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1 | /* | |
2 | * tps6507x-regulator.c | |
3 | * | |
4 | * Regulator driver for TPS65073 PMIC | |
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/regulator/tps6507x.h> | |
26 | #include <linux/of.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/mfd/tps6507x.h> | |
29 | #include <linux/regulator/of_regulator.h> | |
30 | ||
31 | /* DCDC's */ | |
32 | #define TPS6507X_DCDC_1 0 | |
33 | #define TPS6507X_DCDC_2 1 | |
34 | #define TPS6507X_DCDC_3 2 | |
35 | /* LDOs */ | |
36 | #define TPS6507X_LDO_1 3 | |
37 | #define TPS6507X_LDO_2 4 | |
38 | ||
39 | #define TPS6507X_MAX_REG_ID TPS6507X_LDO_2 | |
40 | ||
41 | /* Number of step-down converters available */ | |
42 | #define TPS6507X_NUM_DCDC 3 | |
43 | /* Number of LDO voltage regulators available */ | |
44 | #define TPS6507X_NUM_LDO 2 | |
45 | /* Number of total regulators available */ | |
46 | #define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO) | |
47 | ||
48 | /* Supported voltage values for regulators (in microVolts) */ | |
49 | static const unsigned int VDCDCx_VSEL_table[] = { | |
50 | 725000, 750000, 775000, 800000, | |
51 | 825000, 850000, 875000, 900000, | |
52 | 925000, 950000, 975000, 1000000, | |
53 | 1025000, 1050000, 1075000, 1100000, | |
54 | 1125000, 1150000, 1175000, 1200000, | |
55 | 1225000, 1250000, 1275000, 1300000, | |
56 | 1325000, 1350000, 1375000, 1400000, | |
57 | 1425000, 1450000, 1475000, 1500000, | |
58 | 1550000, 1600000, 1650000, 1700000, | |
59 | 1750000, 1800000, 1850000, 1900000, | |
60 | 1950000, 2000000, 2050000, 2100000, | |
61 | 2150000, 2200000, 2250000, 2300000, | |
62 | 2350000, 2400000, 2450000, 2500000, | |
63 | 2550000, 2600000, 2650000, 2700000, | |
64 | 2750000, 2800000, 2850000, 2900000, | |
65 | 3000000, 3100000, 3200000, 3300000, | |
66 | }; | |
67 | ||
68 | static const unsigned int LDO1_VSEL_table[] = { | |
69 | 1000000, 1100000, 1200000, 1250000, | |
70 | 1300000, 1350000, 1400000, 1500000, | |
71 | 1600000, 1800000, 2500000, 2750000, | |
72 | 2800000, 3000000, 3100000, 3300000, | |
73 | }; | |
74 | ||
75 | /* The voltage mapping table for LDO2 is the same as VDCDCx */ | |
76 | #define LDO2_VSEL_table VDCDCx_VSEL_table | |
77 | ||
78 | struct tps_info { | |
79 | const char *name; | |
80 | u8 table_len; | |
81 | const unsigned int *table; | |
82 | ||
83 | /* Does DCDC high or the low register defines output voltage? */ | |
84 | bool defdcdc_default; | |
85 | }; | |
86 | ||
87 | static struct tps_info tps6507x_pmic_regs[] = { | |
88 | { | |
89 | .name = "VDCDC1", | |
90 | .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), | |
91 | .table = VDCDCx_VSEL_table, | |
92 | }, | |
93 | { | |
94 | .name = "VDCDC2", | |
95 | .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), | |
96 | .table = VDCDCx_VSEL_table, | |
97 | }, | |
98 | { | |
99 | .name = "VDCDC3", | |
100 | .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), | |
101 | .table = VDCDCx_VSEL_table, | |
102 | }, | |
103 | { | |
104 | .name = "LDO1", | |
105 | .table_len = ARRAY_SIZE(LDO1_VSEL_table), | |
106 | .table = LDO1_VSEL_table, | |
107 | }, | |
108 | { | |
109 | .name = "LDO2", | |
110 | .table_len = ARRAY_SIZE(LDO2_VSEL_table), | |
111 | .table = LDO2_VSEL_table, | |
112 | }, | |
113 | }; | |
114 | ||
115 | struct tps6507x_pmic { | |
116 | struct regulator_desc desc[TPS6507X_NUM_REGULATOR]; | |
