Merge remote-tracking branch 'regulator/topic/change' into regulator-next
[linux-3.10.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/slab.h>
27 #include <linux/regmap.h>
28
29 /* Register definitions */
30 #define TPS65023_REG_VERSION            0
31 #define TPS65023_REG_PGOODZ             1
32 #define TPS65023_REG_MASK               2
33 #define TPS65023_REG_REG_CTRL           3
34 #define TPS65023_REG_CON_CTRL           4
35 #define TPS65023_REG_CON_CTRL2          5
36 #define TPS65023_REG_DEF_CORE           6
37 #define TPS65023_REG_DEFSLEW            7
38 #define TPS65023_REG_LDO_CTRL           8
39
40 /* PGOODZ bitfields */
41 #define TPS65023_PGOODZ_PWRFAILZ        BIT(7)
42 #define TPS65023_PGOODZ_LOWBATTZ        BIT(6)
43 #define TPS65023_PGOODZ_VDCDC1          BIT(5)
44 #define TPS65023_PGOODZ_VDCDC2          BIT(4)
45 #define TPS65023_PGOODZ_VDCDC3          BIT(3)
46 #define TPS65023_PGOODZ_LDO2            BIT(2)
47 #define TPS65023_PGOODZ_LDO1            BIT(1)
48
49 /* MASK bitfields */
50 #define TPS65023_MASK_PWRFAILZ          BIT(7)
51 #define TPS65023_MASK_LOWBATTZ          BIT(6)
52 #define TPS65023_MASK_VDCDC1            BIT(5)
53 #define TPS65023_MASK_VDCDC2            BIT(4)
54 #define TPS65023_MASK_VDCDC3            BIT(3)
55 #define TPS65023_MASK_LDO2              BIT(2)
56 #define TPS65023_MASK_LDO1              BIT(1)
57
58 /* REG_CTRL bitfields */
59 #define TPS65023_REG_CTRL_VDCDC1_EN     BIT(5)
60 #define TPS65023_REG_CTRL_VDCDC2_EN     BIT(4)
61 #define TPS65023_REG_CTRL_VDCDC3_EN     BIT(3)
62 #define TPS65023_REG_CTRL_LDO2_EN       BIT(2)
63 #define TPS65023_REG_CTRL_LDO1_EN       BIT(1)
64
65 /* REG_CTRL2 bitfields */
66 #define TPS65023_REG_CTRL2_GO           BIT(7)
67 #define TPS65023_REG_CTRL2_CORE_ADJ     BIT(6)
68 #define TPS65023_REG_CTRL2_DCDC2        BIT(2)
69 #define TPS65023_REG_CTRL2_DCDC1        BIT(1)
70 #define TPS65023_REG_CTRL2_DCDC3        BIT(0)
71
72 /* Number of step-down converters available */
73 #define TPS65023_NUM_DCDC               3
74 /* Number of LDO voltage regulators  available */
75 #define TPS65023_NUM_LDO                2
76 /* Number of total regulators available */
77 #define TPS65023_NUM_REGULATOR  (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
78
79 /* DCDCs */
80 #define TPS65023_DCDC_1                 0
81 #define TPS65023_DCDC_2                 1
82 #define TPS65023_DCDC_3                 2
83 /* LDOs */
84 #define TPS65023_LDO_1                  3
85 #define TPS65023_LDO_2                  4
86
87 #define TPS65023_MAX_REG_ID             TPS65023_LDO_2
88
89 /* Supported voltage values for regulators */
90 static const unsigned int VCORE_VSEL_table[] = {
91         800000, 825000, 850000, 875000,
92         900000, 925000, 950000, 975000,
93         1000000, 1025000, 1050000, 1075000,
94         1100000, 1125000, 1150000, 1175000,
95         1200000, 1225000, 1250000, 1275000,
96         1300000, 1325000, 1350000, 1375000,
97         1400000, 1425000, 1450000, 1475000,
98         1500000, 1525000, 1550000, 1600000,
99 };
100
101 static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
102         3300000,
103 };
104
105 static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
106         1800000,
107 };
108
109 /* Supported voltage values for LDO regulators for tps65020 */
110 static const unsigned int TPS65020_LDO1_VSEL_table[] = {
111         1000000, 1050000, 1100000, 1300000,
112         1800000, 2500000, 3000000, 3300000,
113 };
114
115 static const unsigned int TPS65020_LDO2_VSEL_table[] = {
116         1000000, 1050000, 1100000, 1300000,
117         1800000, 2500000, 3000000, 3300000,
118 };
119
120 /* Supported voltage values for LDO regulators
121  * for tps65021 and tps65023 */
122 static const unsigned int TPS65023_LDO1_VSEL_table[] = {
123         1000000, 1100000, 1300000, 1800000,
124         2200000, 2600000, 2800000, 3150000,
125 };
126
127 static const unsigned int TPS65023_LDO2_VSEL_table[] = {
128         1050000, 1200000, 1300000, 1800000,
129         2500000, 2800000, 3000000, 3300000,
130 };
131
132 /* Regulator specific details */
133 struct tps_info {
134         const char *name;
135         u8 table_len;
136         const unsigned int *table;
137 };
138
139 /* PMIC details */
140 struct tps_pmic {
141         struct regulator_desc desc[TPS65023_NUM_REGULATOR];
142         struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
143         const struct tps_info *info[TPS65023_NUM_REGULATOR];
144         struct regmap *regmap;
145         u8 core_regulator;
146 };
147
148 /* Struct passed as driver data */
149 struct tps_driver_data {
150         const struct tps_info *info;
151         u8 core_regulator;
152 };
153
154 static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
155 {
156         struct tps_pmic *tps = rdev_get_drvdata(dev);
157         int ret;
158         int data, dcdc = rdev_get_id(dev);
159
160         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
161                 return -EINVAL;
162
163         if (dcdc == tps->core_regulator) {
164                 ret = regmap_read(tps->regmap, TPS65023_REG_DEF_CORE, &data);
165                 if (ret != 0)
166                         return ret;
167                 data &= (tps->info[dcdc]->table_len - 1);
168                 return data;
169         } else
170                 return 0;
171 }
172
173 static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
