2 * Copyright (c) 2014, Sony Mobile Communications AB.
3 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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.
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.
15 #include <linux/module.h>
16 #include <linux/platform_device.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>
24 #include <dt-bindings/mfd/qcom-rpm.h>
26 #define MAX_REQUEST_LEN 2
28 struct request_member {
34 struct 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 */
52 #define FORCE_MODE_IS_2_BITS(reg) \
53 (((reg)->parts->fm.mask >> (reg)->parts->fm.shift) == 3)
60 struct regulator_desc desc;
61 const struct rpm_reg_parts *parts;
64 u32 val[MAX_REQUEST_LEN];
69 bool supports_force_mode_auto;
70 bool supports_force_mode_bypass;
73 static const struct rpm_reg_parts rpm8660_ldo_parts = {
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 },
84 static const struct rpm_reg_parts rpm8660_smps_parts = {
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 },
97 static const struct rpm_reg_parts rpm8660_switch_parts = {
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 },
106 static const struct rpm_reg_parts rpm8660_ncp_parts = {
108 .mV = { 0, 0x00000FFF, 0 },
109 .enable_state = { 0, 0x00001000, 12 },
110 .comp_mode = { 0, 0x00002000, 13 },
111 .freq = { 0, 0x003FC000, 14 },
114 static const struct rpm_reg_parts rpm8960_ldo_parts = {
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 },
125 static const struct rpm_reg_parts rpm8960_smps_parts = {
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 },
139 static const struct rpm_reg_parts rpm8960_switch_parts = {
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 },
148 static const struct rpm_reg_parts rpm8960_ncp_parts = {
150 .uV = { 0, 0x007FFFFF, 0 },
151 .enable_state = { 0, 0x00800000, 23 },
152 .comp_mode = { 0, 0x01000000, 24 },
153 .freq = { 0, 0x3E000000, 25 },
157 * Physically available PMIC regulator voltage ranges
159 static 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),
165 static const struct regulator_linear_range nldo_ranges[] = {
166 REGULATOR_LINEAR_RANGE( 750000, 0, 63, 12500),
169 static const struct regulator_linear_range nldo1200_ranges[] = {
170 REGULATOR_LINEAR_RANGE( 375000, 0, 59, 6250),
171 REGULATOR_LINEAR_RANGE( 750000, 60, 123, 12500),
174 static 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),
180 static 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),
186 static const struct regulator_linear_range ncp_ranges[] = {
187 REGULATOR_LINEAR_RANGE(1500000, 0, 31, 50000),
190 static int rpm_reg_write(struct qcom_rpm_reg *vreg,
191 const struct request_member *req,
194 if (WARN_ON((value << req->shift) & ~req->mask))
197 vreg->val[req->word] &= ~req->mask;
198 vreg->val[req->word] |= value << req->shift;
200 return qcom_rpm_write(vreg->rpm,
203 vreg->parts->request_len);
206 static int rpm_reg_set_mV_sel(struct regulator_dev *rdev,
209 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
210 const struct rpm_reg_parts *parts = vreg->parts;
211 const struct request_member *req = &parts->mV;
218 uV = regulator_list_voltage_linear_range(rdev, selector);
222 mutex_lock(&vreg->lock);
224 if (vreg->is_enabled)
225 ret = rpm_reg_write(vreg, req, vreg->uV / 1000);
226 mutex_unlock(&vreg->lock);
231 static int rpm_reg_set_uV_sel(struct regulator_dev *rdev,
234 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
235 const struct rpm_reg_parts *parts = vreg->parts;
236 const struct request_member *req = &parts->uV;
243 uV = regulator_list_voltage_linear_range(rdev, selector);
247 mutex_lock(&vreg->lock);
249 if (vreg->is_enabled)
250 ret = rpm_reg_write(vreg, req, vreg->uV);
251 mutex_unlock(&vreg->lock);
256 static int rpm_reg_get_voltage(struct regulator_dev *rdev)
258 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
263 static int rpm_reg_mV_enable(struct regulator_dev *rdev)
265 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
266 const struct rpm_reg_parts *parts = vreg->parts;
267 const struct request_member *req = &parts->mV;
273 mutex_lock(&vreg->lock);
