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0ae3b061 AL |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // pv88060-regulator.c - Regulator device driver for PV88060 | |
4 | // Copyright (C) 2015 Powerventure Semiconductor Ltd. | |
f307a7e9 JB |
5 | |
6 | #include <linux/err.h> | |
f307a7e9 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> | |
f307a7e9 JB |
17 | #include "pv88060-regulator.h" |
18 | ||
19 | #define PV88060_MAX_REGULATORS 14 | |
20 | ||
21 | /* PV88060 REGULATOR IDs */ | |
22 | enum { | |
23 | /* BUCKs */ | |
24 | PV88060_ID_BUCK1, | |
25 | ||
26 | /* LDOs */ | |
27 | PV88060_ID_LDO1, | |
28 | PV88060_ID_LDO2, | |
29 | PV88060_ID_LDO3, | |
30 | PV88060_ID_LDO4, | |
31 | PV88060_ID_LDO5, | |
32 | PV88060_ID_LDO6, | |
33 | PV88060_ID_LDO7, | |
34 | ||
35 | /* SWTs */ | |
36 | PV88060_ID_SW1, | |
37 | PV88060_ID_SW2, | |
38 | PV88060_ID_SW3, | |
39 | PV88060_ID_SW4, | |
40 | PV88060_ID_SW5, | |
41 | PV88060_ID_SW6, | |
42 | }; | |
43 | ||
44 | struct pv88060_regulator { | |
45 | struct regulator_desc desc; | |
f307a7e9 JB |
46 | unsigned int conf; /* buck configuration register */ |
47 | }; | |
48 | ||
49 | struct pv88060 { | |
50 | struct device *dev; | |
51 | struct regmap *regmap; | |
52 | struct regulator_dev *rdev[PV88060_MAX_REGULATORS]; | |
53 | }; | |
54 | ||
55 | static const struct regmap_config pv88060_regmap_config = { | |
56 | .reg_bits = 8, | |
57 | .val_bits = 8, | |
58 | }; | |
59 | ||
60 | /* Current limits array (in uA) for BUCK1 | |
61 | * Entry indexes corresponds to register values. | |
62 | */ | |
63 | ||
9a5b3e5b | 64 | static const unsigned int pv88060_buck1_limits[] = { |
f307a7e9 JB |
65 | 1496000, 2393000, 3291000, 4189000 |
66 | }; | |
67 | ||
68 | static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev) | |
69 | { | |
70 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); | |
71 | unsigned int data; | |
72 | int ret, mode = 0; | |
73 | ||
74 | ret = regmap_read(rdev->regmap, info->conf, &data); | |
75 | if (ret < 0) | |
76 | return ret; | |
77 | ||
78 | switch (data & PV88060_BUCK_MODE_MASK) { | |
79 | case PV88060_BUCK_MODE_SYNC: | |
80 | mode = REGULATOR_MODE_FAST; | |
81 | break; | |
82 | case PV88060_BUCK_MODE_AUTO: | |
83 | mode = REGULATOR_MODE_NORMAL; | |
84 | break; | |
85 | case PV88060_BUCK_MODE_SLEEP: | |
86 | mode = REGULATOR_MODE_STANDBY; | |
87 | break; | |
88 | } | |
89 | ||
90 | return mode; | |
91 | } | |
92 | ||
93 | static int pv88060_buck_set_mode(struct regulator_dev *rdev, | |
94 | unsigned int mode) | |
95 | { | |
96 | struct pv88060_regulator *info = rdev_get_drvdata(rdev); | |
97 | int val = 0; | |
98 | ||
99 | switch (mode) { | |
100 | case REGULATOR_MODE_FAST: | |
101 | val = PV88060_BUCK_MODE_SYNC; | |
102 | break; | |
103 | case REGULATOR_MODE_NORMAL: | |
104 | val = PV88060_BUCK_MODE_AUTO; | |
105 | break; | |
106 | case REGULATOR_MODE_STANDBY: | |
107 | val = PV88060_BUCK_MODE_SLEEP; | |
108 | break; | |
109 | default: | |
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | return regmap_update_bits(rdev->regmap, info->conf, | |
114 | PV88060_BUCK_MODE_MASK, val); | |
115 | } | |
116 | ||
