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0376148f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d1a82001 LJ |
2 | /* |
3 | * Copyright (C) ST-Ericsson SA 2010 | |
4 | * | |
d1a82001 LJ |
5 | * Authors: Bengt Jonsson <bengt.g.jonsson@stericsson.com> |
6 | * | |
7 | * This file is based on drivers/regulator/ab8500.c | |
8 | * | |
9 | * AB8500 external regulators | |
10 | * | |
11 | * ab8500-ext supports the following regulators: | |
12 | * - VextSupply3 | |
13 | */ | |
14 | #include <linux/init.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/module.h> | |
30aa4b26 | 18 | #include <linux/of.h> |
d1a82001 LJ |
19 | #include <linux/platform_device.h> |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/regulator/machine.h> | |
30aa4b26 | 22 | #include <linux/regulator/of_regulator.h> |
d1a82001 LJ |
23 | #include <linux/mfd/abx500.h> |
24 | #include <linux/mfd/abx500/ab8500.h> | |
3acb64c0 LW |
25 | |
26 | /* AB8500 external regulators */ | |
27 | enum ab8500_ext_regulator_id { | |
28 | AB8500_EXT_SUPPLY1, | |
29 | AB8500_EXT_SUPPLY2, | |
30 | AB8500_EXT_SUPPLY3, | |
31 | AB8500_NUM_EXT_REGULATORS, | |
32 | }; | |
33 | ||
34 | struct ab8500_ext_regulator_cfg { | |
35 | bool hwreq; /* requires hw mode or high power mode */ | |
36 | }; | |
d1a82001 | 37 | |
79886be0 AB |
38 | /* supply for VextSupply3 */ |
39 | static struct regulator_consumer_supply ab8500_ext_supply3_consumers[] = { | |
40 | /* SIM supply for 3 V SIM cards */ | |
41 | REGULATOR_SUPPLY("vinvsim", "sim-detect.0"), | |
42 | }; | |
43 | ||
44 | /* | |
45 | * AB8500 external regulators | |
46 | */ | |
47 | static struct regulator_init_data ab8500_ext_regulators[] = { | |
48 | /* fixed Vbat supplies VSMPS1_EXT_1V8 */ | |
49 | [AB8500_EXT_SUPPLY1] = { | |
50 | .constraints = { | |
51 | .name = "ab8500-ext-supply1", | |
52 | .min_uV = 1800000, | |
53 | .max_uV = 1800000, | |
54 | .initial_mode = REGULATOR_MODE_IDLE, | |
55 | .boot_on = 1, | |
56 | .always_on = 1, | |
57 | }, | |
58 | }, | |
59 | /* fixed Vbat supplies VSMPS2_EXT_1V36 and VSMPS5_EXT_1V15 */ | |
60 | [AB8500_EXT_SUPPLY2] = { | |
61 | .constraints = { | |
62 | .name = "ab8500-ext-supply2", | |
63 | .min_uV = 1360000, | |
64 | .max_uV = 1360000, | |
65 | }, | |
66 | }, | |
67 | /* fixed Vbat supplies VSMPS3_EXT_3V4 and VSMPS4_EXT_3V4 */ | |
68 | [AB8500_EXT_SUPPLY3] = { | |
69 | .constraints = { | |
70 | .name = "ab8500-ext-supply3", | |
71 | .min_uV = 3400000, | |
72 | .max_uV = 3400000, | |
73 | .valid_ops_mask = REGULATOR_CHANGE_STATUS, | |
74 | .boot_on = 1, | |
75 | }, | |
76 | .num_consumer_supplies = | |
77 | ARRAY_SIZE(ab8500_ext_supply3_consumers), | |
78 | .consumer_supplies = ab8500_ext_supply3_consumers, | |
79 | }, | |
80 | }; | |
81 | ||
d1a82001 LJ |
82 | /** |
83 | * struct ab8500_ext_regulator_info - ab8500 regulator information | |
84 | * @dev: device pointer | |
85 | * @desc: regulator description | |
18bc2b39 | 86 | * @cfg: regulator configuration (extension of regulator FW configuration) |
d1a82001 LJ |
87 | * @update_bank: bank to control on/off |
88 | * @update_reg: register to control on/off | |
89 | * @update_mask: mask to enable/disable and set mode of regulator | |
90 | * @update_val: bits holding the regulator current mode | |
18bc2b39 | 91 | * @update_val_hp: bits to set EN pin active (LPn pin deactive) |
d1a82001 | 92 | * normally this means high power mode |
18bc2b39 BJ |
93 | * @update_val_lp: bits to set EN pin active and LPn pin active |
