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Linux 5.1.15
[linux/fpc-iii.git] / drivers / regulator / pv88090-regulator.c
blob90f4f907fb3fb6f0148577be2dd0136da4a9ea53
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>
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>
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 unsigned int conf;
46 unsigned int conf2;
47 };
48
49 struct pv88090 {
50 struct device *dev;
51 struct regmap *regmap;
52 struct regulator_dev *rdev[PV88090_MAX_REGULATORS];
53 };
54
55 struct pv88090_buck_voltage {
56 int min_uV;
57 int max_uV;
58 int uV_step;
59 };
60
61 static const struct regmap_config pv88090_regmap_config = {
62 .reg_bits = 8,
63 .val_bits = 8,
64 };
65
66 /* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
67 * Entry indexes corresponds to register values.
68 */
69
70 static const unsigned int pv88090_buck1_limits[] = {
71 220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000,
72 1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,
73 3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,
74 5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000
75 };
76
77 static const unsigned int pv88090_buck23_limits[] = {
78 1496000, 2393000, 3291000, 4189000
79 };
80
81 static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {
82 {
83 .min_uV = 600000,
84 .max_uV = 1393750,
85 .uV_step = 6250,
86 },
87
88 {
89 .min_uV = 1400000,
90 .max_uV = 2193750,
91 .uV_step = 6250,
92 },
93 {
94 .min_uV = 1250000,
95 .max_uV = 2837500,
96 .uV_step = 12500,
97 },
98 };
99
100 static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)
101 {
102 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
103 unsigned int data;
104 int ret, mode = 0;
105
106 ret = regmap_read(rdev->regmap, info->conf, &data);
107 if (ret < 0)
108 return ret;
109
110 switch (data & PV88090_BUCK1_MODE_MASK) {
111 case PV88090_BUCK_MODE_SYNC:
112 mode = REGULATOR_MODE_FAST;
113 break;
114 case PV88090_BUCK_MODE_AUTO:
115 mode = REGULATOR_MODE_NORMAL;
116 break;
117 case PV88090_BUCK_MODE_SLEEP:
118 mode = REGULATOR_MODE_STANDBY;
119 break;
120 }
121
122 return mode;
123 }
124
125 static int pv88090_buck_set_mode(struct regulator_dev *rdev,
126 unsigned int mode)
127 {
128 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
129 int val = 0;
130
131 switch (mode) {
132 case REGULATOR_MODE_FAST:
133 val = PV88090_BUCK_MODE_SYNC;
134 break;
135 case REGULATOR_MODE_NORMAL:
136 val = PV88090_BUCK_MODE_AUTO;
137 break;
138 case REGULATOR_MODE_STANDBY:
139 val = PV88090_BUCK_MODE_SLEEP;
140 break;
141 default:
142 return -EINVAL;
143 }
144
145 return regmap_update_bits(rdev->regmap, info->conf,
146 PV88090_BUCK1_MODE_MASK, val);
147 }
148
149 static const struct regulator_ops pv88090_buck_ops = {
150 .get_mode = pv88090_buck_get_mode,
151 .set_mode = pv88090_buck_set_mode,
152 .enable = regulator_enable_regmap,
153 .disable = regulator_disable_regmap,
154 .is_enabled = regulator_is_enabled_regmap,
155 .set_voltage_sel = regulator_set_voltage_sel_regmap,
156 .get_voltage_sel = regulator_get_voltage_sel_regmap,
157 .list_voltage = regulator_list_voltage_linear,
158 .set_current_limit = regulator_set_current_limit_regmap,
159 .get_current_limit = regulator_get_current_limit_regmap,
160 };
161
162 static const struct regulator_ops pv88090_ldo_ops = {
163 .enable = regulator_enable_regmap,
164 .disable = regulator_disable_regmap,
165 .is_enabled = regulator_is_enabled_regmap,
166 .set_voltage_sel = regulator_set_voltage_sel_regmap,
167 .get_voltage_sel = regulator_get_voltage_sel_regmap,
168 .list_voltage = regulator_list_voltage_linear,
169 };
170
171 #define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \
172 {\
173 .desc = {\
174 .id = chip##_ID_##regl_name,\
175 .name = __stringify(chip##_##regl_name),\
176 .of_match = of_match_ptr(#regl_name),\
177 .regulators_node = of_match_ptr("regulators"),\
178 .type = REGULATOR_VOLTAGE,\
179 .owner = THIS_MODULE,\
180 .ops = &pv88090_buck_ops,\
181 .min_uV = min, \
182 .uV_step = step, \
183 .n_voltages = ((max) - (min))/(step) + 1, \
184 .enable_reg = PV88090_REG_##regl_name##_CONF0, \
185 .enable_mask = PV88090_##regl_name##_EN, \
186 .vsel_reg = PV88090_REG_##regl_name##_CONF0, \
187 .vsel_mask = PV88090_V##regl_name##_MASK, \
188 .curr_table = limits_array, \
189 .n_current_limits = ARRAY_SIZE(limits_array), \
190 .csel_reg = PV88090_REG_##regl_name##_CONF1, \
191 .csel_mask = PV88090_##regl_name##_ILIM_MASK, \
192 },\
193 .conf = PV88090_REG_##regl_name##_CONF1, \
194 .conf2 = PV88090_REG_##regl_name##_CONF2, \
195 }
196
197 #define PV88090_LDO(chip, regl_name, min, step, max) \
198 {\
199 .desc = {\
200 .id = chip##_ID_##regl_name,\
201 .name = __stringify(chip##_##regl_name),\
202 .of_match = of_match_ptr(#regl_name),\
203 .regulators_node = of_match_ptr("regulators"),\
204 .type = REGULATOR_VOLTAGE,\
205 .owner = THIS_MODULE,\
206 .ops = &pv88090_ldo_ops,\
207 .min_uV = min, \
208 .uV_step = step, \
209 .n_voltages = ((max) - (min))/(step) + 1, \
210 .enable_reg = PV88090_REG_##regl_name##_CONT, \
211 .enable_mask = PV88090_##regl_name##_EN, \
212 .vsel_reg = PV88090_REG_##regl_name##_CONT, \
213 .vsel_mask = PV88090_V##regl_name##_MASK, \
214 },\
215 }
216
217 static struct pv88090_regulator pv88090_regulator_info[] = {
218 PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,
219 pv88090_buck1_limits),
220 PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,
221 pv88090_buck23_limits),
222 PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,
223 pv88090_buck23_limits),
224 PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),
225 PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000),
226 };
227
228 static irqreturn_t pv88090_irq_handler(int irq, void *data)
229 {
230 struct pv88090 *chip = data;
231 int i, reg_val, err, ret = IRQ_NONE;
232
233 err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, &reg_val);
234 if (err < 0)
235 goto error_i2c;
236
237 if (reg_val & PV88090_E_VDD_FLT) {
238 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
239 if (chip->rdev[i] != NULL) {
240 regulator_lock(chip->rdev[i]);
241 regulator_notifier_call_chain(chip->rdev[i],
242 REGULATOR_EVENT_UNDER_VOLTAGE,
243 NULL);
244 regulator_unlock(chip->rdev[i]);
245 }
246 }
247
248 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
249 PV88090_E_VDD_FLT);
250 if (err < 0)
251 goto error_i2c;
252
253 ret = IRQ_HANDLED;
254 }
255
256 if (reg_val & PV88090_E_OVER_TEMP) {
257 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
258 if (chip->rdev[i] != NULL) {
259 regulator_lock(chip->rdev[i]);
260 regulator_notifier_call_chain(chip->rdev[i],
261 REGULATOR_EVENT_OVER_TEMP,
262 NULL);
263 regulator_unlock(chip->rdev[i]);
264 }
265 }
266
267 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
268 PV88090_E_OVER_TEMP);
269 if (err < 0)
270 goto error_i2c;
271
272 ret = IRQ_HANDLED;
273 }
274
275 return ret;
276
277 error_i2c:
278 dev_err(chip->dev, "I2C error : %d\n", err);
279 return IRQ_NONE;
280 }
281
282 /*
283 * I2C driver interface functions
284 */
285 static int pv88090_i2c_probe(struct i2c_client *i2c,
286 const struct i2c_device_id *id)
287 {
288 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
289 struct pv88090 *chip;
290 struct regulator_config config = { };
291 int error, i, ret = 0;
292 unsigned int conf2, range, index;
293
294 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
