /* index for status/event/mask register selection */
137 int status_bit; /* bit masks... */
138 int event_bit;
139 int mask_bit;
140 unsigned long notification; /* Notification for status inception */
141 char *warn; /* if NULL, notify - otherwise dev_warn this string */
142 };
143
144 #define DA9121_STATUS(id, bank, name, notification, warning) \
145 { id, bank, \
146 DA9121_MASK_SYS_STATUS_##bank##_##name, \
147 DA9121_MASK_SYS_EVENT_##bank##_E_##name, \
148 DA9121_MASK_SYS_MASK_##bank##_M_##name, \
149 notification, warning }
150
151 /* For second buck related event bits that are specific to DA9122, DA9220 variants */
152 #define DA9xxx_STATUS(id, bank, name, notification, warning) \
153 { id, bank, \
154 DA9xxx_MASK_SYS_STATUS_##bank##_##name, \
155 DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \
156 DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \
157 notification, warning }
158
159 /* The status signals that may need servicing, depending on device variant.
160 * After assertion, they persist; so event is notified, the IRQ disabled,
161 * and status polled until clear again and IRQ is reenabled.
162 *
163 * SG/PG1/PG2 should be set when device first powers up and should never
164 * re-occur. When this driver starts, it is expected that these will have
165 * self-cleared for when the IRQs are enabled, so these should never be seen.
166 * If seen, the implication is that the device has reset.
167 *
168 * GPIO0/1/2 are not configured for use by default, so should not be seen.
169 */
170 static const struct status_event_data status_event_handling[] = {
171 DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"),
172 DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL),
173 DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL),
174 DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"),
175 DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL),
176 DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
177 DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL),
178 DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"),
179 DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL),
180 DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
181 DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL),
182 DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"),
183 DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"),
184 DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"),
185 };
186
da9121_get_current_limit(struct regulator_dev * rdev)187 static int da9121_get_current_limit(struct regulator_dev *rdev)
188 {
189 struct da9121 *chip = rdev_get_drvdata(rdev);
190 int id = rdev_get_id(rdev);
191 const struct da9121_range *range =
192 variant_parameters[chip->variant_id].current_range;
193 unsigned int val = 0;
194 int ret = 0;
195
196 ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val);
197 if (ret < 0) {
198 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
199 goto error;
200 }
201
202 if (val < range->reg_min) {
203 ret = -EACCES;
204 goto error;
205 }
206
207 if (val > range->reg_max) {
208 ret = -EINVAL;
209 goto error;
210 }
211
212 return range->val_min + (range->val_stp * (val - range->reg_min));
213 error:
214 return ret;
215 }
216
da9121_ceiling_selector(struct regulator_dev * rdev,int min,int max,unsigned int * selector)217 static int da9121_ceiling_selector(struct regulator_dev *rdev,
218 int min, int max,
219 unsigned int *selector)
220 {
221 struct da9121 *chip = rdev_get_drvdata(rdev);
222 const struct da9121_range *range =
223 variant_parameters[chip->variant_id].current_range;
224 unsigned int level;
225 unsigned int i = 0;
226 unsigned int sel = 0;
227 int ret = 0;
228
229 if (range->val_min > max || range->val_max < min) {
230 dev_err(chip->dev,
231 "Requested current out of regulator capability\n");
232 ret = -EINVAL;
233 goto error;
234 }
235
236 level = range->val_max;
237 for (i = range->reg_max; i >= range->reg_min; i--) {
238 if (level <= max) {
239 sel = i;
240 break;
241 }
242 level -= range->val_stp;
243 }
244
245 if (level < min) {
246 dev_err(chip->dev,
247 "Best match falls below minimum requested current\n");
248 ret = -EINVAL;
249 goto error;
