1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright 2020 NXP.
4 * NXP PCA9450 pmic driver
5 */
6
7 #include <linux/err.h>
8 #include <linux/gpio/consumer.h>
9 #include <linux/i2c.h>
10 #include <linux/interrupt.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/platform_device.h>
15 #include <linux/regulator/driver.h>
16 #include <linux/regulator/machine.h>
17 #include <linux/regulator/of_regulator.h>
18 #include <linux/regulator/pca9450.h>
19
20 struct pc9450_dvs_config {
21 unsigned int run_reg; /* dvs0 */
22 unsigned int run_mask;
23 unsigned int standby_reg; /* dvs1 */
24 unsigned int standby_mask;
25 };
26
27 struct pca9450_regulator_desc {
28 struct regulator_desc desc;
29 const struct pc9450_dvs_config dvs;
30 };
31
32 struct pca9450 {
33 struct device *dev;
34 struct regmap *regmap;
35 struct gpio_desc *sd_vsel_gpio;
36 enum pca9450_chip_type type;
37 unsigned int rcnt;
38 int irq;
39 };
40
41 static const struct regmap_range pca9450_status_range = {
42 .range_min = PCA9450_REG_INT1,
43 .range_max = PCA9450_REG_PWRON_STAT,
44 };
45
46 static const struct regmap_access_table pca9450_volatile_regs = {
47 .yes_ranges = &pca9450_status_range,
48 .n_yes_ranges = 1,
49 };
50
51 static const struct regmap_config pca9450_regmap_config = {
52 .reg_bits = 8,
53 .val_bits = 8,
54 .volatile_table = &pca9450_volatile_regs,
55 .max_register = PCA9450_MAX_REGISTER - 1,
56 .cache_type = REGCACHE_RBTREE,
57 };
58
59 /*
60 * BUCK1/2/3
61 * BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
62 * 00: 25mV/1usec
63 * 01: 25mV/2usec
64 * 10: 25mV/4usec
65 * 11: 25mV/8usec
66 */
67 static const unsigned int pca9450_dvs_buck_ramp_table[] = {
68 25000, 12500, 6250, 3125
69 };
70
71 static const struct regulator_ops pca9450_dvs_buck_regulator_ops = {
72 .enable = regulator_enable_regmap,
73 .disable = regulator_disable_regmap,
74 .is_enabled = regulator_is_enabled_regmap,
75 .list_voltage = regulator_list_voltage_linear_range,
76 .set_voltage_sel = regulator_set_voltage_sel_regmap,
77 .get_voltage_sel = regulator_get_voltage_sel_regmap,
78 .set_voltage_time_sel = regulator_set_voltage_time_sel,
79 .set_ramp_delay = regulator_set_ramp_delay_regmap,
80 };
81
82 static const struct regulator_ops pca9450_buck_regulator_ops = {
83 .enable = regulator_enable_regmap,
84 .disable = regulator_disable_regmap,
85 .is_enabled = regulator_is_enabled_regmap,
86 .list_voltage = regulator_list_voltage_linear_range,
87 .set_voltage_sel = regulator_set_voltage_sel_regmap,
88 .get_voltage_sel = regulator_get_voltage_sel_regmap,
89 .set_voltage_time_sel = regulator_set_voltage_time_sel,
90 };
91
92 static const struct regulator_ops pca9450_ldo_regulator_ops = {
93 .enable = regulator_enable_regmap,
94 .disable = regulator_disable_regmap,
95 .is_enabled = regulator_is_enabled_regmap,
96 .list_voltage = regulator_list_voltage_linear_range,
97 .set_voltage_sel = regulator_set_voltage_sel_regmap,
98 .get_voltage_sel = regulator_get_voltage_sel_regmap,
99 };
100
101 /*
102 * BUCK1/2/3
103 * 0.60 to 2.1875V (12.5mV step)
104 */
105 static const struct linear_range pca9450_dvs_buck_volts[] = {
106 REGULATOR_LINEAR_RANGE(600000, 0x00, 0x7F, 12500),
107 };
108
109 /*
110 * BUCK4/5/6
111 * 0.6V to 3.4V (25mV step)
112 */
113 static const struct linear_range pca9450_buck_volts[] = {
114 REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
115 REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
116 };
117
118 /*
119 * LDO1
120 * 1.6 to 3.3V ()
121 */
122 static const struct linear_range pca9450_ldo1_volts[] = {
