tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * tps6507x-regulator.c
3 *
4 * Regulator driver for TPS65073 PMIC
5 *
6 * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
7 *
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.
11 *
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.
16 */
17
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/slab.h>
27#include <linux/mfd/tps6507x.h>
28
29/* DCDC's */
30#define TPS6507X_DCDC_1 0
31#define TPS6507X_DCDC_2 1
32#define TPS6507X_DCDC_3 2
33/* LDOs */
34#define TPS6507X_LDO_1 3
35#define TPS6507X_LDO_2 4
36
37#define TPS6507X_MAX_REG_ID TPS6507X_LDO_2
38
39/* Number of step-down converters available */
40#define TPS6507X_NUM_DCDC 3
41/* Number of LDO voltage regulators available */
42#define TPS6507X_NUM_LDO 2
43/* Number of total regulators available */
44#define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
45
46/* Supported voltage values for regulators (in milliVolts) */
47static const u16 VDCDCx_VSEL_table[] = {
48 725, 750, 775, 800,
49 825, 850, 875, 900,
50 925, 950, 975, 1000,
51 1025, 1050, 1075, 1100,
52 1125, 1150, 1175, 1200,
53 1225, 1250, 1275, 1300,
54 1325, 1350, 1375, 1400,
55 1425, 1450, 1475, 1500,
56 1550, 1600, 1650, 1700,
57 1750, 1800, 1850, 1900,
58 1950, 2000, 2050, 2100,
59 2150, 2200, 2250, 2300,
60 2350, 2400, 2450, 2500,
61 2550, 2600, 2650, 2700,
62 2750, 2800, 2850, 2900,
63 3000, 3100, 3200, 3300,
64};
65
66static const u16 LDO1_VSEL_table[] = {
67 1000, 1100, 1200, 1250,
68 1300, 1350, 1400, 1500,
69 1600, 1800, 2500, 2750,
70 2800, 3000, 3100, 3300,
71};
72
73static const u16 LDO2_VSEL_table[] = {
74 725, 750, 775, 800,
75 825, 850, 875, 900,
76 925, 950, 975, 1000,
77 1025, 1050, 1075, 1100,
78 1125, 1150, 1175, 1200,
79 1225, 1250, 1275, 1300,
80 1325, 1350, 1375, 1400,
81 1425, 1450, 1475, 1500,
82 1550, 1600, 1650, 1700,
83 1750, 1800, 1850, 1900,
84 1950, 2000, 2050, 2100,
85 2150, 2200, 2250, 2300,
86 2350, 2400, 2450, 2500,
87 2550, 2600, 2650, 2700,
88 2750, 2800, 2850, 2900,
89 3000, 3100, 3200, 3300,
90};
91
92struct tps_info {
93 const char *name;
94 unsigned min_uV;
95 unsigned max_uV;
96 u8 table_len;
97 const u16 *table;
98
99 /* Does DCDC high or the low register defines output voltage? */
100 bool defdcdc_default;
101};
102
103static struct tps_info tps6507x_pmic_regs[] = {
104 {
105 .name = "VDCDC1",
106 .min_uV = 725000,
107 .max_uV = 3300000,
108 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
109 .table = VDCDCx_VSEL_table,
110 },
111 {
112 .name = "VDCDC2",
113 .min_uV = 725000,
114 .max_uV = 3300000,
115 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
116 .table = VDCDCx_VSEL_table,
117 },
118 {
119 .name = "VDCDC3",
120 .min_uV = 725000,
121 .max_uV = 3300000,
122 .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
123 .table = VDCDCx_VSEL_table,
124 },
125 {
126 .name = "LDO1",
127 .min_uV = 1000000,
128 .max_uV = 3300000,
129 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
130 .table = LDO1_VSEL_table,
131 },
132 {
133 .name = "LDO2",
134 .min_uV = 725000,
135 .max_uV = 3300000,
136 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
137 .table = LDO2_VSEL_table,
138 },
139};
140
141struct tps6507x_pmic {
142 struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
143 struct tps6507x_dev *mfd;
144 struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
145 struct tps_info *info[TPS6507X_NUM_REGULATOR];
146 struct mutex io_lock;
147};
148static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
149{
150 u8 val;
151 int err;
152
153 err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
154
155 if (err)
156 return err;
157
158 return val;
159}
160
161static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
162{
163 return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
164}
165
166static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
167{
168 int err, data;
169
170 mutex_lock(&tps->io_lock);
171
172 data = tps6507x_pmic_read(tps, reg);
173 if (data < 0) {
174 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
175 err = data;
176 goto out;
177 }
178
179 data |= mask;
180 err = tps6507x_pmic_write(tps, reg, data);
181 if (err)
182 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
183
184out:
185 mutex_unlock(&tps->io_lock);
186 return err;
187}
188
189static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
