blob: f4142b4c971b914435a06a747c040b6e4573c9ce [file] [log] [blame]
Graeme Gregorye5ce4202012-05-18 16:53:57 +01001/*
2 * Driver for Regulator part of Palmas PMIC Chips
3 *
4 * Copyright 2011-2012 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/err.h>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#include <linux/slab.h>
23#include <linux/regmap.h>
24#include <linux/mfd/palmas.h>
Graeme Gregorya361cd92012-08-28 13:47:40 +020025#include <linux/of.h>
26#include <linux/of_platform.h>
27#include <linux/regulator/of_regulator.h>
Graeme Gregorye5ce4202012-05-18 16:53:57 +010028
29struct regs_info {
30 char *name;
31 u8 vsel_addr;
32 u8 ctrl_addr;
33 u8 tstep_addr;
34};
35
36static const struct regs_info palmas_regs_info[] = {
37 {
38 .name = "SMPS12",
39 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
40 .ctrl_addr = PALMAS_SMPS12_CTRL,
41 .tstep_addr = PALMAS_SMPS12_TSTEP,
42 },
43 {
44 .name = "SMPS123",
45 .vsel_addr = PALMAS_SMPS12_VOLTAGE,
46 .ctrl_addr = PALMAS_SMPS12_CTRL,
47 .tstep_addr = PALMAS_SMPS12_TSTEP,
48 },
49 {
50 .name = "SMPS3",
51 .vsel_addr = PALMAS_SMPS3_VOLTAGE,
52 .ctrl_addr = PALMAS_SMPS3_CTRL,
53 },
54 {
55 .name = "SMPS45",
56 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
57 .ctrl_addr = PALMAS_SMPS45_CTRL,
58 .tstep_addr = PALMAS_SMPS45_TSTEP,
59 },
60 {
61 .name = "SMPS457",
62 .vsel_addr = PALMAS_SMPS45_VOLTAGE,
63 .ctrl_addr = PALMAS_SMPS45_CTRL,
64 .tstep_addr = PALMAS_SMPS45_TSTEP,
65 },
66 {
67 .name = "SMPS6",
68 .vsel_addr = PALMAS_SMPS6_VOLTAGE,
69 .ctrl_addr = PALMAS_SMPS6_CTRL,
70 .tstep_addr = PALMAS_SMPS6_TSTEP,
71 },
72 {
73 .name = "SMPS7",
74 .vsel_addr = PALMAS_SMPS7_VOLTAGE,
75 .ctrl_addr = PALMAS_SMPS7_CTRL,
76 },
77 {
78 .name = "SMPS8",
79 .vsel_addr = PALMAS_SMPS8_VOLTAGE,
80 .ctrl_addr = PALMAS_SMPS8_CTRL,
81 .tstep_addr = PALMAS_SMPS8_TSTEP,
82 },
83 {
84 .name = "SMPS9",
85 .vsel_addr = PALMAS_SMPS9_VOLTAGE,
86 .ctrl_addr = PALMAS_SMPS9_CTRL,
87 },
88 {
89 .name = "SMPS10",
90 },
91 {
92 .name = "LDO1",
93 .vsel_addr = PALMAS_LDO1_VOLTAGE,
94 .ctrl_addr = PALMAS_LDO1_CTRL,
95 },
96 {
97 .name = "LDO2",
98 .vsel_addr = PALMAS_LDO2_VOLTAGE,
99 .ctrl_addr = PALMAS_LDO2_CTRL,
100 },
101 {
102 .name = "LDO3",
103 .vsel_addr = PALMAS_LDO3_VOLTAGE,
104 .ctrl_addr = PALMAS_LDO3_CTRL,
105 },
106 {
107 .name = "LDO4",
108 .vsel_addr = PALMAS_LDO4_VOLTAGE,
109 .ctrl_addr = PALMAS_LDO4_CTRL,
110 },
111 {
112 .name = "LDO5",
113 .vsel_addr = PALMAS_LDO5_VOLTAGE,
114 .ctrl_addr = PALMAS_LDO5_CTRL,
115 },
116 {
117 .name = "LDO6",
118 .vsel_addr = PALMAS_LDO6_VOLTAGE,
119 .ctrl_addr = PALMAS_LDO6_CTRL,
120 },
121 {
122 .name = "LDO7",
123 .vsel_addr = PALMAS_LDO7_VOLTAGE,
124 .ctrl_addr = PALMAS_LDO7_CTRL,
125 },
126 {
127 .name = "LDO8",
128 .vsel_addr = PALMAS_LDO8_VOLTAGE,
129 .ctrl_addr = PALMAS_LDO8_CTRL,
130 },
131 {
132 .name = "LDO9",
133 .vsel_addr = PALMAS_LDO9_VOLTAGE,
134 .ctrl_addr = PALMAS_LDO9_CTRL,
135 },
136 {
137 .name = "LDOLN",
138 .vsel_addr = PALMAS_LDOLN_VOLTAGE,
139 .ctrl_addr = PALMAS_LDOLN_CTRL,
140 },
141 {
142 .name = "LDOUSB",
143 .vsel_addr = PALMAS_LDOUSB_VOLTAGE,
144 .ctrl_addr = PALMAS_LDOUSB_CTRL,
145 },
146};
147
148#define SMPS_CTRL_MODE_OFF 0x00
149#define SMPS_CTRL_MODE_ON 0x01
150#define SMPS_CTRL_MODE_ECO 0x02
151#define SMPS_CTRL_MODE_PWM 0x03
152
153/* These values are derived from the data sheet. And are the number of steps
154 * where there is a voltage change, the ranges at beginning and end of register
155 * max/min values where there are no change are ommitted.
156 *
157 * So they are basically (maxV-minV)/stepV
158 */
159#define PALMAS_SMPS_NUM_VOLTAGES 116
160#define PALMAS_SMPS10_NUM_VOLTAGES 2
161#define PALMAS_LDO_NUM_VOLTAGES 50
162
163#define SMPS10_VSEL (1<<3)
164#define SMPS10_BOOST_EN (1<<2)
165#define SMPS10_BYPASS_EN (1<<1)
166#define SMPS10_SWITCH_EN (1<<0)
167
