Commit | Line | Data |
---|---|---|
f307a7e9 JB |
1 | /* |
2 | * pv88060-regulator.c - Regulator device driver for PV88060 | |
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> | |
17 | #include <linux/gpio.h> | |
18 | #include <linux/i2c.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/regulator/driver.h> | |
23 | #include <linux/regulator/machine.h> | |
24 | #include <linux/regmap.h> | |
25 | #include <linux/irq.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/regulator/of_regulator.h> | |
28 | #include <linux/proc_fs.h> | |
29 | #include <linux/uaccess.h> | |
30 | #include "pv88060-regulator.h" | |
31 | ||
32 | #define PV88060_MAX_REGULATORS 14 | |
33 | ||
34 | /* PV88060 REGULATOR IDs */ | |
35 | enum { | |
36 | /* BUCKs */ | |
37 | PV88060_ID_BUCK1, | |
38 | ||
39 | /* LDOs */ | |
40 | PV88060_ID_LDO1, | |
41 | PV88060_ID_LDO2, | |
42 | PV88060_ID_LDO3, | |
43 | PV88060_ID_LDO4, | |
44 | PV88060_ID_LDO5, | |
45 | PV88060_ID_LDO6, | |
46 | PV88060_ID_LDO7, | |
47 | ||
48 | /* SWTs */ | |
49 | PV88060_ID_SW1, | |
50 | PV88060_ID_SW2, | |
51 | PV88060_ID_SW3, | |
52 | PV88060_ID_SW4, | |
53 | PV88060_ID_SW5, | |
54 | PV88060_ID_SW6, | |
55 | }; | |
56 | ||
57 | struct pv88060_regulator { | |
58 | struct regulator_desc desc; | |
59 | /* Current limiting */ | |
60 | unsigned n_current_limits; | |
61 | const int *current_limits; | |
62 | unsigned int limit_mask; | |
63 | unsigned int conf; /* buck configuration register */ | |
64 | }; | |
65 | ||
66 | struct pv88060 { | |
67 | struct device *dev; | |
68 | struct regmap *regmap; | |
69 | struct regulator_dev *rdev[PV88060_MAX_REGULATORS]; | |
70 | }; | |
71 | ||
72 | static const struct regmap_config pv88060_regmap_config = { | |
73 | .reg_bits = 8, | |
74 | .val_bits = 8, | |
75 | }; | |
76 | ||
77 | /* Current limits array (in uA) for BUCK1 | |
78 | * Entry indexes corresponds to register values. | |
79 | */ | |
80 | ||
81 | static const int pv88060_buck1_limits[] = { | |
82 | 1496000, 2393000, 3291000, 4189000 | |
83 | }; | |
84 | ||
85 | static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev) | |
86 | { | |
87 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); | |
88 | unsigned int data; | |
89 | int ret, mode = 0; | |
90 | ||
91 | ret = regmap_read(rdev->regmap, info->conf, &data); | |
92 | if (ret < 0) | |
93 | return ret; | |
94 | ||
95 | switch (data & PV88060_BUCK_MODE_MASK) { | |
96 | case PV88060_BUCK_MODE_SYNC: | |
97 | mode = REGULATOR_MODE_FAST; | |
98 | break; | |
99 | case PV88060_BUCK_MODE_AUTO: | |
100 | mode = REGULATOR_MODE_NORMAL; | |
101 | break; | |
102 | case PV88060_BUCK_MODE_SLEEP: | |
103 | mode = REGULATOR_MODE_STANDBY; | |
104 | break; | |
105 | } | |
106 | ||
107 | return mode; | |
108 | } | |
109 | ||
110 | static int pv88060_buck_set_mode(struct regulator_dev *rdev, | |
111 | unsigned int mode) | |
112 | { | |
113 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); | |
114 | int val = 0; | |
115 | ||
116 | switch (mode) { | |
117 | case REGULATOR_MODE_FAST: | |
118 | val = PV88060_BUCK_MODE_SYNC; | |
119 | break; | |
120 | case REGULATOR_MODE_NORMAL: | |
121 | val = PV88060_BUCK_MODE_AUTO; | |
122 | break; | |
123 | case REGULATOR_MODE_STANDBY: | |
124 | val = PV88060_BUCK_MODE_SLEEP; | |
125 | break; | |
126 | default: | |
127 | return -EINVAL; | |
128 | } | |
129 | ||
130 | return regmap_update_bits(rdev->regmap, info->conf, | |
131 | PV88060_BUCK_MODE_MASK, val); | |
132 | } | |
133 | ||
