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1 | /* |
2 | * tps65217-regulator.c | |
3 | * | |
4 | * Regulator driver for TPS65217 PMIC | |
5 | * | |
6 | * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation version 2. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether express or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/platform_device.h> | |
24 | ||
25 | #include <linux/regulator/driver.h> | |
26 | #include <linux/regulator/machine.h> | |
27 | #include <linux/mfd/tps65217.h> | |
28 | ||
29 | #define TPS65217_REGULATOR(_name, _id, _ops, _n) \ | |
30 | { \ | |
31 | .name = _name, \ | |
32 | .id = _id, \ | |
33 | .ops = &_ops, \ | |
34 | .n_voltages = _n, \ | |
35 | .type = REGULATOR_VOLTAGE, \ | |
36 | .owner = THIS_MODULE, \ | |
37 | } \ | |
38 | ||
39 | #define TPS65217_INFO(_nm, _min, _max, _f1, _f2, _t, _n, _em, _vr, _vm) \ | |
40 | { \ | |
41 | .name = _nm, \ | |
42 | .min_uV = _min, \ | |
43 | .max_uV = _max, \ | |
44 | .vsel_to_uv = _f1, \ | |
45 | .uv_to_vsel = _f2, \ | |
46 | .table = _t, \ | |
47 | .table_len = _n, \ | |
48 | .enable_mask = _em, \ | |
49 | .set_vout_reg = _vr, \ | |
50 | .set_vout_mask = _vm, \ | |
51 | } | |
52 | ||
53 | static const int LDO1_VSEL_table[] = { | |
54 | 1000000, 1100000, 1200000, 1250000, | |
55 | 1300000, 1350000, 1400000, 1500000, | |
56 | 1600000, 1800000, 2500000, 2750000, | |
57 | 2800000, 3000000, 3100000, 3300000, | |
58 | }; | |
59 | ||
60 | static int tps65217_vsel_to_uv1(unsigned int vsel) | |
61 | { | |
62 | int uV = 0; | |
63 | ||
64 | if (vsel > 63) | |
65 | return -EINVAL; | |
66 | ||
67 | if (vsel <= 24) | |
68 | uV = vsel * 25000 + 900000; | |
69 | else if (vsel <= 52) | |
70 | uV = (vsel - 24) * 50000 + 1500000; | |
71 | else if (vsel < 56) | |
72 | uV = (vsel - 52) * 100000 + 2900000; | |
73 | else | |
74 | uV = 3300000; | |
75 | ||
76 | return uV; | |
77 | } | |
78 | ||
79 | static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel) | |
80 | { | |
81 | if ((uV < 0) && (uV > 3300000)) | |
82 | return -EINVAL; | |
83 | ||
84 | if (uV <= 1500000) | |
85 | *vsel = (uV - 875001) / 25000; | |
86 | else if (uV <= 2900000) | |
87 | *vsel = 24 + (uV - 1450001) / 50000; | |
88 | else if (uV < 3300000) | |
89 | *vsel = 52 + (uV - 2800001) / 100000; | |
90 | else | |
91 | *vsel = 56; | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int tps65217_vsel_to_uv2(unsigned int vsel) | |
97 | { | |
98 | int uV = 0; | |
99 | ||
100 | if (vsel > 31) | |
101 | return -EINVAL; | |
102 | ||
103 | if (vsel <= 8) | |
104 | uV = vsel * 50000 + 1500000; | |
105 | else if (vsel <= 13) | |
106 | uV = (vsel - 8) * 100000 + 1900000; | |
107 | else | |
108 | uV = (vsel - 13) * 50000 + 2400000; | |
109 | ||
110 | return uV; | |
111 | } | |
112 | ||
113 | static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel) | |
114 | { | |
115 | if ((uV < 0) && (uV > 3300000)) | |
116 | return -EINVAL; | |
117 | ||
118 | if (uV <= 1900000) | |
119 | *vsel = (uV - 1450001) / 50000; | |
120 | else if (uV <= 2400000) | |
121 | *vsel = 8 + (uV - 1800001) / 100000; | |
122 | else | |
123 | *vsel = 13 + (uV - 2350001) / 50000; | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | static struct tps_info tps65217_pmic_regs[] = { | |
129 | TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1, | |
130 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC1_EN, | |
131 | TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK), | |