168#define REGULATOR_SLAVE 0
169
170static int palmas_smps_read(struct palmas *palmas, unsigned int reg,
171 unsigned int *dest)
172{
173 unsigned int addr;
174
175 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
176
177 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
178}
179
180static int palmas_smps_write(struct palmas *palmas, unsigned int reg,
181 unsigned int value)
182{
183 unsigned int addr;
184
185 addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg);
186
187 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
188}
189
190static int palmas_ldo_read(struct palmas *palmas, unsigned int reg,
191 unsigned int *dest)
192{
193 unsigned int addr;
194
195 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
196
197 return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest);
198}
199
200static int palmas_ldo_write(struct palmas *palmas, unsigned int reg,
201 unsigned int value)
202{
203 unsigned int addr;
204
205 addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg);
206
207 return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value);
208}
209
210static int palmas_is_enabled_smps(struct regulator_dev *dev)
211{
212 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
213 int id = rdev_get_id(dev);
214 unsigned int reg;
215
216 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
217
218 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
219 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
220
221 return !!(reg);
222}
223
224static int palmas_enable_smps(struct regulator_dev *dev)
225{
226 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
227 int id = rdev_get_id(dev);
228 unsigned int reg;
229
230 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
231
232 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
233 reg |= SMPS_CTRL_MODE_ON;
234
235 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
236
237 return 0;
238}
239
240static int palmas_disable_smps(struct regulator_dev *dev)
241{
242 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
243 int id = rdev_get_id(dev);
244 unsigned int reg;
245
246 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
247
248 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
249
250 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
251
252 return 0;
253}
254
255
256static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode)
257{
258 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
259 int id = rdev_get_id(dev);
260 unsigned int reg;
261
262 palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
Axel Lin999f0c72012-06-07 17:08:21 +0800263 reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK;
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100264
265 switch (mode) {
266 case REGULATOR_MODE_NORMAL:
267 reg |= SMPS_CTRL_MODE_ON;
268 break;
269 case REGULATOR_MODE_IDLE:
270 reg |= SMPS_CTRL_MODE_ECO;
271 break;
272 case REGULATOR_MODE_FAST:
273 reg |= SMPS_CTRL_MODE_PWM;
274 break;
275 default:
276 return -EINVAL;
277 }
278 palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg);
279
280 return 0;
281}
282
283static unsigned int palmas_get_mode_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 reg &= PALMAS_SMPS12_CTRL_STATUS_MASK;
291 reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT;
292
293 switch (reg) {
294 case SMPS_CTRL_MODE_ON:
295 return REGULATOR_MODE_NORMAL;
296 case SMPS_CTRL_MODE_ECO:
297 return REGULATOR_MODE_IDLE;
298 case SMPS_CTRL_MODE_PWM:
299 return REGULATOR_MODE_FAST;
300 }
301
302 return 0;
303}
304
305static int palmas_list_voltage_smps(struct regulator_dev *dev,
306 unsigned selector)
307{
308 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
309 int id = rdev_get_id(dev);
310 int mult = 1;
311
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100312 /* Read the multiplier set in VSEL register to return
313 * the correct voltage.
