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1/*
2 * Copyright (C) ST-Ericsson SA 2010
3 *
4 * License Terms: GNU General Public License v2
5 *
6 * Authors: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
7 *
8 * This file is based on drivers/regulator/ab8500.c
9 *
10 * AB8500 external regulators
11 *
12 * ab8500-ext supports the following regulators:
13 * - VextSupply3
14 */
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/err.h>
18#include <linux/module.h>
19#include <linux/of.h>
20#include <linux/platform_device.h>
21#include <linux/regulator/driver.h>
22#include <linux/regulator/machine.h>
23#include <linux/regulator/of_regulator.h>
24#include <linux/mfd/abx500.h>
25#include <linux/mfd/abx500/ab8500.h>
26#include <linux/regulator/ab8500.h>
27
28static struct regulator_consumer_supply ab8500_vaux1_consumers[] = {
29 /* Main display, u8500 R3 uib */
30 REGULATOR_SUPPLY("vddi", "mcde_disp_sony_acx424akp.0"),
31 /* Main display, u8500 uib and ST uib */
32 REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.0"),
33 /* Secondary display, ST uib */
34 REGULATOR_SUPPLY("vdd1", "samsung_s6d16d0.1"),
35 /* SFH7741 proximity sensor */
36 REGULATOR_SUPPLY("vcc", "gpio-keys.0"),
37 /* BH1780GLS ambient light sensor */
38 REGULATOR_SUPPLY("vcc", "2-0029"),
39 /* lsm303dlh accelerometer */
40 REGULATOR_SUPPLY("vdd", "2-0018"),
41 /* lsm303dlhc accelerometer */
42 REGULATOR_SUPPLY("vdd", "2-0019"),
43 /* lsm303dlh magnetometer */
44 REGULATOR_SUPPLY("vdd", "2-001e"),
45 /* Rohm BU21013 Touchscreen devices */
46 REGULATOR_SUPPLY("avdd", "3-005c"),
47 REGULATOR_SUPPLY("avdd", "3-005d"),
48 /* Synaptics RMI4 Touchscreen device */
49 REGULATOR_SUPPLY("vdd", "3-004b"),
50 /* L3G4200D Gyroscope device */
51 REGULATOR_SUPPLY("vdd", "2-0068"),
52 /* Ambient light sensor device */
53 REGULATOR_SUPPLY("vdd", "3-0029"),
54 /* Pressure sensor device */
55 REGULATOR_SUPPLY("vdd", "2-005c"),
56 /* Cypress TrueTouch Touchscreen device */
57 REGULATOR_SUPPLY("vcpin", "spi8.0"),
58 /* Camera device */
59 REGULATOR_SUPPLY("vaux12v5", "mmio_camera"),
60};
61
62static struct regulator_consumer_supply ab8500_vaux2_consumers[] = {
63 /* On-board eMMC power */
64 REGULATOR_SUPPLY("vmmc", "sdi4"),
65 /* AB8500 audio codec */
66 REGULATOR_SUPPLY("vcc-N2158", "ab8500-codec.0"),
67 /* AB8500 accessory detect 1 */
68 REGULATOR_SUPPLY("vcc-N2158", "ab8500-acc-det.0"),
69 /* AB8500 Tv-out device */
70 REGULATOR_SUPPLY("vcc-N2158", "mcde_tv_ab8500.4"),
71 /* AV8100 HDMI device */
72 REGULATOR_SUPPLY("vcc-N2158", "av8100_hdmi.3"),
73};
74
75static struct regulator_consumer_supply ab8500_vaux3_consumers[] = {
76 REGULATOR_SUPPLY("v-SD-STM", "stm"),
77 /* External MMC slot power */
78 REGULATOR_SUPPLY("vmmc", "sdi0"),
79};
80
81static struct regulator_consumer_supply ab8500_vtvout_consumers[] = {
82 /* TV-out DENC supply */
83 REGULATOR_SUPPLY("vtvout", "ab8500-denc.0"),
84 /* Internal general-purpose ADC */
85 REGULATOR_SUPPLY("vddadc", "ab8500-gpadc.0"),
86 /* ADC for charger */
87 REGULATOR_SUPPLY("vddadc", "ab8500-charger.0"),
88 /* AB8500 Tv-out device */
89 REGULATOR_SUPPLY("vtvout", "mcde_tv_ab8500.4"),
90};
91
92static struct regulator_consumer_supply ab8500_vaud_consumers[] = {
93 /* AB8500 audio-codec main supply */
94 REGULATOR_SUPPLY("vaud", "ab8500-codec.0"),
95};
96
97static struct regulator_consumer_supply ab8500_vamic1_consumers[] = {
98 /* AB8500 audio-codec Mic1 supply */
99 REGULATOR_SUPPLY("vamic1", "ab8500-codec.0"),
100};
101
