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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/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 "pv88090-regulator.h"
31
32#define PV88090_MAX_REGULATORS 5
33
34/* PV88090 REGULATOR IDs */
35enum {
36 /* BUCKs */
37 PV88090_ID_BUCK1,
38 PV88090_ID_BUCK2,
39 PV88090_ID_BUCK3,
40
41 /* LDOs */
42 PV88090_ID_LDO1,
43 PV88090_ID_LDO2,
44};
45
46struct pv88090_regulator {
47 struct regulator_desc desc;
48 /* Current limiting */
49 unsigned n_current_limits;
50 const int *current_limits;
51 unsigned int limit_mask;
52 unsigned int conf;
53 unsigned int conf2;
54};
55
56struct pv88090 {
57 struct device *dev;
58 struct regmap *regmap;
59 struct regulator_dev *rdev[PV88090_MAX_REGULATORS];
60};
61
62struct pv88090_buck_voltage {
63 int min_uV;
64 int max_uV;
65 int uV_step;
66};
67
68static const struct regmap_config pv88090_regmap_config = {
69 .reg_bits = 8,
70 .val_bits = 8,
71};
72
73/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
74 * Entry indexes corresponds to register values.
75 */
76
77static const int pv88090_buck1_limits[] = {
78 220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000,
79 1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,
80 3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,
81 5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000
82};
83
84static const int pv88090_buck23_limits[] = {
85 1496000, 2393000, 3291000, 4189000
86};
87
88static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {
89 {
90 .min_uV = 600000,
91 .max_uV = 1393750,
92 .uV_step = 6250,
93 },
94
95 {
96 .min_uV = 1400000,
97 .max_uV = 2193750,
98 .uV_step = 6250,
99 },
100 {
101 .min_uV = 1250000,
102 .max_uV = 2837500,
103 .uV_step = 12500,
104 },
105};
106
107static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)
108{
109 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
110 unsigned int data;
111 int ret, mode = 0;
112
113 ret = regmap_read(rdev->regmap, info->conf, &data);
114 if (ret < 0)
115 return ret;
116
117 switch (data & PV88090_BUCK1_MODE_MASK) {
118 case PV88090_BUCK_MODE_SYNC:
119 mode = REGULATOR_MODE_FAST;
120 break;
121 case PV88090_BUCK_MODE_AUTO:
122 mode = REGULATOR_MODE_NORMAL;
123 break;
124 case PV88090_BUCK_MODE_SLEEP:
125 mode = REGULATOR_MODE_STANDBY;
126 break;
127 }
128
129 return mode;
130}
131
132static int pv88090_buck_set_mode(struct regulator_dev *rdev,
133 unsigned int mode)
134{
135 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
136 int val = 0;
137
138 switch (mode) {
139 case REGULATOR_MODE_FAST:
140 val = PV88090_BUCK_MODE_SYNC;
141 break;
142 case REGULATOR_MODE_NORMAL:
143 val = PV88090_BUCK_MODE_AUTO;
144 break;
145 case REGULATOR_MODE_STANDBY:
146 val = PV88090_BUCK_MODE_SLEEP;
147 break;
148 default:
149 return -EINVAL;
150 }
151
152 return regmap_update_bits(rdev->regmap, info->conf,
153 PV88090_BUCK1_MODE_MASK, val);
154}
155
156static int pv88090_set_current_limit(struct regulator_dev *rdev, int min,
157 int max)
158{
159 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
160 int i;
161
162 /* search for closest to maximum */
163 for (i = info->n_current_limits; i >= 0; i--) {
164 if (min <= info->current_limits[i]
165 && max >= info->current_limits[i]) {
166 return regmap_update_bits(rdev->regmap,
167 info->conf,
168 info->limit_mask,
169 i << PV88090_BUCK1_ILIM_SHIFT);
170 }
171 }
172
173 return -EINVAL;
174}
175
176static int pv88090_get_current_limit(struct regulator_dev *rdev)
177{
178 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
179 unsigned int data;
180 int ret;
181
182 ret = regmap_read(rdev->regmap, info->conf, &data);
183 if (ret < 0)
184 return ret;
185
186 data = (data & info->limit_mask) >> PV88090_BUCK1_ILIM_SHIFT;
187 return info->current_limits[data];
188}
189
190static struct regulator_ops pv88090_buck_ops = {
191 .get_mode = pv88090_buck_get_mode,
192 .set_mode = pv88090_buck_set_mode,
193 .enable = regulator_enable_regmap,