132 | TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, | |
133 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC2_EN, | |
134 | TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK), | |
135 | TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, | |
136 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_DC3_EN, | |
137 | TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK), | |
138 | TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL, LDO1_VSEL_table, | |
139 | 16, TPS65217_ENABLE_LDO1_EN, TPS65217_REG_DEFLDO1, | |
140 | TPS65217_DEFLDO1_LDO1_MASK), | |
141 | TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, | |
142 | tps65217_uv_to_vsel1, NULL, 64, TPS65217_ENABLE_LDO2_EN, | |
143 | TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK), | |
144 | TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, | |
145 | tps65217_uv_to_vsel2, NULL, 32, | |
146 | TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, | |
147 | TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK), | |
148 | TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, | |
149 | tps65217_uv_to_vsel2, NULL, 32, | |
150 | TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, | |
151 | TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK), | |
152 | }; | |
153 | ||
154 | static int tps65217_pmic_dcdc_is_enabled(struct regulator_dev *dev) | |
155 | { | |
156 | int ret; | |
157 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
158 | unsigned int data, dcdc = rdev_get_id(dev); | |
159 | ||
160 | if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3) | |
161 | return -EINVAL; | |
162 | ||
163 | ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data); | |
164 | if (ret) | |
165 | return ret; | |
166 | ||
167 | return (data & tps->info[dcdc]->enable_mask) ? 1 : 0; | |
168 | } | |
169 | ||
170 | static int tps65217_pmic_ldo_is_enabled(struct regulator_dev *dev) | |
171 | { | |
172 | int ret; | |
173 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
174 | unsigned int data, ldo = rdev_get_id(dev); | |
175 | ||
176 | if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4) | |
177 | return -EINVAL; | |
178 | ||
179 | ret = tps65217_reg_read(tps, TPS65217_REG_ENABLE, &data); | |
180 | if (ret) | |
181 | return ret; | |
182 | ||
183 | return (data & tps->info[ldo]->enable_mask) ? 1 : 0; | |
184 | } | |
185 | ||
186 | static int tps65217_pmic_dcdc_enable(struct regulator_dev *dev) | |
187 | { | |
188 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
189 | unsigned int dcdc = rdev_get_id(dev); | |
190 | ||
191 | if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3) | |
192 | return -EINVAL; | |
193 | ||
194 | /* Enable the regulator and password protection is level 1 */ | |
195 | return tps65217_set_bits(tps, TPS65217_REG_ENABLE, | |
196 | tps->info[dcdc]->enable_mask, | |
197 | tps->info[dcdc]->enable_mask, | |
198 | TPS65217_PROTECT_L1); | |
199 | } | |
200 | ||
201 | static int tps65217_pmic_dcdc_disable(struct regulator_dev *dev) | |
202 | { | |
203 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
204 | unsigned int dcdc = rdev_get_id(dev); | |
205 | ||
206 | if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3) | |
207 | return -EINVAL; | |
208 | ||
209 | /* Disable the regulator and password protection is level 1 */ | |
210 | return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, | |
211 | tps->info[dcdc]->enable_mask, TPS65217_PROTECT_L1); | |
