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0ae3b061 AL |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // pv88090-regulator.c - Regulator device driver for PV88090 | |
4 | // Copyright (C) 2015 Powerventure Semiconductor Ltd. | |
c90456e3 JB |
5 | |
6 | #include <linux/err.h> | |
c90456e3 JB |
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> | |
c90456e3 JB |
17 | #include "pv88090-regulator.h" |
18 | ||
19 | #define PV88090_MAX_REGULATORS 5 | |
20 | ||
21 | /* PV88090 REGULATOR IDs */ | |
22 | enum { | |
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 | ||
33 | struct pv88090_regulator { | |
34 | struct regulator_desc desc; | |
c90456e3 JB |
35 | unsigned int conf; |
36 | unsigned int conf2; | |
37 | }; | |
38 | ||
39 | struct pv88090 { | |
40 | struct device *dev; | |
41 | struct regmap *regmap; | |
42 | struct regulator_dev *rdev[PV88090_MAX_REGULATORS]; | |
43 | }; | |
44 | ||
45 | struct pv88090_buck_voltage { | |
46 | int min_uV; | |
47 | int max_uV; | |
48 | int uV_step; | |
49 | }; | |
50 | ||
51 | static 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 | ||
f4afd05e | 60 | static const unsigned int pv88090_buck1_limits[] = { |
c90456e3 JB |
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 | ||
f4afd05e | 67 | static const unsigned int pv88090_buck23_limits[] = { |
c90456e3 JB |
68 | 1496000, 2393000, 3291000, 4189000 |
69 | }; | |
70 | ||
71 | static 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 | ||
90 | static 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 | ||
115 | static 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 | ||
36fe20c7 | 139 | static const struct regulator_ops pv88090_buck_ops = { |
c90456e3 JB |
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, | |
f4afd05e AL |
148 | .set_current_limit = regulator_set_current_limit_regmap, |
149 | .get_current_limit = regulator_get_current_limit_regmap, | |
c90456e3 JB |
150 | }; |
151 | ||
36fe20c7 | 152 | static const struct regulator_ops pv88090_ldo_ops = { |
c90456e3 JB |
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, \ | |
f4afd05e AL |
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, \ | |
c90456e3 | 182 | },\ |
c90456e3 JB |
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 | ||
207 | static 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 | ||
218 | static 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++) { | |
e9c142b0 | 229 | if (chip->rdev[i] != NULL) |
c90456e3 JB |
230 | regulator_notifier_call_chain(chip->rdev[i], |
231 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
232 | NULL); | |
c90456e3 JB |
233 | } |
234 | ||
623f7b93 JB |
235 | err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
236 | PV88090_E_VDD_FLT); | |
c90456e3 JB |
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++) { | |
e9c142b0 | 245 | if (chip->rdev[i] != NULL) |
c90456e3 JB |
246 | regulator_notifier_call_chain(chip->rdev[i], |
247 | REGULATOR_EVENT_OVER_TEMP, | |
248 | NULL); | |
c90456e3 JB |
249 | } |
250 | ||
623f7b93 JB |
251 | err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
252 | PV88090_E_OVER_TEMP); | |
c90456e3 JB |
253 | if (err < 0) |
254 | goto error_i2c; | |
255 | ||
256 | ret = IRQ_HANDLED; | |
257 | } | |
258 | ||
259 | return ret; | |
260 | ||
261 | error_i2c: | |
262 | dev_err(chip->dev, "I2C error : %d\n", err); | |
263 | return IRQ_NONE; | |
264 | } | |
265 | ||
266 | /* | |
267 | * I2C driver interface functions | |
268 | */ | |
77e29598 | 269 | static int pv88090_i2c_probe(struct i2c_client *i2c) |
c90456e3 JB |
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 | ||
ecee988a | 307 | ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
c90456e3 JB |
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 | ||
d761c906 DC |
342 | conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) & |
343 | PV88090_BUCK_VDAC_RANGE_MASK; | |
c90456e3 JB |
344 | |
345 | ret = regmap_read(chip->regmap, | |
346 | PV88090_REG_BUCK_FOLD_RANGE, &range); | |
347 | if (ret < 0) | |
348 | return ret; | |
349 | ||
d761c906 | 350 | range = (range >> |
8986a119 EJ |
351 | (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) & |
352 | PV88090_BUCK_VRANGE_GAIN_MASK; | |
c90456e3 | 353 | index = ((range << 1) | conf2); |
8986a119 EJ |
354 | if (index > PV88090_ID_BUCK3) { |
355 | dev_err(chip->dev, | |
356 | "Invalid index(%d)\n", index); | |
357 | return -EINVAL; | |
358 | } | |
c90456e3 JB |
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 | ||
383 | static const struct i2c_device_id pv88090_i2c_id[] = { | |
384 | {"pv88090", 0}, | |
385 | {}, | |
386 | }; | |
387 | MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id); | |
388 | ||
389 | #ifdef CONFIG_OF | |
390 | static const struct of_device_id pv88090_dt_ids[] = { | |
391 | { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] }, | |
392 | {}, | |
393 | }; | |
394 | MODULE_DEVICE_TABLE(of, pv88090_dt_ids); | |
395 | #endif | |
396 | ||
397 | static struct i2c_driver pv88090_regulator_driver = { | |
398 | .driver = { | |
399 | .name = "pv88090", | |
259b93b2 | 400 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
c90456e3 JB |
401 | .of_match_table = of_match_ptr(pv88090_dt_ids), |
402 | }, | |
964e1865 | 403 | .probe = pv88090_i2c_probe, |
c90456e3 JB |
404 | .id_table = pv88090_i2c_id, |
405 | }; | |
406 | ||
407 | module_i2c_driver(pv88090_regulator_driver); | |
408 | ||
409 | MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); | |
410 | MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090"); | |
411 | MODULE_LICENSE("GPL"); |