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e5ce4208 GG |
1 | /* |
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> | |
25 | ||
26 | struct regs_info { | |
27 | char *name; | |
28 | u8 vsel_addr; | |
29 | u8 ctrl_addr; | |
30 | u8 tstep_addr; | |
31 | }; | |
32 | ||
33 | static const struct regs_info palmas_regs_info[] = { | |
34 | { | |
35 | .name = "SMPS12", | |
36 | .vsel_addr = PALMAS_SMPS12_VOLTAGE, | |
37 | .ctrl_addr = PALMAS_SMPS12_CTRL, | |
38 | .tstep_addr = PALMAS_SMPS12_TSTEP, | |
39 | }, | |
40 | { | |
41 | .name = "SMPS123", | |
42 | .vsel_addr = PALMAS_SMPS12_VOLTAGE, | |
43 | .ctrl_addr = PALMAS_SMPS12_CTRL, | |
44 | .tstep_addr = PALMAS_SMPS12_TSTEP, | |
45 | }, | |
46 | { | |
47 | .name = "SMPS3", | |
48 | .vsel_addr = PALMAS_SMPS3_VOLTAGE, | |
49 | .ctrl_addr = PALMAS_SMPS3_CTRL, | |
50 | }, | |
51 | { | |
52 | .name = "SMPS45", | |
53 | .vsel_addr = PALMAS_SMPS45_VOLTAGE, | |
54 | .ctrl_addr = PALMAS_SMPS45_CTRL, | |
55 | .tstep_addr = PALMAS_SMPS45_TSTEP, | |
56 | }, | |
57 | { | |
58 | .name = "SMPS457", | |
59 | .vsel_addr = PALMAS_SMPS45_VOLTAGE, | |
60 | .ctrl_addr = PALMAS_SMPS45_CTRL, | |
61 | .tstep_addr = PALMAS_SMPS45_TSTEP, | |
62 | }, | |
63 | { | |
64 | .name = "SMPS6", | |
65 | .vsel_addr = PALMAS_SMPS6_VOLTAGE, | |
66 | .ctrl_addr = PALMAS_SMPS6_CTRL, | |
67 | .tstep_addr = PALMAS_SMPS6_TSTEP, | |
68 | }, | |
69 | { | |
70 | .name = "SMPS7", | |
71 | .vsel_addr = PALMAS_SMPS7_VOLTAGE, | |
72 | .ctrl_addr = PALMAS_SMPS7_CTRL, | |
73 | }, | |
74 | { | |
75 | .name = "SMPS8", | |
76 | .vsel_addr = PALMAS_SMPS8_VOLTAGE, | |
77 | .ctrl_addr = PALMAS_SMPS8_CTRL, | |
78 | .tstep_addr = PALMAS_SMPS8_TSTEP, | |
79 | }, | |
80 | { | |
81 | .name = "SMPS9", | |
82 | .vsel_addr = PALMAS_SMPS9_VOLTAGE, | |
83 | .ctrl_addr = PALMAS_SMPS9_CTRL, | |
84 | }, | |
85 | { | |
86 | .name = "SMPS10", | |
87 | }, | |
88 | { | |
89 | .name = "LDO1", | |
90 | .vsel_addr = PALMAS_LDO1_VOLTAGE, | |
91 | .ctrl_addr = PALMAS_LDO1_CTRL, | |
92 | }, | |
93 | { | |
94 | .name = "LDO2", | |
95 | .vsel_addr = PALMAS_LDO2_VOLTAGE, | |
96 | .ctrl_addr = PALMAS_LDO2_CTRL, | |
97 | }, | |
98 | { | |
99 | .name = "LDO3", | |
100 | .vsel_addr = PALMAS_LDO3_VOLTAGE, | |
101 | .ctrl_addr = PALMAS_LDO3_CTRL, | |
102 | }, | |
103 | { | |
104 | .name = "LDO4", | |
105 | .vsel_addr = PALMAS_LDO4_VOLTAGE, | |
106 | .ctrl_addr = PALMAS_LDO4_CTRL, | |
107 | }, | |
108 | { | |
109 | .name = "LDO5", | |
110 | .vsel_addr = PALMAS_LDO5_VOLTAGE, | |
111 | .ctrl_addr = PALMAS_LDO5_CTRL, | |
112 | }, | |
113 | { | |
114 | .name = "LDO6", | |
115 | .vsel_addr = PALMAS_LDO6_VOLTAGE, | |
116 | .ctrl_addr = PALMAS_LDO6_CTRL, | |
117 | }, | |
118 | { | |
119 | .name = "LDO7", | |
120 | .vsel_addr = PALMAS_LDO7_VOLTAGE, | |
121 | .ctrl_addr = PALMAS_LDO7_CTRL, | |
122 | }, | |
123 | { | |
124 | .name = "LDO8", | |
125 | .vsel_addr = PALMAS_LDO8_VOLTAGE, | |
126 | .ctrl_addr = PALMAS_LDO8_CTRL, | |
127 | }, | |
128 | { | |
129 | .name = "LDO9", | |
130 | .vsel_addr = PALMAS_LDO9_VOLTAGE, | |
131 | .ctrl_addr = PALMAS_LDO9_CTRL, | |
132 | }, | |
133 | { | |
134 | .name = "LDOLN", | |
135 | .vsel_addr = PALMAS_LDOLN_VOLTAGE, | |
136 | .ctrl_addr = PALMAS_LDOLN_CTRL, | |
137 | }, | |
138 | { | |
139 | .name = "LDOUSB", | |
140 | .vsel_addr = PALMAS_LDOUSB_VOLTAGE, | |
141 | .ctrl_addr = PALMAS_LDOUSB_CTRL, | |
142 | }, | |
143 | }; | |
144 | ||
145 | #define SMPS_CTRL_MODE_OFF 0x00 | |
146 | #define SMPS_CTRL_MODE_ON 0x01 | |
147 | #define SMPS_CTRL_MODE_ECO 0x02 | |
148 | #define SMPS_CTRL_MODE_PWM 0x03 | |
149 | ||