295 if (!chip)
296 return -ENOMEM;
297
298 chip->dev = &i2c->dev;
299 chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config);
300 if (IS_ERR(chip->regmap)) {
301 error = PTR_ERR(chip->regmap);
302 dev_err(chip->dev, "Failed to allocate register map: %d\n",
303 error);
304 return error;
305 }
306
307 i2c_set_clientdata(i2c, chip);
308
309 if (i2c->irq != 0) {
310 ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF);
311 if (ret < 0) {
312 dev_err(chip->dev,
313 "Failed to mask A reg: %d\n", ret);
314 return ret;
315 }
316
317 ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF);
318 if (ret < 0) {
319 dev_err(chip->dev,
320 "Failed to mask B reg: %d\n", ret);
321 return ret;
322 }
323
324 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
325 pv88090_irq_handler,
326 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
327 "pv88090", chip);
328 if (ret != 0) {
329 dev_err(chip->dev, "Failed to request IRQ: %d\n",
330 i2c->irq);
331 return ret;
332 }
333
334 ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
335 PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0);
336 if (ret < 0) {
337 dev_err(chip->dev,
338 "Failed to update mask reg: %d\n", ret);
339 return ret;
340 }
341
342 } else {
343 dev_warn(chip->dev, "No IRQ configured\n");
344 }
345
346 config.dev = chip->dev;
347 config.regmap = chip->regmap;
348
349 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
350 if (init_data)
351 config.init_data = &init_data[i];
352
353 if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) {
354 ret = regmap_read(chip->regmap,
355 pv88090_regulator_info[i].conf2, &conf2);
356 if (ret < 0)
357 return ret;
358
359 conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &
360 PV88090_BUCK_VDAC_RANGE_MASK;
361
362 ret = regmap_read(chip->regmap,
363 PV88090_REG_BUCK_FOLD_RANGE, &range);
364 if (ret < 0)
365 return ret;
366
367 range = (range >>
368 (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
369 PV88090_BUCK_VRANGE_GAIN_MASK;
370 index = ((range << 1) | conf2);
371 if (index > PV88090_ID_BUCK3) {
372 dev_err(chip->dev,
373 "Invalid index(%d)\n", index);
374 return -EINVAL;
375 }
376
377 pv88090_regulator_info[i].desc.min_uV
378 = pv88090_buck_vol[index].min_uV;
379 pv88090_regulator_info[i].desc.uV_step
380 = pv88090_buck_vol[index].uV_step;
381 pv88090_regulator_info[i].desc.n_voltages
382 = ((pv88090_buck_vol[index].max_uV)
383 - (pv88090_buck_vol[index].min_uV))
384 /(pv88090_buck_vol[index].uV_step) + 1;
385 }
386
387 config.driver_data = (void *)&pv88090_regulator_info[i];
388 chip->rdev[i] = devm_regulator_register(chip->dev,
389 &pv88090_regulator_info[i].desc, &config);
390 if (IS_ERR(chip->rdev[i])) {
391 dev_err(chip->dev,
392 "Failed to register PV88090 regulator\n");
393 return PTR_ERR(chip->rdev[i]);
394 }
395 }
396
397 return 0;
398 }
399
400 static const struct i2c_device_id pv88090_i2c_id[] = {
401 {"pv88090", 0},
402 {},
403 };
404 MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);
405
406 #ifdef CONFIG_OF
407 static const struct of_device_id pv88090_dt_ids[] = {
408 { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
409 {},
410 };
411 MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
412 #endif
413
414 static struct i2c_driver pv88090_regulator_driver = {
415 .driver = {
416 .name = "pv88090",
417 .of_match_table = of_match_ptr(pv88090_dt_ids),
418 },
419 .probe = pv88090_i2c_probe,
420 .id_table = pv88090_i2c_id,
421 };
422
423 module_i2c_driver(pv88090_regulator_driver);
424
425 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
426 MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
427 MODULE_LICENSE("GPL");
Linux with added FPC-III support