194 .disable = regulator_disable_regmap,
195 .is_enabled = regulator_is_enabled_regmap,
196 .set_voltage_sel = regulator_set_voltage_sel_regmap,
197 .get_voltage_sel = regulator_get_voltage_sel_regmap,
198 .list_voltage = regulator_list_voltage_linear,
199 .set_current_limit = pv88090_set_current_limit,
200 .get_current_limit = pv88090_get_current_limit,
201};
202
203static struct regulator_ops pv88090_ldo_ops = {
204 .enable = regulator_enable_regmap,
205 .disable = regulator_disable_regmap,
206 .is_enabled = regulator_is_enabled_regmap,
207 .set_voltage_sel = regulator_set_voltage_sel_regmap,
208 .get_voltage_sel = regulator_get_voltage_sel_regmap,
209 .list_voltage = regulator_list_voltage_linear,
210};
211
212#define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \
213{\
214 .desc = {\
215 .id = chip##_ID_##regl_name,\
216 .name = __stringify(chip##_##regl_name),\
217 .of_match = of_match_ptr(#regl_name),\
218 .regulators_node = of_match_ptr("regulators"),\
219 .type = REGULATOR_VOLTAGE,\
220 .owner = THIS_MODULE,\
221 .ops = &pv88090_buck_ops,\
222 .min_uV = min, \
223 .uV_step = step, \
224 .n_voltages = ((max) - (min))/(step) + 1, \
225 .enable_reg = PV88090_REG_##regl_name##_CONF0, \
226 .enable_mask = PV88090_##regl_name##_EN, \
227 .vsel_reg = PV88090_REG_##regl_name##_CONF0, \
228 .vsel_mask = PV88090_V##regl_name##_MASK, \
229 },\
230 .current_limits = limits_array, \
231 .n_current_limits = ARRAY_SIZE(limits_array), \
232 .limit_mask = PV88090_##regl_name##_ILIM_MASK, \
233 .conf = PV88090_REG_##regl_name##_CONF1, \
234 .conf2 = PV88090_REG_##regl_name##_CONF2, \
235}
236
237#define PV88090_LDO(chip, regl_name, min, step, max) \
238{\
239 .desc = {\
240 .id = chip##_ID_##regl_name,\
241 .name = __stringify(chip##_##regl_name),\
242 .of_match = of_match_ptr(#regl_name),\
243 .regulators_node = of_match_ptr("regulators"),\
244 .type = REGULATOR_VOLTAGE,\
245 .owner = THIS_MODULE,\
246 .ops = &pv88090_ldo_ops,\
247 .min_uV = min, \
248 .uV_step = step, \
249 .n_voltages = ((max) - (min))/(step) + 1, \
250 .enable_reg = PV88090_REG_##regl_name##_CONT, \
251 .enable_mask = PV88090_##regl_name##_EN, \
252 .vsel_reg = PV88090_REG_##regl_name##_CONT, \
253 .vsel_mask = PV88090_V##regl_name##_MASK, \
254 },\
255}
256
257static struct pv88090_regulator pv88090_regulator_info[] = {
258 PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,
259 pv88090_buck1_limits),
260 PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,
261 pv88090_buck23_limits),
262 PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,
263 pv88090_buck23_limits),
264 PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),
265 PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000),
266};
267
268static irqreturn_t pv88090_irq_handler(int irq, void *data)
269{
270 struct pv88090 *chip = data;
271 int i, reg_val, err, ret = IRQ_NONE;
272
273 err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, ®_val);
274 if (err < 0)
275 goto error_i2c;
276
277 if (reg_val & PV88090_E_VDD_FLT) {
278 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
279 if (chip->rdev[i] != NULL) {
280 regulator_notifier_call_chain(chip->rdev[i],
281 REGULATOR_EVENT_UNDER_VOLTAGE,
282 NULL);
283 }
284 }
285
286 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
287 PV88090_E_VDD_FLT);
288 if (err < 0)
289 goto error_i2c;
290
291 ret = IRQ_HANDLED;
292 }
293
294 if (reg_val & PV88090_E_OVER_TEMP) {
295 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
296 if (chip->rdev[i] != NULL) {
297 regulator_notifier_call_chain(chip->rdev[i],
298 REGULATOR_EVENT_OVER_TEMP,
299 NULL);
300 }
301 }
302
303 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
304 PV88090_E_OVER_TEMP);
305 if (err < 0)
306 goto error_i2c;
307
308 ret = IRQ_HANDLED;
309 }
310
311 return ret;
312
313error_i2c:
314 dev_err(chip->dev, "I2C error : %d\n", err);
315 return IRQ_NONE;
316}
317
318/*
319 * I2C driver interface functions
320 */
321static int pv88090_i2c_probe(struct i2c_client *i2c,
