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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
22enum {
23
24 PV88090_ID_BUCK1,
25 PV88090_ID_BUCK2,
26 PV88090_ID_BUCK3,
27
28
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
57
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_lock(chip->rdev[i]);
231 regulator_notifier_call_chain(chip->rdev[i],
232 REGULATOR_EVENT_UNDER_VOLTAGE,
233 NULL);
234 regulator_unlock(chip->rdev[i]);
235 }
236 }
237
238 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
239 PV88090_E_VDD_FLT);
240 if (err < 0)
241 goto error_i2c;
242
243 ret = IRQ_HANDLED;
244 }
245
246 if (reg_val & PV88090_E_OVER_TEMP) {
247 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
248 if (chip->rdev[i] != NULL) {
249 regulator_lock(chip->rdev[i]);
250 regulator_notifier_call_chain(chip->rdev[i],
251 REGULATOR_EVENT_OVER_TEMP,
252 NULL);
253 regulator_unlock(chip->rdev[i]);
254 }
255 }
256
257 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
258 PV88090_E_OVER_TEMP);
259 if (err < 0)
260 goto error_i2c;
261
262 ret = IRQ_HANDLED;
263 }
264
265 return ret;
266
267error_i2c:
268 dev_err(chip->dev, "I2C error : %d\n", err);
269 return IRQ_NONE;
270}
271
272
273
274
275static int pv88090_i2c_probe(struct i2c_client *i2c)
276{
277 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
278 struct pv88090 *chip;
279 struct regulator_config config = { };
280 int error, i, ret = 0;
281 unsigned int conf2, range, index;
282
283 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
284 if (!chip)
285 return -ENOMEM;
286
287 chip->dev = &i2c->dev;
288 chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config);
289 if (IS_ERR(chip->regmap)) {
290 error = PTR_ERR(chip->regmap);
291 dev_err(chip->dev, "Failed to allocate register map: %d\n",
292 error);
293 return error;
294 }
295
296 i2c_set_clientdata(i2c, chip);
297
298 if (i2c->irq != 0) {
299 ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF);
300 if (ret < 0) {
301 dev_err(chip->dev,
302 "Failed to mask A reg: %d\n", ret);
303 return ret;
304 }
305
306 ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF);
307 if (ret < 0) {
308 dev_err(chip->dev,
309 "Failed to mask B reg: %d\n", ret);
310 return ret;
311 }
312
313 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
314 pv88090_irq_handler,
315 IRQF_TRIGGER_LOW|IRQF_ONESHOT,
316 "pv88090", chip);
317 if (ret != 0) {
318 dev_err(chip->dev, "Failed to request IRQ: %d\n",
319 i2c->irq);
320 return ret;
321 }
322
323 ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
324 PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0);
325 if (ret < 0) {
326 dev_err(chip->dev,
327 "Failed to update mask reg: %d\n", ret);
328 return ret;
329 }
330
331 } else {
332 dev_warn(chip->dev, "No IRQ configured\n");
333 }
334
335 config.dev = chip->dev;
336 config.regmap = chip->regmap;
337
338 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
339 if (init_data)
340 config.init_data = &init_data[i];
341
342 if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) {
343 ret = regmap_read(chip->regmap,
344 pv88090_regulator_info[i].conf2, &conf2);
345 if (ret < 0)
346 return ret;
347
348 conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &
349 PV88090_BUCK_VDAC_RANGE_MASK;
350
351 ret = regmap_read(chip->regmap,
352 PV88090_REG_BUCK_FOLD_RANGE, &range);
353 if (ret < 0)
354 return ret;
355
356 range = (range >>
357 (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
358 PV88090_BUCK_VRANGE_GAIN_MASK;
359 index = ((range << 1) | conf2);
360 if (index > PV88090_ID_BUCK3) {
361 dev_err(chip->dev,
362 "Invalid index(%d)\n", index);
363 return -EINVAL;
364 }
365
366 pv88090_regulator_info[i].desc.min_uV
367 = pv88090_buck_vol[index].min_uV;
368 pv88090_regulator_info[i].desc.uV_step
369 = pv88090_buck_vol[index].uV_step;
370 pv88090_regulator_info[i].desc.n_voltages
371 = ((pv88090_buck_vol[index].max_uV)
372 - (pv88090_buck_vol[index].min_uV))
373 /(pv88090_buck_vol[index].uV_step) + 1;
374 }
375
376 config.driver_data = (void *)&pv88090_regulator_info[i];
377 chip->rdev[i] = devm_regulator_register(chip->dev,
378 &pv88090_regulator_info[i].desc, &config);
379 if (IS_ERR(chip->rdev[i])) {
380 dev_err(chip->dev,
381 "Failed to register PV88090 regulator\n");
382 return PTR_ERR(chip->rdev[i]);
383 }
384 }
385
386 return 0;
387}
388
389static const struct i2c_device_id pv88090_i2c_id[] = {
390 {"pv88090", 0},
391 {},
392};
393MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);
394
395#ifdef CONFIG_OF
396static const struct of_device_id pv88090_dt_ids[] = {
397 { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
398 {},
399};
400MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
401#endif
402
403static struct i2c_driver pv88090_regulator_driver = {
404 .driver = {
405 .name = "pv88090",
406 .of_match_table = of_match_ptr(pv88090_dt_ids),
407 },
408 .probe_new = pv88090_i2c_probe,
409 .id_table = pv88090_i2c_id,
410};
411
412module_i2c_driver(pv88090_regulator_driver);
413
414MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
415MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
416MODULE_LICENSE("GPL");
417
