| 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> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/regulator/driver.h> |
| 33 | #include <linux/mfd/max8998.h> |
| 34 | #include <linux/mfd/max8998-private.h> |
| 35 | |
| 36 | struct max8998_data { |
| 37 | struct device *dev; |
| 38 | struct max8998_dev *iodev; |
| 39 | int num_regulators; |
| 40 | struct regulator_dev **rdev; |
| 41 | u8 buck1_vol[4]; /* voltages for selection */ |
| 42 | u8 buck2_vol[2]; |
| 43 | unsigned int buck1_idx; /* index to last changed voltage */ |
| 44 | /* value in a set */ |
| 45 | unsigned int buck2_idx; |
| 46 | }; |
| 47 | |
| 48 | struct voltage_map_desc { |
| 49 | int min; |
| 50 | int max; |
| 51 | int step; |
| 52 | }; |
| 53 | |
| 54 | /* Voltage maps in uV*/ |
| 55 | static const struct voltage_map_desc ldo23_voltage_map_desc = { |
| 56 | .min = 800000, .step = 50000, .max = 1300000, |
| 57 | }; |
| 58 | static const struct voltage_map_desc ldo456711_voltage_map_desc = { |
| 59 | .min = 1600000, .step = 100000, .max = 3600000, |
| 60 | }; |
| 61 | static const struct voltage_map_desc ldo8_voltage_map_desc = { |
| 62 | .min = 3000000, .step = 100000, .max = 3600000, |
| 63 | }; |
| 64 | static const struct voltage_map_desc ldo9_voltage_map_desc = { |
| 65 | .min = 2800000, .step = 100000, .max = 3100000, |
| 66 | }; |
| 67 | static const struct voltage_map_desc ldo10_voltage_map_desc = { |
| 68 | .min = 950000, .step = 50000, .max = 1300000, |
| 69 | }; |
| 70 | static const struct voltage_map_desc ldo1213_voltage_map_desc = { |
| 71 | .min = 800000, .step = 100000, .max = 3300000, |
| 72 | }; |
| 73 | static const struct voltage_map_desc ldo1415_voltage_map_desc = { |
| 74 | .min = 1200000, .step = 100000, .max = 3300000, |
| 75 | }; |
| 76 | static const struct voltage_map_desc ldo1617_voltage_map_desc = { |
| 77 | .min = 1600000, .step = 100000, .max = 3600000, |
| 78 | }; |
| 79 | static const struct voltage_map_desc buck12_voltage_map_desc = { |
| 80 | .min = 750000, .step = 25000, .max = 1525000, |
| 81 | }; |
| 82 | static const struct voltage_map_desc buck3_voltage_map_desc = { |
| 83 | .min = 1600000, .step = 100000, .max = 3600000, |
| 84 | }; |
| 85 | static const struct voltage_map_desc buck4_voltage_map_desc = { |
| 86 | .min = 800000, .step = 100000, .max = 2300000, |
| 87 | }; |
| 88 | |
| 89 | static const struct voltage_map_desc *ldo_voltage_map[] = { |
| 90 | NULL, |
| 91 | NULL, |
| 92 | &ldo23_voltage_map_desc, /* LDO2 */ |
| 93 | &ldo23_voltage_map_desc, /* LDO3 */ |
| 94 | &ldo456711_voltage_map_desc, /* LDO4 */ |
| 95 | &ldo456711_voltage_map_desc, /* LDO5 */ |
| 96 | &ldo456711_voltage_map_desc, /* LDO6 */ |
| 97 | &ldo456711_voltage_map_desc, /* LDO7 */ |
| 98 | &ldo8_voltage_map_desc, /* LDO8 */ |
| 99 | &ldo9_voltage_map_desc, /* LDO9 */ |
| 100 | &ldo10_voltage_map_desc, /* LDO10 */ |
| 101 | &ldo456711_voltage_map_desc, /* LDO11 */ |
| 102 | &ldo1213_voltage_map_desc, /* LDO12 */ |
| 103 | &ldo1213_voltage_map_desc, /* LDO13 */ |
| 104 | &ldo1415_voltage_map_desc, /* LDO14 */ |
| 105 | &ldo1415_voltage_map_desc, /* LDO15 */ |