322 const struct i2c_device_id *id)
323{
324 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
325 struct pv88090 *chip;
326 struct regulator_config config = { };
327 int error, i, ret = 0;
328 unsigned int conf2, range, index;
329
330 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
331 if (!chip)
332 return -ENOMEM;
333
334 chip->dev = &i2c->dev;
335 chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config);
336 if (IS_ERR(chip->regmap)) {
337 error = PTR_ERR(chip->regmap);
338 dev_err(chip->dev, "Failed to allocate register map: %d\n",
339 error);
340 return error;
341 }
342
343 i2c_set_clientdata(i2c, chip);
344
345 if (i2c->irq != 0) {
346 ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF);
347 if (ret < 0) {
348 dev_err(chip->dev,
349 "Failed to mask A reg: %d\n", ret);
350 return ret;
351 }
352
353 ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF);
354 if (ret < 0) {
355 dev_err(chip->dev,
356 "Failed to mask B reg: %d\n", ret);
357 return ret;
358 }
359
360 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
361 pv88090_irq_handler,
362 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
363 "pv88090", chip);
364 if (ret != 0) {
365 dev_err(chip->dev, "Failed to request IRQ: %d\n",
366 i2c->irq);
367 return ret;
368 }
369
370 ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
371 PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0);
372 if (ret < 0) {
373 dev_err(chip->dev,
374 "Failed to update mask reg: %d\n", ret);
375 return ret;
376 }
377
378 } else {
379 dev_warn(chip->dev, "No IRQ configured\n");
380 }
381
382 config.dev = chip->dev;
383 config.regmap = chip->regmap;
384
385 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
386 if (init_data)
387 config.init_data = &init_data[i];
388
389 if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) {
390 ret = regmap_read(chip->regmap,
391 pv88090_regulator_info[i].conf2, &conf2);
392 if (ret < 0)
393 return ret;
394
395 conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &
396 PV88090_BUCK_VDAC_RANGE_MASK;
397
398 ret = regmap_read(chip->regmap,
399 PV88090_REG_BUCK_FOLD_RANGE, &range);
400 if (ret < 0)
401 return ret;
402
403 range = (range >>
404 (PV88080_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
405 PV88080_BUCK_VRANGE_GAIN_MASK;
406 index = ((range << 1) | conf2);
407
408 pv88090_regulator_info[i].desc.min_uV
409 = pv88090_buck_vol[index].min_uV;
410 pv88090_regulator_info[i].desc.uV_step
411 = pv88090_buck_vol[index].uV_step;
412 pv88090_regulator_info[i].desc.n_voltages
413 = ((pv88090_buck_vol[index].max_uV)
414 - (pv88090_buck_vol[index].min_uV))
415 /(pv88090_buck_vol[index].uV_step) + 1;
416 }
417
418 config.driver_data = (void *)&pv88090_regulator_info[i];
419 chip->rdev[i] = devm_regulator_register(chip->dev,
420 &pv88090_regulator_info[i].desc, &config);
421 if (IS_ERR(chip->rdev[i])) {
422 dev_err(chip->dev,
423 "Failed to register PV88090 regulator\n");
424 return PTR_ERR(chip->rdev[i]);
425 }
426 }
427
428 return 0;
429}
430
431static const struct i2c_device_id pv88090_i2c_id[] = {
432 {"pv88090", 0},
433 {},
434};
435MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);
436
437#ifdef CONFIG_OF
438static const struct of_device_id pv88090_dt_ids[] = {
439 { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
440 {},
441};
442MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
443#endif
444
445static struct i2c_driver pv88090_regulator_driver = {
446 .driver = {
447 .name = "pv88090",
448 .of_match_table = of_match_ptr(pv88090_dt_ids),
449 },
450 .probe = pv88090_i2c_probe,
451 .id_table = pv88090_i2c_id,
452};
453
454module_i2c_driver(pv88090_regulator_driver);
455
456MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
457MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
458MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// pv88090-regulator.c - Regulator device driver for PV88090
4// Copyright (C) 2015 Powerventure Semiconductor Ltd.
