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5e9384c7 KK |
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> | |
156f2528 KP |
8 | |
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/i2c.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/gpio.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/mutex.h> | |
ee999fb3 TF |
17 | #include <linux/of.h> |
18 | #include <linux/of_gpio.h> | |
156f2528 KP |
19 | #include <linux/platform_device.h> |
20 | #include <linux/regulator/driver.h> | |
ee999fb3 | 21 | #include <linux/regulator/of_regulator.h> |
156f2528 KP |
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; | |
889cd5a6 LM |
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; | |
156f2528 KP |
34 | }; |
35 | ||
4ffea5e0 JB |
36 | static const unsigned int charger_current_table[] = { |
37 | 90000, 380000, 475000, 550000, 570000, 600000, 700000, 800000, | |
38 | }; | |
39 | ||
156f2528 KP |
40 | static int max8998_get_enable_register(struct regulator_dev *rdev, |
41 | int *reg, int *shift) | |
42 | { | |
7b94791b | 43 | int ldo = rdev_get_id(rdev); |
156f2528 KP |
44 | |
45 | switch (ldo) { | |
46 | case MAX8998_LDO2 ... MAX8998_LDO5: | |
47 | *reg = MAX8998_REG_ONOFF1; | |
48 | *shift = 3 - (ldo - MAX8998_LDO2); | |
49 | break; | |
50 | case MAX8998_LDO6 ... MAX8998_LDO13: | |
51 | *reg = MAX8998_REG_ONOFF2; | |
52 | *shift = 7 - (ldo - MAX8998_LDO6); | |
53 | break; | |
54 | case MAX8998_LDO14 ... MAX8998_LDO17: | |
55 | *reg = MAX8998_REG_ONOFF3; | |
56 | *shift = 7 - (ldo - MAX8998_LDO14); | |
57 | break; | |
58 | case MAX8998_BUCK1 ... MAX8998_BUCK4: | |
59 | *reg = MAX8998_REG_ONOFF1; | |
60 | *shift = 7 - (ldo - MAX8998_BUCK1); | |
61 | break; | |
62 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: | |
63 | *reg = MAX8998_REG_ONOFF4; | |
64 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); | |
65 | break; | |
66 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: | |
67 | *reg = MAX8998_REG_CHGR2; | |
68 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); | |
69 | break; | |
4ffea5e0 JB |
70 | case MAX8998_CHARGER: |
71 | *reg = MAX8998_REG_CHGR2; | |
72 | *shift = 0; | |
73 | break; | |
156f2528 KP |
74 | default: |
75 | return -EINVAL; | |
76 | } | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) | |
82 | { | |
83 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 84 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
85 | int ret, reg, shift = 8; |
86 | u8 val; | |
87 | ||
88 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
89 | if (ret) | |
90 | return ret; | |
91 | ||
676e02d7 | 92 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
93 | if (ret) |
94 | return ret; | |
95 | ||
96 | return val & (1 << shift); | |
97 | } | |
98 | ||
4ffea5e0 JB |
99 | static int max8998_ldo_is_enabled_inverted(struct regulator_dev *rdev) |
100 | { | |
101 | return (!max8998_ldo_is_enabled(rdev)); | |
102 | } | |
103 | ||
156f2528 KP |
104 | static int max8998_ldo_enable(struct regulator_dev *rdev) |
105 | { | |
106 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 107 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
108 | int reg, shift = 8, ret; |
109 | ||
110 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
111 | if (ret) | |
112 | return ret; | |
113 | ||
676e02d7 | 114 | return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
156f2528 KP |
115 | } |
116 | ||
117 | static int max8998_ldo_disable(struct regulator_dev *rdev) | |
118 | { | |
119 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 120 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
121 | int reg, shift = 8, ret; |
122 | ||
123 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
124 | if (ret) | |
125 | return ret; | |
126 | ||
