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regulator: qcom: Don't enable DRMS in driver
[deliverable/linux.git] / drivers / regulator / qcom_rpm-regulator.c
CommitLineData
2720386e
BA		 1/*
2 * Copyright (c) 2014, Sony Mobile Communications AB.
3 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 and
7 * only version 2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/of.h>
18#include <linux/of_device.h>
19#include <linux/regulator/driver.h>
20#include <linux/regulator/machine.h>
21#include <linux/regulator/of_regulator.h>
22#include <linux/mfd/qcom_rpm.h>
23
24#include <dt-bindings/mfd/qcom-rpm.h>
25
26#define MAX_REQUEST_LEN 2
27
28struct request_member {
29 int word;
30 unsigned int mask;
31 int shift;
32};
33
34struct rpm_reg_parts {
35 struct request_member mV; /* used if voltage is in mV */
36 struct request_member uV; /* used if voltage is in uV */
37 struct request_member ip; /* peak current in mA */
38 struct request_member pd; /* pull down enable */
39 struct request_member ia; /* average current in mA */
40 struct request_member fm; /* force mode */
41 struct request_member pm; /* power mode */
42 struct request_member pc; /* pin control */
43 struct request_member pf; /* pin function */
44 struct request_member enable_state; /* NCP and switch */
45 struct request_member comp_mode; /* NCP */
46 struct request_member freq; /* frequency: NCP and SMPS */
47 struct request_member freq_clk_src; /* clock source: SMPS */
48 struct request_member hpm; /* switch: control OCP and SS */
49 int request_len;
50};
51
52#define FORCE_MODE_IS_2_BITS(reg) \
6a642509 53 (((reg)->parts->fm.mask >> (reg)->parts->fm.shift) == 3)
2720386e
BA		 54
55struct qcom_rpm_reg {
56 struct qcom_rpm *rpm;
57
58 struct mutex lock;
59 struct device *dev;
60 struct regulator_desc desc;
61 const struct rpm_reg_parts *parts;
62
63 int resource;
64 u32 val[MAX_REQUEST_LEN];
65
66 int uV;
67 int is_enabled;
68
69 bool supports_force_mode_auto;
70 bool supports_force_mode_bypass;
71};
72
73static const struct rpm_reg_parts rpm8660_ldo_parts = {
74 .request_len = 2,
75 .mV = { 0, 0x00000FFF, 0 },
76 .ip = { 0, 0x00FFF000, 12 },
77 .fm = { 0, 0x03000000, 24 },
78 .pc = { 0, 0x3C000000, 26 },
79 .pf = { 0, 0xC0000000, 30 },
80 .pd = { 1, 0x00000001, 0 },
81 .ia = { 1, 0x00001FFE, 1 },
82};
83
84static const struct rpm_reg_parts rpm8660_smps_parts = {
85 .request_len = 2,
86 .mV = { 0, 0x00000FFF, 0 },
87 .ip = { 0, 0x00FFF000, 12 },
88 .fm = { 0, 0x03000000, 24 },
89 .pc = { 0, 0x3C000000, 26 },
90 .pf = { 0, 0xC0000000, 30 },
91 .pd = { 1, 0x00000001, 0 },
92 .ia = { 1, 0x00001FFE, 1 },
93 .freq = { 1, 0x001FE000, 13 },
94 .freq_clk_src = { 1, 0x00600000, 21 },
95};
96
97static const struct rpm_reg_parts rpm8660_switch_parts = {
98 .request_len = 1,
99 .enable_state = { 0, 0x00000001, 0 },
100 .pd = { 0, 0x00000002, 1 },
101 .pc = { 0, 0x0000003C, 2 },
102 .pf = { 0, 0x000000C0, 6 },
103 .hpm = { 0, 0x00000300, 8 },
104};
105
106static const struct rpm_reg_parts rpm8660_ncp_parts = {
107 .request_len = 1,