190{
191 int err, data;
192
193 mutex_lock(&tps->io_lock);
194
195 data = tps6507x_pmic_read(tps, reg);
196 if (data < 0) {
197 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
198 err = data;
199 goto out;
200 }
201
202 data &= ~mask;
203 err = tps6507x_pmic_write(tps, reg, data);
204 if (err)
205 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
206
207out:
208 mutex_unlock(&tps->io_lock);
209 return err;
210}
211
212static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
213{
214 int data;
215
216 mutex_lock(&tps->io_lock);
217
218 data = tps6507x_pmic_read(tps, reg);
219 if (data < 0)
220 dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
221
222 mutex_unlock(&tps->io_lock);
223 return data;
224}
225
226static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
227{
228 int err;
229
230 mutex_lock(&tps->io_lock);
231
232 err = tps6507x_pmic_write(tps, reg, val);
233 if (err < 0)
234 dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
235
236 mutex_unlock(&tps->io_lock);
237 return err;
238}
239
240static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
241{
242 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
243 int data, rid = rdev_get_id(dev);
244 u8 shift;
245
246 if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
247 return -EINVAL;
248
249 shift = TPS6507X_MAX_REG_ID - rid;
250 data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
251
252 if (data < 0)
253 return data;
254 else
255 return (data & 1<<shift) ? 1 : 0;
256}
257
258static int tps6507x_pmic_enable(struct regulator_dev *dev)
259{
260 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
261 int rid = rdev_get_id(dev);
262 u8 shift;
263
264 if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
265 return -EINVAL;
266
267 shift = TPS6507X_MAX_REG_ID - rid;
268 return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
269}
270
271static int tps6507x_pmic_disable(struct regulator_dev *dev)
272{
273 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
274 int rid = rdev_get_id(dev);
275 u8 shift;
276
277 if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
278 return -EINVAL;
279
280 shift = TPS6507X_MAX_REG_ID - rid;
281 return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
282 1 << shift);
283}
284
285static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
286{
287 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
288 int data, rid = rdev_get_id(dev);
289 u8 reg, mask;
290
291 switch (rid) {
292 case TPS6507X_DCDC_1:
293 reg = TPS6507X_REG_DEFDCDC1;
294 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
295 break;
296 case TPS6507X_DCDC_2:
297 if (tps->info[rid]->defdcdc_default)
298 reg = TPS6507X_REG_DEFDCDC2_HIGH;
299 else
300 reg = TPS6507X_REG_DEFDCDC2_LOW;
301 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
302 break;
303 case TPS6507X_DCDC_3:
304 if (tps->info[rid]->defdcdc_default)
305 reg = TPS6507X_REG_DEFDCDC3_HIGH;
306 else
307 reg = TPS6507X_REG_DEFDCDC3_LOW;
308 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
309 break;
310 case TPS6507X_LDO_1:
311 reg = TPS6507X_REG_LDO_CTRL1;
312 mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
313 break;
314 case TPS6507X_LDO_2:
315 reg = TPS6507X_REG_DEFLDO2;
316 mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
317 break;
318 default:
319 return -EINVAL;
320 }
321
322 data = tps6507x_pmic_reg_read(tps, reg);
323 if (data < 0)
324 return data;
325
326 data &= mask;
327 return data;
328}
329
330static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
331 unsigned selector)
332{
333 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
334 int data, rid = rdev_get_id(dev);
335 u8 reg, mask;
336
337 switch (rid) {
338 case TPS6507X_DCDC_1:
339 reg = TPS6507X_REG_DEFDCDC1;
340 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
341 break;
342 case TPS6507X_DCDC_2:
343 if (tps->info[rid]->defdcdc_default)
344 reg = TPS6507X_REG_DEFDCDC2_HIGH;
345 else
346 reg = TPS6507X_REG_DEFDCDC2_LOW;
347 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
348 break;
349 case TPS6507X_DCDC_3:
350 if (tps->info[rid]->defdcdc_default)
351 reg = TPS6507X_REG_DEFDCDC3_HIGH;
352 else
353 reg = TPS6507X_REG_DEFDCDC3_LOW;
354 mask = TPS6507X_DEFDCDCX_DCDC_MASK;
355 break;
356 case TPS6507X_LDO_1:
357 reg = TPS6507X_REG_LDO_CTRL1;