212 | } | |
213 | ||
214 | static int tps65217_pmic_ldo_enable(struct regulator_dev *dev) | |
215 | { | |
216 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
217 | unsigned int ldo = rdev_get_id(dev); | |
218 | ||
219 | if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4) | |
220 | return -EINVAL; | |
221 | ||
222 | /* Enable the regulator and password protection is level 1 */ | |
223 | return tps65217_set_bits(tps, TPS65217_REG_ENABLE, | |
224 | tps->info[ldo]->enable_mask, | |
225 | tps->info[ldo]->enable_mask, | |
226 | TPS65217_PROTECT_L1); | |
227 | } | |
228 | ||
229 | static int tps65217_pmic_ldo_disable(struct regulator_dev *dev) | |
230 | { | |
231 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
232 | unsigned int ldo = rdev_get_id(dev); | |
233 | ||
234 | if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4) | |
235 | return -EINVAL; | |
236 | ||
237 | /* Disable the regulator and password protection is level 1 */ | |
238 | return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, | |
239 | tps->info[ldo]->enable_mask, TPS65217_PROTECT_L1); | |
240 | } | |
241 | ||
242 | static int tps65217_pmic_dcdc_get_voltage_sel(struct regulator_dev *dev) | |
243 | { | |
244 | int ret; | |
245 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
246 | unsigned int selector, dcdc = rdev_get_id(dev); | |
247 | ||
248 | if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3) | |
249 | return -EINVAL; | |
250 | ||
251 | ret = tps65217_reg_read(tps, tps->info[dcdc]->set_vout_reg, &selector); | |
252 | if (ret) | |
253 | return ret; | |
254 | ||
255 | selector &= tps->info[dcdc]->set_vout_mask; | |
256 | ||
257 | return selector; | |
258 | } | |
259 | ||
260 | static int tps65217_pmic_dcdc_set_voltage(struct regulator_dev *dev, | |
261 | int min_uV, int max_uV, unsigned *selector) | |
262 | { | |
263 | int ret; | |
264 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
265 | unsigned int dcdc = rdev_get_id(dev); | |
266 | ||
267 | if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3) | |
268 | return -EINVAL; | |
269 | ||
270 | if (min_uV < tps->info[dcdc]->min_uV | |
271 | || min_uV > tps->info[dcdc]->max_uV) | |
272 | return -EINVAL; | |
273 | ||
274 | if (max_uV < tps->info[dcdc]->min_uV | |
275 | || max_uV > tps->info[dcdc]->max_uV) | |
276 | return -EINVAL; | |
277 | ||
278 | ret = tps->info[dcdc]->uv_to_vsel(min_uV, selector); | |
279 | if (ret) | |
280 | return ret; | |
281 | ||
282 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
283 | ret = tps65217_set_bits(tps, tps->info[dcdc]->set_vout_reg, | |
284 | tps->info[dcdc]->set_vout_mask, | |
285 | *selector, TPS65217_PROTECT_L2); | |
286 | if (ret) | |
287 | return ret; | |
288 | ||
289 | /* Set GO bit to initiate voltage transistion */ | |
290 | return tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, | |
291 | TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, | |
292 | TPS65217_PROTECT_L2); | |
293 | } | |
294 | ||
295 | static int tps65217_pmic_ldo_get_voltage_sel(struct regulator_dev *dev) | |
296 | { | |
297 | int ret; | |
298 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
299 | unsigned int selector, ldo = rdev_get_id(dev); | |
300 | ||
301 | if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4) | |
302 | return -EINVAL; | |
303 | ||
304 | ret = tps65217_reg_read(tps, tps->info[ldo]->set_vout_reg, &selector); | |
305 | if (ret) | |
306 | return ret; | |
307 | ||
