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 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),
193 static const struct regulator_linear_range ncp_ranges
[] = {
194 REGULATOR_LINEAR_RANGE(1500000, 0, 31, 50000),
197 static int rpm_reg_write(struct qcom_rpm_reg
*vreg
,
198 const struct request_member
*req
,
201 if (WARN_ON((value
<< req
->shift
) & ~req
->mask
))
204 vreg
->val
[req
->word
] &= ~req
->mask
;
205 vreg
->val
[req
->word
] |= value
<< req
->shift
;
207 return qcom_rpm_write(vreg
->rpm
,
210 vreg
->parts
->request_len
);
213 static int rpm_reg_set_mV_sel(struct regulator_dev
*rdev
,
216 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
217 const struct rpm_reg_parts
*parts
= vreg
->parts
;
218 const struct request_member
*req
= &parts
->mV
;
225 uV
= regulator_list_voltage_linear_range(rdev
, selector
);
229 mutex_lock(&vreg
->lock
);
230 if (vreg
->is_enabled
)
231 ret
= rpm_reg_write(vreg
, req
, uV
/ 1000);
235 mutex_unlock(&vreg
->lock
);
240 static int rpm_reg_set_uV_sel(struct regulator_dev
*rdev
,
243 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
244 const struct rpm_reg_parts
*parts
= vreg
->parts
;
245 const struct request_member
*req
= &parts
->uV
;
252 uV
= regulator_list_voltage_linear_range(rdev
, selector
);
256 mutex_lock(&vreg
->lock
);
257 if (vreg
->is_enabled
)
258 ret
= rpm_reg_write(vreg
, req
, uV
);
262 mutex_unlock(&vreg
->lock
);
267 static int rpm_reg_get_voltage(struct regulator_dev
*rdev
)
269 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
274 static int rpm_reg_mV_enable(struct regulator_dev
*rdev
)
276 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
277 const struct rpm_reg_parts
*parts
= vreg
->parts
;
278 const struct request_member
*req
= &parts
->mV
;
284 mutex_lock(&vreg
->lock
);
285 ret
= rpm_reg_write(vreg
, req
, vreg
->uV
/ 1000);
287 vreg
->is_enabled
= 1;
288 mutex_unlock(&vreg
->lock
);
293 static int rpm_reg_uV_enable(struct regulator_dev
*rdev
)
295 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
296 const struct rpm_reg_parts
*parts
= vreg
->parts
;
297 const struct request_member
*req
= &parts
->uV
;
303 mutex_lock(&vreg
->lock
);
304 ret
= rpm_reg_write(vreg
, req
, vreg
->uV
);
306 vreg
->is_enabled
= 1;
307 mutex_unlock(&vreg
->lock
);
312 static int rpm_reg_switch_enable(struct regulator_dev
*rdev
)
314 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
315 const struct rpm_reg_parts
*parts
= vreg
->parts
;
316 const struct request_member
*req
= &parts
->enable_state
;
322 mutex_lock(&vreg
->lock
);
323 ret
= rpm_reg_write(vreg
, req
, 1);
325 vreg
->is_enabled
= 1;
326 mutex_unlock(&vreg
->lock
);
331 static int rpm_reg_mV_disable(struct regulator_dev
*rdev
)
333 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
334 const struct rpm_reg_parts
*parts
= vreg
->parts
;
335 const struct request_member
*req
= &parts
->mV
;
341 mutex_lock(&vreg
->lock
);
342 ret
= rpm_reg_write(vreg