358 mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
359 break;
360 case TPS6507X_LDO_2:
361 reg = TPS6507X_REG_DEFLDO2;
362 mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
363 break;
364 default:
365 return -EINVAL;
366 }
367
368 data = tps6507x_pmic_reg_read(tps, reg);
369 if (data < 0)
370 return data;
371
372 data &= ~mask;
373 data |= selector;
374
375 return tps6507x_pmic_reg_write(tps, reg, data);
376}
377
378static int tps6507x_pmic_list_voltage(struct regulator_dev *dev,
379 unsigned selector)
380{
381 struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
382 int rid = rdev_get_id(dev);
383
384 if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
385 return -EINVAL;
386
387 if (selector >= tps->info[rid]->table_len)
388 return -EINVAL;
389 else
390 return tps->info[rid]->table[selector] * 1000;
391}
392
393static struct regulator_ops tps6507x_pmic_ops = {
394 .is_enabled = tps6507x_pmic_is_enabled,
395 .enable = tps6507x_pmic_enable,
396 .disable = tps6507x_pmic_disable,
397 .get_voltage_sel = tps6507x_pmic_get_voltage_sel,
398 .set_voltage_sel = tps6507x_pmic_set_voltage_sel,
399 .list_voltage = tps6507x_pmic_list_voltage,
400};
401
402static __devinit int tps6507x_pmic_probe(struct platform_device *pdev)
403{
404 struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
405 struct tps_info *info = &tps6507x_pmic_regs[0];
406 struct regulator_config config = { };
407 struct regulator_init_data *init_data;
408 struct regulator_dev *rdev;
409 struct tps6507x_pmic *tps;
410 struct tps6507x_board *tps_board;
411 int i;
412 int error;
413
414 /**
415 * tps_board points to pmic related constants
416 * coming from the board-evm file.
417 */
418
419 tps_board = dev_get_platdata(tps6507x_dev->dev);
420 if (!tps_board)
421 return -EINVAL;
422
423 /**
424 * init_data points to array of regulator_init structures
425 * coming from the board-evm file.
426 */
427 init_data = tps_board->tps6507x_pmic_init_data;
428 if (!init_data)
429 return -EINVAL;
430
431 tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
432 if (!tps)
433 return -ENOMEM;
434
435 mutex_init(&tps->io_lock);
436
437 /* common for all regulators */
438 tps->mfd = tps6507x_dev;
439
440 for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
441 /* Register the regulators */
442 tps->info[i] = info;
443 if (init_data->driver_data) {
444 struct tps6507x_reg_platform_data *data =
445 init_data->driver_data;
446 tps->info[i]->defdcdc_default = data->defdcdc_default;
447 }
448
449 tps->desc[i].name = info->name;
450 tps->desc[i].id = i;
451 tps->desc[i].n_voltages = info->table_len;
452 tps->desc[i].ops = &tps6507x_pmic_ops;
453 tps->desc[i].type = REGULATOR_VOLTAGE;
454 tps->desc[i].owner = THIS_MODULE;
455
456 config.dev = tps6507x_dev->dev;
457 config.init_data = init_data;
458 config.driver_data = tps;
459
460 rdev = regulator_register(&tps->desc[i], &config);
461 if (IS_ERR(rdev)) {
462 dev_err(tps6507x_dev->dev,
463 "failed to register %s regulator\n",
464 pdev->name);
465 error = PTR_ERR(rdev);
466 goto fail;
467 }
468
469 /* Save regulator for cleanup */
470 tps->rdev[i] = rdev;
471 }
472
473 tps6507x_dev->pmic = tps;
474 platform_set_drvdata(pdev, tps6507x_dev);
475
476 return 0;
477
478fail:
479 while (--i >= 0)
480 regulator_unregister(tps->rdev[i]);
481 return error;
482}
483
484static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
485{
486 struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
487 struct tps6507x_pmic *tps = tps6507x_dev->pmic;
488 int i;
489
490 for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
491 regulator_unregister(tps->rdev[i]);
492 return 0;
493}
494
495static struct platform_driver tps6507x_pmic_driver = {
496 .driver = {
497 .name = "tps6507x-pmic",
498 .owner = THIS_MODULE,
499 },
500 .probe = tps6507x_pmic_probe,
501 .remove = __devexit_p(tps6507x_pmic_remove),
502};
503
504static int __init tps6507x_pmic_init(void)
505{
506 return platform_driver_register(&tps6507x_pmic_driver);
507}
508subsys_initcall(tps6507x_pmic_init);
509
510static void __exit tps6507x_pmic_cleanup(void)
511{
512 platform_driver_unregister(&tps6507x_pmic_driver);
513}
514module_exit(tps6507x_pmic_cleanup);
515
516MODULE_AUTHOR("Texas Instruments");
517MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
518MODULE_LICENSE("GPL v2");
519MODULE_ALIAS("platform:tps6507x-pmic");