ea51874c | 117 | static const struct regulator_ops pv88060_buck_ops = { |
f307a7e9 JB |
118 | .get_mode = pv88060_buck_get_mode, |
119 | .set_mode = pv88060_buck_set_mode, | |
120 | .enable = regulator_enable_regmap, | |
121 | .disable = regulator_disable_regmap, | |
122 | .is_enabled = regulator_is_enabled_regmap, | |
123 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
124 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
125 | .list_voltage = regulator_list_voltage_linear, | |
9a5b3e5b AL |
126 | .set_current_limit = regulator_set_current_limit_regmap, |
127 | .get_current_limit = regulator_get_current_limit_regmap, | |
f307a7e9 JB |
128 | }; |
129 | ||
ea51874c | 130 | static const struct regulator_ops pv88060_ldo_ops = { |
f307a7e9 JB |
131 | .enable = regulator_enable_regmap, |
132 | .disable = regulator_disable_regmap, | |
133 | .is_enabled = regulator_is_enabled_regmap, | |
134 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
135 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
136 | .list_voltage = regulator_list_voltage_linear, | |
137 | }; | |
138 | ||
55e72728 AL |
139 | static const struct regulator_ops pv88060_sw_ops = { |
140 | .enable = regulator_enable_regmap, | |
141 | .disable = regulator_disable_regmap, | |
142 | .is_enabled = regulator_is_enabled_regmap, | |
143 | }; | |
144 | ||
f307a7e9 JB |
145 | #define PV88060_BUCK(chip, regl_name, min, step, max, limits_array) \ |
146 | {\ | |
147 | .desc = {\ | |
148 | .id = chip##_ID_##regl_name,\ | |
149 | .name = __stringify(chip##_##regl_name),\ | |
150 | .of_match = of_match_ptr(#regl_name),\ | |
151 | .regulators_node = of_match_ptr("regulators"),\ | |
152 | .type = REGULATOR_VOLTAGE,\ | |
153 | .owner = THIS_MODULE,\ | |
154 | .ops = &pv88060_buck_ops,\ | |
155 | .min_uV = min,\ | |
156 | .uV_step = step,\ | |
157 | .n_voltages = ((max) - (min))/(step) + 1,\ | |
158 | .enable_reg = PV88060_REG_##regl_name##_CONF0,\ | |
159 | .enable_mask = PV88060_BUCK_EN, \ | |
160 | .vsel_reg = PV88060_REG_##regl_name##_CONF0,\ | |
161 | .vsel_mask = PV88060_VBUCK_MASK,\ | |
9a5b3e5b AL |
162 | .curr_table = limits_array,\ |
163 | .n_current_limits = ARRAY_SIZE(limits_array),\ | |
164 | .csel_reg = PV88060_REG_##regl_name##_CONF1,\ | |
165 | .csel_mask = PV88060_BUCK_ILIM_MASK,\ | |
f307a7e9 | 166 | },\ |
f307a7e9 JB |
167 | .conf = PV88060_REG_##regl_name##_CONF1,\ |
168 | } | |
169 | ||
170 | #define PV88060_LDO(chip, regl_name, min, step, max) \ | |
171 | {\ | |
172 | .desc = {\ | |
173 | .id = chip##_ID_##regl_name,\ | |
174 | .name = __stringify(chip##_##regl_name),\ | |
175 | .of_match = of_match_ptr(#regl_name),\ | |
176 | .regulators_node = of_match_ptr("regulators"),\ | |
177 | .type = REGULATOR_VOLTAGE,\ | |
178 | .owner = THIS_MODULE,\ | |
179 | .ops = &pv88060_ldo_ops,\ | |
180 | .min_uV = min, \ | |
181 | .uV_step = step, \ | |
182 | .n_voltages = (step) ? ((max - min) / step + 1) : 1, \ | |
183 | .enable_reg = PV88060_REG_##regl_name##_CONF, \ | |
184 | .enable_mask = PV88060_LDO_EN, \ | |
185 | .vsel_reg = PV88060_REG_##regl_name##_CONF, \ | |
186 | .vsel_mask = PV88060_VLDO_MASK, \ | |
187 | },\ | |
188 | } | |
189 | ||
