Commit | Line | Data |
---|---|---|
c90456e3 JB |
1 | /* |
2 | * pv88090-regulator.c - Regulator device driver for PV88090 | |
3 | * Copyright (C) 2015 Powerventure Semiconductor Ltd. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version 2 | |
8 | * of the License, or (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | ||
16 | #include <linux/err.h> | |
c90456e3 JB |
17 | #include <linux/i2c.h> |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/regulator/driver.h> | |
22 | #include <linux/regulator/machine.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/irq.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/regulator/of_regulator.h> | |
c90456e3 JB |
27 | #include "pv88090-regulator.h" |
28 | ||
29 | #define PV88090_MAX_REGULATORS 5 | |
30 | ||
31 | /* PV88090 REGULATOR IDs */ | |
32 | enum { | |
33 | /* BUCKs */ | |
34 | PV88090_ID_BUCK1, | |
35 | PV88090_ID_BUCK2, | |
36 | PV88090_ID_BUCK3, | |
37 | ||
38 | /* LDOs */ | |
39 | PV88090_ID_LDO1, | |
40 | PV88090_ID_LDO2, | |
41 | }; | |
42 | ||
43 | struct pv88090_regulator { | |
44 | struct regulator_desc desc; | |
45 | /* Current limiting */ | |
8986a119 | 46 | unsigned int n_current_limits; |
c90456e3 JB |
47 | const int *current_limits; |
48 | unsigned int limit_mask; | |
49 | unsigned int conf; | |
50 | unsigned int conf2; | |
51 | }; | |
52 | ||
53 | struct pv88090 { | |
54 | struct device *dev; | |
55 | struct regmap *regmap; | |
56 | struct regulator_dev *rdev[PV88090_MAX_REGULATORS]; | |
57 | }; | |
58 | ||
59 | struct pv88090_buck_voltage { | |
60 | int min_uV; | |
61 | int max_uV; | |
62 | int uV_step; | |
63 | }; | |
64 | ||
65 | static const struct regmap_config pv88090_regmap_config = { | |
66 | .reg_bits = 8, | |
67 | .val_bits = 8, | |
68 | }; | |
69 | ||
70 | /* Current limits array (in uA) for BUCK1, BUCK2, BUCK3. | |
71 | * Entry indexes corresponds to register values. | |
72 | */ | |
73 | ||
74 | static const int pv88090_buck1_limits[] = { | |
75 | 220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000, | |
76 | 1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000, | |
77 | 3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000, | |
78 | 5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000 | |
79 | }; | |
80 | ||
81 | static const int pv88090_buck23_limits[] = { | |
82 | 1496000, 2393000, 3291000, 4189000 | |
83 | }; | |
84 | ||
85 | static const struct pv88090_buck_voltage pv88090_buck_vol[3] = { | |
86 | { | |
87 | .min_uV = 600000, | |
88 | .max_uV = 1393750, | |
89 | .uV_step = 6250, | |
90 | }, | |
91 | ||
92 | { | |
93 | .min_uV = 1400000, | |
94 | .max_uV = 2193750, | |
95 | .uV_step = 6250, | |
96 | }, | |
97 | { | |
98 | .min_uV = 1250000, | |
99 | .max_uV = 2837500, | |
100 | .uV_step = 12500, | |
101 | }, | |
102 | }; | |
103 | ||
104 | static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev) | |
105 | { | |
106 | struct pv88090_regulator *info = rdev_get_drvdata(rdev); | |
107 | unsigned int data; | |
108 | int ret, mode = 0; | |
109 | ||
110 | ret = regmap_read(rdev->regmap, info->conf, &data); | |
111 | if (ret < 0) | |
112 | return ret; | |
113 | ||
114 | switch (data & PV88090_BUCK1_MODE_MASK) { | |
115 | case PV88090_BUCK_MODE_SYNC: | |
116 | mode = REGULATOR_MODE_FAST; | |
117 | break; | |
118 | case PV88090_BUCK_MODE_AUTO: | |
119 | mode = REGULATOR_MODE_NORMAL; | |
120 | break; | |
121 | case PV88090_BUCK_MODE_SLEEP: | |
122 | mode = REGULATOR_MODE_STANDBY; | |
123 | break; | |
124 | } | |
125 | ||
126 | return mode; | |
127 | } | |
128 | ||
129 | static int pv88090_buck_set_mode(struct regulator_dev *rdev, | |
130 | unsigned int mode) | |
131 | { | |
132 | struct pv88090_regulator *info = rdev_get_drvdata(rdev); | |
133 | int val = 0; | |
134 | ||
135 | switch (mode) { | |
136 | case REGULATOR_MODE_FAST: | |
