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1 /*
2 * Regulators driver for Marvell 88PM8607
3 *
4 * Copyright (C) 2009 Marvell International Ltd.
5 * Haojian Zhuang <haojian.zhuang@marvell.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/i2c.h>
15 #include <linux/of.h>
16 #include <linux/regulator/of_regulator.h>
17 #include <linux/platform_device.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/mfd/88pm860x.h>
21 #include <linux/module.h>
22
23 struct pm8607_regulator_info {
24 struct regulator_desc desc;
25 struct pm860x_chip *chip;
26 struct regulator_dev *regulator;
27 struct i2c_client *i2c;
28 struct i2c_client *i2c_8606;
29
30 unsigned int *vol_table;
31 unsigned int *vol_suspend;
32
33 int update_reg;
34 int update_bit;
35 int slope_double;
36 };
37
38 static const unsigned int BUCK1_table[] = {
39 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000,
40 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000,
41 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
42 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
43 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000,
44 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000,
45 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000,
46 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000,
47 };
48
49 static const unsigned int BUCK1_suspend_table[] = {
50 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000,
51 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000,
52 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000,
53 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000,
54 800000, 825000, 850000, 875000, 900000, 925000, 950000, 975000,
55 1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
56 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
57 1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
58 };
59
60 static const unsigned int BUCK2_table[] = {
61 0, 50000, 100000, 150000, 200000, 250000, 300000, 350000,
62 400000, 450000, 500000, 550000, 600000, 650000, 700000, 750000,
63 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000,
64 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
65 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
66 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
67 2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
68 2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
69 };
70
71 static const unsigned int BUCK2_suspend_table[] = {
72 0, 50000, 100000, 150000, 200000, 250000, 300000, 350000,
73 400000, 450000, 500000, 550000, 600000, 650000, 700000, 750000,
74 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000, 1150000,
75 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000, 1550000,
76 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000,
77 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000,
78 2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000,
79 2800000, 2850000, 2900000, 2950000, 3000000, 3000000, 3000000, 3000000,
80 };
81
82 static const unsigned int BUCK3_table[] = {
83 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000,
84 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000,
85 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000,
86 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000,
87 800000, 825000, 850000, 875000, 900000, 925000, 950000, 975000,
88 1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
89 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
90 1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
91 };
92
93 static const unsigned int BUCK3_suspend_table[] = {
94 0, 25000, 50000, 75000, 100000, 125000, 150000, 175000,
95 200000, 225000, 250000, 275000, 300000, 325000, 350000, 375000,
96 400000, 425000, 450000, 475000, 500000, 525000, 550000, 575000,
97 600000, 625000, 650000, 675000, 700000, 725000, 750000, 775000,
98 800000, 825000, 850000, 875000, 900000, 925000, 950000, 975000,
99 1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
100 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000,
101 1400000, 1425000, 1450000, 1475000, 1500000, 1500000, 1500000, 1500000,
