1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Regulators driver for Dialog Semiconductor DA903x
4 //
5 // Copyright (C) 2006-2008 Marvell International Ltd.
6 // Copyright (C) 2008 Compulab Ltd.
7
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/err.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/regulator/driver.h>
14 #include <linux/regulator/machine.h>
15 #include <linux/mfd/da903x.h>
16
17 /* DA9030 Registers */
18 #define DA9030_INVAL (-1)
19 #define DA9030_LDO1011 (0x10)
20 #define DA9030_LDO15 (0x11)
21 #define DA9030_LDO1416 (0x12)
22 #define DA9030_LDO1819 (0x13)
23 #define DA9030_LDO17 (0x14)
24 #define DA9030_BUCK2DVM1 (0x15)
25 #define DA9030_BUCK2DVM2 (0x16)
26 #define DA9030_RCTL11 (0x17)
27 #define DA9030_RCTL21 (0x18)
28 #define DA9030_LDO1 (0x90)
29 #define DA9030_LDO23 (0x91)
30 #define DA9030_LDO45 (0x92)
31 #define DA9030_LDO6 (0x93)
32 #define DA9030_LDO78 (0x94)
33 #define DA9030_LDO912 (0x95)
34 #define DA9030_BUCK (0x96)
35 #define DA9030_RCTL12 (0x97)
36 #define DA9030_RCTL22 (0x98)
37 #define DA9030_LDO_UNLOCK (0xa0)
38 #define DA9030_LDO_UNLOCK_MASK (0xe0)
39 #define DA9034_OVER1 (0x10)
40
41 /* DA9034 Registers */
42 #define DA9034_INVAL (-1)
43 #define DA9034_OVER2 (0x11)
44 #define DA9034_OVER3 (0x12)
45 #define DA9034_LDO643 (0x13)
46 #define DA9034_LDO987 (0x14)
47 #define DA9034_LDO1110 (0x15)
48 #define DA9034_LDO1312 (0x16)
49 #define DA9034_LDO1514 (0x17)
50 #define DA9034_VCC1 (0x20)
51 #define DA9034_ADTV1 (0x23)
52 #define DA9034_ADTV2 (0x24)
53 #define DA9034_AVRC (0x25)
54 #define DA9034_CDTV1 (0x26)
55 #define DA9034_CDTV2 (0x27)
56 #define DA9034_CVRC (0x28)
57 #define DA9034_SDTV1 (0x29)
58 #define DA9034_SDTV2 (0x2a)
59 #define DA9034_SVRC (0x2b)
60 #define DA9034_MDTV1 (0x32)
61 #define DA9034_MDTV2 (0x33)
62 #define DA9034_MVRC (0x34)
63
64 /* DA9035 Registers. DA9034 Registers are compatible to DA9035. */
65 #define DA9035_OVER3 (0x12)
66 #define DA9035_VCC2 (0x1f)
67 #define DA9035_3DTV1 (0x2c)
68 #define DA9035_3DTV2 (0x2d)
69 #define DA9035_3VRC (0x2e)
70 #define DA9035_AUTOSKIP (0x2f)
71
72 struct da903x_regulator_info {
73 struct regulator_desc desc;
74
75 int max_uV;
76 int vol_reg;
77 int vol_shift;
78 int vol_nbits;
79 int update_reg;
80 int update_bit;
81 int enable_reg;
82 int enable_bit;
83 };
84
to_da903x_dev(struct regulator_dev * rdev)85 static inline struct device *to_da903x_dev(struct regulator_dev *rdev)
86 {
87 return rdev_get_dev(rdev)->parent->parent;
88 }
89
check_range(struct da903x_regulator_info * info,int min_uV,int max_uV)90 static inline int check_range(struct da903x_regulator_info *info,
91 int min_uV, int max_uV)
92 {
93 if (min_uV < info->desc.min_uV || min_uV > info->max_uV)
94 return -EINVAL;
95
96 return 0;
97 }
98
99 /* DA9030/DA9034 common operations */
da903x_set_voltage_sel(struct regulator_dev * rdev,unsigned selector)100 static int da903x_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
101 {
102 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
103 struct device *da9034_dev = to_da903x_dev(rdev);
104 uint8_t val, mask;
105
106 if (rdev->desc->n_voltages == 1)
107 return -EINVAL;
108
109 val = selector << info->vol_shift;
110 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
111
112 return da903x_update(da9034_dev, info->vol_reg, val, mask);
113 }
114