190 | #define PV88060_SW(chip, regl_name, max) \ | |
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,\ | |
55e72728 AL |
199 | .ops = &pv88060_sw_ops,\ |
200 | .fixed_uV = max,\ | |
f307a7e9 JB |
201 | .n_voltages = 1,\ |
202 | .enable_reg = PV88060_REG_##regl_name##_CONF,\ | |
203 | .enable_mask = PV88060_SW_EN,\ | |
204 | },\ | |
205 | } | |
206 | ||
207 | static const struct pv88060_regulator pv88060_regulator_info[] = { | |
208 | PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500, | |
209 | pv88060_buck1_limits), | |
210 | PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000), | |
211 | PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000), | |
212 | PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000), | |
213 | PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000), | |
214 | PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000), | |
215 | PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000), | |
216 | PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000), | |
217 | PV88060_SW(PV88060, SW1, 5000000), | |
218 | PV88060_SW(PV88060, SW2, 5000000), | |
219 | PV88060_SW(PV88060, SW3, 5000000), | |
220 | PV88060_SW(PV88060, SW4, 5000000), | |
221 | PV88060_SW(PV88060, SW5, 5000000), | |
222 | PV88060_SW(PV88060, SW6, 5000000), | |
223 | }; | |
224 | ||
225 | static irqreturn_t pv88060_irq_handler(int irq, void *data) | |
226 | { | |
227 | struct pv88060 *chip = data; | |
228 | int i, reg_val, err, ret = IRQ_NONE; | |
229 | ||
230 | err = regmap_read(chip->regmap, PV88060_REG_EVENT_A, ®_val); | |
231 | if (err < 0) | |
232 | goto error_i2c; | |
233 | ||
234 | if (reg_val & PV88060_E_VDD_FLT) { | |
235 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { | |
e9c142b0 | 236 | if (chip->rdev[i] != NULL) |
f307a7e9 JB |
237 | regulator_notifier_call_chain(chip->rdev[i], |
238 | REGULATOR_EVENT_UNDER_VOLTAGE, | |
239 | NULL); | |
f307a7e9 JB |
240 | } |
241 | ||
a7c2ded6 JB |
242 | err = regmap_write(chip->regmap, PV88060_REG_EVENT_A, |
243 | PV88060_E_VDD_FLT); | |
f307a7e9 JB |
244 | if (err < 0) |
245 | goto error_i2c; | |
246 | ||
247 | ret = IRQ_HANDLED; | |
248 | } | |
249 | ||
250 | if (reg_val & PV88060_E_OVER_TEMP) { | |
251 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { | |
e9c142b0 | 252 | if (chip->rdev[i] != NULL) |
f307a7e9 JB |
253 | regulator_notifier_call_chain(chip->rdev[i], |
254 | REGULATOR_EVENT_OVER_TEMP, | |
255 | NULL); | |
f307a7e9 JB |
256 | } |
257 | ||
a7c2ded6 JB |
258 | err = regmap_write(chip->regmap, PV88060_REG_EVENT_A, |
259 | PV88060_E_OVER_TEMP); | |
f307a7e9 JB |
260 | if (err < 0) |
261 | goto error_i2c; | |
262 | ||
263 | ret = IRQ_HANDLED; | |
264 | } | |
265 | ||
266 | return ret; | |
267 | ||
268 | error_i2c: | |
269 | dev_err(chip->dev, "I2C error : %d\n", err); | |
270 | return IRQ_NONE; | |
271 | } | |
272 | ||
273 | /* | |
274 | * I2C driver interface functions | |
275 | */ | |
77e29598 | 276 | static int pv88060_i2c_probe(struct i2c_client *i2c) |
f307a7e9 JB |
277 | { |
278 | struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); | |
279 | struct pv88060 *chip; | |
280 | struct regulator_config config = { }; | |
281 | int error, i, ret = 0; | |