150 | /* These values are derived from the data sheet. And are the number of steps | |
151 | * where there is a voltage change, the ranges at beginning and end of register | |
152 | * max/min values where there are no change are ommitted. | |
153 | * | |
154 | * So they are basically (maxV-minV)/stepV | |
155 | */ | |
156 | #define PALMAS_SMPS_NUM_VOLTAGES 116 | |
157 | #define PALMAS_SMPS10_NUM_VOLTAGES 2 | |
158 | #define PALMAS_LDO_NUM_VOLTAGES 50 | |
159 | ||
160 | #define SMPS10_VSEL (1<<3) | |
161 | #define SMPS10_BOOST_EN (1<<2) | |
162 | #define SMPS10_BYPASS_EN (1<<1) | |
163 | #define SMPS10_SWITCH_EN (1<<0) | |
164 | ||
165 | #define REGULATOR_SLAVE 0 | |
166 | ||
167 | static int palmas_smps_read(struct palmas *palmas, unsigned int reg, | |
168 | unsigned int *dest) | |
169 | { | |
170 | unsigned int addr; | |
171 | ||
172 | addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); | |
173 | ||
174 | return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); | |
175 | } | |
176 | ||
177 | static int palmas_smps_write(struct palmas *palmas, unsigned int reg, | |
178 | unsigned int value) | |
179 | { | |
180 | unsigned int addr; | |
181 | ||
182 | addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); | |
183 | ||
184 | return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); | |
185 | } | |
186 | ||
187 | static int palmas_ldo_read(struct palmas *palmas, unsigned int reg, | |
188 | unsigned int *dest) | |
189 | { | |
190 | unsigned int addr; | |
191 | ||
192 | addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); | |
193 | ||
194 | return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); | |
195 | } | |
196 | ||
197 | static int palmas_ldo_write(struct palmas *palmas, unsigned int reg, | |
198 | unsigned int value) | |
199 | { | |
200 | unsigned int addr; | |
201 | ||
202 | addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); | |
203 | ||
204 | return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); | |
205 | } | |
206 | ||
207 | static int palmas_is_enabled_smps(struct regulator_dev *dev) | |
208 | { | |
209 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
210 | int id = rdev_get_id(dev); | |
211 | unsigned int reg; | |
212 | ||
213 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
214 | ||
215 | reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; | |
216 | reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; | |
217 | ||
218 | return !!(reg); | |
219 | } | |
220 | ||
221 | static int palmas_enable_smps(struct regulator_dev *dev) | |
222 | { | |
223 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
224 | int id = rdev_get_id(dev); | |
225 | unsigned int reg; | |
226 | ||
227 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
228 | ||
229 | reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; | |
230 | reg |= SMPS_CTRL_MODE_ON; | |
231 | ||
232 | palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int palmas_disable_smps(struct regulator_dev *dev) | |
238 | { | |
239 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
240 | int id = rdev_get_id(dev); | |
241 | unsigned int reg; | |
242 | ||
243 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
244 | ||
245 | reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; | |
246 | ||
247 | palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | ||
253 | static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode) | |
254 | { | |
255 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
256 | int id = rdev_get_id(dev); | |
257 | unsigned int reg; | |
258 | ||
259 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