314 */
315 if (pmic->range[id])
316 mult = 2;
317
Axel Linad02e842012-11-29 09:59:16 +0800318 if (selector == 0)
319 return 0;
320 else if (selector < 6)
321 return 500000 * mult;
322 else
323 /* Voltage is linear mapping starting from selector 6,
324 * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
325 * RANGE is either x1 or x2
326 */
327 return (490000 + ((selector - 5) * 10000)) * mult;
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100328}
329
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100330static int palmas_map_voltage_smps(struct regulator_dev *rdev,
331 int min_uV, int max_uV)
332{
Axel Lin8a165df2012-07-17 11:29:03 +0800333 struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
334 int id = rdev_get_id(rdev);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100335 int ret, voltage;
336
Axel Lin8a165df2012-07-17 11:29:03 +0800337 if (min_uV == 0)
338 return 0;
339
340 if (pmic->range[id]) { /* RANGE is x2 */
341 if (min_uV < 1000000)
342 min_uV = 1000000;
Axel Linad02e842012-11-29 09:59:16 +0800343 ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
Axel Lin8a165df2012-07-17 11:29:03 +0800344 } else { /* RANGE is x1 */
345 if (min_uV < 500000)
346 min_uV = 500000;
Axel Linad02e842012-11-29 09:59:16 +0800347 ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
Axel Lin8a165df2012-07-17 11:29:03 +0800348 }
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100349
350 /* Map back into a voltage to verify we're still in bounds */
351 voltage = palmas_list_voltage_smps(rdev, ret);
352 if (voltage < min_uV || voltage > max_uV)
353 return -EINVAL;
354
355 return ret;
356}
357
358static struct regulator_ops palmas_ops_smps = {
359 .is_enabled = palmas_is_enabled_smps,
360 .enable = palmas_enable_smps,
361 .disable = palmas_disable_smps,
362 .set_mode = palmas_set_mode_smps,
363 .get_mode = palmas_get_mode_smps,
Axel Linbdc4baa2012-11-29 10:01:44 +0800364 .get_voltage_sel = regulator_get_voltage_sel_regmap,
365 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100366 .list_voltage = palmas_list_voltage_smps,
367 .map_voltage = palmas_map_voltage_smps,
368};
369
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100370static struct regulator_ops palmas_ops_smps10 = {
371 .is_enabled = regulator_is_enabled_regmap,
372 .enable = regulator_enable_regmap,
373 .disable = regulator_disable_regmap,
374 .get_voltage_sel = regulator_get_voltage_sel_regmap,
375 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Axel Lin8029a002012-05-22 12:26:42 +0800376 .list_voltage = regulator_list_voltage_linear,
377 .map_voltage = regulator_map_voltage_linear,
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100378};
379
380static int palmas_is_enabled_ldo(struct regulator_dev *dev)
381{
382 struct palmas_pmic *pmic = rdev_get_drvdata(dev);
383 int id = rdev_get_id(dev);
384 unsigned int reg;
385
386 palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, &reg);
387
388 reg &= PALMAS_LDO1_CTRL_STATUS;
389
390 return !!(reg);
391}
392
393static int palmas_list_voltage_ldo(struct regulator_dev *dev,
394 unsigned selector)
395{
396 if (!selector)
397 return 0;
398
399 /* voltage is 0.85V + (selector * 0.05v) */
400 return 850000 + (selector * 50000);
401}
402
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100403static int palmas_map_voltage_ldo(struct regulator_dev *rdev,
404 int min_uV, int max_uV)
405{
406 int ret, voltage;
407
Axel Lina5f8ae22012-07-18 12:30:11 +0800408 if (min_uV == 0)
409 return 0;
410
411 if (min_uV < 900000)
412 min_uV = 900000;
413 ret = DIV_ROUND_UP(min_uV - 900000, 50000) + 1;
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100414
415 /* Map back into a voltage to verify we're still in bounds */
416 voltage = palmas_list_voltage_ldo(rdev, ret);