108 .mV = { 0, 0x00000FFF, 0 },
109 .enable_state = { 0, 0x00001000, 12 },
110 .comp_mode = { 0, 0x00002000, 13 },
111 .freq = { 0, 0x003FC000, 14 },
112};
113
114static const struct rpm_reg_parts rpm8960_ldo_parts = {
115 .request_len = 2,
116 .uV = { 0, 0x007FFFFF, 0 },
117 .pd = { 0, 0x00800000, 23 },
118 .pc = { 0, 0x0F000000, 24 },
119 .pf = { 0, 0xF0000000, 28 },
120 .ip = { 1, 0x000003FF, 0 },
121 .ia = { 1, 0x000FFC00, 10 },
122 .fm = { 1, 0x00700000, 20 },
123};
124
125static const struct rpm_reg_parts rpm8960_smps_parts = {
126 .request_len = 2,
127 .uV = { 0, 0x007FFFFF, 0 },
128 .pd = { 0, 0x00800000, 23 },
129 .pc = { 0, 0x0F000000, 24 },
130 .pf = { 0, 0xF0000000, 28 },
131 .ip = { 1, 0x000003FF, 0 },
132 .ia = { 1, 0x000FFC00, 10 },
133 .fm = { 1, 0x00700000, 20 },
134 .pm = { 1, 0x00800000, 23 },
135 .freq = { 1, 0x1F000000, 24 },
136 .freq_clk_src = { 1, 0x60000000, 29 },
137};
138
139static const struct rpm_reg_parts rpm8960_switch_parts = {
140 .request_len = 1,
141 .enable_state = { 0, 0x00000001, 0 },
142 .pd = { 0, 0x00000002, 1 },
143 .pc = { 0, 0x0000003C, 2 },
144 .pf = { 0, 0x000003C0, 6 },
145 .hpm = { 0, 0x00000C00, 10 },
146};
147
148static const struct rpm_reg_parts rpm8960_ncp_parts = {
149 .request_len = 1,
150 .uV = { 0, 0x007FFFFF, 0 },
151 .enable_state = { 0, 0x00800000, 23 },
152 .comp_mode = { 0, 0x01000000, 24 },
153 .freq = { 0, 0x3E000000, 25 },
154};
155
156/*
157 * Physically available PMIC regulator voltage ranges
158 */
159static const struct regulator_linear_range pldo_ranges[] = {
160 REGULATOR_LINEAR_RANGE( 750000, 0, 59, 12500),
161 REGULATOR_LINEAR_RANGE(1500000, 60, 123, 25000),
162 REGULATOR_LINEAR_RANGE(3100000, 124, 160, 50000),
163};
164
165static const struct regulator_linear_range nldo_ranges[] = {
166 REGULATOR_LINEAR_RANGE( 750000, 0, 63, 12500),
167};
168
169static const struct regulator_linear_range nldo1200_ranges[] = {
170 REGULATOR_LINEAR_RANGE( 375000, 0, 59, 6250),
171 REGULATOR_LINEAR_RANGE( 750000, 60, 123, 12500),
172};
173
174static const struct regulator_linear_range smps_ranges[] = {
175 REGULATOR_LINEAR_RANGE( 375000, 0, 29, 12500),
176 REGULATOR_LINEAR_RANGE( 750000, 30, 89, 12500),
177 REGULATOR_LINEAR_RANGE(1500000, 90, 153, 25000),
178};
179
180static const struct regulator_linear_range ftsmps_ranges[] = {
181 REGULATOR_LINEAR_RANGE( 350000, 0, 6, 50000),
182 REGULATOR_LINEAR_RANGE( 700000, 7, 63, 12500),
183 REGULATOR_LINEAR_RANGE(1500000, 64, 100, 50000),
184};
185
0f5bb5b5
JC		 186static const struct regulator_linear_range smb208_ranges[] = {
187 REGULATOR_LINEAR_RANGE( 375000, 0, 29, 12500),
188 REGULATOR_LINEAR_RANGE( 750000, 30, 89, 12500),
189 REGULATOR_LINEAR_RANGE(1500000, 90, 153, 25000),
190 REGULATOR_LINEAR_RANGE(3100000, 154, 234, 25000),
191};
192
2720386e
BA		 193static const struct regulator_linear_range ncp_ranges[] = {
194 REGULATOR_LINEAR_RANGE(1500000, 0, 31, 50000),
195};
196
197static int rpm_reg_write(struct qcom_rpm_reg *vreg,
198 const struct request_member *req,
199 const int value)
200{