250 }
251
252 *selector = sel;
253 error:
254 return ret;
255 }
256
da9121_set_current_limit(struct regulator_dev * rdev,int min_ua,int max_ua)257 static int da9121_set_current_limit(struct regulator_dev *rdev,
258 int min_ua, int max_ua)
259 {
260 struct da9121 *chip = rdev_get_drvdata(rdev);
261 int id = rdev_get_id(rdev);
262 const struct da9121_range *range =
263 variant_parameters[chip->variant_id].current_range;
264 unsigned int sel = 0;
265 int ret = 0;
266
267 if (min_ua < range->val_min ||
268 max_ua > range->val_max) {
269 ret = -EINVAL;
270 goto error;
271 }
272
273 if (rdev->desc->ops->is_enabled(rdev)) {
274 ret = -EBUSY;
275 goto error;
276 }
277
278 ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
279 if (ret < 0)
280 goto error;
281
282 ret = regmap_update_bits(chip->regmap,
283 da9121_current_field[id].reg,
284 da9121_current_field[id].msk,
285 (unsigned int)sel);
286 if (ret < 0)
287 dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret);
288
289 error:
290 return ret;
291 }
292
da9121_map_mode(unsigned int mode)293 static unsigned int da9121_map_mode(unsigned int mode)
294 {
295 switch (mode) {
296 case DA9121_BUCK_MODE_FORCE_PWM:
297 return REGULATOR_MODE_FAST;
298 case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
299 return REGULATOR_MODE_NORMAL;
300 case DA9121_BUCK_MODE_AUTO:
301 return REGULATOR_MODE_IDLE;
302 case DA9121_BUCK_MODE_FORCE_PFM:
303 return REGULATOR_MODE_STANDBY;
304 default:
305 return REGULATOR_MODE_INVALID;
306 }
307 }
308
da9121_buck_set_mode(struct regulator_dev * rdev,unsigned int mode)309 static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
310 {
311 struct da9121 *chip = rdev_get_drvdata(rdev);
312 int id = rdev_get_id(rdev);
313 unsigned int val;
314
315 switch (mode) {
316 case REGULATOR_MODE_FAST:
317 val = DA9121_BUCK_MODE_FORCE_PWM;
318 break;
319 case REGULATOR_MODE_NORMAL:
320 val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
321 break;
322 case REGULATOR_MODE_IDLE:
323 val = DA9121_BUCK_MODE_AUTO;
324 break;
325 case REGULATOR_MODE_STANDBY:
326 val = DA9121_BUCK_MODE_FORCE_PFM;
327 break;
328 default:
329 return -EINVAL;
330 }
331
332 return regmap_update_bits(chip->regmap,
333 da9121_mode_field[id].reg,
334 da9121_mode_field[id].msk,
335 val);
336 }
337
da9121_buck_get_mode(struct regulator_dev * rdev)338 static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
339 {
340 struct da9121 *chip = rdev_get_drvdata(rdev);
341 int id = rdev_get_id(rdev);
342 unsigned int val, mode;
343 int ret = 0;
344
345 ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
346 if (ret < 0) {
347 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
348 return -EINVAL;
349 }
350
351 mode = da9121_map_mode(val & da9121_mode_field[id].msk);
352 if (mode == REGULATOR_MODE_INVALID)
353 return -EINVAL;
354
355 return mode;
356 }
357
358 static const struct regulator_ops da9121_buck_ops = {
359 .enable = regulator_enable_regmap,
360 .disable = regulator_disable_regmap,
361 .is_enabled = regulator_is_enabled_regmap,
362 .set_voltage_sel = regulator_set_voltage_sel_regmap,
363 .get_voltage_sel = regulator_get_voltage_sel_regmap,
364 .list_voltage = regulator_list_voltage_linear,
365 .get_current_limit = da9121_get_current_limit,
366 .set_current_limit = da9121_set_current_limit,
367 .set_mode = da9121_buck_set_mode,
368 .get_mode = da9121_buck_get_mode,
369 };
370
371 static struct of_regulator_match da9121_matches[] = {
372 [DA9121_IDX_BUCK1] = { .name = "buck1" },
373 [DA9121_IDX_BUCK2] = { .name = "buck2" },
374 };
375
da9121_of_parse_cb(struct device_node * np,const struct regulator_desc * desc,struct regulator_config * config)376 static int da9121_of_parse_cb(struct device_node *np,
377 const struct regulator_desc *desc,
378 struct regulator_config *config)
379 {
380 struct da9121 *chip = config->driver_data;
381 struct da9121_pdata *pdata;
382 struct gpio_desc *ena_gpiod;
383
384 if (chip->pdata == NULL) {
385 pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
386 if (!pdata)
387 return -ENOMEM;
388 } else {
389 pdata = chip->pdata;
390 }
391
392 pdata->num_buck++;
393
394 if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