, req
, 0);
344 vreg
->is_enabled
= 0;
345 mutex_unlock(&vreg
->lock
);
350 static int rpm_reg_uV_disable(struct regulator_dev
*rdev
)
352 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
353 const struct rpm_reg_parts
*parts
= vreg
->parts
;
354 const struct request_member
*req
= &parts
->uV
;
360 mutex_lock(&vreg
->lock
);
361 ret
= rpm_reg_write(vreg
, req
, 0);
363 vreg
->is_enabled
= 0;
364 mutex_unlock(&vreg
->lock
);
369 static int rpm_reg_switch_disable(struct regulator_dev
*rdev
)
371 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
372 const struct rpm_reg_parts
*parts
= vreg
->parts
;
373 const struct request_member
*req
= &parts
->enable_state
;
379 mutex_lock(&vreg
->lock
);
380 ret
= rpm_reg_write(vreg
, req
, 0);
382 vreg
->is_enabled
= 0;
383 mutex_unlock(&vreg
->lock
);
388 static int rpm_reg_is_enabled(struct regulator_dev
*rdev
)
390 struct qcom_rpm_reg
*vreg
= rdev_get_drvdata(rdev
);
392 return vreg
->is_enabled
;
395 static struct regulator_ops uV_ops
= {
396 .list_voltage
= regulator_list_voltage_linear_range
,
398 .set_voltage_sel
= rpm_reg_set_uV_sel
,
399 .get_voltage
= rpm_reg_get_voltage
,
401 .enable
= rpm_reg_uV_enable
,
402 .disable
= rpm_reg_uV_disable
,
403 .is_enabled
= rpm_reg_is_enabled
,
406 static struct regulator_ops mV_ops
= {
407 .list_voltage
= regulator_list_voltage_linear_range
,
409 .set_voltage_sel
= rpm_reg_set_mV_sel
,
410 .get_voltage
= rpm_reg_get_voltage
,
412 .enable
= rpm_reg_mV_enable
,
413 .disable
= rpm_reg_mV_disable
,
414 .is_enabled
= rpm_reg_is_enabled
,
417 static struct regulator_ops switch_ops
= {
418 .enable
= rpm_reg_switch_enable
,
419 .disable
= rpm_reg_switch_disable
,
420 .is_enabled
= rpm_reg_is_enabled
,
426 static const struct qcom_rpm_reg pm8058_pldo
= {
427 .desc
.linear_ranges
= pldo_ranges
,
428 .desc
.n_linear_ranges
= ARRAY_SIZE(pldo_ranges
),
429 .desc
.n_voltages
= 161,
431 .parts
= &rpm8660_ldo_parts
,
432 .supports_force_mode_auto
= false,
433 .supports_force_mode_bypass
= false,
436 static const struct qcom_rpm_reg pm8058_nldo
= {
437 .desc
.linear_ranges
= nldo_ranges
,
438 .desc
.n_linear_ranges
= ARRAY_SIZE(nldo_ranges
),
439 .desc
.n_voltages
= 64,
441 .parts
= &rpm8660_ldo_parts
,
442 .supports_force_mode_auto
= false,
443 .supports_force_mode_bypass
= false,
446 static const struct qcom_rpm_reg pm8058_smps
= {
447 .desc
.linear_ranges
= smps_ranges
,
448 .desc
.n_linear_ranges
= ARRAY_SIZE(smps_ranges
),
449 .desc
.n_voltages
= 154,
451 .parts
= &rpm8660_smps_parts
,
452 .supports_force_mode_auto
= false,
453 .supports_force_mode_bypass
= false,
456 static const struct qcom_rpm_reg pm8058_ncp
= {
457 .desc
.linear_ranges
= ncp_ranges
,
458 .desc
.n_linear_ranges
= ARRAY_SIZE(ncp_ranges
),
459 .desc
.n_voltages
= 32,
461 .parts
= &rpm8660_ncp_parts
,
464 static const struct qcom_rpm_reg pm8058_switch
= {
465 .desc
.ops
= &switch_ops
,
466 .parts
= &rpm8660_switch_parts
,