308 | selector &= tps->info[ldo]->set_vout_mask; | |
309 | ||
310 | return selector; | |
311 | } | |
312 | ||
313 | static int tps65217_pmic_ldo_set_voltage_sel(struct regulator_dev *dev, | |
314 | unsigned selector) | |
315 | { | |
316 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
317 | int ldo = rdev_get_id(dev); | |
318 | ||
319 | if (ldo != TPS65217_LDO_1) | |
320 | return -EINVAL; | |
321 | ||
322 | if (selector >= tps->info[ldo]->table_len) | |
323 | return -EINVAL; | |
324 | ||
325 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
326 | return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg, | |
327 | tps->info[ldo]->set_vout_mask, | |
328 | selector, TPS65217_PROTECT_L2); | |
329 | } | |
330 | ||
331 | static int tps65217_pmic_ldo_set_voltage(struct regulator_dev *dev, | |
332 | int min_uV, int max_uV, unsigned *selector) | |
333 | { | |
334 | int ret; | |
335 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
336 | unsigned int ldo = rdev_get_id(dev); | |
337 | ||
338 | if (ldo < TPS65217_LDO_2 || ldo > TPS65217_LDO_4) | |
339 | return -EINVAL; | |
340 | ||
341 | if (min_uV < tps->info[ldo]->min_uV | |
342 | || min_uV > tps->info[ldo]->max_uV) | |
343 | return -EINVAL; | |
344 | ||
345 | if (max_uV < tps->info[ldo]->min_uV | |
346 | || max_uV > tps->info[ldo]->max_uV) | |
347 | return -EINVAL; | |
348 | ||
349 | ret = tps->info[ldo]->uv_to_vsel(min_uV, selector); | |
350 | if (ret) | |
351 | return ret; | |
352 | ||
353 | /* Set the voltage based on vsel value and write protect level is 2 */ | |
354 | return tps65217_set_bits(tps, tps->info[ldo]->set_vout_reg, | |
355 | tps->info[ldo]->set_vout_mask, | |
356 | *selector, TPS65217_PROTECT_L2); | |
357 | } | |
358 | ||
359 | static int tps65217_pmic_dcdc_list_voltage(struct regulator_dev *dev, | |
360 | unsigned selector) | |
361 | { | |
362 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
363 | unsigned int dcdc = rdev_get_id(dev); | |
364 | ||
365 | if (dcdc < TPS65217_DCDC_1 || dcdc > TPS65217_DCDC_3) | |
366 | return -EINVAL; | |
367 | ||
368 | if (selector >= tps->info[dcdc]->table_len) | |
369 | return -EINVAL; | |
370 | ||
371 | return tps->info[dcdc]->vsel_to_uv(selector); | |
372 | } | |
373 | ||
374 | static int tps65217_pmic_ldo_list_voltage(struct regulator_dev *dev, | |
375 | unsigned selector) | |
376 | { | |
377 | struct tps65217 *tps = rdev_get_drvdata(dev); | |
378 | unsigned int ldo = rdev_get_id(dev); | |
379 | ||
380 | if (ldo < TPS65217_LDO_1 || ldo > TPS65217_LDO_4) | |
381 | return -EINVAL; | |
382 | ||
383 | if (selector >= tps->info[ldo]->table_len) | |
384 | return -EINVAL; | |
385 | ||
386 | if (tps->info[ldo]->table) | |
387 | return tps->info[ldo]->table[selector]; | |
388 | ||
389 | return tps->info[ldo]->vsel_to_uv(selector); | |
390 | } | |
391 | ||
392 | /* Operations permitted on DCDCx */ | |
393 | static struct regulator_ops tps65217_pmic_dcdc_ops = { | |
394 | .is_enabled = tps65217_pmic_dcdc_is_enabled, | |
395 | .enable = tps65217_pmic_dcdc_enable, | |
396 | .disable = tps65217_pmic_dcdc_disable, | |
397 | .get_voltage_sel = tps65217_pmic_dcdc_get_voltage_sel, | |
398 | .set_voltage = tps65217_pmic_dcdc_set_voltage, | |
399 | .list_voltage = tps65217_pmic_dcdc_list_voltage, | |
400 | }; | |
401 | ||
402 | /* Operations permitted on LDO1 */ | |
403 | static struct regulator_ops tps65217_pmic_ldo1_ops = { | |
404 | .is_enabled = tps65217_pmic_ldo_is_enabled, | |