102static struct regulator_consumer_supply ab8500_vamic2_consumers[] = {
103 /* AB8500 audio-codec Mic2 supply */
104 REGULATOR_SUPPLY("vamic2", "ab8500-codec.0"),
105};
106
107static struct regulator_consumer_supply ab8500_vdmic_consumers[] = {
108 /* AB8500 audio-codec DMic supply */
109 REGULATOR_SUPPLY("vdmic", "ab8500-codec.0"),
110};
111
112static struct regulator_consumer_supply ab8500_vintcore_consumers[] = {
113 /* SoC core supply, no device */
114 REGULATOR_SUPPLY("v-intcore", NULL),
115 /* USB Transceiver */
116 REGULATOR_SUPPLY("vddulpivio18", "ab8500-usb.0"),
117 /* Handled by abx500 clk driver */
118 REGULATOR_SUPPLY("v-intcore", "abx500-clk.0"),
119};
120
121static struct regulator_consumer_supply ab8500_vana_consumers[] = {
122 /* DB8500 DSI */
123 REGULATOR_SUPPLY("vdddsi1v2", "mcde"),
124 REGULATOR_SUPPLY("vdddsi1v2", "b2r2_core"),
125 REGULATOR_SUPPLY("vdddsi1v2", "b2r2_1_core"),
126 REGULATOR_SUPPLY("vdddsi1v2", "dsilink.0"),
127 REGULATOR_SUPPLY("vdddsi1v2", "dsilink.1"),
128 REGULATOR_SUPPLY("vdddsi1v2", "dsilink.2"),
129 /* DB8500 CSI */
130 REGULATOR_SUPPLY("vddcsi1v2", "mmio_camera"),
131};
132
133/* ab8500 regulator register initialization */
134static struct ab8500_regulator_reg_init ab8500_reg_init[] = {
135 /*
136 * VanaRequestCtrl = HP/LP depending on VxRequest
137 * VextSupply1RequestCtrl = HP/LP depending on VxRequest
138 */
139 INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL2, 0xf0, 0x00),
140 /*
141 * VextSupply2RequestCtrl = HP/LP depending on VxRequest
142 * VextSupply3RequestCtrl = HP/LP depending on VxRequest
143 * Vaux1RequestCtrl = HP/LP depending on VxRequest
144 * Vaux2RequestCtrl = HP/LP depending on VxRequest
145 */
146 INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL3, 0xff, 0x00),
147 /*
148 * Vaux3RequestCtrl = HP/LP depending on VxRequest
149 * SwHPReq = Control through SWValid disabled
150 */
151 INIT_REGULATOR_REGISTER(AB8500_REGUREQUESTCTRL4, 0x07, 0x00),
152 /*
153 * VanaSysClkReq1HPValid = disabled
154 * Vaux1SysClkReq1HPValid = disabled
155 * Vaux2SysClkReq1HPValid = disabled
156 * Vaux3SysClkReq1HPValid = disabled
157 */
158 INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID1, 0xe8, 0x00),
159 /*
160 * VextSupply1SysClkReq1HPValid = disabled
161 * VextSupply2SysClkReq1HPValid = disabled
162 * VextSupply3SysClkReq1HPValid = SysClkReq1 controlled
163 */
164 INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQ1HPVALID2, 0x70, 0x40),
165 /*
166 * VanaHwHPReq1Valid = disabled
167 * Vaux1HwHPreq1Valid = disabled
168 * Vaux2HwHPReq1Valid = disabled
169 * Vaux3HwHPReqValid = disabled
170 */
171 INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID1, 0xe8, 0x00),
172 /*
173 * VextSupply1HwHPReq1Valid = disabled
174 * VextSupply2HwHPReq1Valid = disabled
175 * VextSupply3HwHPReq1Valid = disabled
176 */
177 INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ1VALID2, 0x07, 0x00),
178 /*
179 * VanaHwHPReq2Valid = disabled
180 * Vaux1HwHPReq2Valid = disabled
181 * Vaux2HwHPReq2Valid = disabled
182 * Vaux3HwHPReq2Valid = disabled
183 */
184 INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID1, 0xe8, 0x00),
185 /*
186 * VextSupply1HwHPReq2Valid = disabled
187 * VextSupply2HwHPReq2Valid = disabled
188 * VextSupply3HwHPReq2Valid = HWReq2 controlled
189 */
190 INIT_REGULATOR_REGISTER(AB8500_REGUHWHPREQ2VALID2, 0x07, 0x04),
191 /*
192 * VanaSwHPReqValid = disabled
193 * Vaux1SwHPReqValid = disabled
194 */
195 INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID1, 0xa0, 0x00),
196 /*