117 | struct tps6507x_dev *mfd; | |
118 | struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR]; | |
119 | struct tps_info *info[TPS6507X_NUM_REGULATOR]; | |
120 | struct mutex io_lock; | |
121 | }; | |
122 | static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg) | |
123 | { | |
124 | u8 val; | |
125 | int err; | |
126 | ||
127 | err = tps->mfd->read_dev(tps->mfd, reg, 1, &val); | |
128 | ||
129 | if (err) | |
130 | return err; | |
131 | ||
132 | return val; | |
133 | } | |
134 | ||
135 | static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val) | |
136 | { | |
137 | return tps->mfd->write_dev(tps->mfd, reg, 1, &val); | |
138 | } | |
139 | ||
140 | static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask) | |
141 | { | |
142 | int err, data; | |
143 | ||
144 | mutex_lock(&tps->io_lock); | |
145 | ||
146 | data = tps6507x_pmic_read(tps, reg); | |
147 | if (data < 0) { | |
148 | dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg); | |
149 | err = data; | |
150 | goto out; | |
151 | } | |
152 | ||
153 | data |= mask; | |
154 | err = tps6507x_pmic_write(tps, reg, data); | |
155 | if (err) | |
156 | dev_err(tps->mfd->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 tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask) | |
164 | { | |
165 | int err, data; | |
166 | ||
167 | mutex_lock(&tps->io_lock); | |
168 | ||
169 | data = tps6507x_pmic_read(tps, reg); | |
170 | if (data < 0) { | |
171 | dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg); | |
172 | err = data; | |
173 | goto out; | |
174 | } | |
175 | ||
176 | data &= ~mask; | |
177 | err = tps6507x_pmic_write(tps, reg, data); | |
178 | if (err) | |
179 | dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg); | |
180 | ||
181 | out: | |
182 | mutex_unlock(&tps->io_lock); | |
183 | return err; | |
184 | } | |
185 | ||
186 | static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg) | |
187 | { | |
188 | int data; | |
189 | ||
190 | mutex_lock(&tps->io_lock); | |
191 | ||
192 | data = tps6507x_pmic_read(tps, reg); | |
193 | if (data < 0) | |
194 | dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg); | |
195 | ||
196 | mutex_unlock(&tps->io_lock); | |
197 | return data; | |
198 | } | |
199 | ||
200 | static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val) | |
201 | { | |
202 | int err; | |
203 | ||
204 | mutex_lock(&tps->io_lock); | |
205 | ||
206 | err = tps6507x_pmic_write(tps, reg, val); | |
207 | if (err < 0) | |
208 | dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg); | |
209 | ||
210 | mutex_unlock(&tps->io_lock); | |
211 | return err; | |
212 | } | |
213 | ||
214 | static int tps6507x_pmic_is_enabled(struct regulator_dev *dev) | |
215 | { | |
216 | struct tps6507x_pmic *tps = rdev_get_drvdata(dev); | |
217 | int data, rid = rdev_get_id(dev); | |
218 | u8 shift; | |
219 | ||
220 | if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2) | |
221 | return -EINVAL; | |
222 | ||
223 | shift = TPS6507X_MAX_REG_ID - rid; | |
224 | data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1); | |
225 | ||
226 | if (data < 0) | |
227 | return data; | |
228 | else | |
229 | return (data & 1<<shift) ? 1 : 0; | |
230 | } | |
231 | ||
232 | static int tps6507x_pmic_enable(struct regulator_dev *dev) | |
233 | { | |
234 | struct tps6507x_pmic *tps = rdev_get_drvdata(dev); | |