999f0c7c | 260 | reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; |
e5ce4208 GG |
261 | |
262 | switch (mode) { | |
263 | case REGULATOR_MODE_NORMAL: | |
264 | reg |= SMPS_CTRL_MODE_ON; | |
265 | break; | |
266 | case REGULATOR_MODE_IDLE: | |
267 | reg |= SMPS_CTRL_MODE_ECO; | |
268 | break; | |
269 | case REGULATOR_MODE_FAST: | |
270 | reg |= SMPS_CTRL_MODE_PWM; | |
271 | break; | |
272 | default: | |
273 | return -EINVAL; | |
274 | } | |
275 | palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static unsigned int palmas_get_mode_smps(struct regulator_dev *dev) | |
281 | { | |
282 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
283 | int id = rdev_get_id(dev); | |
284 | unsigned int reg; | |
285 | ||
286 | palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
287 | reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; | |
288 | reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; | |
289 | ||
290 | switch (reg) { | |
291 | case SMPS_CTRL_MODE_ON: | |
292 | return REGULATOR_MODE_NORMAL; | |
293 | case SMPS_CTRL_MODE_ECO: | |
294 | return REGULATOR_MODE_IDLE; | |
295 | case SMPS_CTRL_MODE_PWM: | |
296 | return REGULATOR_MODE_FAST; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static int palmas_list_voltage_smps(struct regulator_dev *dev, | |
303 | unsigned selector) | |
304 | { | |
305 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
306 | int id = rdev_get_id(dev); | |
307 | int mult = 1; | |
308 | ||
309 | if (!selector) | |
310 | return 0; | |
311 | ||
312 | /* Read the multiplier set in VSEL register to return | |
313 | * the correct voltage. | |
314 | */ | |
315 | if (pmic->range[id]) | |
316 | mult = 2; | |
317 | ||
318 | /* Voltage is (0.49V + (selector * 0.01V)) * RANGE | |
319 | * as defined in data sheet. RANGE is either x1 or x2 | |
320 | */ | |
321 | return (490000 + (selector * 10000)) * mult; | |
322 | } | |
323 | ||
324 | static int palmas_get_voltage_smps_sel(struct regulator_dev *dev) | |
325 | { | |
326 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
327 | int id = rdev_get_id(dev); | |
328 | int selector; | |
329 | unsigned int reg; | |
330 | unsigned int addr; | |
331 | ||
332 | addr = palmas_regs_info[id].vsel_addr; | |
333 | ||
334 | palmas_smps_read(pmic->palmas, addr, ®); | |
335 | ||
336 | selector = reg & PALMAS_SMPS12_VOLTAGE_VSEL_MASK; | |
337 | ||
338 | /* Adjust selector to match list_voltage ranges */ | |
339 | if ((selector > 0) && (selector < 6)) | |
340 | selector = 6; | |
341 | if (!selector) | |
342 | selector = 5; | |
343 | if (selector > 121) | |
344 | selector = 121; | |
345 | selector -= 5; | |
346 | ||
347 | return selector; | |
348 | } | |
349 | ||
350 | static int palmas_set_voltage_smps_sel(struct regulator_dev *dev, | |
351 | unsigned selector) | |
352 | { | |
353 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
354 | int id = rdev_get_id(dev); | |
355 | unsigned int reg = 0; | |
356 | unsigned int addr; | |
357 | ||
358 | addr = palmas_regs_info[id].vsel_addr; | |
359 | ||
360 | /* Make sure we don't change the value of RANGE */ | |
361 | if (pmic->range[id]) | |
362 | reg |= PALMAS_SMPS12_VOLTAGE_RANGE; | |
363 | ||
364 | /* Adjust the linux selector into range used in VSEL register */ | |
365 | if (selector) | |
366 | reg |= selector + 5; | |
367 | ||
368 | palmas_smps_write(pmic->palmas, addr, reg); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static int palmas_map_voltage_smps(struct regulator_dev *rdev, | |
374 | int min_uV, int max_uV) | |
375 | { | |
376 | int ret, voltage; | |
377 | ||
