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Merge commit v3.13-rc1 into kbuild/misc
[deliverable/linux.git] / drivers / regulator / palmas-regulator.c
1 /*
2 * Driver for Regulator part of Palmas PMIC Chips
3 *
4 * Copyright 2011-2013 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Ian Lartey <ian@slimlogic.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/err.h>
20 #include <linux/platform_device.h>
21 #include <linux/regulator/driver.h>
22 #include <linux/regulator/machine.h>
23 #include <linux/slab.h>
24 #include <linux/regmap.h>
25 #include <linux/mfd/palmas.h>
26 #include <linux/of.h>
27 #include <linux/of_platform.h>
28 #include <linux/regulator/of_regulator.h>
29
30 struct regs_info {
31 char *name;
32 char *sname;
33 u8 vsel_addr;
34 u8 ctrl_addr;
35 u8 tstep_addr;
36 int sleep_id;
37 };
38
39 static const struct regs_info palmas_regs_info[] = {
40 {
41 .name = "SMPS12",
42 .sname = "smps1-in",
43 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
44 .ctrl_addr = PALMAS_SMPS12_CTRL,
45 .tstep_addr = PALMAS_SMPS12_TSTEP,
46 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS12,
47 },
48 {
49 .name = "SMPS123",
50 .sname = "smps1-in",
51 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
52 .ctrl_addr = PALMAS_SMPS12_CTRL,
53 .tstep_addr = PALMAS_SMPS12_TSTEP,
54 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS12,
55 },
56 {
57 .name = "SMPS3",
58 .sname = "smps3-in",
59 .vsel_addr = PALMAS_SMPS3_VOLTAGE,
60 .ctrl_addr = PALMAS_SMPS3_CTRL,
61 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS3,
62 },
63 {
64 .name = "SMPS45",
65 .sname = "smps4-in",
66 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
67 .ctrl_addr = PALMAS_SMPS45_CTRL,
68 .tstep_addr = PALMAS_SMPS45_TSTEP,
69 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS45,
70 },
71 {
72 .name = "SMPS457",
73 .sname = "smps4-in",
74 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
75 .ctrl_addr = PALMAS_SMPS45_CTRL,
76 .tstep_addr = PALMAS_SMPS45_TSTEP,
77 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS45,
78 },
79 {
80 .name = "SMPS6",
81 .sname = "smps6-in",
82 .vsel_addr = PALMAS_SMPS6_VOLTAGE,
83 .ctrl_addr = PALMAS_SMPS6_CTRL,
84 .tstep_addr = PALMAS_SMPS6_TSTEP,
85 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS6,
86 },
87 {
88 .name = "SMPS7",
89 .sname = "smps7-in",
90 .vsel_addr = PALMAS_SMPS7_VOLTAGE,
91 .ctrl_addr = PALMAS_SMPS7_CTRL,
92 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS7,
93 },
94 {
95 .name = "SMPS8",
96 .sname = "smps8-in",
97 .vsel_addr = PALMAS_SMPS8_VOLTAGE,
98 .ctrl_addr = PALMAS_SMPS8_CTRL,
99 .tstep_addr = PALMAS_SMPS8_TSTEP,
100 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS8,
101 },
102 {
103 .name = "SMPS9",
104 .sname = "smps9-in",
105 .vsel_addr = PALMAS_SMPS9_VOLTAGE,
106 .ctrl_addr = PALMAS_SMPS9_CTRL,
107 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS9,
108 },
109 {
110 .name = "SMPS10_OUT2",
111 .sname = "smps10-in",
112 .ctrl_addr = PALMAS_SMPS10_CTRL,
113 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS10,
114 },
115 {
116 .name = "SMPS10_OUT1",
117 .sname = "smps10-out2",
118 .ctrl_addr = PALMAS_SMPS10_CTRL,
119 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SMPS10,
120 },
121 {
122 .name = "LDO1",
123 .sname = "ldo1-in",
124 .vsel_addr = PALMAS_LDO1_VOLTAGE,
125 .ctrl_addr = PALMAS_LDO1_CTRL,
126 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO1,
127 },
128 {
129 .name = "LDO2",
130 .sname = "ldo2-in",
131 .vsel_addr = PALMAS_LDO2_VOLTAGE,
132 .ctrl_addr = PALMAS_LDO2_CTRL,
133 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO2,
134 },
135 {
136 .name = "LDO3",
137 .sname = "ldo3-in",
138 .vsel_addr = PALMAS_LDO3_VOLTAGE,
139 .ctrl_addr = PALMAS_LDO3_CTRL,
140 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO3,
141 },
142 {
143 .name = "LDO4",
144 .sname = "ldo4-in",
145 .vsel_addr = PALMAS_LDO4_VOLTAGE,
146 .ctrl_addr = PALMAS_LDO4_CTRL,
147 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO4,
148 },
149 {
150 .name = "LDO5",
151 .sname = "ldo5-in",
152 .vsel_addr = PALMAS_LDO5_VOLTAGE,
153 .ctrl_addr = PALMAS_LDO5_CTRL,
154 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO5,
155 },
156 {
157 .name = "LDO6",
158 .sname = "ldo6-in",
159 .vsel_addr = PALMAS_LDO6_VOLTAGE,
160 .ctrl_addr = PALMAS_LDO6_CTRL,
161 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO6,
162 },
163 {
164 .name = "LDO7",
165 .sname = "ldo7-in",
166 .vsel_addr = PALMAS_LDO7_VOLTAGE,
167 .ctrl_addr = PALMAS_LDO7_CTRL,
168 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO7,
169 },
170 {
171 .name = "LDO8",
172 .sname = "ldo8-in",
173 .vsel_addr = PALMAS_LDO8_VOLTAGE,
174 .ctrl_addr = PALMAS_LDO8_CTRL,
175 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO8,
176 },
177 {
178 .name = "LDO9",
179 .sname = "ldo9-in",
180 .vsel_addr = PALMAS_LDO9_VOLTAGE,
181 .ctrl_addr = PALMAS_LDO9_CTRL,
182 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDO9,
183 },
184 {
185 .name = "LDOLN",
186 .sname = "ldoln-in",
187 .vsel_addr = PALMAS_LDOLN_VOLTAGE,
188 .ctrl_addr = PALMAS_LDOLN_CTRL,
189 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDOLN,
190 },
191 {
192 .name = "LDOUSB",
193 .sname = "ldousb-in",
194 .vsel_addr = PALMAS_LDOUSB_VOLTAGE,
195 .ctrl_addr = PALMAS_LDOUSB_CTRL,