123 REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
124 REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
125 };
126
127 /*
128 * LDO2
129 * 0.8 to 1.15V (50mV step)
130 */
131 static const struct linear_range pca9450_ldo2_volts[] = {
132 REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
133 };
134
135 /*
136 * LDO3/4
137 * 0.8 to 3.3V (100mV step)
138 */
139 static const struct linear_range pca9450_ldo34_volts[] = {
140 REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
141 REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
142 };
143
144 /*
145 * LDO5
146 * 1.8 to 3.3V (100mV step)
147 */
148 static const struct linear_range pca9450_ldo5_volts[] = {
149 REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
150 };
151
buck_set_dvs(const struct regulator_desc * desc,struct device_node * np,struct regmap * regmap,char * prop,unsigned int reg,unsigned int mask)152 static int buck_set_dvs(const struct regulator_desc *desc,
153 struct device_node *np, struct regmap *regmap,
154 char *prop, unsigned int reg, unsigned int mask)
155 {
156 int ret, i;
157 uint32_t uv;
158
159 ret = of_property_read_u32(np, prop, &uv);
160 if (ret == -EINVAL)
161 return 0;
162 else if (ret)
163 return ret;
164
165 for (i = 0; i < desc->n_voltages; i++) {
166 ret = regulator_desc_list_voltage_linear_range(desc, i);
167 if (ret < 0)
168 continue;
169 if (ret == uv) {
170 i <<= ffs(desc->vsel_mask) - 1;
171 ret = regmap_update_bits(regmap, reg, mask, i);
172 break;
173 }
174 }
175
176 if (ret == 0) {
177 struct pca9450_regulator_desc *regulator = container_of(desc,
178 struct pca9450_regulator_desc, desc);
179
180 /* Enable DVS control through PMIC_STBY_REQ for this BUCK */
181 ret = regmap_update_bits(regmap, regulator->desc.enable_reg,
182 BUCK1_DVS_CTRL, BUCK1_DVS_CTRL);
183 }
184 return ret;
185 }
186
pca9450_set_dvs_levels(struct device_node * np,const struct regulator_desc * desc,struct regulator_config * cfg)187 static int pca9450_set_dvs_levels(struct device_node *np,
188 const struct regulator_desc *desc,
189 struct regulator_config *cfg)
190 {
191 struct pca9450_regulator_desc *data = container_of(desc,
192 struct pca9450_regulator_desc, desc);
193 const struct pc9450_dvs_config *dvs = &data->dvs;
194 unsigned int reg, mask;
195 char *prop;
196 int i, ret = 0;
197
198 for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
199 switch (i) {
200 case PCA9450_DVS_LEVEL_RUN:
201 prop = "nxp,dvs-run-voltage";
202 reg = dvs->run_reg;
203 mask = dvs->run_mask;
204 break;
205 case PCA9450_DVS_LEVEL_STANDBY:
206 prop = "nxp,dvs-standby-voltage";
207 reg = dvs->standby_reg;
208 mask = dvs->standby_mask;
209 break;
210 default:
211 return -EINVAL;
212 }
213
214 ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
215 if (ret)
216 break;
217 }
218
219 return ret;
220 }
221
222 static const struct pca9450_regulator_desc pca9450a_regulators[] = {
223 {
224 .desc = {
225 .name = "buck1",
226 .of_match = of_match_ptr("BUCK1"),
227 .regulators_node = of_match_ptr("regulators"),
228 .id = PCA9450_BUCK1,
229 .ops = &pca9450_dvs_buck_regulator_ops,
230 .type = REGULATOR_VOLTAGE,
231 .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
232 .linear_ranges = pca9450_dvs_buck_volts,
233 .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
234 .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
235 .vsel_mask = BUCK1OUT_DVS0_MASK,
236 .enable_reg = PCA9450_REG_BUCK1CTRL,
237 .enable_mask = BUCK1_ENMODE_MASK,
238 .ramp_reg = PCA9450_REG_BUCK1CTRL,
239 .ramp_mask = BUCK1_RAMP_MASK,
240 .ramp_delay_table = pca9450_dvs_buck_ramp_table,