395 dev_err(chip->dev, "Error: excessive regulators for device\n");
396 return -ENODEV;
397 }
398
399 ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
400 GPIOD_OUT_HIGH |
401 GPIOD_FLAGS_BIT_NONEXCLUSIVE,
402 "da9121-enable");
403 if (!IS_ERR(ena_gpiod))
404 config->ena_gpiod = ena_gpiod;
405
406 if (variant_parameters[chip->variant_id].num_bucks == 2) {
407 uint32_t ripple_cancel;
408 uint32_t ripple_reg;
409 int ret;
410
411 if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node,
412 "dlg,ripple-cancel", &ripple_cancel)) {
413 if (pdata->num_buck > 1)
414 ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
415 else
416 ripple_reg = DA9121_REG_BUCK_BUCK1_7;
417
418 ret = regmap_update_bits(chip->regmap, ripple_reg,
419 DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
420 ripple_cancel);
421 if (ret < 0)
422 dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
423 }
424 }
425
426 return 0;
427 }
428
429 #define DA9121_MIN_MV 300
430 #define DA9121_MAX_MV 1900
431 #define DA9121_STEP_MV 10
432 #define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV)
433 #define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
434 + 1 + DA9121_MIN_SEL)
435
436 static const struct regulator_desc da9121_reg = {
437 .id = DA9121_IDX_BUCK1,
438 .name = "da9121",
439 .of_match = "buck1",
440 .of_parse_cb = da9121_of_parse_cb,
441 .owner = THIS_MODULE,
442 .regulators_node = "regulators",
443 .of_map_mode = da9121_map_mode,
444 .ops = &da9121_buck_ops,
445 .type = REGULATOR_VOLTAGE,
446 .n_voltages = DA9121_N_VOLTAGES,
447 .min_uV = DA9121_MIN_MV * 1000,
448 .uV_step = DA9121_STEP_MV * 1000,
449 .linear_min_sel = DA9121_MIN_SEL,
450 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
451 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
452 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
453 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
454 /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
455 .ramp_delay = 20000,
456 /* tBUCK_EN */
457 .enable_time = 20,
458 };
459
460 static const struct regulator_desc da9220_reg[2] = {
461 {
462 .id = DA9121_IDX_BUCK1,
463 .name = "DA9220/DA9132 BUCK1",
464 .of_match = "buck1",
465 .of_parse_cb = da9121_of_parse_cb,
466 .owner = THIS_MODULE,
467 .regulators_node = "regulators",
468 .of_map_mode = da9121_map_mode,
469 .ops = &da9121_buck_ops,
470 .type = REGULATOR_VOLTAGE,
471 .n_voltages = DA9121_N_VOLTAGES,
472 .min_uV = DA9121_MIN_MV * 1000,
473 .uV_step = DA9121_STEP_MV * 1000,
474 .linear_min_sel = DA9121_MIN_SEL,
475 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
476 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
477 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
478 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
479 },
480 {
481 .id = DA9121_IDX_BUCK2,
482 .name = "DA9220/DA9132 BUCK2",
483 .of_match = "buck2",
484 .of_parse_cb = da9121_of_parse_cb,
485 .owner = THIS_MODULE,
486 .regulators_node = "regulators",
487 .of_map_mode = da9121_map_mode,
488 .ops = &da9121_buck_ops,
489 .type = REGULATOR_VOLTAGE,
490 .n_voltages = DA9121_N_VOLTAGES,
491 .min_uV = DA9121_MIN_MV * 1000,
492 .uV_step = DA9121_STEP_MV * 1000,
493 .linear_min_sel = DA9121_MIN_SEL,
494 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
495 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
496 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
497 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
498 }
499 };
500
501 static const struct regulator_desc da9122_reg[2] = {
502 {
503 .id = DA9121_IDX_BUCK1,
504 .name = "DA9122/DA9131 BUCK1",
505 .of_match = "buck1",
506 .of_parse_cb = da9121_of_parse_cb,
507 .owner = THIS_MODULE,
508 .regulators_node = "regulators",
509 .of_map_mode = da9121_map_mode,
510 .ops = &da9121_buck_ops,
511 .type = REGULATOR_VOLTAGE,
512 .n_voltages = DA9121_N_VOLTAGES,
513 .min_uV = DA9121_MIN_MV * 1000,
514 .uV_step = DA9121_STEP_MV * 1000,
515 .linear_min_sel = DA9121_MIN_SEL,
516 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
517 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
518 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
519 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
520 },
521 {
522 .id = DA9121_IDX_BUCK2,