472 static const struct qcom_rpm_reg pm8901_pldo
= {
473 .desc
.linear_ranges
= pldo_ranges
,
474 .desc
.n_linear_ranges
= ARRAY_SIZE(pldo_ranges
),
475 .desc
.n_voltages
= 161,
477 .parts
= &rpm8660_ldo_parts
,
478 .supports_force_mode_auto
= false,
479 .supports_force_mode_bypass
= true,
482 static const struct qcom_rpm_reg pm8901_nldo
= {
483 .desc
.linear_ranges
= nldo_ranges
,
484 .desc
.n_linear_ranges
= ARRAY_SIZE(nldo_ranges
),
485 .desc
.n_voltages
= 64,
487 .parts
= &rpm8660_ldo_parts
,
488 .supports_force_mode_auto
= false,
489 .supports_force_mode_bypass
= true,
492 static const struct qcom_rpm_reg pm8901_ftsmps
= {
493 .desc
.linear_ranges
= ftsmps_ranges
,
494 .desc
.n_linear_ranges
= ARRAY_SIZE(ftsmps_ranges
),
495 .desc
.n_voltages
= 101,
497 .parts
= &rpm8660_smps_parts
,
498 .supports_force_mode_auto
= true,
499 .supports_force_mode_bypass
= false,
502 static const struct qcom_rpm_reg pm8901_switch
= {
503 .desc
.ops
= &switch_ops
,
504 .parts
= &rpm8660_switch_parts
,
510 static const struct qcom_rpm_reg pm8921_pldo
= {
511 .desc
.linear_ranges
= pldo_ranges
,
512 .desc
.n_linear_ranges
= ARRAY_SIZE(pldo_ranges
),
513 .desc
.n_voltages
= 161,
515 .parts
= &rpm8960_ldo_parts
,
516 .supports_force_mode_auto
= false,
517 .supports_force_mode_bypass
= true,
520 static const struct qcom_rpm_reg pm8921_nldo
= {
521 .desc
.linear_ranges
= nldo_ranges
,
522 .desc
.n_linear_ranges
= ARRAY_SIZE(nldo_ranges
),
523 .desc
.n_voltages
= 64,
525 .parts
= &rpm8960_ldo_parts
,
526 .supports_force_mode_auto
= false,
527 .supports_force_mode_bypass
= true,
530 static const struct qcom_rpm_reg pm8921_nldo1200
= {
531 .desc
.linear_ranges
= nldo1200_ranges
,
532 .desc
.n_linear_ranges
= ARRAY_SIZE(nldo1200_ranges
),
533 .desc
.n_voltages
= 124,
535 .parts
= &rpm8960_ldo_parts
,
536 .supports_force_mode_auto
= false,
537 .supports_force_mode_bypass
= true,
540 static const struct qcom_rpm_reg pm8921_smps
= {
541 .desc
.linear_ranges
= smps_ranges
,
542 .desc
.n_linear_ranges
= ARRAY_SIZE(smps_ranges
),
543 .desc
.n_voltages
= 154,
545 .parts
= &rpm8960_smps_parts
,
546 .supports_force_mode_auto
= true,
547 .supports_force_mode_bypass
= false,
550 static const struct qcom_rpm_reg pm8921_ftsmps
= {
551 .desc
.linear_ranges
= ftsmps_ranges
,
552 .desc
.n_linear_ranges
= ARRAY_SIZE(ftsmps_ranges
),
553 .desc
.n_voltages
= 101,
555 .parts
= &rpm8960_smps_parts
,
556 .supports_force_mode_auto
= true,
557 .supports_force_mode_bypass
= false,
560 static const struct qcom_rpm_reg pm8921_ncp
= {
561 .desc
.linear_ranges
= ncp_ranges
,
562 .desc
.n_linear_ranges
= ARRAY_SIZE(ncp_ranges
),
563 .desc
.n_voltages
= 32,
565 .parts
= &rpm8960_ncp_parts
,
568 static const struct qcom_rpm_reg pm8921_switch
= {
569 .desc
.ops
= &switch_ops
,
570 .parts
= &rpm8960_switch_parts
,
573 static const struct qcom_rpm_reg smb208_smps
= {
574 .desc
.linear_ranges
= smb208_ranges
,
575 .desc
.n_linear_ranges
= ARRAY_SIZE(smb208_ranges