274 ret = rpm_reg_write(vreg, req, vreg->uV / 1000);
276 vreg->is_enabled = 1;
277 mutex_unlock(&vreg->lock);
282 static int rpm_reg_uV_enable(struct regulator_dev *rdev)
284 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
285 const struct rpm_reg_parts *parts = vreg->parts;
286 const struct request_member *req = &parts->uV;
292 mutex_lock(&vreg->lock);
293 ret = rpm_reg_write(vreg, req, vreg->uV);
295 vreg->is_enabled = 1;
296 mutex_unlock(&vreg->lock);
301 static int rpm_reg_switch_enable(struct regulator_dev *rdev)
303 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
304 const struct rpm_reg_parts *parts = vreg->parts;
305 const struct request_member *req = &parts->enable_state;
311 mutex_lock(&vreg->lock);
312 ret = rpm_reg_write(vreg, req, 1);
314 vreg->is_enabled = 1;
315 mutex_unlock(&vreg->lock);
320 static int rpm_reg_mV_disable(struct regulator_dev *rdev)
322 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
323 const struct rpm_reg_parts *parts = vreg->parts;
324 const struct request_member *req = &parts->mV;
330 mutex_lock(&vreg->lock);
331 ret = rpm_reg_write(vreg, req, 0);
333 vreg->is_enabled = 0;
334 mutex_unlock(&vreg->lock);
339 static int rpm_reg_uV_disable(struct regulator_dev *rdev)
341 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
342 const struct rpm_reg_parts *parts = vreg->parts;
343 const struct request_member *req = &parts->uV;
349 mutex_lock(&vreg->lock);
350 ret = rpm_reg_write(vreg, req, 0);
352 vreg->is_enabled = 0;
353 mutex_unlock(&vreg->lock);
358 static int rpm_reg_switch_disable(struct regulator_dev *rdev)
360 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
361 const struct rpm_reg_parts *parts = vreg->parts;
362 const struct request_member *req = &parts->enable_state;
368 mutex_lock(&vreg->lock);
369 ret = rpm_reg_write(vreg, req, 0);
371 vreg->is_enabled = 0;
372 mutex_unlock(&vreg->lock);
377 static int rpm_reg_is_enabled(struct regulator_dev *rdev)
379 struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
381 return vreg->is_enabled;
384 static struct regulator_ops uV_ops = {
385 .list_voltage = regulator_list_voltage_linear_range,
387 .set_voltage_sel = rpm_reg_set_uV_sel,
388 .get_voltage = rpm_reg_get_voltage,
390 .enable = rpm_reg_uV_enable,
391 .disable = rpm_reg_uV_disable,
392 .is_enabled = rpm_reg_is_enabled,
395 static struct regulator_ops mV_ops = {
396 .list_voltage = regulator_list_voltage_linear_range,
398 .set_voltage_sel = rpm_reg_set_mV_sel,
399 .get_voltage = rpm_reg_get_voltage,
401 .enable = rpm_reg_mV_enable,
402 .disable = rpm_reg_mV_disable,
403 .is_enabled = rpm_reg_is_enabled,
406 static struct regulator_ops switch_ops = {
407 .enable = rpm_reg_switch_enable,
408 .disable = rpm_reg_switch_disable,
409 .is_enabled = rpm_reg_is_enabled,
415 static const struct qcom_rpm_reg pm8058_pldo = {
416 .desc.linear_ranges = pldo_ranges,
417 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
418 .desc.n_voltages = 161,
420 .parts = &rpm8660_ldo_parts,
421 .supports_force_mode_auto = false,
422 .supports_force_mode_bypass = false,
425 static const struct qcom_rpm_reg pm8058_nldo = {
426 .desc.linear_ranges = nldo_ranges,
427 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
428 .desc.n_voltages = 64,
430 .parts = &rpm8660_ldo_parts,
431 .supports_force_mode_auto = false,
432 .supports_force_mode_bypass = false,
435 static const struct qcom_rpm_reg pm8058_smps = {
436 .desc.linear_ranges = smps_ranges,
437 .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
438 .desc.n_voltages = 154,
440 .parts = &rpm8660_smps_parts,
441 .supports_force_mode_auto = false,
442 .supports_force_mode_bypass = false,
445 static const struct qcom_rpm_reg pm8058_ncp = {
446 .desc.linear_ranges = ncp_ranges,
447 .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
448 .desc.n_voltages = 32,
450 .parts = &rpm8660_ncp_parts,
453 static const struct qcom_rpm_reg pm8058_switch = {
454 .desc.ops = &switch_ops,
455 .parts = &rpm8660_switch_parts,
461 static const struct qcom_rpm_reg pm8901_pldo = {
462 .desc.linear_ranges = pldo_ranges,