235 | int rid = rdev_get_id(dev); | |
236 | u8 shift; | |
237 | ||
238 | if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2) | |
239 | return -EINVAL; | |
240 | ||
241 | shift = TPS6507X_MAX_REG_ID - rid; | |
242 | return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); | |
243 | } | |
244 | ||
245 | static int tps6507x_pmic_disable(struct regulator_dev *dev) | |
246 | { | |
247 | struct tps6507x_pmic *tps = rdev_get_drvdata(dev); | |
248 | int rid = rdev_get_id(dev); | |
249 | u8 shift; | |
250 | ||
251 | if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2) | |
252 | return -EINVAL; | |
253 | ||
254 | shift = TPS6507X_MAX_REG_ID - rid; | |
255 | return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1, | |
256 | 1 << shift); | |
257 | } | |
258 | ||
259 | static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev) | |
260 | { | |
261 | struct tps6507x_pmic *tps = rdev_get_drvdata(dev); | |
262 | int data, rid = rdev_get_id(dev); | |
263 | u8 reg, mask; | |
264 | ||
265 | switch (rid) { | |
266 | case TPS6507X_DCDC_1: | |
267 | reg = TPS6507X_REG_DEFDCDC1; | |
268 | mask = TPS6507X_DEFDCDCX_DCDC_MASK; | |
269 | break; | |
270 | case TPS6507X_DCDC_2: | |
271 | if (tps->info[rid]->defdcdc_default) | |
272 | reg = TPS6507X_REG_DEFDCDC2_HIGH; | |
273 | else | |
274 | reg = TPS6507X_REG_DEFDCDC2_LOW; | |
275 | mask = TPS6507X_DEFDCDCX_DCDC_MASK; | |
276 | break; | |
277 | case TPS6507X_DCDC_3: | |
278 | if (tps->info[rid]->defdcdc_default) | |
279 | reg = TPS6507X_REG_DEFDCDC3_HIGH; | |
280 | else | |
281 | reg = TPS6507X_REG_DEFDCDC3_LOW; | |
282 | mask = TPS6507X_DEFDCDCX_DCDC_MASK; | |
283 | break; | |
284 | case TPS6507X_LDO_1: | |
285 | reg = TPS6507X_REG_LDO_CTRL1; | |
286 | mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK; | |
287 | break; | |
288 | case TPS6507X_LDO_2: | |
289 | reg = TPS6507X_REG_DEFLDO2; | |
290 | mask = TPS6507X_REG_DEFLDO2_LDO2_MASK; | |
291 | break; | |
292 | default: | |
293 | return -EINVAL; | |
294 | } | |
295 | ||
296 | data = tps6507x_pmic_reg_read(tps, reg); | |
297 | if (data < 0) | |
298 | return data; | |
299 | ||
300 | data &= mask; | |
301 | return data; | |
302 | } | |
303 | ||
304 | static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev, | |
305 | unsigned selector) | |
306 | { | |
307 | struct tps6507x_pmic *tps = rdev_get_drvdata(dev); | |
308 | int data, rid = rdev_get_id(dev); | |
309 | u8 reg, mask; | |
310 | ||
311 | switch (rid) { | |
312 | case TPS6507X_DCDC_1: | |
313 | reg = TPS6507X_REG_DEFDCDC1; | |
314 | mask = TPS6507X_DEFDCDCX_DCDC_MASK; | |
315 | break; | |
316 | case TPS6507X_DCDC_2: | |
317 | if (tps->info[rid]->defdcdc_default) | |
318 | reg = TPS6507X_REG_DEFDCDC2_HIGH; | |
319 | else | |
320 | reg = TPS6507X_REG_DEFDCDC2_LOW; | |
321 | mask = TPS6507X_DEFDCDCX_DCDC_MASK; | |
322 | break; | |
323 | case TPS6507X_DCDC_3: | |
324 | if (tps->info[rid]->defdcdc_default) | |
325 | reg = TPS6507X_REG_DEFDCDC3_HIGH; | |
326 | else | |
327 | reg = TPS6507X_REG_DEFDCDC3_LOW; | |
328 | mask = TPS6507X_DEFDCDCX_DCDC_MASK; | |
329 | break; | |
330 | case TPS6507X_LDO_1: | |
331 | reg = TPS6507X_REG_LDO_CTRL1; | |
332 | mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK; | |
333 | break; | |
334 | case TPS6507X_LDO_2: | |
335 | reg = TPS6507X_REG_DEFLDO2; | |
336 | mask = TPS6507X_REG_DEFLDO2_LDO2_MASK; | |
337 | break; | |