201 if (WARN_ON((value << req->shift) & ~req->mask))
202 return -EINVAL;
203
204 vreg->val[req->word] &= ~req->mask;
205 vreg->val[req->word] |= value << req->shift;
206
207 return qcom_rpm_write(vreg->rpm,
80392682 208 QCOM_RPM_ACTIVE_STATE,
2720386e
BA		 209 vreg->resource,
210 vreg->val,
211 vreg->parts->request_len);
212}
213
214static int rpm_reg_set_mV_sel(struct regulator_dev *rdev,
215 unsigned selector)
216{
217 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
218 const struct rpm_reg_parts *parts = vreg->parts;
219 const struct request_member *req = &parts->mV;
220 int ret = 0;
221 int uV;
222
223 if (req->mask == 0)
224 return -EINVAL;
225
226 uV = regulator_list_voltage_linear_range(rdev, selector);
227 if (uV < 0)
228 return uV;
229
230 mutex_lock(&vreg->lock);
2720386e 231 if (vreg->is_enabled)
c6515d2f
AL		 232 ret = rpm_reg_write(vreg, req, uV / 1000);
233
234 if (!ret)
235 vreg->uV = uV;
2720386e
BA		 236 mutex_unlock(&vreg->lock);
237
238 return ret;
239}
240
241static int rpm_reg_set_uV_sel(struct regulator_dev *rdev,
242 unsigned selector)
243{
244 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
245 const struct rpm_reg_parts *parts = vreg->parts;
246 const struct request_member *req = &parts->uV;
247 int ret = 0;
248 int uV;
249
250 if (req->mask == 0)
251 return -EINVAL;
252
253 uV = regulator_list_voltage_linear_range(rdev, selector);
254 if (uV < 0)
255 return uV;
256
257 mutex_lock(&vreg->lock);
2720386e 258 if (vreg->is_enabled)
c6515d2f
AL		 259 ret = rpm_reg_write(vreg, req, uV);
260
261 if (!ret)
262 vreg->uV = uV;
2720386e
BA		 263 mutex_unlock(&vreg->lock);
264
265 return ret;
266}
267
268static int rpm_reg_get_voltage(struct regulator_dev *rdev)
269{
270 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
271
272 return vreg->uV;
273}
274
275static int rpm_reg_mV_enable(struct regulator_dev *rdev)
276{
277 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
278 const struct rpm_reg_parts *parts = vreg->parts;
279 const struct request_member *req = &parts->mV;
280 int ret;
281
282 if (req->mask == 0)
283 return -EINVAL;
284
285 mutex_lock(&vreg->lock);
286 ret = rpm_reg_write(vreg, req, vreg->uV / 1000);
287 if (!ret)
288 vreg->is_enabled = 1;
289 mutex_unlock(&vreg->lock);
290
291 return ret;
292}
293
294static int rpm_reg_uV_enable(struct regulator_dev *rdev)
295{
296 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
297 const struct rpm_reg_parts *parts = vreg->parts;
298 const struct request_member *req = &parts->uV;
299 int ret;
300
301 if (req->mask == 0)
302 return -EINVAL;
303
304 mutex_lock(&vreg->lock);
305 ret = rpm_reg_write(vreg, req, vreg->uV);
306 if (!ret)
307 vreg->is_enabled = 1;
308 mutex_unlock(&vreg->lock);
309
310 return ret;
311}
312
313static int rpm_reg_switch_enable(struct regulator_dev *rdev)
314{
315 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
316 const struct rpm_reg_parts *parts = vreg->parts;
317 const struct request_member *req = &parts->enable_state;
318 int ret;
319
320 if (req->mask == 0)
321 return -EINVAL;
