Commit | Line | Data |
---|---|---|
33036f48 | 1 | /* |
50a03e35 BG |
2 | * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs |
3 | * | |
4 | * http://www.active-semi.com/products/power-management-units/act88xx/ | |
33036f48 WY |
5 | * |
6 | * Copyright (C) 2013 Atmel Corporation | |
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 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/i2c.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/regulator/driver.h> | |
25 | #include <linux/regulator/act8865.h> | |
26 | #include <linux/of.h> | |
27 | #include <linux/of_device.h> | |
28 | #include <linux/regulator/of_regulator.h> | |
29 | #include <linux/regmap.h> | |
30 | ||
ac0c0ea8 BG |
31 | /* |
32 | * ACT8846 Global Register Map. | |
33 | */ | |
34 | #define ACT8846_SYS0 0x00 | |
35 | #define ACT8846_SYS1 0x01 | |
36 | #define ACT8846_REG1_VSET 0x10 | |
37 | #define ACT8846_REG1_CTRL 0x12 | |
38 | #define ACT8846_REG2_VSET0 0x20 | |
39 | #define ACT8846_REG2_VSET1 0x21 | |
40 | #define ACT8846_REG2_CTRL 0x22 | |
41 | #define ACT8846_REG3_VSET0 0x30 | |
42 | #define ACT8846_REG3_VSET1 0x31 | |
43 | #define ACT8846_REG3_CTRL 0x32 | |
44 | #define ACT8846_REG4_VSET0 0x40 | |
45 | #define ACT8846_REG4_VSET1 0x41 | |
46 | #define ACT8846_REG4_CTRL 0x42 | |
47 | #define ACT8846_REG5_VSET 0x50 | |
48 | #define ACT8846_REG5_CTRL 0x51 | |
49 | #define ACT8846_REG6_VSET 0x58 | |
50 | #define ACT8846_REG6_CTRL 0x59 | |
51 | #define ACT8846_REG7_VSET 0x60 | |
52 | #define ACT8846_REG7_CTRL 0x61 | |
53 | #define ACT8846_REG8_VSET 0x68 | |
54 | #define ACT8846_REG8_CTRL 0x69 | |
55 | #define ACT8846_REG9_VSET 0x70 | |
56 | #define ACT8846_REG9_CTRL 0x71 | |
57 | #define ACT8846_REG10_VSET 0x80 | |
58 | #define ACT8846_REG10_CTRL 0x81 | |
59 | #define ACT8846_REG11_VSET 0x90 | |
60 | #define ACT8846_REG11_CTRL 0x91 | |
61 | #define ACT8846_REG12_VSET 0xa0 | |
62 | #define ACT8846_REG12_CTRL 0xa1 | |
63 | #define ACT8846_REG13_CTRL 0xb1 | |
2b17fa28 RP |
64 | #define ACT8846_GLB_OFF_CTRL 0xc3 |
65 | #define ACT8846_OFF_SYSMASK 0x18 | |
ac0c0ea8 | 66 | |
33036f48 WY |
67 | /* |
68 | * ACT8865 Global Register Map. | |
69 | */ | |
70 | #define ACT8865_SYS_MODE 0x00 | |
71 | #define ACT8865_SYS_CTRL 0x01 | |
72 | #define ACT8865_DCDC1_VSET1 0x20 | |
73 | #define ACT8865_DCDC1_VSET2 0x21 | |
74 | #define ACT8865_DCDC1_CTRL 0x22 | |
75 | #define ACT8865_DCDC2_VSET1 0x30 | |
76 | #define ACT8865_DCDC2_VSET2 0x31 | |
77 | #define ACT8865_DCDC2_CTRL 0x32 | |
78 | #define ACT8865_DCDC3_VSET1 0x40 | |
79 | #define ACT8865_DCDC3_VSET2 0x41 | |
80 | #define ACT8865_DCDC3_CTRL 0x42 | |
81 | #define ACT8865_LDO1_VSET 0x50 | |
82 | #define ACT8865_LDO1_CTRL 0x51 | |
83 | #define ACT8865_LDO2_VSET 0x54 | |
84 | #define ACT8865_LDO2_CTRL 0x55 | |
85 | #define ACT8865_LDO3_VSET 0x60 | |
86 | #define ACT8865_LDO3_CTRL 0x61 | |
87 | #define ACT8865_LDO4_VSET 0x64 | |
88 | #define ACT8865_LDO4_CTRL 0x65 | |
2b17fa28 | 89 | #define ACT8865_MSTROFF 0x20 |
33036f48 WY |
90 | |
91 | /* | |
92 | * Field Definitions. | |
93 | */ | |
94 | #define ACT8865_ENA 0x80 /* ON - [7] */ | |
95 | #define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */ | |
96 | ||
97 | /* | |