241 .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
242 .owner = THIS_MODULE,
243 .of_parse_cb = pca9450_set_dvs_levels,
244 },
245 .dvs = {
246 .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
247 .run_mask = BUCK1OUT_DVS0_MASK,
248 .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
249 .standby_mask = BUCK1OUT_DVS1_MASK,
250 },
251 },
252 {
253 .desc = {
254 .name = "buck2",
255 .of_match = of_match_ptr("BUCK2"),
256 .regulators_node = of_match_ptr("regulators"),
257 .id = PCA9450_BUCK2,
258 .ops = &pca9450_dvs_buck_regulator_ops,
259 .type = REGULATOR_VOLTAGE,
260 .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
261 .linear_ranges = pca9450_dvs_buck_volts,
262 .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
263 .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
264 .vsel_mask = BUCK2OUT_DVS0_MASK,
265 .enable_reg = PCA9450_REG_BUCK2CTRL,
266 .enable_mask = BUCK2_ENMODE_MASK,
267 .ramp_reg = PCA9450_REG_BUCK2CTRL,
268 .ramp_mask = BUCK2_RAMP_MASK,
269 .ramp_delay_table = pca9450_dvs_buck_ramp_table,
270 .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
271 .owner = THIS_MODULE,
272 .of_parse_cb = pca9450_set_dvs_levels,
273 },
274 .dvs = {
275 .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
276 .run_mask = BUCK2OUT_DVS0_MASK,
277 .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
278 .standby_mask = BUCK2OUT_DVS1_MASK,
279 },
280 },
281 {
282 .desc = {
283 .name = "buck3",
284 .of_match = of_match_ptr("BUCK3"),
285 .regulators_node = of_match_ptr("regulators"),
286 .id = PCA9450_BUCK3,
287 .ops = &pca9450_dvs_buck_regulator_ops,
288 .type = REGULATOR_VOLTAGE,
289 .n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
290 .linear_ranges = pca9450_dvs_buck_volts,
291 .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
292 .vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
293 .vsel_mask = BUCK3OUT_DVS0_MASK,
294 .enable_reg = PCA9450_REG_BUCK3CTRL,
295 .enable_mask = BUCK3_ENMODE_MASK,
296 .ramp_reg = PCA9450_REG_BUCK3CTRL,
297 .ramp_mask = BUCK3_RAMP_MASK,
298 .ramp_delay_table = pca9450_dvs_buck_ramp_table,
299 .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
300 .owner = THIS_MODULE,
301 .of_parse_cb = pca9450_set_dvs_levels,
302 },
303 .dvs = {
304 .run_reg = PCA9450_REG_BUCK3OUT_DVS0,
305 .run_mask = BUCK3OUT_DVS0_MASK,
306 .standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
307 .standby_mask = BUCK3OUT_DVS1_MASK,
308 },
309 },
310 {
311 .desc = {
312 .name = "buck4",
313 .of_match = of_match_ptr("BUCK4"),
314 .regulators_node = of_match_ptr("regulators"),
315 .id = PCA9450_BUCK4,
316 .ops = &pca9450_buck_regulator_ops,
317 .type = REGULATOR_VOLTAGE,
318 .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
319 .linear_ranges = pca9450_buck_volts,
320 .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
321 .vsel_reg = PCA9450_REG_BUCK4OUT,
322 .vsel_mask = BUCK4OUT_MASK,
323 .enable_reg = PCA9450_REG_BUCK4CTRL,
324 .enable_mask = BUCK4_ENMODE_MASK,
325 .owner = THIS_MODULE,
326 },
327 },
328 {
329 .desc = {
330 .name = "buck5",
331 .of_match = of_match_ptr("BUCK5"),
332 .regulators_node = of_match_ptr("regulators"),
333 .id = PCA9450_BUCK5,
334 .ops = &pca9450_buck_regulator_ops,
335 .type = REGULATOR_VOLTAGE,
336 .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
337 .linear_ranges = pca9450_buck_volts,
338 .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
339 .vsel_reg = PCA9450_REG_BUCK5OUT,
340 .vsel_mask = BUCK5OUT_MASK,
341 .enable_reg = PCA9450_REG_BUCK5CTRL,
342 .enable_mask = BUCK5_ENMODE_MASK,