134 | static int pv88060_set_current_limit(struct regulator_dev *rdev, int min, | |
135 | int max) | |
136 | { | |
137 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); | |
138 | int i; | |
139 | ||
140 | /* search for closest to maximum */ | |
141 | for (i = info->n_current_limits; i >= 0; i--) { | |
142 | if (min <= info->current_limits[i] | |
143 | && max >= info->current_limits[i]) { | |
144 | return regmap_update_bits(rdev->regmap, | |
145 | info->conf, | |
146 | info->limit_mask, | |
147 | i << PV88060_BUCK_ILIM_SHIFT); | |
148 | } | |
149 | } | |
150 | ||
151 | return -EINVAL; | |
152 | } | |
153 | ||
154 | static int pv88060_get_current_limit(struct regulator_dev *rdev) | |
155 | { | |
156 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); | |
157 | unsigned int data; | |
158 | int ret; | |
159 | ||
160 | ret = regmap_read(rdev->regmap, info->conf, &data); | |
161 | if (ret < 0) | |
162 | return ret; | |
163 | ||
164 | data = (data & info->limit_mask) >> PV88060_BUCK_ILIM_SHIFT; | |
165 | return info->current_limits[data]; | |
166 | } | |
167 | ||
168 | static struct regulator_ops pv88060_buck_ops = { | |
169 | .get_mode = pv88060_buck_get_mode, | |
170 | .set_mode = pv88060_buck_set_mode, | |
171 | .enable = regulator_enable_regmap, | |
172 | .disable = regulator_disable_regmap, | |
173 | .is_enabled = regulator_is_enabled_regmap, | |
174 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
175 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
176 | .list_voltage = regulator_list_voltage_linear, | |
177 | .set_current_limit = pv88060_set_current_limit, | |
178 | .get_current_limit = pv88060_get_current_limit, | |
179 | }; | |
180 | ||
181 | static struct regulator_ops pv88060_ldo_ops = { | |
182 | .enable = regulator_enable_regmap, | |
183 | .disable = regulator_disable_regmap, | |
184 | .is_enabled = regulator_is_enabled_regmap, | |
185 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
186 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
187 | .list_voltage = regulator_list_voltage_linear, | |
188 | }; | |
189 | ||
190 | #define PV88060_BUCK(chip, regl_name, min, step, max, limits_array) \ | |
191 | {\ | |
192 | .desc = {\ | |
193 | .id = chip##_ID_##regl_name,\ | |
194 | .name = __stringify(chip##_##regl_name),\ | |
195 | .of_match = of_match_ptr(#regl_name),\ | |
196 | .regulators_node = of_match_ptr("regulators"),\ | |
197 | .type = REGULATOR_VOLTAGE,\ | |
198 | .owner = THIS_MODULE,\ | |
199 | .ops = &pv88060_buck_ops,\ | |
200 | .min_uV = min,\ | |
201 | .uV_step = step,\ | |
202 | .n_voltages = ((max) - (min))/(step) + 1,\ | |
203 | .enable_reg = PV88060_REG_##regl_name##_CONF0,\ | |
204 | .enable_mask = PV88060_BUCK_EN, \ | |
205 | .vsel_reg = PV88060_REG_##regl_name##_CONF0,\ | |
206 | .vsel_mask = PV88060_VBUCK_MASK,\ | |
207 | },\ | |
208 | .current_limits = limits_array,\ | |
209 | .n_current_limits = ARRAY_SIZE(limits_array),\ | |
210 | .limit_mask = PV88060_BUCK_ILIM_MASK, \ | |
211 | .conf = PV88060_REG_##regl_name##_CONF1,\ | |
212 | } | |
213 | ||
214 | #define PV88060_LDO(chip, regl_name, min, step, max) \ | |
215 | {\ | |
216 | .desc = {\ | |
217 | .id = chip##_ID_##regl_name,\ | |
218 | .name = __stringify(chip##_##regl_name),\ | |
219 | .of_match = of_match_ptr(#regl_name),\ | |
220 | .regulators_node = of_match_ptr("regulators"),\ | |
221 | .type = REGULATOR_VOLTAGE,\ | |
222 | .owner = THIS_MODULE,\ | |
223 | .ops = &pv88060_ldo_ops,\ | |
224 | .min_uV = min, \ | |
225 | .uV_step = step, \ | |