378 | ret = ((min_uV - 500000) / 10000) + 1; | |
379 | if (ret < 0) | |
380 | return ret; | |
381 | ||
382 | /* Map back into a voltage to verify we're still in bounds */ | |
383 | voltage = palmas_list_voltage_smps(rdev, ret); | |
384 | if (voltage < min_uV || voltage > max_uV) | |
385 | return -EINVAL; | |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
390 | static struct regulator_ops palmas_ops_smps = { | |
391 | .is_enabled = palmas_is_enabled_smps, | |
392 | .enable = palmas_enable_smps, | |
393 | .disable = palmas_disable_smps, | |
394 | .set_mode = palmas_set_mode_smps, | |
395 | .get_mode = palmas_get_mode_smps, | |
396 | .get_voltage_sel = palmas_get_voltage_smps_sel, | |
397 | .set_voltage_sel = palmas_set_voltage_smps_sel, | |
398 | .list_voltage = palmas_list_voltage_smps, | |
399 | .map_voltage = palmas_map_voltage_smps, | |
400 | }; | |
401 | ||
e5ce4208 GG |
402 | static struct regulator_ops palmas_ops_smps10 = { |
403 | .is_enabled = regulator_is_enabled_regmap, | |
404 | .enable = regulator_enable_regmap, | |
405 | .disable = regulator_disable_regmap, | |
406 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
407 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
8029a006 AL |
408 | .list_voltage = regulator_list_voltage_linear, |
409 | .map_voltage = regulator_map_voltage_linear, | |
e5ce4208 GG |
410 | }; |
411 | ||
412 | static int palmas_is_enabled_ldo(struct regulator_dev *dev) | |
413 | { | |
414 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
415 | int id = rdev_get_id(dev); | |
416 | unsigned int reg; | |
417 | ||
418 | palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); | |
419 | ||
420 | reg &= PALMAS_LDO1_CTRL_STATUS; | |
421 | ||
422 | return !!(reg); | |
423 | } | |
424 | ||
425 | static int palmas_list_voltage_ldo(struct regulator_dev *dev, | |
426 | unsigned selector) | |
427 | { | |
428 | if (!selector) | |
429 | return 0; | |
430 | ||
431 | /* voltage is 0.85V + (selector * 0.05v) */ | |
432 | return 850000 + (selector * 50000); | |
433 | } | |
434 | ||
435 | static int palmas_get_voltage_ldo_sel(struct regulator_dev *dev) | |
436 | { | |
437 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
438 | int id = rdev_get_id(dev); | |
439 | int selector; | |
440 | unsigned int reg; | |
441 | unsigned int addr; | |
442 | ||
443 | addr = palmas_regs_info[id].vsel_addr; | |
444 | ||
445 | palmas_ldo_read(pmic->palmas, addr, ®); | |
446 | ||
447 | selector = reg & PALMAS_LDO1_VOLTAGE_VSEL_MASK; | |
448 | ||
449 | /* Adjust selector to match list_voltage ranges */ | |
450 | if (selector > 49) | |
451 | selector = 49; | |
452 | ||
453 | return selector; | |
454 | } | |
455 | ||
456 | static int palmas_set_voltage_ldo_sel(struct regulator_dev *dev, | |
457 | unsigned selector) | |
458 | { | |
459 | struct palmas_pmic *pmic = rdev_get_drvdata(dev); | |
460 | int id = rdev_get_id(dev); | |
461 | unsigned int reg = 0; | |
462 | unsigned int addr; | |
463 | ||
464 | addr = palmas_regs_info[id].vsel_addr; | |
465 | ||
466 | reg = selector; | |
467 | ||
468 | palmas_ldo_write(pmic->palmas, addr, reg); | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | static int palmas_map_voltage_ldo(struct regulator_dev *rdev, | |
474 | int min_uV, int max_uV) | |
475 | { | |
476 | int ret, voltage; | |
477 | ||
478 | ret = ((min_uV - 900000) / 50000) + 1; | |
479 | if (ret < 0) | |
480 | return ret; | |
481 | ||
482 | /* Map back into a voltage to verify we're still in bounds */ | |
483 | voltage = palmas_list_voltage_ldo(rdev, ret); | |
484 | if (voltage < min_uV || voltage > max_uV) | |