463 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
464 .desc.n_voltages = 161,
466 .parts = &rpm8660_ldo_parts,
467 .supports_force_mode_auto = false,
468 .supports_force_mode_bypass = true,
471 static const struct qcom_rpm_reg pm8901_nldo = {
472 .desc.linear_ranges = nldo_ranges,
473 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
474 .desc.n_voltages = 64,
476 .parts = &rpm8660_ldo_parts,
477 .supports_force_mode_auto = false,
478 .supports_force_mode_bypass = true,
481 static const struct qcom_rpm_reg pm8901_ftsmps = {
482 .desc.linear_ranges = ftsmps_ranges,
483 .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
484 .desc.n_voltages = 101,
486 .parts = &rpm8660_smps_parts,
487 .supports_force_mode_auto = true,
488 .supports_force_mode_bypass = false,
491 static const struct qcom_rpm_reg pm8901_switch = {
492 .desc.ops = &switch_ops,
493 .parts = &rpm8660_switch_parts,
499 static const struct qcom_rpm_reg pm8921_pldo = {
500 .desc.linear_ranges = pldo_ranges,
501 .desc.n_linear_ranges = ARRAY_SIZE(pldo_ranges),
502 .desc.n_voltages = 161,
504 .parts = &rpm8960_ldo_parts,
505 .supports_force_mode_auto = false,
506 .supports_force_mode_bypass = true,
509 static const struct qcom_rpm_reg pm8921_nldo = {
510 .desc.linear_ranges = nldo_ranges,
511 .desc.n_linear_ranges = ARRAY_SIZE(nldo_ranges),
512 .desc.n_voltages = 64,
514 .parts = &rpm8960_ldo_parts,
515 .supports_force_mode_auto = false,
516 .supports_force_mode_bypass = true,
519 static const struct qcom_rpm_reg pm8921_nldo1200 = {
520 .desc.linear_ranges = nldo1200_ranges,
521 .desc.n_linear_ranges = ARRAY_SIZE(nldo1200_ranges),
522 .desc.n_voltages = 124,
524 .parts = &rpm8960_ldo_parts,
525 .supports_force_mode_auto = false,
526 .supports_force_mode_bypass = true,
529 static const struct qcom_rpm_reg pm8921_smps = {
530 .desc.linear_ranges = smps_ranges,
531 .desc.n_linear_ranges = ARRAY_SIZE(smps_ranges),
532 .desc.n_voltages = 154,
534 .parts = &rpm8960_smps_parts,
535 .supports_force_mode_auto = true,
536 .supports_force_mode_bypass = false,
539 static const struct qcom_rpm_reg pm8921_ftsmps = {
540 .desc.linear_ranges = ftsmps_ranges,
541 .desc.n_linear_ranges = ARRAY_SIZE(ftsmps_ranges),
542 .desc.n_voltages = 101,
544 .parts = &rpm8960_smps_parts,
545 .supports_force_mode_auto = true,
546 .supports_force_mode_bypass = false,
549 static const struct qcom_rpm_reg pm8921_ncp = {
550 .desc.linear_ranges = ncp_ranges,
551 .desc.n_linear_ranges = ARRAY_SIZE(ncp_ranges),
552 .desc.n_voltages = 32,
554 .parts = &rpm8960_ncp_parts,
557 static const struct qcom_rpm_reg pm8921_switch = {
558 .desc.ops = &switch_ops,
559 .parts = &rpm8960_switch_parts,
562 static const struct of_device_id rpm_of_match[] = {
563 { .compatible = "qcom,rpm-pm8058-pldo", .data = &pm8058_pldo },
564 { .compatible = "qcom,rpm-pm8058-nldo", .data = &pm8058_nldo },
565 { .compatible = "qcom,rpm-pm8058-smps", .data = &pm8058_smps },
566 { .compatible = "qcom,rpm-pm8058-ncp", .data = &pm8058_ncp },
567 { .compatible = "qcom,rpm-pm8058-switch", .data = &pm8058_switch },
569 { .compatible = "qcom,rpm-pm8901-pldo", .data = &pm8901_pldo },
570 { .compatible = "qcom,rpm-pm8901-nldo", .data = &pm8901_nldo },
571 { .compatible = "qcom,rpm-pm8901-ftsmps", .data = &pm8901_ftsmps },
572 { .compatible = "qcom,rpm-pm8901-switch", .data = &pm8901_switch },
574 { .compatible = "qcom,rpm-pm8921-pldo", .data = &pm8921_pldo },
575 { .compatible = "qcom,rpm-pm8921-nldo", .data = &pm8921_nldo },
576 { .compatible = "qcom,rpm-pm8921-nldo1200", .data = &pm8921_nldo1200 },
577 { .compatible = "qcom,rpm-pm8921-smps", .data = &pm8921_smps },
578 { .compatible = "qcom,rpm-pm8921-ftsmps", .data = &pm8921_ftsmps },
579 { .compatible = "qcom,rpm-pm8921-ncp", .data = &pm8921_ncp },
580 { .compatible = "qcom,rpm-pm8921-switch", .data = &pm8921_switch },
583 MODULE_DEVICE_TABLE(of, rpm_of_match);
585 static int rpm_reg_set(struct qcom_rpm_reg *vreg,
586 const struct request_member *req,
589 if (req->mask == 0 || (value << req->shift) & ~req->mask)
