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156f2528 KP |
1 | /* |
2 | * max8998.c - Voltage regulator driver for the Maxim 8998 | |
3 | * | |
4 | * Copyright (C) 2009-2010 Samsung Electronics | |
5 | * Kyungmin Park <kyungmin.park@samsung.com> | |
6 | * Marek Szyprowski <m.szyprowski@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/i2c.h> | |
26 | #include <linux/err.h> | |
27 | #include <linux/gpio.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/mutex.h> | |
ee999fb3 TF |
31 | #include <linux/of.h> |
32 | #include <linux/of_gpio.h> | |
156f2528 KP |
33 | #include <linux/platform_device.h> |
34 | #include <linux/regulator/driver.h> | |
ee999fb3 | 35 | #include <linux/regulator/of_regulator.h> |
156f2528 KP |
36 | #include <linux/mfd/max8998.h> |
37 | #include <linux/mfd/max8998-private.h> | |
38 | ||
39 | struct max8998_data { | |
40 | struct device *dev; | |
41 | struct max8998_dev *iodev; | |
42 | int num_regulators; | |
43 | struct regulator_dev **rdev; | |
889cd5a6 LM |
44 | u8 buck1_vol[4]; /* voltages for selection */ |
45 | u8 buck2_vol[2]; | |
46 | unsigned int buck1_idx; /* index to last changed voltage */ | |
47 | /* value in a set */ | |
48 | unsigned int buck2_idx; | |
156f2528 KP |
49 | }; |
50 | ||
51 | struct voltage_map_desc { | |
52 | int min; | |
53 | int max; | |
54 | int step; | |
55 | }; | |
56 | ||
adf6178a | 57 | /* Voltage maps in uV*/ |
156f2528 | 58 | static const struct voltage_map_desc ldo23_voltage_map_desc = { |
adf6178a | 59 | .min = 800000, .step = 50000, .max = 1300000, |
156f2528 KP |
60 | }; |
61 | static const struct voltage_map_desc ldo456711_voltage_map_desc = { | |
adf6178a | 62 | .min = 1600000, .step = 100000, .max = 3600000, |
156f2528 KP |
63 | }; |
64 | static const struct voltage_map_desc ldo8_voltage_map_desc = { | |
adf6178a | 65 | .min = 3000000, .step = 100000, .max = 3600000, |
156f2528 KP |
66 | }; |
67 | static const struct voltage_map_desc ldo9_voltage_map_desc = { | |
adf6178a | 68 | .min = 2800000, .step = 100000, .max = 3100000, |
156f2528 KP |
69 | }; |
70 | static const struct voltage_map_desc ldo10_voltage_map_desc = { | |
36a6f8c0 | 71 | .min = 950000, .step = 50000, .max = 1300000, |
156f2528 KP |
72 | }; |
73 | static const struct voltage_map_desc ldo1213_voltage_map_desc = { | |
adf6178a | 74 | .min = 800000, .step = 100000, .max = 3300000, |
156f2528 KP |
75 | }; |
76 | static const struct voltage_map_desc ldo1415_voltage_map_desc = { | |
adf6178a | 77 | .min = 1200000, .step = 100000, .max = 3300000, |
156f2528 KP |
78 | }; |
79 | static const struct voltage_map_desc ldo1617_voltage_map_desc = { | |
adf6178a | 80 | .min = 1600000, .step = 100000, .max = 3600000, |
156f2528 KP |
81 | }; |
82 | static const struct voltage_map_desc buck12_voltage_map_desc = { | |
adf6178a | 83 | .min = 750000, .step = 25000, .max = 1525000, |
156f2528 KP |
84 | }; |
85 | static const struct voltage_map_desc buck3_voltage_map_desc = { | |
adf6178a | 86 | .min = 1600000, .step = 100000, .max = 3600000, |
156f2528 KP |
87 | }; |
88 | static const struct voltage_map_desc buck4_voltage_map_desc = { | |
adf6178a | 89 | .min = 800000, .step = 100000, .max = 2300000, |
156f2528 KP |
90 | }; |
91 | ||
92 | static const struct voltage_map_desc *ldo_voltage_map[] = { | |
93 | NULL, | |
94 | NULL, | |
95 | &ldo23_voltage_map_desc, /* LDO2 */ | |
96 | &ldo23_voltage_map_desc, /* LDO3 */ | |
97 | &ldo456711_voltage_map_desc, /* LDO4 */ | |
98 | &ldo456711_voltage_map_desc, /* LDO5 */ | |
99 | &ldo456711_voltage_map_desc, /* LDO6 */ | |
100 | &ldo456711_voltage_map_desc, /* LDO7 */ | |
101 | &ldo8_voltage_map_desc, /* LDO8 */ | |
102 | &ldo9_voltage_map_desc, /* LDO9 */ | |
103 | &ldo10_voltage_map_desc, /* LDO10 */ | |
104 | &ldo456711_voltage_map_desc, /* LDO11 */ | |
105 | &ldo1213_voltage_map_desc, /* LDO12 */ | |
106 | &ldo1213_voltage_map_desc, /* LDO13 */ | |
107 | &ldo1415_voltage_map_desc, /* LDO14 */ | |
108 | &ldo1415_voltage_map_desc, /* LDO15 */ | |
109 | &ldo1617_voltage_map_desc, /* LDO16 */ | |
110 | &ldo1617_voltage_map_desc, /* LDO17 */ | |
