regulator: tps650xx - build fixes for x86_64
[linux-2.6.git] / drivers / regulator / tps65023-regulator.c
1 /*
2  * tps65023-regulator.c
3  *
4  * Supports TPS65023 Regulator
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/i2c.h>
26 #include <linux/delay.h>
27
28 /* Register definitions */
29 #define TPS65023_REG_VERSION            0
30 #define TPS65023_REG_PGOODZ             1
31 #define TPS65023_REG_MASK               2
32 #define TPS65023_REG_REG_CTRL           3
33 #define TPS65023_REG_CON_CTRL           4
34 #define TPS65023_REG_CON_CTRL2          5
35 #define TPS65023_REG_DEF_CORE           6
36 #define TPS65023_REG_DEFSLEW            7
37 #define TPS65023_REG_LDO_CTRL           8
38
39 /* PGOODZ bitfields */
40 #define TPS65023_PGOODZ_PWRFAILZ        BIT(7)
41 #define TPS65023_PGOODZ_LOWBATTZ        BIT(6)
42 #define TPS65023_PGOODZ_VDCDC1          BIT(5)
43 #define TPS65023_PGOODZ_VDCDC2          BIT(4)
44 #define TPS65023_PGOODZ_VDCDC3          BIT(3)
45 #define TPS65023_PGOODZ_LDO2            BIT(2)
46 #define TPS65023_PGOODZ_LDO1            BIT(1)
47
48 /* MASK bitfields */
49 #define TPS65023_MASK_PWRFAILZ          BIT(7)
50 #define TPS65023_MASK_LOWBATTZ          BIT(6)
51 #define TPS65023_MASK_VDCDC1            BIT(5)
52 #define TPS65023_MASK_VDCDC2            BIT(4)
53 #define TPS65023_MASK_VDCDC3            BIT(3)
54 #define TPS65023_MASK_LDO2              BIT(2)
55 #define TPS65023_MASK_LDO1              BIT(1)
56
57 /* REG_CTRL bitfields */
58 #define TPS65023_REG_CTRL_VDCDC1_EN     BIT(5)
59 #define TPS65023_REG_CTRL_VDCDC2_EN     BIT(4)
60 #define TPS65023_REG_CTRL_VDCDC3_EN     BIT(3)
61 #define TPS65023_REG_CTRL_LDO2_EN       BIT(2)
62 #define TPS65023_REG_CTRL_LDO1_EN       BIT(1)
63
64 /* LDO_CTRL bitfields */
65 #define TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_id)    ((ldo_id)*4)
66 #define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id)     (0xF0 >> ((ldo_id)*4))
67
68 /* Number of step-down converters available */
69 #define TPS65023_NUM_DCDC               3
70 /* Number of LDO voltage regulators  available */
71 #define TPS65023_NUM_LDO                2
72 /* Number of total regulators available */
73 #define TPS65023_NUM_REGULATOR  (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
74
75 /* DCDCs */
76 #define TPS65023_DCDC_1                 0
77 #define TPS65023_DCDC_2                 1
78 #define TPS65023_DCDC_3                 2
79 /* LDOs */
80 #define TPS65023_LDO_1                  3
81 #define TPS65023_LDO_2                  4
82
83 #define TPS65023_MAX_REG_ID             TPS65023_LDO_2
84
85 /* Supported voltage values for regulators */
86 static const u16 VDCDC1_VSEL_table[] = {
87         800, 825, 850, 875,
88         900, 925, 950, 975,
89         1000, 1025, 1050, 1075,
90         1100, 1125, 1150, 1175,
91         1200, 1225, 1250, 1275,
92         1300, 1325, 1350, 1375,
93         1400, 1425, 1450, 1475,
94         1500, 1525, 1550, 1600,
95 };
96
97 static const u16 LDO1_VSEL_table[] = {
98         1000, 1100, 1300, 1800,
99         2200, 2600, 2800, 3150,
100 };
101
102 static const u16 LDO2_VSEL_table[] = {
103         1050, 1200, 1300, 1800,
104         2500, 2800, 3000, 3300,
105 };
106
107 static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDC1_VSEL_table),
108                                 0, 0, ARRAY_SIZE(LDO1_VSEL_table),
109                                 ARRAY_SIZE(LDO2_VSEL_table)};
110
111 /* Regulator specific details */
112 struct tps_info {
113         const char *name;
114         unsigned min_uV;
115         unsigned max_uV;
116         bool fixed;
117         u8 table_len;
118         const u16 *table;
119 };
120
121 /* PMIC details */
122 struct tps_pmic {
123         struct regulator_desc desc[TPS65023_NUM_REGULATOR];
124         struct i2c_client *client;
125         struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
126         const struct tps_info *info[TPS65023_NUM_REGULATOR];