da903x_get_voltage_sel(struct regulator_dev * rdev)115 static int da903x_get_voltage_sel(struct regulator_dev *rdev)
116 {
117 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
118 struct device *da9034_dev = to_da903x_dev(rdev);
119 uint8_t val, mask;
120 int ret;
121
122 if (rdev->desc->n_voltages == 1)
123 return 0;
124
125 ret = da903x_read(da9034_dev, info->vol_reg, &val);
126 if (ret)
127 return ret;
128
129 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
130 val = (val & mask) >> info->vol_shift;
131
132 return val;
133 }
134
da903x_enable(struct regulator_dev * rdev)135 static int da903x_enable(struct regulator_dev *rdev)
136 {
137 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
138 struct device *da9034_dev = to_da903x_dev(rdev);
139
140 return da903x_set_bits(da9034_dev, info->enable_reg,
141 1 << info->enable_bit);
142 }
143
da903x_disable(struct regulator_dev * rdev)144 static int da903x_disable(struct regulator_dev *rdev)
145 {
146 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
147 struct device *da9034_dev = to_da903x_dev(rdev);
148
149 return da903x_clr_bits(da9034_dev, info->enable_reg,
150 1 << info->enable_bit);
151 }
152
da903x_is_enabled(struct regulator_dev * rdev)153 static int da903x_is_enabled(struct regulator_dev *rdev)
154 {
155 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
156 struct device *da9034_dev = to_da903x_dev(rdev);
157 uint8_t reg_val;
158 int ret;
159
160 ret = da903x_read(da9034_dev, info->enable_reg, ®_val);
161 if (ret)
162 return ret;
163
164 return !!(reg_val & (1 << info->enable_bit));
165 }
166
167 /* DA9030 specific operations */
da9030_set_ldo1_15_voltage_sel(struct regulator_dev * rdev,unsigned selector)168 static int da9030_set_ldo1_15_voltage_sel(struct regulator_dev *rdev,
169 unsigned selector)
170 {
171 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
172 struct device *da903x_dev = to_da903x_dev(rdev);
173 uint8_t val, mask;
174 int ret;
175
176 val = selector << info->vol_shift;
177 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
178 val |= DA9030_LDO_UNLOCK; /* have to set UNLOCK bits */
179 mask |= DA9030_LDO_UNLOCK_MASK;
180
181 /* write twice */
182 ret = da903x_update(da903x_dev, info->vol_reg, val, mask);
183 if (ret)
184 return ret;
185
186 return da903x_update(da903x_dev, info->vol_reg, val, mask);
187 }
188
da9030_map_ldo14_voltage(struct regulator_dev * rdev,int min_uV,int max_uV)189 static int da9030_map_ldo14_voltage(struct regulator_dev *rdev,
190 int min_uV, int max_uV)
191 {
192 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
193 int thresh, sel;
194
195 if (check_range(info, min_uV, max_uV)) {
196 pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
197 return -EINVAL;
198 }
199
200 thresh = (info->max_uV + info->desc.min_uV) / 2;
201 if (min_uV < thresh) {
202 sel = DIV_ROUND_UP(thresh - min_uV, info->desc.uV_step);
203 sel |= 0x4;
204 } else {
205 sel = DIV_ROUND_UP(min_uV - thresh, info->desc.uV_step);
206 }
207
208 return sel;
209 }
210
da9030_list_ldo14_voltage(struct regulator_dev * rdev,unsigned selector)211 static int da9030_list_ldo14_voltage(struct regulator_dev *rdev,
212 unsigned selector)
213 {
214 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
215 int volt;
216
217 if (selector & 0x4)
218 volt = rdev->desc->min_uV +
219 rdev->desc->uV_step * (3 - (selector & ~0x4));
220 else
221 volt = (info->max_uV + rdev->desc->min_uV) / 2 +
