arch: arm: regulator: Fix LDK kernel build break
[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 #include <linux/slab.h>
28 #include <linux/regmap.h>
29
30 /* Register definitions */
31 #define TPS65023_REG_VERSION            0
32 #define TPS65023_REG_PGOODZ             1
33 #define TPS65023_REG_MASK               2
34 #define TPS65023_REG_REG_CTRL           3
35 #define TPS65023_REG_CON_CTRL           4
36 #define TPS65023_REG_CON_CTRL2          5
37 #define TPS65023_REG_DEF_CORE           6
38 #define TPS65023_REG_DEFSLEW            7
39 #define TPS65023_REG_LDO_CTRL           8
40
41 /* PGOODZ bitfields */
42 #define TPS65023_PGOODZ_PWRFAILZ        BIT(7)
43 #define TPS65023_PGOODZ_LOWBATTZ        BIT(6)
44 #define TPS65023_PGOODZ_VDCDC1          BIT(5)
45 #define TPS65023_PGOODZ_VDCDC2          BIT(4)
46 #define TPS65023_PGOODZ_VDCDC3          BIT(3)
47 #define TPS65023_PGOODZ_LDO2            BIT(2)
48 #define TPS65023_PGOODZ_LDO1            BIT(1)
49
50 /* MASK bitfields */
51 #define TPS65023_MASK_PWRFAILZ          BIT(7)
52 #define TPS65023_MASK_LOWBATTZ          BIT(6)
53 #define TPS65023_MASK_VDCDC1            BIT(5)
54 #define TPS65023_MASK_VDCDC2            BIT(4)
55 #define TPS65023_MASK_VDCDC3            BIT(3)
56 #define TPS65023_MASK_LDO2              BIT(2)
57 #define TPS65023_MASK_LDO1              BIT(1)
58
59 /* REG_CTRL bitfields */
60 #define TPS65023_REG_CTRL_VDCDC1_EN     BIT(5)
61 #define TPS65023_REG_CTRL_VDCDC2_EN     BIT(4)
62 #define TPS65023_REG_CTRL_VDCDC3_EN     BIT(3)
63 #define TPS65023_REG_CTRL_LDO2_EN       BIT(2)
64 #define TPS65023_REG_CTRL_LDO1_EN       BIT(1)
65
66 /* LDO_CTRL bitfields */
67 #define TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_id)    ((ldo_id)*4)
68 #define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id)     (0xF0 >> ((ldo_id)*4))
69
70 /* Number of step-down converters available */
71 #define TPS65023_NUM_DCDC               3
72 /* Number of LDO voltage regulators  available */
73 #define TPS65023_NUM_LDO                2
74 /* Number of total regulators available */
75 #define TPS65023_NUM_REGULATOR  (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
76
77 /* DCDCs */
78 #define TPS65023_DCDC_1                 0
79 #define TPS65023_DCDC_2                 1
80 #define TPS65023_DCDC_3                 2
81 /* LDOs */
82 #define TPS65023_LDO_1                  3
83 #define TPS65023_LDO_2                  4
84
85 #define TPS65023_MAX_REG_ID             TPS65023_LDO_2
86
87 /* Supported voltage values for regulators */
88 static const u16 VDCDC1_VSEL_table[] = {
89         800, 825, 850, 875,
90         900, 925, 950, 975,
91         1000, 1025, 1050, 1075,
92         1100, 1125, 1150, 1175,
93         1200, 1225, 1250, 1275,
94         1300, 1325, 1350, 1375,
95         1400, 1425, 1450, 1475,
96         1500, 1525, 1550, 1600,
97 };
98
99 static const u16 LDO1_VSEL_table[] = {
100         1000, 1100, 1300, 1800,
101         2200, 2600, 2800, 3150,
102 };
103
104 static const u16 LDO2_VSEL_table[] = {
105         1050, 1200, 1300, 1800,
106         2500, 2800, 3000, 3300,
107 };
108
109 static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDC1_VSEL_table),
110                                 0, 0, ARRAY_SIZE(LDO1_VSEL_table),
111                                 ARRAY_SIZE(LDO2_VSEL_table)};
112
113 /* Regulator specific details */
114 struct tps_info {
115         const char *name;
116         unsigned min_uV;
117         unsigned max_uV;
118         bool fixed;
119         u8 table_len;
120         const u16 *table;
121 };
122
123 /* PMIC details */
124 struct tps_pmic {
125         struct regulator_desc desc[TPS65023_NUM_REGULATOR];
126         struct i2c_client *client;
127         struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
128         const struct tps_info *info[TPS65023_NUM_REGULATOR];
129         struct regmap *regmap;
130 };
131
132 static int tps_65023_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
133 {
134         return regmap_update_bits(tps->regmap, reg, mask, mask);
135 }
136
137 static int tps_65023_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
138 {
139         return regmap_update_bits(tps->regmap, reg, mask, 0);
140 }
141
142 static int tps_65023_reg_read(struct tps_pmic *tps, u8 reg)
143 {
144         unsigned int val;
145         int ret;
146
147         ret = regmap_read(tps->regmap, reg, &val);
148
149         if (ret != 0)
150                 return ret;
151         else
152                 return val;
153 }
154
155 static int tps_65023_reg_write(struct tps_pmic *tps, u8 reg, u8 val)
156 {
157         return regmap_write(tps->regmap, reg, val);
158 }
159
160 static int tps65023_dcdc_is_enabled(struct regulator_dev *dev)
161 {
162         struct tps_pmic *tps = rdev_get_drvdata(dev);