94 | * normally this means low power mode | |
95 | * @update_val_hw: bits to set regulator pins in HW control | |
96 | * SysClkReq pins and logic will choose mode | |
d1a82001 LJ |
97 | */ |
98 | struct ab8500_ext_regulator_info { | |
99 | struct device *dev; | |
100 | struct regulator_desc desc; | |
18bc2b39 | 101 | struct ab8500_ext_regulator_cfg *cfg; |
d1a82001 LJ |
102 | u8 update_bank; |
103 | u8 update_reg; | |
104 | u8 update_mask; | |
105 | u8 update_val; | |
18bc2b39 BJ |
106 | u8 update_val_hp; |
107 | u8 update_val_lp; | |
108 | u8 update_val_hw; | |
d1a82001 LJ |
109 | }; |
110 | ||
7384744d | 111 | static int ab8500_ext_regulator_enable(struct regulator_dev *rdev) |
d1a82001 LJ |
112 | { |
113 | int ret; | |
7384744d AL |
114 | struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev); |
115 | u8 regval; | |
d1a82001 | 116 | |
7384744d AL |
117 | if (info == NULL) { |
118 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
119 | return -EINVAL; | |
120 | } | |
18bc2b39 BJ |
121 | |
122 | /* | |
123 | * To satisfy both HW high power request and SW request, the regulator | |
124 | * must be on in high power. | |
125 | */ | |
126 | if (info->cfg && info->cfg->hwreq) | |
7384744d AL |
127 | regval = info->update_val_hp; |
128 | else | |
129 | regval = info->update_val; | |
d1a82001 LJ |
130 | |
131 | ret = abx500_mask_and_set_register_interruptible(info->dev, | |
132 | info->update_bank, info->update_reg, | |
7384744d | 133 | info->update_mask, regval); |
37daa8ae | 134 | if (ret < 0) { |
80a9c22a | 135 | dev_err(rdev_get_dev(rdev), |
d1a82001 | 136 | "couldn't set enable bits for regulator\n"); |
37daa8ae AL |
137 | return ret; |
138 | } | |
d1a82001 | 139 | |
7384744d AL |
140 | dev_dbg(rdev_get_dev(rdev), |
141 | "%s-enable (bank, reg, mask, value): 0x%02x, 0x%02x, 0x%02x, 0x%02x\n", | |
142 | info->desc.name, info->update_bank, info->update_reg, | |
143 | info->update_mask, regval); | |
144 | ||
145 | return 0; | |
d1a82001 LJ |
146 | } |
147 | ||
7384744d | 148 | static int ab8500_ext_regulator_disable(struct regulator_dev *rdev) |
d1a82001 LJ |
149 | { |
150 | int ret; | |
151 | struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev); | |
18bc2b39 | 152 | u8 regval; |
d1a82001 LJ |
153 | |
154 | if (info == NULL) { | |
155 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
156 | return -EINVAL; | |
157 | } | |
158 | ||
18bc2b39 BJ |
159 | /* |
160 | * Set the regulator in HW request mode if configured | |
161 | */ | |
162 | if (info->cfg && info->cfg->hwreq) | |
7384744d AL |
163 | regval = info->update_val_hw; |
164 | else | |
165 | regval = 0; | |
18bc2b39 | 166 | |
d1a82001 LJ |
167 | ret = abx500_mask_and_set_register_interruptible(info->dev, |
168 | info->update_bank, info->update_reg, | |
7384744d | 169 | info->update_mask, regval); |
37daa8ae | 170 | if (ret < 0) { |
80a9c22a | 171 | dev_err(rdev_get_dev(rdev), |
d1a82001 | 172 | "couldn't set disable bits for regulator\n"); |
37daa8ae AL |
173 | return ret; |
174 | } | |
d1a82001 | 175 | |
d1a82001 LJ |
176 | dev_dbg(rdev_get_dev(rdev), "%s-disable (bank, reg, mask, value):" |
177 | " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n", | |
178 | info->desc.name, info->update_bank, info->update_reg, | |
18bc2b39 | 179 | info->update_mask, regval); |
d1a82001 | 180 | |
7384744d | 181 | return 0; |
d1a82001 LJ |
182 | } |
183 | ||
184 | static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev) | |