127         struct mutex io_lock;
128 };
129
130 static inline int tps_65023_read(struct tps_pmic *tps, u8 reg)
131 {
132         return i2c_smbus_read_byte_data(tps->client, reg);
133 }
134
135 static inline int tps_65023_write(struct tps_pmic *tps, u8 reg, u8 val)
136 {
137         return i2c_smbus_write_byte_data(tps->client, reg, val);
138 }
139
140 static int tps_65023_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
141 {
142         int err, data;
143
144         mutex_lock(&tps->io_lock);
145
146         data = tps_65023_read(tps, reg);
147         if (data < 0) {
148                 dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
149                 err = data;
150                 goto out;
151         }
152
153         data |= mask;
154         err = tps_65023_write(tps, reg, data);
155         if (err)
156                 dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
157
158 out:
159         mutex_unlock(&tps->io_lock);
160         return err;
161 }
162
163 static int tps_65023_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
164 {
165         int err, data;
166
167         mutex_lock(&tps->io_lock);
168
169         data = tps_65023_read(tps, reg);
170         if (data < 0) {
171                 dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
172                 err = data;
173                 goto out;
174         }
175
176         data &= ~mask;
177
178         err = tps_65023_write(tps, reg, data);
179         if (err)
180                 dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
181
182 out:
183         mutex_unlock(&tps->io_lock);
184         return err;
185
186 }
187
188 static int tps_65023_reg_read(struct tps_pmic *tps, u8 reg)
189 {
190         int data;
191
192         mutex_lock(&tps->io_lock);
193
194         data = tps_65023_read(tps, reg);
195         if (data < 0)
196                 dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
197
198         mutex_unlock(&tps->io_lock);
199         return data;
200 }
201
202 static int tps_65023_reg_write(struct tps_pmic *tps, u8 reg, u8 val)
203 {
204         int err;
205
206         mutex_lock(&tps->io_lock);
207
208         err = tps_65023_write(tps, reg, val);
209         if (err < 0)
210                 dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
211
212         mutex_unlock(&tps->io_lock);
213         return err;
214 }
215
216 static int tps65023_dcdc_is_enabled(struct regulator_dev *dev)
217 {
218         struct tps_pmic *tps = rdev_get_drvdata(dev);
219         int data, dcdc = rdev_get_id(dev);
220         u8 shift;
221
222         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
223                 return -EINVAL;
224
225         shift = TPS65023_NUM_REGULATOR - dcdc;
226         data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL);
227
228         if (data < 0)
229                 return data;
230         else
231                 return (data & 1<<shift) ? 1 : 0;
232 }
233
234 static int tps65023_ldo_is_enabled(struct regulator_dev *dev)
235 {
236         struct tps_pmic *tps = rdev_get_drvdata(dev);
237         int data, ldo = rdev_get_id(dev);
238         u8 shift;
239
240         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
241                 return -EINVAL;
242
243         shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
244         data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL);
245
246         if (data < 0)
247                 return data;
248         else
249                 return (data & 1<<shift) ? 1 : 0;
250 }
251
252 static int tps65023_dcdc_enable(struct regulator_dev *dev)
253 {
254         struct tps_pmic *tps = rdev_get_drvdata(dev);
255         int dcdc = rdev_get_id(dev);
256         u8 shift;
257
258         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
259                 return -EINVAL;
260
261         shift = TPS65023_NUM_REGULATOR - dcdc;