111 | &buck12_voltage_map_desc, /* BUCK1 */ | |
112 | &buck12_voltage_map_desc, /* BUCK2 */ | |
113 | &buck3_voltage_map_desc, /* BUCK3 */ | |
114 | &buck4_voltage_map_desc, /* BUCK4 */ | |
115 | }; | |
116 | ||
156f2528 KP |
117 | static int max8998_get_enable_register(struct regulator_dev *rdev, |
118 | int *reg, int *shift) | |
119 | { | |
7b94791b | 120 | int ldo = rdev_get_id(rdev); |
156f2528 KP |
121 | |
122 | switch (ldo) { | |
123 | case MAX8998_LDO2 ... MAX8998_LDO5: | |
124 | *reg = MAX8998_REG_ONOFF1; | |
125 | *shift = 3 - (ldo - MAX8998_LDO2); | |
126 | break; | |
127 | case MAX8998_LDO6 ... MAX8998_LDO13: | |
128 | *reg = MAX8998_REG_ONOFF2; | |
129 | *shift = 7 - (ldo - MAX8998_LDO6); | |
130 | break; | |
131 | case MAX8998_LDO14 ... MAX8998_LDO17: | |
132 | *reg = MAX8998_REG_ONOFF3; | |
133 | *shift = 7 - (ldo - MAX8998_LDO14); | |
134 | break; | |
135 | case MAX8998_BUCK1 ... MAX8998_BUCK4: | |
136 | *reg = MAX8998_REG_ONOFF1; | |
137 | *shift = 7 - (ldo - MAX8998_BUCK1); | |
138 | break; | |
139 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: | |
140 | *reg = MAX8998_REG_ONOFF4; | |
141 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); | |
142 | break; | |
143 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: | |
144 | *reg = MAX8998_REG_CHGR2; | |
145 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); | |
146 | break; | |
147 | default: | |
148 | return -EINVAL; | |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) | |
155 | { | |
156 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 157 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
158 | int ret, reg, shift = 8; |
159 | u8 val; | |
160 | ||
161 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
162 | if (ret) | |
163 | return ret; | |
164 | ||
676e02d7 | 165 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
166 | if (ret) |
167 | return ret; | |
168 | ||
169 | return val & (1 << shift); | |
170 | } | |
171 | ||
172 | static int max8998_ldo_enable(struct regulator_dev *rdev) | |
173 | { | |
174 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 175 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
176 | int reg, shift = 8, ret; |
177 | ||
178 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
179 | if (ret) | |
180 | return ret; | |
181 | ||
676e02d7 | 182 | return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
156f2528 KP |
183 | } |
184 | ||
185 | static int max8998_ldo_disable(struct regulator_dev *rdev) | |
186 | { | |
187 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 188 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
189 | int reg, shift = 8, ret; |
190 | ||
191 | ret = max8998_get_enable_register(rdev, ®, &shift); | |
192 | if (ret) | |
193 | return ret; | |
194 | ||
676e02d7 | 195 | return max8998_update_reg(i2c, reg, 0, 1<<shift); |
156f2528 KP |
196 | } |
197 | ||
198 | static int max8998_get_voltage_register(struct regulator_dev *rdev, | |
199 | int *_reg, int *_shift, int *_mask) | |
200 | { | |
7b94791b | 201 | int ldo = rdev_get_id(rdev); |
889cd5a6 | 202 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
156f2528 KP |
203 | int reg, shift = 0, mask = 0xff; |
204 | ||
205 | switch (ldo) { | |
206 | case MAX8998_LDO2 ... MAX8998_LDO3: | |
207 | reg = MAX8998_REG_LDO2_LDO3; | |
208 | mask = 0xf; | |
209 | if (ldo == MAX8998_LDO2) | |
210 | shift = 4; | |
211 | else | |
212 | shift = 0; | |
213 | break; | |
214 | case MAX8998_LDO4 ... MAX8998_LDO7: | |
215 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); | |
216 | break; | |
217 | case MAX8998_LDO8 ... MAX8998_LDO9: | |
218 | reg = MAX8998_REG_LDO8_LDO9; | |
219 | mask = 0xf; | |
220 | if (ldo == MAX8998_LDO8) | |
221 | shift = 4; | |
222 | else | |
223 | shift = 0; | |
224 | break; | |
225 | case MAX8998_LDO10 ... MAX8998_LDO11: | |
226 | reg = MAX8998_REG_LDO10_LDO11; | |
227 | if (ldo == MAX8998_LDO10) { | |
228 | shift = 5; | |
229 | mask = 0x7; | |
230 | } else { | |
231 | shift = 0; | |
232 | mask = 0x1f; | |
233 | } | |
234 | break; | |
