nfs: move nfs_file_operations declaration to bottom of file.c (try #2)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / regulator / tps6507x-regulator.c
blobbdef70365f52b5c1c01ae30cd66d194d31c820ac
1 /*
2 * tps6507x-regulator.c
4 * Regulator driver for TPS65073 PMIC
6 * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation version 2.
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
13 * whether express or implied; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/err.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/machine.h>
25 #include <linux/regulator/tps6507x.h>
26 #include <linux/delay.h>
27 #include <linux/slab.h>
28 #include <linux/mfd/tps6507x.h>
30 /* DCDC's */
31 #define TPS6507X_DCDC_1 0
32 #define TPS6507X_DCDC_2 1
33 #define TPS6507X_DCDC_3 2
34 /* LDOs */
35 #define TPS6507X_LDO_1 3
36 #define TPS6507X_LDO_2 4
38 #define TPS6507X_MAX_REG_ID TPS6507X_LDO_2
40 /* Number of step-down converters available */
41 #define TPS6507X_NUM_DCDC 3
42 /* Number of LDO voltage regulators available */
43 #define TPS6507X_NUM_LDO 2
44 /* Number of total regulators available */
45 #define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
47 /* Supported voltage values for regulators (in milliVolts) */
48 static const u16 VDCDCx_VSEL_table[] = {
49 725, 750, 775, 800,
50 825, 850, 875, 900,
51 925, 950, 975, 1000,
52 1025, 1050, 1075, 1100,
53 1125, 1150, 1175, 1200,
54 1225, 1250, 1275, 1300,
55 1325, 1350, 1375, 1400,
56 1425, 1450, 1475, 1500,
57 1550, 1600, 1650, 1700,
58 1750, 1800, 1850, 1900,
59 1950, 2000, 2050, 2100,
60 2150, 2200, 2250, 2300,
61 2350, 2400, 2450, 2500,
62 2550, 2600, 2650, 2700,
63 2750, 2800, 2850, 2900,
64 3000, 3100, 3200, 3300,
67 static const u16 LDO1_VSEL_table[] = {
68 1000, 1100, 1200, 1250,
69 1300, 1350, 1400, 1500,
70 1600, 1800, 2500, 2750,
71 2800, 3000, 3100, 3300,
74 static const u16 LDO2_VSEL_table[] = {
75 725, 750, 775, 800,
76 825, 850, 875, 900,
77 925, 950, 975, 1000,
78 1025, 1050, 1075, 1100,
79 1125, 1150, 1175, 1200,
80 1225, 1250, 1275, 1300,
81 1325, 1350, 1375, 1400,
82 1425, 1450, 1475, 1500,
83 1550, 1600, 1650, 1700,
84 1750, 1800, 1850, 1900,
85 1950, 2000, 2050, 2100,
86 2150, 2200, 2250, 2300,
87 2350, 2400, 2450, 2500,
88 2550, 2600, 2650, 2700,
89 2750, 2800, 2850, 2900,
90 3000, 3100, 3200, 3300,
93 struct tps_info {
94 const char *name;
95 unsigned min_uV;
96 unsigned max_uV;
97 u8 table_len;
98 const u16 *table;
100 /* Does DCDC high or the low register defines output voltage? */
101 bool defdcdc_default;
104 static struct tps_info tps6507x_pmic_regs[] = {
106 .name = "VDCDC1",
107 .min_uV = 725000,
108 .max_uV = 3300000,
109 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
110 .table = VDCDCx_VSEL_table,
113 .name = "VDCDC2",
114 .min_uV = 725000,
115 .max_uV = 3300000,
116 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
117 .table = VDCDCx_VSEL_table,
120 .name = "VDCDC3",
121 .min_uV = 725000,
122 .max_uV = 3300000,
123 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
124 .table = VDCDCx_VSEL_table,
127 .name = "LDO1",
128 .min_uV = 1000000,
129 .max_uV = 3300000,
130 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
131 .table = LDO1_VSEL_table,
134 .name = "LDO2",
135 .min_uV = 725000,
136 .max_uV = 3300000,
137 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
138 .table = LDO2_VSEL_table,
142 struct tps6507x_pmic {
143 struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
144 struct tps6507x_dev *mfd;
145 struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
146 struct tps_info *info[TPS6507X_NUM_REGULATOR];
147 struct mutex io_lock;
149 static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
151 u8 val;
152 int err;
154 err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
156 if (err)
157 return err;
159 return val;
162 static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
164 return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
167 static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
169 int err, data;
171 mutex_lock(&tps->io_lock);
173 data = tps6507x_pmic_read(tps, reg);
174 if (data < 0) {