523 .name = "DA9122/DA9131 BUCK2",
524 .of_match = "buck2",
525 .of_parse_cb = da9121_of_parse_cb,
526 .owner = THIS_MODULE,
527 .regulators_node = "regulators",
528 .of_map_mode = da9121_map_mode,
529 .ops = &da9121_buck_ops,
530 .type = REGULATOR_VOLTAGE,
531 .n_voltages = DA9121_N_VOLTAGES,
532 .min_uV = DA9121_MIN_MV * 1000,
533 .uV_step = DA9121_STEP_MV * 1000,
534 .linear_min_sel = DA9121_MIN_SEL,
535 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
536 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
537 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
538 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
539 }
540 };
541
542 static const struct regulator_desc da9217_reg = {
543 .id = DA9121_IDX_BUCK1,
544 .name = "DA9217 BUCK1",
545 .of_match = "buck1",
546 .of_parse_cb = da9121_of_parse_cb,
547 .owner = THIS_MODULE,
548 .regulators_node = "regulators",
549 .of_map_mode = da9121_map_mode,
550 .ops = &da9121_buck_ops,
551 .type = REGULATOR_VOLTAGE,
552 .n_voltages = DA9121_N_VOLTAGES,
553 .min_uV = DA9121_MIN_MV * 1000,
554 .uV_step = DA9121_STEP_MV * 1000,
555 .linear_min_sel = DA9121_MIN_SEL,
556 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
557 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
558 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
559 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
560 };
561
562 #define DA914X_MIN_MV 500
563 #define DA914X_MAX_MV 1300
564 #define DA914X_STEP_MV 10
565 #define DA914X_MIN_SEL (DA914X_MIN_MV / DA914X_STEP_MV)
566 #define DA914X_N_VOLTAGES (((DA914X_MAX_MV - DA914X_MIN_MV) / DA914X_STEP_MV) \
567 + 1 + DA914X_MIN_SEL)
568
569 static const struct regulator_desc da9141_reg = {
570 .id = DA9121_IDX_BUCK1,
571 .name = "DA9141",
572 .of_match = "buck1",
573 .of_parse_cb = da9121_of_parse_cb,
574 .owner = THIS_MODULE,
575 .regulators_node = "regulators",
576 .of_map_mode = da9121_map_mode,
577 .ops = &da9121_buck_ops,
578 .type = REGULATOR_VOLTAGE,
579 .n_voltages = DA914X_N_VOLTAGES,
580 .min_uV = DA914X_MIN_MV * 1000,
581 .uV_step = DA914X_STEP_MV * 1000,
582 .linear_min_sel = DA914X_MIN_SEL,
583 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
584 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
585 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
586 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
587 };
588
589 static const struct regulator_desc da9142_reg = {
590 .id = DA9121_IDX_BUCK1,
591 .name = "DA9142 BUCK1",
592 .of_match = "buck1",
593 .of_parse_cb = da9121_of_parse_cb,
594 .owner = THIS_MODULE,
595 .regulators_node = "regulators",
596 .of_map_mode = da9121_map_mode,
597 .ops = &da9121_buck_ops,
598 .type = REGULATOR_VOLTAGE,
599 .n_voltages = DA914X_N_VOLTAGES,
600 .min_uV = DA914X_MIN_MV * 1000,
601 .uV_step = DA914X_STEP_MV * 1000,
602 .linear_min_sel = DA914X_MIN_SEL,
603 .enable_reg = DA9121_REG_BUCK_BUCK1_0,
604 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
605 .vsel_reg = DA9121_REG_BUCK_BUCK1_5,
606 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
607 };
608
609
610 static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
611 [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
612 [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
613 [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
614 [DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
615 [DA9121_TYPE_DA9141] = { &da9141_reg, NULL },
616 [DA9121_TYPE_DA9142] = { &da9142_reg, NULL },
617 };
618
da9121_status_poll_on(struct work_struct * work)619 static void da9121_status_poll_on(struct work_struct *work)
620 {
621 struct da9121 *chip = container_of(work, struct da9121, work.work);
622 int status[3] = {0};
623 int clear[3] = {0};
624 unsigned long delay;
625 int i;
626 int ret;
627
628 ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2);
629 if (ret < 0) {
630 dev_err(chip->dev,
631 "Failed to read STATUS registers: %d\n", ret);
632 goto error;
633 }
634
635 /* Possible events are tested to be within range for the variant, potentially
636 * masked by the IRQ handler (not just warned about), as having been masked,
637 * and the respective state cleared - then flagged to unmask for next IRQ.