676e02d7 | 127 | return max8998_update_reg(i2c, reg, 0, 1<<shift); |
156f2528 KP |
128 | } |
129 | ||
130 | static int max8998_get_voltage_register(struct regulator_dev *rdev, | |
131 | int *_reg, int *_shift, int *_mask) | |
132 | { | |
7b94791b | 133 | int ldo = rdev_get_id(rdev); |
889cd5a6 | 134 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
156f2528 KP |
135 | int reg, shift = 0, mask = 0xff; |
136 | ||
137 | switch (ldo) { | |
138 | case MAX8998_LDO2 ... MAX8998_LDO3: | |
139 | reg = MAX8998_REG_LDO2_LDO3; | |
140 | mask = 0xf; | |
141 | if (ldo == MAX8998_LDO2) | |
142 | shift = 4; | |
143 | else | |
144 | shift = 0; | |
145 | break; | |
146 | case MAX8998_LDO4 ... MAX8998_LDO7: | |
147 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); | |
148 | break; | |
149 | case MAX8998_LDO8 ... MAX8998_LDO9: | |
150 | reg = MAX8998_REG_LDO8_LDO9; | |
151 | mask = 0xf; | |
152 | if (ldo == MAX8998_LDO8) | |
153 | shift = 4; | |
154 | else | |
155 | shift = 0; | |
156 | break; | |
157 | case MAX8998_LDO10 ... MAX8998_LDO11: | |
158 | reg = MAX8998_REG_LDO10_LDO11; | |
159 | if (ldo == MAX8998_LDO10) { | |
160 | shift = 5; | |
161 | mask = 0x7; | |
162 | } else { | |
163 | shift = 0; | |
164 | mask = 0x1f; | |
165 | } | |
166 | break; | |
167 | case MAX8998_LDO12 ... MAX8998_LDO17: | |
168 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); | |
169 | break; | |
170 | case MAX8998_BUCK1: | |
889cd5a6 | 171 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
156f2528 KP |
172 | break; |
173 | case MAX8998_BUCK2: | |
889cd5a6 | 174 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
156f2528 KP |
175 | break; |
176 | case MAX8998_BUCK3: | |
177 | reg = MAX8998_REG_BUCK3; | |
178 | break; | |
179 | case MAX8998_BUCK4: | |
180 | reg = MAX8998_REG_BUCK4; | |
181 | break; | |
182 | default: | |
183 | return -EINVAL; | |
184 | } | |
185 | ||
186 | *_reg = reg; | |
187 | *_shift = shift; | |
188 | *_mask = mask; | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
7b4354b4 | 193 | static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
156f2528 KP |
194 | { |
195 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 196 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
197 | int reg, shift = 0, mask, ret; |
198 | u8 val; | |
199 | ||
200 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); | |
201 | if (ret) | |
202 | return ret; | |
203 | ||
676e02d7 | 204 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
205 | if (ret) |
206 | return ret; | |
207 | ||
208 | val >>= shift; | |
209 | val &= mask; | |
210 | ||
7b4354b4 | 211 | return val; |
156f2528 KP |
212 | } |
213 | ||
baae019e AL |
214 | static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, |
215 | unsigned selector) | |
9d92492f LM |
216 | { |
217 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
218 | struct i2c_client *i2c = max8998->iodev->i2c; | |
baae019e | 219 | int reg, shift = 0, mask, ret; |
3a93f2a9 | 220 | |
9d92492f LM |
221 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
222 | if (ret) | |
223 | return ret; | |
224 | ||
baae019e | 225 | ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); |
9d92492f LM |
226 | |
227 | return ret; | |
228 | } | |
229 | ||
50f19a45 LM |
230 | static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
231 | { | |
232 | gpio_set_value(gpio1, v & 0x1); | |
233 | gpio_set_value(gpio2, (v >> 1) & 0x1); | |
234 | } | |
235 | ||
236 | static inline void buck2_gpio_set(int gpio, int v) | |
237 | { | |
238 | gpio_set_value(gpio, v & 0x1); | |
239 | } | |
240 | ||
baae019e AL |
241 | static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, |
242 | unsigned selector) | |
156f2528 KP |
243 | { |
244 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