262         return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
263 }
264
265 static int tps65023_dcdc_disable(struct regulator_dev *dev)
266 {
267         struct tps_pmic *tps = rdev_get_drvdata(dev);
268         int dcdc = rdev_get_id(dev);
269         u8 shift;
270
271         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
272                 return -EINVAL;
273
274         shift = TPS65023_NUM_REGULATOR - dcdc;
275         return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
276 }
277
278 static int tps65023_ldo_enable(struct regulator_dev *dev)
279 {
280         struct tps_pmic *tps = rdev_get_drvdata(dev);
281         int ldo = rdev_get_id(dev);
282         u8 shift;
283
284         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
285                 return -EINVAL;
286
287         shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
288         return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
289 }
290
291 static int tps65023_ldo_disable(struct regulator_dev *dev)
292 {
293         struct tps_pmic *tps = rdev_get_drvdata(dev);
294         int ldo = rdev_get_id(dev);
295         u8 shift;
296
297         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
298                 return -EINVAL;
299
300         shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
301         return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
302 }
303
304 static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
305 {
306         struct tps_pmic *tps = rdev_get_drvdata(dev);
307         int data, dcdc = rdev_get_id(dev);
308
309         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
310                 return -EINVAL;
311
312         if (dcdc == TPS65023_DCDC_1) {
313                 data = tps_65023_reg_read(tps, TPS65023_REG_DEF_CORE);
314                 if (data < 0)
315                         return data;
316                 data &= (tps->info[dcdc]->table_len - 1);
317                 return tps->info[dcdc]->table[data] * 1000;
318         } else
319                 return tps->info[dcdc]->min_uV;
320 }
321
322 static int tps65023_dcdc_set_voltage(struct regulator_dev *dev,
323                                 int min_uV, int max_uV)
324 {
325         struct tps_pmic *tps = rdev_get_drvdata(dev);
326         int dcdc = rdev_get_id(dev);
327         int vsel;
328
329         if (dcdc != TPS65023_DCDC_1)
330                 return -EINVAL;
331
332         if (min_uV < tps->info[dcdc]->min_uV
333                         || min_uV > tps->info[dcdc]->max_uV)
334                 return -EINVAL;
335         if (max_uV < tps->info[dcdc]->min_uV
336                         || max_uV > tps->info[dcdc]->max_uV)
337                 return -EINVAL;
338
339         for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
340                 int mV = tps->info[dcdc]->table[vsel];
341                 int uV = mV * 1000;
342
343                 /* Break at the first in-range value */
344                 if (min_uV <= uV && uV <= max_uV)
345                         break;
346         }
347
348         /* write to the register in case we found a match */
349         if (vsel == tps->info[dcdc]->table_len)
350                 return -EINVAL;
351         else
352                 return tps_65023_reg_write(tps, TPS65023_REG_DEF_CORE, vsel);
353 }
354
355 static int tps65023_ldo_get_voltage(struct regulator_dev *dev)
356 {
357         struct tps_pmic *tps = rdev_get_drvdata(dev);
358         int data, ldo = rdev_get_id(dev);
359
360         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
361                 return -EINVAL;
362
363         data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL);
364         if (data < 0)
365                 return data;
366
367         data >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1));
368         data &= (tps->info[ldo]->table_len - 1);
369         return tps->info[ldo]->table[data] * 1000;
370 }
371