196 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_LDOUSB,
197 },
198 {
199 .name = "REGEN1",
200 .ctrl_addr = PALMAS_REGEN1_CTRL,
201 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_REGEN1,
202 },
203 {
204 .name = "REGEN2",
205 .ctrl_addr = PALMAS_REGEN2_CTRL,
206 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_REGEN2,
207 },
208 {
209 .name = "REGEN3",
210 .ctrl_addr = PALMAS_REGEN3_CTRL,
211 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_REGEN3,
212 },
213 {
214 .name = "SYSEN1",
215 .ctrl_addr = PALMAS_SYSEN1_CTRL,
216 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SYSEN1,
217 },
218 {
219 .name = "SYSEN2",
220 .ctrl_addr = PALMAS_SYSEN2_CTRL,
221 .sleep_id = PALMAS_EXTERNAL_REQSTR_ID_SYSEN2,
222 },
223 };
224
225 static unsigned int palmas_smps_ramp_delay[4] = {0, 10000, 5000, 2500};
226
227 #define SMPS_CTRL_MODE_OFF 0x00
228 #define SMPS_CTRL_MODE_ON 0x01
229 #define SMPS_CTRL_MODE_ECO 0x02
230 #define SMPS_CTRL_MODE_PWM 0x03
231
232 #define PALMAS_SMPS_NUM_VOLTAGES 122
233 #define PALMAS_SMPS10_NUM_VOLTAGES 2
234 #define PALMAS_LDO_NUM_VOLTAGES 50
235
236 #define SMPS10_VSEL (1<<3)
237 #define SMPS10_BOOST_EN (1<<2)
238 #define SMPS10_BYPASS_EN (1<<1)
239 #define SMPS10_SWITCH_EN (1<<0)
240
241 #define REGULATOR_SLAVE 0
242
243 static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
244 unsigned int *dest)
245 {
246 unsigned int addr;
247
248 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
249
250 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
251 }
252
253 static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
254 unsigned int value)
255 {
256 unsigned int addr;
257
258 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
259
260 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
261 }
262
263 static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
264 unsigned int *dest)
265 {
266 unsigned int addr;
267
268 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
269
270 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
271 }
272
273 static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
274 unsigned int value)
275 {
276 unsigned int addr;
277
278 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
279
280 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
281 }
282
283 static int palmas_is_enabled_smps(struct regulator_dev *dev)
284 {
285 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
286 int id = rdev_get_id(dev);
287 unsigned int reg;
288
289 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
290
291 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
292 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
293
294 return !!(reg);
295 }
296
297 static int palmas_enable_smps(struct regulator_dev *dev)
298 {
299 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
300 int id = rdev_get_id(dev);
301 unsigned int reg;
302
303 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
304
305 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
306 if (pmic->current_reg_mode[id])
307 reg |= pmic->current_reg_mode[id];
308 else
309 reg |= SMPS_CTRL_MODE_ON;
310
311 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
312
313 return 0;
314 }
315
316 static int palmas_disable_smps(struct regulator_dev *dev)
317 {
318 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
319 int id = rdev_get_id(dev);
320 unsigned int reg;
321
322 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
323
324 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
325
326 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
327
328 return 0;
329 }
330
331 static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
332 {
333 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
334 int id = rdev_get_id(dev);
335 unsigned int reg;
336 bool rail_enable = true;
337
338 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
339 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
340
341 if (reg == SMPS_CTRL_MODE_OFF)
342 rail_enable = false;
343
344 switch (mode) {
345 case REGULATOR_MODE_NORMAL:
346 reg |= SMPS_CTRL_MODE_ON;
347 break;
348 case REGULATOR_MODE_IDLE:
349 reg |= SMPS_CTRL_MODE_ECO;
350 break;
351 case REGULATOR_MODE_FAST:
352 reg |= SMPS_CTRL_MODE_PWM;
353 break;
354 default:
355 return -EINVAL;
356 }
357
358 pmic->current_reg_mode[id] = reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
359 if (rail_enable)
360 palmas_smps_write(pmic->palmas,
361 palmas_regs_info[id].ctrl_addr, reg);
362 return 0;
363 }
364
365 static unsigned int palmas_get_mode_smps(struct regulator_dev *dev)
366 {
367 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
368 int id = rdev_get_id(dev);
369 unsigned int reg;
370
371 reg = pmic->current_reg_mode[id] & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
372
373 switch (reg) {
374 case SMPS_CTRL_MODE_ON:
375 return REGULATOR_MODE_NORMAL;
376 case SMPS_CTRL_MODE_ECO:
377 return REGULATOR_MODE_IDLE;
378 case SMPS_CTRL_MODE_PWM:
379 return REGULATOR_MODE_FAST;
380 }
381
382 return 0;
383 }
384
385 static int palmas_list_voltage_smps(struct regulator_dev *dev,
386 unsigned selector)
387 {
388 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
389 int id = rdev_get_id(dev);
390 int mult = 1;
391
392 /* Read the multiplier set in VSEL register to return
393 * the correct voltage.