235 | case MAX8998_LDO12 ... MAX8998_LDO17: | |
236 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); | |
237 | break; | |
238 | case MAX8998_BUCK1: | |
889cd5a6 | 239 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
156f2528 KP |
240 | break; |
241 | case MAX8998_BUCK2: | |
889cd5a6 | 242 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
156f2528 KP |
243 | break; |
244 | case MAX8998_BUCK3: | |
245 | reg = MAX8998_REG_BUCK3; | |
246 | break; | |
247 | case MAX8998_BUCK4: | |
248 | reg = MAX8998_REG_BUCK4; | |
249 | break; | |
250 | default: | |
251 | return -EINVAL; | |
252 | } | |
253 | ||
254 | *_reg = reg; | |
255 | *_shift = shift; | |
256 | *_mask = mask; | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
7b4354b4 | 261 | static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
156f2528 KP |
262 | { |
263 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
676e02d7 | 264 | struct i2c_client *i2c = max8998->iodev->i2c; |
156f2528 KP |
265 | int reg, shift = 0, mask, ret; |
266 | u8 val; | |
267 | ||
268 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); | |
269 | if (ret) | |
270 | return ret; | |
271 | ||
676e02d7 | 272 | ret = max8998_read_reg(i2c, reg, &val); |
156f2528 KP |
273 | if (ret) |
274 | return ret; | |
275 | ||
276 | val >>= shift; | |
277 | val &= mask; | |
278 | ||
7b4354b4 | 279 | return val; |
156f2528 KP |
280 | } |
281 | ||
baae019e AL |
282 | static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, |
283 | unsigned selector) | |
9d92492f LM |
284 | { |
285 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
286 | struct i2c_client *i2c = max8998->iodev->i2c; | |
baae019e | 287 | int reg, shift = 0, mask, ret; |
3a93f2a9 | 288 | |
9d92492f LM |
289 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
290 | if (ret) | |
291 | return ret; | |
292 | ||
baae019e | 293 | ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); |
9d92492f LM |
294 | |
295 | return ret; | |
296 | } | |
297 | ||
50f19a45 LM |
298 | static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
299 | { | |
300 | gpio_set_value(gpio1, v & 0x1); | |
301 | gpio_set_value(gpio2, (v >> 1) & 0x1); | |
302 | } | |
303 | ||
304 | static inline void buck2_gpio_set(int gpio, int v) | |
305 | { | |
306 | gpio_set_value(gpio, v & 0x1); | |
307 | } | |
308 | ||
baae019e AL |
309 | static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, |
310 | unsigned selector) | |
156f2528 KP |
311 | { |
312 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
50f19a45 LM |
313 | struct max8998_platform_data *pdata = |
314 | dev_get_platdata(max8998->iodev->dev); | |
676e02d7 | 315 | struct i2c_client *i2c = max8998->iodev->i2c; |
7b94791b | 316 | int buck = rdev_get_id(rdev); |
c6163a70 | 317 | int reg, shift = 0, mask, ret, j; |
50f19a45 | 318 | static u8 buck1_last_val; |
156f2528 | 319 | |
156f2528 KP |
320 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
321 | if (ret) | |
322 | return ret; | |
323 | ||
50f19a45 LM |
324 | switch (buck) { |
325 | case MAX8998_BUCK1: | |
326 | dev_dbg(max8998->dev, | |
baae019e | 327 | "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
85ee7a1d | 328 | "buck1_vol3:%d, buck1_vol4:%d\n", |
baae019e | 329 | selector, max8998->buck1_vol[0], max8998->buck1_vol[1], |
50f19a45 LM |
330 | max8998->buck1_vol[2], max8998->buck1_vol[3]); |
331 | ||
332 | if (gpio_is_valid(pdata->buck1_set1) && | |
333 | gpio_is_valid(pdata->buck1_set2)) { | |
334 | ||
335 | /* check if requested voltage */ | |
336 | /* value is already defined */ | |
337 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { | |
baae019e | 338 | if (max8998->buck1_vol[j] == selector) { |
50f19a45 LM |
339 | max8998->buck1_idx = j; |
340 | buck1_gpio_set(pdata->buck1_set1, | |
341 | pdata->buck1_set2, j); | |
342 | goto buck1_exit; | |
343 | } | |
344 | } | |
345 | ||
735a3d9e MH |
346 | if (pdata->buck_voltage_lock) |
347 | return -EINVAL; | |
348 | ||
50f19a45 LM |
349 | /* no predefine regulator found */ |
350 | max8998->buck1_idx = (buck1_last_val % 2) + 2; | |
351 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", | |