| 106 | &ldo1617_voltage_map_desc, /* LDO16 */ |
| 107 | &ldo1617_voltage_map_desc, /* LDO17 */ |
| 108 | &buck12_voltage_map_desc, /* BUCK1 */ |
| 109 | &buck12_voltage_map_desc, /* BUCK2 */ |
| 110 | &buck3_voltage_map_desc, /* BUCK3 */ |
| 111 | &buck4_voltage_map_desc, /* BUCK4 */ |
| 112 | }; |
| 113 | |
| 114 | static int max8998_get_enable_register(struct regulator_dev *rdev, |
| 115 | int *reg, int *shift) |
| 116 | { |
| 117 | int ldo = rdev_get_id(rdev); |
| 118 | |
| 119 | switch (ldo) { |
| 120 | case MAX8998_LDO2 ... MAX8998_LDO5: |
| 121 | *reg = MAX8998_REG_ONOFF1; |
| 122 | *shift = 3 - (ldo - MAX8998_LDO2); |
| 123 | break; |
| 124 | case MAX8998_LDO6 ... MAX8998_LDO13: |
| 125 | *reg = MAX8998_REG_ONOFF2; |
| 126 | *shift = 7 - (ldo - MAX8998_LDO6); |
| 127 | break; |
| 128 | case MAX8998_LDO14 ... MAX8998_LDO17: |
| 129 | *reg = MAX8998_REG_ONOFF3; |
| 130 | *shift = 7 - (ldo - MAX8998_LDO14); |
| 131 | break; |
| 132 | case MAX8998_BUCK1 ... MAX8998_BUCK4: |
| 133 | *reg = MAX8998_REG_ONOFF1; |
| 134 | *shift = 7 - (ldo - MAX8998_BUCK1); |
| 135 | break; |
| 136 | case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: |
| 137 | *reg = MAX8998_REG_ONOFF4; |
| 138 | *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); |
| 139 | break; |
| 140 | case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: |
| 141 | *reg = MAX8998_REG_CHGR2; |
| 142 | *shift = 7 - (ldo - MAX8998_ESAFEOUT1); |
| 143 | break; |
| 144 | default: |
| 145 | return -EINVAL; |
| 146 | } |
| 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static int max8998_ldo_is_enabled(struct regulator_dev *rdev) |
| 152 | { |
| 153 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 154 | struct i2c_client *i2c = max8998->iodev->i2c; |
| 155 | int ret, reg, shift = 8; |
| 156 | u8 val; |
| 157 | |
| 158 | ret = max8998_get_enable_register(rdev, ®, &shift); |
| 159 | if (ret) |
| 160 | return ret; |
| 161 | |
| 162 | ret = max8998_read_reg(i2c, reg, &val); |
| 163 | if (ret) |
| 164 | return ret; |
| 165 | |
| 166 | return val & (1 << shift); |
| 167 | } |
| 168 | |
| 169 | static int max8998_ldo_enable(struct regulator_dev *rdev) |
| 170 | { |
| 171 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 172 | struct i2c_client *i2c = max8998->iodev->i2c; |
| 173 | int reg, shift = 8, ret; |
| 174 | |
| 175 | ret = max8998_get_enable_register(rdev, ®, &shift); |
| 176 | if (ret) |
| 177 | return ret; |
| 178 | |
| 179 | return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift); |
| 180 | } |
| 181 | |
| 182 | static int max8998_ldo_disable(struct regulator_dev *rdev) |
| 183 | { |
| 184 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 185 | struct i2c_client *i2c = max8998->iodev->i2c; |
| 186 | int reg, shift = 8, ret; |
| 187 | |
| 188 | ret = max8998_get_enable_register(rdev, ®, &shift); |
| 189 | if (ret) |
| 190 | return ret; |
| 191 | |
| 192 | return max8998_update_reg(i2c, reg, 0, 1<<shift); |
| 193 | } |
| 194 | |
| 195 | static int max8998_get_voltage_register(struct regulator_dev *rdev, |
| 196 | int *_reg, int *_shift, int *_mask) |
| 197 | { |
| 198 | int ldo = rdev_get_id(rdev); |