226 | .n_voltages = (step) ? ((max - min) / step + 1) : 1, \ | |
227 | .enable_reg = PV88060_REG_##regl_name##_CONF, \ | |
228 | .enable_mask = PV88060_LDO_EN, \ | |
229 | .vsel_reg = PV88060_REG_##regl_name##_CONF, \ | |
230 | .vsel_mask = PV88060_VLDO_MASK, \ | |
231 | },\ | |
232 | } | |
233 | ||
234 | #define PV88060_SW(chip, regl_name, 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 = &pv88060_ldo_ops,\ | |
244 | .min_uV = max,\ | |
245 | .uV_step = 0,\ | |
246 | .n_voltages = 1,\ | |
247 | .enable_reg = PV88060_REG_##regl_name##_CONF,\ | |
248 | .enable_mask = PV88060_SW_EN,\ | |
249 | },\ | |
250 | } | |
251 | ||
252 | static const struct pv88060_regulator pv88060_regulator_info[] = { | |
253 | PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500, | |
254 | pv88060_buck1_limits), | |
255 | PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000), | |
256 | PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000), | |
257 | PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000), | |
258 | PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000), | |
259 | PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000), | |
260 | PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000), | |
261 | PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000), | |
262 | PV88060_SW(PV88060, SW1, 5000000), | |
263 | PV88060_SW(PV88060, SW2, 5000000), | |
264 | PV88060_SW(PV88060, SW3, 5000000), | |
265 | PV88060_SW(PV88060, SW4, 5000000), | |
266 | PV88060_SW(PV88060, SW5, 5000000), | |
267 | PV88060_SW(PV88060, SW6, 5000000), | |
268 | }; | |
269 | ||
270 | static irqreturn_t pv88060_irq_handler(int irq, void *data) | |
271 | { | |
272 | struct pv88060 *chip = data; | |
273 | int i, reg_val, err, ret = IRQ_NONE; | |
274 | ||
275 | err = regmap_read(chip->regmap, PV88060_REG_EVENT_A, ®_val); | |
276 | if (err < 0) | |
277 | goto error_i2c; | |
278 | ||
279 | if (reg_val & PV88060_E_VDD_FLT) { | |
280 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { | |
281 | if (chip->rdev[i] != NULL) { | |
282 | regulator_notifier_call_chain(chip->rdev[i], | |
283 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
284 | NULL); | |
285 | } | |
286 | } | |
287 | ||
288 | err = regmap_update_bits(chip->regmap, PV88060_REG_EVENT_A, | |
289 | PV88060_E_VDD_FLT, PV88060_E_VDD_FLT); | |
290 | if (err < 0) | |
291 | goto error_i2c; | |
292 | ||
293 | ret = IRQ_HANDLED; | |
294 | } | |
295 | ||
296 | if (reg_val & PV88060_E_OVER_TEMP) { | |
297 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { | |
298 | if (chip->rdev[i] != NULL) { | |
299 | regulator_notifier_call_chain(chip->rdev[i], | |
300 | REGULATOR_EVENT_OVER_TEMP, | |
301 | NULL); | |
302 | } | |
303 | } | |
304 | ||
305 | err = regmap_update_bits(chip->regmap, PV88060_REG_EVENT_A, | |
306 | PV88060_E_OVER_TEMP, PV88060_E_OVER_TEMP); | |
307 | if (err < 0) | |
308 | goto error_i2c; | |
309 | ||
310 | ret = IRQ_HANDLED; | |
311 | } | |
312 | ||
313 | return ret; | |
314 | ||
315 | error_i2c: | |
316 | dev_err(chip->dev, "I2C error : %d\n", err); | |
317 | return IRQ_NONE; | |
318 | } | |
319 | ||
320 | /* | |
321 | * I2C driver interface functions | |
322 | */ | |
323 | static int pv88060_i2c_probe(struct i2c_client *i2c, | |
324 | const struct i2c_device_id *id) | |
325 | { | |
326 | struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); | |
327 | struct pv88060 *chip; | |
328 | struct regulator_config config = { }; | |
329 | int error, i, ret = 0; | |
330 | ||
