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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 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
74 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
75 | |
76 | .is_enabled = regulator_is_enabled_regmap, |
77 | .enable = regulator_enable_regmap, |
78 | .disable = regulator_disable_regmap, |
79 | }; |
80 | |
81 | static struct regulator_ops tps6586x_sys_regulator_ops = { |
82 | }; |
83 | |
84 | static const unsigned int tps6586x_ldo0_voltages[] = { |
85 | 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, |
86 | }; |
87 | |
88 | static const unsigned int tps6586x_ldo4_voltages[] = { |
89 | 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000, |
90 | 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000, |
91 | 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000, |
92 | 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000, |
93 | }; |
94 | |
95 | static const unsigned int tps6586x_ldo_voltages[] = { |
96 | 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, |
97 | }; |
98 | |
99 | static const unsigned int tps6586x_sm2_voltages[] = { |
100 | 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000, |
101 | 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000, |
102 | 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000, |
103 | 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000, |
104 | }; |
105 | |
106 | static const unsigned int tps6586x_dvm_voltages[] = { |
107 | 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000, |
108 | 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000, |
109 | 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000, |
110 | 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000, |
111 | }; |
112 | |
113 | #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \ |
114 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ |
115 | .desc = { \ |
116 | .supply_name = _pin_name, \ |
117 | .name = "REG-" #_id, \ |
118 | .ops = &tps6586x_regulator_ops, \ |
119 | .type = REGULATOR_VOLTAGE, \ |
120 | .id = TPS6586X_ID_##_id, \ |
121 | .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ |
122 | .volt_table = tps6586x_##vdata##_voltages, \ |
123 | .owner = THIS_MODULE, \ |
124 | .enable_reg = TPS6586X_SUPPLY##ereg0, \ |
125 | .enable_mask = 1 << (ebit0), \ |
126 | .vsel_reg = TPS6586X_##vreg, \ |
127 | .vsel_mask = ((1 << (nbits)) - 1) << (shift), \ |
128 | .apply_reg = (goreg), \ |
129 | .apply_bit = (gobit), \ |
130 | }, \ |
131 | .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ |
132 | .enable_bit[0] = (ebit0), \ |
133 | .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ |
134 | .enable_bit[1] = (ebit1), |
135 | |
136 | #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \ |
137 | ereg0, ebit0, ereg1, ebit1) \ |
138 | { \ |
139 | TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ |
140 | ereg0, ebit0, ereg1, ebit1, 0, 0) \ |
141 | } |
142 | |
143 | #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \ |
144 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ |
145 | { \ |
146 | TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ |
147 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ |
148 | } |
149 | |
150 | #define TPS6586X_SYS_REGULATOR() \ |
151 | { \ |
152 | .desc = { \ |
153 | .supply_name = "sys", \ |
154 | .name = "REG-SYS", \ |
155 | .ops = &tps6586x_sys_regulator_ops, \ |
156 | .type = REGULATOR_VOLTAGE, \ |
157 | .id = TPS6586X_ID_SYS, \ |
158 | .owner = THIS_MODULE, \ |
159 | }, \ |
160 | } |
161 | |
162 | static struct tps6586x_regulator tps6586x_regulator[] = { |
163 | TPS6586X_SYS_REGULATOR(), |
164 | TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0), |
165 | TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), |
166 | TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), |
167 | TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), |
168 | TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), |
169 | TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6), |
170 | TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), |
171 | TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7), |
172 | TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), |
173 | TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7), |
174 | |
175 | TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3, |
176 | ENB, 3, TPS6586X_VCC2, BIT(6)), |
177 | TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3, |
178 | END, 3, TPS6586X_VCC1, BIT(6)), |
179 | TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1, |
180 | ENB, 1, TPS6586X_VCC1, BIT(2)), |
181 | TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0, |