c1472737 | 245 | struct max8998_platform_data *pdata = max8998->iodev->pdata; |
676e02d7 | 246 | struct i2c_client *i2c = max8998->iodev->i2c; |
7b94791b | 247 | int buck = rdev_get_id(rdev); |
c6163a70 | 248 | int reg, shift = 0, mask, ret, j; |
50f19a45 | 249 | static u8 buck1_last_val; |
156f2528 | 250 | |
156f2528 KP |
251 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
252 | if (ret) | |
253 | return ret; | |
254 | ||
50f19a45 LM |
255 | switch (buck) { |
256 | case MAX8998_BUCK1: | |
257 | dev_dbg(max8998->dev, | |
baae019e | 258 | "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
85ee7a1d | 259 | "buck1_vol3:%d, buck1_vol4:%d\n", |
baae019e | 260 | selector, max8998->buck1_vol[0], max8998->buck1_vol[1], |
50f19a45 LM |
261 | max8998->buck1_vol[2], max8998->buck1_vol[3]); |
262 | ||
263 | if (gpio_is_valid(pdata->buck1_set1) && | |
264 | gpio_is_valid(pdata->buck1_set2)) { | |
265 | ||
266 | /* check if requested voltage */ | |
267 | /* value is already defined */ | |
268 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { | |
baae019e | 269 | if (max8998->buck1_vol[j] == selector) { |
50f19a45 LM |
270 | max8998->buck1_idx = j; |
271 | buck1_gpio_set(pdata->buck1_set1, | |
272 | pdata->buck1_set2, j); | |
273 | goto buck1_exit; | |
274 | } | |
275 | } | |
276 | ||
735a3d9e MH |
277 | if (pdata->buck_voltage_lock) |
278 | return -EINVAL; | |
279 | ||
50f19a45 LM |
280 | /* no predefine regulator found */ |
281 | max8998->buck1_idx = (buck1_last_val % 2) + 2; | |
282 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", | |
283 | max8998->buck1_idx); | |
baae019e | 284 | max8998->buck1_vol[max8998->buck1_idx] = selector; |
50f19a45 LM |
285 | ret = max8998_get_voltage_register(rdev, ®, |
286 | &shift, | |
287 | &mask); | |
baae019e | 288 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
289 | buck1_gpio_set(pdata->buck1_set1, |
290 | pdata->buck1_set2, max8998->buck1_idx); | |
291 | buck1_last_val++; | |
292 | buck1_exit: | |
293 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", | |
294 | i2c->name, gpio_get_value(pdata->buck1_set1), | |
295 | gpio_get_value(pdata->buck1_set2)); | |
296 | break; | |
297 | } else { | |
baae019e | 298 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
299 | } |
300 | break; | |
c5a4655d | 301 | |
50f19a45 LM |
302 | case MAX8998_BUCK2: |
303 | dev_dbg(max8998->dev, | |
baae019e AL |
304 | "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", |
305 | selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); | |
50f19a45 | 306 | if (gpio_is_valid(pdata->buck2_set3)) { |
735a3d9e MH |
307 | |
308 | /* check if requested voltage */ | |
309 | /* value is already defined */ | |
310 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { | |
baae019e | 311 | if (max8998->buck2_vol[j] == selector) { |
735a3d9e MH |
312 | max8998->buck2_idx = j; |
313 | buck2_gpio_set(pdata->buck2_set3, j); | |
314 | goto buck2_exit; | |
315 | } | |
50f19a45 | 316 | } |
735a3d9e MH |
317 | |
318 | if (pdata->buck_voltage_lock) | |
319 | return -EINVAL; | |
320 | ||
321 | max8998_get_voltage_register(rdev, | |
322 | ®, &shift, &mask); | |
baae019e AL |
323 | ret = max8998_write_reg(i2c, reg, selector); |
324 | max8998->buck2_vol[max8998->buck2_idx] = selector; | |
735a3d9e MH |
325 | buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); |
326 | buck2_exit: | |
50f19a45 LM |
327 | dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
328 | gpio_get_value(pdata->buck2_set3)); | |
329 | } else { | |
baae019e | 330 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
331 | } |
332 | break; | |
333 | ||
334 | case MAX8998_BUCK3: | |
335 | case MAX8998_BUCK4: | |
baae019e AL |
336 | ret = max8998_update_reg(i2c, reg, selector<<shift, |
337 | mask<<shift); | |