102 };
103
104 static const unsigned int LDO1_table[] = {
105 1800000, 1200000, 2800000, 0,
106 };
107
108 static const unsigned int LDO1_suspend_table[] = {
109 1800000, 1200000, 0, 0,
110 };
111
112 static const unsigned int LDO2_table[] = {
113 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
114 };
115
116 static const unsigned int LDO2_suspend_table[] = {
117 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
118 };
119
120 static const unsigned int LDO3_table[] = {
121 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
122 };
123
124 static const unsigned int LDO3_suspend_table[] = {
125 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
126 };
127
128 static const unsigned int LDO4_table[] = {
129 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 3300000,
130 };
131
132 static const unsigned int LDO4_suspend_table[] = {
133 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2900000, 2900000,
134 };
135
136 static const unsigned int LDO5_table[] = {
137 2900000, 3000000, 3100000, 3300000,
138 };
139
140 static const unsigned int LDO5_suspend_table[] = {
141 2900000, 0, 0, 0,
142 };
143
144 static const unsigned int LDO6_table[] = {
145 1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 3300000,
146 };
147
148 static const unsigned int LDO6_suspend_table[] = {
149 1800000, 1850000, 2600000, 2650000, 2700000, 2750000, 2800000, 2900000,
150 };
151
152 static const unsigned int LDO7_table[] = {
153 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
154 };
155
156 static const unsigned int LDO7_suspend_table[] = {
157 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
158 };
159
160 static const unsigned int LDO8_table[] = {
161 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
162 };
163
164 static const unsigned int LDO8_suspend_table[] = {
165 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
166 };
167
168 static const unsigned int LDO9_table[] = {
169 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
170 };
171
172 static const unsigned int LDO9_suspend_table[] = {
173 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
174 };
175
176 static const unsigned int LDO10_table[] = {
177 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 3300000,
178 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
179 };
180
181 static const unsigned int LDO10_suspend_table[] = {
182 1800000, 1850000, 1900000, 2700000, 2750000, 2800000, 2850000, 2900000,
183 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
184 };
185
186 static const unsigned int LDO12_table[] = {
187 1800000, 1900000, 2700000, 2800000, 2900000, 3000000, 3100000, 3300000,
188 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
189 };
190
191 static const unsigned int LDO12_suspend_table[] = {
192 1800000, 1900000, 2700000, 2800000, 2900000, 2900000, 2900000, 2900000,
193 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000, 1200000,
194 };
195
196 static const unsigned int LDO13_table[] = {
197 1200000, 1300000, 1800000, 2000000, 2500000, 2800000, 3000000, 0,
198 };
199
200 static const unsigned int LDO13_suspend_table[] = {
201 0,
202 };
203
204 static const unsigned int LDO14_table[] = {
205 1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 3300000,
206 };
207
208 static const unsigned int LDO14_suspend_table[] = {
209 1800000, 1850000, 2700000, 2750000, 2800000, 2850000, 2900000, 2900000,
210 };
211
212 static int pm8607_list_voltage(struct regulator_dev *rdev, unsigned index)
213 {
214 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
215 int ret = -EINVAL;
216
217 if (info->vol_table && (index < rdev->desc->n_voltages)) {
218 ret = info->vol_table[index];
219 if (info->slope_double)
220 ret <<= 1;
221 }
222 return ret;
223 }
224
225 static int pm8607_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
226 {
227 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
228 uint8_t val;
229 int ret;
230
231 val = (uint8_t)(selector << (ffs(rdev->desc->vsel_mask) - 1));
232
233 ret = pm860x_set_bits(info->i2c, rdev->desc->vsel_reg,
