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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / regulator / tps6586x-regulator.c
blob0485d47f0d8a82d9de595a8df5bd73c16111d4f2
1 /*
2 * Regulator driver for TI TPS6586x
3 *
4 * Copyright (C) 2010 Compulab Ltd.
5 * Author: Mike Rapoport <mike@compulab.co.il>
6 *
7 * Based on da903x
8 * Copyright (C) 2006-2008 Marvell International Ltd.
9 * Copyright (C) 2008 Compulab Ltd.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/err.h>
20 #include <linux/of.h>
21 #include <linux/slab.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/machine.h>
25 #include <linux/regulator/of_regulator.h>
26 #include <linux/mfd/tps6586x.h>
27
28 /* supply control and voltage setting */
29 #define TPS6586X_SUPPLYENA 0x10
30 #define TPS6586X_SUPPLYENB 0x11
31 #define TPS6586X_SUPPLYENC 0x12
32 #define TPS6586X_SUPPLYEND 0x13
33 #define TPS6586X_SUPPLYENE 0x14
34 #define TPS6586X_VCC1 0x20
35 #define TPS6586X_VCC2 0x21
36 #define TPS6586X_SM1V1 0x23
37 #define TPS6586X_SM1V2 0x24
38 #define TPS6586X_SM1SL 0x25
39 #define TPS6586X_SM0V1 0x26
40 #define TPS6586X_SM0V2 0x27
41 #define TPS6586X_SM0SL 0x28
42 #define TPS6586X_LDO2AV1 0x29
43 #define TPS6586X_LDO2AV2 0x2A
44 #define TPS6586X_LDO2BV1 0x2F
45 #define TPS6586X_LDO2BV2 0x30
46 #define TPS6586X_LDO4V1 0x32
47 #define TPS6586X_LDO4V2 0x33
48
49 /* converter settings */
50 #define TPS6586X_SUPPLYV1 0x41
51 #define TPS6586X_SUPPLYV2 0x42
52 #define TPS6586X_SUPPLYV3 0x43
53 #define TPS6586X_SUPPLYV4 0x44
54 #define TPS6586X_SUPPLYV5 0x45
55 #define TPS6586X_SUPPLYV6 0x46
56 #define TPS6586X_SMODE1 0x47
57 #define TPS6586X_SMODE2 0x48
58
59 struct tps6586x_regulator {
60 struct regulator_desc desc;
61
62 int enable_bit[2];
63 int enable_reg[2];
64 };
65
66 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
67 {
68 return rdev_get_dev(rdev)->parent;
69 }
70
71 static struct regulator_ops tps6586x_regulator_ops = {
72 .list_voltage = regulator_list_voltage_table,
73 .map_voltage = regulator_map_voltage_ascend,
74 .get_voltage_sel = regulator_get_voltage_sel_regmap,
75 .set_voltage_sel = regulator_set_voltage_sel_regmap,
76
77 .is_enabled = regulator_is_enabled_regmap,
78 .enable = regulator_enable_regmap,
79 .disable = regulator_disable_regmap,
80 };
81
82 static struct regulator_ops tps6586x_sys_regulator_ops = {
83 };
84
85 static const unsigned int tps6586x_ldo0_voltages[] = {
86 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
87 };
88
89 static const unsigned int tps6586x_ldo4_voltages[] = {
90 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000,
91 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000,
92 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000,
93 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000,
94 };
95
96 #define tps658623_sm2_voltages tps6586x_ldo4_voltages
97
98 static const unsigned int tps6586x_ldo_voltages[] = {
99 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
100 };
101
102 static const unsigned int tps6586x_sm2_voltages[] = {
103 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000,
104 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000,
105 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000,
106 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000,
107 };
108
109 static const unsigned int tps658643_sm2_voltages[] = {
110 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 1200000,
111 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000, 1400000,
112 1425000, 1450000, 1475000, 1500000, 1525000, 1550000, 1575000, 1600000,
113 1625000, 1650000, 1675000, 1700000, 1725000, 1750000, 1775000, 1800000,
114 };
115
116 static const unsigned int tps6586x_dvm_voltages[] = {
117 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000,