372 static int tps65023_ldo_set_voltage(struct regulator_dev *dev,
373                                 int min_uV, int max_uV)
374 {
375         struct tps_pmic *tps = rdev_get_drvdata(dev);
376         int data, vsel, ldo = rdev_get_id(dev);
377
378         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
379                 return -EINVAL;
380
381         if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
382                 return -EINVAL;
383         if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
384                 return -EINVAL;
385
386         for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
387                 int mV = tps->info[ldo]->table[vsel];
388                 int uV = mV * 1000;
389
390                 /* Break at the first in-range value */
391                 if (min_uV <= uV && uV <= max_uV)
392                         break;
393         }
394
395         if (vsel == tps->info[ldo]->table_len)
396                 return -EINVAL;
397
398         data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL);
399         if (data < 0)
400                 return data;
401
402         data &= TPS65023_LDO_CTRL_LDOx_MASK(ldo - TPS65023_LDO_1);
403         data |= (vsel << (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1)));
404         return tps_65023_reg_write(tps, TPS65023_REG_LDO_CTRL, data);
405 }
406
407 static int tps65023_dcdc_list_voltage(struct regulator_dev *dev,
408                                         unsigned selector)
409 {
410         struct tps_pmic *tps = rdev_get_drvdata(dev);
411         int dcdc = rdev_get_id(dev);
412
413         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
414                 return -EINVAL;
415
416         if (dcdc == TPS65023_DCDC_1) {
417                 if (selector >= tps->info[dcdc]->table_len)
418                         return -EINVAL;
419                 else
420                         return tps->info[dcdc]->table[selector] * 1000;
421         } else
422                 return tps->info[dcdc]->min_uV;
423 }
424
425 static int tps65023_ldo_list_voltage(struct regulator_dev *dev,
426                                         unsigned selector)
427 {
428         struct tps_pmic *tps = rdev_get_drvdata(dev);
429         int ldo = rdev_get_id(dev);
430
431         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
432                 return -EINVAL;
433
434         if (selector >= tps->info[ldo]->table_len)
435                 return -EINVAL;
436         else
437                 return tps->info[ldo]->table[selector] * 1000;
438 }
439
440 /* Operations permitted on VDCDCx */
441 static struct regulator_ops tps65023_dcdc_ops = {
442         .is_enabled = tps65023_dcdc_is_enabled,
443         .enable = tps65023_dcdc_enable,
444         .disable = tps65023_dcdc_disable,
445         .get_voltage = tps65023_dcdc_get_voltage,
446         .set_voltage = tps65023_dcdc_set_voltage,
447         .list_voltage = tps65023_dcdc_list_voltage,
448 };
449
450 /* Operations permitted on LDOx */
451 static struct regulator_ops tps65023_ldo_ops = {
452         .is_enabled = tps65023_ldo_is_enabled,
453         .enable = tps65023_ldo_enable,
454         .disable = tps65023_ldo_disable,
455         .get_voltage = tps65023_ldo_get_voltage,
456         .set_voltage = tps65023_ldo_set_voltage,
457         .list_voltage = tps65023_ldo_list_voltage,
458 };
459
460 static
461 int tps_65023_probe(struct i2c_client *client, const struct i2c_device_id *id)
462 {
463         static int desc_id;
464         const struct tps_info *info = (void *)id->driver_data;
465         struct regulator_init_data *init_data;
466         struct regulator_dev *rdev;
467         struct tps_pmic *tps;
468         int i;
469
470         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
471                 return -EIO;
472
473         /**
474          * init_data points to array of regulator_init structures
475          * coming from the board-evm file.