| 199 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 200 | int reg, shift = 0, mask = 0xff; |
| 201 | |
| 202 | switch (ldo) { |
| 203 | case MAX8998_LDO2 ... MAX8998_LDO3: |
| 204 | reg = MAX8998_REG_LDO2_LDO3; |
| 205 | mask = 0xf; |
| 206 | if (ldo == MAX8998_LDO2) |
| 207 | shift = 4; |
| 208 | else |
| 209 | shift = 0; |
| 210 | break; |
| 211 | case MAX8998_LDO4 ... MAX8998_LDO7: |
| 212 | reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4); |
| 213 | break; |
| 214 | case MAX8998_LDO8 ... MAX8998_LDO9: |
| 215 | reg = MAX8998_REG_LDO8_LDO9; |
| 216 | mask = 0xf; |
| 217 | if (ldo == MAX8998_LDO8) |
| 218 | shift = 4; |
| 219 | else |
| 220 | shift = 0; |
| 221 | break; |
| 222 | case MAX8998_LDO10 ... MAX8998_LDO11: |
| 223 | reg = MAX8998_REG_LDO10_LDO11; |
| 224 | if (ldo == MAX8998_LDO10) { |
| 225 | shift = 5; |
| 226 | mask = 0x7; |
| 227 | } else { |
| 228 | shift = 0; |
| 229 | mask = 0x1f; |
| 230 | } |
| 231 | break; |
| 232 | case MAX8998_LDO12 ... MAX8998_LDO17: |
| 233 | reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12); |
| 234 | break; |
| 235 | case MAX8998_BUCK1: |
| 236 | reg = MAX8998_REG_BUCK1_VOLTAGE1 + max8998->buck1_idx; |
| 237 | break; |
| 238 | case MAX8998_BUCK2: |
| 239 | reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; |
| 240 | break; |
| 241 | case MAX8998_BUCK3: |
| 242 | reg = MAX8998_REG_BUCK3; |
| 243 | break; |
| 244 | case MAX8998_BUCK4: |
| 245 | reg = MAX8998_REG_BUCK4; |
| 246 | break; |
| 247 | default: |
| 248 | return -EINVAL; |
| 249 | } |
| 250 | |
| 251 | *_reg = reg; |
| 252 | *_shift = shift; |
| 253 | *_mask = mask; |
| 254 | |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static int max8998_get_voltage_sel(struct regulator_dev *rdev) |
| 259 | { |
| 260 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 261 | struct i2c_client *i2c = max8998->iodev->i2c; |
| 262 | int reg, shift = 0, mask, ret; |
| 263 | u8 val; |
| 264 | |
| 265 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
| 266 | if (ret) |
| 267 | return ret; |
| 268 | |
| 269 | ret = max8998_read_reg(i2c, reg, &val); |
| 270 | if (ret) |
| 271 | return ret; |
| 272 | |
| 273 | val >>= shift; |
| 274 | val &= mask; |
| 275 | |
| 276 | return val; |
| 277 | } |
| 278 | |
| 279 | static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, |
| 280 | unsigned selector) |
| 281 | { |
| 282 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 283 | struct i2c_client *i2c = max8998->iodev->i2c; |
| 284 | int reg, shift = 0, mask, ret; |
| 285 | |
| 286 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
| 287 | if (ret) |
| 288 | return ret; |
| 289 | |
| 290 | ret = max8998_update_reg(i2c, reg, selector<<shift, mask<<shift); |
| 291 | |
| 292 | return ret; |
| 293 | } |
| 294 | |
| 295 | static inline void buck1_gpio_set(int gpio1, int gpio2, int v) |
| 296 | { |
| 297 | gpio_set_value(gpio1, v & 0x1); |
| 298 | gpio_set_value(gpio2, (v >> 1) & 0x1); |
| 299 | } |
| 300 | |
| 301 | static inline void buck2_gpio_set(int gpio, int v) |
| 302 | { |
| 303 | gpio_set_value(gpio, v & 0x1); |
| 304 | } |
| 305 | |
