1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // |
3 | // max8998.c - Voltage regulator driver for the Maxim 8998 |
4 | // |
5 | // Copyright (C) 2009-2010 Samsung Electronics |
6 | // Kyungmin Park <kyungmin.park@samsung.com> |
7 | // Marek Szyprowski <m.szyprowski@samsung.com> |
8 | |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> |
11 | #include <linux/i2c.h> |
12 | #include <linux/err.h> |
13 | #include <linux/bits.h> |
14 | #include <linux/gpio/consumer.h> |
15 | #include <linux/slab.h> |
16 | #include <linux/interrupt.h> |
17 | #include <linux/mutex.h> |
18 | #include <linux/of.h> |
19 | #include <linux/platform_device.h> |
20 | #include <linux/regulator/driver.h> |
21 | #include <linux/regulator/of_regulator.h> |
22 | #include <linux/mfd/max8998.h> |
23 | #include <linux/mfd/max8998-private.h> |
24 | |
25 | struct max8998_data { |
26 | struct device *dev; |
27 | struct max8998_dev *iodev; |
28 | int num_regulators; |
29 | u8 buck1_vol[4]; /* voltages for selection */ |
30 | u8 buck2_vol[2]; |
31 | unsigned int buck1_idx; /* index to last changed voltage */ |
32 | /* value in a set */ |
33 | unsigned int buck2_idx; |
34 | struct gpio_desc *buck1_gpio1; |
35 | struct gpio_desc *buck1_gpio2; |
36 | struct gpio_desc *buck2_gpio; |
37 | }; |
38 | |
39 | static const unsigned int charger_current_table[] = { |
40 | 90000, 380000, 475000, 550000, 570000, 600000, 700000, 800000, |
41 | }; |
42 | |
43 | static int max8998_get_enable_register(struct regulator_dev *rdev, |
44 | int *reg, int *shift) |
45 | { |
46 | int ldo = rdev_get_id(rdev); |
47 | |
48 | switch (ldo) { |
49 | case MAX8998_LDO2 ... MAX8998_LDO5: |
50 | *reg = MAX8998_REG_ONOFF1; |
51 | *shift = 3 - (ldo - MAX8998_LDO2); |
52 | break; |
53 | case MAX8998_LDO6 ... MAX8998_LDO13: |
54 | *reg = MAX8998_REG_ONOFF2; |
55 | *shift = 7 - (ldo - MAX8998_LDO6); |
56 | break; |
57 | case MAX8998_LDO14 ... MAX8998_LDO17: |
58 | *reg = MAX8998_REG_ONOFF3; |
59 | *shift = 7 - (ldo - MAX8998_LDO14); |
60 | break; |
61 | case MAX8998_BUCK1 ... MAX8998_BUCK4: |
62 | *reg = MAX8998_REG_ONOFF1; |
63 | *shift = 7 - (ldo - MAX8998_BUCK1); |
64 | break; |
65 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: |
66 | *reg = MAX8998_REG_ONOFF4; |
67 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); |
68 | break; |
69 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: |
70 | *reg = MAX8998_REG_CHGR2; |
71 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); |
72 | break; |
73 | case MAX8998_CHARGER: |
74 | *reg = MAX8998_REG_CHGR2; |
75 | *shift = 0; |
76 | break; |
77 | default: |
78 | return -EINVAL; |
79 | } |
80 | |
81 | return 0; |
82 | } |
83 | |
84 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) |
85 | { |
86 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
87 | struct i2c_client *i2c = max8998->iodev->i2c; |
88 | int ret, reg, shift = 8; |
89 | u8 val; |
90 | |
91 | ret = max8998_get_enable_register(rdev, reg: ®, shift: &shift); |
92 | if (ret) |
93 | return ret; |
94 | |
95 | ret = max8998_read_reg(i2c, reg, dest: &val); |
96 | if (ret) |
97 | return ret; |
98 | |
99 | return val & (1 << shift); |
100 | } |
101 | |
102 | static int max8998_ldo_is_enabled_inverted(struct regulator_dev *rdev) |
103 | { |
104 | return (!max8998_ldo_is_enabled(rdev)); |
105 | } |
106 | |
107 | static int max8998_ldo_enable(struct regulator_dev *rdev) |
108 | { |
