Commit | Line | Data |
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49610235 MR |
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 | ||
49610235 | 16 | #include <linux/kernel.h> |
65602c32 | 17 | #include <linux/module.h> |
49610235 MR |
18 | #include <linux/init.h> |
19 | #include <linux/err.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/regulator/driver.h> | |
23 | #include <linux/regulator/machine.h> | |
24 | #include <linux/mfd/tps6586x.h> | |
25 | ||
26 | /* supply control and voltage setting */ | |
27 | #define TPS6586X_SUPPLYENA 0x10 | |
28 | #define TPS6586X_SUPPLYENB 0x11 | |
29 | #define TPS6586X_SUPPLYENC 0x12 | |
30 | #define TPS6586X_SUPPLYEND 0x13 | |
31 | #define TPS6586X_SUPPLYENE 0x14 | |
32 | #define TPS6586X_VCC1 0x20 | |
33 | #define TPS6586X_VCC2 0x21 | |
34 | #define TPS6586X_SM1V1 0x23 | |
35 | #define TPS6586X_SM1V2 0x24 | |
36 | #define TPS6586X_SM1SL 0x25 | |
37 | #define TPS6586X_SM0V1 0x26 | |
38 | #define TPS6586X_SM0V2 0x27 | |
39 | #define TPS6586X_SM0SL 0x28 | |
40 | #define TPS6586X_LDO2AV1 0x29 | |
41 | #define TPS6586X_LDO2AV2 0x2A | |
42 | #define TPS6586X_LDO2BV1 0x2F | |
43 | #define TPS6586X_LDO2BV2 0x30 | |
44 | #define TPS6586X_LDO4V1 0x32 | |
45 | #define TPS6586X_LDO4V2 0x33 | |
46 | ||
47 | /* converter settings */ | |
48 | #define TPS6586X_SUPPLYV1 0x41 | |
49 | #define TPS6586X_SUPPLYV2 0x42 | |
50 | #define TPS6586X_SUPPLYV3 0x43 | |
51 | #define TPS6586X_SUPPLYV4 0x44 | |
52 | #define TPS6586X_SUPPLYV5 0x45 | |
53 | #define TPS6586X_SUPPLYV6 0x46 | |
54 | #define TPS6586X_SMODE1 0x47 | |
55 | #define TPS6586X_SMODE2 0x48 | |
56 | ||
57 | struct tps6586x_regulator { | |
58 | struct regulator_desc desc; | |
59 | ||
60 | int volt_reg; | |
61 | int volt_shift; | |
62 | int volt_nbits; | |
63 | int enable_bit[2]; | |
64 | int enable_reg[2]; | |
65 | ||
49610235 MR |
66 | /* for DVM regulators */ |
67 | int go_reg; | |
68 | int go_bit; | |
69 | }; | |
70 | ||
71 | static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) | |
72 | { | |
7c7fac30 | 73 | return rdev_get_dev(rdev)->parent; |
49610235 MR |
74 | } |
75 | ||
eed06517 AL |
76 | static int tps6586x_set_voltage_sel(struct regulator_dev *rdev, |
77 | unsigned selector) | |
49610235 | 78 | { |
eed06517 AL |
79 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); |
80 | struct device *parent = to_tps6586x_dev(rdev); | |
81 | int ret, val, rid = rdev_get_id(rdev); | |
49610235 MR |
82 | uint8_t mask; |
83 | ||
eed06517 AL |
84 | val = selector << ri->volt_shift; |
85 | mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; | |
3a93f2a9 | 86 | |
eed06517 AL |
87 | ret = tps6586x_update(parent, ri->volt_reg, val, mask); |
88 | if (ret) | |
89 | return ret; | |
49610235 | 90 | |
eed06517 AL |
91 | /* Update go bit for DVM regulators */ |
92 | switch (rid) { | |
93 | case TPS6586X_ID_LDO_2: | |
94 | case TPS6586X_ID_LDO_4: | |
95 | case TPS6586X_ID_SM_0: | |
96 | case TPS6586X_ID_SM_1: | |
97 | ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit); | |
98 | break; | |
49610235 | 99 | } |
eed06517 | 100 | return ret; |
49610235 MR |
101 | } |
102 | ||
44a7cdab | 103 | static int tps6586x_get_voltage_sel(struct regulator_dev *rdev) |
49610235 MR |
104 | { |
105 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
106 | struct device *parent = to_tps6586x_dev(rdev); | |
107 | uint8_t val, mask; | |
108 | int ret; | |
109 | ||
110 | ret = tps6586x_read(parent, ri->volt_reg, &val); | |
111 | if (ret) | |
112 | return ret; | |
113 | ||
114 | mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; | |
115 | val = (val & mask) >> ri->volt_shift; | |
116 | ||
327531ba | 117 | if (val >= ri->desc.n_voltages) |
49610235 MR |
118 | BUG(); |
119 | ||
44a7cdab | 120 | return val; |
49610235 MR |
121 | } |
122 | ||