405 | .enable = tps65217_pmic_ldo_enable, | |
406 | .disable = tps65217_pmic_ldo_disable, | |
407 | .get_voltage_sel = tps65217_pmic_ldo_get_voltage_sel, | |
408 | .set_voltage_sel = tps65217_pmic_ldo_set_voltage_sel, | |
409 | .list_voltage = tps65217_pmic_ldo_list_voltage, | |
410 | }; | |
411 | ||
412 | /* Operations permitted on LDO2, LDO3 and LDO4 */ | |
413 | static struct regulator_ops tps65217_pmic_ldo234_ops = { | |
414 | .is_enabled = tps65217_pmic_ldo_is_enabled, | |
415 | .enable = tps65217_pmic_ldo_enable, | |
416 | .disable = tps65217_pmic_ldo_disable, | |
417 | .get_voltage_sel = tps65217_pmic_ldo_get_voltage_sel, | |
418 | .set_voltage = tps65217_pmic_ldo_set_voltage, | |
419 | .list_voltage = tps65217_pmic_ldo_list_voltage, | |
420 | }; | |
421 | ||
422 | static struct regulator_desc regulators[] = { | |
423 | TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, | |
424 | tps65217_pmic_dcdc_ops, 64), | |
425 | TPS65217_REGULATOR("DCDC2",TPS65217_DCDC_2, | |
426 | tps65217_pmic_dcdc_ops, 64), | |
427 | TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, | |
428 | tps65217_pmic_dcdc_ops, 64), | |
429 | TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, | |
430 | tps65217_pmic_ldo1_ops, 16), | |
431 | TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, | |
432 | tps65217_pmic_ldo234_ops, 64), | |
433 | TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, | |
434 | tps65217_pmic_ldo234_ops, 32), | |
435 | TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, | |
436 | tps65217_pmic_ldo234_ops, 32), | |
437 | }; | |
438 | ||
439 | static int __devinit tps65217_regulator_probe(struct platform_device *pdev) | |
440 | { | |
441 | struct regulator_dev *rdev; | |
442 | struct tps65217 *tps; | |
443 | struct tps_info *info = &tps65217_pmic_regs[pdev->id]; | |
444 | ||
445 | /* Already set by core driver */ | |
446 | tps = dev_to_tps65217(pdev->dev.parent); | |
447 | tps->info[pdev->id] = info; | |
448 | ||
449 | rdev = regulator_register(®ulators[pdev->id], &pdev->dev, | |
450 | pdev->dev.platform_data, tps); | |
451 | if (IS_ERR(rdev)) | |
452 | return PTR_ERR(rdev); | |
453 | ||
454 | platform_set_drvdata(pdev, rdev); | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | static int __devexit tps65217_regulator_remove(struct platform_device *pdev) | |
460 | { | |
461 | struct regulator_dev *rdev = platform_get_drvdata(pdev); | |
462 | ||
463 | platform_set_drvdata(pdev, NULL); | |
464 | regulator_unregister(rdev); | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | static struct platform_driver tps65217_regulator_driver = { | |
470 | .driver = { | |
471 | .name = "tps65217-pmic", | |
472 | }, | |
473 | .probe = tps65217_regulator_probe, | |
474 | .remove = __devexit_p(tps65217_regulator_remove), | |
475 | }; | |
476 | ||
477 | static int __init tps65217_regulator_init(void) | |
478 | { | |
479 | return platform_driver_register(&tps65217_regulator_driver); | |
480 | } | |
481 | subsys_initcall(tps65217_regulator_init); | |
482 | ||
483 | static void __exit tps65217_regulator_exit(void) | |
484 | { | |
485 | platform_driver_unregister(&tps65217_regulator_driver); | |
486 | } | |
487 | module_exit(tps65217_regulator_exit); | |
488 | ||
489 | ||
490 | MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); | |
491 | MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); | |
492 | MODULE_ALIAS("platform:tps65217-pmic"); | |
493 | MODULE_LICENSE("GPL v2"); |