109 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
110 | struct i2c_client *i2c = max8998->iodev->i2c; |
111 | int reg, shift = 8, ret; |
112 | |
113 | ret = max8998_get_enable_register(rdev, reg: ®, shift: &shift); |
114 | if (ret) |
115 | return ret; |
116 | |
117 | return max8998_update_reg(i2c, reg, val: 1<<shift, mask: 1<<shift); |
118 | } |
119 | |
120 | static int max8998_ldo_disable(struct regulator_dev *rdev) |
121 | { |
122 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
123 | struct i2c_client *i2c = max8998->iodev->i2c; |
124 | int reg, shift = 8, ret; |
125 | |
126 | ret = max8998_get_enable_register(rdev, reg: ®, shift: &shift); |
127 | if (ret) |
128 | return ret; |
129 | |
130 | return max8998_update_reg(i2c, reg, val: 0, mask: 1<<shift); |
131 | } |
132 | |
133 | static int max8998_get_voltage_register(struct regulator_dev *rdev, |
134 | int *_reg, int *_shift, int *_mask) |
135 | { |
136 | int ldo = rdev_get_id(rdev); |
137 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
138 | int reg, shift = 0, mask = 0xff; |
139 | |
140 | switch (ldo) { |
141 | case MAX8998_LDO2 ... MAX8998_LDO3: |
142 | reg = MAX8998_REG_LDO2_LDO3; |
143 | mask = 0xf; |
144 | if (ldo == MAX8998_LDO2) |
145 | shift = 4; |
146 | else |
147 | shift = 0; |
148 | break; |
149 | case MAX8998_LDO4 ... MAX8998_LDO7: |
150 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); |
151 | break; |
152 | case MAX8998_LDO8 ... MAX8998_LDO9: |
153 | reg = MAX8998_REG_LDO8_LDO9; |
154 | mask = 0xf; |
155 | if (ldo == MAX8998_LDO8) |
156 | shift = 4; |
157 | else |
158 | shift = 0; |
159 | break; |
160 | case MAX8998_LDO10 ... MAX8998_LDO11: |
161 | reg = MAX8998_REG_LDO10_LDO11; |
162 | if (ldo == MAX8998_LDO10) { |
163 | shift = 5; |
164 | mask = 0x7; |
165 | } else { |
166 | shift = 0; |
167 | mask = 0x1f; |
168 | } |
169 | break; |
170 | case MAX8998_LDO12 ... MAX8998_LDO17: |
171 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); |
172 | break; |
173 | case MAX8998_BUCK1: |
174 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
175 | break; |
176 | case MAX8998_BUCK2: |
177 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
178 | break; |
179 | case MAX8998_BUCK3: |
180 | reg = MAX8998_REG_BUCK3; |
181 | break; |
182 | case MAX8998_BUCK4: |
183 | reg = MAX8998_REG_BUCK4; |
184 | break; |
185 | default: |
186 | return -EINVAL; |
187 | } |
188 | |
189 | *_reg = reg; |
190 | *_shift = shift; |
191 | *_mask = mask; |
192 | |
193 | return 0; |
194 | } |
195 | |
196 | static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
197 | { |
198 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
199 | struct i2c_client *i2c = max8998->iodev->i2c; |
200 | int reg, shift = 0, mask, ret; |
201 | u8 val; |
202 | |
203 | ret = max8998_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
204 | if (ret) |
205 | return ret; |
206 | |
207 | ret = max8998_read_reg(i2c, reg, dest: &val); |
208 | if (ret) |
209 | return ret; |
210 | |
211 | val >>= shift; |
212 | val &= mask; |
213 | |
214 | return val; |
215 | } |
216 | |
217 | static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, |
218 | unsigned selector) |
219 | { |
220 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
221 | struct i2c_client *i2c = max8998->iodev->i2c; |
222 | int reg, shift = 0, mask, ret; |
223 | |
224 | ret = max8998_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
225 | if (ret) |