50f19a45 | 338 | break; |
c5a4655d MH |
339 | } |
340 | ||
276909d3 AL |
341 | return ret; |
342 | } | |
343 | ||
344 | static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, | |
345 | unsigned int old_selector, | |
346 | unsigned int new_selector) | |
347 | { | |
348 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
349 | struct i2c_client *i2c = max8998->iodev->i2c; | |
276909d3 AL |
350 | int buck = rdev_get_id(rdev); |
351 | u8 val = 0; | |
352 | int difference, ret; | |
353 | ||
354 | if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) | |
355 | return -EINVAL; | |
356 | ||
50f19a45 | 357 | /* Voltage stabilization */ |
276909d3 AL |
358 | ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); |
359 | if (ret) | |
360 | return ret; | |
50f19a45 LM |
361 | |
362 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ | |
363 | /* MAX8998 has ENRAMP bit implemented, so test it*/ | |
364 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) | |
276909d3 | 365 | return 0; |
50f19a45 | 366 | |
0dceab33 | 367 | difference = (new_selector - old_selector) * rdev->desc->uV_step / 1000; |
50f19a45 | 368 | if (difference > 0) |
81d0a6ae | 369 | return DIV_ROUND_UP(difference, (val & 0x0f) + 1); |
50f19a45 | 370 | |
276909d3 | 371 | return 0; |
156f2528 KP |
372 | } |
373 | ||
0b0c0bd8 | 374 | static int max8998_set_current_limit(struct regulator_dev *rdev, |
375 | int min_uA, int max_uA) | |
4ffea5e0 JB |
376 | { |
377 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
378 | struct i2c_client *i2c = max8998->iodev->i2c; | |
379 | unsigned int n_currents = rdev->desc->n_current_limits; | |
380 | int i, sel = -1; | |
381 | ||
382 | if (n_currents == 0) | |
383 | return -EINVAL; | |
384 | ||
385 | if (rdev->desc->curr_table) { | |
386 | const unsigned int *curr_table = rdev->desc->curr_table; | |
387 | bool ascend = curr_table[n_currents - 1] > curr_table[0]; | |
388 | ||
389 | /* search for closest to maximum */ | |
390 | if (ascend) { | |
391 | for (i = n_currents - 1; i >= 0; i--) { | |
392 | if (min_uA <= curr_table[i] && | |
393 | curr_table[i] <= max_uA) { | |
394 | sel = i; | |
395 | break; | |
396 | } | |
397 | } | |
398 | } else { | |
399 | for (i = 0; i < n_currents; i++) { | |
400 | if (min_uA <= curr_table[i] && | |
401 | curr_table[i] <= max_uA) { | |
402 | sel = i; | |
403 | break; | |
404 | } | |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | if (sel < 0) | |
410 | return -EINVAL; | |
411 | ||
412 | sel <<= ffs(rdev->desc->csel_mask) - 1; | |
413 | ||
414 | return max8998_update_reg(i2c, rdev->desc->csel_reg, | |
415 | sel, rdev->desc->csel_mask); | |
416 | } | |
417 | ||
36f69fa9 | 418 | static int max8998_get_current_limit(struct regulator_dev *rdev) |
4ffea5e0 JB |
419 | { |
420 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
421 | struct i2c_client *i2c = max8998->iodev->i2c; | |
422 | u8 val; | |
423 | int ret; | |
424 | ||
425 | ret = max8998_read_reg(i2c, rdev->desc->csel_reg, &val); | |
426 | if (ret != 0) | |
427 | return ret; | |
428 | ||
429 | val &= rdev->desc->csel_mask; | |
430 | val >>= ffs(rdev->desc->csel_mask) - 1; | |
431 | ||
432 | if (rdev->desc->curr_table) { | |
433 | if (val >= rdev->desc->n_current_limits) | |
434 | return -EINVAL; | |
435 | ||
436 | return rdev->desc->curr_table[val]; | |
437 | } | |
438 | ||
439 | return -EINVAL; | |
440 | } | |
441 | ||
7d695f20 | 442 | static const struct regulator_ops max8998_ldo_ops = { |
9a0fbb62 | 443 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 444 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
445 | .is_enabled = max8998_ldo_is_enabled, |
446 | .enable = max8998_ldo_enable, | |
447 | .disable = max8998_ldo_disable, | |
