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08bf1c0a AJ |
1 | /* |
2 | * da9052-regulator.c: Regulator driver for DA9052 | |
3 | * | |
4 | * Copyright(c) 2011 Dialog Semiconductor Ltd. | |
5 | * | |
6 | * Author: David Dajun Chen <dchen@diasemi.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
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> | |
88c84c14 | 22 | #ifdef CONFIG_OF |
cd22a965 | 23 | #include <linux/of.h> |
88c84c14 YCLP |
24 | #include <linux/regulator/of_regulator.h> |
25 | #endif | |
08bf1c0a AJ |
26 | |
27 | #include <linux/mfd/da9052/da9052.h> | |
28 | #include <linux/mfd/da9052/reg.h> | |
29 | #include <linux/mfd/da9052/pdata.h> | |
30 | ||
31 | /* Buck step size */ | |
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 | /* Bit masks */ | |
41 | #define DA9052_BUCK_ILIM_MASK_EVEN 0x0c | |
42 | #define DA9052_BUCK_ILIM_MASK_ODD 0xc0 | |
43 | ||
9210f05b AL |
44 | /* DA9052 REGULATOR IDs */ |
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 | ||
08bf1c0a AJ |
60 | static const u32 da9052_current_limits[3][4] = { |
61 | {700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */ | |
62 | {1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */ | |
63 | {800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO, | |
64 | * BUCK-MEM and BUCK-PERI | |
65 | */ | |
66 | }; | |
67 | ||
68 | struct da9052_regulator_info { | |
69 | struct regulator_desc reg_desc; | |
70 | int step_uV; | |
71 | int min_uV; | |
72 | int max_uV; | |
08bf1c0a AJ |
73 | }; |
74 | ||
75 | struct da9052_regulator { | |
76 | struct da9052 *da9052; | |
77 | struct da9052_regulator_info *info; | |
78 | struct regulator_dev *rdev; | |
79 | }; | |
80 | ||
81 | static int verify_range(struct da9052_regulator_info *info, | |
82 | int min_uV, int max_uV) | |
83 | { | |
84 | if (min_uV > info->max_uV || max_uV < info->min_uV) | |
85 | return -EINVAL; | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
08bf1c0a AJ |
90 | static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev) |
91 | { | |
92 | struct da9052_regulator *regulator = rdev_get_drvdata(rdev); | |
93 | int offset = rdev_get_id(rdev); | |
94 | int ret, row = 2; | |
95 | ||
96 | ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2); | |
97 | if (ret < 0) | |
98 | return ret; | |
99 | ||
100 | /* Determine the even or odd position of the buck current limit | |
101 | * register field | |
102 | */ | |
103 | if (offset % 2 == 0) | |
104 | ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2; | |
105 | else | |
106 | ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6; | |
107 | ||
108 | /* Select the appropriate current limit range */ | |
109 | if (regulator->da9052->chip_id == DA9052) | |
110 | row = 0; | |
111 | else if (offset == 0) | |
112 | row = 1; | |
113 | ||
114 | return da9052_current_limits[row][ret]; | |
115 | } | |
116 | ||
117 | static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA, | |
118 | int max_uA) | |
119 | { | |
120 | struct da9052_regulator *regulator = rdev_get_drvdata(rdev); | |
121 | int offset = rdev_get_id(rdev); | |
122 | int reg_val = 0; | |
123 | int i, row = 2; | |
124 | ||
125 | /* Select the appropriate current limit range */ | |
126 | if (regulator->da9052->chip_id == DA9052) | |
127 | row = 0; | |
128 | else if (offset == 0) | |
129 | row = 1; | |
130 | ||
19d23c21 | 131 | for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) { |
1e369bcd AL |
132 | if ((min_uA <= da9052_current_limits[row][i]) && |
133 | (da9052_current_limits[row][i] <= max_uA)) { | |
08bf1c0a AJ |
134 | reg_val = i; |
135 | break; | |
136 | } | |
137 | } | |
138 | ||
1e369bcd AL |
139 | if (i < 0) |
140 | return -EINVAL; | |
141 | ||
08bf1c0a AJ |
142 | /* Determine the even or odd position of the buck current limit |
143 | * register field | |
144 | */ | |
145 | if (offset % 2 == 0) | |
146 | return da9052_reg_update(regulator->da9052, | |
147 | DA9052_BUCKA_REG + offset/2, | |
148 | DA9052_BUCK_ILIM_MASK_EVEN, | |
149 | reg_val << 2); | |
