Merge remote-tracking branches 'regulator/fix/da9211', 'regulator/fix/ltc3589' and...
[sfrench/cifs-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/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_LDO_VSEL_table[] = {
111         1000000, 1050000, 1100000, 1300000,
112         1800000, 2500000, 3000000, 3300000,
113 };
114
115 /* Supported voltage values for LDO regulators
116  * for tps65021 and tps65023 */
117 static const unsigned int TPS65023_LDO1_VSEL_table[] = {
118         1000000, 1100000, 1300000, 1800000,
119         2200000, 2600000, 2800000, 3150000,
120 };
121
122 static const unsigned int TPS65023_LDO2_VSEL_table[] = {
123         1050000, 1200000, 1300000, 1800000,
124         2500000, 2800000, 3000000, 3300000,
125 };
126
127 /* Regulator specific details */
128 struct tps_info {
129         const char *name;
130         u8 table_len;
131         const unsigned int *table;
132 };
133
134 /* PMIC details */
135 struct tps_pmic {
136         struct regulator_desc desc[TPS65023_NUM_REGULATOR];
137         struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
138         const struct tps_info *info[TPS65023_NUM_REGULATOR];
139         struct regmap *regmap;
140         u8 core_regulator;
141 };
142
143 /* Struct passed as driver data */
144 struct tps_driver_data {
145         const struct tps_info *info;
146         u8 core_regulator;
147 };
148
149 static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
150 {
151         struct tps_pmic *tps = rdev_get_drvdata(dev);
152         int dcdc = rdev_get_id(dev);
153
154         if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
155                 return -EINVAL;
156
157         if (dcdc != tps->core_regulator)
158                 return 0;
159
160         return regulator_get_voltage_sel_regmap(dev);
161 }
162
163 static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
164                                          unsigned selector)
165 {
166         struct tps_pmic *tps = rdev_get_drvdata(dev);
167         int dcdc = rdev_get_id(dev);
168
169         if (dcdc != tps->core_regulator)
170                 return -EINVAL;
171
172         return regulator_set_voltage_sel_regmap(dev, selector);
173 }
174
175 /* Operations permitted on VDCDCx */
176 static struct regulator_ops tps65023_dcdc_ops = {
177         .is_enabled = regulator_is_enabled_regmap,
178         .enable = regulator_enable_regmap,
179         .disable = regulator_disable_regmap,
180         .get_voltage_sel = tps65023_dcdc_get_voltage_sel,
181         .set_voltage_sel = tps65023_dcdc_set_voltage_sel,
182         .list_voltage = regulator_list_voltage_table,
183         .map_voltage = regulator_map_voltage_ascend,
184 };
185
186 /* Operations permitted on LDOx */
187 static struct regulator_ops tps65023_ldo_ops = {
188         .is_enabled = regulator_is_enabled_regmap,
189         .enable = regulator_enable_regmap,
190         .disable = regulator_disable_regmap,
191         .get_voltage_sel = regulator_get_voltage_sel_regmap,
192         .set_voltage_sel = regulator_set_voltage_sel_regmap,
193         .list_voltage = regulator_list_voltage_table,
194         .map_voltage = regulator_map_voltage_ascend,
195 };
196
197 static struct regmap_config tps65023_regmap_config = {
198         .reg_bits = 8,
199         .val_bits = 8,
200 };
201
202 static int tps_65023_probe(struct i2c_client *client,
203                                      const struct i2c_device_id *id)
204 {
205         const struct tps_driver_data *drv_data = (void *)id->driver_data;
206         const struct tps_info *info = drv_data->info;
207         struct regulator_config config = { };
208         struct regulator_init_data *init_data;
209         struct regulator_dev *rdev;
210         struct tps_pmic *tps;
211         int i;
212         int error;
213
214         /**
215          * init_data points to array of regulator_init structures
216          * coming from the board-evm file.
