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15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/init.h>
18#include <linux/err.h>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#ifdef CONFIG_OF
23#include <linux/of.h>
24#include <linux/regulator/of_regulator.h>
25#endif
26
27#include <linux/mfd/da9052/da9052.h>
28#include <linux/mfd/da9052/reg.h>
29#include <linux/mfd/da9052/pdata.h>
30
31
32#define DA9052_BUCK_PERI_3uV_STEP 100000
33#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
34#define DA9052_CONST_3uV 3000000
35
36#define DA9052_MIN_UA 0
37#define DA9052_MAX_UA 3
38#define DA9052_CURRENT_RANGE 4
39
40
41#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
42#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
43
44
45#define DA9052_ID_BUCK1 0
46#define DA9052_ID_BUCK2 1
47#define DA9052_ID_BUCK3 2
48#define DA9052_ID_BUCK4 3
49#define DA9052_ID_LDO1 4
50#define DA9052_ID_LDO2 5
51#define DA9052_ID_LDO3 6
52#define DA9052_ID_LDO4 7
53#define DA9052_ID_LDO5 8
54#define DA9052_ID_LDO6 9
55#define DA9052_ID_LDO7 10
56#define DA9052_ID_LDO8 11
57#define DA9052_ID_LDO9 12
58#define DA9052_ID_LDO10 13
59
60static const u32 da9052_current_limits[3][4] = {
61 {700000, 800000, 1000000, 1200000},
62 {1600000, 2000000, 2400000, 3000000},
63 {800000, 1000000, 1200000, 1500000},
64
65
66};
67
68struct da9052_regulator_info {
69 struct regulator_desc reg_desc;
70 int step_uV;
71 int min_uV;
72 int max_uV;
73 unsigned char activate_bit;
74};
75
76struct da9052_regulator {
77 struct da9052 *da9052;
78 struct da9052_regulator_info *info;
79 struct regulator_dev *rdev;
80};
81
82static int verify_range(struct da9052_regulator_info *info,
83 int min_uV, int max_uV)
84{
85 if (min_uV > info->max_uV || max_uV < info->min_uV)
86 return -EINVAL;
87
88 return 0;
89}
90
91static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
92{
93 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
94 int offset = rdev_get_id(rdev);
95 int ret, row = 2;
96
97 ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
98 if (ret < 0)
99 return ret;
100
101
102
103
104 if (offset % 2 == 0)
105 ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
106 else
107 ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
108
109
110 if (regulator->da9052->chip_id == DA9052)
111 row = 0;
112 else if (offset == 0)
113 row = 1;
114
115 return da9052_current_limits[row][ret];
116}
117
118static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
119 int max_uA)
120{
121 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
122 int offset = rdev_get_id(rdev);
123 int reg_val = 0;
124 int i, row = 2;
125
126
127 if (regulator->da9052->chip_id == DA9052)
128 row = 0;
129 else if (offset == 0)
130 row = 1;
131
132 for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
133 if ((min_uA <= da9052_current_limits[row][i]) &&
134 (da9052_current_limits[row][i] <= max_uA)) {
135 reg_val = i;
136 break;
137 }
138 }
139
140 if (i < 0)
141 return -EINVAL;
142
143
144
145
146 if (offset % 2 == 0)
147 return da9052_reg_update(regulator->da9052,
148 DA9052_BUCKA_REG + offset/2,
149 DA9052_BUCK_ILIM_MASK_EVEN,
150 reg_val << 2);
151 else
152 return da9052_reg_update(regulator->da9052,
153 DA9052_BUCKA_REG + offset/2,
154 DA9052_BUCK_ILIM_MASK_ODD,
155 reg_val << 6);
156}
157
158static int da9052_list_voltage(struct regulator_dev *rdev,
159 unsigned int selector)
160{
161 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
162 struct da9052_regulator_info *info = regulator->info;
163 int id = rdev_get_id(rdev);
164 int volt_uV;
165
166 if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
167 && (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
168 volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
169 + info->min_uV);
170 volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
171 * (DA9052_BUCK_PERI_3uV_STEP);
172 } else {
173 volt_uV = (selector * info->step_uV) + info->min_uV;
174 }
175
176 if (volt_uV > info->max_uV)
177 return -EINVAL;
178
179 return volt_uV;
180}
181
182static int da9052_map_voltage(struct regulator_dev *rdev,
183 int min_uV, int max_uV)
184{
185 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