322
323 mutex_lock(&vreg->lock);
324 ret = rpm_reg_write(vreg, req, 1);
325 if (!ret)
326 vreg->is_enabled = 1;
327 mutex_unlock(&vreg->lock);
328
329 return ret;
330}
331
332static int rpm_reg_mV_disable(struct regulator_dev *rdev)
333{
334 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
335 const struct rpm_reg_parts *parts = vreg->parts;
336 const struct request_member *req = &parts->mV;
337 int ret;
338
339 if (req->mask == 0)
340 return -EINVAL;
341
342 mutex_lock(&vreg->lock);
343 ret = rpm_reg_write(vreg, req, 0);
344 if (!ret)
345 vreg->is_enabled = 0;
346 mutex_unlock(&vreg->lock);
347
348 return ret;
349}
350
351static int rpm_reg_uV_disable(struct regulator_dev *rdev)
352{
353 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
354 const struct rpm_reg_parts *parts = vreg->parts;
355 const struct request_member *req = &parts->uV;
356 int ret;
357
358 if (req->mask == 0)
359 return -EINVAL;
360
361 mutex_lock(&vreg->lock);
362 ret = rpm_reg_write(vreg, req, 0);
363 if (!ret)
364 vreg->is_enabled = 0;
365 mutex_unlock(&vreg->lock);
366
367 return ret;
368}
369
370static int rpm_reg_switch_disable(struct regulator_dev *rdev)
371{
372 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
373 const struct rpm_reg_parts *parts = vreg->parts;
374 const struct request_member *req = &parts->enable_state;
375 int ret;
376
377 if (req->mask == 0)
378 return -EINVAL;
379
380 mutex_lock(&vreg->lock);
381 ret = rpm_reg_write(vreg, req, 0);
382 if (!ret)
383 vreg->is_enabled = 0;
384 mutex_unlock(&vreg->lock);
385
386 return ret;
387}
388
389static int rpm_reg_is_enabled(struct regulator_dev *rdev)
390{
391 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
392
393 return vreg->is_enabled;
394}
395
2b85c28a
BA		 396static int rpm_reg_set_load(struct regulator_dev *rdev, int load_uA)
397{
398 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
399 const struct rpm_reg_parts *parts = vreg->parts;
400 const struct request_member *req = &parts->ia;
401 int load_mA = load_uA / 1000;
402 int max_mA = req->mask >> req->shift;
403 int ret;
404
405 if (req->mask == 0)
406 return -EINVAL;
407
408 if (load_mA > max_mA)
409 load_mA = max_mA;
410
411 mutex_lock(&vreg->lock);
412 ret = rpm_reg_write(vreg, req, load_mA);
413 mutex_unlock(&vreg->lock);
414
415 return ret;
416}
417
2720386e
BA		 418static struct regulator_ops uV_ops = {
419 .list_voltage = regulator_list_voltage_linear_range,
420
421 .set_voltage_sel = rpm_reg_set_uV_sel,
422 .get_voltage = rpm_reg_get_voltage,
423
424 .enable = rpm_reg_uV_enable,
425 .disable = rpm_reg_uV_disable,
426 .is_enabled = rpm_reg_is_enabled,
2b85c28a
BA		 427
428 .set_load = rpm_reg_set_load,
2720386e
BA		 429};
430
431static struct regulator_ops mV_ops = {
432 .list_voltage = regulator_list_voltage_linear_range,
433
434 .set_voltage_sel = rpm_reg_set_mV_sel,
435 .get_voltage = rpm_reg_get_voltage,
436
437 .enable = rpm_reg_mV_enable,
438 .disable = rpm_reg_mV_disable,
439 .is_enabled = rpm_reg_is_enabled,
2b85c28a
BA		 440
441 .set_load = rpm_reg_set_load,