226 | return ret; |
227 | |
228 | ret = max8998_update_reg(i2c, reg, val: selector<<shift, mask: mask<<shift); |
229 | |
230 | return ret; |
231 | } |
232 | |
233 | static inline void buck1_gpio_set(struct gpio_desc *gpio1, struct gpio_desc *gpio2, int v) |
234 | { |
235 | gpiod_set_value(desc: gpio1, value: v & 0x1); |
236 | gpiod_set_value(desc: gpio2, value: (v >> 1) & 0x1); |
237 | } |
238 | |
239 | static inline void buck2_gpio_set(struct gpio_desc *gpio, int v) |
240 | { |
241 | gpiod_set_value(desc: gpio, value: v & 0x1); |
242 | } |
243 | |
244 | static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, |
245 | unsigned selector) |
246 | { |
247 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
248 | struct max8998_platform_data *pdata = max8998->iodev->pdata; |
249 | struct i2c_client *i2c = max8998->iodev->i2c; |
250 | int buck = rdev_get_id(rdev); |
251 | int reg, shift = 0, mask, ret, j; |
252 | static u8 buck1_last_val; |
253 | |
254 | ret = max8998_get_voltage_register(rdev, reg: ®, shift: &shift, mask: &mask); |
255 | if (ret) |
256 | return ret; |
257 | |
258 | switch (buck) { |
259 | case MAX8998_BUCK1: |
260 | dev_dbg(max8998->dev, |
261 | "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
262 | "buck1_vol3:%d, buck1_vol4:%d\n" , |
263 | selector, max8998->buck1_vol[0], max8998->buck1_vol[1], |
264 | max8998->buck1_vol[2], max8998->buck1_vol[3]); |
265 | |
266 | if (max8998->buck1_gpio1 && max8998->buck1_gpio2) { |
267 | |
268 | /* check if requested voltage */ |
269 | /* value is already defined */ |
270 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { |
271 | if (max8998->buck1_vol[j] == selector) { |
272 | max8998->buck1_idx = j; |
273 | buck1_gpio_set(gpio1: max8998->buck1_gpio1, |
274 | gpio2: max8998->buck1_gpio2, v: j); |
275 | goto buck1_exit; |
276 | } |
277 | } |
278 | |
279 | if (pdata->buck_voltage_lock) |
280 | return -EINVAL; |
281 | |
282 | /* no predefine regulator found */ |
283 | max8998->buck1_idx = (buck1_last_val % 2) + 2; |
284 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n" , |
285 | max8998->buck1_idx); |
286 | max8998->buck1_vol[max8998->buck1_idx] = selector; |
287 | ret = max8998_get_voltage_register(rdev, reg: ®, |
288 | shift: &shift, |
289 | mask: &mask); |
290 | ret = max8998_write_reg(i2c, reg, value: selector); |
291 | buck1_gpio_set(gpio1: max8998->buck1_gpio1, |
292 | gpio2: max8998->buck1_gpio2, v: max8998->buck1_idx); |
293 | buck1_last_val++; |
294 | buck1_exit: |
295 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n" , |
296 | i2c->name, gpiod_get_value(max8998->buck1_gpio1), |
297 | gpiod_get_value(max8998->buck1_gpio2)); |
298 | break; |
299 | } else { |
300 | ret = max8998_write_reg(i2c, reg, value: selector); |
301 | } |
302 | break; |
303 | |
304 | case MAX8998_BUCK2: |
305 | dev_dbg(max8998->dev, |
306 | "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n" , |
307 | selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); |
308 | if (max8998->buck2_gpio) { |
309 | /* check if requested voltage */ |
310 | /* value is already defined */ |
311 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { |
312 | if (max8998->buck2_vol[j] == selector) { |
313 | max8998->buck2_idx = j; |
314 | buck2_gpio_set(gpio: max8998->buck2_gpio, v: j); |
315 | goto buck2_exit; |
316 | } |
317 | } |
318 | |
319 | if (pdata->buck_voltage_lock) |
320 | return -EINVAL; |