417 if (voltage < min_uV || voltage > max_uV)
418 return -EINVAL;
419
420 return ret;
421}
422
423static struct regulator_ops palmas_ops_ldo = {
424 .is_enabled = palmas_is_enabled_ldo,
425 .enable = regulator_enable_regmap,
426 .disable = regulator_disable_regmap,
Axel Lin4a247a92012-07-18 12:34:08 +0800427 .get_voltage_sel = regulator_get_voltage_sel_regmap,
428 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100429 .list_voltage = palmas_list_voltage_ldo,
430 .map_voltage = palmas_map_voltage_ldo,
431};
432
433/*
434 * setup the hardware based sleep configuration of the SMPS/LDO regulators
435 * from the platform data. This is different to the software based control
436 * supported by the regulator framework as it is controlled by toggling
437 * pins on the PMIC such as PREQ, SYSEN, ...
438 */
439static int palmas_smps_init(struct palmas *palmas, int id,
440 struct palmas_reg_init *reg_init)
441{
442 unsigned int reg;
443 unsigned int addr;
444 int ret;
445
446 addr = palmas_regs_info[id].ctrl_addr;
447
448 ret = palmas_smps_read(palmas, addr, &reg);
449 if (ret)
450 return ret;
451
Axel Linfedd89b2012-06-06 20:01:38 +0800452 switch (id) {
453 case PALMAS_REG_SMPS10:
454 if (reg_init->mode_sleep) {
455 reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK;
456 reg |= reg_init->mode_sleep <<
457 PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT;
458 }
459 break;
460 default:
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100461 if (reg_init->warm_reset)
462 reg |= PALMAS_SMPS12_CTRL_WR_S;
463
464 if (reg_init->roof_floor)
465 reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN;
466
467 if (reg_init->mode_sleep) {
468 reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK;
469 reg |= reg_init->mode_sleep <<
470 PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT;
471 }
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100472 }
Axel Linfedd89b2012-06-06 20:01:38 +0800473
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100474 ret = palmas_smps_write(palmas, addr, reg);
475 if (ret)
476 return ret;
477
478 if (palmas_regs_info[id].tstep_addr && reg_init->tstep) {
479 addr = palmas_regs_info[id].tstep_addr;
480
481 reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK;
482
483 ret = palmas_smps_write(palmas, addr, reg);
484 if (ret)
485 return ret;
486 }
487
488 if (palmas_regs_info[id].vsel_addr && reg_init->vsel) {
489 addr = palmas_regs_info[id].vsel_addr;
490
491 reg = reg_init->vsel;
492
493 ret = palmas_smps_write(palmas, addr, reg);
494 if (ret)
495 return ret;
496 }
497
498
499 return 0;
500}
501
502static int palmas_ldo_init(struct palmas *palmas, int id,
503 struct palmas_reg_init *reg_init)
504{
505 unsigned int reg;
506 unsigned int addr;
507 int ret;
508
509 addr = palmas_regs_info[id].ctrl_addr;
510
Axel Lin2735dae2012-07-18 12:31:59 +0800511 ret = palmas_ldo_read(palmas, addr, &reg);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100512 if (ret)
513 return ret;
514
515 if (reg_init->warm_reset)
516 reg |= PALMAS_LDO1_CTRL_WR_S;
517
518 if (reg_init->mode_sleep)
519 reg |= PALMAS_LDO1_CTRL_MODE_SLEEP;
520
Axel Lin2735dae2012-07-18 12:31:59 +0800521 ret = palmas_ldo_write(palmas, addr, reg);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100522 if (ret)
523 return ret;
524
525 return 0;
526}
527
Graeme Gregorya361cd92012-08-28 13:47:40 +0200528static struct of_regulator_match palmas_matches[] = {
529 { .name = "smps12", },
530 { .name = "smps123", },
531 { .name = "smps3", },
532 { .name = "smps45", },
533 { .name = "smps457", },
534 { .name = "smps6", },
535 { .name = "smps7", },
536 { .name = "smps8", },
537 { .name = "smps9", },
538 { .name = "smps10", },
539 { .name = "ldo1", },
540 { .name = "ldo2", },
541 { .name = "ldo3", },
542 { .name = "ldo4", },
543 { .name = "ldo5", },