197 * Vaux2SwHPReqValid = disabled
198 * Vaux3SwHPReqValid = disabled
199 * VextSupply1SwHPReqValid = disabled
200 * VextSupply2SwHPReqValid = disabled
201 * VextSupply3SwHPReqValid = disabled
202 */
203 INIT_REGULATOR_REGISTER(AB8500_REGUSWHPREQVALID2, 0x1f, 0x00),
204 /*
205 * SysClkReq2Valid1 = SysClkReq2 controlled
206 * SysClkReq3Valid1 = disabled
207 * SysClkReq4Valid1 = SysClkReq4 controlled
208 * SysClkReq5Valid1 = disabled
209 * SysClkReq6Valid1 = SysClkReq6 controlled
210 * SysClkReq7Valid1 = disabled
211 * SysClkReq8Valid1 = disabled
212 */
213 INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID1, 0xfe, 0x2a),
214 /*
215 * SysClkReq2Valid2 = disabled
216 * SysClkReq3Valid2 = disabled
217 * SysClkReq4Valid2 = disabled
218 * SysClkReq5Valid2 = disabled
219 * SysClkReq6Valid2 = SysClkReq6 controlled
220 * SysClkReq7Valid2 = disabled
221 * SysClkReq8Valid2 = disabled
222 */
223 INIT_REGULATOR_REGISTER(AB8500_REGUSYSCLKREQVALID2, 0xfe, 0x20),
224 /*
225 * VTVoutEna = disabled
226 * Vintcore12Ena = disabled
227 * Vintcore12Sel = 1.25 V
228 * Vintcore12LP = inactive (HP)
229 * VTVoutLP = inactive (HP)
230 */
231 INIT_REGULATOR_REGISTER(AB8500_REGUMISC1, 0xfe, 0x10),
232 /*
233 * VaudioEna = disabled
234 * VdmicEna = disabled
235 * Vamic1Ena = disabled
236 * Vamic2Ena = disabled
237 */
238 INIT_REGULATOR_REGISTER(AB8500_VAUDIOSUPPLY, 0x1e, 0x00),
239 /*
240 * Vamic1_dzout = high-Z when Vamic1 is disabled
241 * Vamic2_dzout = high-Z when Vamic2 is disabled
242 */
243 INIT_REGULATOR_REGISTER(AB8500_REGUCTRL1VAMIC, 0x03, 0x00),
244 /*
245 * VPll = Hw controlled (NOTE! PRCMU bits)
246 * VanaRegu = force off
247 */
248 INIT_REGULATOR_REGISTER(AB8500_VPLLVANAREGU, 0x0f, 0x02),
249 /*
250 * VrefDDREna = disabled
251 * VrefDDRSleepMode = inactive (no pulldown)
252 */
253 INIT_REGULATOR_REGISTER(AB8500_VREFDDR, 0x03, 0x00),
254 /*
255 * VextSupply1Regu = force LP
256 * VextSupply2Regu = force OFF
257 * VextSupply3Regu = force HP (-> STBB2=LP and TPS=LP)
258 * ExtSupply2Bypass = ExtSupply12LPn ball is 0 when Ena is 0
259 * ExtSupply3Bypass = ExtSupply3LPn ball is 0 when Ena is 0
260 */
261 INIT_REGULATOR_REGISTER(AB8500_EXTSUPPLYREGU, 0xff, 0x13),
262 /*
263 * Vaux1Regu = force HP
264 * Vaux2Regu = force off
265 */
266 INIT_REGULATOR_REGISTER(AB8500_VAUX12REGU, 0x0f, 0x01),
267 /*
268 * Vaux3Regu = force off
269 */
270 INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3REGU, 0x03, 0x00),
271 /*
272 * Vaux1Sel = 2.8 V
273 */
274 INIT_REGULATOR_REGISTER(AB8500_VAUX1SEL, 0x0f, 0x0C),
275 /*
276 * Vaux2Sel = 2.9 V
277 */
278 INIT_REGULATOR_REGISTER(AB8500_VAUX2SEL, 0x0f, 0x0d),
279 /*
280 * Vaux3Sel = 2.91 V
281 */
282 INIT_REGULATOR_REGISTER(AB8500_VRF1VAUX3SEL, 0x07, 0x07),
283 /*
284 * VextSupply12LP = disabled (no LP)
285 */
286 INIT_REGULATOR_REGISTER(AB8500_REGUCTRL2SPARE, 0x01, 0x00),
287 /*
288 * Vaux1Disch = short discharge time
289 * Vaux2Disch = short discharge time
290 * Vaux3Disch = short discharge time
291 * Vintcore12Disch = short discharge time
292 * VTVoutDisch = short discharge time
293 * VaudioDisch = short discharge time
294 */
295 INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH, 0xfc, 0x00),
296 /*
297 * VanaDisch = short discharge time
298 * VdmicPullDownEna = pulldown disabled when Vdmic is disabled
299 * VdmicDisch = short discharge time
300 */
301 INIT_REGULATOR_REGISTER(AB8500_REGUCTRLDISCH2, 0x16, 0x00),
302};
303
304/* AB8500 regulators */
305static struct regulator_init_data ab8500_regulators[AB8500_NUM_REGULATORS] = {