7b4354b4 | 448 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 449 | .set_voltage_sel = max8998_set_voltage_ldo_sel, |
156f2528 KP |
450 | }; |
451 | ||
7d695f20 | 452 | static const struct regulator_ops max8998_buck_ops = { |
9a0fbb62 | 453 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 454 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
455 | .is_enabled = max8998_ldo_is_enabled, |
456 | .enable = max8998_ldo_enable, | |
457 | .disable = max8998_ldo_disable, | |
7b4354b4 | 458 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 459 | .set_voltage_sel = max8998_set_voltage_buck_sel, |
276909d3 | 460 | .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, |
156f2528 KP |
461 | }; |
462 | ||
4ffea5e0 JB |
463 | static const struct regulator_ops max8998_charger_ops = { |
464 | .set_current_limit = max8998_set_current_limit, | |
465 | .get_current_limit = max8998_get_current_limit, | |
466 | .is_enabled = max8998_ldo_is_enabled_inverted, | |
467 | /* Swapped as register is inverted */ | |
468 | .enable = max8998_ldo_disable, | |
469 | .disable = max8998_ldo_enable, | |
470 | }; | |
471 | ||
7d695f20 | 472 | static const struct regulator_ops max8998_others_ops = { |
156f2528 KP |
473 | .is_enabled = max8998_ldo_is_enabled, |
474 | .enable = max8998_ldo_enable, | |
475 | .disable = max8998_ldo_disable, | |
156f2528 KP |
476 | }; |
477 | ||
0dceab33 AL |
478 | #define MAX8998_LINEAR_REG(_name, _ops, _min, _step, _max) \ |
479 | { \ | |
480 | .name = #_name, \ | |
481 | .id = MAX8998_##_name, \ | |
482 | .ops = _ops, \ | |
483 | .min_uV = (_min), \ | |
484 | .uV_step = (_step), \ | |
485 | .n_voltages = ((_max) - (_min)) / (_step) + 1, \ | |
486 | .type = REGULATOR_VOLTAGE, \ | |
487 | .owner = THIS_MODULE, \ | |
156f2528 | 488 | } |
0dceab33 | 489 | |
4ffea5e0 JB |
490 | #define MAX8998_CURRENT_REG(_name, _ops, _table, _reg, _mask) \ |
491 | { \ | |
492 | .name = #_name, \ | |
493 | .id = MAX8998_##_name, \ | |
494 | .ops = _ops, \ | |
495 | .curr_table = _table, \ | |
496 | .n_current_limits = ARRAY_SIZE(_table), \ | |
497 | .csel_reg = _reg, \ | |
498 | .csel_mask = _mask, \ | |
499 | .type = REGULATOR_CURRENT, \ | |
500 | .owner = THIS_MODULE, \ | |
501 | } | |
502 | ||
0dceab33 AL |
503 | #define MAX8998_OTHERS_REG(_name, _id) \ |
504 | { \ | |
505 | .name = #_name, \ | |
506 | .id = _id, \ | |
507 | .ops = &max8998_others_ops, \ | |
508 | .type = REGULATOR_VOLTAGE, \ | |
509 | .owner = THIS_MODULE, \ | |
510 | } | |
511 | ||
512 | static const struct regulator_desc regulators[] = { | |
513 | MAX8998_LINEAR_REG(LDO2, &max8998_ldo_ops, 800000, 50000, 1300000), | |
514 | MAX8998_LINEAR_REG(LDO3, &max8998_ldo_ops, 800000, 50000, 1300000), | |
515 | MAX8998_LINEAR_REG(LDO4, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
516 | MAX8998_LINEAR_REG(LDO5, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
517 | MAX8998_LINEAR_REG(LDO6, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
518 | MAX8998_LINEAR_REG(LDO7, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
519 | MAX8998_LINEAR_REG(LDO8, &max8998_ldo_ops, 3000000, 100000, 3600000), | |
520 | MAX8998_LINEAR_REG(LDO9, &max8998_ldo_ops, 2800000, 100000, 3100000), | |
521 | MAX8998_LINEAR_REG(LDO10, &max8998_ldo_ops, 950000, 50000, 1300000), | |
522 | MAX8998_LINEAR_REG(LDO11, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
523 | MAX8998_LINEAR_REG(LDO12, &max8998_ldo_ops, 800000, 100000, 3300000), | |
524 | MAX8998_LINEAR_REG(LDO13, &max8998_ldo_ops, 800000, 100000, 3300000), | |
525 | MAX8998_LINEAR_REG(LDO14, &max8998_ldo_ops, 1200000, 100000, 3300000), | |
526 | MAX8998_LINEAR_REG(LDO15, &max8998_ldo_ops, 1200000, 100000, 3300000), | |
527 | MAX8998_LINEAR_REG(LDO16, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