49610235 MR |
123 | static int tps6586x_regulator_enable(struct regulator_dev *rdev) |
124 | { | |
125 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
126 | struct device *parent = to_tps6586x_dev(rdev); | |
127 | ||
128 | return tps6586x_set_bits(parent, ri->enable_reg[0], | |
129 | 1 << ri->enable_bit[0]); | |
130 | } | |
131 | ||
132 | static int tps6586x_regulator_disable(struct regulator_dev *rdev) | |
133 | { | |
134 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
135 | struct device *parent = to_tps6586x_dev(rdev); | |
136 | ||
137 | return tps6586x_clr_bits(parent, ri->enable_reg[0], | |
138 | 1 << ri->enable_bit[0]); | |
139 | } | |
140 | ||
141 | static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev) | |
142 | { | |
143 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
144 | struct device *parent = to_tps6586x_dev(rdev); | |
145 | uint8_t reg_val; | |
146 | int ret; | |
147 | ||
148 | ret = tps6586x_read(parent, ri->enable_reg[0], ®_val); | |
149 | if (ret) | |
150 | return ret; | |
151 | ||
152 | return !!(reg_val & (1 << ri->enable_bit[0])); | |
153 | } | |
154 | ||
e1816235 | 155 | static struct regulator_ops tps6586x_regulator_ops = { |
f4647037 | 156 | .list_voltage = regulator_list_voltage_table, |
44a7cdab | 157 | .get_voltage_sel = tps6586x_get_voltage_sel, |
eed06517 | 158 | .set_voltage_sel = tps6586x_set_voltage_sel, |
49610235 MR |
159 | |
160 | .is_enabled = tps6586x_regulator_is_enabled, | |
161 | .enable = tps6586x_regulator_enable, | |
162 | .disable = tps6586x_regulator_disable, | |
163 | }; | |
164 | ||
f4647037 AL |
165 | static const unsigned int tps6586x_ldo0_voltages[] = { |
166 | 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, | |
167 | }; | |
168 | ||
169 | static const unsigned int tps6586x_ldo4_voltages[] = { | |
170 | 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000, | |
171 | 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000, | |
172 | 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000, | |
173 | 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000, | |
49610235 MR |
174 | }; |
175 | ||
f4647037 AL |
176 | static const unsigned int tps6586x_ldo_voltages[] = { |
177 | 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, | |
49610235 MR |
178 | }; |
179 | ||
f4647037 AL |
180 | static const unsigned int tps6586x_sm2_voltages[] = { |
181 | 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000, | |
182 | 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000, | |
183 | 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000, | |
184 | 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000, | |
4cc2e393 GK |
185 | }; |
186 | ||
f4647037 AL |
187 | static const unsigned int tps6586x_dvm_voltages[] = { |
188 | 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000, | |
189 | 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000, | |
190 | 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000, | |
191 | 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000, | |
49610235 MR |
192 | }; |
193 | ||
7c7fac30 | 194 | #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \ |
64db657b | 195 | ereg0, ebit0, ereg1, ebit1) \ |
49610235 | 196 | .desc = { \ |
7c7fac30 | 197 | .supply_name = _pin_name, \ |
49610235 | 198 | .name = "REG-" #_id, \ |
e1816235 | 199 | .ops = &tps6586x_regulator_ops, \ |
49610235 MR |
200 | .type = REGULATOR_VOLTAGE, \ |
201 | .id = TPS6586X_ID_##_id, \ | |
202 | .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ | |
f4647037 | 203 | .volt_table = tps6586x_##vdata##_voltages, \ |
49610235 MR |
204 | .owner = THIS_MODULE, \ |
205 | }, \ | |
206 | .volt_reg = TPS6586X_##vreg, \ | |
207 | .volt_shift = (shift), \ | |
208 | .volt_nbits = (nbits), \ | |
209 | .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ | |
210 | .enable_bit[0] = (ebit0), \ | |
211 | .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ | |
f4647037 | 212 | .enable_bit[1] = (ebit1), |
64db657b DH |
213 | |
214 | #define TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ | |
215 | .go_reg = TPS6586X_##goreg, \ | |
216 | .go_bit = (gobit), | |
49610235 | 217 | |
7c7fac30 | 218 | #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \ |
49610235 | 219 | ereg0, ebit0, ereg1, ebit1) \ |
64db657b | 220 | { \ |
7c7fac30 | 221 | TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ |
64db657b DH |
222 | ereg0, ebit0, ereg1, ebit1) \ |
223 | } | |
49610235 | 224 | |
7c7fac30 | 225 | #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \ |
49610235 | 226 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ |
64db657b | 227 | { \ |
7c7fac30 | 228 | TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ |
64db657b DH |
229 | ereg0, ebit0, ereg1, ebit1) \ |
230 | TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \ | |
231 | } | |
49610235 MR |
232 | |
233 | static struct tps6586x_regulator tps6586x_regulator[] = { | |
7c7fac30 LD |
234 | TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0), |
235 | TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), | |
236 | TPS6586X_LDO(LDO_5, NULL, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), | |
237 | TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), | |
238 | TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), | |
239 | TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6), | |
240 | TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), | |
241 | TPS6586X_LDO(LDO_RTC, NULL, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7), | |
242 | TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), | |
243 | TPS6586X_LDO(SM_2, "sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7), | |
244 | ||
245 | TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3, | |
246 | ENB, 3, VCC2, 6), | |
247 | TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3, | |
248 | END, 3, VCC1, 6), | |
249 | TPS6586X_DVM(SM_0, "sm0", dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2), | |
250 | TPS6586X_DVM(SM_1, "sm1", dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0), | |
49610235 MR |
251 | }; |
252 | ||
253 | /* | |
254 | * TPS6586X has 2 enable bits that are OR'ed to determine the actual | |
255 | * regulator state. Clearing one of this bits allows switching | |
256 | * regulator on and of with single register write. | |
257 | */ | |
258 | static inline int tps6586x_regulator_preinit(struct device *parent, | |
259 | struct tps6586x_regulator *ri) | |
260 | { | |
261 | uint8_t val1, val2; | |
262 | int ret; | |
263 | ||
1dbcf35c DH |
264 | if (ri->enable_reg[0] == ri->enable_reg[1] && |
265 | ri->enable_bit[0] == ri->enable_bit[1]) | |
266 | return 0; | |
267 | ||
49610235 MR |
268 | ret = tps6586x_read(parent, ri->enable_reg[0], &val1); |
269 | if (ret) | |
270 | return ret; | |
271 | ||
272 | ret = tps6586x_read(parent, ri->enable_reg[1], &val2); | |
273 | if (ret) | |
274 | return ret; | |
275 | ||
4f586707 | 276 | if (!(val2 & (1 << ri->enable_bit[1]))) |
49610235 MR |
277 | return 0; |
278 | ||
279 | /* | |
280 | * The regulator is on, but it's enabled with the bit we don't | |
281 | * want to use, so we switch the enable bits | |
282 | */ | |
4f586707 | 283 | if (!(val1 & (1 << ri->enable_bit[0]))) { |
49610235 MR |
284 | ret = tps6586x_set_bits(parent, ri->enable_reg[0], |
285 | 1 << ri->enable_bit[0]); | |
286 | if (ret) | |
287 | return ret; | |
288 | } | |
289 | ||
290 | return tps6586x_clr_bits(parent, ri->enable_reg[1], | |
291 | 1 << ri->enable_bit[1]); | |
292 | } | |
293 | ||
500c524a XX |
294 | static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev) |
295 | { | |