485 | return -EINVAL; | |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
490 | static struct regulator_ops palmas_ops_ldo = { | |
491 | .is_enabled = palmas_is_enabled_ldo, | |
492 | .enable = regulator_enable_regmap, | |
493 | .disable = regulator_disable_regmap, | |
494 | .get_voltage_sel = palmas_get_voltage_ldo_sel, | |
495 | .set_voltage_sel = palmas_set_voltage_ldo_sel, | |
496 | .list_voltage = palmas_list_voltage_ldo, | |
497 | .map_voltage = palmas_map_voltage_ldo, | |
498 | }; | |
499 | ||
500 | /* | |
501 | * setup the hardware based sleep configuration of the SMPS/LDO regulators | |
502 | * from the platform data. This is different to the software based control | |
503 | * supported by the regulator framework as it is controlled by toggling | |
504 | * pins on the PMIC such as PREQ, SYSEN, ... | |
505 | */ | |
506 | static int palmas_smps_init(struct palmas *palmas, int id, | |
507 | struct palmas_reg_init *reg_init) | |
508 | { | |
509 | unsigned int reg; | |
510 | unsigned int addr; | |
511 | int ret; | |
512 | ||
513 | addr = palmas_regs_info[id].ctrl_addr; | |
514 | ||
515 | ret = palmas_smps_read(palmas, addr, ®); | |
516 | if (ret) | |
517 | return ret; | |
518 | ||
519 | if (id != PALMAS_REG_SMPS10) { | |
520 | if (reg_init->warm_reset) | |
521 | reg |= PALMAS_SMPS12_CTRL_WR_S; | |
522 | ||
523 | if (reg_init->roof_floor) | |
524 | reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN; | |
525 | ||
526 | if (reg_init->mode_sleep) { | |
527 | reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK; | |
528 | reg |= reg_init->mode_sleep << | |
529 | PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT; | |
530 | } | |
531 | } else { | |
532 | if (reg_init->mode_sleep) { | |
533 | reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK; | |
534 | reg |= reg_init->mode_sleep << | |
535 | PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT; | |
536 | } | |
537 | ||
538 | } | |
539 | ret = palmas_smps_write(palmas, addr, reg); | |
540 | if (ret) | |
541 | return ret; | |
542 | ||
543 | if (palmas_regs_info[id].tstep_addr && reg_init->tstep) { | |
544 | addr = palmas_regs_info[id].tstep_addr; | |
545 | ||
546 | reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK; | |
547 | ||
548 | ret = palmas_smps_write(palmas, addr, reg); | |
549 | if (ret) | |
550 | return ret; | |
551 | } | |
552 | ||
553 | if (palmas_regs_info[id].vsel_addr && reg_init->vsel) { | |
554 | addr = palmas_regs_info[id].vsel_addr; | |
555 | ||
556 | reg = reg_init->vsel; | |
557 | ||
558 | ret = palmas_smps_write(palmas, addr, reg); | |
559 | if (ret) | |
560 | return ret; | |
561 | } | |
562 | ||
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | static int palmas_ldo_init(struct palmas *palmas, int id, | |
568 | struct palmas_reg_init *reg_init) | |
569 | { | |
570 | unsigned int reg; | |
571 | unsigned int addr; | |
572 | int ret; | |
573 | ||
574 | addr = palmas_regs_info[id].ctrl_addr; | |
575 | ||
576 | ret = palmas_smps_read(palmas, addr, ®); | |
577 | if (ret) | |
578 | return ret; | |
579 | ||
580 | if (reg_init->warm_reset) | |
581 | reg |= PALMAS_LDO1_CTRL_WR_S; | |
582 | ||
583 | if (reg_init->mode_sleep) | |
584 | reg |= PALMAS_LDO1_CTRL_MODE_SLEEP; | |
585 | ||
586 | ret = palmas_smps_write(palmas, addr, reg); | |
587 | if (ret) | |
588 | return ret; | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static __devinit int palmas_probe(struct platform_device *pdev) | |
594 | { | |
595 | struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); | |
596 | struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data; | |