2720386e
BA		 442};
443
444static struct regulator_ops switch_ops = {
445 .enable = rpm_reg_switch_enable,
446 .disable = rpm_reg_switch_disable,
447 .is_enabled = rpm_reg_is_enabled,
448};
449
450/*
451 * PM8058 regulators
452 */
453static const struct qcom_rpm_reg pm8058_pldo = {
454 .desc.linear_ranges = pldo_ranges,
455 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
456 .desc.n_voltages = 161,
457 .desc.ops = &mV_ops,
458 .parts = &rpm8660_ldo_parts,
459 .supports_force_mode_auto = false,
460 .supports_force_mode_bypass = false,
461};
462
463static const struct qcom_rpm_reg pm8058_nldo = {
464 .desc.linear_ranges = nldo_ranges,
465 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
466 .desc.n_voltages = 64,
467 .desc.ops = &mV_ops,
468 .parts = &rpm8660_ldo_parts,
469 .supports_force_mode_auto = false,
470 .supports_force_mode_bypass = false,
471};
472
473static const struct qcom_rpm_reg pm8058_smps = {
474 .desc.linear_ranges = smps_ranges,
475 .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
476 .desc.n_voltages = 154,
477 .desc.ops = &mV_ops,
478 .parts = &rpm8660_smps_parts,
479 .supports_force_mode_auto = false,
480 .supports_force_mode_bypass = false,
481};
482
483static const struct qcom_rpm_reg pm8058_ncp = {
484 .desc.linear_ranges = ncp_ranges,
485 .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
486 .desc.n_voltages = 32,
487 .desc.ops = &mV_ops,
488 .parts = &rpm8660_ncp_parts,
489};
490
491static const struct qcom_rpm_reg pm8058_switch = {
492 .desc.ops = &switch_ops,
493 .parts = &rpm8660_switch_parts,
494};
495
496/*
497 * PM8901 regulators
498 */
499static const struct qcom_rpm_reg pm8901_pldo = {
500 .desc.linear_ranges = pldo_ranges,
501 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
502 .desc.n_voltages = 161,
503 .desc.ops = &mV_ops,
504 .parts = &rpm8660_ldo_parts,
505 .supports_force_mode_auto = false,
506 .supports_force_mode_bypass = true,
507};
508
509static const struct qcom_rpm_reg pm8901_nldo = {
510 .desc.linear_ranges = nldo_ranges,
511 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
512 .desc.n_voltages = 64,
513 .desc.ops = &mV_ops,
514 .parts = &rpm8660_ldo_parts,
515 .supports_force_mode_auto = false,
516 .supports_force_mode_bypass = true,
517};
518
519static const struct qcom_rpm_reg pm8901_ftsmps = {
520 .desc.linear_ranges = ftsmps_ranges,
521 .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
522 .desc.n_voltages = 101,
523 .desc.ops = &mV_ops,
524 .parts = &rpm8660_smps_parts,
525 .supports_force_mode_auto = true,
526 .supports_force_mode_bypass = false,
527};
528
529static const struct qcom_rpm_reg pm8901_switch = {
530 .desc.ops = &switch_ops,
531 .parts = &rpm8660_switch_parts,
532};
533
534/*
535 * PM8921 regulators
536 */
537static const struct qcom_rpm_reg pm8921_pldo = {
538 .desc.linear_ranges = pldo_ranges,
539 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
540 .desc.n_voltages = 161,
541 .desc.ops = &uV_ops,
542 .parts = &rpm8960_ldo_parts,
543 .supports_force_mode_auto = false,