592 vreg->val[req->word] &= ~req->mask;
593 vreg->val[req->word] |= value << req->shift;
598 static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg)
600 static const int freq_table[] = {
601 19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000,
602 2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000,
611 key = "qcom,switch-mode-frequency";
612 ret = of_property_read_u32(dev->of_node, key, &freq);
614 dev_err(dev, "regulator requires %s property\n", key);
618 for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
619 if (freq == freq_table[i]) {
620 rpm_reg_set(vreg, &vreg->parts->freq, i + 1);
625 dev_err(dev, "invalid frequency %d\n", freq);
629 static int rpm_reg_probe(struct platform_device *pdev)
631 struct regulator_init_data *initdata;
632 const struct qcom_rpm_reg *template;
633 const struct of_device_id *match;
634 struct regulator_config config = { };
635 struct regulator_dev *rdev;
636 struct qcom_rpm_reg *vreg;
643 match = of_match_device(rpm_of_match, &pdev->dev);
644 template = match->data;
646 initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node);
650 vreg = devm_kmalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
652 dev_err(&pdev->dev, "failed to allocate vreg\n");
655 memcpy(vreg, template, sizeof(*vreg));
656 mutex_init(&vreg->lock);
657 vreg->dev = &pdev->dev;
659 vreg->desc.owner = THIS_MODULE;
660 vreg->desc.type = REGULATOR_VOLTAGE;
661 vreg->desc.name = pdev->dev.of_node->name;
663 vreg->rpm = dev_get_drvdata(pdev->dev.parent);
665 dev_err(&pdev->dev, "unable to retrieve handle to rpm\n");
670 ret = of_property_read_u32(pdev->dev.of_node, key, &val);
672 dev_err(&pdev->dev, "failed to read %s\n", key);
675 vreg->resource = val;
677 if ((vreg->parts->uV.mask || vreg->parts->mV.mask) &&
678 (!initdata->constraints.min_uV || !initdata->constraints.max_uV)) {
679 dev_err(&pdev->dev, "no voltage specified for regulator\n");
683 key = "bias-pull-down";
684 if (of_property_read_bool(pdev->dev.of_node, key)) {
685 ret = rpm_reg_set(vreg, &vreg->parts->pd, 1);
687 dev_err(&pdev->dev, "%s is invalid", key);
692 if (vreg->parts->freq.mask) {
693 ret = rpm_reg_of_parse_freq(&pdev->dev, vreg);
698 if (vreg->parts->pm.mask) {
699 key = "qcom,power-mode-hysteretic";
700 pwm = !of_property_read_bool(pdev->dev.of_node, key);
702 ret = rpm_reg_set(vreg, &vreg->parts->pm, pwm);
704 dev_err(&pdev->dev, "failed to set power mode\n");
709 if (vreg->parts->fm.mask) {
712 key = "qcom,force-mode";
713 ret = of_property_read_u32(pdev->dev.of_node, key, &val);
714 if (ret == -EINVAL) {
715 val = QCOM_RPM_FORCE_MODE_NONE;
716 } else if (ret < 0) {
717 dev_err(&pdev->dev, "failed to read %s\n", key);
722 * If force-mode is encoded as 2 bits then the
723 * possible register values are:
726 * NONE, LPM, AUTO, HPM, BYPASS
729 case QCOM_RPM_FORCE_MODE_NONE:
732 case QCOM_RPM_FORCE_MODE_LPM:
735 case QCOM_RPM_FORCE_MODE_HPM:
736 if (FORCE_MODE_IS_2_BITS(vreg))
741 case QCOM_RPM_FORCE_MODE_AUTO:
742 if (vreg->supports_force_mode_auto)
745 case QCOM_RPM_FORCE_MODE_BYPASS:
746 if (vreg->supports_force_mode_bypass)
751 if (force_mode < 0) {
752 dev_err(&pdev->dev, "invalid force mode\n");
756 ret = rpm_reg_set(vreg, &vreg->parts->fm, force_mode);
758 dev_err(&pdev->dev, "failed to set force mode\n");
763 config.dev = &pdev->dev;
764 config.init_data = initdata;
765 config.driver_data = vreg;
766 config.of_node = pdev->dev.of_node;
767 rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config);
769 dev_err(&pdev->dev, "can't register regulator\n");
770 return PTR_ERR(rdev);
776 static struct platform_driver rpm_reg_driver = {
777 .probe = rpm_reg_probe,
779 .name = "qcom_rpm_reg",
780 .owner = THIS_MODULE,
781 .of_match_table = of_match_ptr(rpm_of_match),
785 static int __init rpm_reg_init(void)
787 return platform_driver_register(&rpm_reg_driver);
789 subsys_initcall(rpm_reg_init);
791 static void __exit rpm_reg_exit(void)
793 platform_driver_unregister(&rpm_reg_driver);
795 module_exit(rpm_reg_exit)
797 MODULE_DESCRIPTION("Qualcomm RPM regulator driver");
798 MODULE_LICENSE("GPL v2");