476          */
477         init_data = client->dev.platform_data;
478
479         if (!init_data)
480                 return -EIO;
481
482         tps = kzalloc(sizeof(*tps), GFP_KERNEL);
483         if (!tps)
484                 return -ENOMEM;
485
486         mutex_init(&tps->io_lock);
487
488         /* common for all regulators */
489         tps->client = client;
490
491         for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
492                 /* Store regulator specific information */
493                 tps->info[i] = info;
494
495                 tps->desc[i].name = info->name;
496                 tps->desc[i].id = desc_id++;
497                 tps->desc[i].n_voltages = num_voltages[i];
498                 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
499                                         &tps65023_ldo_ops : &tps65023_dcdc_ops);
500                 tps->desc[i].type = REGULATOR_VOLTAGE;
501                 tps->desc[i].owner = THIS_MODULE;
502
503                 /* Register the regulators */
504                 rdev = regulator_register(&tps->desc[i], &client->dev,
505                                                                 init_data, tps);
506                 if (IS_ERR(rdev)) {
507                         dev_err(&client->dev, "failed to register %s\n",
508                                 id->name);
509
510                         /* Unregister */
511                         while (i)
512                                 regulator_unregister(tps->rdev[--i]);
513
514                         tps->client = NULL;
515
516                         /* clear the client data in i2c */
517                         i2c_set_clientdata(client, NULL);
518                         kfree(tps);
519                         return PTR_ERR(rdev);
520                 }
521
522                 /* Save regulator for cleanup */
523                 tps->rdev[i] = rdev;
524         }
525
526         i2c_set_clientdata(client, tps);
527
528         return 0;
529 }
530
531 /**
532  * tps_65023_remove - TPS65023 driver i2c remove handler
533  * @client: i2c driver client device structure
534  *
535  * Unregister TPS driver as an i2c client device driver
536  */
537 static int __devexit tps_65023_remove(struct i2c_client *client)
538 {
539         struct tps_pmic *tps = i2c_get_clientdata(client);
540         int i;
541
542         for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
543                 regulator_unregister(tps->rdev[i]);
544
545         tps->client = NULL;
546
547         /* clear the client data in i2c */
548         i2c_set_clientdata(client, NULL);
549         kfree(tps);
550
551         return 0;
552 }
553
554 static const struct tps_info tps65023_regs[] = {
555         {
556                 .name = "VDCDC1",
557                 .min_uV =  800000,
558                 .max_uV = 1600000,
559                 .table_len = ARRAY_SIZE(VDCDC1_VSEL_table),
560                 .table = VDCDC1_VSEL_table,
561         },
562         {
563                 .name = "VDCDC2",
564                 .min_uV =  3300000,
565                 .max_uV = 3300000,
566                 .fixed = 1,
567         },
568         {
569                 .name = "VDCDC3",
570                 .min_uV =  1800000,
571                 .max_uV = 1800000,
572                 .fixed = 1,
573         },
574         {
575                 .name = "LDO1",
576                 .min_uV = 1000000,
577                 .max_uV = 3150000,
578                 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
579                 .table = LDO1_VSEL_table,
580         },
581         {
582                 .name = "LDO2",
583                 .min_uV = 1050000,
584                 .max_uV = 3300000,
585                 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
586                 .table = LDO2_VSEL_table,
587         },
588 };
589
590 static const struct i2c_device_id tps_65023_id[] = {
591         {.name = "tps65023",
592         .driver_data = (unsigned long) tps65023_regs,},
593         { },
594 };
595
596 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
597
598 static struct i2c_driver tps_65023_i2c_driver = {
599         .driver = {
600                 .name = "tps65023",
601                 .owner = THIS_MODULE,
602         },
603         .probe = tps_65023_probe,
604         .remove = __devexit_p(tps_65023_remove),
605         .id_table = tps_65023_id,
606 };
607
608 /**
609  * tps_65023_init
610  *
611  * Module init function
612  */
613 static int __init tps_65023_init(void)
614 {
615         return i2c_add_driver(&tps_65023_i2c_driver);
616 }
617 subsys_initcall(tps_65023_init);
618
619 /**
620  * tps_65023_cleanup
621  *
622  * Module exit function
623  */
624 static void __exit tps_65023_cleanup(void)
625 {
626         i2c_del_driver(&tps_65023_i2c_driver);
627 }
628 module_exit(tps_65023_cleanup);
629
630 MODULE_AUTHOR("Texas Instruments");
631 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
632 MODULE_LICENSE("GPL v2");