306 /* supplies to the display/camera */
307 [AB8500_LDO_AUX1] = {
308 .supply_regulator = "ab8500-ext-supply3",
309 .constraints = {
310 .name = "V-DISPLAY",
311 .min_uV = 2800000,
312 .max_uV = 3300000,
313 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
314 REGULATOR_CHANGE_STATUS,
315 .boot_on = 1, /* display is on at boot */
316 },
317 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux1_consumers),
318 .consumer_supplies = ab8500_vaux1_consumers,
319 },
320 /* supplies to the on-board eMMC */
321 [AB8500_LDO_AUX2] = {
322 .supply_regulator = "ab8500-ext-supply3",
323 .constraints = {
324 .name = "V-eMMC1",
325 .min_uV = 1100000,
326 .max_uV = 3300000,
327 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
328 REGULATOR_CHANGE_STATUS |
329 REGULATOR_CHANGE_MODE,
330 .valid_modes_mask = REGULATOR_MODE_NORMAL |
331 REGULATOR_MODE_IDLE,
332 },
333 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux2_consumers),
334 .consumer_supplies = ab8500_vaux2_consumers,
335 },
336 /* supply for VAUX3, supplies to SDcard slots */
337 [AB8500_LDO_AUX3] = {
338 .supply_regulator = "ab8500-ext-supply3",
339 .constraints = {
340 .name = "V-MMC-SD",
341 .min_uV = 1100000,
342 .max_uV = 3300000,
343 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
344 REGULATOR_CHANGE_STATUS |
345 REGULATOR_CHANGE_MODE,
346 .valid_modes_mask = REGULATOR_MODE_NORMAL |
347 REGULATOR_MODE_IDLE,
348 },
349 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaux3_consumers),
350 .consumer_supplies = ab8500_vaux3_consumers,
351 },
352 /* supply for tvout, gpadc, TVOUT LDO */
353 [AB8500_LDO_TVOUT] = {
354 .constraints = {
355 .name = "V-TVOUT",
356 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
357 },
358 .num_consumer_supplies = ARRAY_SIZE(ab8500_vtvout_consumers),
359 .consumer_supplies = ab8500_vtvout_consumers,
360 },
361 /* supply for ab8500-vaudio, VAUDIO LDO */
362 [AB8500_LDO_AUDIO] = {
363 .constraints = {
364 .name = "V-AUD",
365 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
366 },
367 .num_consumer_supplies = ARRAY_SIZE(ab8500_vaud_consumers),
368 .consumer_supplies = ab8500_vaud_consumers,
369 },
370 /* supply for v-anamic1 VAMic1-LDO */
371 [AB8500_LDO_ANAMIC1] = {
372 .constraints = {
373 .name = "V-AMIC1",
374 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
375 },
376 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic1_consumers),
377 .consumer_supplies = ab8500_vamic1_consumers,
378 },
379 /* supply for v-amic2, VAMIC2 LDO, reuse constants for AMIC1 */
380 [AB8500_LDO_ANAMIC2] = {
381 .constraints = {
382 .name = "V-AMIC2",
383 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
384 },
385 .num_consumer_supplies = ARRAY_SIZE(ab8500_vamic2_consumers),
386 .consumer_supplies = ab8500_vamic2_consumers,
387 },
388 /* supply for v-dmic, VDMIC LDO */
389 [AB8500_LDO_DMIC] = {
390 .constraints = {
391 .name = "V-DMIC",
392 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
393 },
394 .num_consumer_supplies = ARRAY_SIZE(ab8500_vdmic_consumers),
395 .consumer_supplies = ab8500_vdmic_consumers,
396 },
397 /* supply for v-intcore12, VINTCORE12 LDO */
398 [AB8500_LDO_INTCORE] = {
399 .constraints = {
400 .name = "V-INTCORE",
401 .min_uV = 1250000,
402 .max_uV = 1350000,
403 .input_uV = 1800000,
404 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
405 REGULATOR_CHANGE_STATUS |
406 REGULATOR_CHANGE_MODE |
407 REGULATOR_CHANGE_DRMS,
408 .valid_modes_mask = REGULATOR_MODE_NORMAL |
409 REGULATOR_MODE_IDLE,
410 },