174                                          unsigned selector)
175 {
176         struct tps_pmic *tps = rdev_get_drvdata(dev);
177         int dcdc = rdev_get_id(dev);
178         int ret;
179
180         if (dcdc != tps->core_regulator)
181                 return -EINVAL;
182
183         ret = regmap_write(tps->regmap, TPS65023_REG_DEF_CORE, selector);
184         if (ret)
185                 goto out;
186
187         /* Tell the chip that we have changed the value in DEFCORE
188          * and its time to update the core voltage
189          */
190         ret = regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
191                                  TPS65023_REG_CTRL2_GO, TPS65023_REG_CTRL2_GO);
192
193 out:
194         return ret;
195 }
196
197 /* Operations permitted on VDCDCx */
198 static struct regulator_ops tps65023_dcdc_ops = {
199         .is_enabled = regulator_is_enabled_regmap,
200         .enable = regulator_enable_regmap,
201         .disable = regulator_disable_regmap,
202         .get_voltage_sel = tps65023_dcdc_get_voltage_sel,
203         .set_voltage_sel = tps65023_dcdc_set_voltage_sel,
204         .list_voltage = regulator_list_voltage_table,
205 };
206
207 /* Operations permitted on LDOx */
208 static struct regulator_ops tps65023_ldo_ops = {
209         .is_enabled = regulator_is_enabled_regmap,
210         .enable = regulator_enable_regmap,
211         .disable = regulator_disable_regmap,
212         .get_voltage_sel = regulator_get_voltage_sel_regmap,
213         .set_voltage_sel = regulator_set_voltage_sel_regmap,
214         .list_voltage = regulator_list_voltage_table,
215 };
216
217 static struct regmap_config tps65023_regmap_config = {
218         .reg_bits = 8,
219         .val_bits = 8,
220 };
221
222 static int __devinit tps_65023_probe(struct i2c_client *client,
223                                      const struct i2c_device_id *id)
224 {
225         const struct tps_driver_data *drv_data = (void *)id->driver_data;
226         const struct tps_info *info = drv_data->info;
227         struct regulator_config config = { };
228         struct regulator_init_data *init_data;
229         struct regulator_dev *rdev;
230         struct tps_pmic *tps;
231         int i;
232         int error;
233
234         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
235                 return -EIO;
236
237         /**
238          * init_data points to array of regulator_init structures
239          * coming from the board-evm file.
240          */
241         init_data = client->dev.platform_data;
242         if (!init_data)
243                 return -EIO;
244
245         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
246         if (!tps)
247                 return -ENOMEM;
248
249         tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
250         if (IS_ERR(tps->regmap)) {
251                 error = PTR_ERR(tps->regmap);
252                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
253                         error);
254                 return error;
255         }
256
257         /* common for all regulators */
258         tps->core_regulator = drv_data->core_regulator;
259
260         for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
261                 /* Store regulator specific information */
262                 tps->info[i] = info;
263
264                 tps->desc[i].name = info->name;
265                 tps->desc[i].id = i;
266                 tps->desc[i].n_voltages = info->table_len;
267                 tps->desc[i].volt_table = info->table;
268                 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
269                                         &tps65023_ldo_ops : &tps65023_dcdc_ops);
270                 tps->desc[i].type = REGULATOR_VOLTAGE;
271                 tps->desc[i].owner = THIS_MODULE;
272
273                 tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
274                 switch (i) {
275                 case TPS65023_LDO_1:
276                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
277                         tps->desc[i].vsel_mask = 0x07;
278                         tps->desc[i].enable_mask = 1 << 1;
279                         break;
280                 case TPS65023_LDO_2:
281                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
282                         tps->desc[i].vsel_mask = 0x70;
283                         tps->desc[i].enable_mask = 1 << 2;
284                         break;
285                 default: /* DCDCx */
286                         tps->desc[i].enable_mask =
287                                         1 << (TPS65023_NUM_REGULATOR - i);
288                 }
289
290                 config.dev = &client->dev;
291                 config.init_data = init_data;
292                 config.driver_data = tps;
293                 config.regmap = tps->regmap;
294
295                 /* Register the regulators */
296                 rdev = regulator_register(&tps->desc[i], &config);
297                 if (IS_ERR(rdev)) {
298                         dev_err(&client->dev, "failed to register %s\n",
299                                 id->name);
300                         error = PTR_ERR(rdev);
301                         goto fail;
302                 }
303
304                 /* Save regulator for cleanup */
305                 tps->rdev[i] = rdev;
306         }
307
308         i2c_set_clientdata(client, tps);
