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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
35enum {
36
37 PV88060_ID_BUCK1,
38
39
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
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
57struct pv88060_regulator {
58 struct regulator_desc desc;
59
60 unsigned n_current_limits;
61 const int *current_limits;
62 unsigned int limit_mask;
63 unsigned int conf;
64};
65
66struct pv88060 {
67 struct device *dev;
68 struct regmap *regmap;
69 struct regulator_dev *rdev[PV88060_MAX_REGULATORS];
70};
71
72static const struct regmap_config pv88060_regmap_config = {
73 .reg_bits = 8,
74 .val_bits = 8,
75};
76
77
78
79
80
81static const int pv88060_buck1_limits[] = {
82 1496000, 2393000, 3291000, 4189000
83};
84
85static 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
110static 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
134static 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
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
154static 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
168static 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
181static 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
252static 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
270static 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_write(chip->regmap, PV88060_REG_EVENT_A,
289 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_write(chip->regmap, PV88060_REG_EVENT_A,
306 PV88060_E_OVER_TEMP);
307 if (err < 0)
308 goto error_i2c;
309
310 ret = IRQ_HANDLED;
311 }
312
313 return ret;
314
315error_i2c:
316 dev_err(chip->dev, "I2C error : %d\n", err);
317 return IRQ_NONE;
318}
319
320
321
322
323static 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
354 ret = regmap_write(chip->regmap, PV88060_REG_MASK_B, 0xFF);
355 if (ret < 0) {
356 dev_err(chip->dev,
357 "Failed to mask B reg: %d\n", ret);
358 return ret;
359 }
360
361 ret = regmap_write(chip->regmap, PV88060_REG_MASK_C, 0xFF);
362 if (ret < 0) {
363 dev_err(chip->dev,
364 "Failed to mask C reg: %d\n", ret);
365 return ret;
366 }
367
368 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
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
410static const struct i2c_device_id pv88060_i2c_id[] = {
411 {"pv88060", 0},
412 {},
413};
414MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id);
415
416#ifdef CONFIG_OF
417static const struct of_device_id pv88060_dt_ids[] = {
418 { .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] },
419 {},
420};
421MODULE_DEVICE_TABLE(of, pv88060_dt_ids);
422#endif
423
424static 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
433module_i2c_driver(pv88060_regulator_driver);
434
435MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
436MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060");
437MODULE_LICENSE("GPL");
438