343 .owner = THIS_MODULE,
344 },
345 },
346 {
347 .desc = {
348 .name = "buck6",
349 .of_match = of_match_ptr("BUCK6"),
350 .regulators_node = of_match_ptr("regulators"),
351 .id = PCA9450_BUCK6,
352 .ops = &pca9450_buck_regulator_ops,
353 .type = REGULATOR_VOLTAGE,
354 .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
355 .linear_ranges = pca9450_buck_volts,
356 .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
357 .vsel_reg = PCA9450_REG_BUCK6OUT,
358 .vsel_mask = BUCK6OUT_MASK,
359 .enable_reg = PCA9450_REG_BUCK6CTRL,
360 .enable_mask = BUCK6_ENMODE_MASK,
361 .owner = THIS_MODULE,
362 },
363 },
364 {
365 .desc = {
366 .name = "ldo1",
367 .of_match = of_match_ptr("LDO1"),
368 .regulators_node = of_match_ptr("regulators"),
369 .id = PCA9450_LDO1,
370 .ops = &pca9450_ldo_regulator_ops,
371 .type = REGULATOR_VOLTAGE,
372 .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
373 .linear_ranges = pca9450_ldo1_volts,
374 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
375 .vsel_reg = PCA9450_REG_LDO1CTRL,
376 .vsel_mask = LDO1OUT_MASK,
377 .enable_reg = PCA9450_REG_LDO1CTRL,
378 .enable_mask = LDO1_EN_MASK,
379 .owner = THIS_MODULE,
380 },
381 },
382 {
383 .desc = {
384 .name = "ldo2",
385 .of_match = of_match_ptr("LDO2"),
386 .regulators_node = of_match_ptr("regulators"),
387 .id = PCA9450_LDO2,
388 .ops = &pca9450_ldo_regulator_ops,
389 .type = REGULATOR_VOLTAGE,
390 .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
391 .linear_ranges = pca9450_ldo2_volts,
392 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
393 .vsel_reg = PCA9450_REG_LDO2CTRL,
394 .vsel_mask = LDO2OUT_MASK,
395 .enable_reg = PCA9450_REG_LDO2CTRL,
396 .enable_mask = LDO2_EN_MASK,
397 .owner = THIS_MODULE,
398 },
399 },
400 {
401 .desc = {
402 .name = "ldo3",
403 .of_match = of_match_ptr("LDO3"),
404 .regulators_node = of_match_ptr("regulators"),
405 .id = PCA9450_LDO3,
406 .ops = &pca9450_ldo_regulator_ops,
407 .type = REGULATOR_VOLTAGE,
408 .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
409 .linear_ranges = pca9450_ldo34_volts,
410 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
411 .vsel_reg = PCA9450_REG_LDO3CTRL,
412 .vsel_mask = LDO3OUT_MASK,
413 .enable_reg = PCA9450_REG_LDO3CTRL,
414 .enable_mask = LDO3_EN_MASK,
415 .owner = THIS_MODULE,
416 },
417 },
418 {
419 .desc = {
420 .name = "ldo4",
421 .of_match = of_match_ptr("LDO4"),
422 .regulators_node = of_match_ptr("regulators"),
423 .id = PCA9450_LDO4,
424 .ops = &pca9450_ldo_regulator_ops,
425 .type = REGULATOR_VOLTAGE,
426 .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
427 .linear_ranges = pca9450_ldo34_volts,
428 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
429 .vsel_reg = PCA9450_REG_LDO4CTRL,
430 .vsel_mask = LDO4OUT_MASK,
431 .enable_reg = PCA9450_REG_LDO4CTRL,
432 .enable_mask = LDO4_EN_MASK,
433 .owner = THIS_MODULE,
434 },
435 },
436 {
437 .desc = {
438 .name = "ldo5",
439 .of_match = of_match_ptr("LDO5"),
440 .regulators_node = of_match_ptr("regulators"),
441 .id = PCA9450_LDO5,
442 .ops = &pca9450_ldo_regulator_ops,
443 .type = REGULATOR_VOLTAGE,
444 .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
445 .linear_ranges = pca9450_ldo5_volts,
446 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
447 .vsel_reg = PCA9450_REG_LDO5CTRL_H,
448 .vsel_mask = LDO5HOUT_MASK,
449 .enable_reg = PCA9450_REG_LDO5CTRL_H,
450 .enable_mask = LDO5H_EN_MASK,
451 .owner = THIS_MODULE,
452 },
453 },
454 };
455
456 /*
457 * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
458 * on PCA9450C as no Buck3.