98 | * ACT8865 voltage number | |
99 | */ | |
100 | #define ACT8865_VOLTAGE_NUM 64 | |
101 | ||
102 | struct act8865 { | |
33036f48 | 103 | struct regmap *regmap; |
2b17fa28 RP |
104 | int off_reg; |
105 | int off_mask; | |
33036f48 WY |
106 | }; |
107 | ||
108 | static const struct regmap_config act8865_regmap_config = { | |
109 | .reg_bits = 8, | |
110 | .val_bits = 8, | |
111 | }; | |
112 | ||
50a03e35 | 113 | static const struct regulator_linear_range act8865_voltage_ranges[] = { |
33036f48 WY |
114 | REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), |
115 | REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), | |
116 | REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), | |
117 | }; | |
118 | ||
119 | static struct regulator_ops act8865_ops = { | |
120 | .list_voltage = regulator_list_voltage_linear_range, | |
121 | .map_voltage = regulator_map_voltage_linear_range, | |
122 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
123 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
124 | .enable = regulator_enable_regmap, | |
125 | .disable = regulator_disable_regmap, | |
126 | .is_enabled = regulator_is_enabled_regmap, | |
33036f48 WY |
127 | }; |
128 | ||
50a03e35 BG |
129 | #define ACT88xx_REG(_name, _family, _id, _vsel_reg) \ |
130 | [_family##_ID_##_id] = { \ | |
131 | .name = _name, \ | |
132 | .id = _family##_ID_##_id, \ | |
133 | .type = REGULATOR_VOLTAGE, \ | |
134 | .ops = &act8865_ops, \ | |
135 | .n_voltages = ACT8865_VOLTAGE_NUM, \ | |
136 | .linear_ranges = act8865_voltage_ranges, \ | |
137 | .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \ | |
138 | .vsel_reg = _family##_##_id##_##_vsel_reg, \ | |
139 | .vsel_mask = ACT8865_VSEL_MASK, \ | |
140 | .enable_reg = _family##_##_id##_CTRL, \ | |
141 | .enable_mask = ACT8865_ENA, \ | |
142 | .owner = THIS_MODULE, \ | |
143 | } | |
144 | ||
ac0c0ea8 BG |
145 | static const struct regulator_desc act8846_regulators[] = { |
146 | ACT88xx_REG("REG1", ACT8846, REG1, VSET), | |
147 | ACT88xx_REG("REG2", ACT8846, REG2, VSET0), | |
148 | ACT88xx_REG("REG3", ACT8846, REG3, VSET0), | |
149 | ACT88xx_REG("REG4", ACT8846, REG4, VSET0), | |
150 | ACT88xx_REG("REG5", ACT8846, REG5, VSET), | |
151 | ACT88xx_REG("REG6", ACT8846, REG6, VSET), | |
152 | ACT88xx_REG("REG7", ACT8846, REG7, VSET), | |
153 | ACT88xx_REG("REG8", ACT8846, REG8, VSET), | |
154 | ACT88xx_REG("REG9", ACT8846, REG9, VSET), | |
155 | ACT88xx_REG("REG10", ACT8846, REG10, VSET), | |
156 | ACT88xx_REG("REG11", ACT8846, REG11, VSET), | |
157 | ACT88xx_REG("REG12", ACT8846, REG12, VSET), | |
158 | }; | |
159 | ||
50a03e35 BG |
160 | static const struct regulator_desc act8865_regulators[] = { |
161 | ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1), | |
162 | ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1), | |
163 | ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1), | |
164 | ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET), | |
165 | ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET), | |
166 | ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET), | |
167 | ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET), | |
33036f48 WY |
168 | }; |
169 | ||