163         int data, dcdc = rdev_get_id(dev);
164         u8 shift;
165
166         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
167                 return -EINVAL;
168
169         shift = TPS65023_NUM_REGULATOR - dcdc;
170         data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL);
171
172         if (data < 0)
173                 return data;
174         else
175                 return (data & 1<<shift) ? 1 : 0;
176 }
177
178 static int tps65023_ldo_is_enabled(struct regulator_dev *dev)
179 {
180         struct tps_pmic *tps = rdev_get_drvdata(dev);
181         int data, ldo = rdev_get_id(dev);
182         u8 shift;
183
184         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
185                 return -EINVAL;
186
187         shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
188         data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL);
189
190         if (data < 0)
191                 return data;
192         else
193                 return (data & 1<<shift) ? 1 : 0;
194 }
195
196 static int tps65023_dcdc_enable(struct regulator_dev *dev)
197 {
198         struct tps_pmic *tps = rdev_get_drvdata(dev);
199         int dcdc = rdev_get_id(dev);
200         u8 shift;
201
202         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
203                 return -EINVAL;
204
205         shift = TPS65023_NUM_REGULATOR - dcdc;
206         return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
207 }
208
209 static int tps65023_dcdc_disable(struct regulator_dev *dev)
210 {
211         struct tps_pmic *tps = rdev_get_drvdata(dev);
212         int dcdc = rdev_get_id(dev);
213         u8 shift;
214
215         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
216                 return -EINVAL;
217
218         shift = TPS65023_NUM_REGULATOR - dcdc;
219         return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
220 }
221
222 static int tps65023_ldo_enable(struct regulator_dev *dev)
223 {
224         struct tps_pmic *tps = rdev_get_drvdata(dev);
225         int ldo = rdev_get_id(dev);
226         u8 shift;
227
228         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
229                 return -EINVAL;
230
231         shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
232         return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
233 }
234
235 static int tps65023_ldo_disable(struct regulator_dev *dev)
236 {
237         struct tps_pmic *tps = rdev_get_drvdata(dev);
238         int ldo = rdev_get_id(dev);
239         u8 shift;
240
241         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
242                 return -EINVAL;
243
244         shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
245         return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
246 }
247
248 static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
249 {
250         struct tps_pmic *tps = rdev_get_drvdata(dev);
251         int data, dcdc = rdev_get_id(dev);
252
253         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
254                 return -EINVAL;
255
256         if (dcdc == TPS65023_DCDC_1) {
257                 data = tps_65023_reg_read(tps, TPS65023_REG_DEF_CORE);
258                 if (data < 0)
259                         return data;
260                 data &= (tps->info[dcdc]->table_len - 1);
261                 return tps->info[dcdc]->table[data] * 1000;
262         } else
263                 return tps->info[dcdc]->min_uV;
264 }
265
266 static int tps65023_dcdc_set_voltage(struct regulator_dev *dev,
267                                      int min_uV, int max_uV,
268                                      unsigned *selector)
269 {
270         struct tps_pmic *tps = rdev_get_drvdata(dev);
271         int dcdc = rdev_get_id(dev);
272         int vsel;
273
274         if (dcdc != TPS65023_DCDC_1)
275                 return -EINVAL;
276
277         if (min_uV < tps->info[dcdc]->min_uV
278                         || min_uV > tps->info[dcdc]->max_uV)
279                 return -EINVAL;
280         if (max_uV < tps->info[dcdc]->min_uV
281                         || max_uV > tps->info[dcdc]->max_uV)
282                 return -EINVAL;
283
284         for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
285                 int mV = tps->info[dcdc]->table[vsel];
286                 int uV = mV * 1000;
287
288                 /* Break at the first in-range value */
289                 if (min_uV <= uV && uV <= max_uV)
290                         break;
291         }
292
293         *selector = vsel;
294
295         /* write to the register in case we found a match */
296         if (vsel == tps->info[dcdc]->table_len)
297                 return -EINVAL;
298         else
299                 return tps_65023_reg_write(tps, TPS65023_REG_DEF_CORE, vsel);
300 }
301