352 | max8998->buck1_idx); | |
baae019e | 353 | max8998->buck1_vol[max8998->buck1_idx] = selector; |
50f19a45 LM |
354 | ret = max8998_get_voltage_register(rdev, ®, |
355 | &shift, | |
356 | &mask); | |
baae019e | 357 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
358 | buck1_gpio_set(pdata->buck1_set1, |
359 | pdata->buck1_set2, max8998->buck1_idx); | |
360 | buck1_last_val++; | |
361 | buck1_exit: | |
362 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", | |
363 | i2c->name, gpio_get_value(pdata->buck1_set1), | |
364 | gpio_get_value(pdata->buck1_set2)); | |
365 | break; | |
366 | } else { | |
baae019e | 367 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
368 | } |
369 | break; | |
c5a4655d | 370 | |
50f19a45 LM |
371 | case MAX8998_BUCK2: |
372 | dev_dbg(max8998->dev, | |
baae019e AL |
373 | "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", |
374 | selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); | |
50f19a45 | 375 | if (gpio_is_valid(pdata->buck2_set3)) { |
735a3d9e MH |
376 | |
377 | /* check if requested voltage */ | |
378 | /* value is already defined */ | |
379 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { | |
baae019e | 380 | if (max8998->buck2_vol[j] == selector) { |
735a3d9e MH |
381 | max8998->buck2_idx = j; |
382 | buck2_gpio_set(pdata->buck2_set3, j); | |
383 | goto buck2_exit; | |
384 | } | |
50f19a45 | 385 | } |
735a3d9e MH |
386 | |
387 | if (pdata->buck_voltage_lock) | |
388 | return -EINVAL; | |
389 | ||
390 | max8998_get_voltage_register(rdev, | |
391 | ®, &shift, &mask); | |
baae019e AL |
392 | ret = max8998_write_reg(i2c, reg, selector); |
393 | max8998->buck2_vol[max8998->buck2_idx] = selector; | |
735a3d9e MH |
394 | buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); |
395 | buck2_exit: | |
50f19a45 LM |
396 | dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
397 | gpio_get_value(pdata->buck2_set3)); | |
398 | } else { | |
baae019e | 399 | ret = max8998_write_reg(i2c, reg, selector); |
50f19a45 LM |
400 | } |
401 | break; | |
402 | ||
403 | case MAX8998_BUCK3: | |
404 | case MAX8998_BUCK4: | |
baae019e AL |
405 | ret = max8998_update_reg(i2c, reg, selector<<shift, |
406 | mask<<shift); | |
50f19a45 | 407 | break; |
c5a4655d MH |
408 | } |
409 | ||
276909d3 AL |
410 | return ret; |
411 | } | |
412 | ||
413 | static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, | |
414 | unsigned int old_selector, | |
415 | unsigned int new_selector) | |
416 | { | |
417 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); | |
418 | struct i2c_client *i2c = max8998->iodev->i2c; | |
419 | const struct voltage_map_desc *desc; | |
420 | int buck = rdev_get_id(rdev); | |
421 | u8 val = 0; | |
422 | int difference, ret; | |
423 | ||
424 | if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) | |
425 | return -EINVAL; | |
426 | ||
427 | desc = ldo_voltage_map[buck]; | |
428 | ||
50f19a45 | 429 | /* Voltage stabilization */ |
276909d3 AL |
430 | ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); |
431 | if (ret) | |
432 | return ret; | |
50f19a45 LM |
433 | |
434 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ | |
435 | /* MAX8998 has ENRAMP bit implemented, so test it*/ | |
436 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) | |
276909d3 | 437 | return 0; |
50f19a45 | 438 | |
adf6178a | 439 | difference = (new_selector - old_selector) * desc->step / 1000; |
50f19a45 | 440 | if (difference > 0) |
81d0a6ae | 441 | return DIV_ROUND_UP(difference, (val & 0x0f) + 1); |
50f19a45 | 442 | |
276909d3 | 443 | return 0; |
156f2528 KP |
444 | } |
445 | ||
446 | static struct regulator_ops max8998_ldo_ops = { | |
9a0fbb62 | 447 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 448 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
449 | .is_enabled = max8998_ldo_is_enabled, |
450 | .enable = max8998_ldo_enable, | |
451 | .disable = max8998_ldo_disable, | |
7b4354b4 | 452 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 453 | .set_voltage_sel = max8998_set_voltage_ldo_sel, |
156f2528 KP |