411 .num_consumer_supplies = ARRAY_SIZE(ab8500_vintcore_consumers),
412 .consumer_supplies = ab8500_vintcore_consumers,
413 },
414 /* supply for U8500 CSI-DSI, VANA LDO */
415 [AB8500_LDO_ANA] = {
416 .constraints = {
417 .name = "V-CSI-DSI",
418 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
419 },
420 .num_consumer_supplies = ARRAY_SIZE(ab8500_vana_consumers),
421 .consumer_supplies = ab8500_vana_consumers,
422 },
423};
424
425/* supply for VextSupply3 */
426static struct regulator_consumer_supply ab8500_ext_supply3_consumers[] = {
427 /* SIM supply for 3 V SIM cards */
428 REGULATOR_SUPPLY("vinvsim", "sim-detect.0"),
429};
430
431/*
432 * AB8500 external regulators
433 */
434static struct regulator_init_data ab8500_ext_regulators[] = {
435 /* fixed Vbat supplies VSMPS1_EXT_1V8 */
436 [AB8500_EXT_SUPPLY1] = {
437 .constraints = {
438 .name = "ab8500-ext-supply1",
439 .min_uV = 1800000,
440 .max_uV = 1800000,
441 .initial_mode = REGULATOR_MODE_IDLE,
442 .boot_on = 1,
443 .always_on = 1,
444 },
445 },
446 /* fixed Vbat supplies VSMPS2_EXT_1V36 and VSMPS5_EXT_1V15 */
447 [AB8500_EXT_SUPPLY2] = {
448 .constraints = {
449 .name = "ab8500-ext-supply2",
450 .min_uV = 1360000,
451 .max_uV = 1360000,
452 },
453 },
454 /* fixed Vbat supplies VSMPS3_EXT_3V4 and VSMPS4_EXT_3V4 */
455 [AB8500_EXT_SUPPLY3] = {
456 .constraints = {
457 .name = "ab8500-ext-supply3",
458 .min_uV = 3400000,
459 .max_uV = 3400000,
460 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
461 .boot_on = 1,
462 },
463 .num_consumer_supplies =
464 ARRAY_SIZE(ab8500_ext_supply3_consumers),
465 .consumer_supplies = ab8500_ext_supply3_consumers,
466 },
467};
468
469static struct ab8500_regulator_platform_data ab8500_regulator_plat_data = {
470 .reg_init = ab8500_reg_init,
471 .num_reg_init = ARRAY_SIZE(ab8500_reg_init),
472 .regulator = ab8500_regulators,
473 .num_regulator = ARRAY_SIZE(ab8500_regulators),
474 .ext_regulator = ab8500_ext_regulators,
475 .num_ext_regulator = ARRAY_SIZE(ab8500_ext_regulators),
476};
477
478/**
479 * struct ab8500_ext_regulator_info - ab8500 regulator information
480 * @dev: device pointer
481 * @desc: regulator description
482 * @rdev: regulator device
483 * @cfg: regulator configuration (extension of regulator FW configuration)
484 * @update_bank: bank to control on/off
485 * @update_reg: register to control on/off
486 * @update_mask: mask to enable/disable and set mode of regulator
487 * @update_val: bits holding the regulator current mode
488 * @update_val_hp: bits to set EN pin active (LPn pin deactive)
489 * normally this means high power mode
490 * @update_val_lp: bits to set EN pin active and LPn pin active
491 * normally this means low power mode
492 * @update_val_hw: bits to set regulator pins in HW control
493 * SysClkReq pins and logic will choose mode
494 */
495struct ab8500_ext_regulator_info {
496 struct device *dev;
497 struct regulator_desc desc;
498 struct regulator_dev *rdev;
499 struct ab8500_ext_regulator_cfg *cfg;
500 u8 update_bank;
501 u8 update_reg;
502 u8 update_mask;
503 u8 update_val;
504 u8 update_val_hp;
505 u8 update_val_lp;
506 u8 update_val_hw;
507};
508
509static int ab8500_ext_regulator_enable(struct regulator_dev *rdev)
510{
511 int ret;
512 struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
513 u8 regval;
514
515 if (info == NULL) {
516 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
517 return -EINVAL;
518 }
519
520 /*
521 * To satisfy both HW high power request and SW request, the regulator
522 * must be on in high power.