302 static int tps65023_ldo_get_voltage(struct regulator_dev *dev)
303 {
304         struct tps_pmic *tps = rdev_get_drvdata(dev);
305         int data, ldo = rdev_get_id(dev);
306
307         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
308                 return -EINVAL;
309
310         data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL);
311         if (data < 0)
312                 return data;
313
314         data >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1));
315         data &= (tps->info[ldo]->table_len - 1);
316         return tps->info[ldo]->table[data] * 1000;
317 }
318
319 static int tps65023_ldo_set_voltage(struct regulator_dev *dev,
320                                     int min_uV, int max_uV, unsigned *selector)
321 {
322         struct tps_pmic *tps = rdev_get_drvdata(dev);
323         int data, vsel, ldo = rdev_get_id(dev);
324
325         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
326                 return -EINVAL;
327
328         if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
329                 return -EINVAL;
330         if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
331                 return -EINVAL;
332
333         for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
334                 int mV = tps->info[ldo]->table[vsel];
335                 int uV = mV * 1000;
336
337                 /* Break at the first in-range value */
338                 if (min_uV <= uV && uV <= max_uV)
339                         break;
340         }
341
342         if (vsel == tps->info[ldo]->table_len)
343                 return -EINVAL;
344
345         *selector = vsel;
346
347         data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL);
348         if (data < 0)
349                 return data;
350
351         data &= TPS65023_LDO_CTRL_LDOx_MASK(ldo - TPS65023_LDO_1);
352         data |= (vsel << (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1)));
353         return tps_65023_reg_write(tps, TPS65023_REG_LDO_CTRL, data);
354 }
355
356 static int tps65023_dcdc_list_voltage(struct regulator_dev *dev,
357                                         unsigned selector)
358 {
359         struct tps_pmic *tps = rdev_get_drvdata(dev);
360         int dcdc = rdev_get_id(dev);
361
362         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
363                 return -EINVAL;
364
365         if (dcdc == TPS65023_DCDC_1) {
366                 if (selector >= tps->info[dcdc]->table_len)
367                         return -EINVAL;
368                 else
369                         return tps->info[dcdc]->table[selector] * 1000;
370         } else
371                 return tps->info[dcdc]->min_uV;
372 }
373
374 static int tps65023_ldo_list_voltage(struct regulator_dev *dev,
375                                         unsigned selector)
376 {
377         struct tps_pmic *tps = rdev_get_drvdata(dev);
378         int ldo = rdev_get_id(dev);
379
380         if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
381                 return -EINVAL;
382
383         if (selector >= tps->info[ldo]->table_len)
384                 return -EINVAL;
385         else
386                 return tps->info[ldo]->table[selector] * 1000;
387 }
388
389 /* Operations permitted on VDCDCx */
390 static struct regulator_ops tps65023_dcdc_ops = {
391         .is_enabled = tps65023_dcdc_is_enabled,
392         .enable = tps65023_dcdc_enable,
393         .disable = tps65023_dcdc_disable,
394         .get_voltage = tps65023_dcdc_get_voltage,
395         .set_voltage = tps65023_dcdc_set_voltage,
396         .list_voltage = tps65023_dcdc_list_voltage,
397 };
398
399 /* Operations permitted on LDOx */
400 static struct regulator_ops tps65023_ldo_ops = {
401         .is_enabled = tps65023_ldo_is_enabled,
402         .enable = tps65023_ldo_enable,
403         .disable = tps65023_ldo_disable,
404         .get_voltage = tps65023_ldo_get_voltage,
405         .set_voltage = tps65023_ldo_set_voltage,
406         .list_voltage = tps65023_ldo_list_voltage,
407 };
408
409 static struct regmap_config tps65023_regmap_config = {
410         .reg_bits = 8,
411         .val_bits = 8,
412 };
413
414 static int __devinit tps_65023_probe(struct i2c_client *client,
415                                      const struct i2c_device_id *id)
416 {
417         const struct tps_info *info = (void *)id->driver_data;
418         struct regulator_init_data *init_data;
419         struct regulator_dev *rdev;
420         struct tps_pmic *tps;
421         int i;
422         int error;
423
424         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
425                 return -EIO;
426
427         /**
428          * init_data points to array of regulator_init structures
429          * coming from the board-evm file.