544 { .name = "ldo6", },
545 { .name = "ldo7", },
546 { .name = "ldo8", },
547 { .name = "ldo9", },
548 { .name = "ldoln", },
549 { .name = "ldousb", },
550};
551
552static void __devinit palmas_dt_to_pdata(struct device *dev,
553 struct device_node *node,
554 struct palmas_pmic_platform_data *pdata)
555{
556 struct device_node *regulators;
557 u32 prop;
558 int idx, ret;
559
560 regulators = of_find_node_by_name(node, "regulators");
561 if (!regulators) {
562 dev_info(dev, "regulator node not found\n");
563 return;
564 }
565
566 ret = of_regulator_match(dev, regulators, palmas_matches,
567 PALMAS_NUM_REGS);
568 if (ret < 0) {
569 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
570 return;
571 }
572
573 for (idx = 0; idx < PALMAS_NUM_REGS; idx++) {
574 if (!palmas_matches[idx].init_data ||
575 !palmas_matches[idx].of_node)
576 continue;
577
578 pdata->reg_data[idx] = palmas_matches[idx].init_data;
579
580 pdata->reg_init[idx] = devm_kzalloc(dev,
581 sizeof(struct palmas_reg_init), GFP_KERNEL);
582
583 ret = of_property_read_u32(palmas_matches[idx].of_node,
584 "ti,warm_reset", &prop);
585 if (!ret)
586 pdata->reg_init[idx]->warm_reset = prop;
587
588 ret = of_property_read_u32(palmas_matches[idx].of_node,
589 "ti,roof_floor", &prop);
590 if (!ret)
591 pdata->reg_init[idx]->roof_floor = prop;
592
593 ret = of_property_read_u32(palmas_matches[idx].of_node,
594 "ti,mode_sleep", &prop);
595 if (!ret)
596 pdata->reg_init[idx]->mode_sleep = prop;
597
598 ret = of_property_read_u32(palmas_matches[idx].of_node,
599 "ti,warm_reset", &prop);
600 if (!ret)
601 pdata->reg_init[idx]->warm_reset = prop;
602
603 ret = of_property_read_u32(palmas_matches[idx].of_node,
604 "ti,tstep", &prop);
605 if (!ret)
606 pdata->reg_init[idx]->tstep = prop;
607
608 ret = of_property_read_u32(palmas_matches[idx].of_node,
609 "ti,vsel", &prop);
610 if (!ret)
611 pdata->reg_init[idx]->vsel = prop;
612 }
613
614 ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop);
615 if (!ret)
616 pdata->ldo6_vibrator = prop;
617}
618
619
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100620static __devinit int palmas_probe(struct platform_device *pdev)
621{
622 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
623 struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data;
Graeme Gregorya361cd92012-08-28 13:47:40 +0200624 struct device_node *node = pdev->dev.of_node;
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100625 struct regulator_dev *rdev;
626 struct regulator_config config = { };
627 struct palmas_pmic *pmic;
628 struct palmas_reg_init *reg_init;
629 int id = 0, ret;
630 unsigned int addr, reg;
631
Graeme Gregorya361cd92012-08-28 13:47:40 +0200632 if (node && !pdata) {
633 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
634
635 if (!pdata)
636 return -ENOMEM;
637
638 palmas_dt_to_pdata(&pdev->dev, node, pdata);
639 }
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100640
641 pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
642 if (!pmic)
643 return -ENOMEM;
644
645 pmic->dev = &pdev->dev;
646 pmic->palmas = palmas;
647 palmas->pmic = pmic;
648 platform_set_drvdata(pdev, pmic);
649
650 ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
651 if (ret)
Axel Lin1c9d2d72012-07-18 12:33:20 +0800652 return ret;
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100653
654 if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN)
655 pmic->smps123 = 1;
656
657 if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN)
658 pmic->smps457 = 1;
659
660 config.regmap = palmas->regmap[REGULATOR_SLAVE];
661 config.dev = &pdev->dev;
662 config.driver_data = pmic;
663
664 for (id = 0; id < PALMAS_REG_LDO1; id++) {
665
666 /*
667 * Miss out regulators which are not available due
668 * to slaving configurations.