185 | { | |
186 | int ret; | |
187 | struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev); | |
188 | u8 regval; | |
189 | ||
190 | if (info == NULL) { | |
191 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | ret = abx500_get_register_interruptible(info->dev, | |
196 | info->update_bank, info->update_reg, ®val); | |
197 | if (ret < 0) { | |
198 | dev_err(rdev_get_dev(rdev), | |
199 | "couldn't read 0x%x register\n", info->update_reg); | |
200 | return ret; | |
201 | } | |
202 | ||
203 | dev_dbg(rdev_get_dev(rdev), "%s-is_enabled (bank, reg, mask, value):" | |
204 | " 0x%02x, 0x%02x, 0x%02x, 0x%02x\n", | |
205 | info->desc.name, info->update_bank, info->update_reg, | |
206 | info->update_mask, regval); | |
207 | ||
18bc2b39 BJ |
208 | if (((regval & info->update_mask) == info->update_val_lp) || |
209 | ((regval & info->update_mask) == info->update_val_hp)) | |
9ab51a0e | 210 | return 1; |
d1a82001 | 211 | else |
9ab51a0e | 212 | return 0; |
d1a82001 LJ |
213 | } |
214 | ||
215 | static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev, | |
216 | unsigned int mode) | |
217 | { | |
218 | int ret = 0; | |
219 | struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev); | |
66511fa4 | 220 | u8 regval; |
d1a82001 LJ |
221 | |
222 | if (info == NULL) { | |
223 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
224 | return -EINVAL; | |
225 | } | |
226 | ||
227 | switch (mode) { | |
228 | case REGULATOR_MODE_NORMAL: | |
66511fa4 | 229 | regval = info->update_val_hp; |
d1a82001 LJ |
230 | break; |
231 | case REGULATOR_MODE_IDLE: | |
66511fa4 | 232 | regval = info->update_val_lp; |
d1a82001 LJ |
233 | break; |
234 | ||
235 | default: | |
236 | return -EINVAL; | |
237 | } | |
238 | ||
66511fa4 AL |
239 | /* If regulator is enabled and info->cfg->hwreq is set, the regulator |
240 | must be on in high power, so we don't need to write the register with | |
241 | the same value. | |
242 | */ | |
243 | if (ab8500_ext_regulator_is_enabled(rdev) && | |
244 | !(info->cfg && info->cfg->hwreq)) { | |
245 | ret = abx500_mask_and_set_register_interruptible(info->dev, | |
246 | info->update_bank, info->update_reg, | |
247 | info->update_mask, regval); | |
248 | if (ret < 0) { | |
d1a82001 LJ |
249 | dev_err(rdev_get_dev(rdev), |
250 | "Could not set regulator mode.\n"); | |
66511fa4 AL |
251 | return ret; |
252 | } | |
d1a82001 LJ |
253 | |
254 | dev_dbg(rdev_get_dev(rdev), | |
255 | "%s-set_mode (bank, reg, mask, value): " | |
256 | "0x%x, 0x%x, 0x%x, 0x%x\n", | |
257 | info->desc.name, info->update_bank, info->update_reg, | |
258 | info->update_mask, regval); | |
259 | } | |
260 | ||
66511fa4 AL |
261 | info->update_val = regval; |
262 | ||
263 | return 0; | |
d1a82001 LJ |
264 | } |
265 | ||
266 | static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev) | |
267 | { | |
268 | struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev); | |
269 | int ret; | |
270 | ||
271 | if (info == NULL) { | |
272 | dev_err(rdev_get_dev(rdev), "regulator info null pointer\n"); | |
273 | return -EINVAL; | |
274 | } | |
275 | ||
276 | if (info->update_val == info->update_val_hp) | |
277 | ret = REGULATOR_MODE_NORMAL; | |
278 | else if (info->update_val == info->update_val_lp) | |
279 | ret = REGULATOR_MODE_IDLE; | |
280 | else | |
281 | ret = -EINVAL; | |
282 | ||
283 | return ret; | |
284 | } | |
285 | ||
33fb8802 LJ |
286 | static int ab8500_ext_set_voltage(struct regulator_dev *rdev, int min_uV, |
