3ef67a86115c9c09e0196915c17f745d0099bb31
[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         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
215                 return -EIO;
216
217         /**
218          * init_data points to array of regulator_init structures
219          * coming from the board-evm file.
220          */
221         init_data = dev_get_platdata(&client->dev);
222         if (!init_data)
223                 return -EIO;
224
225         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
226         if (!tps)
227                 return -ENOMEM;
228
229         tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
230         if (IS_ERR(tps->regmap)) {
231                 error = PTR_ERR(tps->regmap);
232                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
233                         error);
234                 return error;
235         }
236
237         /* common for all regulators */
238         tps->core_regulator = drv_data->core_regulator;
239
240         for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
241                 /* Store regulator specific information */
242                 tps->info[i] = info;
243
244                 tps->desc[i].name = info->name;
245                 tps->desc[i].id = i;
246                 tps->desc[i].n_voltages = info->table_len;
247                 tps->desc[i].volt_table = info->table;
248                 tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
249                                         &tps65023_ldo_ops : &tps65023_dcdc_ops);
250                 tps->desc[i].type = REGULATOR_VOLTAGE;
251                 tps->desc[i].owner = THIS_MODULE;
252
253                 tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
254                 switch (i) {
255                 case TPS65023_LDO_1:
256                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
257                         tps->desc[i].vsel_mask = 0x07;
258                         tps->desc[i].enable_mask = 1 << 1;
259                         break;
260                 case TPS65023_LDO_2:
261                         tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
262                         tps->desc[i].vsel_mask = 0x70;
263                         tps->desc[i].enable_mask = 1 << 2;
264                         break;
265                 default: /* DCDCx */
266                         tps->desc[i].enable_mask =
267                                         1 << (TPS65023_NUM_REGULATOR - i);
268                         tps->desc[i].vsel_reg = TPS65023_REG_DEF_CORE;
269                         tps->desc[i].vsel_mask = info->table_len - 1;
270                         tps->desc[i].apply_reg = TPS65023_REG_CON_CTRL2;
271                         tps->desc[i].apply_bit = TPS65023_REG_CTRL2_GO;
272                 }
273
274                 config.dev = &client->dev;
275                 config.init_data = init_data;
276                 config.driver_data = tps;
277                 config.regmap = tps->regmap;
278
279                 /* Register the regulators */
280                 rdev = devm_regulator_register(&client->dev, &tps->desc[i],
281                                                &config);
282                 if (IS_ERR(rdev)) {
283                         dev_err(&client->dev, "failed to register %s\n",
284                                 id->name);
285                         return PTR_ERR(rdev);
286                 }
287
288                 /* Save regulator for cleanup */
289                 tps->rdev[i] = rdev;
290         }
291
292         i2c_set_clientdata(client, tps);
293
294         /* Enable setting output voltage by I2C */
295         regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
296                                         TPS65023_REG_CTRL2_CORE_ADJ,
297                                         TPS65023_REG_CTRL2_CORE_ADJ);
298
299         return 0;
300 }
301
302 static const struct tps_info tps65020_regs[] = {
303         {
304                 .name = "VDCDC1",
305                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
306                 .table = DCDC_FIXED_3300000_VSEL_table,
307         },
308         {
309                 .name = "VDCDC2",
310                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
311                 .table = DCDC_FIXED_1800000_VSEL_table,
312         },
313         {
314                 .name = "VDCDC3",
315                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
316                 .table = VCORE_VSEL_table,
317         },
318         {
319                 .name = "LDO1",
320                 .table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
321                 .table = TPS65020_LDO_VSEL_table,
322         },
323         {
324                 .name = "LDO2",
325                 .table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
326                 .table = TPS65020_LDO_VSEL_table,
327         },
328 };
329
330 static const struct tps_info tps65021_regs[] = {
331         {
332                 .name = "VDCDC1",
333                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
334                 .table = DCDC_FIXED_3300000_VSEL_table,
335         },
336         {
337                 .name = "VDCDC2",
338                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
339                 .table = DCDC_FIXED_1800000_VSEL_table,
340         },
341         {
342                 .name = "VDCDC3",
343                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
344                 .table = VCORE_VSEL_table,
345         },
346         {
347                 .name = "LDO1",
348                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
349                 .table = TPS65023_LDO1_VSEL_table,
350         },
351         {
352                 .name = "LDO2",
353                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
354                 .table = TPS65023_LDO2_VSEL_table,
355         },
356 };
357
358 static const struct tps_info tps65023_regs[] = {
359         {
360                 .name = "VDCDC1",
361                 .table_len = ARRAY_SIZE(VCORE_VSEL_table),
362                 .table = VCORE_VSEL_table,
363         },
364         {
365                 .name = "VDCDC2",
366                 .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
367                 .table = DCDC_FIXED_3300000_VSEL_table,
368         },
369         {
370                 .name = "VDCDC3",
371                 .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
372                 .table = DCDC_FIXED_1800000_VSEL_table,
373         },
374         {
375                 .name = "LDO1",
376                 .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
377                 .table = TPS65023_LDO1_VSEL_table,
378         },
379         {
380                 .name = "LDO2",
381                 .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
382                 .table = TPS65023_LDO2_VSEL_table,
383         },
384 };
385
386 static struct tps_driver_data tps65020_drv_data = {
387         .info = tps65020_regs,
388         .core_regulator = TPS65023_DCDC_3,
389 };
390
391 static struct tps_driver_data tps65021_drv_data = {
392         .info = tps65021_regs,
393         .core_regulator = TPS65023_DCDC_3,
394 };
395
396 static struct tps_driver_data tps65023_drv_data = {
397         .info = tps65023_regs,
398         .core_regulator = TPS65023_DCDC_1,
399 };
400
401 static const struct i2c_device_id tps_65023_id[] = {
402         {.name = "tps65023",
403         .driver_data = (unsigned long) &tps65023_drv_data},
404         {.name = "tps65021",
405         .driver_data = (unsigned long) &tps65021_drv_data,},
406         {.name = "tps65020",
407         .driver_data = (unsigned long) &tps65020_drv_data},
408         { },
409 };
410
411 MODULE_DEVICE_TABLE(i2c, tps_65023_id);
412
413 static struct i2c_driver tps_65023_i2c_driver = {
414         .driver = {
415                 .name = "tps65023",
416                 .owner = THIS_MODULE,
417         },
418         .probe = tps_65023_probe,
419         .id_table = tps_65023_id,
420 };
421
422 static int __init tps_65023_init(void)
423 {
424         return i2c_add_driver(&tps_65023_i2c_driver);
425 }
426 subsys_initcall(tps_65023_init);
427
428 static void __exit tps_65023_cleanup(void)
429 {
430         i2c_del_driver(&tps_65023_i2c_driver);
431 }
432 module_exit(tps_65023_cleanup);
433
434 MODULE_AUTHOR("Texas Instruments");
435 MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
436 MODULE_LICENSE("GPL v2");