454 | }; |
455 | ||
456 | static struct regulator_ops max8998_buck_ops = { | |
9a0fbb62 | 457 | .list_voltage = regulator_list_voltage_linear, |
baae019e | 458 | .map_voltage = regulator_map_voltage_linear, |
156f2528 KP |
459 | .is_enabled = max8998_ldo_is_enabled, |
460 | .enable = max8998_ldo_enable, | |
461 | .disable = max8998_ldo_disable, | |
7b4354b4 | 462 | .get_voltage_sel = max8998_get_voltage_sel, |
baae019e | 463 | .set_voltage_sel = max8998_set_voltage_buck_sel, |
276909d3 | 464 | .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, |
156f2528 KP |
465 | }; |
466 | ||
467 | static struct regulator_ops max8998_others_ops = { | |
468 | .is_enabled = max8998_ldo_is_enabled, | |
469 | .enable = max8998_ldo_enable, | |
470 | .disable = max8998_ldo_disable, | |
156f2528 KP |
471 | }; |
472 | ||
473 | static struct regulator_desc regulators[] = { | |
474 | { | |
475 | .name = "LDO2", | |
476 | .id = MAX8998_LDO2, | |
477 | .ops = &max8998_ldo_ops, | |
478 | .type = REGULATOR_VOLTAGE, | |
479 | .owner = THIS_MODULE, | |
480 | }, { | |
481 | .name = "LDO3", | |
482 | .id = MAX8998_LDO3, | |
483 | .ops = &max8998_ldo_ops, | |
484 | .type = REGULATOR_VOLTAGE, | |
485 | .owner = THIS_MODULE, | |
486 | }, { | |
487 | .name = "LDO4", | |
488 | .id = MAX8998_LDO4, | |
489 | .ops = &max8998_ldo_ops, | |
490 | .type = REGULATOR_VOLTAGE, | |
491 | .owner = THIS_MODULE, | |
492 | }, { | |
493 | .name = "LDO5", | |
494 | .id = MAX8998_LDO5, | |
495 | .ops = &max8998_ldo_ops, | |
496 | .type = REGULATOR_VOLTAGE, | |
497 | .owner = THIS_MODULE, | |
498 | }, { | |
499 | .name = "LDO6", | |
500 | .id = MAX8998_LDO6, | |
501 | .ops = &max8998_ldo_ops, | |
502 | .type = REGULATOR_VOLTAGE, | |
503 | .owner = THIS_MODULE, | |
504 | }, { | |
505 | .name = "LDO7", | |
506 | .id = MAX8998_LDO7, | |
507 | .ops = &max8998_ldo_ops, | |
508 | .type = REGULATOR_VOLTAGE, | |
509 | .owner = THIS_MODULE, | |
510 | }, { | |
511 | .name = "LDO8", | |
512 | .id = MAX8998_LDO8, | |
513 | .ops = &max8998_ldo_ops, | |
514 | .type = REGULATOR_VOLTAGE, | |
515 | .owner = THIS_MODULE, | |
516 | }, { | |
517 | .name = "LDO9", | |
518 | .id = MAX8998_LDO9, | |
519 | .ops = &max8998_ldo_ops, | |
520 | .type = REGULATOR_VOLTAGE, | |
521 | .owner = THIS_MODULE, | |
522 | }, { | |
523 | .name = "LDO10", | |
524 | .id = MAX8998_LDO10, | |
525 | .ops = &max8998_ldo_ops, | |
526 | .type = REGULATOR_VOLTAGE, | |
527 | .owner = THIS_MODULE, | |
528 | }, { | |
529 | .name = "LDO11", | |
530 | .id = MAX8998_LDO11, | |
531 | .ops = &max8998_ldo_ops, | |
532 | .type = REGULATOR_VOLTAGE, | |
533 | .owner = THIS_MODULE, | |
534 | }, { | |
535 | .name = "LDO12", | |
536 | .id = MAX8998_LDO12, | |
537 | .ops = &max8998_ldo_ops, | |
538 | .type = REGULATOR_VOLTAGE, | |
539 | .owner = THIS_MODULE, | |
540 | }, { | |
541 | .name = "LDO13", | |
542 | .id = MAX8998_LDO13, | |
543 | .ops = &max8998_ldo_ops, | |
544 | .type = REGULATOR_VOLTAGE, | |
545 | .owner = THIS_MODULE, | |
546 | }, { | |
547 | .name = "LDO14", | |
548 | .id = MAX8998_LDO14, | |
549 | .ops = &max8998_ldo_ops, | |
550 | .type = REGULATOR_VOLTAGE, | |
551 | .owner = THIS_MODULE, | |
552 | }, { | |
553 | .name = "LDO15", | |
554 | .id = MAX8998_LDO15, | |
555 | .ops = &max8998_ldo_ops, | |
556 | .type = REGULATOR_VOLTAGE, | |
557 | .owner = THIS_MODULE, | |
558 | }, { | |
559 | .name = "LDO16", | |
560 | .id = MAX8998_LDO16, | |
561 | .ops = &max8998_ldo_ops, | |
562 | .type = REGULATOR_VOLTAGE, | |
563 | .owner = THIS_MODULE, | |
564 | }, { | |
565 | .name = "LDO17", | |
566 | .id = MAX8998_LDO17, | |
567 | .ops = &max8998_ldo_ops, | |
568 | .type = REGULATOR_VOLTAGE, | |
569 | .owner = THIS_MODULE, | |
570 | }, { | |
571 | .name = "BUCK1", | |
572 | .id = MAX8998_BUCK1, | |
573 | .ops = &max8998_buck_ops, | |
574 | .type = REGULATOR_VOLTAGE, | |
575 | .owner = THIS_MODULE, | |
576 | }, { | |
577 | .name = "BUCK2", | |
578 | .id = MAX8998_BUCK2, | |
579 | .ops = &max8998_buck_ops, | |
580 | .type = REGULATOR_VOLTAGE, | |
581 | .owner = THIS_MODULE, | |
582 | }, { | |