597 | struct regulator_dev *rdev; | |
598 | struct regulator_config config = { }; | |
599 | struct palmas_pmic *pmic; | |
600 | struct palmas_reg_init *reg_init; | |
601 | int id = 0, ret; | |
602 | unsigned int addr, reg; | |
603 | ||
604 | if (!pdata) | |
605 | return -EINVAL; | |
606 | if (!pdata->reg_data) | |
607 | return -EINVAL; | |
608 | ||
609 | pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); | |
610 | if (!pmic) | |
611 | return -ENOMEM; | |
612 | ||
613 | pmic->dev = &pdev->dev; | |
614 | pmic->palmas = palmas; | |
615 | palmas->pmic = pmic; | |
616 | platform_set_drvdata(pdev, pmic); | |
617 | ||
618 | ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, ®); | |
619 | if (ret) | |
620 | goto err_unregister_regulator; | |
621 | ||
622 | if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN) | |
623 | pmic->smps123 = 1; | |
624 | ||
625 | if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN) | |
626 | pmic->smps457 = 1; | |
627 | ||
628 | config.regmap = palmas->regmap[REGULATOR_SLAVE]; | |
629 | config.dev = &pdev->dev; | |
630 | config.driver_data = pmic; | |
631 | ||
632 | for (id = 0; id < PALMAS_REG_LDO1; id++) { | |
633 | ||
634 | /* | |
635 | * Miss out regulators which are not available due | |
636 | * to slaving configurations. | |
637 | */ | |
638 | switch (id) { | |
639 | case PALMAS_REG_SMPS12: | |
640 | case PALMAS_REG_SMPS3: | |
641 | if (pmic->smps123) | |
642 | continue; | |
643 | break; | |
644 | case PALMAS_REG_SMPS123: | |
645 | if (!pmic->smps123) | |
646 | continue; | |
647 | break; | |
648 | case PALMAS_REG_SMPS45: | |
649 | case PALMAS_REG_SMPS7: | |
650 | if (pmic->smps457) | |
651 | continue; | |
652 | break; | |
653 | case PALMAS_REG_SMPS457: | |
654 | if (!pmic->smps457) | |
655 | continue; | |
656 | } | |
657 | ||
658 | /* Register the regulators */ | |
659 | pmic->desc[id].name = palmas_regs_info[id].name; | |
660 | pmic->desc[id].id = id; | |
661 | ||
662 | if (id != PALMAS_REG_SMPS10) { | |
663 | pmic->desc[id].ops = &palmas_ops_smps; | |
664 | pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES; | |
665 | } else { | |
666 | pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES; | |
667 | pmic->desc[id].ops = &palmas_ops_smps10; | |
668 | pmic->desc[id].vsel_reg = PALMAS_SMPS10_CTRL; | |
669 | pmic->desc[id].vsel_mask = SMPS10_VSEL; | |
670 | pmic->desc[id].enable_reg = PALMAS_SMPS10_STATUS; | |
671 | pmic->desc[id].enable_mask = SMPS10_BOOST_EN; | |
8029a006 AL |
672 | pmic->desc[id].min_uV = 3750000; |
673 | pmic->desc[id].uV_step = 1250000; | |
e5ce4208 GG |
674 | } |
675 | ||
676 | pmic->desc[id].type = REGULATOR_VOLTAGE; | |
677 | pmic->desc[id].owner = THIS_MODULE; | |
678 | ||
679 | /* Initialise sleep/init values from platform data */ | |
680 | if (pdata && pdata->reg_init) { | |
681 | reg_init = pdata->reg_init[id]; | |
682 | if (reg_init) { | |
683 | ret = palmas_smps_init(palmas, id, reg_init); | |
684 | if (ret) | |
685 | goto err_unregister_regulator; | |
686 | } | |
687 | } | |
688 | ||
689 | /* | |
690 | * read and store the RANGE bit for later use | |
691 | * This must be done before regulator is probed otherwise | |
692 | * we error in probe with unsuportable ranges. | |
693 | */ | |
694 | if (id != PALMAS_REG_SMPS10) { | |
695 | addr = palmas_regs_info[id].vsel_addr; | |
696 | ||
697 | ret = palmas_smps_read(pmic->palmas, addr, ®); | |
698 | if (ret) | |
699 | goto err_unregister_regulator; | |
700 | if (reg & PALMAS_SMPS12_VOLTAGE_RANGE) | |
701 | pmic->range[id] = 1; | |
702 | } | |
703 | ||
704 | if (pdata && pdata->reg_data) | |