| 306 | static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, |
| 307 | unsigned selector) |
| 308 | { |
| 309 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 310 | struct max8998_platform_data *pdata = |
| 311 | dev_get_platdata(max8998->iodev->dev); |
| 312 | struct i2c_client *i2c = max8998->iodev->i2c; |
| 313 | int buck = rdev_get_id(rdev); |
| 314 | int reg, shift = 0, mask, ret, j; |
| 315 | static u8 buck1_last_val; |
| 316 | |
| 317 | ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); |
| 318 | if (ret) |
| 319 | return ret; |
| 320 | |
| 321 | switch (buck) { |
| 322 | case MAX8998_BUCK1: |
| 323 | dev_dbg(max8998->dev, |
| 324 | "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" |
| 325 | "buck1_vol3:%d, buck1_vol4:%d\n", |
| 326 | selector, max8998->buck1_vol[0], max8998->buck1_vol[1], |
| 327 | max8998->buck1_vol[2], max8998->buck1_vol[3]); |
| 328 | |
| 329 | if (gpio_is_valid(pdata->buck1_set1) && |
| 330 | gpio_is_valid(pdata->buck1_set2)) { |
| 331 | |
| 332 | /* check if requested voltage */ |
| 333 | /* value is already defined */ |
| 334 | for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { |
| 335 | if (max8998->buck1_vol[j] == selector) { |
| 336 | max8998->buck1_idx = j; |
| 337 | buck1_gpio_set(pdata->buck1_set1, |
| 338 | pdata->buck1_set2, j); |
| 339 | goto buck1_exit; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | if (pdata->buck_voltage_lock) |
| 344 | return -EINVAL; |
| 345 | |
| 346 | /* no predefine regulator found */ |
| 347 | max8998->buck1_idx = (buck1_last_val % 2) + 2; |
| 348 | dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", |
| 349 | max8998->buck1_idx); |
| 350 | max8998->buck1_vol[max8998->buck1_idx] = selector; |
| 351 | ret = max8998_get_voltage_register(rdev, ®, |
| 352 | &shift, |
| 353 | &mask); |
| 354 | ret = max8998_write_reg(i2c, reg, selector); |
| 355 | buck1_gpio_set(pdata->buck1_set1, |
| 356 | pdata->buck1_set2, max8998->buck1_idx); |
| 357 | buck1_last_val++; |
| 358 | buck1_exit: |
| 359 | dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", |
| 360 | i2c->name, gpio_get_value(pdata->buck1_set1), |
| 361 | gpio_get_value(pdata->buck1_set2)); |
| 362 | break; |
| 363 | } else { |
| 364 | ret = max8998_write_reg(i2c, reg, selector); |
| 365 | } |
| 366 | break; |
| 367 | |
| 368 | case MAX8998_BUCK2: |
| 369 | dev_dbg(max8998->dev, |
| 370 | "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", |
| 371 | selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); |
| 372 | if (gpio_is_valid(pdata->buck2_set3)) { |
| 373 | |
| 374 | /* check if requested voltage */ |
| 375 | /* value is already defined */ |
| 376 | for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { |
| 377 | if (max8998->buck2_vol[j] == selector) { |
| 378 | max8998->buck2_idx = j; |
| 379 | buck2_gpio_set(pdata->buck2_set3, j); |
| 380 | goto buck2_exit; |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | if (pdata->buck_voltage_lock) |
| 385 | return -EINVAL; |
| 386 | |
| 387 | max8998_get_voltage_register(rdev, |
| 388 | ®, &shift, &mask); |
| 389 | ret = max8998_write_reg(i2c, reg, selector); |