321 | |
322 | max8998_get_voltage_register(rdev, |
323 | reg: ®, shift: &shift, mask: &mask); |
324 | ret = max8998_write_reg(i2c, reg, value: selector); |
325 | max8998->buck2_vol[max8998->buck2_idx] = selector; |
326 | buck2_gpio_set(gpio: max8998->buck2_gpio, v: max8998->buck2_idx); |
327 | buck2_exit: |
328 | dev_dbg(max8998->dev, "%s: SET3:%d\n" , i2c->name, |
329 | gpiod_get_value(max8998->buck2_gpio)); |
330 | } else { |
331 | ret = max8998_write_reg(i2c, reg, value: selector); |
332 | } |
333 | break; |
334 | |
335 | case MAX8998_BUCK3: |
336 | case MAX8998_BUCK4: |
337 | ret = max8998_update_reg(i2c, reg, val: selector<<shift, |
338 | mask: mask<<shift); |
339 | break; |
340 | } |
341 | |
342 | return ret; |
343 | } |
344 | |
345 | static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
346 | unsigned int old_selector, |
347 | unsigned int new_selector) |
348 | { |
349 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
350 | struct i2c_client *i2c = max8998->iodev->i2c; |
351 | int buck = rdev_get_id(rdev); |
352 | u8 val = 0; |
353 | int difference, ret; |
354 | |
355 | if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) |
356 | return -EINVAL; |
357 | |
358 | /* Voltage stabilization */ |
359 | ret = max8998_read_reg(i2c, reg: MAX8998_REG_ONOFF4, dest: &val); |
360 | if (ret) |
361 | return ret; |
362 | |
363 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ |
364 | /* MAX8998 has ENRAMP bit implemented, so test it*/ |
365 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) |
366 | return 0; |
367 | |
368 | difference = (new_selector - old_selector) * rdev->desc->uV_step / 1000; |
369 | if (difference > 0) |
370 | return DIV_ROUND_UP(difference, (val & 0x0f) + 1); |
371 | |
372 | return 0; |
373 | } |
374 | |
375 | static int max8998_set_current_limit(struct regulator_dev *rdev, |
376 | int min_uA, int max_uA) |
377 | { |
378 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
379 | struct i2c_client *i2c = max8998->iodev->i2c; |
380 | unsigned int n_currents = rdev->desc->n_current_limits; |
381 | int i, sel = -1; |
382 | |
383 | if (n_currents == 0) |
384 | return -EINVAL; |
385 | |
386 | if (rdev->desc->curr_table) { |
387 | const unsigned int *curr_table = rdev->desc->curr_table; |
388 | bool ascend = curr_table[n_currents - 1] > curr_table[0]; |
389 | |
390 | /* search for closest to maximum */ |
391 | if (ascend) { |
392 | for (i = n_currents - 1; i >= 0; i--) { |
393 | if (min_uA <= curr_table[i] && |
394 | curr_table[i] <= max_uA) { |
395 | sel = i; |
396 | break; |
397 | } |
398 | } |
399 | } else { |
400 | for (i = 0; i < n_currents; i++) { |
401 | if (min_uA <= curr_table[i] && |
402 | curr_table[i] <= max_uA) { |
403 | sel = i; |
404 | break; |
405 | } |
406 | } |
407 | } |
408 | } |
409 | |
410 | if (sel < 0) |
411 | return -EINVAL; |
412 | |
413 | sel <<= ffs(rdev->desc->csel_mask) - 1; |
414 | |
415 | return max8998_update_reg(i2c, reg: rdev->desc->csel_reg, |
416 | val: sel, mask: rdev->desc->csel_mask); |
417 | } |
418 | |
419 | static int max8998_get_current_limit(struct regulator_dev *rdev) |
420 | { |
421 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
422 | struct i2c_client *i2c = max8998->iodev->i2c; |
423 | u8 val; |
424 | int ret; |
425 | |
426 | ret = max8998_read_reg(i2c, reg: rdev->desc->csel_reg, dest: &val); |
427 | if (ret != 0) |
428 | return ret; |
429 | |