222 rdev->desc->uV_step * (selector & ~0x4);
223
224 if (volt > info->max_uV)
225 return -EINVAL;
226
227 return volt;
228 }
229
230 /* DA9034 specific operations */
da9034_set_dvc_voltage_sel(struct regulator_dev * rdev,unsigned selector)231 static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
232 unsigned selector)
233 {
234 struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
235 struct device *da9034_dev = to_da903x_dev(rdev);
236 uint8_t val, mask;
237 int ret;
238
239 val = selector << info->vol_shift;
240 mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
241
242 ret = da903x_update(da9034_dev, info->vol_reg, val, mask);
243 if (ret)
244 return ret;
245
246 ret = da903x_set_bits(da9034_dev, info->update_reg,
247 1 << info->update_bit);
248 return ret;
249 }
250
251 static const struct linear_range da9034_ldo12_ranges[] = {
252 REGULATOR_LINEAR_RANGE(1700000, 0, 7, 50000),
253 REGULATOR_LINEAR_RANGE(2700000, 8, 15, 50000),
254 };
255
256 static const struct regulator_ops da903x_regulator_ldo_ops = {
257 .set_voltage_sel = da903x_set_voltage_sel,
258 .get_voltage_sel = da903x_get_voltage_sel,
259 .list_voltage = regulator_list_voltage_linear,
260 .map_voltage = regulator_map_voltage_linear,
261 .enable = da903x_enable,
262 .disable = da903x_disable,
263 .is_enabled = da903x_is_enabled,
264 };
265
266 /* NOTE: this is dedicated for the insane DA9030 LDO14 */
267 static const struct regulator_ops da9030_regulator_ldo14_ops = {
268 .set_voltage_sel = da903x_set_voltage_sel,
269 .get_voltage_sel = da903x_get_voltage_sel,
270 .list_voltage = da9030_list_ldo14_voltage,
271 .map_voltage = da9030_map_ldo14_voltage,
272 .enable = da903x_enable,
273 .disable = da903x_disable,
274 .is_enabled = da903x_is_enabled,
275 };
276
277 /* NOTE: this is dedicated for the DA9030 LDO1 and LDO15 that have locks */
278 static const struct regulator_ops da9030_regulator_ldo1_15_ops = {
279 .set_voltage_sel = da9030_set_ldo1_15_voltage_sel,
280 .get_voltage_sel = da903x_get_voltage_sel,
281 .list_voltage = regulator_list_voltage_linear,
282 .map_voltage = regulator_map_voltage_linear,
283 .enable = da903x_enable,
284 .disable = da903x_disable,
285 .is_enabled = da903x_is_enabled,
286 };
287
288 static const struct regulator_ops da9034_regulator_dvc_ops = {
289 .set_voltage_sel = da9034_set_dvc_voltage_sel,
290 .get_voltage_sel = da903x_get_voltage_sel,
291 .list_voltage = regulator_list_voltage_linear,
292 .map_voltage = regulator_map_voltage_linear,
293 .enable = da903x_enable,
294 .disable = da903x_disable,
295 .is_enabled = da903x_is_enabled,
296 };
297
298 /* NOTE: this is dedicated for the insane LDO12 */
299 static const struct regulator_ops da9034_regulator_ldo12_ops = {
300 .set_voltage_sel = da903x_set_voltage_sel,
301 .get_voltage_sel = da903x_get_voltage_sel,
302 .list_voltage = regulator_list_voltage_linear_range,
303 .map_voltage = regulator_map_voltage_linear_range,
304 .enable = da903x_enable,
305 .disable = da903x_disable,
306 .is_enabled = da903x_is_enabled,
307 };
308
309 #define DA903x_LDO(_pmic, _id, min, max, step, vreg, shift, nbits, ereg, ebit) \
310 { \
311 .desc = { \
312 .name = "LDO" #_id, \
313 .ops = &da903x_regulator_ldo_ops, \
314 .type = REGULATOR_VOLTAGE, \
315 .id = _pmic##_ID_LDO##_id, \
316 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