705 | config.init_data = pdata->reg_data[id]; | |
706 | else | |
707 | config.init_data = NULL; | |
708 | ||
709 | rdev = regulator_register(&pmic->desc[id], &config); | |
710 | if (IS_ERR(rdev)) { | |
711 | dev_err(&pdev->dev, | |
712 | "failed to register %s regulator\n", | |
713 | pdev->name); | |
714 | ret = PTR_ERR(rdev); | |
715 | goto err_unregister_regulator; | |
716 | } | |
717 | ||
718 | /* Save regulator for cleanup */ | |
719 | pmic->rdev[id] = rdev; | |
720 | } | |
721 | ||
722 | /* Start this loop from the id left from previous loop */ | |
723 | for (; id < PALMAS_NUM_REGS; id++) { | |
724 | ||
725 | /* Miss out regulators which are not available due | |
726 | * to alternate functions. | |
727 | */ | |
728 | ||
729 | /* Register the regulators */ | |
730 | pmic->desc[id].name = palmas_regs_info[id].name; | |
731 | pmic->desc[id].id = id; | |
732 | pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES; | |
733 | ||
734 | pmic->desc[id].ops = &palmas_ops_ldo; | |
735 | ||
736 | pmic->desc[id].type = REGULATOR_VOLTAGE; | |
737 | pmic->desc[id].owner = THIS_MODULE; | |
738 | pmic->desc[id].enable_reg = palmas_regs_info[id].ctrl_addr; | |
739 | pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE; | |
740 | ||
741 | if (pdata && pdata->reg_data) | |
742 | config.init_data = pdata->reg_data[id]; | |
743 | else | |
744 | config.init_data = NULL; | |
745 | ||
746 | rdev = regulator_register(&pmic->desc[id], &config); | |
747 | if (IS_ERR(rdev)) { | |
748 | dev_err(&pdev->dev, | |
749 | "failed to register %s regulator\n", | |
750 | pdev->name); | |
751 | ret = PTR_ERR(rdev); | |
752 | goto err_unregister_regulator; | |
753 | } | |
754 | ||
755 | /* Save regulator for cleanup */ | |
756 | pmic->rdev[id] = rdev; | |
757 | ||
758 | /* Initialise sleep/init values from platform data */ | |
759 | if (pdata->reg_init) { | |
760 | reg_init = pdata->reg_init[id]; | |
761 | if (reg_init) { | |
762 | ret = palmas_ldo_init(palmas, id, reg_init); | |
763 | if (ret) | |
764 | goto err_unregister_regulator; | |
765 | } | |
766 | } | |
767 | } | |
768 | ||
769 | return 0; | |
770 | ||
771 | err_unregister_regulator: | |
772 | while (--id >= 0) | |
773 | regulator_unregister(pmic->rdev[id]); | |
774 | kfree(pmic->rdev); | |
775 | kfree(pmic->desc); | |
776 | kfree(pmic); | |
777 | return ret; | |
778 | } | |
779 | ||
780 | static int __devexit palmas_remove(struct platform_device *pdev) | |
781 | { | |
782 | struct palmas_pmic *pmic = platform_get_drvdata(pdev); | |
783 | int id; | |
784 | ||
785 | for (id = 0; id < PALMAS_NUM_REGS; id++) | |
786 | regulator_unregister(pmic->rdev[id]); | |
787 | ||
788 | kfree(pmic->rdev); | |
789 | kfree(pmic->desc); | |
790 | kfree(pmic); | |
791 | return 0; | |
792 | } | |
793 | ||
794 | static struct platform_driver palmas_driver = { | |
795 | .driver = { | |
796 | .name = "palmas-pmic", | |
797 | .owner = THIS_MODULE, | |
798 | }, | |
799 | .probe = palmas_probe, | |
800 | .remove = __devexit_p(palmas_remove), | |
801 | }; | |
802 | ||
803 | static int __init palmas_init(void) | |
804 | { | |
805 | return platform_driver_register(&palmas_driver); | |
806 | } | |
807 | subsys_initcall(palmas_init); | |
808 | ||
809 | static void __exit palmas_exit(void) | |
810 | { | |
811 | platform_driver_unregister(&palmas_driver); | |
812 | } | |
813 | module_exit(palmas_exit); | |
814 | ||
815 | MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); | |
816 | MODULE_DESCRIPTION("Palmas voltage regulator driver"); | |
817 | MODULE_LICENSE("GPL"); | |
818 | MODULE_ALIAS("platform:palmas-pmic"); |