459 */
460 static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
461 {
462 .desc = {
463 .name = "buck1",
464 .of_match = of_match_ptr("BUCK1"),
465 .regulators_node = of_match_ptr("regulators"),
466 .id = PCA9450_BUCK1,
467 .ops = &pca9450_dvs_buck_regulator_ops,
468 .type = REGULATOR_VOLTAGE,
469 .n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
470 .linear_ranges = pca9450_dvs_buck_volts,
471 .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
472 .vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
473 .vsel_mask = BUCK1OUT_DVS0_MASK,
474 .enable_reg = PCA9450_REG_BUCK1CTRL,
475 .enable_mask = BUCK1_ENMODE_MASK,
476 .ramp_reg = PCA9450_REG_BUCK1CTRL,
477 .ramp_mask = BUCK1_RAMP_MASK,
478 .ramp_delay_table = pca9450_dvs_buck_ramp_table,
479 .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
480 .owner = THIS_MODULE,
481 .of_parse_cb = pca9450_set_dvs_levels,
482 },
483 .dvs = {
484 .run_reg = PCA9450_REG_BUCK1OUT_DVS0,
485 .run_mask = BUCK1OUT_DVS0_MASK,
486 .standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
487 .standby_mask = BUCK1OUT_DVS1_MASK,
488 },
489 },
490 {
491 .desc = {
492 .name = "buck2",
493 .of_match = of_match_ptr("BUCK2"),
494 .regulators_node = of_match_ptr("regulators"),
495 .id = PCA9450_BUCK2,
496 .ops = &pca9450_dvs_buck_regulator_ops,
497 .type = REGULATOR_VOLTAGE,
498 .n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
499 .linear_ranges = pca9450_dvs_buck_volts,
500 .n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
501 .vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
502 .vsel_mask = BUCK2OUT_DVS0_MASK,
503 .enable_reg = PCA9450_REG_BUCK2CTRL,
504 .enable_mask = BUCK2_ENMODE_MASK,
505 .ramp_reg = PCA9450_REG_BUCK2CTRL,
506 .ramp_mask = BUCK2_RAMP_MASK,
507 .ramp_delay_table = pca9450_dvs_buck_ramp_table,
508 .n_ramp_values = ARRAY_SIZE(pca9450_dvs_buck_ramp_table),
509 .owner = THIS_MODULE,
510 .of_parse_cb = pca9450_set_dvs_levels,
511 },
512 .dvs = {
513 .run_reg = PCA9450_REG_BUCK2OUT_DVS0,
514 .run_mask = BUCK2OUT_DVS0_MASK,
515 .standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
516 .standby_mask = BUCK2OUT_DVS1_MASK,
517 },
518 },
519 {
520 .desc = {
521 .name = "buck4",
522 .of_match = of_match_ptr("BUCK4"),
523 .regulators_node = of_match_ptr("regulators"),
524 .id = PCA9450_BUCK4,
525 .ops = &pca9450_buck_regulator_ops,
526 .type = REGULATOR_VOLTAGE,
527 .n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
528 .linear_ranges = pca9450_buck_volts,
529 .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
530 .vsel_reg = PCA9450_REG_BUCK4OUT,
531 .vsel_mask = BUCK4OUT_MASK,
532 .enable_reg = PCA9450_REG_BUCK4CTRL,
533 .enable_mask = BUCK4_ENMODE_MASK,
534 .owner = THIS_MODULE,
535 },
536 },
537 {
538 .desc = {
539 .name = "buck5",
540 .of_match = of_match_ptr("BUCK5"),
541 .regulators_node = of_match_ptr("regulators"),
542 .id = PCA9450_BUCK5,
543 .ops = &pca9450_buck_regulator_ops,
544 .type = REGULATOR_VOLTAGE,
545 .n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
546 .linear_ranges = pca9450_buck_volts,
547 .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
548 .vsel_reg = PCA9450_REG_BUCK5OUT,
549 .vsel_mask = BUCK5OUT_MASK,
550 .enable_reg = PCA9450_REG_BUCK5CTRL,
551 .enable_mask = BUCK5_ENMODE_MASK,
552 .owner = THIS_MODULE,
553 },
554 },