317 .owner = THIS_MODULE, \
318 .min_uV = (min) * 1000, \
319 .uV_step = (step) * 1000, \
320 }, \
321 .max_uV = (max) * 1000, \
322 .vol_reg = _pmic##_##vreg, \
323 .vol_shift = (shift), \
324 .vol_nbits = (nbits), \
325 .enable_reg = _pmic##_##ereg, \
326 .enable_bit = (ebit), \
327 }
328
329 #define DA903x_DVC(_pmic, _id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
330 { \
331 .desc = { \
332 .name = #_id, \
333 .ops = &da9034_regulator_dvc_ops, \
334 .type = REGULATOR_VOLTAGE, \
335 .id = _pmic##_ID_##_id, \
336 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \
337 .owner = THIS_MODULE, \
338 .min_uV = (min) * 1000, \
339 .uV_step = (step) * 1000, \
340 }, \
341 .max_uV = (max) * 1000, \
342 .vol_reg = _pmic##_##vreg, \
343 .vol_shift = (0), \
344 .vol_nbits = (nbits), \
345 .update_reg = _pmic##_##ureg, \
346 .update_bit = (ubit), \
347 .enable_reg = _pmic##_##ereg, \
348 .enable_bit = (ebit), \
349 }
350
351 #define DA9034_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
352 DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
353
354 #define DA9030_LDO(_id, min, max, step, vreg, shift, nbits, ereg, ebit) \
355 DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
356
357 #define DA9030_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
358 DA903x_DVC(DA9030, _id, min, max, step, vreg, nbits, ureg, ubit, \
359 ereg, ebit)
360
361 #define DA9034_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
362 DA903x_DVC(DA9034, _id, min, max, step, vreg, nbits, ureg, ubit, \
363 ereg, ebit)
364
365 #define DA9035_DVC(_id, min, max, step, vreg, nbits, ureg, ubit, ereg, ebit) \
366 DA903x_DVC(DA9035, _id, min, max, step, vreg, nbits, ureg, ubit, \
367 ereg, ebit)
368
369 static struct da903x_regulator_info da903x_regulator_info[] = {
370 /* DA9030 */
371 DA9030_DVC(BUCK2, 850, 1625, 25, BUCK2DVM1, 5, BUCK2DVM1, 7, RCTL11, 0),
372
373 DA9030_LDO( 1, 1200, 3200, 100, LDO1, 0, 5, RCTL12, 1),
374 DA9030_LDO( 2, 1800, 3200, 100, LDO23, 0, 4, RCTL12, 2),
375 DA9030_LDO( 3, 1800, 3200, 100, LDO23, 4, 4, RCTL12, 3),
376 DA9030_LDO( 4, 1800, 3200, 100, LDO45, 0, 4, RCTL12, 4),
377 DA9030_LDO( 5, 1800, 3200, 100, LDO45, 4, 4, RCTL12, 5),
378 DA9030_LDO( 6, 1800, 3200, 100, LDO6, 0, 4, RCTL12, 6),
379 DA9030_LDO( 7, 1800, 3200, 100, LDO78, 0, 4, RCTL12, 7),
380 DA9030_LDO( 8, 1800, 3200, 100, LDO78, 4, 4, RCTL22, 0),
381 DA9030_LDO( 9, 1800, 3200, 100, LDO912, 0, 4, RCTL22, 1),
382 DA9030_LDO(10, 1800, 3200, 100, LDO1011, 0, 4, RCTL22, 2),
383 DA9030_LDO(11, 1800, 3200, 100, LDO1011, 4, 4, RCTL22, 3),
384 DA9030_LDO(12, 1800, 3200, 100, LDO912, 4, 4, RCTL22, 4),
385 DA9030_LDO(14, 2760, 2940, 30, LDO1416, 0, 3, RCTL11, 4),
386 DA9030_LDO(15, 1100, 2650, 50, LDO15, 0, 5, RCTL11, 5),
387 DA9030_LDO(16, 1100, 2650, 50, LDO1416, 3, 5, RCTL11, 6),
388 DA9030_LDO(17, 1800, 3200, 100, LDO17, 0, 4, RCTL11, 7),
389 DA9030_LDO(18, 1800, 3200, 100, LDO1819, 0, 4, RCTL21, 2),
390 DA9030_LDO(19, 1800, 3200, 100, LDO1819, 4, 4, RCTL21, 1),
391 DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
392
393 /* DA9034 */
394 DA9034_DVC(BUCK1, 725, 1500, 25, ADTV2, 5, VCC1, 0, OVER1, 0),
395 DA9034_DVC(BUCK2, 725, 1500, 25, CDTV2, 5, VCC1, 2, OVER1, 1),
396 DA9034_DVC(LDO2, 725, 1500, 25, SDTV2, 5, VCC1, 4, OVER1, 2),
397 DA9034_DVC(LDO1, 1700, 2075, 25, MDTV1, 4, VCC1, 6, OVER3, 4),
398
399 DA9034_LDO( 3, 1800, 3300, 100, LDO643, 0, 4, OVER3, 5),