296 | struct device *parent = pdev->dev.parent; | |
297 | struct regulator_init_data *p = pdev->dev.platform_data; | |
298 | struct tps6586x_settings *setting = p->driver_data; | |
299 | uint8_t reg; | |
300 | ||
301 | if (setting == NULL) | |
302 | return 0; | |
303 | ||
304 | if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) | |
305 | return 0; | |
306 | ||
307 | /* only SM0 and SM1 can have the slew rate settings */ | |
308 | switch (pdev->id) { | |
309 | case TPS6586X_ID_SM_0: | |
310 | reg = TPS6586X_SM0SL; | |
311 | break; | |
312 | case TPS6586X_ID_SM_1: | |
313 | reg = TPS6586X_SM1SL; | |
314 | break; | |
315 | default: | |
316 | dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); | |
317 | return -EINVAL; | |
318 | } | |
319 | ||
320 | return tps6586x_write(parent, reg, | |
321 | setting->slew_rate & TPS6586X_SLEW_RATE_MASK); | |
322 | } | |
323 | ||
49610235 MR |
324 | static inline struct tps6586x_regulator *find_regulator_info(int id) |
325 | { | |
326 | struct tps6586x_regulator *ri; | |
327 | int i; | |
328 | ||
329 | for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { | |
330 | ri = &tps6586x_regulator[i]; | |
331 | if (ri->desc.id == id) | |
332 | return ri; | |
333 | } | |
334 | return NULL; | |
335 | } | |
336 | ||
337 | static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) | |
338 | { | |
339 | struct tps6586x_regulator *ri = NULL; | |
c172708d | 340 | struct regulator_config config = { }; |
49610235 MR |
341 | struct regulator_dev *rdev; |
342 | int id = pdev->id; | |
343 | int err; | |
344 | ||
394ee3d5 | 345 | dev_dbg(&pdev->dev, "Probing regulator %d\n", id); |
49610235 MR |
346 | |
347 | ri = find_regulator_info(id); | |
348 | if (ri == NULL) { | |
349 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | |
350 | return -EINVAL; | |
351 | } | |
352 | ||
353 | err = tps6586x_regulator_preinit(pdev->dev.parent, ri); | |
354 | if (err) | |
355 | return err; | |
356 | ||
7c7fac30 | 357 | config.dev = pdev->dev.parent; |
62f6b087 | 358 | config.of_node = pdev->dev.of_node; |
c172708d MB |
359 | config.init_data = pdev->dev.platform_data; |
360 | config.driver_data = ri; | |
361 | ||
362 | rdev = regulator_register(&ri->desc, &config); | |
49610235 MR |
363 | if (IS_ERR(rdev)) { |
364 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
365 | ri->desc.name); | |
366 | return PTR_ERR(rdev); | |
367 | } | |
368 | ||
e7973c3c | 369 | platform_set_drvdata(pdev, rdev); |
49610235 | 370 | |
500c524a | 371 | return tps6586x_regulator_set_slew_rate(pdev); |
49610235 MR |
372 | } |
373 | ||
374 | static int __devexit tps6586x_regulator_remove(struct platform_device *pdev) | |
375 | { | |
e7973c3c AL |
376 | struct regulator_dev *rdev = platform_get_drvdata(pdev); |
377 | ||
378 | regulator_unregister(rdev); | |
49610235 MR |
379 | return 0; |
380 | } | |
381 | ||
382 | static struct platform_driver tps6586x_regulator_driver = { | |
383 | .driver = { | |
384 | .name = "tps6586x-regulator", | |
385 | .owner = THIS_MODULE, | |
386 | }, | |
387 | .probe = tps6586x_regulator_probe, | |
388 | .remove = __devexit_p(tps6586x_regulator_remove), | |
389 | }; | |
390 | ||
391 | static int __init tps6586x_regulator_init(void) | |
392 | { | |
393 | return platform_driver_register(&tps6586x_regulator_driver); | |
394 | } | |
395 | subsys_initcall(tps6586x_regulator_init); | |
396 | ||
397 | static void __exit tps6586x_regulator_exit(void) | |
398 | { | |
399 | platform_driver_unregister(&tps6586x_regulator_driver); | |
400 | } | |
401 | module_exit(tps6586x_regulator_exit); | |
402 | ||
403 | MODULE_LICENSE("GPL"); | |
404 | MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); | |
405 | MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); | |
406 | MODULE_ALIAS("platform:tps6586x-regulator"); |