394 */
395 if (pmic->range[id])
396 mult = 2;
397
398 if (selector == 0)
399 return 0;
400 else if (selector < 6)
401 return 500000 * mult;
402 else
403 /* Voltage is linear mapping starting from selector 6,
404 * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
405 * RANGE is either x1 or x2
406 */
407 return (490000 + ((selector - 5) * 10000)) * mult;
408 }
409
410 static int palmas_map_voltage_smps(struct regulator_dev *rdev,
411 int min_uV, int max_uV)
412 {
413 struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
414 int id = rdev_get_id(rdev);
415 int ret, voltage;
416
417 if (min_uV == 0)
418 return 0;
419
420 if (pmic->range[id]) { /* RANGE is x2 */
421 if (min_uV < 1000000)
422 min_uV = 1000000;
423 ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
424 } else { /* RANGE is x1 */
425 if (min_uV < 500000)
426 min_uV = 500000;
427 ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
428 }
429
430 /* Map back into a voltage to verify we're still in bounds */
431 voltage = palmas_list_voltage_smps(rdev, ret);
432 if (voltage < min_uV || voltage > max_uV)
433 return -EINVAL;
434
435 return ret;
436 }
437
438 static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev,
439 unsigned int old_selector, unsigned int new_selector)
440 {
441 struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
442 int id = rdev_get_id(rdev);
443 int old_uv, new_uv;
444 unsigned int ramp_delay = pmic->ramp_delay[id];
445
446 if (!ramp_delay)
447 return 0;
448
449 old_uv = palmas_list_voltage_smps(rdev, old_selector);
450 if (old_uv < 0)
451 return old_uv;
452
453 new_uv = palmas_list_voltage_smps(rdev, new_selector);
454 if (new_uv < 0)
455 return new_uv;
456
457 return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay);
458 }
459
460 static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev,
461 int ramp_delay)
462 {
463 struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
464 int id = rdev_get_id(rdev);
465 unsigned int reg = 0;
466 unsigned int addr = palmas_regs_info[id].tstep_addr;
467 int ret;
468
469 /* SMPS3 and SMPS7 do not have tstep_addr setting */
470 switch (id) {
471 case PALMAS_REG_SMPS3:
472 case PALMAS_REG_SMPS7:
473 return 0;
474 }
475
476 if (ramp_delay <= 0)
477 reg = 0;
478 else if (ramp_delay <= 2500)
479 reg = 3;
480 else if (ramp_delay <= 5000)
481 reg = 2;
482 else
483 reg = 1;
484
485 ret = palmas_smps_write(pmic->palmas, addr, reg);
486 if (ret < 0) {
487 dev_err(pmic->palmas->dev, "TSTEP write failed: %d\n", ret);
488 return ret;
489 }
490
491 pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg];
492 return ret;
493 }
494
495 static struct regulator_ops palmas_ops_smps = {
496 .is_enabled = palmas_is_enabled_smps,
497 .enable = palmas_enable_smps,
498 .disable = palmas_disable_smps,
499 .set_mode = palmas_set_mode_smps,
500 .get_mode = palmas_get_mode_smps,
501 .get_voltage_sel = regulator_get_voltage_sel_regmap,
502 .set_voltage_sel = regulator_set_voltage_sel_regmap,
503 .list_voltage = palmas_list_voltage_smps,
504 .map_voltage = palmas_map_voltage_smps,
505 .set_voltage_time_sel = palma_smps_set_voltage_smps_time_sel,
506 .set_ramp_delay = palmas_smps_set_ramp_delay,
507 };
508
509 static struct regulator_ops palmas_ops_ext_control_smps = {
510 .set_mode = palmas_set_mode_smps,
511 .get_mode = palmas_get_mode_smps,
512 .get_voltage_sel = regulator_get_voltage_sel_regmap,
513 .set_voltage_sel = regulator_set_voltage_sel_regmap,
514 .list_voltage = palmas_list_voltage_smps,
515 .map_voltage = palmas_map_voltage_smps,
516 .set_voltage_time_sel = palma_smps_set_voltage_smps_time_sel,
517 .set_ramp_delay = palmas_smps_set_ramp_delay,
518 };