583 | .name = "BUCK3", | |
584 | .id = MAX8998_BUCK3, | |
585 | .ops = &max8998_buck_ops, | |
586 | .type = REGULATOR_VOLTAGE, | |
587 | .owner = THIS_MODULE, | |
588 | }, { | |
589 | .name = "BUCK4", | |
590 | .id = MAX8998_BUCK4, | |
591 | .ops = &max8998_buck_ops, | |
592 | .type = REGULATOR_VOLTAGE, | |
593 | .owner = THIS_MODULE, | |
594 | }, { | |
ee999fb3 | 595 | .name = "EN32KHz-AP", |
156f2528 KP |
596 | .id = MAX8998_EN32KHZ_AP, |
597 | .ops = &max8998_others_ops, | |
598 | .type = REGULATOR_VOLTAGE, | |
599 | .owner = THIS_MODULE, | |
600 | }, { | |
ee999fb3 | 601 | .name = "EN32KHz-CP", |
156f2528 KP |
602 | .id = MAX8998_EN32KHZ_CP, |
603 | .ops = &max8998_others_ops, | |
604 | .type = REGULATOR_VOLTAGE, | |
605 | .owner = THIS_MODULE, | |
606 | }, { | |
607 | .name = "ENVICHG", | |
608 | .id = MAX8998_ENVICHG, | |
609 | .ops = &max8998_others_ops, | |
610 | .type = REGULATOR_VOLTAGE, | |
611 | .owner = THIS_MODULE, | |
612 | }, { | |
613 | .name = "ESAFEOUT1", | |
614 | .id = MAX8998_ESAFEOUT1, | |
615 | .ops = &max8998_others_ops, | |
616 | .type = REGULATOR_VOLTAGE, | |
617 | .owner = THIS_MODULE, | |
618 | }, { | |
619 | .name = "ESAFEOUT2", | |
620 | .id = MAX8998_ESAFEOUT2, | |
621 | .ops = &max8998_others_ops, | |
622 | .type = REGULATOR_VOLTAGE, | |
623 | .owner = THIS_MODULE, | |
624 | } | |
625 | }; | |
626 | ||
ee999fb3 TF |
627 | static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, |
628 | struct max8998_platform_data *pdata, | |
629 | struct device_node *pmic_np) | |
630 | { | |
631 | int gpio; | |
632 | ||
633 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0); | |
634 | if (!gpio_is_valid(gpio)) { | |
635 | dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio); | |
636 | return -EINVAL; | |
637 | } | |
638 | pdata->buck1_set1 = gpio; | |
639 | ||
640 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1); | |
641 | if (!gpio_is_valid(gpio)) { | |
642 | dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio); | |
643 | return -EINVAL; | |
644 | } | |
645 | pdata->buck1_set2 = gpio; | |
646 | ||
647 | gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0); | |
648 | if (!gpio_is_valid(gpio)) { | |
649 | dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio); | |
650 | return -EINVAL; | |
651 | } | |
652 | pdata->buck2_set3 = gpio; | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
657 | static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, | |
658 | struct max8998_platform_data *pdata) | |
659 | { | |
660 | struct device_node *pmic_np = iodev->dev->of_node; | |
661 | struct device_node *regulators_np, *reg_np; | |
662 | struct max8998_regulator_data *rdata; | |
663 | unsigned int i; | |
664 | int ret; | |
665 | ||
666 | regulators_np = of_get_child_by_name(pmic_np, "regulators"); | |
667 | if (!regulators_np) { | |
668 | dev_err(iodev->dev, "could not find regulators sub-node\n"); | |
669 | return -EINVAL; | |
670 | } | |
671 | ||
672 | /* count the number of regulators to be supported in pmic */ | |
673 | pdata->num_regulators = of_get_child_count(regulators_np); | |
674 | ||
675 | rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) * | |
676 | pdata->num_regulators, GFP_KERNEL); | |
677 | if (!rdata) | |
678 | return -ENOMEM; | |
679 | ||
680 | pdata->regulators = rdata; | |
681 | for (i = 0; i < ARRAY_SIZE(regulators); ++i) { | |
682 | reg_np = of_get_child_by_name(regulators_np, | |
683 | regulators[i].name); | |
684 | if (!reg_np) | |
685 | continue; | |
686 | ||
687 | rdata->id = regulators[i].id; | |
688 | rdata->initdata = of_get_regulator_init_data( | |
689 | iodev->dev, reg_np); | |
690 | rdata->reg_node = reg_np; | |
691 | ++rdata; | |
692 | } | |
693 | pdata->num_regulators = rdata - pdata->regulators; | |
694 | ||
695 | ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); | |
696 | if (ret) | |
697 | return -EINVAL; | |
698 | ||
699 | if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL)) | |
700 | pdata->buck_voltage_lock = true; | |
701 | ||
702 | ret = of_property_read_u32(pmic_np, | |
703 | "max8998,pmic-buck1-default-dvs-idx", | |