523 */
524 if (info->cfg && info->cfg->hwreq)
525 regval = info->update_val_hp;
526 else
527 regval = info->update_val;
528
529 ret = abx500_mask_and_set_register_interruptible(info->dev,
530 info->update_bank, info->update_reg,
531 info->update_mask, regval);
532 if (ret < 0) {
533 dev_err(rdev_get_dev(info->rdev),
534 "couldn't set enable bits for regulator\n");
535 return ret;
536 }
537
538 dev_dbg(rdev_get_dev(rdev),
539 "%s-enable (bank, reg, mask, value): 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
540 info->desc.name, info->update_bank, info->update_reg,
541 info->update_mask, regval);
542
543 return 0;
544}
545
546static int ab8500_ext_regulator_disable(struct regulator_dev *rdev)
547{
548 int ret;
549 struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
550 u8 regval;
551
552 if (info == NULL) {
553 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
554 return -EINVAL;
555 }
556
557 /*
558 * Set the regulator in HW request mode if configured
559 */
560 if (info->cfg && info->cfg->hwreq)
561 regval = info->update_val_hw;
562 else
563 regval = 0;
564
565 ret = abx500_mask_and_set_register_interruptible(info->dev,
566 info->update_bank, info->update_reg,
567 info->update_mask, regval);
568 if (ret < 0) {
569 dev_err(rdev_get_dev(info->rdev),
570 "couldn't set disable bits for regulator\n");
571 return ret;
572 }
573
574 dev_dbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value):"
575 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
576 info->desc.name, info->update_bank, info->update_reg,
577 info->update_mask, regval);
578
579 return 0;
580}
581
582static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev)
583{
584 int ret;
585 struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
586 u8 regval;
587
588 if (info == NULL) {
589 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
590 return -EINVAL;
591 }
592
593 ret = abx500_get_register_interruptible(info->dev,
594 info->update_bank, info->update_reg, &regval);
595 if (ret < 0) {
596 dev_err(rdev_get_dev(rdev),
597 "couldn't read 0x%x register\n", info->update_reg);
598 return ret;
599 }
600
601 dev_dbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value):"
602 " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
603 info->desc.name, info->update_bank, info->update_reg,
604 info->update_mask, regval);
605
606 if (((regval & info->update_mask) == info->update_val_lp) ||
607 ((regval & info->update_mask) == info->update_val_hp))
608 return 1;
609 else
610 return 0;
611}
612
613static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
614 unsigned int mode)
615{
616 int ret = 0;
617 struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
618 u8 regval;
619
620 if (info == NULL) {
621 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
622 return -EINVAL;
623 }
624
625 switch (mode) {
626 case REGULATOR_MODE_NORMAL:
627 regval = info->update_val_hp;
628 break;
629 case REGULATOR_MODE_IDLE:
630 regval = info->update_val_lp;
631 break;
632
633 default:
634 return -EINVAL;
635 }
636
637 /* If regulator is enabled and info->cfg->hwreq is set, the regulator
638 must be on in high power, so we don't need to write the register with
639 the same value.
