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 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 | static 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 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 | 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 | |
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 | 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(map: chip->regmap, reg: da9121_current_field[id].reg, val: &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 | |
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 | 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 | |
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 | 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: min_ua, max: max_ua, selector: &sel); |
279 | if (ret < 0) |
280 | goto error; |
281 | |
282 | ret = regmap_update_bits(map: chip->regmap, |
283 | reg: da9121_current_field[id].reg, |
284 | mask: da9121_current_field[id].msk, |
285 | val: (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 | |
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 | |
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(map: chip->regmap, |
333 | reg: da9121_mode_field[id].reg, |
334 | mask: da9121_mode_field[id].msk, |
335 | val); |
336 | } |
337 | |
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(map: chip->regmap, reg: da9121_mode_field[id].reg, val: &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(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 | |
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(dev: chip->dev, size: 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), con_id: "enable" , index: 0, |
400 | flags: GPIOD_OUT_HIGH | |
401 | GPIOD_FLAGS_BIT_NONEXCLUSIVE, |
402 | label: "da9121-enable" ); |
403 | if (!IS_ERR(ptr: 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(np: da9121_matches[pdata->num_buck-1].of_node, |
412 | propname: "dlg,ripple-cancel" , out_value: &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(map: chip->regmap, reg: ripple_reg, |
419 | DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL, |
420 | val: 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 | |
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(map: chip->regmap, DA9121_REG_SYS_STATUS_0, val: status, val_count: 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(map: chip->regmap, reg, mask: mbit, val: 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(m: chip->passive_delay); |
670 | queue_delayed_work(wq: system_freezable_wq, dwork: &chip->work, delay); |
671 | } |
672 | |
673 | error: |
674 | return; |
675 | } |
676 | |
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(map: chip->regmap, DA9121_REG_SYS_EVENT_0, val: event, val_count: 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(map: chip->regmap, DA9121_REG_SYS_MASK_0, val: mask, val_count: 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, event: 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(map: chip->regmap, reg, mask: mbit, val: 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(map: chip->regmap, DA9121_REG_SYS_EVENT_0, val: handled, val_count: 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(wq: system_freezable_wq, dwork: &chip->work, delay: 0); |
766 | error: |
767 | return ret; |
768 | } |
769 | |
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(dev: chip->dev, |
786 | regulator_desc: regl_desc, config: &config); |
787 | if (IS_ERR(ptr: 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(ptr: 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 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_RBTREE, |
876 | }; |
877 | |
878 | /* DA9121 regmap config for 2 channel variants */ |
879 | static 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_RBTREE, |
887 | }; |
888 | |
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(map: chip->regmap, DA9121_REG_OTP_DEVICE_ID, val: &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(map: chip->regmap, DA9121_REG_OTP_VARIANT_ID, val: &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 | |
993 | static int da9121_assign_chip_model(struct i2c_client *i2c, |
994 | struct da9121 *chip) |
995 | { |
996 | 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(ptr: chip->regmap)) { |
1042 | ret = PTR_ERR(ptr: 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 | |
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(np: chip->dev->of_node, |
1064 | propname: "dlg,irq-polling-delay-passive-ms" , |
1065 | out_value: &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(irq: chip->chip_irq, NULL, |
1078 | thread_fn: da9121_irq_handler, |
1079 | IRQF_TRIGGER_LOW|IRQF_ONESHOT, |
1080 | name: "da9121" , dev: 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(map: chip->regmap, DA9121_REG_SYS_MASK_0, val: mask_all, val_count: 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 | |
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(dev: &i2c->dev, size: 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(client: i2c); |
1133 | |
1134 | ret = da9121_assign_chip_model(i2c, chip); |
1135 | if (ret < 0) |
1136 | goto error; |
1137 | |
1138 | ret = regmap_bulk_write(map: chip->regmap, DA9121_REG_SYS_MASK_0, val: mask_all, val_count: 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 | |
1154 | static void da9121_i2c_remove(struct i2c_client *i2c) |
1155 | { |
1156 | struct da9121 *chip = i2c_get_clientdata(client: 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(dwork: &chip->work); |
1162 | |
1163 | ret = regmap_bulk_write(map: chip->regmap, DA9121_REG_SYS_MASK_0, val: mask_all, val_count: 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_LICENSE("GPL v2" ); |
1196 | |