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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 MR |
16 | #include <linux/kernel.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/regulator/driver.h> | |
22 | #include <linux/regulator/machine.h> | |
23 | #include <linux/mfd/tps6586x.h> | |
24 | ||
25 | /* supply control and voltage setting */ | |
26 | #define TPS6586X_SUPPLYENA 0x10 | |
27 | #define TPS6586X_SUPPLYENB 0x11 | |
28 | #define TPS6586X_SUPPLYENC 0x12 | |
29 | #define TPS6586X_SUPPLYEND 0x13 | |
30 | #define TPS6586X_SUPPLYENE 0x14 | |
31 | #define TPS6586X_VCC1 0x20 | |
32 | #define TPS6586X_VCC2 0x21 | |
33 | #define TPS6586X_SM1V1 0x23 | |
34 | #define TPS6586X_SM1V2 0x24 | |
35 | #define TPS6586X_SM1SL 0x25 | |
36 | #define TPS6586X_SM0V1 0x26 | |
37 | #define TPS6586X_SM0V2 0x27 | |
38 | #define TPS6586X_SM0SL 0x28 | |
39 | #define TPS6586X_LDO2AV1 0x29 | |
40 | #define TPS6586X_LDO2AV2 0x2A | |
41 | #define TPS6586X_LDO2BV1 0x2F | |
42 | #define TPS6586X_LDO2BV2 0x30 | |
43 | #define TPS6586X_LDO4V1 0x32 | |
44 | #define TPS6586X_LDO4V2 0x33 | |
45 | ||
46 | /* converter settings */ | |
47 | #define TPS6586X_SUPPLYV1 0x41 | |
48 | #define TPS6586X_SUPPLYV2 0x42 | |
49 | #define TPS6586X_SUPPLYV3 0x43 | |
50 | #define TPS6586X_SUPPLYV4 0x44 | |
51 | #define TPS6586X_SUPPLYV5 0x45 | |
52 | #define TPS6586X_SUPPLYV6 0x46 | |
53 | #define TPS6586X_SMODE1 0x47 | |
54 | #define TPS6586X_SMODE2 0x48 | |
55 | ||
56 | struct tps6586x_regulator { | |
57 | struct regulator_desc desc; | |
58 | ||
59 | int volt_reg; | |
60 | int volt_shift; | |
61 | int volt_nbits; | |
62 | int enable_bit[2]; | |
63 | int enable_reg[2]; | |
64 | ||
65 | int *voltages; | |
66 | ||
67 | /* for DVM regulators */ | |
68 | int go_reg; | |
69 | int go_bit; | |
70 | }; | |
71 | ||
72 | static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) | |
73 | { | |
74 | return rdev_get_dev(rdev)->parent->parent; | |
75 | } | |
76 | ||
77 | static int tps6586x_ldo_list_voltage(struct regulator_dev *rdev, | |
78 | unsigned selector) | |
79 | { | |
80 | struct tps6586x_regulator *info = rdev_get_drvdata(rdev); | |
81 | ||
4cc2e393 | 82 | return info->voltages[selector] * 1000; |
49610235 MR |
83 | } |
84 | ||
85 | ||
86 | static int __tps6586x_ldo_set_voltage(struct device *parent, | |
87 | struct tps6586x_regulator *ri, | |
88 | int min_uV, int max_uV) | |
89 | { | |
90 | int val, uV; | |
91 | uint8_t mask; | |
92 | ||
93 | for (val = 0; val < ri->desc.n_voltages; val++) { | |
94 | uV = ri->voltages[val] * 1000; | |
95 | ||
96 | /* LDO0 has minimal voltage 1.2 rather than 1.25 */ | |
97 | if (ri->desc.id == TPS6586X_ID_LDO_0 && val == 0) | |
98 | uV -= 50 * 1000; | |
99 | ||
100 | /* use the first in-range value */ | |
101 | if (min_uV <= uV && uV <= max_uV) { | |
102 | ||
103 | val <<= ri->volt_shift; | |
104 | mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; | |
105 | ||
106 | return tps6586x_update(parent, ri->volt_reg, val, mask); | |
107 | } | |
108 | } | |
109 | ||
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | static int tps6586x_ldo_set_voltage(struct regulator_dev *rdev, | |
114 | int min_uV, int max_uV) | |
115 | { | |
116 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
117 | struct device *parent = to_tps6586x_dev(rdev); | |
118 | ||
119 | return __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV); | |
120 | } | |
121 | ||
122 | static int tps6586x_ldo_get_voltage(struct regulator_dev *rdev) | |