430          */
431         init_data = client->dev.platform_data;
432         if (!init_data)
433                 return -EIO;
434
435         tps = kzalloc(sizeof(*tps), GFP_KERNEL);
436         if (!tps)
437                 return -ENOMEM;
438
439         tps->regmap = regmap_init_i2c(client, &tps65023_regmap_config);
440         if (IS_ERR(tps->regmap)) {
441                 error = PTR_ERR(tps->regmap);
442                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
443                         error);
444                 goto fail_alloc;
445         }
446
447         /* common for all regulators */
448         tps->client = client;
449
450         for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
451                 /* Store regulator specific information */
452                 tps->info[i] = info;
453
454                 tps->desc[i].name = info->name;
455                 tps->desc[i].id = i;
456                 tps->desc[i].n_voltages = num_voltages[i];
457                 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
458                                         &tps65023_ldo_ops : &tps65023_dcdc_ops);
459                 tps->desc[i].type = REGULATOR_VOLTAGE;
460                 tps->desc[i].owner = THIS_MODULE;
461
462                 /* Register the regulators */
463                 rdev = regulator_register(&tps->desc[i], &client->dev,
464                                           init_data, tps);
465                 if (IS_ERR(rdev)) {
466                         dev_err(&client->dev, "failed to register %s\n",
467                                 id->name);
468                         error = PTR_ERR(rdev);
469                         goto fail;
470                 }
471
472                 /* Save regulator for cleanup */
473                 tps->rdev[i] = rdev;
474         }
475
476         i2c_set_clientdata(client, tps);
477
478         return 0;
479
480  fail:
481         while (--i >= 0)
482                 regulator_unregister(tps->rdev[i]);
483
484         regmap_exit(tps->regmap);
485  fail_alloc:
486         kfree(tps);
487         return error;
488 }
489
490 /**
491  * tps_65023_remove - TPS65023 driver i2c remove handler
492  * @client: i2c driver client device structure
493  *
494  * Unregister TPS driver as an i2c client device driver
495  */
496 static int __devexit tps_65023_remove(struct i2c_client *client)
497 {
498         struct tps_pmic *tps = i2c_get_clientdata(client);
499         int i;
500
501         for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
502                 regulator_unregister(tps->rdev[i]);
503
504         regmap_exit(tps->regmap);
505         kfree(tps);
506
507         return 0;
508 }
509
510 static const struct tps_info tps65023_regs[] = {
511         {
512                 .name = "VDCDC1",
513                 .min_uV =  800000,
514                 .max_uV = 1600000,
515                 .table_len = ARRAY_SIZE(VDCDC1_VSEL_table),
516                 .table = VDCDC1_VSEL_table,
517         },
518         {
519                 .name = "VDCDC2",
520                 .min_uV =  3300000,
521                 .max_uV = 3300000,
522                 .fixed = 1,
523         },
524         {
525                 .name = "VDCDC3",
526                 .min_uV =  1800000,
527                 .max_uV = 1800000,
528                 .fixed = 1,
529         },
530         {
531                 .name = "LDO1",
532                 .min_uV = 1000000,
533                 .max_uV = 3150000,
534                 .table_len = ARRAY_SIZE(LDO1_VSEL_table),
535                 .table = LDO1_VSEL_table,
536         },
537         {
538                 .name = "LDO2",
539                 .min_uV = 1050000,
540                 .max_uV = 3300000,
541                 .table_len = ARRAY_SIZE(LDO2_VSEL_table),
542                 .table = LDO2_VSEL_table,
543         },
544 };
545
546 static const struct i2c_device_id tps_65023_id[] = {
547         {.name = "tps65023",
548         .driver_data = (unsigned long) tps65023_regs,},
549         {.name = "tps65021",
550         .driver_data = (unsigned long) tps65023_regs,},
551         { },
552 };
553
554 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
555
556 static struct i2c_driver tps_65023_i2c_driver = {
557         .driver = {
558                 .name = "tps65023",
559                 .owner = THIS_MODULE,
560         },
561         .probe = tps_65023_probe,
562         .remove = __devexit_p(tps_65023_remove),
563         .id_table = tps_65023_id,
564 };
565
566 /**
567  * tps_65023_init
568  *
569  * Module init function
570  */
571 static int __init tps_65023_init(void)
572 {
573         return i2c_add_driver(&tps_65023_i2c_driver);
574 }
575 subsys_initcall(tps_65023_init);
576
577 /**
578  * tps_65023_cleanup
579  *
580  * Module exit function
581  */
582 static void __exit tps_65023_cleanup(void)
583 {
584         i2c_del_driver(&tps_65023_i2c_driver);
585 }
586 module_exit(tps_65023_cleanup);
587
588 MODULE_AUTHOR("Texas Instruments");
589 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
590 MODULE_LICENSE("GPL v2");