118 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000,
119 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
120 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
121 };
122
123 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \
124 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
125 .desc = { \
126 .supply_name = _pin_name, \
127 .name = "REG-" #_id, \
128 .ops = &tps6586x_regulator_ops, \
129 .type = REGULATOR_VOLTAGE, \
130 .id = TPS6586X_ID_##_id, \
131 .n_voltages = ARRAY_SIZE(vdata##_voltages), \
132 .volt_table = vdata##_voltages, \
133 .owner = THIS_MODULE, \
134 .enable_reg = TPS6586X_SUPPLY##ereg0, \
135 .enable_mask = 1 << (ebit0), \
136 .vsel_reg = TPS6586X_##vreg, \
137 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \
138 .apply_reg = (goreg), \
139 .apply_bit = (gobit), \
140 }, \
141 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
142 .enable_bit[0] = (ebit0), \
143 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
144 .enable_bit[1] = (ebit1),
145
146 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \
147 ereg0, ebit0, ereg1, ebit1) \
148 { \
149 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
150 ereg0, ebit0, ereg1, ebit1, 0, 0) \
151 }
152
153 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \
154 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
155 { \
156 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
157 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
158 }
159
160 #define TPS6586X_SYS_REGULATOR() \
161 { \
162 .desc = { \
163 .supply_name = "sys", \
164 .name = "REG-SYS", \
165 .ops = &tps6586x_sys_regulator_ops, \
166 .type = REGULATOR_VOLTAGE, \
167 .id = TPS6586X_ID_SYS, \
168 .owner = THIS_MODULE, \
169 }, \
170 }
171
172 static struct tps6586x_regulator tps6586x_regulator[] = {
173 TPS6586X_SYS_REGULATOR(),
174 TPS6586X_LDO(LDO_0, "vinldo01", tps6586x_ldo0, SUPPLYV1, 5, 3, ENC, 0,
175 END, 0),
176 TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo, SUPPLYV4, 0, 3, ENC, 2,
177 END, 2),
178 TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo, SUPPLYV6, 0, 3, ENE, 6,
179 ENE, 6),
180 TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo, SUPPLYV3, 0, 3, ENC, 4,
181 END, 4),
182 TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo, SUPPLYV3, 3, 3, ENC, 5,
183 END, 5),
184 TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo, SUPPLYV2, 5, 3, ENC, 6,
185 END, 6),
186 TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo, SUPPLYV6, 3, 3, ENE, 7,
187 ENE, 7),
188 TPS6586X_LDO(LDO_RTC, "REG-SYS", tps6586x_ldo, SUPPLYV4, 3, 3, V4, 7,
189 V4, 7),
190 TPS6586X_LDO(LDO_1, "vinldo01", tps6586x_dvm, SUPPLYV1, 0, 5, ENC, 1,
191 END, 1),
192 TPS6586X_LDO(SM_2, "vin-sm2", tps6586x_sm2, SUPPLYV2, 0, 5, ENC, 7,
193 END, 7),
194
195 TPS6586X_DVM(LDO_2, "vinldo23", tps6586x_dvm, LDO2BV1, 0, 5, ENA, 3,
196 ENB, 3, TPS6586X_VCC2, BIT(6)),
197 TPS6586X_DVM(LDO_4, "vinldo4", tps6586x_ldo4, LDO4V1, 0, 5, ENC, 3,
198 END, 3, TPS6586X_VCC1, BIT(6)),
199 TPS6586X_DVM(SM_0, "vin-sm0", tps6586x_dvm, SM0V1, 0, 5, ENA, 1,
200 ENB, 1, TPS6586X_VCC1, BIT(2)),
201 TPS6586X_DVM(SM_1, "vin-sm1", tps6586x_dvm, SM1V1, 0, 5, ENA, 0,
202 ENB, 0, TPS6586X_VCC1, BIT(0)),
203 };
204
205 static struct tps6586x_regulator tps658623_regulator[] = {
206 TPS6586X_LDO(SM_2, "vin-sm2", tps658623_sm2, SUPPLYV2, 0, 5, ENC, 7,
207 END, 7),
208 };
209
210 static struct tps6586x_regulator tps658643_regulator[] = {
211 TPS6586X_LDO(SM_2, "vin-sm2", tps658643_sm2, SUPPLYV2, 0, 5, ENC, 7,
212 END, 7),
213 };
214
215 /*
216 * TPS6586X has 2 enable bits that are OR'ed to determine the actual
217 * regulator state. Clearing one of this bits allows switching
218 * regulator on and of with single register write.