544 .supports_force_mode_bypass = true,
545};
546
547static const struct qcom_rpm_reg pm8921_nldo = {
548 .desc.linear_ranges = nldo_ranges,
549 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
550 .desc.n_voltages = 64,
551 .desc.ops = &uV_ops,
552 .parts = &rpm8960_ldo_parts,
553 .supports_force_mode_auto = false,
554 .supports_force_mode_bypass = true,
555};
556
557static const struct qcom_rpm_reg pm8921_nldo1200 = {
558 .desc.linear_ranges = nldo1200_ranges,
559 .desc.n_linear_ranges = ARRAY_SIZE(nldo1200_ranges),
560 .desc.n_voltages = 124,
561 .desc.ops = &uV_ops,
562 .parts = &rpm8960_ldo_parts,
563 .supports_force_mode_auto = false,
564 .supports_force_mode_bypass = true,
565};
566
567static const struct qcom_rpm_reg pm8921_smps = {
568 .desc.linear_ranges = smps_ranges,
569 .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
570 .desc.n_voltages = 154,
571 .desc.ops = &uV_ops,
572 .parts = &rpm8960_smps_parts,
573 .supports_force_mode_auto = true,
574 .supports_force_mode_bypass = false,
575};
576
577static const struct qcom_rpm_reg pm8921_ftsmps = {
578 .desc.linear_ranges = ftsmps_ranges,
579 .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
580 .desc.n_voltages = 101,
581 .desc.ops = &uV_ops,
582 .parts = &rpm8960_smps_parts,
583 .supports_force_mode_auto = true,
584 .supports_force_mode_bypass = false,
585};
586
587static const struct qcom_rpm_reg pm8921_ncp = {
588 .desc.linear_ranges = ncp_ranges,
589 .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
590 .desc.n_voltages = 32,
591 .desc.ops = &uV_ops,
592 .parts = &rpm8960_ncp_parts,
593};
594
595static const struct qcom_rpm_reg pm8921_switch = {
596 .desc.ops = &switch_ops,
597 .parts = &rpm8960_switch_parts,
598};
599
0f5bb5b5
JC		 600static const struct qcom_rpm_reg smb208_smps = {
601 .desc.linear_ranges = smb208_ranges,
602 .desc.n_linear_ranges = ARRAY_SIZE(smb208_ranges),
603 .desc.n_voltages = 235,
604 .desc.ops = &uV_ops,
605 .parts = &rpm8960_smps_parts,
606 .supports_force_mode_auto = false,
607 .supports_force_mode_bypass = false,
608};
609
2720386e
BA		 610static const struct of_device_id rpm_of_match[] = {
611 { .compatible = "qcom,rpm-pm8058-pldo", .data = &pm8058_pldo },
612 { .compatible = "qcom,rpm-pm8058-nldo", .data = &pm8058_nldo },
613 { .compatible = "qcom,rpm-pm8058-smps", .data = &pm8058_smps },
614 { .compatible = "qcom,rpm-pm8058-ncp", .data = &pm8058_ncp },
615 { .compatible = "qcom,rpm-pm8058-switch", .data = &pm8058_switch },
616
617 { .compatible = "qcom,rpm-pm8901-pldo", .data = &pm8901_pldo },
618 { .compatible = "qcom,rpm-pm8901-nldo", .data = &pm8901_nldo },
619 { .compatible = "qcom,rpm-pm8901-ftsmps", .data = &pm8901_ftsmps },
620 { .compatible = "qcom,rpm-pm8901-switch", .data = &pm8901_switch },
621
622 { .compatible = "qcom,rpm-pm8921-pldo", .data = &pm8921_pldo },
623 { .compatible = "qcom,rpm-pm8921-nldo", .data = &pm8921_nldo },
624 { .compatible = "qcom,rpm-pm8921-nldo1200", .data = &pm8921_nldo1200 },
625 { .compatible = "qcom,rpm-pm8921-smps", .data = &pm8921_smps },