519
520 static struct regulator_ops palmas_ops_smps10 = {
521 .is_enabled = regulator_is_enabled_regmap,
522 .enable = regulator_enable_regmap,
523 .disable = regulator_disable_regmap,
524 .get_voltage_sel = regulator_get_voltage_sel_regmap,
525 .set_voltage_sel = regulator_set_voltage_sel_regmap,
526 .list_voltage = regulator_list_voltage_linear,
527 .map_voltage = regulator_map_voltage_linear,
528 .set_bypass = regulator_set_bypass_regmap,
529 .get_bypass = regulator_get_bypass_regmap,
530 };
531
532 static int palmas_is_enabled_ldo(struct regulator_dev *dev)
533 {
534 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
535 int id = rdev_get_id(dev);
536 unsigned int reg;
537
538 palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
539
540 reg &= PALMAS_LDO1_CTRL_STATUS;
541
542 return !!(reg);
543 }
544
545 static struct regulator_ops palmas_ops_ldo = {
546 .is_enabled = palmas_is_enabled_ldo,
547 .enable = regulator_enable_regmap,
548 .disable = regulator_disable_regmap,
549 .get_voltage_sel = regulator_get_voltage_sel_regmap,
550 .set_voltage_sel = regulator_set_voltage_sel_regmap,
551 .list_voltage = regulator_list_voltage_linear,
552 .map_voltage = regulator_map_voltage_linear,
553 };
554
555 static struct regulator_ops palmas_ops_ext_control_ldo = {
556 .get_voltage_sel = regulator_get_voltage_sel_regmap,
557 .set_voltage_sel = regulator_set_voltage_sel_regmap,
558 .list_voltage = regulator_list_voltage_linear,
559 .map_voltage = regulator_map_voltage_linear,
560 };
561
562 static struct regulator_ops palmas_ops_extreg = {
563 .is_enabled = regulator_is_enabled_regmap,
564 .enable = regulator_enable_regmap,
565 .disable = regulator_disable_regmap,
566 };
567
568 static struct regulator_ops palmas_ops_ext_control_extreg = {
569 };
570
571 static int palmas_regulator_config_external(struct palmas *palmas, int id,
572 struct palmas_reg_init *reg_init)
573 {
574 int sleep_id = palmas_regs_info[id].sleep_id;
575 int ret;
576
577 ret = palmas_ext_control_req_config(palmas, sleep_id,
578 reg_init->roof_floor, true);
579 if (ret < 0)
580 dev_err(palmas->dev,
581 "Ext control config for regulator %d failed %d\n",
582 id, ret);
583 return ret;
584 }
585
586 /*
587 * setup the hardware based sleep configuration of the SMPS/LDO regulators
588 * from the platform data. This is different to the software based control
589 * supported by the regulator framework as it is controlled by toggling
590 * pins on the PMIC such as PREQ, SYSEN, ...
591 */
592 static int palmas_smps_init(struct palmas *palmas, int id,
593 struct palmas_reg_init *reg_init)
594 {
595 unsigned int reg;
596 unsigned int addr;
597 int ret;
598
599 addr = palmas_regs_info[id].ctrl_addr;
600
601 ret = palmas_smps_read(palmas, addr, &reg);
602 if (ret)
603 return ret;
604
605 switch (id) {
606 case PALMAS_REG_SMPS10_OUT1:
607 case PALMAS_REG_SMPS10_OUT2:
608 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
609 if (reg_init->mode_sleep)
610 reg |= reg_init->mode_sleep <<
611 PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
612 break;
613 default:
614 if (reg_init->warm_reset)
615 reg |= PALMAS_SMPS12_CTRL_WR_S;
616 else
617 reg &= ~PALMAS_SMPS12_CTRL_WR_S;
618
619 if (reg_init->roof_floor)
620 reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
621 else
622 reg &= ~PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
623
624 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
625 if (reg_init->mode_sleep)
626 reg |= reg_init->mode_sleep <<
627 PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
628 }
629
630 ret = palmas_smps_write(palmas, addr, reg);
631 if (ret)
632 return ret;
633