338 | default: | |
339 | return -EINVAL; | |
340 | } | |
341 | ||
342 | data = tps6507x_pmic_reg_read(tps, reg); | |
343 | if (data < 0) | |
344 | return data; | |
345 | ||
346 | data &= ~mask; | |
347 | data |= selector; | |
348 | ||
349 | return tps6507x_pmic_reg_write(tps, reg, data); | |
350 | } | |
351 | ||
352 | static struct regulator_ops tps6507x_pmic_ops = { | |
353 | .is_enabled = tps6507x_pmic_is_enabled, | |
354 | .enable = tps6507x_pmic_enable, | |
355 | .disable = tps6507x_pmic_disable, | |
356 | .get_voltage_sel = tps6507x_pmic_get_voltage_sel, | |
357 | .set_voltage_sel = tps6507x_pmic_set_voltage_sel, | |
358 | .list_voltage = regulator_list_voltage_table, | |
359 | .map_voltage = regulator_map_voltage_ascend, | |
360 | }; | |
361 | ||
362 | static struct of_regulator_match tps6507x_matches[] = { | |
363 | { .name = "VDCDC1"}, | |
364 | { .name = "VDCDC2"}, | |
365 | { .name = "VDCDC3"}, | |
366 | { .name = "LDO1"}, | |
367 | { .name = "LDO2"}, | |
368 | }; | |
369 | ||
370 | static struct tps6507x_board *tps6507x_parse_dt_reg_data( | |
371 | struct platform_device *pdev, | |
372 | struct of_regulator_match **tps6507x_reg_matches) | |
373 | { | |
374 | struct tps6507x_board *tps_board; | |
375 | struct device_node *np = pdev->dev.parent->of_node; | |
376 | struct device_node *regulators; | |
377 | struct of_regulator_match *matches; | |
378 | static struct regulator_init_data *reg_data; | |
379 | int idx = 0, count, ret; | |
380 | ||
381 | tps_board = devm_kzalloc(&pdev->dev, sizeof(*tps_board), | |
382 | GFP_KERNEL); | |
383 | if (!tps_board) | |
384 | return NULL; | |
385 | ||
386 | regulators = of_get_child_by_name(np, "regulators"); | |
387 | if (!regulators) { | |
388 | dev_err(&pdev->dev, "regulator node not found\n"); | |
389 | return NULL; | |
390 | } | |
391 | ||
392 | count = ARRAY_SIZE(tps6507x_matches); | |
393 | matches = tps6507x_matches; | |
394 | ||
395 | ret = of_regulator_match(&pdev->dev, regulators, matches, count); | |
396 | of_node_put(regulators); | |
397 | if (ret < 0) { | |
398 | dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", | |
399 | ret); | |
400 | return NULL; | |
401 | } | |
402 | ||
403 | *tps6507x_reg_matches = matches; | |
404 | ||
405 | reg_data = devm_kzalloc(&pdev->dev, (sizeof(struct regulator_init_data) | |
406 | * TPS6507X_NUM_REGULATOR), GFP_KERNEL); | |
407 | if (!reg_data) | |
408 | return NULL; | |
409 | ||
410 | tps_board->tps6507x_pmic_init_data = reg_data; | |
411 | ||
412 | for (idx = 0; idx < count; idx++) { | |
413 | if (!matches[idx].init_data || !matches[idx].of_node) | |
414 | continue; | |
415 | ||
416 | memcpy(®_data[idx], matches[idx].init_data, | |
417 | sizeof(struct regulator_init_data)); | |
418 | ||
419 | } | |
420 | ||
421 | return tps_board; | |
422 | } | |
423 | ||
424 | static int tps6507x_pmic_probe(struct platform_device *pdev) | |
425 | { | |
426 | struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent); | |
427 | struct tps_info *info = &tps6507x_pmic_regs[0]; | |
428 | struct regulator_config config = { }; | |
429 | struct regulator_init_data *init_data; | |
430 | struct regulator_dev *rdev; | |
431 | struct tps6507x_pmic *tps; | |
432 | struct tps6507x_board *tps_board; | |
433 | struct of_regulator_match *tps6507x_reg_matches = NULL; | |
434 | int i; | |
435 | int error; | |
436 | unsigned int prop; | |
437 | ||