430 | val &= rdev->desc->csel_mask; |
431 | val >>= ffs(rdev->desc->csel_mask) - 1; |
432 | |
433 | if (rdev->desc->curr_table) { |
434 | if (val >= rdev->desc->n_current_limits) |
435 | return -EINVAL; |
436 | |
437 | return rdev->desc->curr_table[val]; |
438 | } |
439 | |
440 | return -EINVAL; |
441 | } |
442 | |
443 | static const struct regulator_ops max8998_ldo_ops = { |
444 | .list_voltage = regulator_list_voltage_linear, |
445 | .map_voltage = regulator_map_voltage_linear, |
446 | .is_enabled = max8998_ldo_is_enabled, |
447 | .enable = max8998_ldo_enable, |
448 | .disable = max8998_ldo_disable, |
449 | .get_voltage_sel = max8998_get_voltage_sel, |
450 | .set_voltage_sel = max8998_set_voltage_ldo_sel, |
451 | }; |
452 | |
453 | static const struct regulator_ops max8998_buck_ops = { |
454 | .list_voltage = regulator_list_voltage_linear, |
455 | .map_voltage = regulator_map_voltage_linear, |
456 | .is_enabled = max8998_ldo_is_enabled, |
457 | .enable = max8998_ldo_enable, |
458 | .disable = max8998_ldo_disable, |
459 | .get_voltage_sel = max8998_get_voltage_sel, |
460 | .set_voltage_sel = max8998_set_voltage_buck_sel, |
461 | .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, |
462 | }; |
463 | |
464 | static const struct regulator_ops max8998_charger_ops = { |
465 | .set_current_limit = max8998_set_current_limit, |
466 | .get_current_limit = max8998_get_current_limit, |
467 | .is_enabled = max8998_ldo_is_enabled_inverted, |
468 | /* Swapped as register is inverted */ |
469 | .enable = max8998_ldo_disable, |
470 | .disable = max8998_ldo_enable, |
471 | }; |
472 | |
473 | static const struct regulator_ops max8998_others_ops = { |
474 | .is_enabled = max8998_ldo_is_enabled, |
475 | .enable = max8998_ldo_enable, |
476 | .disable = max8998_ldo_disable, |
477 | }; |
478 | |
479 | #define MAX8998_LINEAR_REG(_name, _ops, _min, _step, _max) \ |
480 | { \ |
481 | .name = #_name, \ |
482 | .id = MAX8998_##_name, \ |
483 | .ops = _ops, \ |
484 | .min_uV = (_min), \ |
485 | .uV_step = (_step), \ |
486 | .n_voltages = ((_max) - (_min)) / (_step) + 1, \ |
487 | .type = REGULATOR_VOLTAGE, \ |
488 | .owner = THIS_MODULE, \ |
489 | } |
490 | |
491 | #define MAX8998_CURRENT_REG(_name, _ops, _table, _reg, _mask) \ |
492 | { \ |
493 | .name = #_name, \ |
494 | .id = MAX8998_##_name, \ |
495 | .ops = _ops, \ |
496 | .curr_table = _table, \ |
497 | .n_current_limits = ARRAY_SIZE(_table), \ |
498 | .csel_reg = _reg, \ |
499 | .csel_mask = _mask, \ |
500 | .type = REGULATOR_CURRENT, \ |
501 | .owner = THIS_MODULE, \ |
502 | } |
503 | |
504 | #define MAX8998_OTHERS_REG(_name, _id) \ |
505 | { \ |
506 | .name = #_name, \ |
507 | .id = _id, \ |
508 | .ops = &max8998_others_ops, \ |
509 | .type = REGULATOR_VOLTAGE, \ |
510 | .owner = THIS_MODULE, \ |
511 | } |
512 | |
513 | static const struct regulator_desc regulators[] = { |
514 | MAX8998_LINEAR_REG(LDO2, &max8998_ldo_ops, 800000, 50000, 1300000), |
515 | MAX8998_LINEAR_REG(LDO3, &max8998_ldo_ops, 800000, 50000, 1300000), |
516 | MAX8998_LINEAR_REG(LDO4, &max8998_ldo_ops, 1600000, 100000, 3600000), |
517 | MAX8998_LINEAR_REG(LDO5, &max8998_ldo_ops, 1600000, 100000, 3600000), |
518 | MAX8998_LINEAR_REG(LDO6, &max8998_ldo_ops, 1600000, 100000, 3600000), |
519 | MAX8998_LINEAR_REG(LDO7, &max8998_ldo_ops, 1600000, 100000, 3600000), |
520 | MAX8998_LINEAR_REG(LDO8, &max8998_ldo_ops, 3000000, 100000, 3600000), |