182 | ENB, 0, TPS6586X_VCC1, BIT(0)), |
183 | }; |
184 | |
185 | /* |
186 | * TPS6586X has 2 enable bits that are OR'ed to determine the actual |
187 | * regulator state. Clearing one of this bits allows switching |
188 | * regulator on and of with single register write. |
189 | */ |
190 | static inline int tps6586x_regulator_preinit(struct device *parent, |
191 | struct tps6586x_regulator *ri) |
192 | { |
193 | uint8_t val1, val2; |
194 | int ret; |
195 | |
196 | if (ri->enable_reg[0] == ri->enable_reg[1] && |
197 | ri->enable_bit[0] == ri->enable_bit[1]) |
198 | return 0; |
199 | |
200 | ret = tps6586x_read(parent, ri->enable_reg[0], &val1); |
201 | if (ret) |
202 | return ret; |
203 | |
204 | ret = tps6586x_read(parent, ri->enable_reg[1], &val2); |
205 | if (ret) |
206 | return ret; |
207 | |
208 | if (!(val2 & (1 << ri->enable_bit[1]))) |
209 | return 0; |
210 | |
211 | /* |
212 | * The regulator is on, but it's enabled with the bit we don't |
213 | * want to use, so we switch the enable bits |
214 | */ |
215 | if (!(val1 & (1 << ri->enable_bit[0]))) { |
216 | ret = tps6586x_set_bits(parent, ri->enable_reg[0], |
217 | 1 << ri->enable_bit[0]); |
218 | if (ret) |
219 | return ret; |
220 | } |
221 | |
222 | return tps6586x_clr_bits(parent, ri->enable_reg[1], |
223 | 1 << ri->enable_bit[1]); |
224 | } |
225 | |
226 | static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev, |
227 | int id, struct regulator_init_data *p) |
228 | { |
229 | struct device *parent = pdev->dev.parent; |
230 | struct tps6586x_settings *setting = p->driver_data; |
231 | uint8_t reg; |
232 | |
233 | if (setting == NULL) |
234 | return 0; |
235 | |
236 | if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) |
237 | return 0; |
238 | |
239 | /* only SM0 and SM1 can have the slew rate settings */ |
240 | switch (id) { |
241 | case TPS6586X_ID_SM_0: |
242 | reg = TPS6586X_SM0SL; |
243 | break; |
244 | case TPS6586X_ID_SM_1: |
245 | reg = TPS6586X_SM1SL; |
246 | break; |
247 | default: |
248 | dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); |
249 | return -EINVAL; |
250 | } |
251 | |
252 | return tps6586x_write(parent, reg, |
253 | setting->slew_rate & TPS6586X_SLEW_RATE_MASK); |
254 | } |
255 | |
256 | static inline struct tps6586x_regulator *find_regulator_info(int id) |
257 | { |
258 | struct tps6586x_regulator *ri; |
259 | int i; |
260 | |
261 | for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { |
262 | ri = &tps6586x_regulator[i]; |
263 | if (ri->desc.id == id) |
264 | return ri; |
265 | } |
266 | return NULL; |
267 | } |
268 | |
269 | #ifdef CONFIG_OF |
270 | static struct of_regulator_match tps6586x_matches[] = { |
271 | { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS }, |
272 | { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 }, |
273 | { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 }, |
274 | { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 }, |
275 | { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 }, |
276 | { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 }, |
277 | { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 }, |
278 | { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 }, |
279 | { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 }, |
280 | { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 }, |
281 | { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 }, |
282 | { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 }, |
283 | { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 }, |
284 | { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 }, |
285 | { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC }, |
286 | }; |
287 | |
288 | static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( |
289 | struct platform_device *pdev, |
290 | struct of_regulator_match **tps6586x_reg_matches) |
291 | { |
292 | const unsigned int num = ARRAY_SIZE(tps6586x_matches); |
293 | struct device_node *np = pdev->dev.parent->of_node; |
294 | struct device_node *regs; |
295 | const char *sys_rail = NULL; |
296 | unsigned int i; |
297 | struct tps6586x_platform_data *pdata; |
298 | int err; |
299 | |
300 | regs = of_find_node_by_name(np, "regulators"); |
301 | if (!regs) { |
302 | dev_err(&pdev->dev, "regulator node not found\n"); |
303 | return NULL; |
304 | } |
305 | |
306 | err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num); |
307 | if (err < 0) { |
308 | dev_err(&pdev->dev, "Regulator match failed, e %d\n", err); |
309 | of_node_put(regs); |
310 | return NULL; |
311 | } |
312 | |
313 | of_node_put(regs); |
314 | |
315 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
316 | if (!pdata) { |