234 rdev->desc->vsel_mask, val);
235 if (ret)
236 return ret;
237 switch (info->desc.id) {
238 case PM8607_ID_BUCK1:
239 case PM8607_ID_BUCK3:
240 ret = pm860x_set_bits(info->i2c, info->update_reg,
241 1 << info->update_bit,
242 1 << info->update_bit);
243 break;
244 }
245 return ret;
246 }
247
248 static int pm8606_preg_enable(struct regulator_dev *rdev)
249 {
250 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
251
252 return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
253 1 << rdev->desc->enable_mask, 0);
254 }
255
256 static int pm8606_preg_disable(struct regulator_dev *rdev)
257 {
258 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
259
260 return pm860x_set_bits(info->i2c, rdev->desc->enable_reg,
261 1 << rdev->desc->enable_mask,
262 1 << rdev->desc->enable_mask);
263 }
264
265 static int pm8606_preg_is_enabled(struct regulator_dev *rdev)
266 {
267 struct pm8607_regulator_info *info = rdev_get_drvdata(rdev);
268 int ret;
269
270 ret = pm860x_reg_read(info->i2c, rdev->desc->enable_reg);
271 if (ret < 0)
272 return ret;
273
274 return !((unsigned char)ret & (1 << rdev->desc->enable_mask));
275 }
276
277 static struct regulator_ops pm8607_regulator_ops = {
278 .list_voltage = pm8607_list_voltage,
279 .set_voltage_sel = pm8607_set_voltage_sel,
280 .get_voltage_sel = regulator_get_voltage_sel_regmap,
281 .enable = regulator_enable_regmap,
282 .disable = regulator_disable_regmap,
283 .is_enabled = regulator_is_enabled_regmap,
284 };
285
286 static struct regulator_ops pm8606_preg_ops = {
287 .enable = pm8606_preg_enable,
288 .disable = pm8606_preg_disable,
289 .is_enabled = pm8606_preg_is_enabled,
290 };
291
292 #define PM8606_PREG(ereg, ebit) \
293 { \
294 .desc = { \
295 .name = "PREG", \
296 .ops = &pm8606_preg_ops, \
297 .type = REGULATOR_CURRENT, \
298 .id = PM8606_ID_PREG, \
299 .owner = THIS_MODULE, \
300 .enable_reg = PM8606_##ereg, \
301 .enable_mask = (ebit), \
302 }, \
303 }
304
305 #define PM8607_DVC(vreg, ureg, ubit, ereg, ebit) \
306 { \
307 .desc = { \
308 .name = #vreg, \
309 .ops = &pm8607_regulator_ops, \
310 .type = REGULATOR_VOLTAGE, \
311 .id = PM8607_ID_##vreg, \
312 .owner = THIS_MODULE, \
313 .n_voltages = ARRAY_SIZE(vreg##_table), \
314 .vsel_reg = PM8607_##vreg, \
315 .vsel_mask = ARRAY_SIZE(vreg##_table) - 1, \
316 .enable_reg = PM8607_##ereg, \
317 .enable_mask = 1 << (ebit), \
318 }, \
319 .update_reg = PM8607_##ureg, \
320 .update_bit = (ubit), \
321 .slope_double = (0), \
322 .vol_table = (unsigned int *)&vreg##_table, \
323 .vol_suspend = (unsigned int *)&vreg##_suspend_table, \
324 }
325
326 #define PM8607_LDO(_id, vreg, shift, ereg, ebit) \
327 { \
328 .desc = { \
329 .name = "LDO" #_id, \
330 .ops = &pm8607_regulator_ops, \
331 .type = REGULATOR_VOLTAGE, \
332 .id = PM8607_ID_LDO##_id, \
333 .owner = THIS_MODULE, \
334 .n_voltages = ARRAY_SIZE(LDO##_id##_table), \
335 .vsel_reg = PM8607_##vreg, \
336 .vsel_mask = (ARRAY_SIZE(LDO##_id##_table) - 1) << (shift), \
337 .enable_reg = PM8607_##ereg, \
338 .enable_mask = 1 << (ebit), \
339 }, \
340 .slope_double = (0), \
341 .vol_table = (unsigned int *)&LDO##_id##_table, \
342 .vol_suspend = (unsigned int *)&LDO##_id##_suspend_table, \
343 }
344
345 static struct pm8607_regulator_info pm8607_regulator_info[] = {
346 PM8607_DVC(BUCK1, GO, 0, SUPPLIES_EN11, 0),
347 PM8607_DVC(BUCK2, GO, 1, SUPPLIES_EN11, 1),
348 PM8607_DVC(BUCK3, GO, 2, SUPPLIES_EN11, 2),
349
350 PM8607_LDO(1, LDO1, 0, SUPPLIES_EN11, 3),
351 PM8607_LDO(2, LDO2, 0, SUPPLIES_EN11, 4),
352 PM8607_LDO(3, LDO3, 0, SUPPLIES_EN11, 5),
353 PM8607_LDO(4, LDO4, 0, SUPPLIES_EN11, 6),
354 PM8607_LDO(5, LDO5, 0, SUPPLIES_EN11, 7),
355 PM8607_LDO(6, LDO6, 0, SUPPLIES_EN12, 0),
356 PM8607_LDO(7, LDO7, 0, SUPPLIES_EN12, 1),
357 PM8607_LDO(8, LDO8, 0, SUPPLIES_EN12, 2),
358 PM8607_LDO(9, LDO9, 0, SUPPLIES_EN12, 3),
359 PM8607_LDO(10, LDO10, 0, SUPPLIES_EN12, 4),
360 PM8607_LDO(12, LDO12, 0, SUPPLIES_EN12, 5),
361 PM8607_LDO(13, VIBRATOR_SET, 1, VIBRATOR_SET, 0),
362 PM8607_LDO(14, LDO14, 0, SUPPLIES_EN12, 6),
363 };
364
365 static struct pm8607_regulator_info pm8606_regulator_info[] = {