175 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
176 err = data;
177 goto out;
180 data |= mask;
181 err = tps6507x_pmic_write(tps, reg, data);
182 if (err)
183 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
185 out:
186 mutex_unlock(&tps->io_lock);
187 return err;
190 static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
192 int err, data;
194 mutex_lock(&tps->io_lock);
196 data = tps6507x_pmic_read(tps, reg);
197 if (data < 0) {
198 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
199 err = data;
200 goto out;
203 data &= ~mask;
204 err = tps6507x_pmic_write(tps, reg, data);
205 if (err)
206 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
208 out:
209 mutex_unlock(&tps->io_lock);
210 return err;
213 static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
215 int data;
217 mutex_lock(&tps->io_lock);
219 data = tps6507x_pmic_read(tps, reg);
220 if (data < 0)
221 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
223 mutex_unlock(&tps->io_lock);
224 return data;
227 static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
229 int err;
231 mutex_lock(&tps->io_lock);
233 err = tps6507x_pmic_write(tps, reg, val);
234 if (err < 0)
235 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
237 mutex_unlock(&tps->io_lock);
238 return err;
241 static int tps6507x_pmic_dcdc_is_enabled(struct regulator_dev *dev)
243 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
244 int data, dcdc = rdev_get_id(dev);
245 u8 shift;
247 if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
248 return -EINVAL;
250 shift = TPS6507X_MAX_REG_ID - dcdc;
251 data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
253 if (data < 0)
254 return data;
255 else
256 return (data & 1<<shift) ? 1 : 0;
259 static int tps6507x_pmic_ldo_is_enabled(struct regulator_dev *dev)
261 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
262 int data, ldo = rdev_get_id(dev);
263 u8 shift;
265 if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
266 return -EINVAL;
268 shift = TPS6507X_MAX_REG_ID - ldo;
269 data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
271 if (data < 0)
272 return data;
273 else
274 return (data & 1<<shift) ? 1 : 0;
277 static int tps6507x_pmic_dcdc_enable(struct regulator_dev *dev)
279 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
280 int dcdc = rdev_get_id(dev);
281 u8 shift;
283 if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
284 return -EINVAL;
286 shift = TPS6507X_MAX_REG_ID - dcdc;
287 return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
290 static int tps6507x_pmic_dcdc_disable(struct regulator_dev *dev)
292 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
293 int dcdc = rdev_get_id(dev);
294 u8 shift;
296 if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
297 return -EINVAL;
299 shift = TPS6507X_MAX_REG_ID - dcdc;
300 return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
301 1 << shift);
304 static int tps6507x_pmic_ldo_enable(struct regulator_dev *dev)
306 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
307 int ldo = rdev_get_id(dev);
308 u8 shift;
310 if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
311 return -EINVAL;
313 shift = TPS6507X_MAX_REG_ID - ldo;
314 return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
317 static int tps6507x_pmic_ldo_disable(struct regulator_dev *dev)
319 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
320 int ldo = rdev_get_id(dev);
321 u8 shift;
323 if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
324 return -EINVAL;
326 shift = TPS6507X_MAX_REG_ID - ldo;
327 return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
328 1 << shift);
331 static int tps6507x_pmic_dcdc_get_voltage(struct regulator_dev *dev)
333 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
334 int data, dcdc = rdev_get_id(dev);
335 u8 reg;
337 switch (dcdc) {
338 case TPS6507X_DCDC_1:
339 reg = TPS6507X_REG_DEFDCDC1;
340 break;
341 case TPS6507X_DCDC_2:
342 if (tps->info[dcdc]->defdcdc_default)
343 reg = TPS6507X_REG_DEFDCDC2_HIGH;
344 else
345 reg = TPS6507X_REG_DEFDCDC2_LOW;
346 break;
347 case TPS6507X_DCDC_3:
348 if (tps->info[dcdc]->defdcdc_default)