521 | MAX8998_LINEAR_REG(LDO9, &max8998_ldo_ops, 2800000, 100000, 3100000), |
522 | MAX8998_LINEAR_REG(LDO10, &max8998_ldo_ops, 950000, 50000, 1300000), |
523 | MAX8998_LINEAR_REG(LDO11, &max8998_ldo_ops, 1600000, 100000, 3600000), |
524 | MAX8998_LINEAR_REG(LDO12, &max8998_ldo_ops, 800000, 100000, 3300000), |
525 | MAX8998_LINEAR_REG(LDO13, &max8998_ldo_ops, 800000, 100000, 3300000), |
526 | MAX8998_LINEAR_REG(LDO14, &max8998_ldo_ops, 1200000, 100000, 3300000), |
527 | MAX8998_LINEAR_REG(LDO15, &max8998_ldo_ops, 1200000, 100000, 3300000), |
528 | MAX8998_LINEAR_REG(LDO16, &max8998_ldo_ops, 1600000, 100000, 3600000), |
529 | MAX8998_LINEAR_REG(LDO17, &max8998_ldo_ops, 1600000, 100000, 3600000), |
530 | MAX8998_LINEAR_REG(BUCK1, &max8998_buck_ops, 750000, 25000, 1525000), |
531 | MAX8998_LINEAR_REG(BUCK2, &max8998_buck_ops, 750000, 25000, 1525000), |
532 | MAX8998_LINEAR_REG(BUCK3, &max8998_buck_ops, 1600000, 100000, 3600000), |
533 | MAX8998_LINEAR_REG(BUCK4, &max8998_buck_ops, 800000, 100000, 2300000), |
534 | MAX8998_OTHERS_REG(EN32KHz-AP, MAX8998_EN32KHZ_AP), |
535 | MAX8998_OTHERS_REG(EN32KHz-CP, MAX8998_EN32KHZ_CP), |
536 | MAX8998_OTHERS_REG(ENVICHG, MAX8998_ENVICHG), |
537 | MAX8998_OTHERS_REG(ESAFEOUT1, MAX8998_ESAFEOUT1), |
538 | MAX8998_OTHERS_REG(ESAFEOUT2, MAX8998_ESAFEOUT2), |
539 | MAX8998_CURRENT_REG(CHARGER, &max8998_charger_ops, |
540 | charger_current_table, MAX8998_REG_CHGR1, 0x7), |
541 | }; |
542 | |
543 | static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, |
544 | struct max8998_platform_data *pdata) |
545 | { |
546 | struct device_node *pmic_np = iodev->dev->of_node; |
547 | struct device_node *regulators_np, *reg_np; |
548 | struct max8998_regulator_data *rdata; |
549 | unsigned int i; |
550 | int ret; |
551 | |
552 | regulators_np = of_get_child_by_name(node: pmic_np, name: "regulators" ); |
553 | if (!regulators_np) { |
554 | dev_err(iodev->dev, "could not find regulators sub-node\n" ); |
555 | return -EINVAL; |
556 | } |
557 | |
558 | /* count the number of regulators to be supported in pmic */ |
559 | pdata->num_regulators = of_get_child_count(np: regulators_np); |
560 | |
561 | rdata = devm_kcalloc(dev: iodev->dev, |
562 | n: pdata->num_regulators, size: sizeof(*rdata), |
563 | GFP_KERNEL); |
564 | if (!rdata) { |
565 | of_node_put(node: regulators_np); |
566 | return -ENOMEM; |
567 | } |
568 | |
569 | pdata->regulators = rdata; |
570 | for (i = 0; i < ARRAY_SIZE(regulators); ++i) { |
571 | reg_np = of_get_child_by_name(node: regulators_np, |
572 | name: regulators[i].name); |
573 | if (!reg_np) |
574 | continue; |
575 | |
576 | rdata->id = regulators[i].id; |
577 | rdata->initdata = of_get_regulator_init_data(dev: iodev->dev, |
578 | node: reg_np, |
579 | desc: ®ulators[i]); |
580 | rdata->reg_node = reg_np; |
581 | ++rdata; |
582 | } |
583 | pdata->num_regulators = rdata - pdata->regulators; |
584 | |
585 | of_node_put(node: reg_np); |
586 | of_node_put(node: regulators_np); |
587 | |
588 | pdata->buck_voltage_lock = of_property_read_bool(np: pmic_np, propname: "max8998,pmic-buck-voltage-lock" ); |
589 | |
590 | ret = of_property_read_u32(np: pmic_np, |
591 | propname: "max8998,pmic-buck1-default-dvs-idx" , |
592 | out_value: &pdata->buck1_default_idx); |
593 | if (!ret && pdata->buck1_default_idx >= 4) { |
594 | pdata->buck1_default_idx = 0; |
595 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n" ); |
596 | } |
597 | |