528 | MAX8998_LINEAR_REG(LDO17, &max8998_ldo_ops, 1600000, 100000, 3600000), | |
529 | MAX8998_LINEAR_REG(BUCK1, &max8998_buck_ops, 750000, 25000, 1525000), | |
530 | MAX8998_LINEAR_REG(BUCK2, &max8998_buck_ops, 750000, 25000, 1525000), | |
531 | MAX8998_LINEAR_REG(BUCK3, &max8998_buck_ops, 1600000, 100000, 3600000), | |
532 | MAX8998_LINEAR_REG(BUCK4, &max8998_buck_ops, 800000, 100000, 2300000), | |
533 | MAX8998_OTHERS_REG(EN32KHz-AP, MAX8998_EN32KHZ_AP), | |
534 | MAX8998_OTHERS_REG(EN32KHz-CP, MAX8998_EN32KHZ_CP), | |
535 | MAX8998_OTHERS_REG(ENVICHG, MAX8998_ENVICHG), | |
536 | MAX8998_OTHERS_REG(ESAFEOUT1, MAX8998_ESAFEOUT1), | |
537 | MAX8998_OTHERS_REG(ESAFEOUT2, MAX8998_ESAFEOUT2), | |
4ffea5e0 JB |
538 | MAX8998_CURRENT_REG(CHARGER, &max8998_charger_ops, |
539 | charger_current_table, MAX8998_REG_CHGR1, 0x7), | |
156f2528 KP |
540 | }; |
541 | ||
ee999fb3 TF |
542 | static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, |
543 | struct max8998_platform_data *pdata, | |
544 | struct device_node *pmic_np) | |
545 | { | |
546 | int gpio; | |
547 | ||
548 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0); | |
549 | if (!gpio_is_valid(gpio)) { | |
550 | dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio); | |
551 | return -EINVAL; | |
552 | } | |
553 | pdata->buck1_set1 = gpio; | |
554 | ||
555 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1); | |
556 | if (!gpio_is_valid(gpio)) { | |
557 | dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio); | |
558 | return -EINVAL; | |
559 | } | |
560 | pdata->buck1_set2 = gpio; | |
561 | ||
562 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0); | |
563 | if (!gpio_is_valid(gpio)) { | |
564 | dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio); | |
565 | return -EINVAL; | |
566 | } | |
567 | pdata->buck2_set3 = gpio; | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, | |
573 | struct max8998_platform_data *pdata) | |
574 | { | |
575 | struct device_node *pmic_np = iodev->dev->of_node; | |
576 | struct device_node *regulators_np, *reg_np; | |
577 | struct max8998_regulator_data *rdata; | |
578 | unsigned int i; | |
579 | int ret; | |
580 | ||
581 | regulators_np = of_get_child_by_name(pmic_np, "regulators"); | |
582 | if (!regulators_np) { | |
583 | dev_err(iodev->dev, "could not find regulators sub-node\n"); | |
584 | return -EINVAL; | |
585 | } | |
586 | ||
587 | /* count the number of regulators to be supported in pmic */ | |
588 | pdata->num_regulators = of_get_child_count(regulators_np); | |
589 | ||
a86854d0 KC |
590 | rdata = devm_kcalloc(iodev->dev, |
591 | pdata->num_regulators, sizeof(*rdata), | |
592 | GFP_KERNEL); | |
58c95377 SK |
593 | if (!rdata) { |
594 | of_node_put(regulators_np); | |
ee999fb3 | 595 | return -ENOMEM; |
58c95377 | 596 | } |
ee999fb3 TF |
597 | |
598 | pdata->regulators = rdata; | |
599 | for (i = 0; i < ARRAY_SIZE(regulators); ++i) { | |
600 | reg_np = of_get_child_by_name(regulators_np, | |
601 | regulators[i].name); | |
602 | if (!reg_np) | |
603 | continue; | |
604 | ||
605 | rdata->id = regulators[i].id; | |
072e78b1 JMC |
606 | rdata->initdata = of_get_regulator_init_data(iodev->dev, |
607 | reg_np, | |
608 | ®ulators[i]); | |
ee999fb3 TF |
609 | rdata->reg_node = reg_np; |
610 | ++rdata; | |
611 | } | |
612 | pdata->num_regulators = rdata - pdata->regulators; | |
613 | ||
58c95377 SK |
614 | of_node_put(reg_np); |
615 | of_node_put(regulators_np); | |
616 | ||
ee999fb3 TF |
617 | ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); |
618 | if (ret) | |
619 | return -EINVAL; | |
620 | ||
621 | if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL)) | |
622 | pdata->buck_voltage_lock = true; | |
623 | ||
624 | ret = of_property_read_u32(pmic_np, | |
625 | "max8998,pmic-buck1-default-dvs-idx", | |