| 390 | max8998->buck2_vol[max8998->buck2_idx] = selector; |
| 391 | buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); |
| 392 | buck2_exit: |
| 393 | dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, |
| 394 | gpio_get_value(pdata->buck2_set3)); |
| 395 | } else { |
| 396 | ret = max8998_write_reg(i2c, reg, selector); |
| 397 | } |
| 398 | break; |
| 399 | |
| 400 | case MAX8998_BUCK3: |
| 401 | case MAX8998_BUCK4: |
| 402 | ret = max8998_update_reg(i2c, reg, selector<<shift, |
| 403 | mask<<shift); |
| 404 | break; |
| 405 | } |
| 406 | |
| 407 | return ret; |
| 408 | } |
| 409 | |
| 410 | static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
| 411 | unsigned int old_selector, |
| 412 | unsigned int new_selector) |
| 413 | { |
| 414 | struct max8998_data *max8998 = rdev_get_drvdata(rdev); |
| 415 | struct i2c_client *i2c = max8998->iodev->i2c; |
| 416 | const struct voltage_map_desc *desc; |
| 417 | int buck = rdev_get_id(rdev); |
| 418 | u8 val = 0; |
| 419 | int difference, ret; |
| 420 | |
| 421 | if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) |
| 422 | return -EINVAL; |
| 423 | |
| 424 | desc = ldo_voltage_map[buck]; |
| 425 | |
| 426 | /* Voltage stabilization */ |
| 427 | ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); |
| 428 | if (ret) |
| 429 | return ret; |
| 430 | |
| 431 | /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ |
| 432 | /* MAX8998 has ENRAMP bit implemented, so test it*/ |
| 433 | if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) |
| 434 | return 0; |
| 435 | |
| 436 | difference = (new_selector - old_selector) * desc->step / 1000; |
| 437 | if (difference > 0) |
| 438 | return DIV_ROUND_UP(difference, (val & 0x0f) + 1); |
| 439 | |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | static 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 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 struct regulator_ops max8998_others_ops = { |
| 465 | .is_enabled = max8998_ldo_is_enabled, |
| 466 | .enable = max8998_ldo_enable, |
| 467 | .disable = max8998_ldo_disable, |
| 468 | }; |
| 469 | |
| 470 | static struct regulator_desc regulators[] = { |
| 471 | { |
| 472 | .name = "LDO2", |
| 473 | .id = MAX8998_LDO2, |
| 474 | .ops = &max8998_ldo_ops, |
| 475 | .type = REGULATOR_VOLTAGE, |
| 476 | .owner = THIS_MODULE, |
| 477 | }, { |
| 478 | .name = "LDO3", |
| 479 | .id = MAX8998_LDO3, |
| 480 | .ops = &max8998_ldo_ops, |
| 481 | .type = REGULATOR_VOLTAGE, |
| 482 | .owner = THIS_MODULE, |
| 483 | }, { |
| 484 | .name = "LDO4", |
| 485 | .id = MAX8998_LDO4, |
| 486 | .ops = &max8998_ldo_ops, |
| 487 | .type = REGULATOR_VOLTAGE, |
| 488 | .owner = THIS_MODULE, |
| 489 | }, { |
| 490 | .name = "LDO5", |
| 491 | .id = MAX8998_LDO5, |
| 492 | .ops = &max8998_ldo_ops, |
| 493 | .type = REGULATOR_VOLTAGE, |
| 494 | .owner = THIS_MODULE, |
| 495 | }, { |
| 496 | .name = "LDO6", |
| 497 | .id = MAX8998_LDO6, |
| 498 | .ops = &max8998_ldo_ops, |
| 499 | .type = REGULATOR_VOLTAGE, |
| 500 | .owner = THIS_MODULE, |
| 501 | }, { |
| 502 | .name = "LDO7", |
| 503 | .id = MAX8998_LDO7, |
| 504 | .ops = &max8998_ldo_ops, |