634 if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
635 addr = palmas_regs_info[id].vsel_addr;
636
637 reg = reg_init->vsel;
638
639 ret = palmas_smps_write(palmas, addr, reg);
640 if (ret)
641 return ret;
642 }
643
644 if (reg_init->roof_floor && (id != PALMAS_REG_SMPS10_OUT1) &&
645 (id != PALMAS_REG_SMPS10_OUT2)) {
646 /* Enable externally controlled regulator */
647 addr = palmas_regs_info[id].ctrl_addr;
648 ret = palmas_smps_read(palmas, addr, &reg);
649 if (ret < 0)
650 return ret;
651
652 if (!(reg & PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK)) {
653 reg |= SMPS_CTRL_MODE_ON;
654 ret = palmas_smps_write(palmas, addr, reg);
655 if (ret < 0)
656 return ret;
657 }
658 return palmas_regulator_config_external(palmas, id, reg_init);
659 }
660 return 0;
661 }
662
663 static int palmas_ldo_init(struct palmas *palmas, int id,
664 struct palmas_reg_init *reg_init)
665 {
666 unsigned int reg;
667 unsigned int addr;
668 int ret;
669
670 addr = palmas_regs_info[id].ctrl_addr;
671
672 ret = palmas_ldo_read(palmas, addr, &reg);
673 if (ret)
674 return ret;
675
676 if (reg_init->warm_reset)
677 reg |= PALMAS_LDO1_CTRL_WR_S;
678 else
679 reg &= ~PALMAS_LDO1_CTRL_WR_S;
680
681 if (reg_init->mode_sleep)
682 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
683 else
684 reg &= ~PALMAS_LDO1_CTRL_MODE_SLEEP;
685
686 ret = palmas_ldo_write(palmas, addr, reg);
687 if (ret)
688 return ret;
689
690 if (reg_init->roof_floor) {
691 /* Enable externally controlled regulator */
692 addr = palmas_regs_info[id].ctrl_addr;
693 ret = palmas_update_bits(palmas, PALMAS_LDO_BASE,
694 addr, PALMAS_LDO1_CTRL_MODE_ACTIVE,
695 PALMAS_LDO1_CTRL_MODE_ACTIVE);
696 if (ret < 0) {
697 dev_err(palmas->dev,
698 "LDO Register 0x%02x update failed %d\n",
699 addr, ret);
700 return ret;
701 }
702 return palmas_regulator_config_external(palmas, id, reg_init);
703 }
704 return 0;
705 }
706
707 static int palmas_extreg_init(struct palmas *palmas, int id,
708 struct palmas_reg_init *reg_init)
709 {
710 unsigned int addr;
711 int ret;
712 unsigned int val = 0;
713
714 addr = palmas_regs_info[id].ctrl_addr;
715
716 if (reg_init->mode_sleep)
717 val = PALMAS_REGEN1_CTRL_MODE_SLEEP;
718
719 ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
720 addr, PALMAS_REGEN1_CTRL_MODE_SLEEP, val);
721 if (ret < 0) {
722 dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
723 addr, ret);
724 return ret;
725 }
726
727 if (reg_init->roof_floor) {
728 /* Enable externally controlled regulator */
729 addr = palmas_regs_info[id].ctrl_addr;
730 ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
731 addr, PALMAS_REGEN1_CTRL_MODE_ACTIVE,
732 PALMAS_REGEN1_CTRL_MODE_ACTIVE);
733 if (ret < 0) {
734 dev_err(palmas->dev,
735 "Resource Register 0x%02x update failed %d\n",
736 addr, ret);
737 return ret;
738 }
739 return palmas_regulator_config_external(palmas, id, reg_init);
740 }
741 return 0;
742 }
743
744 static void palmas_enable_ldo8_track(struct palmas *palmas)
745 {
746 unsigned int reg;
747 unsigned int addr;
748 int ret;
749
750 addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr;
751
752 ret = palmas_ldo_read(palmas, addr, &reg);
753 if (ret) {
754 dev_err(palmas->dev, "Error in reading ldo8 control reg\n");
755 return;
756 }
757
758 reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN;
759 ret = palmas_ldo_write(palmas, addr, reg);
760 if (ret < 0) {
761 dev_err(palmas->dev, "Error in enabling tracking mode\n");
762 return;
763 }
764 /*
765 * When SMPS45 is set to off and LDO8 tracking is enabled, the LDO8
766 * output is defined by the LDO8_VOLTAGE.VSEL register divided by two,
767 * and can be set from 0.45 to 1.65 V.