219 */
220 static inline int tps6586x_regulator_preinit(struct device *parent,
221 struct tps6586x_regulator *ri)
222 {
223 uint8_t val1, val2;
224 int ret;
225
226 if (ri->enable_reg[0] == ri->enable_reg[1] &&
227 ri->enable_bit[0] == ri->enable_bit[1])
228 return 0;
229
230 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
231 if (ret)
232 return ret;
233
234 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
235 if (ret)
236 return ret;
237
238 if (!(val2 & (1 << ri->enable_bit[1])))
239 return 0;
240
241 /*
242 * The regulator is on, but it's enabled with the bit we don't
243 * want to use, so we switch the enable bits
244 */
245 if (!(val1 & (1 << ri->enable_bit[0]))) {
246 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
247 1 << ri->enable_bit[0]);
248 if (ret)
249 return ret;
250 }
251
252 return tps6586x_clr_bits(parent, ri->enable_reg[1],
253 1 << ri->enable_bit[1]);
254 }
255
256 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev,
257 int id, struct regulator_init_data *p)
258 {
259 struct device *parent = pdev->dev.parent;
260 struct tps6586x_settings *setting = p->driver_data;
261 uint8_t reg;
262
263 if (setting == NULL)
264 return 0;
265
266 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
267 return 0;
268
269 /* only SM0 and SM1 can have the slew rate settings */
270 switch (id) {
271 case TPS6586X_ID_SM_0:
272 reg = TPS6586X_SM0SL;
273 break;
274 case TPS6586X_ID_SM_1:
275 reg = TPS6586X_SM1SL;
276 break;
277 default:
278 dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
279 return -EINVAL;
280 }
281
282 return tps6586x_write(parent, reg,
283 setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
284 }
285
286 static struct tps6586x_regulator *find_regulator_info(int id, int version)
287 {
288 struct tps6586x_regulator *ri;
289 struct tps6586x_regulator *table = NULL;
290 int num;
291 int i;
292
293 switch (version) {
294 case TPS658623:
295 table = tps658623_regulator;
296 num = ARRAY_SIZE(tps658623_regulator);
297 break;
298 case TPS658643:
299 table = tps658643_regulator;
300 num = ARRAY_SIZE(tps658643_regulator);
301 break;
302 }
303
304 /* Search version specific table first */
305 if (table) {
306 for (i = 0; i < num; i++) {
307 ri = &table[i];
308 if (ri->desc.id == id)
309 return ri;
310 }
311 }
312
313 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
314 ri = &tps6586x_regulator[i];
315 if (ri->desc.id == id)
316 return ri;
317 }
318 return NULL;
319 }
320
321 #ifdef CONFIG_OF
322 static struct of_regulator_match tps6586x_matches[] = {
323 { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },
324 { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
325 { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
326 { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
327 { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
328 { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
329 { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
330 { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
331 { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
332 { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
333 { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
334 { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
335 { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
336 { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
337 { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
338 };
339
340 static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
341 struct platform_device *pdev,
342 struct of_regulator_match **tps6586x_reg_matches)
343 {
344 const unsigned int num = ARRAY_SIZE(tps6586x_matches);
345 struct device_node *np = pdev->dev.parent->of_node;
346 struct device_node *regs;
347 const char *sys_rail = NULL;
348 unsigned int i;
349 struct tps6586x_platform_data *pdata;
350 int err;
351
352 regs = of_get_child_by_name(np, "regulators");
353 if (!regs) {
354 dev_err(&pdev->dev, "regulator node not found\n");
355 return NULL;