349 reg = TPS6507X_REG_DEFDCDC3_HIGH;
350 else
351 reg = TPS6507X_REG_DEFDCDC3_LOW;
352 break;
353 default:
354 return -EINVAL;
357 data = tps6507x_pmic_reg_read(tps, reg);
358 if (data < 0)
359 return data;
361 data &= TPS6507X_DEFDCDCX_DCDC_MASK;
362 return tps->info[dcdc]->table[data] * 1000;
365 static int tps6507x_pmic_dcdc_set_voltage(struct regulator_dev *dev,
366 int min_uV, int max_uV,
367 unsigned *selector)
369 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
370 int data, vsel, dcdc = rdev_get_id(dev);
371 u8 reg;
373 switch (dcdc) {
374 case TPS6507X_DCDC_1:
375 reg = TPS6507X_REG_DEFDCDC1;
376 break;
377 case TPS6507X_DCDC_2:
378 if (tps->info[dcdc]->defdcdc_default)
379 reg = TPS6507X_REG_DEFDCDC2_HIGH;
380 else
381 reg = TPS6507X_REG_DEFDCDC2_LOW;
382 break;
383 case TPS6507X_DCDC_3:
384 if (tps->info[dcdc]->defdcdc_default)
385 reg = TPS6507X_REG_DEFDCDC3_HIGH;
386 else
387 reg = TPS6507X_REG_DEFDCDC3_LOW;
388 break;
389 default:
390 return -EINVAL;
393 if (min_uV < tps->info[dcdc]->min_uV
394 || min_uV > tps->info[dcdc]->max_uV)
395 return -EINVAL;
396 if (max_uV < tps->info[dcdc]->min_uV
397 || max_uV > tps->info[dcdc]->max_uV)
398 return -EINVAL;
400 for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
401 int mV = tps->info[dcdc]->table[vsel];
402 int uV = mV * 1000;
404 /* Break at the first in-range value */
405 if (min_uV <= uV && uV <= max_uV)
406 break;
409 /* write to the register in case we found a match */
410 if (vsel == tps->info[dcdc]->table_len)
411 return -EINVAL;
413 *selector = vsel;
415 data = tps6507x_pmic_reg_read(tps, reg);
416 if (data < 0)
417 return data;
419 data &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
420 data |= vsel;
422 return tps6507x_pmic_reg_write(tps, reg, data);
425 static int tps6507x_pmic_ldo_get_voltage(struct regulator_dev *dev)
427 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
428 int data, ldo = rdev_get_id(dev);
429 u8 reg, mask;
431 if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
432 return -EINVAL;
433 else {
434 reg = (ldo == TPS6507X_LDO_1 ?
435 TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
436 mask = (ldo == TPS6507X_LDO_1 ?
437 TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
438 TPS6507X_REG_DEFLDO2_LDO2_MASK);
441 data = tps6507x_pmic_reg_read(tps, reg);
442 if (data < 0)
443 return data;
445 data &= mask;
446 return tps->info[ldo]->table[data] * 1000;
449 static int tps6507x_pmic_ldo_set_voltage(struct regulator_dev *dev,
450 int min_uV, int max_uV,
451 unsigned *selector)
453 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
454 int data, vsel, ldo = rdev_get_id(dev);
455 u8 reg, mask;
457 if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
458 return -EINVAL;
459 else {
460 reg = (ldo == TPS6507X_LDO_1 ?
461 TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
462 mask = (ldo == TPS6507X_LDO_1 ?
463 TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
464 TPS6507X_REG_DEFLDO2_LDO2_MASK);
467 if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
468 return -EINVAL;
469 if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
470 return -EINVAL;
472 for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
473 int mV = tps->info[ldo]->table[vsel];
474 int uV = mV * 1000;
476 /* Break at the first in-range value */
477 if (min_uV <= uV && uV <= max_uV)
478 break;
481 if (vsel == tps->info[ldo]->table_len)
482 return -EINVAL;
484 *selector = vsel;
486 data = tps6507x_pmic_reg_read(tps, reg);
487 if (data < 0)
488 return data;
490 data &= ~mask;
491 data |= vsel;
493 return tps6507x_pmic_reg_write(tps, reg, data);
496 static int tps6507x_pmic_dcdc_list_voltage(struct regulator_dev *dev,
497 unsigned selector)
499 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
500 int dcdc = rdev_get_id(dev);
502 if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
503 return -EINVAL;
505 if (selector >= tps->info[dcdc]->table_len)
506 return -EINVAL;
507 else
508 return tps->info[dcdc]->table[selector] * 1000;
511 static int tps6507x_pmic_ldo_list_voltage(struct regulator_dev *dev,
512 unsigned selector)
514 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