640 */
641 if (ab8500_ext_regulator_is_enabled(rdev) &&
642 !(info->cfg && info->cfg->hwreq)) {
643 ret = abx500_mask_and_set_register_interruptible(info->dev,
644 info->update_bank, info->update_reg,
645 info->update_mask, regval);
646 if (ret < 0) {
647 dev_err(rdev_get_dev(rdev),
648 "Could not set regulator mode.\n");
649 return ret;
650 }
651
652 dev_dbg(rdev_get_dev(rdev),
653 "%s-set_mode (bank, reg, mask, value): "
654 "0x%x, 0x%x, 0x%x, 0x%x\n",
655 info->desc.name, info->update_bank, info->update_reg,
656 info->update_mask, regval);
657 }
658
659 info->update_val = regval;
660
661 return 0;
662}
663
664static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)
665{
666 struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
667 int ret;
668
669 if (info == NULL) {
670 dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
671 return -EINVAL;
672 }
673
674 if (info->update_val == info->update_val_hp)
675 ret = REGULATOR_MODE_NORMAL;
676 else if (info->update_val == info->update_val_lp)
677 ret = REGULATOR_MODE_IDLE;
678 else
679 ret = -EINVAL;
680
681 return ret;
682}
683
684static int ab8500_ext_set_voltage(struct regulator_dev *rdev, int min_uV,
685 int max_uV, unsigned *selector)
686{
687 struct regulation_constraints *regu_constraints = rdev->constraints;
688
689 if (!regu_constraints) {
690 dev_err(rdev_get_dev(rdev), "No regulator constraints\n");
691 return -EINVAL;
692 }
693
694 if (regu_constraints->min_uV == min_uV &&
695 regu_constraints->max_uV == max_uV)
696 return 0;
697
698 dev_err(rdev_get_dev(rdev),
699 "Requested min %duV max %duV != constrained min %duV max %duV\n",
700 min_uV, max_uV,
701 regu_constraints->min_uV, regu_constraints->max_uV);
702
703 return -EINVAL;
704}
705
706static int ab8500_ext_list_voltage(struct regulator_dev *rdev,
707 unsigned selector)
708{
709 struct regulation_constraints *regu_constraints = rdev->constraints;
710
711 if (regu_constraints == NULL) {
712 dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n");
713 return -EINVAL;
714 }
715 /* return the uV for the fixed regulators */
716 if (regu_constraints->min_uV && regu_constraints->max_uV) {
717 if (regu_constraints->min_uV == regu_constraints->max_uV)
718 return regu_constraints->min_uV;
719 }
720 return -EINVAL;
721}
722
723static struct regulator_ops ab8500_ext_regulator_ops = {
724 .enable = ab8500_ext_regulator_enable,
725 .disable = ab8500_ext_regulator_disable,
726 .is_enabled = ab8500_ext_regulator_is_enabled,
727 .set_mode = ab8500_ext_regulator_set_mode,
728 .get_mode = ab8500_ext_regulator_get_mode,
729 .set_voltage = ab8500_ext_set_voltage,
730 .list_voltage = ab8500_ext_list_voltage,
731};
732
733static struct ab8500_ext_regulator_info
734 ab8500_ext_regulator_info[AB8500_NUM_EXT_REGULATORS] = {
735 [AB8500_EXT_SUPPLY1] = {
736 .desc = {
737 .name = "VEXTSUPPLY1",
738 .ops = &ab8500_ext_regulator_ops,
739 .type = REGULATOR_VOLTAGE,
740 .id = AB8500_EXT_SUPPLY1,
741 .owner = THIS_MODULE,
742 .n_voltages = 1,
743 },
744 .update_bank = 0x04,
745 .update_reg = 0x08,
746 .update_mask = 0x03,
747 .update_val = 0x01,
748 .update_val_hp = 0x01,
749 .update_val_lp = 0x03,
750 .update_val_hw = 0x02,
751 },
752 [AB8500_EXT_SUPPLY2] = {
753 .desc = {
754 .name = "VEXTSUPPLY2",
755 .ops = &ab8500_ext_regulator_ops,
756 .type = REGULATOR_VOLTAGE,
757 .id = AB8500_EXT_SUPPLY2,
758 .owner = THIS_MODULE,
759 .n_voltages = 1,
760 },
761 .update_bank = 0x04,
762 .update_reg = 0x08,
763 .update_mask = 0x0c,
764 .update_val = 0x04,
765 .update_val_hp = 0x04,
766 .update_val_lp = 0x0c,
767 .update_val_hw = 0x08,
768 },
769 [AB8500_EXT_SUPPLY3] = {
770 .desc = {
771 .name = "VEXTSUPPLY3",
772 .ops = &ab8500_ext_regulator_ops,
773 .type = REGULATOR_VOLTAGE,