626 { .compatible = "qcom,rpm-pm8921-ftsmps", .data = &pm8921_ftsmps },
627 { .compatible = "qcom,rpm-pm8921-ncp", .data = &pm8921_ncp },
628 { .compatible = "qcom,rpm-pm8921-switch", .data = &pm8921_switch },
0f5bb5b5
JC		 629
630 { .compatible = "qcom,rpm-smb208", .data = &smb208_smps },
2720386e
BA		 631 { }
632};
633MODULE_DEVICE_TABLE(of, rpm_of_match);
634
635static int rpm_reg_set(struct qcom_rpm_reg *vreg,
636 const struct request_member *req,
637 const int value)
638{
639 if (req->mask == 0 || (value << req->shift) & ~req->mask)
640 return -EINVAL;
641
642 vreg->val[req->word] &= ~req->mask;
643 vreg->val[req->word] |= value << req->shift;
644
645 return 0;
646}
647
648static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg)
649{
650 static const int freq_table[] = {
651 19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000,
652 2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000,
653 1280000, 1200000,
654
655 };
656 const char *key;
657 u32 freq;
658 int ret;
659 int i;
660
661 key = "qcom,switch-mode-frequency";
662 ret = of_property_read_u32(dev->of_node, key, &freq);
663 if (ret) {
664 dev_err(dev, "regulator requires %s property\n", key);
665 return -EINVAL;
666 }
667
668 for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
669 if (freq == freq_table[i]) {
670 rpm_reg_set(vreg, &vreg->parts->freq, i + 1);
671 return 0;
672 }
673 }
674
675 dev_err(dev, "invalid frequency %d\n", freq);
676 return -EINVAL;
677}
678
679static int rpm_reg_probe(struct platform_device *pdev)
680{
681 struct regulator_init_data *initdata;
682 const struct qcom_rpm_reg *template;
683 const struct of_device_id *match;
aad615c6 684 struct regulator_config config = { };
2720386e
BA		 685 struct regulator_dev *rdev;
686 struct qcom_rpm_reg *vreg;
687 const char *key;
688 u32 force_mode;
689 bool pwm;
690 u32 val;
691 int ret;
692
693 match = of_match_device(rpm_of_match, &pdev->dev);
694 template = match->data;
695
2720386e
BA		 696 vreg = devm_kmalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
697 if (!vreg) {
698 dev_err(&pdev->dev, "failed to allocate vreg\n");
699 return -ENOMEM;
700 }
701 memcpy(vreg, template, sizeof(*vreg));
702 mutex_init(&vreg->lock);
703 vreg->dev = &pdev->dev;
704 vreg->desc.id = -1;
705 vreg->desc.owner = THIS_MODULE;
706 vreg->desc.type = REGULATOR_VOLTAGE;
707 vreg->desc.name = pdev->dev.of_node->name;
00cea31f 708 vreg->desc.supply_name = "vin";
2720386e
BA		 709
710 vreg->rpm = dev_get_drvdata(pdev->dev.parent);
711 if (!vreg->rpm) {
712 dev_err(&pdev->dev, "unable to retrieve handle to rpm\n");
713 return -ENODEV;
714 }
715
072e78b1
JMC		 716 initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
717 &vreg->desc);
718 if (!initdata)
719 return -EINVAL;
720
2720386e
BA		 721 key = "reg";
722 ret = of_property_read_u32(pdev->dev.of_node, key, &val);
723 if (ret) {
724 dev_err(&pdev->dev, "failed to read %s\n", key);
725 return ret;
726 }
727 vreg->resource = val;
728
729 if ((vreg->parts->uV.mask || vreg->parts->mV.mask) &&