123 | { | |
124 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
125 | struct device *parent = to_tps6586x_dev(rdev); | |
126 | uint8_t val, mask; | |
127 | int ret; | |
128 | ||
129 | ret = tps6586x_read(parent, ri->volt_reg, &val); | |
130 | if (ret) | |
131 | return ret; | |
132 | ||
133 | mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift; | |
134 | val = (val & mask) >> ri->volt_shift; | |
135 | ||
136 | if (val > ri->desc.n_voltages) | |
137 | BUG(); | |
138 | ||
4cc2e393 | 139 | return ri->voltages[val] * 1000; |
49610235 MR |
140 | } |
141 | ||
142 | static int tps6586x_dvm_set_voltage(struct regulator_dev *rdev, | |
143 | int min_uV, int max_uV) | |
144 | { | |
145 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
146 | struct device *parent = to_tps6586x_dev(rdev); | |
147 | int ret; | |
148 | ||
149 | ret = __tps6586x_ldo_set_voltage(parent, ri, min_uV, max_uV); | |
150 | if (ret) | |
151 | return ret; | |
152 | ||
153 | return tps6586x_set_bits(parent, ri->go_reg, ri->go_bit); | |
154 | } | |
155 | ||
156 | static int tps6586x_regulator_enable(struct regulator_dev *rdev) | |
157 | { | |
158 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
159 | struct device *parent = to_tps6586x_dev(rdev); | |
160 | ||
161 | return tps6586x_set_bits(parent, ri->enable_reg[0], | |
162 | 1 << ri->enable_bit[0]); | |
163 | } | |
164 | ||
165 | static int tps6586x_regulator_disable(struct regulator_dev *rdev) | |
166 | { | |
167 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
168 | struct device *parent = to_tps6586x_dev(rdev); | |
169 | ||
170 | return tps6586x_clr_bits(parent, ri->enable_reg[0], | |
171 | 1 << ri->enable_bit[0]); | |
172 | } | |
173 | ||
174 | static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev) | |
175 | { | |
176 | struct tps6586x_regulator *ri = rdev_get_drvdata(rdev); | |
177 | struct device *parent = to_tps6586x_dev(rdev); | |
178 | uint8_t reg_val; | |
179 | int ret; | |
180 | ||
181 | ret = tps6586x_read(parent, ri->enable_reg[0], ®_val); | |
182 | if (ret) | |
183 | return ret; | |
184 | ||
185 | return !!(reg_val & (1 << ri->enable_bit[0])); | |
186 | } | |
187 | ||
188 | static struct regulator_ops tps6586x_regulator_ldo_ops = { | |
189 | .list_voltage = tps6586x_ldo_list_voltage, | |
190 | .get_voltage = tps6586x_ldo_get_voltage, | |
191 | .set_voltage = tps6586x_ldo_set_voltage, | |
192 | ||
193 | .is_enabled = tps6586x_regulator_is_enabled, | |
194 | .enable = tps6586x_regulator_enable, | |
195 | .disable = tps6586x_regulator_disable, | |
196 | }; | |
197 | ||
198 | static struct regulator_ops tps6586x_regulator_dvm_ops = { | |
199 | .list_voltage = tps6586x_ldo_list_voltage, | |
200 | .get_voltage = tps6586x_ldo_get_voltage, | |
201 | .set_voltage = tps6586x_dvm_set_voltage, | |
202 | ||
203 | .is_enabled = tps6586x_regulator_is_enabled, | |
204 | .enable = tps6586x_regulator_enable, | |
205 | .disable = tps6586x_regulator_disable, | |
206 | }; | |
207 | ||
208 | static int tps6586x_ldo_voltages[] = { | |
209 | 1250, 1500, 1800, 2500, 2700, 2850, 3100, 3300, | |
210 | }; | |
211 | ||
212 | static int tps6586x_ldo4_voltages[] = { | |
213 | 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875, | |
214 | 1900, 1925, 1950, 1975, 2000, 2025, 2050, 2075, | |
215 | 2100, 2125, 2150, 2175, 2200, 2225, 2250, 2275, | |
216 | 2300, 2325, 2350, 2375, 2400, 2425, 2450, 2475, | |
217 | }; | |
218 | ||
4cc2e393 GK |