768 */
769 addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr;
770 ret = palmas_ldo_read(palmas, addr, &reg);
771 if (ret) {
772 dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n");
773 return;
774 }
775
776 reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK;
777 ret = palmas_ldo_write(palmas, addr, reg);
778 if (ret < 0)
779 dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n");
780
781 return;
782 }
783
784 static struct of_regulator_match palmas_matches[] = {
785 { .name = "smps12", },
786 { .name = "smps123", },
787 { .name = "smps3", },
788 { .name = "smps45", },
789 { .name = "smps457", },
790 { .name = "smps6", },
791 { .name = "smps7", },
792 { .name = "smps8", },
793 { .name = "smps9", },
794 { .name = "smps10_out2", },
795 { .name = "smps10_out1", },
796 { .name = "ldo1", },
797 { .name = "ldo2", },
798 { .name = "ldo3", },
799 { .name = "ldo4", },
800 { .name = "ldo5", },
801 { .name = "ldo6", },
802 { .name = "ldo7", },
803 { .name = "ldo8", },
804 { .name = "ldo9", },
805 { .name = "ldoln", },
806 { .name = "ldousb", },
807 { .name = "regen1", },
808 { .name = "regen2", },
809 { .name = "regen3", },
810 { .name = "sysen1", },
811 { .name = "sysen2", },
812 };
813
814 static void palmas_dt_to_pdata(struct device *dev,
815 struct device_node *node,
816 struct palmas_pmic_platform_data *pdata)
817 {
818 struct device_node *regulators;
819 u32 prop;
820 int idx, ret;
821
822 node = of_node_get(node);
823 regulators = of_get_child_by_name(node, "regulators");
824 if (!regulators) {
825 dev_info(dev, "regulator node not found\n");
826 return;
827 }
828
829 ret = of_regulator_match(dev, regulators, palmas_matches,
830 PALMAS_NUM_REGS);
831 of_node_put(regulators);
832 if (ret < 0) {
833 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
834 return;
835 }
836
837 for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
838 if (!palmas_matches[idx].init_data ||
839 !palmas_matches[idx].of_node)
840 continue;
841
842 pdata->reg_data[idx] = palmas_matches[idx].init_data;
843
844 pdata->reg_init[idx] = devm_kzalloc(dev,
845 sizeof(struct palmas_reg_init), GFP_KERNEL);
846
847 pdata->reg_init[idx]->warm_reset =
848 of_property_read_bool(palmas_matches[idx].of_node,
849 "ti,warm-reset");
850
851 ret = of_property_read_u32(palmas_matches[idx].of_node,
852 "ti,roof-floor", &prop);
853 /* EINVAL: Property not found */
854 if (ret != -EINVAL) {
855 int econtrol;
856
857 /* use default value, when no value is specified */
858 econtrol = PALMAS_EXT_CONTROL_NSLEEP;
859 if (!ret) {
860 switch (prop) {
861 case 1:
862 econtrol = PALMAS_EXT_CONTROL_ENABLE1;
863 break;
864 case 2:
865 econtrol = PALMAS_EXT_CONTROL_ENABLE2;
866 break;
867 case 3:
868 econtrol = PALMAS_EXT_CONTROL_NSLEEP;
869 break;
870 default:
871 WARN_ON(1);
872 dev_warn(dev,
873 "%s: Invalid roof-floor option: %u\n",
874 palmas_matches[idx].name, prop);
875 break;
876 }
877 }
878 pdata->reg_init[idx]->roof_floor = econtrol;
879 }
880
881 ret = of_property_read_u32(palmas_matches[idx].of_node,
882 "ti,mode-sleep", &prop);
883 if (!ret)
884 pdata->reg_init[idx]->mode_sleep = prop;
885
886 ret = of_property_read_bool(palmas_matches[idx].of_node,
887 "ti,smps-range");
888 if (ret)
889 pdata->reg_init[idx]->vsel =
890 PALMAS_SMPS12_VOLTAGE_RANGE;
891
892 if (idx == PALMAS_REG_LDO8)
893 pdata->enable_ldo8_tracking = of_property_read_bool(
894 palmas_matches[idx].of_node,
895 "ti,enable-ldo8-tracking");
896 }
897
898 pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
899 }
900
901
902 static int palmas_regulators_probe(struct platform_device *pdev)
903 {
904 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
905 struct palmas_pmic_platform_data *pdata = dev_get_platdata(&pdev->dev);
906 struct device_node *node = pdev->dev.of_node;
907 struct regulator_dev *rdev;
908 struct regulator_config config = { };
909 struct palmas_pmic *pmic;
910 struct palmas_reg_init *reg_init;
911 int id = 0, ret;
912 unsigned int addr, reg;
913
914 if (node && !pdata) {
915 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
916
917 if (!pdata)
918 return -ENOMEM;
919
920 palmas_dt_to_pdata(&pdev->dev, node, pdata);
921 }
922
923 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
924 if (!pmic)
925 return -ENOMEM;
926
927 pmic->dev = &pdev->dev;
928 pmic->palmas = palmas;
929 palmas->pmic = pmic;
930 platform_set_drvdata(pdev, pmic);
931
932 ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
933 if (ret)
934 return ret;
935
936 if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
937 pmic->smps123 = 1;
938
939 if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
940 pmic->smps457 = 1;
941
942 config.regmap = palmas->regmap[REGULATOR_SLAVE];
943 config.dev = &pdev->dev;
944 config.driver_data = pmic;
945
946 for (id = 0; id < PALMAS_REG_LDO1; id++) {
947 bool ramp_delay_support = false;
948
949 /*
950 * Miss out regulators which are not available due
951 * to slaving configurations.