356 }
357
358 err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num);
359 of_node_put(regs);
360 if (err < 0) {
361 dev_err(&pdev->dev, "Regulator match failed, e %d\n", err);
362 return NULL;
363 }
364
365 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
366 if (!pdata) {
367 dev_err(&pdev->dev, "Memory alloction failed\n");
368 return NULL;
369 }
370
371 for (i = 0; i < num; i++) {
372 int id;
373 if (!tps6586x_matches[i].init_data)
374 continue;
375
376 pdata->reg_init_data[i] = tps6586x_matches[i].init_data;
377 id = (int)tps6586x_matches[i].driver_data;
378 if (id == TPS6586X_ID_SYS)
379 sys_rail = pdata->reg_init_data[i]->constraints.name;
380
381 if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC))
382 pdata->reg_init_data[i]->supply_regulator = sys_rail;
383 }
384 *tps6586x_reg_matches = tps6586x_matches;
385 return pdata;
386 }
387 #else
388 static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
389 struct platform_device *pdev,
390 struct of_regulator_match **tps6586x_reg_matches)
391 {
392 *tps6586x_reg_matches = NULL;
393 return NULL;
394 }
395 #endif
396
397 static int tps6586x_regulator_probe(struct platform_device *pdev)
398 {
399 struct tps6586x_regulator *ri = NULL;
400 struct regulator_config config = { };
401 struct regulator_dev **rdev;
402 struct regulator_init_data *reg_data;
403 struct tps6586x_platform_data *pdata;
404 struct of_regulator_match *tps6586x_reg_matches = NULL;
405 int version;
406 int id;
407 int err;
408
409 dev_dbg(&pdev->dev, "Probing regulator\n");
410
411 pdata = dev_get_platdata(pdev->dev.parent);
412 if ((!pdata) && (pdev->dev.parent->of_node))
413 pdata = tps6586x_parse_regulator_dt(pdev,
414 &tps6586x_reg_matches);
415
416 if (!pdata) {
417 dev_err(&pdev->dev, "Platform data not available, exiting\n");
418 return -ENODEV;
419 }
420
421 rdev = devm_kzalloc(&pdev->dev, TPS6586X_ID_MAX_REGULATOR *
422 sizeof(*rdev), GFP_KERNEL);
423 if (!rdev) {
424 dev_err(&pdev->dev, "Mmemory alloc failed\n");
425 return -ENOMEM;
426 }
427
428 version = tps6586x_get_version(pdev->dev.parent);
429
430 for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) {
431 reg_data = pdata->reg_init_data[id];
432
433 ri = find_regulator_info(id, version);
434
435 if (!ri) {
436 dev_err(&pdev->dev, "invalid regulator ID specified\n");
437 return -EINVAL;
438 }
439
440 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
441 if (err) {
442 dev_err(&pdev->dev,
443 "regulator %d preinit failed, e %d\n", id, err);
444 return err;
445 }
446
447 config.dev = pdev->dev.parent;
448 config.init_data = reg_data;
449 config.driver_data = ri;
450
451 if (tps6586x_reg_matches)
452 config.of_node = tps6586x_reg_matches[id].of_node;
453
454 rdev[id] = devm_regulator_register(&pdev->dev, &ri->desc,
455 &config);
456 if (IS_ERR(rdev[id])) {
457 dev_err(&pdev->dev, "failed to register regulator %s\n",
458 ri->desc.name);
459 return PTR_ERR(rdev[id]);
460 }
461
462 if (reg_data) {
463 err = tps6586x_regulator_set_slew_rate(pdev, id,
464 reg_data);
465 if (err < 0) {
466 dev_err(&pdev->dev,
467 "Slew rate config failed, e %d\n", err);
468 return err;
469 }
470 }
471 }
472
473 platform_set_drvdata(pdev, rdev);
474 return 0;
475 }
476
477 static struct platform_driver tps6586x_regulator_driver = {
478 .driver = {
479 .name = "tps6586x-regulator",
480 .owner = THIS_MODULE,
481 },
482 .probe = tps6586x_regulator_probe,
483 };
484
485 static int __init tps6586x_regulator_init(void)
486 {
487 return platform_driver_register(&tps6586x_regulator_driver);
488 }
489 subsys_initcall(tps6586x_regulator_init);
490
491 static void __exit tps6586x_regulator_exit(void)
492 {
493 platform_driver_unregister(&tps6586x_regulator_driver);
494 }
495 module_exit(tps6586x_regulator_exit);
496
497 MODULE_LICENSE("GPL");
498 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
499 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
500 MODULE_ALIAS("platform:tps6586x-regulator");
Linux with added FPC-III support