186 struct da9052_regulator_info *info = regulator->info;
187 int id = rdev_get_id(rdev);
188 int ret, sel;
189
190 ret = verify_range(info, min_uV, max_uV);
191 if (ret < 0)
192 return ret;
193
194 if (min_uV < info->min_uV)
195 min_uV = info->min_uV;
196
197 if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
198 && (min_uV >= DA9052_CONST_3uV)) {
199 sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
200 DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
201 DA9052_BUCK_PERI_3uV_STEP);
202 } else {
203 sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
204 }
205
206 ret = da9052_list_voltage(rdev, sel);
207 if (ret < 0)
208 return ret;
209
210 return sel;
211}
212
213static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev,
214 unsigned int selector)
215{
216 struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
217 struct da9052_regulator_info *info = regulator->info;
218 int id = rdev_get_id(rdev);
219 int ret;
220
221 ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
222 rdev->desc->vsel_mask, selector);
223 if (ret < 0)
224 return ret;
225
226
227
228
229 switch (id) {
230 case DA9052_ID_BUCK1:
231 case DA9052_ID_BUCK2:
232 case DA9052_ID_BUCK3:
233 case DA9052_ID_LDO2:
234 case DA9052_ID_LDO3:
235 ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
236 info->activate_bit, info->activate_bit);
237 break;
238 }
239
240 return ret;
241}
242
243static struct regulator_ops da9052_dcdc_ops = {
244 .get_current_limit = da9052_dcdc_get_current_limit,
245 .set_current_limit = da9052_dcdc_set_current_limit,
246
247 .list_voltage = da9052_list_voltage,
248 .map_voltage = da9052_map_voltage,
249 .get_voltage_sel = regulator_get_voltage_sel_regmap,
250 .set_voltage_sel = da9052_regulator_set_voltage_sel,
251 .is_enabled = regulator_is_enabled_regmap,
252 .enable = regulator_enable_regmap,
253 .disable = regulator_disable_regmap,
254};
255
256static struct regulator_ops da9052_ldo_ops = {
257 .list_voltage = da9052_list_voltage,
258 .map_voltage = da9052_map_voltage,
259 .get_voltage_sel = regulator_get_voltage_sel_regmap,
260 .set_voltage_sel = da9052_regulator_set_voltage_sel,
261 .is_enabled = regulator_is_enabled_regmap,
262 .enable = regulator_enable_regmap,
263 .disable = regulator_disable_regmap,
264};
265
266#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
267{\
268 .reg_desc = {\
269 .name = #_id,\
270 .ops = &da9052_ldo_ops,\
271 .type = REGULATOR_VOLTAGE,\
272 .id = DA9052_ID_##_id,\
273 .n_voltages = (max - min) / step + 1, \
274 .owner = THIS_MODULE,\
275 .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
276 .vsel_mask = (1 << (sbits)) - 1,\
277 .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
278 .enable_mask = 1 << (ebits),\
279 },\
280 .min_uV = (min) * 1000,\
281 .max_uV = (max) * 1000,\
282 .step_uV = (step) * 1000,\
283 .activate_bit = (abits),\
284}
285
286#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
287{\
288 .reg_desc = {\
289 .name = #_id,\
290 .ops = &da9052_dcdc_ops,\
291 .type = REGULATOR_VOLTAGE,\
292 .id = DA9052_ID_##_id,\
293 .n_voltages = (max - min) / step + 1, \
294 .owner = THIS_MODULE,\
295 .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
296 .vsel_mask = (1 << (sbits)) - 1,\
297 .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
298 .enable_mask = 1 << (ebits),\
299 },\
300 .min_uV = (min) * 1000,\
301 .max_uV = (max) * 1000,\
302 .step_uV = (step) * 1000,\
303 .activate_bit = (abits),\
304}
305
306static struct da9052_regulator_info da9052_regulator_info[] = {
307 DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
308 DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
309 DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
310 DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
311 DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
312 DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
313 DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
314 DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
315 DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
316 DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
317 DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