331 | chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88060), GFP_KERNEL); | |
332 | if (!chip) | |
333 | return -ENOMEM; | |
334 | ||
335 | chip->dev = &i2c->dev; | |
336 | chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_regmap_config); | |
337 | if (IS_ERR(chip->regmap)) { | |
338 | error = PTR_ERR(chip->regmap); | |
339 | dev_err(chip->dev, "Failed to allocate register map: %d\n", | |
340 | error); | |
341 | return error; | |
342 | } | |
343 | ||
344 | i2c_set_clientdata(i2c, chip); | |
345 | ||
346 | if (i2c->irq != 0) { | |
347 | ret = regmap_write(chip->regmap, PV88060_REG_MASK_A, 0xFF); | |
348 | if (ret < 0) { | |
349 | dev_err(chip->dev, | |
350 | "Failed to mask A reg: %d\n", ret); | |
351 | return ret; | |
352 | } | |
353 | ||
3c0a2f64 | 354 | ret = regmap_write(chip->regmap, PV88060_REG_MASK_B, 0xFF); |
f307a7e9 JB |
355 | if (ret < 0) { |
356 | dev_err(chip->dev, | |
357 | "Failed to mask B reg: %d\n", ret); | |
358 | return ret; | |
359 | } | |
360 | ||
3c0a2f64 | 361 | ret = regmap_write(chip->regmap, PV88060_REG_MASK_C, 0xFF); |
f307a7e9 JB |
362 | if (ret < 0) { |
363 | dev_err(chip->dev, | |
364 | "Failed to mask C reg: %d\n", ret); | |
365 | return ret; | |
366 | } | |
367 | ||
88467943 | 368 | ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
f307a7e9 JB |
369 | pv88060_irq_handler, |
370 | IRQF_TRIGGER_LOW|IRQF_ONESHOT, | |
371 | "pv88060", chip); | |
372 | if (ret != 0) { | |
373 | dev_err(chip->dev, "Failed to request IRQ: %d\n", | |
374 | i2c->irq); | |
375 | return ret; | |
376 | } | |
377 | ||
378 | ret = regmap_update_bits(chip->regmap, PV88060_REG_MASK_A, | |
379 | PV88060_M_VDD_FLT | PV88060_M_OVER_TEMP, 0); | |
380 | if (ret < 0) { | |
381 | dev_err(chip->dev, | |
382 | "Failed to update mask reg: %d\n", ret); | |
383 | return ret; | |
384 | } | |
385 | ||
386 | } else { | |
387 | dev_warn(chip->dev, "No IRQ configured\n"); | |
388 | } | |
389 | ||
390 | config.dev = chip->dev; | |
391 | config.regmap = chip->regmap; | |
392 | ||
393 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { | |
394 | if (init_data) | |
395 | config.init_data = &init_data[i]; | |
396 | ||
397 | config.driver_data = (void *)&pv88060_regulator_info[i]; | |
398 | chip->rdev[i] = devm_regulator_register(chip->dev, | |
399 | &pv88060_regulator_info[i].desc, &config); | |
400 | if (IS_ERR(chip->rdev[i])) { | |
401 | dev_err(chip->dev, | |
402 | "Failed to register PV88060 regulator\n"); | |
403 | return PTR_ERR(chip->rdev[i]); | |
404 | } | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | static const struct i2c_device_id pv88060_i2c_id[] = { | |
411 | {"pv88060", 0}, | |
412 | {}, | |
413 | }; | |
414 | MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id); | |
415 | ||
416 | #ifdef CONFIG_OF | |
417 | static const struct of_device_id pv88060_dt_ids[] = { | |
418 | { .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] }, | |
419 | {}, | |
420 | }; | |
421 | MODULE_DEVICE_TABLE(of, pv88060_dt_ids); | |
422 | #endif | |
423 | ||
424 | static struct i2c_driver pv88060_regulator_driver = { | |
425 | .driver = { | |
426 | .name = "pv88060", | |
427 | .of_match_table = of_match_ptr(pv88060_dt_ids), | |
428 | }, | |
429 | .probe = pv88060_i2c_probe, | |
430 | .id_table = pv88060_i2c_id, | |
431 | }; | |
432 | ||
433 | module_i2c_driver(pv88060_regulator_driver); | |
434 | ||
435 | MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); | |
436 | MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060"); | |
437 | MODULE_LICENSE("GPL"); |