170 | #ifdef CONFIG_OF | |
171 | static const struct of_device_id act8865_dt_ids[] = { | |
ac0c0ea8 | 172 | { .compatible = "active-semi,act8846", .data = (void *)ACT8846 }, |
50a03e35 | 173 | { .compatible = "active-semi,act8865", .data = (void *)ACT8865 }, |
33036f48 WY |
174 | { } |
175 | }; | |
176 | MODULE_DEVICE_TABLE(of, act8865_dt_ids); | |
177 | ||
ac0c0ea8 BG |
178 | static struct of_regulator_match act8846_matches[] = { |
179 | [ACT8846_ID_REG1] = { .name = "REG1" }, | |
180 | [ACT8846_ID_REG2] = { .name = "REG2" }, | |
181 | [ACT8846_ID_REG3] = { .name = "REG3" }, | |
182 | [ACT8846_ID_REG4] = { .name = "REG4" }, | |
183 | [ACT8846_ID_REG5] = { .name = "REG5" }, | |
184 | [ACT8846_ID_REG6] = { .name = "REG6" }, | |
185 | [ACT8846_ID_REG7] = { .name = "REG7" }, | |
186 | [ACT8846_ID_REG8] = { .name = "REG8" }, | |
187 | [ACT8846_ID_REG9] = { .name = "REG9" }, | |
188 | [ACT8846_ID_REG10] = { .name = "REG10" }, | |
189 | [ACT8846_ID_REG11] = { .name = "REG11" }, | |
190 | [ACT8846_ID_REG12] = { .name = "REG12" }, | |
191 | }; | |
192 | ||
33036f48 WY |
193 | static struct of_regulator_match act8865_matches[] = { |
194 | [ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"}, | |
195 | [ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"}, | |
196 | [ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"}, | |
197 | [ACT8865_ID_LDO1] = { .name = "LDO_REG1"}, | |
198 | [ACT8865_ID_LDO2] = { .name = "LDO_REG2"}, | |
199 | [ACT8865_ID_LDO3] = { .name = "LDO_REG3"}, | |
200 | [ACT8865_ID_LDO4] = { .name = "LDO_REG4"}, | |
201 | }; | |
202 | ||
203 | static int act8865_pdata_from_dt(struct device *dev, | |
204 | struct device_node **of_node, | |
50a03e35 | 205 | struct act8865_platform_data *pdata, |
34e0247f | 206 | unsigned long type) |
33036f48 | 207 | { |
34e0247f | 208 | int matched, i, num_matches; |
33036f48 WY |
209 | struct device_node *np; |
210 | struct act8865_regulator_data *regulator; | |
34e0247f | 211 | struct of_regulator_match *matches; |
33036f48 | 212 | |
6ea970a9 | 213 | np = of_get_child_by_name(dev->of_node, "regulators"); |
33036f48 WY |
214 | if (!np) { |
215 | dev_err(dev, "missing 'regulators' subnode in DT\n"); | |
216 | return -EINVAL; | |
217 | } | |
218 | ||
34e0247f BG |
219 | switch (type) { |
220 | case ACT8846: | |
221 | matches = act8846_matches; | |
222 | num_matches = ARRAY_SIZE(act8846_matches); | |
223 | break; | |
224 | case ACT8865: | |
225 | matches = act8865_matches; | |
226 | num_matches = ARRAY_SIZE(act8865_matches); | |
227 | break; | |
228 | default: | |
229 | dev_err(dev, "invalid device id %lu\n", type); | |
230 | return -EINVAL; | |
231 | } | |
232 | ||
50a03e35 | 233 | matched = of_regulator_match(dev, np, matches, num_matches); |
0079eb53 | 234 | of_node_put(np); |
33036f48 WY |
235 | if (matched <= 0) |
236 | return matched; | |
237 | ||
238 | pdata->regulators = devm_kzalloc(dev, | |
50a03e35 BG |
239 | sizeof(struct act8865_regulator_data) * |
240 | num_matches, GFP_KERNEL); | |
5ee77ef2 | 241 | if (!pdata->regulators) |
33036f48 | 242 | return -ENOMEM; |
33036f48 | 243 | |
50a03e35 | 244 | pdata->num_regulators = num_matches; |
33036f48 WY |
245 | regulator = pdata->regulators; |
