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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / regulator / tps6586x-regulator.c
blob2c9155b66f09f914789c4afde4a8fd630ddd6eba
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 static const unsigned int tps6586x_ldo_voltages[] = {
97 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
98 };
99
100 static const unsigned int tps6586x_sm2_voltages[] = {
101 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000,
102 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000,
103 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000,
104 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000,
105 };
106
107 static const unsigned int tps6586x_dvm_voltages[] = {
108 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000,
109 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000,
110 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
111 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
112 };
113
114 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \
115 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
116 .desc = { \
117 .supply_name = _pin_name, \
118 .name = "REG-" #_id, \
119 .ops = &tps6586x_regulator_ops, \
120 .type = REGULATOR_VOLTAGE, \
121 .id = TPS6586X_ID_##_id, \
122 .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \
123 .volt_table = tps6586x_##vdata##_voltages, \
124 .owner = THIS_MODULE, \
125 .enable_reg = TPS6586X_SUPPLY##ereg0, \
126 .enable_mask = 1 << (ebit0), \
127 .vsel_reg = TPS6586X_##vreg, \
128 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \
129 .apply_reg = (goreg), \
130 .apply_bit = (gobit), \
131 }, \
132 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
133 .enable_bit[0] = (ebit0), \
134 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
135 .enable_bit[1] = (ebit1),
136
137 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \
138 ereg0, ebit0, ereg1, ebit1) \
139 { \
140 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
141 ereg0, ebit0, ereg1, ebit1, 0, 0) \
142 }
143
144 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \
145 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
146 { \
147 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
148 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
149 }
150
151 #define TPS6586X_SYS_REGULATOR() \
152 { \
153 .desc = { \
154 .supply_name = "sys", \
155 .name = "REG-SYS", \
156 .ops = &tps6586x_sys_regulator_ops, \
157 .type = REGULATOR_VOLTAGE, \
158 .id = TPS6586X_ID_SYS, \
159 .owner = THIS_MODULE, \
160 }, \
161 }
162
163 static struct tps6586x_regulator tps6586x_regulator[] = {
164 TPS6586X_SYS_REGULATOR(),
165 TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0),
166 TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
167 TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
168 TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
169 TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
170 TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
171 TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
172 TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
173 TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
174 TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
175
176 TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
177 ENB, 3, TPS6586X_VCC2, BIT(6)),
178 TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
179 END, 3, TPS6586X_VCC1, BIT(6)),
180 TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1,
181 ENB, 1, TPS6586X_VCC1, BIT(2)),
182 TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0,
183 ENB, 0, TPS6586X_VCC1, BIT(0)),
184 };
185
186 /*
187 * TPS6586X has 2 enable bits that are OR'ed to determine the actual
188 * regulator state. Clearing one of this bits allows switching
189 * regulator on and of with single register write.
190 */
191 static inline int tps6586x_regulator_preinit(struct device *parent,
192 struct tps6586x_regulator *ri)
193 {
194 uint8_t val1, val2;
195 int ret;
196
197 if (ri->enable_reg[0] == ri->enable_reg[1] &&
198 ri->enable_bit[0] == ri->enable_bit[1])
199 return 0;
200
201 ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
202 if (ret)
203 return ret;
204
205 ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
206 if (ret)
207 return ret;
208
209 if (!(val2 & (1 << ri->enable_bit[1])))
210 return 0;
211
212 /*
213 * The regulator is on, but it's enabled with the bit we don't
214 * want to use, so we switch the enable bits
215 */
216 if (!(val1 & (1 << ri->enable_bit[0]))) {
217 ret = tps6586x_set_bits(parent, ri->enable_reg[0],
218 1 << ri->enable_bit[0]);
219 if (ret)
220 return ret;
221 }
222
223 return tps6586x_clr_bits(parent, ri->enable_reg[1],
224 1 << ri->enable_bit[1]);
225 }
226
227 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev,
228 int id, struct regulator_init_data *p)
229 {
230 struct device *parent = pdev->dev.parent;
231 struct tps6586x_settings *setting = p->driver_data;
232 uint8_t reg;
233
234 if (setting == NULL)
235 return 0;
236
237 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
238 return 0;
239
240 /* only SM0 and SM1 can have the slew rate settings */
241 switch (id) {
242 case TPS6586X_ID_SM_0:
243 reg = TPS6586X_SM0SL;
244 break;
245 case TPS6586X_ID_SM_1:
246 reg = TPS6586X_SM1SL;
247 break;
248 default:
249 dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
250 return -EINVAL;
251 }
252
253 return tps6586x_write(parent, reg,
254 setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
255 }
256
257 static inline struct tps6586x_regulator *find_regulator_info(int id)
258 {
259 struct tps6586x_regulator *ri;
260 int i;
261
262 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
263 ri = &tps6586x_regulator[i];
264 if (ri->desc.id == id)
265 return ri;
266 }
267 return NULL;
268 }
269
270 #ifdef CONFIG_OF