515 int ldo = rdev_get_id(dev);
517 if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
518 return -EINVAL;
520 if (selector >= tps->info[ldo]->table_len)
521 return -EINVAL;
522 else
523 return tps->info[ldo]->table[selector] * 1000;
526 /* Operations permitted on VDCDCx */
527 static struct regulator_ops tps6507x_pmic_dcdc_ops = {
528 .is_enabled = tps6507x_pmic_dcdc_is_enabled,
529 .enable = tps6507x_pmic_dcdc_enable,
530 .disable = tps6507x_pmic_dcdc_disable,
531 .get_voltage = tps6507x_pmic_dcdc_get_voltage,
532 .set_voltage = tps6507x_pmic_dcdc_set_voltage,
533 .list_voltage = tps6507x_pmic_dcdc_list_voltage,
536 /* Operations permitted on LDOx */
537 static struct regulator_ops tps6507x_pmic_ldo_ops = {
538 .is_enabled = tps6507x_pmic_ldo_is_enabled,
539 .enable = tps6507x_pmic_ldo_enable,
540 .disable = tps6507x_pmic_ldo_disable,
541 .get_voltage = tps6507x_pmic_ldo_get_voltage,
542 .set_voltage = tps6507x_pmic_ldo_set_voltage,
543 .list_voltage = tps6507x_pmic_ldo_list_voltage,
546 static __devinit
547 int tps6507x_pmic_probe(struct platform_device *pdev)
549 struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
550 struct tps_info *info = &tps6507x_pmic_regs[0];
551 struct regulator_init_data *init_data;
552 struct regulator_dev *rdev;
553 struct tps6507x_pmic *tps;
554 struct tps6507x_board *tps_board;
555 int i;
556 int error;
559 * tps_board points to pmic related constants
560 * coming from the board-evm file.
563 tps_board = dev_get_platdata(tps6507x_dev->dev);
564 if (!tps_board)
565 return -EINVAL;
568 * init_data points to array of regulator_init structures
569 * coming from the board-evm file.
571 init_data = tps_board->tps6507x_pmic_init_data;
572 if (!init_data)
573 return -EINVAL;
575 tps = kzalloc(sizeof(*tps), GFP_KERNEL);
576 if (!tps)
577 return -ENOMEM;
579 mutex_init(&tps->io_lock);
581 /* common for all regulators */
582 tps->mfd = tps6507x_dev;
584 for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
585 /* Register the regulators */
586 tps->info[i] = info;
587 if (init_data->driver_data) {
588 struct tps6507x_reg_platform_data *data =
589 init_data->driver_data;
590 tps->info[i]->defdcdc_default = data->defdcdc_default;
593 tps->desc[i].name = info->name;
594 tps->desc[i].id = i;
595 tps->desc[i].n_voltages = info->table_len;
596 tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
597 &tps6507x_pmic_ldo_ops : &tps6507x_pmic_dcdc_ops);
598 tps->desc[i].type = REGULATOR_VOLTAGE;
599 tps->desc[i].owner = THIS_MODULE;
601 rdev = regulator_register(&tps->desc[i],
602 tps6507x_dev->dev, init_data, tps);
603 if (IS_ERR(rdev)) {
604 dev_err(tps6507x_dev->dev,
605 "failed to register %s regulator\n",
606 pdev->name);
607 error = PTR_ERR(rdev);
608 goto fail;
611 /* Save regulator for cleanup */
612 tps->rdev[i] = rdev;
615 tps6507x_dev->pmic = tps;
616 platform_set_drvdata(pdev, tps6507x_dev);
618 return 0;
620 fail:
621 while (--i >= 0)
622 regulator_unregister(tps->rdev[i]);
624 kfree(tps);
625 return error;
628 static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
630 struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
631 struct tps6507x_pmic *tps = tps6507x_dev->pmic;
632 int i;
634 for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
635 regulator_unregister(tps->rdev[i]);
637 kfree(tps);
639 return 0;
642 static struct platform_driver tps6507x_pmic_driver = {
643 .driver = {
644 .name = "tps6507x-pmic",
645 .owner = THIS_MODULE,
647 .probe = tps6507x_pmic_probe,
648 .remove = __devexit_p(tps6507x_pmic_remove),
652 * tps6507x_pmic_init
654 * Module init function
656 static int __init tps6507x_pmic_init(void)
658 return platform_driver_register(&tps6507x_pmic_driver);
660 subsys_initcall(tps6507x_pmic_init);
663 * tps6507x_pmic_cleanup
665 * Module exit function
667 static void __exit tps6507x_pmic_cleanup(void)
669 platform_driver_unregister(&tps6507x_pmic_driver);
671 module_exit(tps6507x_pmic_cleanup);
673 MODULE_AUTHOR("Texas Instruments");
674 MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
675 MODULE_LICENSE("GPL v2");
676 MODULE_ALIAS("platform:tps6507x-pmic");