638 */
639 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
640 const struct status_event_data *item = &status_event_handling[i];
641 int reg_idx = item->reg_index;
642 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
643 bool supported = (item->warn == NULL);
644 bool persisting = (chip->persistent[reg_idx] & item->event_bit);
645 bool now_cleared = !(status[reg_idx] & item->status_bit);
646
647 if (relevant && supported && persisting && now_cleared) {
648 clear[reg_idx] |= item->mask_bit;
649 chip->persistent[reg_idx] &= ~item->event_bit;
650 }
651 }
652
653 for (i = 0; i < 2; i++) {
654 if (clear[i]) {
655 unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
656 unsigned int mbit = clear[i];
657
658 ret = regmap_update_bits(chip->regmap, reg, mbit, 0);
659 if (ret < 0) {
660 dev_err(chip->dev,
661 "Failed to unmask 0x%02x %d\n",
662 reg, ret);
663 goto error;
664 }
665 }
666 }
667
668 if (chip->persistent[0] | chip->persistent[1]) {
669 delay = msecs_to_jiffies(chip->passive_delay);
670 queue_delayed_work(system_freezable_wq, &chip->work, delay);
671 }
672
673 error:
674 return;
675 }
676
da9121_irq_handler(int irq,void * data)677 static irqreturn_t da9121_irq_handler(int irq, void *data)
678 {
679 struct da9121 *chip = data;
680 struct regulator_dev *rdev;
681 int event[3] = {0};
682 int handled[3] = {0};
683 int mask[3] = {0};
684 int ret = IRQ_NONE;
685 int i;
686 int err;
687
688 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3);
689 if (err < 0) {
690 dev_err(chip->dev, "Failed to read EVENT registers %d\n", err);
691 ret = IRQ_NONE;
692 goto error;
693 }
694
695 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3);
696 if (err < 0) {
697 dev_err(chip->dev,
698 "Failed to read MASK registers: %d\n", ret);
699 ret = IRQ_NONE;
700 goto error;
701 }
702
703 rdev = chip->rdev[DA9121_IDX_BUCK1];
704
705 /* Possible events are tested to be within range for the variant, currently
706 * enabled, and having triggered this IRQ. The event may then be notified,
707 * or a warning given for unexpected events - those from device POR, and
708 * currently unsupported GPIO configurations.
709 */
710 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
711 const struct status_event_data *item = &status_event_handling[i];
712 int reg_idx = item->reg_index;
713 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
714 bool enabled = !(mask[reg_idx] & item->mask_bit);
715 bool active = (event[reg_idx] & item->event_bit);
716 bool notify = (item->warn == NULL);
717
718 if (relevant && enabled && active) {
719 if (notify) {
720 chip->persistent[reg_idx] |= item->event_bit;
721 regulator_notifier_call_chain(rdev, item->notification, NULL);
722 } else {
723 dev_warn(chip->dev, item->warn);
724 handled[reg_idx] |= item->event_bit;
725 ret = IRQ_HANDLED;
726 }
727 }
728 }
729
730 for (i = 0; i < 3; i++) {
731 if (event[i] != handled[i]) {
732 dev_warn(chip->dev,
733 "Unhandled event(s) in bank%d 0x%02x\n", i,
734 event[i] ^ handled[i]);
735 }
736 }
737
738 /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */
739 for (i = 0; i < 2; i++) {
740 if (handled[i]) {
741 unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
742 unsigned int mbit = handled[i];
743
744 err = regmap_update_bits(chip->regmap, reg, mbit, mbit);
745 if (err < 0) {
746 dev_err(chip->dev,
747 "Failed to mask 0x%02x interrupt %d\n",
748 reg, err);
749 ret = IRQ_NONE;
750 goto error;
751 }
752 }
753 }
754
755 /* clear the events */
756 if (handled[0] | handled[1] | handled[2]) {
757 err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3);
758 if (err < 0) {
759 dev_err(chip->dev, "Fail to write EVENTs %d\n", err);
760 ret = IRQ_NONE;
761 goto error;
762 }
763 }
764
765 queue_delayed_work(system_freezable_wq, &chip->work, 0);
766 error:
767 return ret;
768 }
769
da9121_set_regulator_config(struct da9121 * chip)770 static int da9121_set_regulator_config(struct da9121 *chip)
771 {
772 struct regulator_config config = { };
773 unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
774 int ret = 0;
775 int i;
776
777 for (i = 0; i < max_matches; i++) {
778 const struct regulator_desc *regl_desc =
779 local_da9121_regulators[chip->variant_id][i];
780
781 config.dev = chip->dev;
782 config.driver_data = chip;
783 config.regmap = chip->regmap;
784
785 chip->rdev[i] = devm_regulator_register(chip->dev,
786 regl_desc, &config);
787 if (IS_ERR(chip->rdev[i])) {