246 | ||
50a03e35 | 247 | for (i = 0; i < num_matches; i++) { |
33036f48 | 248 | regulator->id = i; |
50a03e35 BG |
249 | regulator->name = matches[i].name; |
250 | regulator->platform_data = matches[i].init_data; | |
251 | of_node[i] = matches[i].of_node; | |
33036f48 WY |
252 | regulator++; |
253 | } | |
254 | ||
255 | return 0; | |
256 | } | |
257 | #else | |
258 | static inline int act8865_pdata_from_dt(struct device *dev, | |
259 | struct device_node **of_node, | |
34e0247f BG |
260 | struct act8865_platform_data *pdata, |
261 | unsigned long type) | |
33036f48 WY |
262 | { |
263 | return 0; | |
264 | } | |
265 | #endif | |
266 | ||
48a1e1b5 BG |
267 | static struct regulator_init_data |
268 | *act8865_get_init_data(int id, struct act8865_platform_data *pdata) | |
269 | { | |
270 | int i; | |
271 | ||
272 | if (!pdata) | |
273 | return NULL; | |
274 | ||
275 | for (i = 0; i < pdata->num_regulators; i++) { | |
276 | if (pdata->regulators[i].id == id) | |
277 | return pdata->regulators[i].platform_data; | |
278 | } | |
279 | ||
280 | return NULL; | |
281 | } | |
282 | ||
2b17fa28 RP |
283 | static struct i2c_client *act8865_i2c_client; |
284 | static void act8865_power_off(void) | |
285 | { | |
286 | struct act8865 *act8865; | |
287 | ||
288 | act8865 = i2c_get_clientdata(act8865_i2c_client); | |
289 | regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask); | |
290 | while (1); | |
291 | } | |
292 | ||
33036f48 | 293 | static int act8865_pmic_probe(struct i2c_client *client, |
50a03e35 | 294 | const struct i2c_device_id *i2c_id) |
33036f48 | 295 | { |
50a03e35 BG |
296 | static const struct regulator_desc *regulators; |
297 | struct act8865_platform_data pdata_of, *pdata; | |
33036f48 | 298 | struct device *dev = &client->dev; |
50a03e35 BG |
299 | struct device_node **of_node; |
300 | int i, ret, num_regulators; | |
33036f48 | 301 | struct act8865 *act8865; |
50a03e35 | 302 | unsigned long type; |
2b17fa28 | 303 | int off_reg, off_mask; |
50a03e35 BG |
304 | |
305 | pdata = dev_get_platdata(dev); | |
33036f48 WY |
306 | |
307 | if (dev->of_node && !pdata) { | |
308 | const struct of_device_id *id; | |
33036f48 WY |
309 | |
310 | id = of_match_device(of_match_ptr(act8865_dt_ids), dev); | |
311 | if (!id) | |
312 | return -ENODEV; | |
313 | ||
50a03e35 BG |
314 | type = (unsigned long) id->data; |
315 | } else { | |
316 | type = i2c_id->driver_data; | |
317 | } | |
318 | ||
319 | switch (type) { | |
ac0c0ea8 | 320 | case ACT8846: |
ac0c0ea8 BG |
321 | regulators = act8846_regulators; |
322 | num_regulators = ARRAY_SIZE(act8846_regulators); | |
2b17fa28 RP |
323 | off_reg = ACT8846_GLB_OFF_CTRL; |
324 | off_mask = ACT8846_OFF_SYSMASK; | |
ac0c0ea8 | 325 | break; |
50a03e35 | 326 | case ACT8865: |
50a03e35 BG |
327 | regulators = act8865_regulators; |
328 | num_regulators = ARRAY_SIZE(act8865_regulators); | |
2b17fa28 RP |
329 | off_reg = ACT8865_SYS_CTRL; |
330 | off_mask = ACT8865_MSTROFF; | |
50a03e35 BG |
331 | break; |
332 | default: | |
333 | dev_err(dev, "invalid device id %lu\n", type); | |
334 | return -EINVAL; | |
335 | } | |
336 | ||
337 | of_node = devm_kzalloc(dev, sizeof(struct device_node *) * | |