555 {
556 .desc = {
557 .name = "buck6",
558 .of_match = of_match_ptr("BUCK6"),
559 .regulators_node = of_match_ptr("regulators"),
560 .id = PCA9450_BUCK6,
561 .ops = &pca9450_buck_regulator_ops,
562 .type = REGULATOR_VOLTAGE,
563 .n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
564 .linear_ranges = pca9450_buck_volts,
565 .n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
566 .vsel_reg = PCA9450_REG_BUCK6OUT,
567 .vsel_mask = BUCK6OUT_MASK,
568 .enable_reg = PCA9450_REG_BUCK6CTRL,
569 .enable_mask = BUCK6_ENMODE_MASK,
570 .owner = THIS_MODULE,
571 },
572 },
573 {
574 .desc = {
575 .name = "ldo1",
576 .of_match = of_match_ptr("LDO1"),
577 .regulators_node = of_match_ptr("regulators"),
578 .id = PCA9450_LDO1,
579 .ops = &pca9450_ldo_regulator_ops,
580 .type = REGULATOR_VOLTAGE,
581 .n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
582 .linear_ranges = pca9450_ldo1_volts,
583 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
584 .vsel_reg = PCA9450_REG_LDO1CTRL,
585 .vsel_mask = LDO1OUT_MASK,
586 .enable_reg = PCA9450_REG_LDO1CTRL,
587 .enable_mask = LDO1_EN_MASK,
588 .owner = THIS_MODULE,
589 },
590 },
591 {
592 .desc = {
593 .name = "ldo2",
594 .of_match = of_match_ptr("LDO2"),
595 .regulators_node = of_match_ptr("regulators"),
596 .id = PCA9450_LDO2,
597 .ops = &pca9450_ldo_regulator_ops,
598 .type = REGULATOR_VOLTAGE,
599 .n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
600 .linear_ranges = pca9450_ldo2_volts,
601 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
602 .vsel_reg = PCA9450_REG_LDO2CTRL,
603 .vsel_mask = LDO2OUT_MASK,
604 .enable_reg = PCA9450_REG_LDO2CTRL,
605 .enable_mask = LDO2_EN_MASK,
606 .owner = THIS_MODULE,
607 },
608 },
609 {
610 .desc = {
611 .name = "ldo3",
612 .of_match = of_match_ptr("LDO3"),
613 .regulators_node = of_match_ptr("regulators"),
614 .id = PCA9450_LDO3,
615 .ops = &pca9450_ldo_regulator_ops,
616 .type = REGULATOR_VOLTAGE,
617 .n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
618 .linear_ranges = pca9450_ldo34_volts,
619 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
620 .vsel_reg = PCA9450_REG_LDO3CTRL,
621 .vsel_mask = LDO3OUT_MASK,
622 .enable_reg = PCA9450_REG_LDO3CTRL,
623 .enable_mask = LDO3_EN_MASK,
624 .owner = THIS_MODULE,
625 },
626 },
627 {
628 .desc = {
629 .name = "ldo4",
630 .of_match = of_match_ptr("LDO4"),
631 .regulators_node = of_match_ptr("regulators"),
632 .id = PCA9450_LDO4,
633 .ops = &pca9450_ldo_regulator_ops,
634 .type = REGULATOR_VOLTAGE,
635 .n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
636 .linear_ranges = pca9450_ldo34_volts,
637 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
638 .vsel_reg = PCA9450_REG_LDO4CTRL,
639 .vsel_mask = LDO4OUT_MASK,
640 .enable_reg = PCA9450_REG_LDO4CTRL,
641 .enable_mask = LDO4_EN_MASK,
642 .owner = THIS_MODULE,
643 },
644 },
645 {
646 .desc = {
647 .name = "ldo5",
648 .of_match = of_match_ptr("LDO5"),
649 .regulators_node = of_match_ptr("regulators"),
650 .id = PCA9450_LDO5,
651 .ops = &pca9450_ldo_regulator_ops,
652 .type = REGULATOR_VOLTAGE,
653 .n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
654 .linear_ranges = pca9450_ldo5_volts,
655 .n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
656 .vsel_reg = PCA9450_REG_LDO5CTRL_H,
657 .vsel_mask = LDO5HOUT_MASK,