788 dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
789 regl_desc->name, (i+1), max_matches);
790 ret = PTR_ERR(chip->rdev[i]);
791 goto error;
792 }
793 }
794
795 error:
796 return ret;
797 }
798
799 /* DA9121 chip register model */
800 static const struct regmap_range da9121_1ch_readable_ranges[] = {
801 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
802 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
803 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
804 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
805 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
806 };
807
808 static const struct regmap_access_table da9121_1ch_readable_table = {
809 .yes_ranges = da9121_1ch_readable_ranges,
810 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
811 };
812
813 static const struct regmap_range da9121_2ch_readable_ranges[] = {
814 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
815 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
816 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
817 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
818 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
819 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
820 };
821
822 static const struct regmap_access_table da9121_2ch_readable_table = {
823 .yes_ranges = da9121_2ch_readable_ranges,
824 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
825 };
826
827 static const struct regmap_range da9121_1ch_writeable_ranges[] = {
828 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
829 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
830 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
831 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
832 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
833 };
834
835 static const struct regmap_access_table da9121_1ch_writeable_table = {
836 .yes_ranges = da9121_1ch_writeable_ranges,
837 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
838 };
839
840 static const struct regmap_range da9121_2ch_writeable_ranges[] = {
841 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
842 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
843 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
844 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
845 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
846 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
847 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
848 };
849
850 static const struct regmap_access_table da9121_2ch_writeable_table = {
851 .yes_ranges = da9121_2ch_writeable_ranges,
852 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
853 };
854
855
856 static const struct regmap_range da9121_volatile_ranges[] = {
857 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
858 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
859 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
860 };
861
862 static const struct regmap_access_table da9121_volatile_table = {
863 .yes_ranges = da9121_volatile_ranges,
864 .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
865 };
866
867 /* DA9121 regmap config for 1 channel variants */
868 static const struct regmap_config da9121_1ch_regmap_config = {
869 .reg_bits = 8,
870 .val_bits = 8,
871 .max_register = DA9121_REG_OTP_CONFIG_ID,
872 .rd_table = &da9121_1ch_readable_table,
873 .wr_table = &da9121_1ch_writeable_table,
874 .volatile_table = &da9121_volatile_table,
875 .cache_type = REGCACHE_MAPLE,
876 };
877
878 /* DA9121 regmap config for 2 channel variants */
879 static const struct regmap_config da9121_2ch_regmap_config = {
880 .reg_bits = 8,
881 .val_bits = 8,
882 .max_register = DA9121_REG_OTP_CONFIG_ID,
883 .rd_table = &da9121_2ch_readable_table,
884 .wr_table = &da9121_2ch_writeable_table,
885 .volatile_table = &da9121_volatile_table,
886 .cache_type = REGCACHE_MAPLE,
887 };
888
da9121_check_device_type(struct i2c_client * i2c,struct da9121 * chip)889 static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
890 {
891 u32 device_id;
892 u32 variant_id;
893 u8 variant_mrc, variant_vrc;
894 char *type;
895 bool config_match = false;
896 int ret = 0;
897
898 ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
899 if (ret < 0) {
900 dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
901 goto error;
902 }
903
904 ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
905 if (ret < 0) {
906 dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