287 | int max_uV, unsigned *selector) | |
288 | { | |
289 | struct regulation_constraints *regu_constraints = rdev->constraints; | |
290 | ||
291 | if (!regu_constraints) { | |
292 | dev_err(rdev_get_dev(rdev), "No regulator constraints\n"); | |
293 | return -EINVAL; | |
294 | } | |
295 | ||
296 | if (regu_constraints->min_uV == min_uV && | |
297 | regu_constraints->max_uV == max_uV) | |
298 | return 0; | |
299 | ||
300 | dev_err(rdev_get_dev(rdev), | |
301 | "Requested min %duV max %duV != constrained min %duV max %duV\n", | |
302 | min_uV, max_uV, | |
303 | regu_constraints->min_uV, regu_constraints->max_uV); | |
304 | ||
305 | return -EINVAL; | |
306 | } | |
307 | ||
d1a82001 LJ |
308 | static int ab8500_ext_list_voltage(struct regulator_dev *rdev, |
309 | unsigned selector) | |
310 | { | |
311 | struct regulation_constraints *regu_constraints = rdev->constraints; | |
312 | ||
313 | if (regu_constraints == NULL) { | |
314 | dev_err(rdev_get_dev(rdev), "regulator constraints null pointer\n"); | |
315 | return -EINVAL; | |
316 | } | |
317 | /* return the uV for the fixed regulators */ | |
318 | if (regu_constraints->min_uV && regu_constraints->max_uV) { | |
319 | if (regu_constraints->min_uV == regu_constraints->max_uV) | |
320 | return regu_constraints->min_uV; | |
321 | } | |
322 | return -EINVAL; | |
323 | } | |
324 | ||
8e5be4f7 | 325 | static const struct regulator_ops ab8500_ext_regulator_ops = { |
d1a82001 LJ |
326 | .enable = ab8500_ext_regulator_enable, |
327 | .disable = ab8500_ext_regulator_disable, | |
328 | .is_enabled = ab8500_ext_regulator_is_enabled, | |
329 | .set_mode = ab8500_ext_regulator_set_mode, | |
330 | .get_mode = ab8500_ext_regulator_get_mode, | |
33fb8802 | 331 | .set_voltage = ab8500_ext_set_voltage, |
d1a82001 LJ |
332 | .list_voltage = ab8500_ext_list_voltage, |
333 | }; | |
334 | ||
d1a82001 LJ |
335 | static struct ab8500_ext_regulator_info |
336 | ab8500_ext_regulator_info[AB8500_NUM_EXT_REGULATORS] = { | |
337 | [AB8500_EXT_SUPPLY1] = { | |
338 | .desc = { | |
339 | .name = "VEXTSUPPLY1", | |
48cb9737 | 340 | .of_match = of_match_ptr("ab8500_ext1"), |
d1a82001 LJ |
341 | .ops = &ab8500_ext_regulator_ops, |
342 | .type = REGULATOR_VOLTAGE, | |
343 | .id = AB8500_EXT_SUPPLY1, | |
344 | .owner = THIS_MODULE, | |
345 | .n_voltages = 1, | |
346 | }, | |
347 | .update_bank = 0x04, | |
348 | .update_reg = 0x08, | |
349 | .update_mask = 0x03, | |
350 | .update_val = 0x01, | |
351 | .update_val_hp = 0x01, | |
352 | .update_val_lp = 0x03, | |
353 | .update_val_hw = 0x02, | |
354 | }, | |
355 | [AB8500_EXT_SUPPLY2] = { | |
356 | .desc = { | |
357 | .name = "VEXTSUPPLY2", | |
48cb9737 | 358 | .of_match = of_match_ptr("ab8500_ext2"), |
d1a82001 LJ |
359 | .ops = &ab8500_ext_regulator_ops, |
360 | .type = REGULATOR_VOLTAGE, | |
361 | .id = AB8500_EXT_SUPPLY2, | |
362 | .owner = THIS_MODULE, | |
363 | .n_voltages = 1, | |
364 | }, | |
365 | .update_bank = 0x04, | |
366 | .update_reg = 0x08, | |
367 | .update_mask = 0x0c, | |
368 | .update_val = 0x04, | |
369 | .update_val_hp = 0x04, | |
370 | .update_val_lp = 0x0c, | |
371 | .update_val_hw = 0x08, | |
372 | }, | |
373 | [AB8500_EXT_SUPPLY3] = { | |
374 | .desc = { | |
375 | .name = "VEXTSUPPLY3", | |
48cb9737 | 376 | .of_match = of_match_ptr("ab8500_ext3"), |
d1a82001 LJ |
377 | .ops = &ab8500_ext_regulator_ops, |
378 | .type = REGULATOR_VOLTAGE, | |
379 | .id = AB8500_EXT_SUPPLY3, | |
380 | .owner = THIS_MODULE, | |