137 | val = PV88090_BUCK_MODE_SYNC; | |
138 | break; | |
139 | case REGULATOR_MODE_NORMAL: | |
140 | val = PV88090_BUCK_MODE_AUTO; | |
141 | break; | |
142 | case REGULATOR_MODE_STANDBY: | |
143 | val = PV88090_BUCK_MODE_SLEEP; | |
144 | break; | |
145 | default: | |
146 | return -EINVAL; | |
147 | } | |
148 | ||
149 | return regmap_update_bits(rdev->regmap, info->conf, | |
150 | PV88090_BUCK1_MODE_MASK, val); | |
151 | } | |
152 | ||
153 | static int pv88090_set_current_limit(struct regulator_dev *rdev, int min, | |
154 | int max) | |
155 | { | |
156 | struct pv88090_regulator *info = rdev_get_drvdata(rdev); | |
157 | int i; | |
158 | ||
159 | /* search for closest to maximum */ | |
160 | for (i = info->n_current_limits; i >= 0; i--) { | |
161 | if (min <= info->current_limits[i] | |
162 | && max >= info->current_limits[i]) { | |
163 | return regmap_update_bits(rdev->regmap, | |
164 | info->conf, | |
165 | info->limit_mask, | |
166 | i << PV88090_BUCK1_ILIM_SHIFT); | |
167 | } | |
168 | } | |
169 | ||
170 | return -EINVAL; | |
171 | } | |
172 | ||
173 | static int pv88090_get_current_limit(struct regulator_dev *rdev) | |
174 | { | |
175 | struct pv88090_regulator *info = rdev_get_drvdata(rdev); | |
176 | unsigned int data; | |
177 | int ret; | |
178 | ||
179 | ret = regmap_read(rdev->regmap, info->conf, &data); | |
180 | if (ret < 0) | |
181 | return ret; | |
182 | ||
183 | data = (data & info->limit_mask) >> PV88090_BUCK1_ILIM_SHIFT; | |
184 | return info->current_limits[data]; | |
185 | } | |
186 | ||
36fe20c7 | 187 | static const struct regulator_ops pv88090_buck_ops = { |
c90456e3 JB |
188 | .get_mode = pv88090_buck_get_mode, |
189 | .set_mode = pv88090_buck_set_mode, | |
190 | .enable = regulator_enable_regmap, | |
191 | .disable = regulator_disable_regmap, | |
192 | .is_enabled = regulator_is_enabled_regmap, | |
193 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
194 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
195 | .list_voltage = regulator_list_voltage_linear, | |
196 | .set_current_limit = pv88090_set_current_limit, | |
197 | .get_current_limit = pv88090_get_current_limit, | |
198 | }; | |
199 | ||
36fe20c7 | 200 | static const struct regulator_ops pv88090_ldo_ops = { |
c90456e3 JB |
201 | .enable = regulator_enable_regmap, |
202 | .disable = regulator_disable_regmap, | |
203 | .is_enabled = regulator_is_enabled_regmap, | |
204 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
205 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
206 | .list_voltage = regulator_list_voltage_linear, | |
207 | }; | |
208 | ||
209 | #define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \ | |
210 | {\ | |
211 | .desc = {\ | |
212 | .id = chip##_ID_##regl_name,\ | |
213 | .name = __stringify(chip##_##regl_name),\ | |
214 | .of_match = of_match_ptr(#regl_name),\ | |
215 | .regulators_node = of_match_ptr("regulators"),\ | |
216 | .type = REGULATOR_VOLTAGE,\ | |
217 | .owner = THIS_MODULE,\ | |
218 | .ops = &pv88090_buck_ops,\ | |
219 | .min_uV = min, \ | |
220 | .uV_step = step, \ | |
221 | .n_voltages = ((max) - (min))/(step) + 1, \ | |
222 | .enable_reg = PV88090_REG_##regl_name##_CONF0, \ | |
223 | .enable_mask = PV88090_##regl_name##_EN, \ | |
224 | .vsel_reg = PV88090_REG_##regl_name##_CONF0, \ | |
225 | .vsel_mask = PV88090_V##regl_name##_MASK, \ | |
226 | },\ | |
227 | .current_limits = limits_array, \ | |
228 | .n_current_limits = ARRAY_SIZE(limits_array), \ | |
229 | .limit_mask = PV88090_##regl_name##_ILIM_MASK, \ | |
230 | .conf = PV88090_REG_##regl_name##_CONF1, \ | |
231 | .conf2 = PV88090_REG_##regl_name##_CONF2, \ | |
232 | } | |
233 | ||
234 | #define PV88090_LDO(chip, regl_name, min, step, max) \ | |
235 | {\ | |
236 | .desc = {\ | |
237 | .id = chip##_ID_##regl_name,\ | |
238 | .name = __stringify(chip##_##regl_name),\ | |