669 */
670 switch (id) {
671 case PALMAS_REG_SMPS12:
672 case PALMAS_REG_SMPS3:
673 if (pmic->smps123)
674 continue;
675 break;
676 case PALMAS_REG_SMPS123:
677 if (!pmic->smps123)
678 continue;
679 break;
680 case PALMAS_REG_SMPS45:
681 case PALMAS_REG_SMPS7:
682 if (pmic->smps457)
683 continue;
684 break;
685 case PALMAS_REG_SMPS457:
686 if (!pmic->smps457)
687 continue;
688 }
689
Axel Linbdc4baa2012-11-29 10:01:44 +0800690 /* Initialise sleep/init values from platform data */
691 if (pdata && pdata->reg_init[id]) {
692 reg_init = pdata->reg_init[id];
693 ret = palmas_smps_init(palmas, id, reg_init);
694 if (ret)
695 goto err_unregister_regulator;
696 }
697
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100698 /* Register the regulators */
699 pmic->desc[id].name = palmas_regs_info[id].name;
700 pmic->desc[id].id = id;
701
Axel Linfedd89b2012-06-06 20:01:38 +0800702 switch (id) {
703 case PALMAS_REG_SMPS10:
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100704 pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES;
705 pmic->desc[id].ops = &palmas_ops_smps10;
Axel Lin12565b12012-07-18 12:31:03 +0800706 pmic->desc[id].vsel_reg =
707 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
708 PALMAS_SMPS10_CTRL);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100709 pmic->desc[id].vsel_mask = SMPS10_VSEL;
Graeme Gregorya68de072012-06-22 13:36:20 +0100710 pmic->desc[id].enable_reg =
711 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
712 PALMAS_SMPS10_STATUS);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100713 pmic->desc[id].enable_mask = SMPS10_BOOST_EN;
Axel Lin8029a002012-05-22 12:26:42 +0800714 pmic->desc[id].min_uV = 3750000;
715 pmic->desc[id].uV_step = 1250000;
Axel Linfedd89b2012-06-06 20:01:38 +0800716 break;
717 default:
Axel Linbdc4baa2012-11-29 10:01:44 +0800718 /*
719 * Read and store the RANGE bit for later use
720 * This must be done before regulator is probed,
721 * otherwise we error in probe with unsupportable ranges.
722 */
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100723 addr = palmas_regs_info[id].vsel_addr;
724
725 ret = palmas_smps_read(pmic->palmas, addr, &reg);
726 if (ret)
727 goto err_unregister_regulator;
728 if (reg & PALMAS_SMPS12_VOLTAGE_RANGE)
729 pmic->range[id] = 1;
Axel Linbdc4baa2012-11-29 10:01:44 +0800730
731 pmic->desc[id].ops = &palmas_ops_smps;
732 pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES;
733 pmic->desc[id].vsel_reg =
734 PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
735 palmas_regs_info[id].vsel_addr);
736 pmic->desc[id].vsel_mask =
737 PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100738 }
739
Axel Linbdc4baa2012-11-29 10:01:44 +0800740 pmic->desc[id].type = REGULATOR_VOLTAGE;
741 pmic->desc[id].owner = THIS_MODULE;
742
Graeme Gregorya361cd92012-08-28 13:47:40 +0200743 if (pdata)
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100744 config.init_data = pdata->reg_data[id];
745 else
746 config.init_data = NULL;
747
Graeme Gregorya361cd92012-08-28 13:47:40 +0200748 config.of_node = palmas_matches[id].of_node;
749
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100750 rdev = regulator_register(&pmic->desc[id], &config);
751 if (IS_ERR(rdev)) {
752 dev_err(&pdev->dev,
753 "failed to register %s regulator\n",
754 pdev->name);
755 ret = PTR_ERR(rdev);
756 goto err_unregister_regulator;
757 }
758
759 /* Save regulator for cleanup */
760 pmic->rdev[id] = rdev;
761 }
762
763 /* Start this loop from the id left from previous loop */
764 for (; id < PALMAS_NUM_REGS; id++) {
765
766 /* Miss out regulators which are not available due
767 * to alternate functions.