438 | /** | |
439 | * tps_board points to pmic related constants | |
440 | * coming from the board-evm file. | |
441 | */ | |
442 | ||
443 | tps_board = dev_get_platdata(tps6507x_dev->dev); | |
444 | if (IS_ENABLED(CONFIG_OF) && !tps_board && | |
445 | tps6507x_dev->dev->of_node) | |
446 | tps_board = tps6507x_parse_dt_reg_data(pdev, | |
447 | &tps6507x_reg_matches); | |
448 | if (!tps_board) | |
449 | return -EINVAL; | |
450 | ||
451 | /** | |
452 | * init_data points to array of regulator_init structures | |
453 | * coming from the board-evm file. | |
454 | */ | |
455 | init_data = tps_board->tps6507x_pmic_init_data; | |
456 | if (!init_data) | |
457 | return -EINVAL; | |
458 | ||
459 | tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL); | |
460 | if (!tps) | |
461 | return -ENOMEM; | |
462 | ||
463 | mutex_init(&tps->io_lock); | |
464 | ||
465 | /* common for all regulators */ | |
466 | tps->mfd = tps6507x_dev; | |
467 | ||
468 | for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) { | |
469 | /* Register the regulators */ | |
470 | tps->info[i] = info; | |
471 | if (init_data->driver_data) { | |
472 | struct tps6507x_reg_platform_data *data = | |
473 | init_data->driver_data; | |
474 | tps->info[i]->defdcdc_default = data->defdcdc_default; | |
475 | } | |
476 | ||
477 | tps->desc[i].name = info->name; | |
478 | tps->desc[i].id = i; | |
479 | tps->desc[i].n_voltages = info->table_len; | |
480 | tps->desc[i].volt_table = info->table; | |
481 | tps->desc[i].ops = &tps6507x_pmic_ops; | |
482 | tps->desc[i].type = REGULATOR_VOLTAGE; | |
483 | tps->desc[i].owner = THIS_MODULE; | |
484 | ||
485 | config.dev = tps6507x_dev->dev; | |
486 | config.init_data = init_data; | |
487 | config.driver_data = tps; | |
488 | ||
489 | if (tps6507x_reg_matches) { | |
490 | error = of_property_read_u32( | |
491 | tps6507x_reg_matches[i].of_node, | |
492 | "ti,defdcdc_default", &prop); | |
493 | ||
494 | if (!error) | |
495 | tps->info[i]->defdcdc_default = prop; | |
496 | ||
497 | config.of_node = tps6507x_reg_matches[i].of_node; | |
498 | } | |
499 | ||
500 | rdev = devm_regulator_register(&pdev->dev, &tps->desc[i], | |
501 | &config); | |
502 | if (IS_ERR(rdev)) { | |
503 | dev_err(tps6507x_dev->dev, | |
504 | "failed to register %s regulator\n", | |
505 | pdev->name); | |
506 | return PTR_ERR(rdev); | |
507 | } | |
508 | ||
509 | /* Save regulator for cleanup */ | |
510 | tps->rdev[i] = rdev; | |
511 | } | |
512 | ||
513 | tps6507x_dev->pmic = tps; | |
514 | platform_set_drvdata(pdev, tps6507x_dev); | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | static struct platform_driver tps6507x_pmic_driver = { | |
520 | .driver = { | |
521 | .name = "tps6507x-pmic", | |
522 | }, | |
523 | .probe = tps6507x_pmic_probe, | |
524 | }; | |
525 | ||
526 | static int __init tps6507x_pmic_init(void) | |
527 | { | |
528 | return platform_driver_register(&tps6507x_pmic_driver); | |
529 | } | |
530 | subsys_initcall(tps6507x_pmic_init); | |
531 | ||
532 | static void __exit tps6507x_pmic_cleanup(void) | |
533 | { | |
534 | platform_driver_unregister(&tps6507x_pmic_driver); | |
535 | } | |
536 | module_exit(tps6507x_pmic_cleanup); | |
537 | ||
538 | MODULE_AUTHOR("Texas Instruments"); | |
539 | MODULE_DESCRIPTION("TPS6507x voltage regulator driver"); | |
540 | MODULE_LICENSE("GPL v2"); | |
541 | MODULE_ALIAS("platform:tps6507x-pmic"); |