150 | else | |
151 | return da9052_reg_update(regulator->da9052, | |
152 | DA9052_BUCKA_REG + offset/2, | |
153 | DA9052_BUCK_ILIM_MASK_ODD, | |
154 | reg_val << 6); | |
155 | } | |
156 | ||
08bf1c0a AJ |
157 | static int da9052_list_voltage(struct regulator_dev *rdev, |
158 | unsigned int selector) | |
159 | { | |
160 | struct da9052_regulator *regulator = rdev_get_drvdata(rdev); | |
161 | struct da9052_regulator_info *info = regulator->info; | |
0ec446ea | 162 | int id = rdev_get_id(rdev); |
08bf1c0a AJ |
163 | int volt_uV; |
164 | ||
0ec446ea AL |
165 | if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052) |
166 | && (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) { | |
167 | volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV) | |
168 | + info->min_uV); | |
169 | volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV) | |
170 | * (DA9052_BUCK_PERI_3uV_STEP); | |
171 | } else { | |
172 | volt_uV = (selector * info->step_uV) + info->min_uV; | |
173 | } | |
08bf1c0a AJ |
174 | |
175 | if (volt_uV > info->max_uV) | |
176 | return -EINVAL; | |
177 | ||
178 | return volt_uV; | |
179 | } | |
180 | ||
4923b48b AL |
181 | static int da9052_map_voltage(struct regulator_dev *rdev, |
182 | int min_uV, int max_uV) | |
08bf1c0a AJ |
183 | { |
184 | struct da9052_regulator *regulator = rdev_get_drvdata(rdev); | |
185 | struct da9052_regulator_info *info = regulator->info; | |
0ec446ea | 186 | int id = rdev_get_id(rdev); |
4923b48b | 187 | int ret, sel; |
08bf1c0a AJ |
188 | |
189 | ret = verify_range(info, min_uV, max_uV); | |
190 | if (ret < 0) | |
191 | return ret; | |
192 | ||
193 | if (min_uV < info->min_uV) | |
194 | min_uV = info->min_uV; | |
195 | ||
0ec446ea AL |
196 | if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052) |
197 | && (min_uV >= DA9052_CONST_3uV)) { | |
4923b48b AL |
198 | sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV + |
199 | DIV_ROUND_UP(min_uV - DA9052_CONST_3uV, | |
200 | DA9052_BUCK_PERI_3uV_STEP); | |
0ec446ea | 201 | } else { |
4923b48b | 202 | sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV); |
0ec446ea | 203 | } |
08bf1c0a | 204 | |
4923b48b | 205 | ret = da9052_list_voltage(rdev, sel); |
08bf1c0a AJ |
206 | if (ret < 0) |
207 | return ret; | |
208 | ||
4923b48b AL |
209 | return sel; |
210 | } | |
211 | ||
08bf1c0a | 212 | static struct regulator_ops da9052_dcdc_ops = { |
08bf1c0a AJ |
213 | .get_current_limit = da9052_dcdc_get_current_limit, |
214 | .set_current_limit = da9052_dcdc_set_current_limit, | |
215 | ||
216 | .list_voltage = da9052_list_voltage, | |
4923b48b | 217 | .map_voltage = da9052_map_voltage, |
09812bc4 | 218 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
68f75060 | 219 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
0d481f74 AL |
220 | .is_enabled = regulator_is_enabled_regmap, |
221 | .enable = regulator_enable_regmap, | |
222 | .disable = regulator_disable_regmap, | |
08bf1c0a AJ |
223 | }; |
224 | ||
08bf1c0a | 225 | static struct regulator_ops da9052_ldo_ops = { |
08bf1c0a | 226 | .list_voltage = da9052_list_voltage, |
4923b48b | 227 | .map_voltage = da9052_map_voltage, |
09812bc4 | 228 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
68f75060 | 229 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
0d481f74 AL |
230 | .is_enabled = regulator_is_enabled_regmap, |
231 | .enable = regulator_enable_regmap, | |
232 | .disable = regulator_disable_regmap, | |
08bf1c0a AJ |
233 | }; |
234 | ||
08bf1c0a AJ |
235 | #define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \ |
236 | {\ | |
237 | .reg_desc = {\ | |
9210f05b | 238 | .name = #_id,\ |
08bf1c0a AJ |
239 | .ops = &da9052_ldo_ops,\ |
240 | .type = REGULATOR_VOLTAGE,\ | |
9210f05b | 241 | .id = DA9052_ID_##_id,\ |
7b957654 | 242 | .n_voltages = (max - min) / step + 1, \ |
08bf1c0a | 243 | .owner = THIS_MODULE,\ |
09812bc4 AL |
244 | .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ |
245 | .vsel_mask = (1 << (sbits)) - 1,\ | |
68f75060 AL |