282 | ||
283 | chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88060), GFP_KERNEL); | |
284 | if (!chip) | |
285 | return -ENOMEM; | |
286 | ||
287 | chip->dev = &i2c->dev; | |
288 | chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_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, PV88060_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 | ||
3c0a2f64 | 306 | ret = regmap_write(chip->regmap, PV88060_REG_MASK_B, 0xFF); |
f307a7e9 JB |
307 | if (ret < 0) { |
308 | dev_err(chip->dev, | |
309 | "Failed to mask B reg: %d\n", ret); | |
310 | return ret; | |
311 | } | |
312 | ||
3c0a2f64 | 313 | ret = regmap_write(chip->regmap, PV88060_REG_MASK_C, 0xFF); |
f307a7e9 JB |
314 | if (ret < 0) { |
315 | dev_err(chip->dev, | |
316 | "Failed to mask C reg: %d\n", ret); | |
317 | return ret; | |
318 | } | |
319 | ||
88467943 | 320 | ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
f307a7e9 JB |
321 | pv88060_irq_handler, |
322 | IRQF_TRIGGER_LOW|IRQF_ONESHOT, | |
323 | "pv88060", chip); | |
324 | if (ret != 0) { | |
325 | dev_err(chip->dev, "Failed to request IRQ: %d\n", | |
326 | i2c->irq); | |
327 | return ret; | |
328 | } | |
329 | ||
330 | ret = regmap_update_bits(chip->regmap, PV88060_REG_MASK_A, | |
331 | PV88060_M_VDD_FLT | PV88060_M_OVER_TEMP, 0); | |
332 | if (ret < 0) { | |
333 | dev_err(chip->dev, | |
334 | "Failed to update mask reg: %d\n", ret); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | } else { | |
339 | dev_warn(chip->dev, "No IRQ configured\n"); | |
340 | } | |
341 | ||
342 | config.dev = chip->dev; | |
343 | config.regmap = chip->regmap; | |
344 | ||
345 | for (i = 0; i < PV88060_MAX_REGULATORS; i++) { | |
346 | if (init_data) | |
347 | config.init_data = &init_data[i]; | |
348 | ||
349 | config.driver_data = (void *)&pv88060_regulator_info[i]; | |
350 | chip->rdev[i] = devm_regulator_register(chip->dev, | |
351 | &pv88060_regulator_info[i].desc, &config); | |
352 | if (IS_ERR(chip->rdev[i])) { | |
353 | dev_err(chip->dev, | |
354 | "Failed to register PV88060 regulator\n"); | |
355 | return PTR_ERR(chip->rdev[i]); | |
356 | } | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | static const struct i2c_device_id pv88060_i2c_id[] = { | |
363 | {"pv88060", 0}, | |
364 | {}, | |
365 | }; | |
366 | MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id); | |
367 | ||
368 | #ifdef CONFIG_OF | |
369 | static const struct of_device_id pv88060_dt_ids[] = { | |
370 | { .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] }, | |
371 | {}, | |
372 | }; | |
373 | MODULE_DEVICE_TABLE(of, pv88060_dt_ids); | |
374 | #endif | |
375 | ||
376 | static struct i2c_driver pv88060_regulator_driver = { | |
377 | .driver = { | |
378 | .name = "pv88060", | |
379 | .of_match_table = of_match_ptr(pv88060_dt_ids), | |
380 | }, | |
77e29598 | 381 | .probe_new = pv88060_i2c_probe, |
f307a7e9 JB |
382 | .id_table = pv88060_i2c_id, |
383 | }; | |
384 | ||
385 | module_i2c_driver(pv88060_regulator_driver); | |
386 | ||
387 | MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); | |
388 | MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060"); | |
389 | MODULE_LICENSE("GPL"); |