217          */
218         init_data = dev_get_platdata(&client->dev);
219         if (!init_data)
220                 return -EIO;
221
222         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
223         if (!tps)
224                 return -ENOMEM;
225
226         tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
227         if (IS_ERR(tps->regmap)) {
228                 error = PTR_ERR(tps->regmap);
229                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
230                         error);
231                 return error;
232         }
233
234         /* common for all regulators */
235         tps->core_regulator = drv_data->core_regulator;
236
237         for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
238                 /* Store regulator specific information */
239                 tps->info[i] = info;
240
241                 tps->desc[i].name = info->name;
242                 tps->desc[i].id = i;
243                 tps->desc[i].n_voltages = info->table_len;
244                 tps->desc[i].volt_table = info->table;
245                 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
246                                         &tps65023_ldo_ops : &tps65023_dcdc_ops);
247                 tps->desc[i].type = REGULATOR_VOLTAGE;
248                 tps->desc[i].owner = THIS_MODULE;
249
250                 tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
251                 switch (i) {
252                 case TPS65023_LDO_1:
253                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
254                         tps->desc[i].vsel_mask = 0x07;
255                         tps->desc[i].enable_mask = 1 << 1;
256                         break;
257                 case TPS65023_LDO_2:
258                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
259                         tps->desc[i].vsel_mask = 0x70;
260                         tps->desc[i].enable_mask = 1 << 2;
261                         break;
262                 default: /* DCDCx */
263                         tps->desc[i].enable_mask =
264                                         1 << (TPS65023_NUM_REGULATOR - i);
265                         tps->desc[i].vsel_reg = TPS65023_REG_DEF_CORE;
266                         tps->desc[i].vsel_mask = info->table_len - 1;
267                         tps->desc[i].apply_reg = TPS65023_REG_CON_CTRL2;
268                         tps->desc[i].apply_bit = TPS65023_REG_CTRL2_GO;
269                 }
270
271                 config.dev = &client->dev;
272                 config.init_data = init_data;
273                 config.driver_data = tps;
274                 config.regmap = tps->regmap;
275
276                 /* Register the regulators */
277                 rdev = devm_regulator_register(&client->dev, &tps->desc[i],
278                                                &config);
279                 if (IS_ERR(rdev)) {
280                         dev_err(&client->dev, "failed to register %s\n",
281                                 id->name);
282                         return PTR_ERR(rdev);
283                 }
284
285                 /* Save regulator for cleanup */
286                 tps->rdev[i] = rdev;
287         }
288
289         i2c_set_clientdata(client, tps);
290
291         /* Enable setting output voltage by I2C */
292         regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
293                                         TPS65023_REG_CTRL2_CORE_ADJ,
294                                         TPS65023_REG_CTRL2_CORE_ADJ);
295
296         return 0;
297 }
298
299 static const struct tps_info tps65020_regs[] = {
300         {
301                 .name = "VDCDC1",
302                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
303                 .table = DCDC_FIXED_3300000_VSEL_table,
304         },
305         {
306                 .name = "VDCDC2",
307                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
308                 .table = DCDC_FIXED_1800000_VSEL_table,
309         },
310         {
311                 .name = "VDCDC3",
312                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
313                 .table = VCORE_VSEL_table,
314         },
315         {
316                 .name = "LDO1",
317                 .table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
318                 .table = TPS65020_LDO_VSEL_table,
319         },
320         {
321                 .name = "LDO2",
322                 .table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
323                 .table = TPS65020_LDO_VSEL_table,
324         },
325 };
326
327 static const struct tps_info tps65021_regs[] = {
328         {
329                 .name = "VDCDC1",
330                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
331                 .table = DCDC_FIXED_3300000_VSEL_table,
332         },
333         {
334                 .name = "VDCDC2",
335                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
336                 .table = DCDC_FIXED_1800000_VSEL_table,
337         },
338         {
339                 .name = "VDCDC3",
340                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
341                 .table = VCORE_VSEL_table,
342         },
343         {
344                 .name = "LDO1",
345                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
346                 .table = TPS65023_LDO1_VSEL_table,
347         },
348         {
349                 .name = "LDO2",
350                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
351                 .table = TPS65023_LDO2_VSEL_table,
352         },
353 };
354
355 static const struct tps_info tps65023_regs[] = {
356         {
357                 .name = "VDCDC1",
358                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
359                 .table = VCORE_VSEL_table,
360         },
361         {
362                 .name = "VDCDC2",
363                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
364                 .table = DCDC_FIXED_3300000_VSEL_table,
365         },
366         {
367                 .name = "VDCDC3",
368                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
369                 .table = DCDC_FIXED_1800000_VSEL_table,
370         },
371         {
372                 .name = "LDO1",
373                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
374                 .table = TPS65023_LDO1_VSEL_table,
375         },
376         {
377                 .name = "LDO2",
378                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
379                 .table = TPS65023_LDO2_VSEL_table,
380         },
381 };
382
383 static struct tps_driver_data tps65020_drv_data = {
384         .info = tps65020_regs,
385         .core_regulator = TPS65023_DCDC_3,
386 };
387
388 static struct tps_driver_data tps65021_drv_data = {
389         .info = tps65021_regs,
390         .core_regulator = TPS65023_DCDC_3,
391 };
392
393 static struct tps_driver_data tps65023_drv_data = {
394         .info = tps65023_regs,
395         .core_regulator = TPS65023_DCDC_1,
396 };
397
398 static const struct i2c_device_id tps_65023_id[] = {
399         {.name = "tps65023",
400         .driver_data = (unsigned long) &tps65023_drv_data},
401         {.name = "tps65021",
402         .driver_data = (unsigned long) &tps65021_drv_data,},
403         {.name = "tps65020",
404         .driver_data = (unsigned long) &tps65020_drv_data},
405         { },
406 };
407
408 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
409
410 static struct i2c_driver tps_65023_i2c_driver = {
411         .driver = {
412                 .name = "tps65023",
413                 .owner = THIS_MODULE,
414         },
415         .probe = tps_65023_probe,
416         .id_table = tps_65023_id,
417 };
418
419 static int __init tps_65023_init(void)
420 {
421         return i2c_add_driver(&tps_65023_i2c_driver);
422 }
423 subsys_initcall(tps_65023_init);
424
425 static void __exit tps_65023_cleanup(void)
426 {
427         i2c_del_driver(&tps_65023_i2c_driver);
428 }
429 module_exit(tps_65023_cleanup);
430
431 MODULE_AUTHOR("Texas Instruments");
432 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
433 MODULE_LICENSE("GPL v2");