658 .enable_reg = PCA9450_REG_LDO5CTRL_H,
659 .enable_mask = LDO5H_EN_MASK,
660 .owner = THIS_MODULE,
661 },
662 },
663 };
664
pca9450_irq_handler(int irq,void * data)665 static irqreturn_t pca9450_irq_handler(int irq, void *data)
666 {
667 struct pca9450 *pca9450 = data;
668 struct regmap *regmap = pca9450->regmap;
669 unsigned int status;
670 int ret;
671
672 ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
673 if (ret < 0) {
674 dev_err(pca9450->dev,
675 "Failed to read INT1(%d)\n", ret);
676 return IRQ_NONE;
677 }
678
679 if (status & IRQ_PWRON)
680 dev_warn(pca9450->dev, "PWRON interrupt.\n");
681
682 if (status & IRQ_WDOGB)
683 dev_warn(pca9450->dev, "WDOGB interrupt.\n");
684
685 if (status & IRQ_VR_FLT1)
686 dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
687
688 if (status & IRQ_VR_FLT2)
689 dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
690
691 if (status & IRQ_LOWVSYS)
692 dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
693
694 if (status & IRQ_THERM_105)
695 dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
696
697 if (status & IRQ_THERM_125)
698 dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
699
700 return IRQ_HANDLED;
701 }
702
pca9450_i2c_probe(struct i2c_client * i2c)703 static int pca9450_i2c_probe(struct i2c_client *i2c)
704 {
705 enum pca9450_chip_type type = (unsigned int)(uintptr_t)
706 of_device_get_match_data(&i2c->dev);
707 const struct pca9450_regulator_desc *regulator_desc;
708 struct regulator_config config = { };
709 struct pca9450 *pca9450;
710 unsigned int device_id, i;
711 unsigned int reset_ctrl;
712 int ret;
713
714 if (!i2c->irq) {
715 dev_err(&i2c->dev, "No IRQ configured?\n");
716 return -EINVAL;
717 }
718
719 pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
720 if (!pca9450)
721 return -ENOMEM;
722
723 switch (type) {
724 case PCA9450_TYPE_PCA9450A:
725 regulator_desc = pca9450a_regulators;
726 pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
727 break;
728 case PCA9450_TYPE_PCA9450BC:
729 regulator_desc = pca9450bc_regulators;
730 pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
731 break;
732 default:
733 dev_err(&i2c->dev, "Unknown device type");
734 return -EINVAL;
735 }
736
737 pca9450->irq = i2c->irq;
738 pca9450->type = type;
739 pca9450->dev = &i2c->dev;
740
741 dev_set_drvdata(&i2c->dev, pca9450);
742
743 pca9450->regmap = devm_regmap_init_i2c(i2c,
744 &pca9450_regmap_config);
745 if (IS_ERR(pca9450->regmap)) {
746 dev_err(&i2c->dev, "regmap initialization failed\n");
747 return PTR_ERR(pca9450->regmap);
748 }
749
750 ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
751 if (ret) {
752 dev_err(&i2c->dev, "Read device id error\n");
753 return ret;
754 }
755
756 /* Check your board and dts for match the right pmic */
757 if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
758 ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
759 dev_err(&i2c->dev, "Device id(%x) mismatched\n",
760 device_id >> 4);
761 return -EINVAL;
762 }
763
764 for (i = 0; i < pca9450->rcnt; i++) {
765 const struct regulator_desc *desc;
766 struct regulator_dev *rdev;
767 const struct pca9450_regulator_desc *r;
768
769 r = ®ulator_desc[i];
770 desc = &r->desc;
771
772 config.regmap = pca9450->regmap;
773 config.dev = pca9450->dev;
774
775 rdev = devm_regulator_register(pca9450->dev, desc, &config);