704 | &pdata->buck1_default_idx); | |
705 | if (!ret && pdata->buck1_default_idx >= 4) { | |
706 | pdata->buck1_default_idx = 0; | |
707 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); | |
708 | } | |
709 | ||
710 | ret = of_property_read_u32(pmic_np, | |
711 | "max8998,pmic-buck2-default-dvs-idx", | |
712 | &pdata->buck2_default_idx); | |
713 | if (!ret && pdata->buck2_default_idx >= 2) { | |
714 | pdata->buck2_default_idx = 0; | |
715 | dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); | |
716 | } | |
717 | ||
718 | ret = of_property_read_u32_array(pmic_np, | |
719 | "max8998,pmic-buck1-dvs-voltage", | |
720 | pdata->buck1_voltage, | |
721 | ARRAY_SIZE(pdata->buck1_voltage)); | |
722 | if (ret) { | |
723 | dev_err(iodev->dev, "buck1 voltages not specified\n"); | |
724 | return -EINVAL; | |
725 | } | |
726 | ||
727 | ret = of_property_read_u32_array(pmic_np, | |
728 | "max8998,pmic-buck2-dvs-voltage", | |
729 | pdata->buck2_voltage, | |
730 | ARRAY_SIZE(pdata->buck2_voltage)); | |
731 | if (ret) { | |
732 | dev_err(iodev->dev, "buck2 voltages not specified\n"); | |
733 | return -EINVAL; | |
734 | } | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
a5023574 | 739 | static int max8998_pmic_probe(struct platform_device *pdev) |
156f2528 KP |
740 | { |
741 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
ee999fb3 | 742 | struct max8998_platform_data *pdata = iodev->pdata; |
c172708d | 743 | struct regulator_config config = { }; |
156f2528 KP |
744 | struct regulator_dev **rdev; |
745 | struct max8998_data *max8998; | |
50f19a45 | 746 | struct i2c_client *i2c; |
156f2528 | 747 | int i, ret, size; |
4280e0b4 | 748 | unsigned int v; |
156f2528 KP |
749 | |
750 | if (!pdata) { | |
751 | dev_err(pdev->dev.parent, "No platform init data supplied\n"); | |
752 | return -ENODEV; | |
753 | } | |
754 | ||
ee999fb3 TF |
755 | if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) { |
756 | ret = max8998_pmic_dt_parse_pdata(iodev, pdata); | |
757 | if (ret) | |
758 | return ret; | |
759 | } | |
760 | ||
0f80ea14 AL |
761 | max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), |
762 | GFP_KERNEL); | |
156f2528 KP |
763 | if (!max8998) |
764 | return -ENOMEM; | |
765 | ||
11fa0d1d | 766 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; |
0f80ea14 AL |
767 | max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
768 | if (!max8998->rdev) | |
156f2528 | 769 | return -ENOMEM; |
156f2528 KP |
770 | |
771 | rdev = max8998->rdev; | |
747cc851 | 772 | max8998->dev = &pdev->dev; |
156f2528 | 773 | max8998->iodev = iodev; |
c356cbc2 | 774 | max8998->num_regulators = pdata->num_regulators; |
156f2528 | 775 | platform_set_drvdata(pdev, max8998); |
50f19a45 LM |
776 | i2c = max8998->iodev->i2c; |
777 | ||
735a3d9e MH |
778 | max8998->buck1_idx = pdata->buck1_default_idx; |
779 | max8998->buck2_idx = pdata->buck2_default_idx; | |
780 | ||
50f19a45 LM |
781 | /* NOTE: */ |
782 | /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ | |
783 | /* will be displayed */ | |
784 | ||
785 | /* Check if MAX8998 voltage selection GPIOs are defined */ | |
786 | if (gpio_is_valid(pdata->buck1_set1) && | |
787 | gpio_is_valid(pdata->buck1_set2)) { | |
788 | /* Check if SET1 is not equal to 0 */ | |
789 | if (!pdata->buck1_set1) { | |
9df19a55 TF |
790 | dev_err(&pdev->dev, |
791 | "MAX8998 SET1 GPIO defined as 0 !\n"); | |
50f19a45 | 792 | WARN_ON(!pdata->buck1_set1); |
8d491bf4 | 793 | return -EIO; |
50f19a45 LM |
794 | } |
795 | /* Check if SET2 is not equal to 0 */ | |
796 | if (!pdata->buck1_set2) { | |
9df19a55 TF |
797 | dev_err(&pdev->dev, |
798 | "MAX8998 SET2 GPIO defined as 0 !\n"); | |
50f19a45 | 799 | WARN_ON(!pdata->buck1_set2); |
8d491bf4 | 800 | return -EIO; |
50f19a45 LM |
801 | } |
802 | ||
803 | gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); | |
804 | gpio_direction_output(pdata->buck1_set1, | |
805 | max8998->buck1_idx & 0x1); | |
806 | ||
807 | ||
808 | gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); | |
809 | gpio_direction_output(pdata->buck1_set2, | |