),
576 .desc
.n_voltages
= 235,
578 .parts
= &rpm8960_smps_parts
,
579 .supports_force_mode_auto
= false,
580 .supports_force_mode_bypass
= false,
583 static const struct of_device_id rpm_of_match
[] = {
584 { .compatible
= "qcom,rpm-pm8058-pldo", .data
= &pm8058_pldo
},
585 { .compatible
= "qcom,rpm-pm8058-nldo", .data
= &pm8058_nldo
},
586 { .compatible
= "qcom,rpm-pm8058-smps", .data
= &pm8058_smps
},
587 { .compatible
= "qcom,rpm-pm8058-ncp", .data
= &pm8058_ncp
},
588 { .compatible
= "qcom,rpm-pm8058-switch", .data
= &pm8058_switch
},
590 { .compatible
= "qcom,rpm-pm8901-pldo", .data
= &pm8901_pldo
},
591 { .compatible
= "qcom,rpm-pm8901-nldo", .data
= &pm8901_nldo
},
592 { .compatible
= "qcom,rpm-pm8901-ftsmps", .data
= &pm8901_ftsmps
},
593 { .compatible
= "qcom,rpm-pm8901-switch", .data
= &pm8901_switch
},
595 { .compatible
= "qcom,rpm-pm8921-pldo", .data
= &pm8921_pldo
},
596 { .compatible
= "qcom,rpm-pm8921-nldo", .data
= &pm8921_nldo
},
597 { .compatible
= "qcom,rpm-pm8921-nldo1200", .data
= &pm8921_nldo1200
},
598 { .compatible
= "qcom,rpm-pm8921-smps", .data
= &pm8921_smps
},
599 { .compatible
= "qcom,rpm-pm8921-ftsmps", .data
= &pm8921_ftsmps
},
600 { .compatible
= "qcom,rpm-pm8921-ncp", .data
= &pm8921_ncp
},
601 { .compatible
= "qcom,rpm-pm8921-switch", .data
= &pm8921_switch
},
603 { .compatible
= "qcom,rpm-smb208", .data
= &smb208_smps
},
606 MODULE_DEVICE_TABLE(of
, rpm_of_match
);
608 static int rpm_reg_set(struct qcom_rpm_reg
*vreg
,
609 const struct request_member
*req
,
612 if (req
->mask
== 0 || (value
<< req
->shift
) & ~req
->mask
)
615 vreg
->val
[req
->word
] &= ~req
->mask
;
616 vreg
->val
[req
->word
] |= value
<< req
->shift
;
621 static int rpm_reg_of_parse_freq(struct device
*dev
, struct qcom_rpm_reg
*vreg
)
623 static const int freq_table
[] = {
624 19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000,
625 2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000,
634 key
= "qcom,switch-mode-frequency";
635 ret
= of_property_read_u32(dev
->of_node
, key
, &freq
);
637 dev_err(dev
, "regulator requires %s property\n", key
);
641 for (i
= 0; i
< ARRAY_SIZE(freq_table
); i
++) {
642 if (freq
== freq_table
[i
]) {
643 rpm_reg_set(vreg
, &vreg
->parts
->freq
, i
+ 1);
648 dev_err(dev
, "invalid frequency %d\n", freq
);
652 static int rpm_reg_probe(struct platform_device
*pdev
)
654 struct regulator_init_data
*initdata
;
655 const struct qcom_rpm_reg
*template;
656 const struct of_device_id
*match
;
657 struct regulator_config config
= { };
658 struct regulator_dev
*rdev
;
659 struct qcom_rpm_reg
*vreg
;
666 match
= of_match_device(rpm_of_match
, &pdev
->dev
);
667 template = match
->data
;
669 vreg
= devm_kmalloc(&pdev
->dev
, sizeof(*vreg
), GFP_KERNEL
);
671 dev_err(&pdev
->dev
, "failed to allocate vreg\n");
674 memcpy(vreg
, template, sizeof(*vreg
));
675 mutex_init(&vreg
->lock
);
676 vreg
->dev
= &pdev
->dev
;
678 vreg
->desc
.owner
= THIS_MODULE