776 if (IS_ERR(rdev)) {
777 ret = PTR_ERR(rdev);
778 dev_err(pca9450->dev,
779 "Failed to register regulator(%s): %d\n",
780 desc->name, ret);
781 return ret;
782 }
783 }
784
785 ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
786 pca9450_irq_handler,
787 (IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
788 "pca9450-irq", pca9450);
789 if (ret != 0) {
790 dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
791 pca9450->irq);
792 return ret;
793 }
794 /* Unmask all interrupt except PWRON/WDOG/RSVD */
795 ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
796 IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
797 IRQ_THERM_105 | IRQ_THERM_125,
798 IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
799 if (ret) {
800 dev_err(&i2c->dev, "Unmask irq error\n");
801 return ret;
802 }
803
804 /* Clear PRESET_EN bit in BUCK123_DVS to use DVS registers */
805 ret = regmap_clear_bits(pca9450->regmap, PCA9450_REG_BUCK123_DVS,
806 BUCK123_PRESET_EN);
807 if (ret) {
808 dev_err(&i2c->dev, "Failed to clear PRESET_EN bit: %d\n", ret);
809 return ret;
810 }
811
812 if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset"))
813 reset_ctrl = WDOG_B_CFG_WARM;
814 else
815 reset_ctrl = WDOG_B_CFG_COLD_LDO12;
816
817 /* Set reset behavior on assertion of WDOG_B signal */
818 ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_RESET_CTRL,
819 WDOG_B_CFG_MASK, reset_ctrl);
820 if (ret) {
821 dev_err(&i2c->dev, "Failed to set WDOG_B reset behavior\n");
822 return ret;
823 }
824
825 if (of_property_read_bool(i2c->dev.of_node, "nxp,i2c-lt-enable")) {
826 /* Enable I2C Level Translator */
827 ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_CONFIG2,
828 I2C_LT_MASK, I2C_LT_ON_STANDBY_RUN);
829 if (ret) {
830 dev_err(&i2c->dev,
831 "Failed to enable I2C level translator\n");
832 return ret;
833 }
834 }
835
836 /*
837 * The driver uses the LDO5CTRL_H register to control the LDO5 regulator.
838 * This is only valid if the SD_VSEL input of the PMIC is high. Let's
839 * check if the pin is available as GPIO and set it to high.
840 */
841 pca9450->sd_vsel_gpio = gpiod_get_optional(pca9450->dev, "sd-vsel", GPIOD_OUT_HIGH);
842
843 if (IS_ERR(pca9450->sd_vsel_gpio)) {
844 dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
845 return PTR_ERR(pca9450->sd_vsel_gpio);
846 }
847
848 dev_info(&i2c->dev, "%s probed.\n",
849 type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
850
851 return 0;
852 }
853
854 static const struct of_device_id pca9450_of_match[] = {
855 {
856 .compatible = "nxp,pca9450a",
857 .data = (void *)PCA9450_TYPE_PCA9450A,
858 },
859 {
860 .compatible = "nxp,pca9450b",
861 .data = (void *)PCA9450_TYPE_PCA9450BC,
862 },
863 {
864 .compatible = "nxp,pca9450c",
865 .data = (void *)PCA9450_TYPE_PCA9450BC,
866 },
867 { }
868 };
869 MODULE_DEVICE_TABLE(of, pca9450_of_match);
870
871 static struct i2c_driver pca9450_i2c_driver = {
872 .driver = {
873 .name = "nxp-pca9450",
874 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
875 .of_match_table = pca9450_of_match,
876 },
877 .probe = pca9450_i2c_probe,
878 };
879
880 module_i2c_driver(pca9450_i2c_driver);
881
882 MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
883 MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
884 MODULE_LICENSE("GPL");
885