768 */
769
770 /* Register the regulators */
771 pmic->desc[id].name = palmas_regs_info[id].name;
772 pmic->desc[id].id = id;
773 pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES;
774
775 pmic->desc[id].ops = &palmas_ops_ldo;
776
777 pmic->desc[id].type = REGULATOR_VOLTAGE;
778 pmic->desc[id].owner = THIS_MODULE;
Axel Lin4a247a92012-07-18 12:34:08 +0800779 pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
780 palmas_regs_info[id].vsel_addr);
781 pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK;
Graeme Gregorya68de072012-06-22 13:36:20 +0100782 pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE,
783 palmas_regs_info[id].ctrl_addr);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100784 pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE;
785
Graeme Gregorya361cd92012-08-28 13:47:40 +0200786 if (pdata)
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100787 config.init_data = pdata->reg_data[id];
788 else
789 config.init_data = NULL;
790
Graeme Gregorya361cd92012-08-28 13:47:40 +0200791 config.of_node = palmas_matches[id].of_node;
792
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100793 rdev = regulator_register(&pmic->desc[id], &config);
794 if (IS_ERR(rdev)) {
795 dev_err(&pdev->dev,
796 "failed to register %s regulator\n",
797 pdev->name);
798 ret = PTR_ERR(rdev);
799 goto err_unregister_regulator;
800 }
801
802 /* Save regulator for cleanup */
803 pmic->rdev[id] = rdev;
804
805 /* Initialise sleep/init values from platform data */
Graeme Gregorya361cd92012-08-28 13:47:40 +0200806 if (pdata) {
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100807 reg_init = pdata->reg_init[id];
808 if (reg_init) {
809 ret = palmas_ldo_init(palmas, id, reg_init);
Axel Lin1c9d2d72012-07-18 12:33:20 +0800810 if (ret) {
811 regulator_unregister(pmic->rdev[id]);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100812 goto err_unregister_regulator;
Axel Lin1c9d2d72012-07-18 12:33:20 +0800813 }
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100814 }
815 }
816 }
817
818 return 0;
819
820err_unregister_regulator:
821 while (--id >= 0)
822 regulator_unregister(pmic->rdev[id]);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100823 return ret;
824}
825
826static int __devexit palmas_remove(struct platform_device *pdev)
827{
828 struct palmas_pmic *pmic = platform_get_drvdata(pdev);
829 int id;
830
831 for (id = 0; id < PALMAS_NUM_REGS; id++)
832 regulator_unregister(pmic->rdev[id]);
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100833 return 0;
834}
835
Graeme Gregorya361cd92012-08-28 13:47:40 +0200836static struct of_device_id __devinitdata of_palmas_match_tbl[] = {
837 { .compatible = "ti,palmas-pmic", },
838 { /* end */ }
839};
840
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100841static struct platform_driver palmas_driver = {
842 .driver = {
843 .name = "palmas-pmic",
Graeme Gregorya361cd92012-08-28 13:47:40 +0200844 .of_match_table = of_palmas_match_tbl,
Graeme Gregorye5ce4202012-05-18 16:53:57 +0100845 .owner = THIS_MODULE,
846 },
847 .probe = palmas_probe,
848 .remove = __devexit_p(palmas_remove),
849};
850
851static int __init palmas_init(void)
852{
853 return platform_driver_register(&palmas_driver);
854}
855subsys_initcall(palmas_init);
856
857static void __exit palmas_exit(void)
858{
859 platform_driver_unregister(&palmas_driver);
860}
861module_exit(palmas_exit);
862
863MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
864MODULE_DESCRIPTION("Palmas voltage regulator driver");
865MODULE_LICENSE("GPL");
866MODULE_ALIAS("platform:palmas-pmic");
Graeme Gregorya361cd92012-08-28 13:47:40 +0200867MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);