;
679 vreg
->desc
.type
= REGULATOR_VOLTAGE
;
680 vreg
->desc
.name
= pdev
->dev
.of_node
->name
;
681 vreg
->desc
.supply_name
= "vin";
683 vreg
->rpm
= dev_get_drvdata(pdev
->dev
.parent
);
685 dev_err(&pdev
->dev
, "unable to retrieve handle to rpm\n");
689 initdata
= of_get_regulator_init_data(&pdev
->dev
, pdev
->dev
.of_node
,
695 ret
= of_property_read_u32(pdev
->dev
.of_node
, key
, &val
);
697 dev_err(&pdev
->dev
, "failed to read %s\n", key
);
700 vreg
->resource
= val
;
702 if ((vreg
->parts
->uV
.mask
|| vreg
->parts
->mV
.mask
) &&
703 (!initdata
->constraints
.min_uV
|| !initdata
->constraints
.max_uV
)) {
704 dev_err(&pdev
->dev
, "no voltage specified for regulator\n");
708 key
= "bias-pull-down";
709 if (of_property_read_bool(pdev
->dev
.of_node
, key
)) {
710 ret
= rpm_reg_set(vreg
, &vreg
->parts
->pd
, 1);
712 dev_err(&pdev
->dev
, "%s is invalid", key
);
717 if (vreg
->parts
->freq
.mask
) {
718 ret
= rpm_reg_of_parse_freq(&pdev
->dev
, vreg
);
723 if (vreg
->parts
->pm
.mask
) {
724 key
= "qcom,power-mode-hysteretic";
725 pwm
= !of_property_read_bool(pdev
->dev
.of_node
, key
);
727 ret
= rpm_reg_set(vreg
, &vreg
->parts
->pm
, pwm
);
729 dev_err(&pdev
->dev
, "failed to set power mode\n");
734 if (vreg
->parts
->fm
.mask
) {
737 key
= "qcom,force-mode";
738 ret
= of_property_read_u32(pdev
->dev
.of_node
, key
, &val
);
739 if (ret
== -EINVAL
) {
740 val
= QCOM_RPM_FORCE_MODE_NONE
;
741 } else if (ret
< 0) {
742 dev_err(&pdev
->dev
, "failed to read %s\n", key
);
747 * If force-mode is encoded as 2 bits then the
748 * possible register values are:
751 * NONE, LPM, AUTO, HPM, BYPASS
754 case QCOM_RPM_FORCE_MODE_NONE
:
757 case QCOM_RPM_FORCE_MODE_LPM
:
760 case QCOM_RPM_FORCE_MODE_HPM
:
761 if (FORCE_MODE_IS_2_BITS(vreg
))
766 case QCOM_RPM_FORCE_MODE_AUTO
:
767 if (vreg
->supports_force_mode_auto
)
770 case QCOM_RPM_FORCE_MODE_BYPASS
:
771 if (vreg
->supports_force_mode_bypass
)
776 if (force_mode
== -1) {
777 dev_err(&pdev
->dev
, "invalid force mode\n");
781 ret
= rpm_reg_set(vreg
, &vreg
->parts
->fm
, force_mode
);
783 dev_err(&pdev
->dev
, "failed to set force mode\n");
788 config
.dev
= &pdev
->dev
;
789 config
.init_data
= initdata
;
790 config
.driver_data
= vreg
;
791 config
.of_node
= pdev
->dev
.of_node
;
792 rdev
= devm_regulator_register(&pdev
->dev
, &vreg
->desc
, &config
);
794 dev_err(&pdev
->dev
, "can't register regulator\n");
795 return PTR_ERR(rdev
);
801 static struct platform_driver rpm_reg_driver
= {
802 .probe
= rpm_reg_probe
,
804 .name
= "qcom_rpm_reg",
805 .of_match_table
= of_match_ptr(rpm_of_match
),
809 static int __init
rpm_reg_init(void)
811 return platform_driver_register(&rpm_reg_driver
);
813 subsys_initcall(rpm_reg_init
);
815 static void __exit
rpm_reg_exit(void)
817 platform_driver_unregister(&rpm_reg_driver
);
819 module_exit(rpm_reg_exit
)
821 MODULE_DESCRIPTION("Qualcomm RPM regulator driver");
822 MODULE_LICENSE("GPL v2");