5
6#include <linux/err.h>
7#include <linux/i2c.h>
8#include <linux/module.h>
9#include <linux/init.h>
10#include <linux/slab.h>
11#include <linux/regulator/driver.h>
12#include <linux/regulator/machine.h>
13#include <linux/regmap.h>
14#include <linux/irq.h>
15#include <linux/interrupt.h>
16#include <linux/regulator/of_regulator.h>
17#include "pv88090-regulator.h"
18
19#define PV88090_MAX_REGULATORS 5
20
21/* PV88090 REGULATOR IDs */
22enum {
23 /* BUCKs */
24 PV88090_ID_BUCK1,
25 PV88090_ID_BUCK2,
26 PV88090_ID_BUCK3,
27
28 /* LDOs */
29 PV88090_ID_LDO1,
30 PV88090_ID_LDO2,
31};
32
33struct pv88090_regulator {
34 struct regulator_desc desc;
35 unsigned int conf;
36 unsigned int conf2;
37};
38
39struct pv88090 {
40 struct device *dev;
41 struct regmap *regmap;
42 struct regulator_dev *rdev[PV88090_MAX_REGULATORS];
43};
44
45struct pv88090_buck_voltage {
46 int min_uV;
47 int max_uV;
48 int uV_step;
49};
50
51static const struct regmap_config pv88090_regmap_config = {
52 .reg_bits = 8,
53 .val_bits = 8,
54};
55
56/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
57 * Entry indexes corresponds to register values.
58 */
59
60static const unsigned int pv88090_buck1_limits[] = {
61 220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000,
62 1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,
63 3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,
64 5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000
65};
66
67static const unsigned int pv88090_buck23_limits[] = {
68 1496000, 2393000, 3291000, 4189000
69};
70
71static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {
72 {
73 .min_uV = 600000,
74 .max_uV = 1393750,
75 .uV_step = 6250,
76 },
77
78 {
79 .min_uV = 1400000,
80 .max_uV = 2193750,
81 .uV_step = 6250,
82 },
83 {
84 .min_uV = 1250000,
85 .max_uV = 2837500,
86 .uV_step = 12500,
87 },
88};
89
90static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)
91{
92 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
93 unsigned int data;
94 int ret, mode = 0;
95
96 ret = regmap_read(rdev->regmap, info->conf, &data);
97 if (ret < 0)
98 return ret;
99
100 switch (data & PV88090_BUCK1_MODE_MASK) {
101 case PV88090_BUCK_MODE_SYNC:
102 mode = REGULATOR_MODE_FAST;
103 break;
104 case PV88090_BUCK_MODE_AUTO:
105 mode = REGULATOR_MODE_NORMAL;
106 break;
107 case PV88090_BUCK_MODE_SLEEP:
108 mode = REGULATOR_MODE_STANDBY;
109 break;
110 }
111
112 return mode;
113}
114
115static int pv88090_buck_set_mode(struct regulator_dev *rdev,
116 unsigned int mode)
117{
118 struct pv88090_regulator *info = rdev_get_drvdata(rdev);
119 int val = 0;
120
121 switch (mode) {
122 case REGULATOR_MODE_FAST:
123 val = PV88090_BUCK_MODE_SYNC;
124 break;
125 case REGULATOR_MODE_NORMAL:
126 val = PV88090_BUCK_MODE_AUTO;
127 break;
128 case REGULATOR_MODE_STANDBY:
129 val = PV88090_BUCK_MODE_SLEEP;
130 break;
131 default:
132 return -EINVAL;
133 }
134
135 return regmap_update_bits(rdev->regmap, info->conf,
136 PV88090_BUCK1_MODE_MASK, val);
137}
138
139static const struct regulator_ops pv88090_buck_ops = {
140 .get_mode = pv88090_buck_get_mode,
141 .set_mode = pv88090_buck_set_mode,
142 .enable = regulator_enable_regmap,
143 .disable = regulator_disable_regmap,
144 .is_enabled = regulator_is_enabled_regmap,
145 .set_voltage_sel = regulator_set_voltage_sel_regmap,
146 .get_voltage_sel = regulator_get_voltage_sel_regmap,
147 .list_voltage = regulator_list_voltage_linear,
148 .set_current_limit = regulator_set_current_limit_regmap,
149 .get_current_limit = regulator_get_current_limit_regmap,
150};
151
152static const struct regulator_ops pv88090_ldo_ops = {
153 .enable = regulator_enable_regmap,
154 .disable = regulator_disable_regmap,
155 .is_enabled = regulator_is_enabled_regmap,