598 | ret = of_property_read_u32(np: pmic_np, |
599 | propname: "max8998,pmic-buck2-default-dvs-idx" , |
600 | out_value: &pdata->buck2_default_idx); |
601 | if (!ret && pdata->buck2_default_idx >= 2) { |
602 | pdata->buck2_default_idx = 0; |
603 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n" ); |
604 | } |
605 | |
606 | ret = of_property_read_u32_array(np: pmic_np, |
607 | propname: "max8998,pmic-buck1-dvs-voltage" , |
608 | out_values: pdata->buck1_voltage, |
609 | ARRAY_SIZE(pdata->buck1_voltage)); |
610 | if (ret) { |
611 | dev_err(iodev->dev, "buck1 voltages not specified\n" ); |
612 | return -EINVAL; |
613 | } |
614 | |
615 | ret = of_property_read_u32_array(np: pmic_np, |
616 | propname: "max8998,pmic-buck2-dvs-voltage" , |
617 | out_values: pdata->buck2_voltage, |
618 | ARRAY_SIZE(pdata->buck2_voltage)); |
619 | if (ret) { |
620 | dev_err(iodev->dev, "buck2 voltages not specified\n" ); |
621 | return -EINVAL; |
622 | } |
623 | |
624 | return 0; |
625 | } |
626 | |
627 | static int max8998_pmic_probe(struct platform_device *pdev) |
628 | { |
629 | struct max8998_dev *iodev = dev_get_drvdata(dev: pdev->dev.parent); |
630 | struct max8998_platform_data *pdata = iodev->pdata; |
631 | struct regulator_config config = { }; |
632 | struct regulator_dev *rdev; |
633 | struct max8998_data *max8998; |
634 | struct i2c_client *i2c; |
635 | enum gpiod_flags flags; |
636 | int i, ret; |
637 | unsigned int v; |
638 | |
639 | if (!pdata) { |
640 | dev_err(pdev->dev.parent, "No platform init data supplied\n" ); |
641 | return -ENODEV; |
642 | } |
643 | |
644 | if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) { |
645 | ret = max8998_pmic_dt_parse_pdata(iodev, pdata); |
646 | if (ret) |
647 | return ret; |
648 | } |
649 | |
650 | max8998 = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct max8998_data), |
651 | GFP_KERNEL); |
652 | if (!max8998) |
653 | return -ENOMEM; |
654 | |
655 | max8998->dev = &pdev->dev; |
656 | max8998->iodev = iodev; |
657 | max8998->num_regulators = pdata->num_regulators; |
658 | platform_set_drvdata(pdev, data: max8998); |
659 | i2c = max8998->iodev->i2c; |
660 | |
661 | max8998->buck1_idx = pdata->buck1_default_idx; |
662 | max8998->buck2_idx = pdata->buck2_default_idx; |
663 | |
664 | /* Check if MAX8998 voltage selection GPIOs are defined */ |
665 | flags = (max8998->buck1_idx & BIT(0)) ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
666 | max8998->buck1_gpio1 = devm_gpiod_get_index_optional(dev: iodev->dev, |
667 | con_id: "max8998,pmic-buck1-dvs" , |
668 | index: 0, |
669 | flags); |
670 | if (IS_ERR(ptr: max8998->buck1_gpio1)) |
671 | return dev_err_probe(dev: &pdev->dev, err: PTR_ERR(ptr: max8998->buck1_gpio1), |
672 | fmt: "could not get BUCK1 GPIO1\n" ); |
673 | gpiod_set_consumer_name(desc: max8998->buck1_gpio1, name: "MAX8998 BUCK1_SET1" ); |
674 | |
675 | flags = (max8998->buck1_idx & BIT(1)) ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
676 | max8998->buck1_gpio2 = devm_gpiod_get_index_optional(dev: iodev->dev, |
677 | con_id: "max8998,pmic-buck1-dvs" , |
678 | index: 1, |
679 | flags); |
680 | if (IS_ERR(ptr: max8998->buck1_gpio2)) |
681 | return dev_err_probe(dev: &pdev->dev, err: PTR_ERR(ptr: max8998->buck1_gpio2), |
682 | fmt: "could not get BUCK1 GPIO2\n" ); |
683 | gpiod_set_consumer_name(desc: max8998->buck1_gpio1, name: "MAX8998 BUCK1_SET2" ); |
684 | |