246 | .apply_reg = DA9052_SUPPLY_REG, \ |
247 | .apply_bit = (abits), \ | |
0d481f74 AL |
248 | .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ |
249 | .enable_mask = 1 << (ebits),\ | |
08bf1c0a AJ |
250 | },\ |
251 | .min_uV = (min) * 1000,\ | |
252 | .max_uV = (max) * 1000,\ | |
253 | .step_uV = (step) * 1000,\ | |
08bf1c0a AJ |
254 | } |
255 | ||
256 | #define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \ | |
257 | {\ | |
258 | .reg_desc = {\ | |
9210f05b | 259 | .name = #_id,\ |
08bf1c0a AJ |
260 | .ops = &da9052_dcdc_ops,\ |
261 | .type = REGULATOR_VOLTAGE,\ | |
9210f05b | 262 | .id = DA9052_ID_##_id,\ |
7b957654 | 263 | .n_voltages = (max - min) / step + 1, \ |
08bf1c0a | 264 | .owner = THIS_MODULE,\ |
09812bc4 AL |
265 | .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ |
266 | .vsel_mask = (1 << (sbits)) - 1,\ | |
68f75060 AL |
267 | .apply_reg = DA9052_SUPPLY_REG, \ |
268 | .apply_bit = (abits), \ | |
0d481f74 AL |
269 | .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \ |
270 | .enable_mask = 1 << (ebits),\ | |
08bf1c0a AJ |
271 | },\ |
272 | .min_uV = (min) * 1000,\ | |
273 | .max_uV = (max) * 1000,\ | |
274 | .step_uV = (step) * 1000,\ | |
08bf1c0a AJ |
275 | } |
276 | ||
6242eae9 | 277 | static struct da9052_regulator_info da9052_regulator_info[] = { |
9210f05b AL |
278 | DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO), |
279 | DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO), | |
280 | DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO), | |
0ec446ea | 281 | DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0), |
9210f05b | 282 | DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0), |
0ec446ea AL |
283 | DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO), |
284 | DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO), | |
9210f05b AL |
285 | DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0), |
286 | DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0), | |
287 | DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0), | |
288 | DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0), | |
289 | DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0), | |
290 | DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0), | |
291 | DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0), | |
08bf1c0a AJ |
292 | }; |
293 | ||
6242eae9 | 294 | static struct da9052_regulator_info da9053_regulator_info[] = { |
9210f05b AL |
295 | DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO), |
296 | DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO), | |
297 | DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO), | |
0ec446ea | 298 | DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0), |
9210f05b | 299 | DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0), |
0ec446ea AL |
300 | DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO), |
301 | DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO), | |
9210f05b AL |
302 | DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0), |
303 | DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0), | |
304 | DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0), | |
305 | DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0), | |
306 | DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0), | |
307 | DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0), | |
308 | DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0), | |
08bf1c0a AJ |
309 | }; |
310 | ||
311 | static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id, | |
312 | int id) | |
313 | { | |
314 | struct da9052_regulator_info *info; | |
315 | int i; | |
316 | ||
984b5a6b AJ |
317 | switch (chip_id) { |
318 | case DA9052: | |
08bf1c0a AJ |
319 | for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) { |
320 | info = &da9052_regulator_info[i]; | |
321 | if (info->reg_desc.id == id) | |
322 | return info; | |
323 | } | |
984b5a6b AJ |
324 | break; |
325 | case DA9053_AA: | |
326 | case DA9053_BA: | |
327 | case DA9053_BB: | |