400 DA9034_LDO( 4, 1800, 2900,1100, LDO643, 4, 1, OVER3, 6),
401 DA9034_LDO( 6, 2500, 2850, 50, LDO643, 5, 3, OVER2, 0),
402 DA9034_LDO( 7, 2700, 3050, 50, LDO987, 0, 3, OVER2, 1),
403 DA9034_LDO( 8, 2700, 2850, 50, LDO987, 3, 2, OVER2, 2),
404 DA9034_LDO( 9, 2700, 3050, 50, LDO987, 5, 3, OVER2, 3),
405 DA9034_LDO(10, 2700, 3050, 50, LDO1110, 0, 3, OVER2, 4),
406 DA9034_LDO(11, 1800, 3300, 100, LDO1110, 4, 4, OVER2, 5),
407 DA9034_LDO(12, 1700, 3050, 50, LDO1312, 0, 4, OVER3, 6),
408 DA9034_LDO(13, 1800, 3300, 100, LDO1312, 4, 4, OVER2, 7),
409 DA9034_LDO(14, 1800, 3300, 100, LDO1514, 0, 4, OVER3, 0),
410 DA9034_LDO(15, 1800, 3300, 100, LDO1514, 4, 4, OVER3, 1),
411 DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
412
413 /* DA9035 */
414 DA9035_DVC(BUCK3, 1800, 2200, 100, 3DTV1, 3, VCC2, 0, OVER3, 3),
415 };
416
find_regulator_info(int id)417 static inline struct da903x_regulator_info *find_regulator_info(int id)
418 {
419 struct da903x_regulator_info *ri;
420 int i;
421
422 for (i = 0; i < ARRAY_SIZE(da903x_regulator_info); i++) {
423 ri = &da903x_regulator_info[i];
424 if (ri->desc.id == id)
425 return ri;
426 }
427 return NULL;
428 }
429
da903x_regulator_probe(struct platform_device * pdev)430 static int da903x_regulator_probe(struct platform_device *pdev)
431 {
432 struct da903x_regulator_info *ri = NULL;
433 struct regulator_dev *rdev;
434 struct regulator_config config = { };
435
436 ri = find_regulator_info(pdev->id);
437 if (ri == NULL) {
438 dev_err(&pdev->dev, "invalid regulator ID specified\n");
439 return -EINVAL;
440 }
441
442 /* Workaround for the weird LDO12 voltage setting */
443 if (ri->desc.id == DA9034_ID_LDO12) {
444 ri->desc.ops = &da9034_regulator_ldo12_ops;
445 ri->desc.n_voltages = 16;
446 ri->desc.linear_ranges = da9034_ldo12_ranges;
447 ri->desc.n_linear_ranges = ARRAY_SIZE(da9034_ldo12_ranges);
448 }
449
450 if (ri->desc.id == DA9030_ID_LDO14)
451 ri->desc.ops = &da9030_regulator_ldo14_ops;
452
453 if (ri->desc.id == DA9030_ID_LDO1 || ri->desc.id == DA9030_ID_LDO15)
454 ri->desc.ops = &da9030_regulator_ldo1_15_ops;
455
456 config.dev = &pdev->dev;
457 config.init_data = dev_get_platdata(&pdev->dev);
458 config.driver_data = ri;
459
460 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
461 if (IS_ERR(rdev)) {
462 dev_err(&pdev->dev, "failed to register regulator %s\n",
463 ri->desc.name);
464 return PTR_ERR(rdev);
465 }
466
467 platform_set_drvdata(pdev, rdev);
468 return 0;
469 }
470
471 static struct platform_driver da903x_regulator_driver = {
472 .driver = {
473 .name = "da903x-regulator",
474 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
475 },
476 .probe = da903x_regulator_probe,
477 };
478
da903x_regulator_init(void)479 static int __init da903x_regulator_init(void)
480 {
481 return platform_driver_register(&da903x_regulator_driver);
482 }
483 subsys_initcall(da903x_regulator_init);
484
da903x_regulator_exit(void)485 static void __exit da903x_regulator_exit(void)
486 {
487 platform_driver_unregister(&da903x_regulator_driver);
488 }
489 module_exit(da903x_regulator_exit);
490
491 MODULE_LICENSE("GPL");
492 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
493 "Mike Rapoport <mike@compulab.co.il>");
494 MODULE_DESCRIPTION("Regulator Driver for Dialog Semiconductor DA903X PMIC");
495 MODULE_ALIAS("platform:da903x-regulator");
496