952 */
953 switch (id) {
954 case PALMAS_REG_SMPS12:
955 case PALMAS_REG_SMPS3:
956 if (pmic->smps123)
957 continue;
958 if (id == PALMAS_REG_SMPS12)
959 ramp_delay_support = true;
960 break;
961 case PALMAS_REG_SMPS123:
962 if (!pmic->smps123)
963 continue;
964 ramp_delay_support = true;
965 break;
966 case PALMAS_REG_SMPS45:
967 case PALMAS_REG_SMPS7:
968 if (pmic->smps457)
969 continue;
970 if (id == PALMAS_REG_SMPS45)
971 ramp_delay_support = true;
972 break;
973 case PALMAS_REG_SMPS457:
974 if (!pmic->smps457)
975 continue;
976 ramp_delay_support = true;
977 break;
978 case PALMAS_REG_SMPS10_OUT1:
979 case PALMAS_REG_SMPS10_OUT2:
980 if (!PALMAS_PMIC_HAS(palmas, SMPS10_BOOST))
981 continue;
982 }
983
984 if ((id == PALMAS_REG_SMPS6) || (id == PALMAS_REG_SMPS8))
985 ramp_delay_support = true;
986
987 if (ramp_delay_support) {
988 addr = palmas_regs_info[id].tstep_addr;
989 ret = palmas_smps_read(pmic->palmas, addr, &reg);
990 if (ret < 0) {
991 dev_err(&pdev->dev,
992 "reading TSTEP reg failed: %d\n", ret);
993 return ret;
994 }
995 pmic->desc[id].ramp_delay =
996 palmas_smps_ramp_delay[reg & 0x3];
997 pmic->ramp_delay[id] = pmic->desc[id].ramp_delay;
998 }
999
1000 /* Initialise sleep/init values from platform data */
1001 if (pdata && pdata->reg_init[id]) {
1002 reg_init = pdata->reg_init[id];
1003 ret = palmas_smps_init(palmas, id, reg_init);
1004 if (ret)
1005 return ret;
1006 } else {
1007 reg_init = NULL;
1008 }
1009
1010 /* Register the regulators */
1011 pmic->desc[id].name = palmas_regs_info[id].name;
1012 pmic->desc[id].id = id;
1013
1014 switch (id) {
1015 case PALMAS_REG_SMPS10_OUT1:
1016 case PALMAS_REG_SMPS10_OUT2:
1017 pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
1018 pmic->desc[id].ops = &palmas_ops_smps10;
1019 pmic->desc[id].vsel_reg =
1020 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
1021 PALMAS_SMPS10_CTRL);
1022 pmic->desc[id].vsel_mask = SMPS10_VSEL;
1023 pmic->desc[id].enable_reg =
1024 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
1025 PALMAS_SMPS10_CTRL);
1026 if (id == PALMAS_REG_SMPS10_OUT1)
1027 pmic->desc[id].enable_mask = SMPS10_SWITCH_EN;
1028 else
1029 pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
1030 pmic->desc[id].bypass_reg =
1031 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
1032 PALMAS_SMPS10_CTRL);
1033 pmic->desc[id].bypass_mask = SMPS10_BYPASS_EN;
1034 pmic->desc[id].min_uV = 3750000;
1035 pmic->desc[id].uV_step = 1250000;
1036 break;
1037 default:
1038 /*
1039 * Read and store the RANGE bit for later use
1040 * This must be done before regulator is probed,
1041 * otherwise we error in probe with unsupportable
1042 * ranges. Read the current smps mode for later use.
1043 */
1044 addr = palmas_regs_info[id].vsel_addr;
1045
1046 ret = palmas_smps_read(pmic->palmas, addr, &reg);
1047 if (ret)
1048 return ret;
1049 if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
1050 pmic->range[id] = 1;
1051
1052 if (reg_init && reg_init->roof_floor)
1053 pmic->desc[id].ops =
1054 &palmas_ops_ext_control_smps;
1055 else
1056 pmic->desc[id].ops = &palmas_ops_smps;
1057 pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
1058 pmic->desc[id].vsel_reg =
1059 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
1060 palmas_regs_info[id].vsel_addr);
1061 pmic->desc[id].vsel_mask =
1062 PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
1063
1064 /* Read the smps mode for later use. */
1065 addr = palmas_regs_info[id].ctrl_addr;
1066 ret = palmas_smps_read(pmic->palmas, addr, &reg);
1067 if (ret)
1068 return ret;
1069 pmic->current_reg_mode[id] = reg &
1070 PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
1071 }
1072
1073 pmic->desc[id].type = REGULATOR_VOLTAGE;
1074 pmic->desc[id].owner = THIS_MODULE;
1075
1076 if (pdata)
1077 config.init_data = pdata->reg_data[id];
1078 else
1079 config.init_data = NULL;
1080
1081 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
1082 config.of_node = palmas_matches[id].of_node;
1083
1084 rdev = devm_regulator_register(&pdev->dev, &pmic->desc[id],
1085 &config);
1086 if (IS_ERR(rdev)) {
1087 dev_err(&pdev->dev,
1088 "failed to register %s regulator\n",
1089 pdev->name);
1090 return PTR_ERR(rdev);
1091 }
1092
1093 /* Save regulator for cleanup */
1094 pmic->rdev[id] = rdev;
1095 }
1096
1097 /* Start this loop from the id left from previous loop */
1098 for (; id < PALMAS_NUM_REGS; id++) {
1099 if (pdata && pdata->reg_init[id])
1100 reg_init = pdata->reg_init[id];
1101 else
1102 reg_init = NULL;
1103
1104 /* Miss out regulators which are not available due
1105 * to alternate functions.