219 | static int tps6586x_sm2_voltages[] = { |
220 | 3000, 3050, 3100, 3150, 3200, 3250, 3300, 3350, | |
221 | 3400, 3450, 3500, 3550, 3600, 3650, 3700, 3750, | |
222 | 3800, 3850, 3900, 3950, 4000, 4050, 4100, 4150, | |
223 | 4200, 4250, 4300, 4350, 4400, 4450, 4500, 4550, | |
224 | }; | |
225 | ||
49610235 MR |
226 | static int tps6586x_dvm_voltages[] = { |
227 | 725, 750, 775, 800, 825, 850, 875, 900, | |
228 | 925, 950, 975, 1000, 1025, 1050, 1075, 1100, | |
229 | 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300, | |
230 | 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500, | |
231 | }; | |
232 | ||
233 | #define TPS6586X_REGULATOR(_id, vdata, _ops, vreg, shift, nbits, \ | |
234 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ | |
235 | { \ | |
236 | .desc = { \ | |
237 | .name = "REG-" #_id, \ | |
238 | .ops = &tps6586x_regulator_##_ops, \ | |
239 | .type = REGULATOR_VOLTAGE, \ | |
240 | .id = TPS6586X_ID_##_id, \ | |
241 | .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ | |
242 | .owner = THIS_MODULE, \ | |
243 | }, \ | |
244 | .volt_reg = TPS6586X_##vreg, \ | |
245 | .volt_shift = (shift), \ | |
246 | .volt_nbits = (nbits), \ | |
247 | .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ | |
248 | .enable_bit[0] = (ebit0), \ | |
249 | .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ | |
250 | .enable_bit[1] = (ebit1), \ | |
251 | .voltages = tps6586x_##vdata##_voltages, \ | |
252 | } | |
253 | ||
254 | #define TPS6586X_LDO(_id, vdata, vreg, shift, nbits, \ | |
255 | ereg0, ebit0, ereg1, ebit1) \ | |
256 | TPS6586X_REGULATOR(_id, vdata, ldo_ops, vreg, shift, nbits, \ | |
257 | ereg0, ebit0, ereg1, ebit1, 0, 0) | |
258 | ||
259 | #define TPS6586X_DVM(_id, vdata, vreg, shift, nbits, \ | |
260 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ | |
261 | TPS6586X_REGULATOR(_id, vdata, dvm_ops, vreg, shift, nbits, \ | |
262 | ereg0, ebit0, ereg1, ebit1, goreg, gobit) | |
263 | ||
264 | static struct tps6586x_regulator tps6586x_regulator[] = { | |
265 | TPS6586X_LDO(LDO_0, ldo, SUPPLYV1, 5, 3, ENC, 0, END, 0), | |
266 | TPS6586X_LDO(LDO_3, ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), | |
267 | TPS6586X_LDO(LDO_5, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), | |
268 | TPS6586X_LDO(LDO_6, ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), | |
269 | TPS6586X_LDO(LDO_7, ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), | |
270 | TPS6586X_LDO(LDO_8, ldo, SUPPLYV1, 5, 3, ENC, 6, END, 6), | |
271 | TPS6586X_LDO(LDO_9, ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), | |
272 | TPS6586X_LDO(LDO_RTC, ldo, SUPPLYV4, 3, 3, ENE, 7, ENE, 7), | |
273 | TPS6586X_LDO(LDO_1, dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), | |
4cc2e393 | 274 | TPS6586X_LDO(SM_2, sm2, SUPPLYV2, 0, 5, ENC, 1, END, 1), |
49610235 MR |
275 | |
276 | TPS6586X_DVM(LDO_2, dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, VCC2, 6), | |
277 | TPS6586X_DVM(LDO_4, ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, VCC1, 6), | |
278 | TPS6586X_DVM(SM_0, dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, VCC1, 2), | |
279 | TPS6586X_DVM(SM_1, dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, VCC1, 0), | |
280 | }; | |
281 | ||
282 | /* | |
283 | * TPS6586X has 2 enable bits that are OR'ed to determine the actual | |
284 | * regulator state. Clearing one of this bits allows switching | |
285 | * regulator on and of with single register write. | |
286 | */ | |