626 | &pdata->buck1_default_idx); | |
627 | if (!ret && pdata->buck1_default_idx >= 4) { | |
628 | pdata->buck1_default_idx = 0; | |
629 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); | |
630 | } | |
631 | ||
632 | ret = of_property_read_u32(pmic_np, | |
633 | "max8998,pmic-buck2-default-dvs-idx", | |
634 | &pdata->buck2_default_idx); | |
635 | if (!ret && pdata->buck2_default_idx >= 2) { | |
636 | pdata->buck2_default_idx = 0; | |
637 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); | |
638 | } | |
639 | ||
640 | ret = of_property_read_u32_array(pmic_np, | |
641 | "max8998,pmic-buck1-dvs-voltage", | |
642 | pdata->buck1_voltage, | |
643 | ARRAY_SIZE(pdata->buck1_voltage)); | |
644 | if (ret) { | |
645 | dev_err(iodev->dev, "buck1 voltages not specified\n"); | |
646 | return -EINVAL; | |
647 | } | |
648 | ||
649 | ret = of_property_read_u32_array(pmic_np, | |
650 | "max8998,pmic-buck2-dvs-voltage", | |
651 | pdata->buck2_voltage, | |
652 | ARRAY_SIZE(pdata->buck2_voltage)); | |
653 | if (ret) { | |
654 | dev_err(iodev->dev, "buck2 voltages not specified\n"); | |
655 | return -EINVAL; | |
656 | } | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
a5023574 | 661 | static int max8998_pmic_probe(struct platform_device *pdev) |
156f2528 KP |
662 | { |
663 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
ee999fb3 | 664 | struct max8998_platform_data *pdata = iodev->pdata; |
c172708d | 665 | struct regulator_config config = { }; |
8a221df6 | 666 | struct regulator_dev *rdev; |
156f2528 | 667 | struct max8998_data *max8998; |
50f19a45 | 668 | struct i2c_client *i2c; |
8a221df6 | 669 | int i, ret; |
4280e0b4 | 670 | unsigned int v; |
156f2528 KP |
671 | |
672 | if (!pdata) { | |
673 | dev_err(pdev->dev.parent, "No platform init data supplied\n"); | |
674 | return -ENODEV; | |
675 | } | |
676 | ||
ee999fb3 TF |
677 | if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) { |
678 | ret = max8998_pmic_dt_parse_pdata(iodev, pdata); | |
679 | if (ret) | |
680 | return ret; | |
681 | } | |
682 | ||
0f80ea14 AL |
683 | max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), |
684 | GFP_KERNEL); | |
156f2528 KP |
685 | if (!max8998) |
686 | return -ENOMEM; | |
687 | ||
747cc851 | 688 | max8998->dev = &pdev->dev; |
156f2528 | 689 | max8998->iodev = iodev; |
c356cbc2 | 690 | max8998->num_regulators = pdata->num_regulators; |
156f2528 | 691 | platform_set_drvdata(pdev, max8998); |
50f19a45 LM |
692 | i2c = max8998->iodev->i2c; |
693 | ||
735a3d9e MH |
694 | max8998->buck1_idx = pdata->buck1_default_idx; |
695 | max8998->buck2_idx = pdata->buck2_default_idx; | |
696 | ||
50f19a45 LM |
697 | /* NOTE: */ |
698 | /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ | |
699 | /* will be displayed */ | |
700 | ||
701 | /* Check if MAX8998 voltage selection GPIOs are defined */ | |
702 | if (gpio_is_valid(pdata->buck1_set1) && | |
703 | gpio_is_valid(pdata->buck1_set2)) { | |
704 | /* Check if SET1 is not equal to 0 */ | |
705 | if (!pdata->buck1_set1) { | |
9df19a55 TF |
706 | dev_err(&pdev->dev, |
707 | "MAX8998 SET1 GPIO defined as 0 !\n"); | |
50f19a45 | 708 | WARN_ON(!pdata->buck1_set1); |
8d491bf4 | 709 | return -EIO; |
50f19a45 LM |
710 | } |
711 | /* Check if SET2 is not equal to 0 */ | |
712 | if (!pdata->buck1_set2) { | |
9df19a55 TF |
713 | dev_err(&pdev->dev, |
714 | "MAX8998 SET2 GPIO defined as 0 !\n"); | |
50f19a45 | 715 | WARN_ON(!pdata->buck1_set2); |
8d491bf4 | 716 | return -EIO; |
50f19a45 LM |
717 | } |
718 | ||
719 | gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); | |
720 | gpio_direction_output(pdata->buck1_set1, | |
721 | max8998->buck1_idx & 0x1); | |
722 | ||
723 | ||
724 | gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); | |