338 | num_regulators, GFP_KERNEL); | |
339 | if (!of_node) | |
340 | return -ENOMEM; | |
341 | ||
342 | if (dev->of_node && !pdata) { | |
34e0247f | 343 | ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type); |
33036f48 WY |
344 | if (ret < 0) |
345 | return ret; | |
346 | ||
347 | pdata = &pdata_of; | |
348 | } | |
349 | ||
50a03e35 BG |
350 | if (pdata->num_regulators > num_regulators) { |
351 | dev_err(dev, "too many regulators: %d\n", | |
352 | pdata->num_regulators); | |
33036f48 WY |
353 | return -EINVAL; |
354 | } | |
355 | ||
f1de2c2f | 356 | act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL); |
33036f48 WY |
357 | if (!act8865) |
358 | return -ENOMEM; | |
359 | ||
33036f48 WY |
360 | act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config); |
361 | if (IS_ERR(act8865->regmap)) { | |
40d3bc19 | 362 | ret = PTR_ERR(act8865->regmap); |
33036f48 | 363 | dev_err(&client->dev, "Failed to allocate register map: %d\n", |
40d3bc19 AL |
364 | ret); |
365 | return ret; | |
33036f48 WY |
366 | } |
367 | ||
2b17fa28 RP |
368 | if (of_system_has_poweroff_source(dev->of_node)) { |
369 | if (!pm_power_off) { | |
370 | act8865_i2c_client = client; | |
371 | act8865->off_reg = off_reg; | |
372 | act8865->off_mask = off_mask; | |
373 | pm_power_off = act8865_power_off; | |
374 | } else { | |
375 | dev_err(dev, "Failed to set poweroff capability, already defined\n"); | |
376 | } | |
377 | } | |
378 | ||
33036f48 | 379 | /* Finally register devices */ |
50a03e35 BG |
380 | for (i = 0; i < num_regulators; i++) { |
381 | const struct regulator_desc *desc = ®ulators[i]; | |
382 | struct regulator_config config = { }; | |
383 | struct regulator_dev *rdev; | |
33036f48 WY |
384 | |
385 | config.dev = dev; | |
48a1e1b5 | 386 | config.init_data = act8865_get_init_data(desc->id, pdata); |
33036f48 WY |
387 | config.of_node = of_node[i]; |
388 | config.driver_data = act8865; | |
389 | config.regmap = act8865->regmap; | |
390 | ||
48a1e1b5 | 391 | rdev = devm_regulator_register(&client->dev, desc, &config); |
fb8eb454 | 392 | if (IS_ERR(rdev)) { |
48a1e1b5 | 393 | dev_err(dev, "failed to register %s\n", desc->name); |
fb8eb454 | 394 | return PTR_ERR(rdev); |
33036f48 WY |
395 | } |
396 | } | |
397 | ||
398 | i2c_set_clientdata(client, act8865); | |
50a03e35 | 399 | devm_kfree(dev, of_node); |
33036f48 WY |
400 | |
401 | return 0; | |
402 | } | |
403 | ||
33036f48 | 404 | static const struct i2c_device_id act8865_ids[] = { |
ac0c0ea8 | 405 | { .name = "act8846", .driver_data = ACT8846 }, |
50a03e35 | 406 | { .name = "act8865", .driver_data = ACT8865 }, |
33036f48 WY |
407 | { }, |
408 | }; | |
409 | MODULE_DEVICE_TABLE(i2c, act8865_ids); | |
410 | ||
411 | static struct i2c_driver act8865_pmic_driver = { | |
412 | .driver = { | |
413 | .name = "act8865", | |
414 | .owner = THIS_MODULE, | |
415 | }, | |
416 | .probe = act8865_pmic_probe, | |
33036f48 WY |
417 | .id_table = act8865_ids, |
418 | }; | |
419 | ||
420 | module_i2c_driver(act8865_pmic_driver); | |
421 | ||
50a03e35 | 422 | MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver"); |
33036f48 WY |
423 | MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); |
424 | MODULE_LICENSE("GPL v2"); |