156 .set_voltage_sel = regulator_set_voltage_sel_regmap,
157 .get_voltage_sel = regulator_get_voltage_sel_regmap,
158 .list_voltage = regulator_list_voltage_linear,
159};
160
161#define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \
162{\
163 .desc = {\
164 .id = chip##_ID_##regl_name,\
165 .name = __stringify(chip##_##regl_name),\
166 .of_match = of_match_ptr(#regl_name),\
167 .regulators_node = of_match_ptr("regulators"),\
168 .type = REGULATOR_VOLTAGE,\
169 .owner = THIS_MODULE,\
170 .ops = &pv88090_buck_ops,\
171 .min_uV = min, \
172 .uV_step = step, \
173 .n_voltages = ((max) - (min))/(step) + 1, \
174 .enable_reg = PV88090_REG_##regl_name##_CONF0, \
175 .enable_mask = PV88090_##regl_name##_EN, \
176 .vsel_reg = PV88090_REG_##regl_name##_CONF0, \
177 .vsel_mask = PV88090_V##regl_name##_MASK, \
178 .curr_table = limits_array, \
179 .n_current_limits = ARRAY_SIZE(limits_array), \
180 .csel_reg = PV88090_REG_##regl_name##_CONF1, \
181 .csel_mask = PV88090_##regl_name##_ILIM_MASK, \
182 },\
183 .conf = PV88090_REG_##regl_name##_CONF1, \
184 .conf2 = PV88090_REG_##regl_name##_CONF2, \
185}
186
187#define PV88090_LDO(chip, regl_name, min, step, max) \
188{\
189 .desc = {\
190 .id = chip##_ID_##regl_name,\
191 .name = __stringify(chip##_##regl_name),\
192 .of_match = of_match_ptr(#regl_name),\
193 .regulators_node = of_match_ptr("regulators"),\
194 .type = REGULATOR_VOLTAGE,\
195 .owner = THIS_MODULE,\
196 .ops = &pv88090_ldo_ops,\
197 .min_uV = min, \
198 .uV_step = step, \
199 .n_voltages = ((max) - (min))/(step) + 1, \
200 .enable_reg = PV88090_REG_##regl_name##_CONT, \
201 .enable_mask = PV88090_##regl_name##_EN, \
202 .vsel_reg = PV88090_REG_##regl_name##_CONT, \
203 .vsel_mask = PV88090_V##regl_name##_MASK, \
204 },\
205}
206
207static struct pv88090_regulator pv88090_regulator_info[] = {
208 PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,
209 pv88090_buck1_limits),
210 PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,
211 pv88090_buck23_limits),
212 PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,
213 pv88090_buck23_limits),
214 PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),
215 PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000),
216};
217
218static irqreturn_t pv88090_irq_handler(int irq, void *data)
219{
220 struct pv88090 *chip = data;
221 int i, reg_val, err, ret = IRQ_NONE;
222
223 err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, ®_val);
224 if (err < 0)
225 goto error_i2c;
226
227 if (reg_val & PV88090_E_VDD_FLT) {
228 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
229 if (chip->rdev[i] != NULL)
230 regulator_notifier_call_chain(chip->rdev[i],
231 REGULATOR_EVENT_UNDER_VOLTAGE,
232 NULL);
233 }
234
235 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
236 PV88090_E_VDD_FLT);
237 if (err < 0)
238 goto error_i2c;
239
240 ret = IRQ_HANDLED;
241 }
242
243 if (reg_val & PV88090_E_OVER_TEMP) {
244 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
245 if (chip->rdev[i] != NULL)
246 regulator_notifier_call_chain(chip->rdev[i],
247 REGULATOR_EVENT_OVER_TEMP,
248 NULL);
249 }
250
251 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
252 PV88090_E_OVER_TEMP);
253 if (err < 0)
254 goto error_i2c;
255
256 ret = IRQ_HANDLED;
257 }
258
259 return ret;
260
261error_i2c:
262 dev_err(chip->dev, "I2C error : %d\n", err);
263 return IRQ_NONE;
264}
265
266/*
267 * I2C driver interface functions
268 */
269static int pv88090_i2c_probe(struct i2c_client *i2c)
270{
271 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
272 struct pv88090 *chip;
273 struct regulator_config config = { };
274 int error, i, ret = 0;
275 unsigned int conf2, range, index;
276