309
310         /* Enable setting output voltage by I2C */
311         regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
312                         TPS65023_REG_CTRL2_CORE_ADJ, TPS65023_REG_CTRL2_CORE_ADJ);
313
314         return 0;
315
316  fail:
317         while (--i >= 0)
318                 regulator_unregister(tps->rdev[i]);
319         return error;
320 }
321
322 static int __devexit tps_65023_remove(struct i2c_client *client)
323 {
324         struct tps_pmic *tps = i2c_get_clientdata(client);
325         int i;
326
327         for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
328                 regulator_unregister(tps->rdev[i]);
329         return 0;
330 }
331
332 static const struct tps_info tps65020_regs[] = {
333         {
334                 .name = "VDCDC1",
335                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
336                 .table = DCDC_FIXED_3300000_VSEL_table,
337         },
338         {
339                 .name = "VDCDC2",
340                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
341                 .table = DCDC_FIXED_1800000_VSEL_table,
342         },
343         {
344                 .name = "VDCDC3",
345                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
346                 .table = VCORE_VSEL_table,
347         },
348         {
349                 .name = "LDO1",
350                 .table_len = ARRAY_SIZE(TPS65020_LDO1_VSEL_table),
351                 .table = TPS65020_LDO1_VSEL_table,
352         },
353         {
354                 .name = "LDO2",
355                 .table_len = ARRAY_SIZE(TPS65020_LDO2_VSEL_table),
356                 .table = TPS65020_LDO2_VSEL_table,
357         },
358 };
359
360 static const struct tps_info tps65021_regs[] = {
361         {
362                 .name = "VDCDC1",
363                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
364                 .table = DCDC_FIXED_3300000_VSEL_table,
365         },
366         {
367                 .name = "VDCDC2",
368                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
369                 .table = DCDC_FIXED_1800000_VSEL_table,
370         },
371         {
372                 .name = "VDCDC3",
373                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
374                 .table = VCORE_VSEL_table,
375         },
376         {
377                 .name = "LDO1",
378                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
379                 .table = TPS65023_LDO1_VSEL_table,
380         },
381         {
382                 .name = "LDO2",
383                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
384                 .table = TPS65023_LDO2_VSEL_table,
385         },
386 };
387
388 static const struct tps_info tps65023_regs[] = {
389         {
390                 .name = "VDCDC1",
391                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
392                 .table = VCORE_VSEL_table,
393         },
394         {
395                 .name = "VDCDC2",
396                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
397                 .table = DCDC_FIXED_3300000_VSEL_table,
398         },
399         {
400                 .name = "VDCDC3",
401                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
402                 .table = DCDC_FIXED_1800000_VSEL_table,
403         },
404         {
405                 .name = "LDO1",
406                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
407                 .table = TPS65023_LDO1_VSEL_table,
408         },
409         {
410                 .name = "LDO2",
411                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
412                 .table = TPS65023_LDO2_VSEL_table,
413         },
414 };
415
416 static struct tps_driver_data tps65020_drv_data = {
417         .info = tps65020_regs,
418         .core_regulator = TPS65023_DCDC_3,
419 };
420
421 static struct tps_driver_data tps65021_drv_data = {
422         .info = tps65021_regs,
423         .core_regulator = TPS65023_DCDC_3,
424 };
425
426 static struct tps_driver_data tps65023_drv_data = {
427         .info = tps65023_regs,
428         .core_regulator = TPS65023_DCDC_1,
429 };
430
431 static const struct i2c_device_id tps_65023_id[] = {
432         {.name = "tps65023",
433         .driver_data = (unsigned long) &tps65023_drv_data},
434         {.name = "tps65021",
435         .driver_data = (unsigned long) &tps65021_drv_data,},
436         {.name = "tps65020",
437         .driver_data = (unsigned long) &tps65020_drv_data},
438         { },
439 };
440
441 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
442
443 static struct i2c_driver tps_65023_i2c_driver = {
444         .driver = {
445                 .name = "tps65023",
446                 .owner = THIS_MODULE,
447         },
448         .probe = tps_65023_probe,
449         .remove = __devexit_p(tps_65023_remove),
450         .id_table = tps_65023_id,
451 };
452
453 static int __init tps_65023_init(void)
454 {
455         return i2c_add_driver(&tps_65023_i2c_driver);
456 }
457 subsys_initcall(tps_65023_init);
458
459 static void __exit tps_65023_cleanup(void)
460 {
461         i2c_del_driver(&tps_65023_i2c_driver);
462 }
463 module_exit(tps_65023_cleanup);
464
465 MODULE_AUTHOR("Texas Instruments");
466 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
467 MODULE_LICENSE("GPL v2");