318 DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
319 DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
320 DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
321};
322
323static struct da9052_regulator_info da9053_regulator_info[] = {
324 DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
325 DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
326 DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
327 DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
328 DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
329 DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
330 DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
331 DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
332 DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
333 DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
334 DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
335 DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
336 DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
337 DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
338};
339
340static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
341 int id)
342{
343 struct da9052_regulator_info *info;
344 int i;
345
346 switch (chip_id) {
347 case DA9052:
348 for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
349 info = &da9052_regulator_info[i];
350 if (info->reg_desc.id == id)
351 return info;
352 }
353 break;
354 case DA9053_AA:
355 case DA9053_BA:
356 case DA9053_BB:
357 for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
358 info = &da9053_regulator_info[i];
359 if (info->reg_desc.id == id)
360 return info;
361 }
362 break;
363 }
364
365 return NULL;
366}
367
368static int da9052_regulator_probe(struct platform_device *pdev)
369{
370 struct regulator_config config = { };
371 struct da9052_regulator *regulator;
372 struct da9052 *da9052;
373 struct da9052_pdata *pdata;
374
375 regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
376 GFP_KERNEL);
377 if (!regulator)
378 return -ENOMEM;
379
380 da9052 = dev_get_drvdata(pdev->dev.parent);
381 pdata = dev_get_platdata(da9052->dev);
382 regulator->da9052 = da9052;
383
384 regulator->info = find_regulator_info(regulator->da9052->chip_id,
385 pdev->id);
386 if (regulator->info == NULL) {
387 dev_err(&pdev->dev, "invalid regulator ID specified\n");
388 return -EINVAL;
389 }
390
391 config.dev = &pdev->dev;
392 config.driver_data = regulator;
393 config.regmap = da9052->regmap;
394 if (pdata && pdata->regulators) {
395 config.init_data = pdata->regulators[pdev->id];
396 } else {
397#ifdef CONFIG_OF
398 struct device_node *nproot, *np;
399
400 nproot = of_node_get(da9052->dev->of_node);
401 if (!nproot)
402 return -ENODEV;
403
404 nproot = of_find_node_by_name(nproot, "regulators");
405 if (!nproot)
406 return -ENODEV;
407
408 for_each_child_of_node(nproot, np) {
409 if (!of_node_cmp(np->name,
410 regulator->info->reg_desc.name)) {
411 config.init_data = of_get_regulator_init_data(
412 &pdev->dev, np);
413 config.of_node = np;
414 break;
415 }
416 }
417 of_node_put(nproot);
418#endif
419 }
420
421 regulator->rdev = devm_regulator_register(&pdev->dev,
422 ®ulator->info->reg_desc,
423 &config);
424 if (IS_ERR(regulator->rdev)) {
425 dev_err(&pdev->dev, "failed to register regulator %s\n",
426 regulator->info->reg_desc.name);
427 return PTR_ERR(regulator->rdev);
428 }
429
430 platform_set_drvdata(pdev, regulator);
431
432 return 0;
433}
434
435static struct platform_driver da9052_regulator_driver = {
436 .probe = da9052_regulator_probe,
437 .driver = {
438 .name = "da9052-regulator",
439 .owner = THIS_MODULE,
440 },
441};
442
443static int __init da9052_regulator_init(void)
444{
445 return platform_driver_register(&da9052_regulator_driver);
446}
447subsys_initcall(da9052_regulator_init);
448
449static void __exit da9052_regulator_exit(void)
450{
451 platform_driver_unregister(&da9052_regulator_driver);
452}
453module_exit(da9052_regulator_exit);
454
455MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
456MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
457MODULE_LICENSE("GPL");
458MODULE_ALIAS("platform:da9052-regulator");
459