774 .id = AB8500_EXT_SUPPLY3,
775 .owner = THIS_MODULE,
776 .n_voltages = 1,
777 },
778 .update_bank = 0x04,
779 .update_reg = 0x08,
780 .update_mask = 0x30,
781 .update_val = 0x10,
782 .update_val_hp = 0x10,
783 .update_val_lp = 0x30,
784 .update_val_hw = 0x20,
785 },
786};
787
788static struct of_regulator_match ab8500_ext_regulator_match[] = {
789 { .name = "ab8500_ext1", .driver_data = (void *) AB8500_EXT_SUPPLY1, },
790 { .name = "ab8500_ext2", .driver_data = (void *) AB8500_EXT_SUPPLY2, },
791 { .name = "ab8500_ext3", .driver_data = (void *) AB8500_EXT_SUPPLY3, },
792};
793
794static int ab8500_ext_regulator_probe(struct platform_device *pdev)
795{
796 struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
797 struct ab8500_regulator_platform_data *pdata = &ab8500_regulator_plat_data;
798 struct device_node *np = pdev->dev.of_node;
799 struct regulator_config config = { };
800 int i, err;
801
802 if (np) {
803 err = of_regulator_match(&pdev->dev, np,
804 ab8500_ext_regulator_match,
805 ARRAY_SIZE(ab8500_ext_regulator_match));
806 if (err < 0) {
807 dev_err(&pdev->dev,
808 "Error parsing regulator init data: %d\n", err);
809 return err;
810 }
811 }
812
813 if (!ab8500) {
814 dev_err(&pdev->dev, "null mfd parent\n");
815 return -EINVAL;
816 }
817
818 /* make sure the platform data has the correct size */
819 if (pdata->num_ext_regulator != ARRAY_SIZE(ab8500_ext_regulator_info)) {
820 dev_err(&pdev->dev, "Configuration error: size mismatch.\n");
821 return -EINVAL;
822 }
823
824 /* check for AB8500 2.x */
825 if (is_ab8500_2p0_or_earlier(ab8500)) {
826 struct ab8500_ext_regulator_info *info;
827
828 /* VextSupply3LPn is inverted on AB8500 2.x */
829 info = &ab8500_ext_regulator_info[AB8500_EXT_SUPPLY3];
830 info->update_val = 0x30;
831 info->update_val_hp = 0x30;
832 info->update_val_lp = 0x10;
833 }
834
835 /* register all regulators */
836 for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) {
837 struct ab8500_ext_regulator_info *info = NULL;
838
839 /* assign per-regulator data */
840 info = &ab8500_ext_regulator_info[i];
841 info->dev = &pdev->dev;
842 info->cfg = (struct ab8500_ext_regulator_cfg *)
843 pdata->ext_regulator[i].driver_data;
844
845 config.dev = &pdev->dev;
846 config.driver_data = info;
847 config.of_node = ab8500_ext_regulator_match[i].of_node;
848 config.init_data = (np) ?
849 ab8500_ext_regulator_match[i].init_data :
850 &pdata->ext_regulator[i];
851
852 /* register regulator with framework */
853 info->rdev = devm_regulator_register(&pdev->dev, &info->desc,
854 &config);
855 if (IS_ERR(info->rdev)) {
856 err = PTR_ERR(info->rdev);
857 dev_err(&pdev->dev, "failed to register regulator %s\n",
858 info->desc.name);
859 return err;
860 }
861
862 dev_dbg(rdev_get_dev(info->rdev),
863 "%s-probed\n", info->desc.name);
864 }
865
866 return 0;
867}
868
869static struct platform_driver ab8500_ext_regulator_driver = {
870 .probe = ab8500_ext_regulator_probe,
871 .driver = {
872 .name = "ab8500-ext-regulator",
873 },
874};
875
876static int __init ab8500_ext_regulator_init(void)
877{
878 int ret;
879
880 ret = platform_driver_register(&ab8500_ext_regulator_driver);
881 if (ret)
882 pr_err("Failed to register ab8500 ext regulator: %d\n", ret);
883
884 return ret;
885}
886subsys_initcall(ab8500_ext_regulator_init);
887
888static void __exit ab8500_ext_regulator_exit(void)
889{
890 platform_driver_unregister(&ab8500_ext_regulator_driver);
891}
892module_exit(ab8500_ext_regulator_exit);
893
894MODULE_LICENSE("GPL v2");
895MODULE_AUTHOR("Bengt Jonsson <bengt.g.jonsson@stericsson.com>");
896MODULE_DESCRIPTION("AB8500 external regulator driver");
897MODULE_ALIAS("platform:ab8500-ext-regulator");
898

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