1106 */
1107
1108 /* Register the regulators */
1109 pmic->desc[id].name = palmas_regs_info[id].name;
1110 pmic->desc[id].id = id;
1111 pmic->desc[id].type = REGULATOR_VOLTAGE;
1112 pmic->desc[id].owner = THIS_MODULE;
1113
1114 if (id < PALMAS_REG_REGEN1) {
1115 pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
1116 if (reg_init && reg_init->roof_floor)
1117 pmic->desc[id].ops =
1118 &palmas_ops_ext_control_ldo;
1119 else
1120 pmic->desc[id].ops = &palmas_ops_ldo;
1121 pmic->desc[id].min_uV = 900000;
1122 pmic->desc[id].uV_step = 50000;
1123 pmic->desc[id].linear_min_sel = 1;
1124 pmic->desc[id].enable_time = 500;
1125 pmic->desc[id].vsel_reg =
1126 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
1127 palmas_regs_info[id].vsel_addr);
1128 pmic->desc[id].vsel_mask =
1129 PALMAS_LDO1_VOLTAGE_VSEL_MASK;
1130 pmic->desc[id].enable_reg =
1131 PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
1132 palmas_regs_info[id].ctrl_addr);
1133 pmic->desc[id].enable_mask =
1134 PALMAS_LDO1_CTRL_MODE_ACTIVE;
1135
1136 /* Check if LDO8 is in tracking mode or not */
1137 if (pdata && (id == PALMAS_REG_LDO8) &&
1138 pdata->enable_ldo8_tracking) {
1139 palmas_enable_ldo8_track(palmas);
1140 pmic->desc[id].min_uV = 450000;
1141 pmic->desc[id].uV_step = 25000;
1142 }
1143
1144 /* LOD6 in vibrator mode will have enable time 2000us */
1145 if (pdata && pdata->ldo6_vibrator &&
1146 (id == PALMAS_REG_LDO6))
1147 pmic->desc[id].enable_time = 2000;
1148 } else {
1149 pmic->desc[id].n_voltages = 1;
1150 if (reg_init && reg_init->roof_floor)
1151 pmic->desc[id].ops =
1152 &palmas_ops_ext_control_extreg;
1153 else
1154 pmic->desc[id].ops = &palmas_ops_extreg;
1155 pmic->desc[id].enable_reg =
1156 PALMAS_BASE_TO_REG(PALMAS_RESOURCE_BASE,
1157 palmas_regs_info[id].ctrl_addr);
1158 pmic->desc[id].enable_mask =
1159 PALMAS_REGEN1_CTRL_MODE_ACTIVE;
1160 }
1161
1162 if (pdata)
1163 config.init_data = pdata->reg_data[id];
1164 else
1165 config.init_data = NULL;
1166
1167 pmic->desc[id].supply_name = palmas_regs_info[id].sname;
1168 config.of_node = palmas_matches[id].of_node;
1169
1170 rdev = devm_regulator_register(&pdev->dev, &pmic->desc[id],
1171 &config);
1172 if (IS_ERR(rdev)) {
1173 dev_err(&pdev->dev,
1174 "failed to register %s regulator\n",
1175 pdev->name);
1176 return PTR_ERR(rdev);
1177 }
1178
1179 /* Save regulator for cleanup */
1180 pmic->rdev[id] = rdev;
1181
1182 /* Initialise sleep/init values from platform data */
1183 if (pdata) {
1184 reg_init = pdata->reg_init[id];
1185 if (reg_init) {
1186 if (id < PALMAS_REG_REGEN1)
1187 ret = palmas_ldo_init(palmas,
1188 id, reg_init);
1189 else
1190 ret = palmas_extreg_init(palmas,
1191 id, reg_init);
1192 if (ret)
1193 return ret;
1194 }
1195 }
1196 }
1197
1198
1199 return 0;
1200 }
1201
1202 static struct of_device_id of_palmas_match_tbl[] = {
1203 { .compatible = "ti,palmas-pmic", },
1204 { .compatible = "ti,twl6035-pmic", },
1205 { .compatible = "ti,twl6036-pmic", },
1206 { .compatible = "ti,twl6037-pmic", },
1207 { .compatible = "ti,tps65913-pmic", },
1208 { .compatible = "ti,tps65914-pmic", },
1209 { .compatible = "ti,tps80036-pmic", },
1210 { .compatible = "ti,tps659038-pmic", },
1211 { /* end */ }
1212 };
1213
1214 static struct platform_driver palmas_driver = {
1215 .driver = {
1216 .name = "palmas-pmic",
1217 .of_match_table = of_palmas_match_tbl,
1218 .owner = THIS_MODULE,
1219 },
1220 .probe = palmas_regulators_probe,
1221 };
1222
1223 static int __init palmas_init(void)
1224 {
1225 return platform_driver_register(&palmas_driver);
1226 }
1227 subsys_initcall(palmas_init);
1228
1229 static void __exit palmas_exit(void)
1230 {
1231 platform_driver_unregister(&palmas_driver);
1232 }
1233 module_exit(palmas_exit);
1234
1235 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
1236 MODULE_DESCRIPTION("Palmas voltage regulator driver");
1237 MODULE_LICENSE("GPL");
1238 MODULE_ALIAS("platform:palmas-pmic");
1239 MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
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