366 PM8606_PREG(PREREGULATORB, 5),
367 };
368
369 #ifdef CONFIG_OF
370 static int pm8607_regulator_dt_init(struct platform_device *pdev,
371 struct pm8607_regulator_info *info,
372 struct regulator_config *config)
373 {
374 struct device_node *nproot, *np;
375 nproot = of_node_get(pdev->dev.parent->of_node);
376 if (!nproot)
377 return -ENODEV;
378 nproot = of_find_node_by_name(nproot, "regulators");
379 if (!nproot) {
380 dev_err(&pdev->dev, "failed to find regulators node\n");
381 return -ENODEV;
382 }
383 for_each_child_of_node(nproot, np) {
384 if (!of_node_cmp(np->name, info->desc.name)) {
385 config->init_data =
386 of_get_regulator_init_data(&pdev->dev, np);
387 config->of_node = np;
388 break;
389 }
390 }
391 of_node_put(nproot);
392 return 0;
393 }
394 #else
395 #define pm8607_regulator_dt_init(x, y, z) (-1)
396 #endif
397
398 static int pm8607_regulator_probe(struct platform_device *pdev)
399 {
400 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
401 struct pm8607_regulator_info *info = NULL;
402 struct regulator_init_data *pdata = pdev->dev.platform_data;
403 struct regulator_config config = { };
404 struct resource *res;
405 int i;
406
407 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
408 if (res) {
409 /* There're resources in 88PM8607 regulator driver */
410 for (i = 0; i < ARRAY_SIZE(pm8607_regulator_info); i++) {
411 info = &pm8607_regulator_info[i];
412 if (info->desc.vsel_reg == res->start)
413 break;
414 }
415 if (i == ARRAY_SIZE(pm8607_regulator_info)) {
416 dev_err(&pdev->dev, "Failed to find regulator %llu\n",
417 (unsigned long long)res->start);
418 return -EINVAL;
419 }
420 } else {
421 /* There's no resource in 88PM8606 PREG regulator driver */
422 info = &pm8606_regulator_info[0];
423 /* i is used to check regulator ID */
424 i = -1;
425 }
426 info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
427 info->i2c_8606 = (chip->id == CHIP_PM8607) ? chip->companion :
428 chip->client;
429 info->chip = chip;
430
431 /* check DVC ramp slope double */
432 if ((i == PM8607_ID_BUCK3) && info->chip->buck3_double)
433 info->slope_double = 1;
434
435 config.dev = &pdev->dev;
436 config.driver_data = info;
437
438 if (pm8607_regulator_dt_init(pdev, info, &config))
439 if (pdata)
440 config.init_data = pdata;
441
442 if (chip->id == CHIP_PM8607)
443 config.regmap = chip->regmap;
444 else
445 config.regmap = chip->regmap_companion;
446
447 info->regulator = regulator_register(&info->desc, &config);
448 if (IS_ERR(info->regulator)) {
449 dev_err(&pdev->dev, "failed to register regulator %s\n",
450 info->desc.name);
451 return PTR_ERR(info->regulator);
452 }
453
454 platform_set_drvdata(pdev, info);
455 return 0;
456 }
457
458 static int pm8607_regulator_remove(struct platform_device *pdev)
459 {
460 struct pm8607_regulator_info *info = platform_get_drvdata(pdev);
461
462 platform_set_drvdata(pdev, NULL);
463 regulator_unregister(info->regulator);
464 return 0;
465 }
466
467 static struct platform_device_id pm8607_regulator_driver_ids[] = {
468 {
469 .name = "88pm860x-regulator",
470 .driver_data = 0,
471 }, {
472 .name = "88pm860x-preg",
473 .driver_data = 0,
474 },
475 { },
476 };
477 MODULE_DEVICE_TABLE(platform, pm8607_regulator_driver_ids);
478
479 static struct platform_driver pm8607_regulator_driver = {
480 .driver = {
481 .name = "88pm860x-regulator",
482 .owner = THIS_MODULE,
483 },
484 .probe = pm8607_regulator_probe,
485 .remove = pm8607_regulator_remove,
486 .id_table = pm8607_regulator_driver_ids,
487 };
488
489 static int __init pm8607_regulator_init(void)
490 {
491 return platform_driver_register(&pm8607_regulator_driver);
492 }
493 subsys_initcall(pm8607_regulator_init);
494
495 static void __exit pm8607_regulator_exit(void)
496 {
497 platform_driver_unregister(&pm8607_regulator_driver);
498 }
499 module_exit(pm8607_regulator_exit);
500
501 MODULE_LICENSE("GPL");
502 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
503 MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM8607 PMIC");
504 MODULE_ALIAS("platform:88pm8607-regulator");