08bf1c0a AJ |
328 | for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) { |
329 | info = &da9053_regulator_info[i]; | |
330 | if (info->reg_desc.id == id) | |
331 | return info; | |
332 | } | |
984b5a6b | 333 | break; |
08bf1c0a AJ |
334 | } |
335 | ||
336 | return NULL; | |
337 | } | |
338 | ||
a5023574 | 339 | static int da9052_regulator_probe(struct platform_device *pdev) |
08bf1c0a | 340 | { |
c172708d | 341 | struct regulator_config config = { }; |
08bf1c0a AJ |
342 | struct da9052_regulator *regulator; |
343 | struct da9052 *da9052; | |
344 | struct da9052_pdata *pdata; | |
08bf1c0a | 345 | |
984b5a6b AJ |
346 | regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator), |
347 | GFP_KERNEL); | |
08bf1c0a AJ |
348 | if (!regulator) |
349 | return -ENOMEM; | |
350 | ||
351 | da9052 = dev_get_drvdata(pdev->dev.parent); | |
dff91d0b | 352 | pdata = dev_get_platdata(da9052->dev); |
08bf1c0a AJ |
353 | regulator->da9052 = da9052; |
354 | ||
355 | regulator->info = find_regulator_info(regulator->da9052->chip_id, | |
356 | pdev->id); | |
357 | if (regulator->info == NULL) { | |
358 | dev_err(&pdev->dev, "invalid regulator ID specified\n"); | |
7eb6444f | 359 | return -EINVAL; |
08bf1c0a | 360 | } |
c172708d MB |
361 | |
362 | config.dev = &pdev->dev; | |
c172708d | 363 | config.driver_data = regulator; |
0d481f74 | 364 | config.regmap = da9052->regmap; |
88c84c14 YCLP |
365 | if (pdata && pdata->regulators) { |
366 | config.init_data = pdata->regulators[pdev->id]; | |
367 | } else { | |
368 | #ifdef CONFIG_OF | |
c92f5dd2 | 369 | struct device_node *nproot, *np; |
88c84c14 | 370 | |
c92f5dd2 | 371 | nproot = of_node_get(da9052->dev->of_node); |
88c84c14 YCLP |
372 | if (!nproot) |
373 | return -ENODEV; | |
374 | ||
375 | nproot = of_find_node_by_name(nproot, "regulators"); | |
376 | if (!nproot) | |
377 | return -ENODEV; | |
378 | ||
b86bbddd | 379 | for_each_child_of_node(nproot, np) { |
88c84c14 YCLP |
380 | if (!of_node_cmp(np->name, |
381 | regulator->info->reg_desc.name)) { | |
382 | config.init_data = of_get_regulator_init_data( | |
383 | &pdev->dev, np); | |
e76b9cc7 | 384 | config.of_node = np; |
88c84c14 YCLP |
385 | break; |
386 | } | |
387 | } | |
c92f5dd2 | 388 | of_node_put(nproot); |
88c84c14 YCLP |
389 | #endif |
390 | } | |
c172708d | 391 | |
08bf1c0a | 392 | regulator->rdev = regulator_register(®ulator->info->reg_desc, |
c172708d | 393 | &config); |
08bf1c0a AJ |
394 | if (IS_ERR(regulator->rdev)) { |
395 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
396 | regulator->info->reg_desc.name); | |
7eb6444f | 397 | return PTR_ERR(regulator->rdev); |
08bf1c0a AJ |
398 | } |
399 | ||
400 | platform_set_drvdata(pdev, regulator); | |
401 | ||
402 | return 0; | |
08bf1c0a AJ |
403 | } |
404 | ||
8dc995f5 | 405 | static int da9052_regulator_remove(struct platform_device *pdev) |
08bf1c0a AJ |
406 | { |
407 | struct da9052_regulator *regulator = platform_get_drvdata(pdev); | |
408 | ||
409 | regulator_unregister(regulator->rdev); | |
08bf1c0a AJ |
410 | return 0; |
411 | } | |
412 | ||
413 | static struct platform_driver da9052_regulator_driver = { | |
414 | .probe = da9052_regulator_probe, | |
5eb9f2b9 | 415 | .remove = da9052_regulator_remove, |
08bf1c0a AJ |
416 | .driver = { |
417 | .name = "da9052-regulator", | |
418 | .owner = THIS_MODULE, | |
419 | }, | |
420 | }; | |
421 | ||
422 | static int __init da9052_regulator_init(void) | |
423 | { | |
424 | return platform_driver_register(&da9052_regulator_driver); | |
425 | } | |
426 | subsys_initcall(da9052_regulator_init); | |
427 | ||
428 | static void __exit da9052_regulator_exit(void) | |
429 | { | |
430 | platform_driver_unregister(&da9052_regulator_driver); | |
431 | } | |
432 | module_exit(da9052_regulator_exit); | |
433 | ||
434 | MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); | |
435 | MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC"); | |
436 | MODULE_LICENSE("GPL"); | |
437 | MODULE_ALIAS("platform:da9052-regulator"); |