381 | .n_voltages = 1, | |
382 | }, | |
383 | .update_bank = 0x04, | |
384 | .update_reg = 0x08, | |
385 | .update_mask = 0x30, | |
386 | .update_val = 0x10, | |
18bc2b39 BJ |
387 | .update_val_hp = 0x10, |
388 | .update_val_lp = 0x30, | |
389 | .update_val_hw = 0x20, | |
d1a82001 LJ |
390 | }, |
391 | }; | |
392 | ||
08d49f43 | 393 | static int ab8500_ext_regulator_probe(struct platform_device *pdev) |
d1a82001 LJ |
394 | { |
395 | struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); | |
d1a82001 | 396 | struct regulator_config config = { }; |
80a9c22a | 397 | struct regulator_dev *rdev; |
48cb9737 | 398 | int i; |
30aa4b26 | 399 | |
d1a82001 LJ |
400 | if (!ab8500) { |
401 | dev_err(&pdev->dev, "null mfd parent\n"); | |
402 | return -EINVAL; | |
403 | } | |
30aa4b26 | 404 | |
d1a82001 | 405 | /* check for AB8500 2.x */ |
a6324709 | 406 | if (is_ab8500_2p0_or_earlier(ab8500)) { |
d1a82001 LJ |
407 | struct ab8500_ext_regulator_info *info; |
408 | ||
409 | /* VextSupply3LPn is inverted on AB8500 2.x */ | |
410 | info = &ab8500_ext_regulator_info[AB8500_EXT_SUPPLY3]; | |
411 | info->update_val = 0x30; | |
18bc2b39 BJ |
412 | info->update_val_hp = 0x30; |
413 | info->update_val_lp = 0x10; | |
d1a82001 LJ |
414 | } |
415 | ||
416 | /* register all regulators */ | |
417 | for (i = 0; i < ARRAY_SIZE(ab8500_ext_regulator_info); i++) { | |
418 | struct ab8500_ext_regulator_info *info = NULL; | |
419 | ||
420 | /* assign per-regulator data */ | |
421 | info = &ab8500_ext_regulator_info[i]; | |
422 | info->dev = &pdev->dev; | |
18bc2b39 | 423 | info->cfg = (struct ab8500_ext_regulator_cfg *) |
c512150b | 424 | ab8500_ext_regulators[i].driver_data; |
d1a82001 LJ |
425 | |
426 | config.dev = &pdev->dev; | |
d1a82001 | 427 | config.driver_data = info; |
c512150b | 428 | config.init_data = &ab8500_ext_regulators[i]; |
d1a82001 LJ |
429 | |
430 | /* register regulator with framework */ | |
80a9c22a AL |
431 | rdev = devm_regulator_register(&pdev->dev, &info->desc, |
432 | &config); | |
433 | if (IS_ERR(rdev)) { | |
d1a82001 LJ |
434 | dev_err(&pdev->dev, "failed to register regulator %s\n", |
435 | info->desc.name); | |
80a9c22a | 436 | return PTR_ERR(rdev); |
d1a82001 LJ |
437 | } |
438 | ||
80a9c22a | 439 | dev_dbg(&pdev->dev, "%s-probed\n", info->desc.name); |
d1a82001 LJ |
440 | } |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
5a49b4a5 LJ |
445 | static struct platform_driver ab8500_ext_regulator_driver = { |
446 | .probe = ab8500_ext_regulator_probe, | |
5a49b4a5 LJ |
447 | .driver = { |
448 | .name = "ab8500-ext-regulator", | |
5a49b4a5 LJ |
449 | }, |
450 | }; | |
451 | ||
452 | static int __init ab8500_ext_regulator_init(void) | |
453 | { | |
454 | int ret; | |
455 | ||
456 | ret = platform_driver_register(&ab8500_ext_regulator_driver); | |
457 | if (ret) | |
458 | pr_err("Failed to register ab8500 ext regulator: %d\n", ret); | |
459 | ||
460 | return ret; | |
461 | } | |
462 | subsys_initcall(ab8500_ext_regulator_init); | |
463 | ||
464 | static void __exit ab8500_ext_regulator_exit(void) | |
465 | { | |
466 | platform_driver_unregister(&ab8500_ext_regulator_driver); | |
d1a82001 | 467 | } |
5a49b4a5 | 468 | module_exit(ab8500_ext_regulator_exit); |
d1a82001 LJ |
469 | |
470 | MODULE_LICENSE("GPL v2"); | |
471 | MODULE_AUTHOR("Bengt Jonsson <bengt.g.jonsson@stericsson.com>"); | |
472 | MODULE_DESCRIPTION("AB8500 external regulator driver"); | |
473 | MODULE_ALIAS("platform:ab8500-ext-regulator"); |