907 goto error;
908 }
909
910 if ((device_id != DA9121_DEVICE_ID) && (device_id != DA914x_DEVICE_ID)) {
911 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
912 ret = -ENODEV;
913 goto error;
914 }
915
916 variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
917
918 switch (chip->subvariant_id) {
919 case DA9121_SUBTYPE_DA9121:
920 type = "DA9121";
921 config_match = (variant_vrc == DA9121_VARIANT_VRC);
922 break;
923 case DA9121_SUBTYPE_DA9130:
924 type = "DA9130";
925 config_match = (variant_vrc == DA9130_VARIANT_VRC);
926 break;
927 case DA9121_SUBTYPE_DA9220:
928 type = "DA9220";
929 config_match = (variant_vrc == DA9220_VARIANT_VRC);
930 break;
931 case DA9121_SUBTYPE_DA9132:
932 type = "DA9132";
933 config_match = (variant_vrc == DA9132_VARIANT_VRC);
934 break;
935 case DA9121_SUBTYPE_DA9122:
936 type = "DA9122";
937 config_match = (variant_vrc == DA9122_VARIANT_VRC);
938 break;
939 case DA9121_SUBTYPE_DA9131:
940 type = "DA9131";
941 config_match = (variant_vrc == DA9131_VARIANT_VRC);
942 break;
943 case DA9121_SUBTYPE_DA9217:
944 type = "DA9217";
945 config_match = (variant_vrc == DA9217_VARIANT_VRC);
946 break;
947 default:
948 type = "Unknown";
949 break;
950 }
951
952 if (device_id == DA914x_DEVICE_ID) {
953 switch (chip->subvariant_id) {
954 case DA9121_SUBTYPE_DA9141:
955 type = "DA9141";
956 config_match = (variant_vrc == DA9141_VARIANT_VRC);
957 break;
958 case DA9121_SUBTYPE_DA9142:
959 type = "DA9142";
960 config_match = (variant_vrc == DA9142_VARIANT_VRC);
961 break;
962 default:
963 type = "Unknown";
964 break;
965 }
966 }
967
968 dev_info(chip->dev,
969 "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
970 device_id, variant_id, type);
971
972 if (!config_match) {
973 dev_err(chip->dev, "Device tree configuration does not match detected device.\n");
974 ret = -EINVAL;
975 goto error;
976 }
977
978 variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
979 >> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
980
981 if (((device_id == DA9121_DEVICE_ID) &&
982 (variant_mrc < DA9121_VARIANT_MRC_BASE)) ||
983 ((device_id == DA914x_DEVICE_ID) &&
984 (variant_mrc != DA914x_VARIANT_MRC_BASE))) {
985 dev_err(chip->dev,
986 "Cannot support variant MRC: 0x%02X\n", variant_mrc);
987 ret = -EINVAL;
988 }
989 error:
990 return ret;
991 }
992
da9121_assign_chip_model(struct i2c_client * i2c,struct da9121 * chip)993 static int da9121_assign_chip_model(struct i2c_client *i2c,
994 struct da9121 *chip)
995 {
996 const struct regmap_config *regmap;
997 int ret = 0;
998
999 chip->dev = &i2c->dev;
1000
1001 /* Use configured subtype to select the regulator descriptor index and
1002 * register map, common to both consumer and automotive grade variants
1003 */
1004 switch (chip->subvariant_id) {
1005 case DA9121_SUBTYPE_DA9121:
1006 case DA9121_SUBTYPE_DA9130:
1007 chip->variant_id = DA9121_TYPE_DA9121_DA9130;
1008 regmap = &da9121_1ch_regmap_config;
1009 break;
1010 case DA9121_SUBTYPE_DA9217:
1011 chip->variant_id = DA9121_TYPE_DA9217;
1012 regmap = &da9121_1ch_regmap_config;
1013 break;
1014 case DA9121_SUBTYPE_DA9122:
1015 case DA9121_SUBTYPE_DA9131:
1016 chip->variant_id = DA9121_TYPE_DA9122_DA9131;
1017 regmap = &da9121_2ch_regmap_config;
1018 break;
1019 case DA9121_SUBTYPE_DA9220:
1020 case DA9121_SUBTYPE_DA9132:
1021 chip->variant_id = DA9121_TYPE_DA9220_DA9132;
1022 regmap = &da9121_2ch_regmap_config;
1023 break;
1024 case DA9121_SUBTYPE_DA9141:
1025 chip->variant_id = DA9121_TYPE_DA9141;
1026 regmap = &da9121_1ch_regmap_config;
1027 break;
1028 case DA9121_SUBTYPE_DA9142:
1029 chip->variant_id = DA9121_TYPE_DA9142;
1030 regmap = &da9121_2ch_regmap_config;
1031 break;
1032 default:
1033 return -EINVAL;
1034 }
1035
1036 /* Set these up for of_regulator_match call which may want .of_map_modes */
1037 da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
1038 da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
1039
1040 chip->regmap = devm_regmap_init_i2c(i2c, regmap);
1041 if (IS_ERR(chip->regmap)) {
1042 ret = PTR_ERR(chip->regmap);
1043 dev_err(chip->dev, "Failed to configure a register map: %d\n",
1044 ret);
1045 return ret;
1046 }
1047
1048 ret = da9121_check_device_type(i2c, chip);
1049
1050 return ret;
1051 }
1052
da9121_config_irq(struct i2c_client * i2c,struct da9121 * chip)1053 static int da9121_config_irq(struct i2c_client *i2c,
1054 struct da9121 *chip)
1055 {