685 | flags = (max8998->buck2_idx & BIT(0)) ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
686 | max8998->buck2_gpio = devm_gpiod_get_index_optional(dev: iodev->dev, |
687 | con_id: "max8998,pmic-buck2-dvs" , |
688 | index: 0, |
689 | flags); |
690 | if (IS_ERR(ptr: max8998->buck2_gpio)) |
691 | return dev_err_probe(dev: &pdev->dev, err: PTR_ERR(ptr: max8998->buck2_gpio), |
692 | fmt: "could not get BUCK2 GPIO\n" ); |
693 | gpiod_set_consumer_name(desc: max8998->buck1_gpio1, name: "MAX8998 BUCK2_SET3" ); |
694 | |
695 | if (max8998->buck1_gpio1 && max8998->buck1_gpio2) { |
696 | /* Set predefined values for BUCK1 registers */ |
697 | for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) { |
698 | int index = MAX8998_BUCK1 - MAX8998_LDO2; |
699 | |
700 | i = 0; |
701 | while (regulators[index].min_uV + |
702 | regulators[index].uV_step * i |
703 | < pdata->buck1_voltage[v]) |
704 | i++; |
705 | |
706 | max8998->buck1_vol[v] = i; |
707 | ret = max8998_write_reg(i2c, |
708 | reg: MAX8998_REG_BUCK1_VOLTAGE1 + v, value: i); |
709 | if (ret) |
710 | return ret; |
711 | } |
712 | } |
713 | |
714 | if (max8998->buck2_gpio) { |
715 | /* Set predefined values for BUCK2 registers */ |
716 | for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) { |
717 | int index = MAX8998_BUCK2 - MAX8998_LDO2; |
718 | |
719 | i = 0; |
720 | while (regulators[index].min_uV + |
721 | regulators[index].uV_step * i |
722 | < pdata->buck2_voltage[v]) |
723 | i++; |
724 | |
725 | max8998->buck2_vol[v] = i; |
726 | ret = max8998_write_reg(i2c, |
727 | reg: MAX8998_REG_BUCK2_VOLTAGE1 + v, value: i); |
728 | if (ret) |
729 | return ret; |
730 | } |
731 | } |
732 | |
733 | for (i = 0; i < pdata->num_regulators; i++) { |
734 | int index = pdata->regulators[i].id - MAX8998_LDO2; |
735 | |
736 | config.dev = max8998->dev; |
737 | config.of_node = pdata->regulators[i].reg_node; |
738 | config.init_data = pdata->regulators[i].initdata; |
739 | config.driver_data = max8998; |
740 | |
741 | rdev = devm_regulator_register(dev: &pdev->dev, regulator_desc: ®ulators[index], |
742 | config: &config); |
743 | if (IS_ERR(ptr: rdev)) { |
744 | ret = PTR_ERR(ptr: rdev); |
745 | dev_err(max8998->dev, "regulator %s init failed (%d)\n" , |
746 | regulators[index].name, ret); |
747 | return ret; |
748 | } |
749 | } |
750 | |
751 | return 0; |
752 | } |
753 | |
754 | static const struct platform_device_id max8998_pmic_id[] = { |
755 | { "max8998-pmic" , TYPE_MAX8998 }, |
756 | { "lp3974-pmic" , TYPE_LP3974 }, |
757 | { } |
758 | }; |
759 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
760 | |
761 | static struct platform_driver max8998_pmic_driver = { |
762 | .driver = { |
763 | .name = "max8998-pmic" , |
764 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
765 | }, |
766 | .probe = max8998_pmic_probe, |
767 | .id_table = max8998_pmic_id, |
768 | }; |
769 | |
770 | static int __init max8998_pmic_init(void) |
771 | { |
772 | return platform_driver_register(&max8998_pmic_driver); |
773 | } |
774 | subsys_initcall(max8998_pmic_init); |
775 | |
776 | static void __exit max8998_pmic_cleanup(void) |
777 | { |
778 | platform_driver_unregister(&max8998_pmic_driver); |
779 | } |
780 | module_exit(max8998_pmic_cleanup); |
781 | |
782 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver" ); |
783 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>" ); |
784 | MODULE_LICENSE("GPL" ); |
785 | |