730 (!initdata->constraints.min_uV || !initdata->constraints.max_uV)) {
731 dev_err(&pdev->dev, "no voltage specified for regulator\n");
732 return -EINVAL;
733 }
734
735 key = "bias-pull-down";
736 if (of_property_read_bool(pdev->dev.of_node, key)) {
737 ret = rpm_reg_set(vreg, &vreg->parts->pd, 1);
738 if (ret) {
739 dev_err(&pdev->dev, "%s is invalid", key);
740 return ret;
741 }
742 }
743
744 if (vreg->parts->freq.mask) {
745 ret = rpm_reg_of_parse_freq(&pdev->dev, vreg);
746 if (ret < 0)
747 return ret;
748 }
749
750 if (vreg->parts->pm.mask) {
751 key = "qcom,power-mode-hysteretic";
752 pwm = !of_property_read_bool(pdev->dev.of_node, key);
753
754 ret = rpm_reg_set(vreg, &vreg->parts->pm, pwm);
755 if (ret) {
756 dev_err(&pdev->dev, "failed to set power mode\n");
757 return ret;
758 }
759 }
760
761 if (vreg->parts->fm.mask) {
762 force_mode = -1;
763
764 key = "qcom,force-mode";
765 ret = of_property_read_u32(pdev->dev.of_node, key, &val);
766 if (ret == -EINVAL) {
767 val = QCOM_RPM_FORCE_MODE_NONE;
768 } else if (ret < 0) {
769 dev_err(&pdev->dev, "failed to read %s\n", key);
770 return ret;
771 }
772
773 /*
774 * If force-mode is encoded as 2 bits then the
775 * possible register values are:
776 * NONE, LPM, HPM
777 * otherwise:
778 * NONE, LPM, AUTO, HPM, BYPASS
779 */
780 switch (val) {
781 case QCOM_RPM_FORCE_MODE_NONE:
782 force_mode = 0;
783 break;
784 case QCOM_RPM_FORCE_MODE_LPM:
785 force_mode = 1;
786 break;
787 case QCOM_RPM_FORCE_MODE_HPM:
788 if (FORCE_MODE_IS_2_BITS(vreg))
789 force_mode = 2;
790 else
791 force_mode = 3;
792 break;
793 case QCOM_RPM_FORCE_MODE_AUTO:
794 if (vreg->supports_force_mode_auto)
795 force_mode = 2;
796 break;
797 case QCOM_RPM_FORCE_MODE_BYPASS:
798 if (vreg->supports_force_mode_bypass)
799 force_mode = 4;
800 break;
801 }
802
a412ec27 803 if (force_mode == -1) {
2720386e
BA		 804 dev_err(&pdev->dev, "invalid force mode\n");
805 return -EINVAL;
806 }
807
808 ret = rpm_reg_set(vreg, &vreg->parts->fm, force_mode);
809 if (ret) {
810 dev_err(&pdev->dev, "failed to set force mode\n");
811 return ret;
812 }
813 }
814
815 config.dev = &pdev->dev;
816 config.init_data = initdata;
817 config.driver_data = vreg;
818 config.of_node = pdev->dev.of_node;
819 rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config);
820 if (IS_ERR(rdev)) {
821 dev_err(&pdev->dev, "can't register regulator\n");
822 return PTR_ERR(rdev);
823 }
824
825 return 0;
826}
827
828static struct platform_driver rpm_reg_driver = {
829 .probe = rpm_reg_probe,
830 .driver = {
831 .name = "qcom_rpm_reg",
2720386e
BA		 832 .of_match_table = of_match_ptr(rpm_of_match),
833 },
834};
835
836static int __init rpm_reg_init(void)
837{
838 return platform_driver_register(&rpm_reg_driver);
839}
840subsys_initcall(rpm_reg_init);
841
842static void __exit rpm_reg_exit(void)
843{
844 platform_driver_unregister(&rpm_reg_driver);
845}
846module_exit(rpm_reg_exit)
847
848MODULE_DESCRIPTION("Qualcomm RPM regulator driver");
849MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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