810 | (max8998->buck1_idx >> 1) & 0x1); | |
50f19a45 | 811 | |
4280e0b4 TF |
812 | /* Set predefined values for BUCK1 registers */ |
813 | for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) { | |
814 | i = 0; | |
815 | while (buck12_voltage_map_desc.min + | |
816 | buck12_voltage_map_desc.step*i | |
817 | < pdata->buck1_voltage[v]) | |
818 | i++; | |
819 | ||
820 | max8998->buck1_vol[v] = i; | |
821 | ret = max8998_write_reg(i2c, | |
822 | MAX8998_REG_BUCK1_VOLTAGE1 + v, i); | |
823 | if (ret) | |
8d491bf4 | 824 | return ret; |
4280e0b4 | 825 | } |
50f19a45 LM |
826 | } |
827 | ||
828 | if (gpio_is_valid(pdata->buck2_set3)) { | |
829 | /* Check if SET3 is not equal to 0 */ | |
830 | if (!pdata->buck2_set3) { | |
9df19a55 TF |
831 | dev_err(&pdev->dev, |
832 | "MAX8998 SET3 GPIO defined as 0 !\n"); | |
50f19a45 | 833 | WARN_ON(!pdata->buck2_set3); |
8d491bf4 | 834 | return -EIO; |
50f19a45 LM |
835 | } |
836 | gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); | |
837 | gpio_direction_output(pdata->buck2_set3, | |
838 | max8998->buck2_idx & 0x1); | |
839 | ||
4280e0b4 TF |
840 | /* Set predefined values for BUCK2 registers */ |
841 | for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) { | |
842 | i = 0; | |
843 | while (buck12_voltage_map_desc.min + | |
844 | buck12_voltage_map_desc.step*i | |
845 | < pdata->buck2_voltage[v]) | |
846 | i++; | |
847 | ||
848 | max8998->buck2_vol[v] = i; | |
849 | ret = max8998_write_reg(i2c, | |
850 | MAX8998_REG_BUCK2_VOLTAGE1 + v, i); | |
851 | if (ret) | |
8d491bf4 | 852 | return ret; |
4280e0b4 | 853 | } |
50f19a45 | 854 | } |
156f2528 KP |
855 | |
856 | for (i = 0; i < pdata->num_regulators; i++) { | |
857 | const struct voltage_map_desc *desc; | |
858 | int id = pdata->regulators[i].id; | |
859 | int index = id - MAX8998_LDO2; | |
860 | ||
861 | desc = ldo_voltage_map[id]; | |
862 | if (desc && regulators[index].ops != &max8998_others_ops) { | |
863 | int count = (desc->max - desc->min) / desc->step + 1; | |
9a0fbb62 | 864 | |
156f2528 | 865 | regulators[index].n_voltages = count; |
adf6178a AL |
866 | regulators[index].min_uV = desc->min; |
867 | regulators[index].uV_step = desc->step; | |
156f2528 | 868 | } |
c172708d MB |
869 | |
870 | config.dev = max8998->dev; | |
ee999fb3 | 871 | config.of_node = pdata->regulators[i].reg_node; |
c172708d MB |
872 | config.init_data = pdata->regulators[i].initdata; |
873 | config.driver_data = max8998; | |
874 | ||
8d491bf4 SK |
875 | rdev[i] = devm_regulator_register(&pdev->dev, |
876 | ®ulators[index], &config); | |
156f2528 KP |
877 | if (IS_ERR(rdev[i])) { |
878 | ret = PTR_ERR(rdev[i]); | |
ee999fb3 TF |
879 | dev_err(max8998->dev, "regulator %s init failed (%d)\n", |
880 | regulators[index].name, ret); | |
156f2528 | 881 | rdev[i] = NULL; |
8d491bf4 | 882 | return ret; |
156f2528 KP |
883 | } |
884 | } | |
885 | ||
886 | ||
156f2528 KP |
887 | return 0; |
888 | } | |
889 | ||
337ce5d1 MH |
890 | static const struct platform_device_id max8998_pmic_id[] = { |
891 | { "max8998-pmic", TYPE_MAX8998 }, | |
892 | { "lp3974-pmic", TYPE_LP3974 }, | |
893 | { } | |
894 | }; | |
a51b907b | 895 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
337ce5d1 | 896 | |
156f2528 KP |
897 | static struct platform_driver max8998_pmic_driver = { |
898 | .driver = { | |
899 | .name = "max8998-pmic", | |
900 | .owner = THIS_MODULE, | |
901 | }, | |
902 | .probe = max8998_pmic_probe, | |
337ce5d1 | 903 | .id_table = max8998_pmic_id, |
156f2528 KP |
904 | }; |
905 | ||
906 | static int __init max8998_pmic_init(void) | |
907 | { | |
908 | return platform_driver_register(&max8998_pmic_driver); | |
909 | } | |
910 | subsys_initcall(max8998_pmic_init); | |
911 | ||
912 | static void __exit max8998_pmic_cleanup(void) | |
913 | { | |
914 | platform_driver_unregister(&max8998_pmic_driver); | |
915 | } | |
916 | module_exit(max8998_pmic_cleanup); | |
917 | ||
918 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); | |
919 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
920 | MODULE_LICENSE("GPL"); |