239 | .of_match = of_match_ptr(#regl_name),\ | |
240 | .regulators_node = of_match_ptr("regulators"),\ | |
241 | .type = REGULATOR_VOLTAGE,\ | |
242 | .owner = THIS_MODULE,\ | |
243 | .ops = &pv88090_ldo_ops,\ | |
244 | .min_uV = min, \ | |
245 | .uV_step = step, \ | |
246 | .n_voltages = ((max) - (min))/(step) + 1, \ | |
247 | .enable_reg = PV88090_REG_##regl_name##_CONT, \ | |
248 | .enable_mask = PV88090_##regl_name##_EN, \ | |
249 | .vsel_reg = PV88090_REG_##regl_name##_CONT, \ | |
250 | .vsel_mask = PV88090_V##regl_name##_MASK, \ | |
251 | },\ | |
252 | } | |
253 | ||
254 | static struct pv88090_regulator pv88090_regulator_info[] = { | |
255 | PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750, | |
256 | pv88090_buck1_limits), | |
257 | PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750, | |
258 | pv88090_buck23_limits), | |
259 | PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750, | |
260 | pv88090_buck23_limits), | |
261 | PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000), | |
262 | PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000), | |
263 | }; | |
264 | ||
265 | static irqreturn_t pv88090_irq_handler(int irq, void *data) | |
266 | { | |
267 | struct pv88090 *chip = data; | |
268 | int i, reg_val, err, ret = IRQ_NONE; | |
269 | ||
270 | err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, ®_val); | |
271 | if (err < 0) | |
272 | goto error_i2c; | |
273 | ||
274 | if (reg_val & PV88090_E_VDD_FLT) { | |
275 | for (i = 0; i < PV88090_MAX_REGULATORS; i++) { | |
276 | if (chip->rdev[i] != NULL) { | |
277 | regulator_notifier_call_chain(chip->rdev[i], | |
278 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
279 | NULL); | |
280 | } | |
281 | } | |
282 | ||
623f7b93 JB |
283 | err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
284 | PV88090_E_VDD_FLT); | |
c90456e3 JB |
285 | if (err < 0) |
286 | goto error_i2c; | |
287 | ||
288 | ret = IRQ_HANDLED; | |
289 | } | |
290 | ||
291 | if (reg_val & PV88090_E_OVER_TEMP) { | |
292 | for (i = 0; i < PV88090_MAX_REGULATORS; i++) { | |
293 | if (chip->rdev[i] != NULL) { | |
294 | regulator_notifier_call_chain(chip->rdev[i], | |
295 | REGULATOR_EVENT_OVER_TEMP, | |
296 | NULL); | |
297 | } | |
298 | } | |
299 | ||
623f7b93 JB |
300 | err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
301 | PV88090_E_OVER_TEMP); | |
c90456e3 JB |
302 | if (err < 0) |
303 | goto error_i2c; | |
304 | ||
305 | ret = IRQ_HANDLED; | |
306 | } | |
307 | ||
308 | return ret; | |
309 | ||
310 | error_i2c: | |
311 | dev_err(chip->dev, "I2C error : %d\n", err); | |
312 | return IRQ_NONE; | |
313 | } | |
314 | ||
315 | /* | |
316 | * I2C driver interface functions | |
317 | */ | |
318 | static int pv88090_i2c_probe(struct i2c_client *i2c, | |
319 | const struct i2c_device_id *id) | |
320 | { | |
321 | struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); | |
322 | struct pv88090 *chip; | |
323 | struct regulator_config config = { }; | |
324 | int error, i, ret = 0; | |
325 | unsigned int conf2, range, index; | |
326 | ||
327 | chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL); | |
328 | if (!chip) | |
329 | return -ENOMEM; | |
330 | ||
331 | chip->dev = &i2c->dev; | |
332 | chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config); | |
333 | if (IS_ERR(chip->regmap)) { | |
334 | error = PTR_ERR(chip->regmap); | |
335 | dev_err(chip->dev, "Failed to allocate register map: %d\n", | |
336 | error); | |
337 | return error; | |
338 | } | |
339 | ||
340 | i2c_set_clientdata(i2c, chip); | |
341 | ||
342 | if (i2c->irq != 0) { | |
343 | ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF); | |
344 | if (ret < 0) { | |
345 | dev_err(chip->dev, | |
346 | "Failed to mask A reg: %d\n", ret); | |
347 | return ret; | |
348 | } | |
349 | ||