725 | gpio_direction_output(pdata->buck1_set2, | |
726 | (max8998->buck1_idx >> 1) & 0x1); | |
50f19a45 | 727 | |
4280e0b4 TF |
728 | /* Set predefined values for BUCK1 registers */ |
729 | for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) { | |
0dceab33 AL |
730 | int index = MAX8998_BUCK1 - MAX8998_LDO2; |
731 | ||
4280e0b4 | 732 | i = 0; |
0dceab33 AL |
733 | while (regulators[index].min_uV + |
734 | regulators[index].uV_step * i | |
4280e0b4 TF |
735 | < pdata->buck1_voltage[v]) |
736 | i++; | |
737 | ||
738 | max8998->buck1_vol[v] = i; | |
739 | ret = max8998_write_reg(i2c, | |
740 | MAX8998_REG_BUCK1_VOLTAGE1 + v, i); | |
741 | if (ret) | |
8d491bf4 | 742 | return ret; |
4280e0b4 | 743 | } |
50f19a45 LM |
744 | } |
745 | ||
746 | if (gpio_is_valid(pdata->buck2_set3)) { | |
747 | /* Check if SET3 is not equal to 0 */ | |
748 | if (!pdata->buck2_set3) { | |
9df19a55 TF |
749 | dev_err(&pdev->dev, |
750 | "MAX8998 SET3 GPIO defined as 0 !\n"); | |
50f19a45 | 751 | WARN_ON(!pdata->buck2_set3); |
8d491bf4 | 752 | return -EIO; |
50f19a45 LM |
753 | } |
754 | gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); | |
755 | gpio_direction_output(pdata->buck2_set3, | |
756 | max8998->buck2_idx & 0x1); | |
757 | ||
4280e0b4 TF |
758 | /* Set predefined values for BUCK2 registers */ |
759 | for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) { | |
0dceab33 AL |
760 | int index = MAX8998_BUCK2 - MAX8998_LDO2; |
761 | ||
4280e0b4 | 762 | i = 0; |
0dceab33 AL |
763 | while (regulators[index].min_uV + |
764 | regulators[index].uV_step * i | |
4280e0b4 TF |
765 | < pdata->buck2_voltage[v]) |
766 | i++; | |
767 | ||
768 | max8998->buck2_vol[v] = i; | |
769 | ret = max8998_write_reg(i2c, | |
770 | MAX8998_REG_BUCK2_VOLTAGE1 + v, i); | |
771 | if (ret) | |
8d491bf4 | 772 | return ret; |
4280e0b4 | 773 | } |
50f19a45 | 774 | } |
156f2528 KP |
775 | |
776 | for (i = 0; i < pdata->num_regulators; i++) { | |
0dceab33 | 777 | int index = pdata->regulators[i].id - MAX8998_LDO2; |
c172708d MB |
778 | |
779 | config.dev = max8998->dev; | |
ee999fb3 | 780 | config.of_node = pdata->regulators[i].reg_node; |
c172708d MB |
781 | config.init_data = pdata->regulators[i].initdata; |
782 | config.driver_data = max8998; | |
783 | ||
8a221df6 AL |
784 | rdev = devm_regulator_register(&pdev->dev, ®ulators[index], |
785 | &config); | |
786 | if (IS_ERR(rdev)) { | |
787 | ret = PTR_ERR(rdev); | |
ee999fb3 TF |
788 | dev_err(max8998->dev, "regulator %s init failed (%d)\n", |
789 | regulators[index].name, ret); | |
8d491bf4 | 790 | return ret; |
156f2528 KP |
791 | } |
792 | } | |
793 | ||
156f2528 KP |
794 | return 0; |
795 | } | |
796 | ||
337ce5d1 MH |
797 | static const struct platform_device_id max8998_pmic_id[] = { |
798 | { "max8998-pmic", TYPE_MAX8998 }, | |
799 | { "lp3974-pmic", TYPE_LP3974 }, | |
800 | { } | |
801 | }; | |
a51b907b | 802 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
337ce5d1 | 803 | |
156f2528 KP |
804 | static struct platform_driver max8998_pmic_driver = { |
805 | .driver = { | |
806 | .name = "max8998-pmic", | |
156f2528 KP |
807 | }, |
808 | .probe = max8998_pmic_probe, | |
337ce5d1 | 809 | .id_table = max8998_pmic_id, |
156f2528 KP |
810 | }; |
811 | ||
812 | static int __init max8998_pmic_init(void) | |
813 | { | |
814 | return platform_driver_register(&max8998_pmic_driver); | |
815 | } | |
816 | subsys_initcall(max8998_pmic_init); | |
817 | ||
818 | static void __exit max8998_pmic_cleanup(void) | |
819 | { | |
820 | platform_driver_unregister(&max8998_pmic_driver); | |
821 | } | |
822 | module_exit(max8998_pmic_cleanup); | |
823 | ||
824 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); | |
825 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
826 | MODULE_LICENSE("GPL"); |