277 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
278 if (!chip)
279 return -ENOMEM;
280
281 chip->dev = &i2c->dev;
282 chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config);
283 if (IS_ERR(chip->regmap)) {
284 error = PTR_ERR(chip->regmap);
285 dev_err(chip->dev, "Failed to allocate register map: %d\n",
286 error);
287 return error;
288 }
289
290 i2c_set_clientdata(i2c, chip);
291
292 if (i2c->irq != 0) {
293 ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF);
294 if (ret < 0) {
295 dev_err(chip->dev,
296 "Failed to mask A reg: %d\n", ret);
297 return ret;
298 }
299
300 ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF);
301 if (ret < 0) {
302 dev_err(chip->dev,
303 "Failed to mask B reg: %d\n", ret);
304 return ret;
305 }
306
307 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
308 pv88090_irq_handler,
309 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
310 "pv88090", chip);
311 if (ret != 0) {
312 dev_err(chip->dev, "Failed to request IRQ: %d\n",
313 i2c->irq);
314 return ret;
315 }
316
317 ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
318 PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0);
319 if (ret < 0) {
320 dev_err(chip->dev,
321 "Failed to update mask reg: %d\n", ret);
322 return ret;
323 }
324
325 } else {
326 dev_warn(chip->dev, "No IRQ configured\n");
327 }
328
329 config.dev = chip->dev;
330 config.regmap = chip->regmap;
331
332 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
333 if (init_data)
334 config.init_data = &init_data[i];
335
336 if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) {
337 ret = regmap_read(chip->regmap,
338 pv88090_regulator_info[i].conf2, &conf2);
339 if (ret < 0)
340 return ret;
341
342 conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &
343 PV88090_BUCK_VDAC_RANGE_MASK;
344
345 ret = regmap_read(chip->regmap,
346 PV88090_REG_BUCK_FOLD_RANGE, &range);
347 if (ret < 0)
348 return ret;
349
350 range = (range >>
351 (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
352 PV88090_BUCK_VRANGE_GAIN_MASK;
353 index = ((range << 1) | conf2);
354 if (index > PV88090_ID_BUCK3) {
355 dev_err(chip->dev,
356 "Invalid index(%d)\n", index);
357 return -EINVAL;
358 }
359
360 pv88090_regulator_info[i].desc.min_uV
361 = pv88090_buck_vol[index].min_uV;
362 pv88090_regulator_info[i].desc.uV_step
363 = pv88090_buck_vol[index].uV_step;
364 pv88090_regulator_info[i].desc.n_voltages
365 = ((pv88090_buck_vol[index].max_uV)
366 - (pv88090_buck_vol[index].min_uV))
367 /(pv88090_buck_vol[index].uV_step) + 1;
368 }
369
370 config.driver_data = (void *)&pv88090_regulator_info[i];
371 chip->rdev[i] = devm_regulator_register(chip->dev,
372 &pv88090_regulator_info[i].desc, &config);
373 if (IS_ERR(chip->rdev[i])) {
374 dev_err(chip->dev,
375 "Failed to register PV88090 regulator\n");
376 return PTR_ERR(chip->rdev[i]);
377 }
378 }
379
380 return 0;
381}
382
383static const struct i2c_device_id pv88090_i2c_id[] = {
384 {"pv88090", 0},
385 {},
386};
387MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);
388
389#ifdef CONFIG_OF
390static const struct of_device_id pv88090_dt_ids[] = {
391 { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
392 {},
393};
394MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
395#endif
396
397static struct i2c_driver pv88090_regulator_driver = {
398 .driver = {
399 .name = "pv88090",
400 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
401 .of_match_table = of_match_ptr(pv88090_dt_ids),
402 },
403 .probe = pv88090_i2c_probe,
404 .id_table = pv88090_i2c_id,
405};
406
407module_i2c_driver(pv88090_regulator_driver);
408
409MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
410MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
411MODULE_LICENSE("GPL");