350 | ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF); | |
351 | if (ret < 0) { | |
352 | dev_err(chip->dev, | |
353 | "Failed to mask B reg: %d\n", ret); | |
354 | return ret; | |
355 | } | |
356 | ||
ecee988a | 357 | ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
c90456e3 JB |
358 | pv88090_irq_handler, |
359 | IRQF_TRIGGER_LOW|IRQF_ONESHOT, | |
360 | "pv88090", chip); | |
361 | if (ret != 0) { | |
362 | dev_err(chip->dev, "Failed to request IRQ: %d\n", | |
363 | i2c->irq); | |
364 | return ret; | |
365 | } | |
366 | ||
367 | ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A, | |
368 | PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0); | |
369 | if (ret < 0) { | |
370 | dev_err(chip->dev, | |
371 | "Failed to update mask reg: %d\n", ret); | |
372 | return ret; | |
373 | } | |
374 | ||
375 | } else { | |
376 | dev_warn(chip->dev, "No IRQ configured\n"); | |
377 | } | |
378 | ||
379 | config.dev = chip->dev; | |
380 | config.regmap = chip->regmap; | |
381 | ||
382 | for (i = 0; i < PV88090_MAX_REGULATORS; i++) { | |
383 | if (init_data) | |
384 | config.init_data = &init_data[i]; | |
385 | ||
386 | if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) { | |
387 | ret = regmap_read(chip->regmap, | |
388 | pv88090_regulator_info[i].conf2, &conf2); | |
389 | if (ret < 0) | |
390 | return ret; | |
391 | ||
d761c906 DC |
392 | conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) & |
393 | PV88090_BUCK_VDAC_RANGE_MASK; | |
c90456e3 JB |
394 | |
395 | ret = regmap_read(chip->regmap, | |
396 | PV88090_REG_BUCK_FOLD_RANGE, &range); | |
397 | if (ret < 0) | |
398 | return ret; | |
399 | ||
d761c906 | 400 | range = (range >> |
8986a119 EJ |
401 | (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) & |
402 | PV88090_BUCK_VRANGE_GAIN_MASK; | |
c90456e3 | 403 | index = ((range << 1) | conf2); |
8986a119 EJ |
404 | if (index > PV88090_ID_BUCK3) { |
405 | dev_err(chip->dev, | |
406 | "Invalid index(%d)\n", index); | |
407 | return -EINVAL; | |
408 | } | |
c90456e3 JB |
409 | |
410 | pv88090_regulator_info[i].desc.min_uV | |
411 | = pv88090_buck_vol[index].min_uV; | |
412 | pv88090_regulator_info[i].desc.uV_step | |
413 | = pv88090_buck_vol[index].uV_step; | |
414 | pv88090_regulator_info[i].desc.n_voltages | |
415 | = ((pv88090_buck_vol[index].max_uV) | |
416 | - (pv88090_buck_vol[index].min_uV)) | |
417 | /(pv88090_buck_vol[index].uV_step) + 1; | |
418 | } | |
419 | ||
420 | config.driver_data = (void *)&pv88090_regulator_info[i]; | |
421 | chip->rdev[i] = devm_regulator_register(chip->dev, | |
422 | &pv88090_regulator_info[i].desc, &config); | |
423 | if (IS_ERR(chip->rdev[i])) { | |
424 | dev_err(chip->dev, | |
425 | "Failed to register PV88090 regulator\n"); | |
426 | return PTR_ERR(chip->rdev[i]); | |
427 | } | |
428 | } | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
433 | static const struct i2c_device_id pv88090_i2c_id[] = { | |
434 | {"pv88090", 0}, | |
435 | {}, | |
436 | }; | |
437 | MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id); | |
438 | ||
439 | #ifdef CONFIG_OF | |
440 | static const struct of_device_id pv88090_dt_ids[] = { | |
441 | { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] }, | |
442 | {}, | |
443 | }; | |
444 | MODULE_DEVICE_TABLE(of, pv88090_dt_ids); | |
445 | #endif | |
446 | ||
447 | static struct i2c_driver pv88090_regulator_driver = { | |
448 | .driver = { | |
449 | .name = "pv88090", | |
450 | .of_match_table = of_match_ptr(pv88090_dt_ids), | |
451 | }, | |
452 | .probe = pv88090_i2c_probe, | |
453 | .id_table = pv88090_i2c_id, | |
454 | }; | |
455 | ||
456 | module_i2c_driver(pv88090_regulator_driver); | |
457 | ||
458 | MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); | |
459 | MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090"); | |
460 | MODULE_LICENSE("GPL"); |