1056 unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1057 const int mask_all[4] = { 0, 0, 0xFF, 0xFF };
1058 int ret = 0;
1059
1060 chip->chip_irq = i2c->irq;
1061
1062 if (chip->chip_irq != 0) {
1063 if (!of_property_read_u32(chip->dev->of_node,
1064 "dlg,irq-polling-delay-passive-ms",
1065 &p_delay)) {
1066 if (p_delay < DA9121_MIN_POLLING_PERIOD_MS ||
1067 p_delay > DA9121_MAX_POLLING_PERIOD_MS) {
1068 dev_warn(chip->dev,
1069 "Out-of-range polling period %d ms\n",
1070 p_delay);
1071 p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1072 }
1073 }
1074
1075 chip->passive_delay = p_delay;
1076
1077 ret = request_threaded_irq(chip->chip_irq, NULL,
1078 da9121_irq_handler,
1079 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
1080 "da9121", chip);
1081 if (ret != 0) {
1082 dev_err(chip->dev, "Failed IRQ request: %d\n",
1083 chip->chip_irq);
1084 goto error;
1085 }
1086
1087 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1088 if (ret != 0) {
1089 dev_err(chip->dev, "Failed to set IRQ masks: %d\n",
1090 ret);
1091 goto regmap_error;
1092 }
1093
1094 INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on);
1095 dev_info(chip->dev, "Interrupt polling period set at %d ms\n",
1096 chip->passive_delay);
1097 }
1098 error:
1099 return ret;
1100 regmap_error:
1101 free_irq(chip->chip_irq, chip);
1102 return ret;
1103 }
1104
1105 static const struct of_device_id da9121_dt_ids[] = {
1106 { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 },
1107 { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 },
1108 { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 },
1109 { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 },
1110 { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 },
1111 { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 },
1112 { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 },
1113 { .compatible = "dlg,da9141", .data = (void *) DA9121_SUBTYPE_DA9141 },
1114 { .compatible = "dlg,da9142", .data = (void *) DA9121_SUBTYPE_DA9142 },
1115 { }
1116 };
1117 MODULE_DEVICE_TABLE(of, da9121_dt_ids);
1118
da9121_i2c_probe(struct i2c_client * i2c)1119 static int da9121_i2c_probe(struct i2c_client *i2c)
1120 {
1121 struct da9121 *chip;
1122 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1123 int ret = 0;
1124
1125 chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
1126 if (!chip) {
1127 ret = -ENOMEM;
1128 goto error;
1129 }
1130
1131 chip->pdata = i2c->dev.platform_data;
1132 chip->subvariant_id = (enum da9121_subvariant)i2c_get_match_data(i2c);
1133
1134 ret = da9121_assign_chip_model(i2c, chip);
1135 if (ret < 0)
1136 goto error;
1137
1138 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1139 if (ret != 0) {
1140 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1141 goto error;
1142 }
1143
1144 ret = da9121_set_regulator_config(chip);
1145 if (ret < 0)
1146 goto error;
1147
1148 ret = da9121_config_irq(i2c, chip);
1149
1150 error:
1151 return ret;
1152 }
1153
da9121_i2c_remove(struct i2c_client * i2c)1154 static void da9121_i2c_remove(struct i2c_client *i2c)
1155 {
1156 struct da9121 *chip = i2c_get_clientdata(i2c);
1157 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1158 int ret;
1159
1160 free_irq(chip->chip_irq, chip);
1161 cancel_delayed_work_sync(&chip->work);
1162
1163 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1164 if (ret != 0)
1165 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1166 }
1167
1168 static const struct i2c_device_id da9121_i2c_id[] = {
1169 {"da9121", DA9121_TYPE_DA9121_DA9130},
1170 {"da9130", DA9121_TYPE_DA9121_DA9130},
1171 {"da9217", DA9121_TYPE_DA9217},
1172 {"da9122", DA9121_TYPE_DA9122_DA9131},
1173 {"da9131", DA9121_TYPE_DA9122_DA9131},
1174 {"da9220", DA9121_TYPE_DA9220_DA9132},
1175 {"da9132", DA9121_TYPE_DA9220_DA9132},
1176 {"da9141", DA9121_TYPE_DA9141},
1177 {"da9142", DA9121_TYPE_DA9142},
1178 {},
1179 };
1180 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
1181
1182 static struct i2c_driver da9121_regulator_driver = {
1183 .driver = {
1184 .name = "da9121",
1185 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1186 .of_match_table = da9121_dt_ids,
1187 },
1188 .probe = da9121_i2c_probe,
1189 .remove = da9121_i2c_remove,
1190 .id_table = da9121_i2c_id,
1191 };
1192
1193 module_i2c_driver(da9121_regulator_driver);
1194
1195 MODULE_DESCRIPTION("Dialog Semiconductor DA9121/DA9122/DA9220/DA9217/DA9130/DA9131/DA9132 regulator driver");
1196 MODULE_LICENSE("GPL v2");
1197