287 | static inline int tps6586x_regulator_preinit(struct device *parent, | |
288 | struct tps6586x_regulator *ri) | |
289 | { | |
290 | uint8_t val1, val2; | |
291 | int ret; | |
292 | ||
293 | ret = tps6586x_read(parent, ri->enable_reg[0], &val1); | |
294 | if (ret) | |
295 | return ret; | |
296 | ||
297 | ret = tps6586x_read(parent, ri->enable_reg[1], &val2); | |
298 | if (ret) | |
299 | return ret; | |
300 | ||
301 | if (!(val2 & ri->enable_bit[1])) | |
302 | return 0; | |
303 | ||
304 | /* | |
305 | * The regulator is on, but it's enabled with the bit we don't | |
306 | * want to use, so we switch the enable bits | |
307 | */ | |
308 | if (!(val1 & ri->enable_bit[0])) { | |
309 | ret = tps6586x_set_bits(parent, ri->enable_reg[0], | |
310 | 1 << ri->enable_bit[0]); | |
311 | if (ret) | |
312 | return ret; | |
313 | } | |
314 | ||
315 | return tps6586x_clr_bits(parent, ri->enable_reg[1], | |
316 | 1 << ri->enable_bit[1]); | |
317 | } | |
318 | ||
319 | static inline struct tps6586x_regulator *find_regulator_info(int id) | |
320 | { | |
321 | struct tps6586x_regulator *ri; | |
322 | int i; | |
323 | ||
324 | for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { | |
325 | ri = &tps6586x_regulator[i]; | |
326 | if (ri->desc.id == id) | |
327 | return ri; | |
328 | } | |
329 | return NULL; | |
330 | } | |
331 | ||
332 | static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) | |
333 | { | |
334 | struct tps6586x_regulator *ri = NULL; | |
335 | struct regulator_dev *rdev; | |
336 | int id = pdev->id; | |
337 | int err; | |
338 | ||
339 | dev_dbg(&pdev->dev, "Probing reulator %d\n", id); | |
340 | ||
341 | ri = find_regulator_info(id); | |
342 | if (ri == NULL) { | |
343 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | err = tps6586x_regulator_preinit(pdev->dev.parent, ri); | |
348 | if (err) | |
349 | return err; | |
350 | ||
351 | rdev = regulator_register(&ri->desc, &pdev->dev, | |
352 | pdev->dev.platform_data, ri); | |
353 | if (IS_ERR(rdev)) { | |
354 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
355 | ri->desc.name); | |
356 | return PTR_ERR(rdev); | |
357 | } | |
358 | ||
e7973c3c | 359 | platform_set_drvdata(pdev, rdev); |
49610235 MR |
360 | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static int __devexit tps6586x_regulator_remove(struct platform_device *pdev) | |
365 | { | |
e7973c3c AL |
366 | struct regulator_dev *rdev = platform_get_drvdata(pdev); |
367 | ||
368 | regulator_unregister(rdev); | |
49610235 MR |
369 | return 0; |
370 | } | |
371 | ||
372 | static struct platform_driver tps6586x_regulator_driver = { | |
373 | .driver = { | |
374 | .name = "tps6586x-regulator", | |
375 | .owner = THIS_MODULE, | |
376 | }, | |
377 | .probe = tps6586x_regulator_probe, | |
378 | .remove = __devexit_p(tps6586x_regulator_remove), | |
379 | }; | |
380 | ||
381 | static int __init tps6586x_regulator_init(void) | |
382 | { | |
383 | return platform_driver_register(&tps6586x_regulator_driver); | |
384 | } | |
385 | subsys_initcall(tps6586x_regulator_init); | |
386 | ||
387 | static void __exit tps6586x_regulator_exit(void) | |
388 | { | |
389 | platform_driver_unregister(&tps6586x_regulator_driver); | |
390 | } | |
391 | module_exit(tps6586x_regulator_exit); | |
392 | ||
393 | MODULE_LICENSE("GPL"); | |
394 | MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); | |
395 | MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); | |
396 | MODULE_ALIAS("platform:tps6586x-regulator"); |