317 | dev_err(&pdev->dev, "Memory alloction failed\n"); |
318 | return NULL; |
319 | } |
320 | |
321 | for (i = 0; i < num; i++) { |
322 | int id; |
323 | if (!tps6586x_matches[i].init_data) |
324 | continue; |
325 | |
326 | pdata->reg_init_data[i] = tps6586x_matches[i].init_data; |
327 | id = (int)tps6586x_matches[i].driver_data; |
328 | if (id == TPS6586X_ID_SYS) |
329 | sys_rail = pdata->reg_init_data[i]->constraints.name; |
330 | |
331 | if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC)) |
332 | pdata->reg_init_data[i]->supply_regulator = sys_rail; |
333 | } |
334 | *tps6586x_reg_matches = tps6586x_matches; |
335 | return pdata; |
336 | } |
337 | #else |
338 | static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( |
339 | struct platform_device *pdev, |
340 | struct of_regulator_match **tps6586x_reg_matches) |
341 | { |
342 | *tps6586x_reg_matches = NULL; |
343 | return NULL; |
344 | } |
345 | #endif |
346 | |
347 | static int tps6586x_regulator_probe(struct platform_device *pdev) |
348 | { |
349 | struct tps6586x_regulator *ri = NULL; |
350 | struct regulator_config config = { }; |
351 | struct regulator_dev **rdev; |
352 | struct regulator_init_data *reg_data; |
353 | struct tps6586x_platform_data *pdata; |
354 | struct of_regulator_match *tps6586x_reg_matches = NULL; |
355 | int id; |
356 | int err; |
357 | |
358 | dev_dbg(&pdev->dev, "Probing regulator\n"); |
359 | |
360 | pdata = dev_get_platdata(pdev->dev.parent); |
361 | if ((!pdata) && (pdev->dev.parent->of_node)) |
362 | pdata = tps6586x_parse_regulator_dt(pdev, |
363 | &tps6586x_reg_matches); |
364 | |
365 | if (!pdata) { |
366 | dev_err(&pdev->dev, "Platform data not available, exiting\n"); |
367 | return -ENODEV; |
368 | } |
369 | |
370 | rdev = devm_kzalloc(&pdev->dev, TPS6586X_ID_MAX_REGULATOR * |
371 | sizeof(*rdev), GFP_KERNEL); |
372 | if (!rdev) { |
373 | dev_err(&pdev->dev, "Mmemory alloc failed\n"); |
374 | return -ENOMEM; |
375 | } |
376 | |
377 | for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) { |
378 | reg_data = pdata->reg_init_data[id]; |
379 | |
380 | ri = find_regulator_info(id); |
381 | if (!ri) { |
382 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); |
383 | err = -EINVAL; |
384 | goto fail; |
385 | } |
386 | |
387 | err = tps6586x_regulator_preinit(pdev->dev.parent, ri); |
388 | if (err) { |
389 | dev_err(&pdev->dev, |
390 | "regulator %d preinit failed, e %d\n", id, err); |
391 | goto fail; |
392 | } |
393 | |
394 | config.dev = pdev->dev.parent; |
395 | config.init_data = reg_data; |
396 | config.driver_data = ri; |
397 | |
398 | if (tps6586x_reg_matches) |
399 | config.of_node = tps6586x_reg_matches[id].of_node; |
400 | |
401 | rdev[id] = regulator_register(&ri->desc, &config); |
402 | if (IS_ERR(rdev[id])) { |
403 | dev_err(&pdev->dev, "failed to register regulator %s\n", |
404 | ri->desc.name); |
405 | err = PTR_ERR(rdev[id]); |
406 | goto fail; |
407 | } |
408 | |
409 | if (reg_data) { |
410 | err = tps6586x_regulator_set_slew_rate(pdev, id, |
411 | reg_data); |
412 | if (err < 0) { |
413 | dev_err(&pdev->dev, |
414 | "Slew rate config failed, e %d\n", err); |
415 | regulator_unregister(rdev[id]); |
416 | goto fail; |
417 | } |
418 | } |
419 | } |
420 | |
421 | platform_set_drvdata(pdev, rdev); |
422 | return 0; |
423 | |
424 | fail: |
425 | while (--id >= 0) |
426 | regulator_unregister(rdev[id]); |
427 | return err; |
428 | } |
429 | |
430 | static int tps6586x_regulator_remove(struct platform_device *pdev) |
431 | { |
432 | struct regulator_dev **rdev = platform_get_drvdata(pdev); |
433 | int id = TPS6586X_ID_MAX_REGULATOR; |
434 | |
435 | while (--id >= 0) |
436 | regulator_unregister(rdev[id]); |
437 | |
438 | return 0; |
439 | } |
440 | |
441 | static struct platform_driver tps6586x_regulator_driver = { |
442 | .driver = { |
443 | .name = "tps6586x-pmic", |
444 | .owner = THIS_MODULE, |
445 | }, |
446 | .probe = tps6586x_regulator_probe, |
447 | .remove = tps6586x_regulator_remove, |
448 | }; |
449 | |
450 | static int __init tps6586x_regulator_init(void) |
451 | { |
452 | return platform_driver_register(&tps6586x_regulator_driver); |
453 | } |
454 | subsys_initcall(tps6586x_regulator_init); |
455 | |
456 | static void __exit tps6586x_regulator_exit(void) |
457 | { |
458 | platform_driver_unregister(&tps6586x_regulator_driver); |
459 | } |
460 | module_exit(tps6586x_regulator_exit); |
461 | |
462 | MODULE_LICENSE("GPL"); |
463 | MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); |
464 | MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); |
465 | MODULE_ALIAS("platform:tps6586x-regulator"); |
466 |
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