271 static struct of_regulator_match tps6586x_matches[] = {
272 { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },
273 { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
274 { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
275 { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
276 { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
277 { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
278 { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
279 { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
280 { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
281 { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
282 { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
283 { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
284 { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
285 { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
286 { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
287 };
288
289 static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
290 struct platform_device *pdev,
291 struct of_regulator_match **tps6586x_reg_matches)
292 {
293 const unsigned int num = ARRAY_SIZE(tps6586x_matches);
294 struct device_node *np = pdev->dev.parent->of_node;
295 struct device_node *regs;
296 const char *sys_rail = NULL;
297 unsigned int i;
298 struct tps6586x_platform_data *pdata;
299 int err;
300
301 regs = of_find_node_by_name(np, "regulators");
302 if (!regs) {
303 dev_err(&pdev->dev, "regulator node not found\n");
304 return NULL;
305 }
306
307 err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num);
308 of_node_put(regs);
309 if (err < 0) {
310 dev_err(&pdev->dev, "Regulator match failed, e %d\n", err);
311 return NULL;
312 }
313
314 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
315 if (!pdata) {
316 dev_err(&pdev->dev, "Memory alloction failed\n");
317 return NULL;
318 }
319
320 for (i = 0; i < num; i++) {
321 int id;
322 if (!tps6586x_matches[i].init_data)
323 continue;
324
325 pdata->reg_init_data[i] = tps6586x_matches[i].init_data;
326 id = (int)tps6586x_matches[i].driver_data;
327 if (id == TPS6586X_ID_SYS)
328 sys_rail = pdata->reg_init_data[i]->constraints.name;
329
330 if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC))
331 pdata->reg_init_data[i]->supply_regulator = sys_rail;
332 }
333 *tps6586x_reg_matches = tps6586x_matches;
334 return pdata;
335 }
336 #else
337 static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
338 struct platform_device *pdev,
339 struct of_regulator_match **tps6586x_reg_matches)
340 {
341 *tps6586x_reg_matches = NULL;
342 return NULL;
343 }
344 #endif
345
346 static int tps6586x_regulator_probe(struct platform_device *pdev)
347 {
348 struct tps6586x_regulator *ri = NULL;
349 struct regulator_config config = { };
350 struct regulator_dev **rdev;
351 struct regulator_init_data *reg_data;
352 struct tps6586x_platform_data *pdata;
353 struct of_regulator_match *tps6586x_reg_matches = NULL;
354 int id;
355 int err;
356
357 dev_dbg(&pdev->dev, "Probing regulator\n");
358
359 pdata = dev_get_platdata(pdev->dev.parent);
360 if ((!pdata) && (pdev->dev.parent->of_node))
361 pdata = tps6586x_parse_regulator_dt(pdev,
362 &tps6586x_reg_matches);
363
364 if (!pdata) {
365 dev_err(&pdev->dev, "Platform data not available, exiting\n");
366 return -ENODEV;
367 }
368
369 rdev = devm_kzalloc(&pdev->dev, TPS6586X_ID_MAX_REGULATOR *
370 sizeof(*rdev), GFP_KERNEL);
371 if (!rdev) {
372 dev_err(&pdev->dev, "Mmemory alloc failed\n");
373 return -ENOMEM;
374 }
375
376 for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) {
377 reg_data = pdata->reg_init_data[id];
378
379 ri = find_regulator_info(id);
380 if (!ri) {
381 dev_err(&pdev->dev, "invalid regulator ID specified\n");
382 err = -EINVAL;
383 goto fail;
384 }
385
386 err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
387 if (err) {
388 dev_err(&pdev->dev,
389 "regulator %d preinit failed, e %d\n", id, err);
390 goto fail;
391 }
392
393 config.dev = pdev->dev.parent;
394 config.init_data = reg_data;
395 config.driver_data = ri;
396
397 if (tps6586x_reg_matches)
398 config.of_node = tps6586x_reg_matches[id].of_node;
399
400 rdev[id] = regulator_register(&ri->desc, &config);
401 if (IS_ERR(rdev[id])) {
402 dev_err(&pdev->dev, "failed to register regulator %s\n",
403 ri->desc.name);
404 err = PTR_ERR(rdev[id]);
405 goto fail;
406 }
407
408 if (reg_data) {
409 err = tps6586x_regulator_set_slew_rate(pdev, id,
410 reg_data);
411 if (err < 0) {
412 dev_err(&pdev->dev,
413 "Slew rate config failed, e %d\n", err);
414 regulator_unregister(rdev[id]);
415 goto fail;
416 }
417 }
418 }
419
420 platform_set_drvdata(pdev, rdev);
421 return 0;
422
423 fail:
424 while (--id >= 0)
425 regulator_unregister(rdev[id]);
426 return err;
427 }
428
429 static int tps6586x_regulator_remove(struct platform_device *pdev)
430 {
431 struct regulator_dev **rdev = platform_get_drvdata(pdev);
432 int id = TPS6586X_ID_MAX_REGULATOR;
433
434 while (--id >= 0)
435 regulator_unregister(rdev[id]);
436
437 return 0;
438 }
439
440 static struct platform_driver tps6586x_regulator_driver = {
441 .driver = {
442 .name = "tps6586x-regulator",
443 .owner = THIS_MODULE,
444 },
445 .probe = tps6586x_regulator_probe,
446 .remove = tps6586x_regulator_remove,
447 };
448
449 static int __init tps6586x_regulator_init(void)
450 {
451 return platform_driver_register(&tps6586x_regulator_driver);
452 }
453 subsys_initcall(tps6586x_regulator_init);
454
455 static void __exit tps6586x_regulator_exit(void)
456 {
457 platform_driver_unregister(&tps6586x_regulator_driver);
458 }
459 module_exit(tps6586x_regulator_exit);
460
461 MODULE_LICENSE("GPL");
462 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
463 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
464 MODULE_ALIAS("platform:tps6586x-regulator");
Linux with added FPC-III support