| 505 | .type = REGULATOR_VOLTAGE, |
| 506 | .owner = THIS_MODULE, |
| 507 | }, { |
| 508 | .name = "LDO8", |
| 509 | .id = MAX8998_LDO8, |
| 510 | .ops = &max8998_ldo_ops, |
| 511 | .type = REGULATOR_VOLTAGE, |
| 512 | .owner = THIS_MODULE, |
| 513 | }, { |
| 514 | .name = "LDO9", |
| 515 | .id = MAX8998_LDO9, |
| 516 | .ops = &max8998_ldo_ops, |
| 517 | .type = REGULATOR_VOLTAGE, |
| 518 | .owner = THIS_MODULE, |
| 519 | }, { |
| 520 | .name = "LDO10", |
| 521 | .id = MAX8998_LDO10, |
| 522 | .ops = &max8998_ldo_ops, |
| 523 | .type = REGULATOR_VOLTAGE, |
| 524 | .owner = THIS_MODULE, |
| 525 | }, { |
| 526 | .name = "LDO11", |
| 527 | .id = MAX8998_LDO11, |
| 528 | .ops = &max8998_ldo_ops, |
| 529 | .type = REGULATOR_VOLTAGE, |
| 530 | .owner = THIS_MODULE, |
| 531 | }, { |
| 532 | .name = "LDO12", |
| 533 | .id = MAX8998_LDO12, |
| 534 | .ops = &max8998_ldo_ops, |
| 535 | .type = REGULATOR_VOLTAGE, |
| 536 | .owner = THIS_MODULE, |
| 537 | }, { |
| 538 | .name = "LDO13", |
| 539 | .id = MAX8998_LDO13, |
| 540 | .ops = &max8998_ldo_ops, |
| 541 | .type = REGULATOR_VOLTAGE, |
| 542 | .owner = THIS_MODULE, |
| 543 | }, { |
| 544 | .name = "LDO14", |
| 545 | .id = MAX8998_LDO14, |
| 546 | .ops = &max8998_ldo_ops, |
| 547 | .type = REGULATOR_VOLTAGE, |
| 548 | .owner = THIS_MODULE, |
| 549 | }, { |
| 550 | .name = "LDO15", |
| 551 | .id = MAX8998_LDO15, |
| 552 | .ops = &max8998_ldo_ops, |
| 553 | .type = REGULATOR_VOLTAGE, |
| 554 | .owner = THIS_MODULE, |
| 555 | }, { |
| 556 | .name = "LDO16", |
| 557 | .id = MAX8998_LDO16, |
| 558 | .ops = &max8998_ldo_ops, |
| 559 | .type = REGULATOR_VOLTAGE, |
| 560 | .owner = THIS_MODULE, |
| 561 | }, { |
| 562 | .name = "LDO17", |
| 563 | .id = MAX8998_LDO17, |
| 564 | .ops = &max8998_ldo_ops, |
| 565 | .type = REGULATOR_VOLTAGE, |
| 566 | .owner = THIS_MODULE, |
| 567 | }, { |
| 568 | .name = "BUCK1", |
| 569 | .id = MAX8998_BUCK1, |
| 570 | .ops = &max8998_buck_ops, |
| 571 | .type = REGULATOR_VOLTAGE, |
| 572 | .owner = THIS_MODULE, |
| 573 | }, { |
| 574 | .name = "BUCK2", |
| 575 | .id = MAX8998_BUCK2, |
| 576 | .ops = &max8998_buck_ops, |
| 577 | .type = REGULATOR_VOLTAGE, |
| 578 | .owner = THIS_MODULE, |
| 579 | }, { |
| 580 | .name = "BUCK3", |
| 581 | .id = MAX8998_BUCK3, |
| 582 | .ops = &max8998_buck_ops, |
| 583 | .type = REGULATOR_VOLTAGE, |
| 584 | .owner = THIS_MODULE, |
| 585 | }, { |
| 586 | .name = "BUCK4", |
| 587 | .id = MAX8998_BUCK4, |
| 588 | .ops = &max8998_buck_ops, |
| 589 | .type = REGULATOR_VOLTAGE, |
| 590 | .owner = THIS_MODULE, |
| 591 | }, { |
| 592 | .name = "EN32KHz AP", |
| 593 | .id = MAX8998_EN32KHZ_AP, |
| 594 | .ops = &max8998_others_ops, |
| 595 | .type = REGULATOR_VOLTAGE, |
| 596 | .owner = THIS_MODULE, |
| 597 | }, { |
| 598 | .name = "EN32KHz CP", |
| 599 | .id = MAX8998_EN32KHZ_CP, |
| 600 | .ops = &max8998_others_ops, |
| 601 | .type = REGULATOR_VOLTAGE, |
| 602 | .owner = THIS_MODULE, |
| 603 | }, { |
| 604 | .name = "ENVICHG", |
| 605 | .id = MAX8998_ENVICHG, |
| 606 | .ops = &max8998_others_ops, |
| 607 | .type = REGULATOR_VOLTAGE, |
| 608 | .owner = THIS_MODULE, |
| 609 | }, { |
| 610 | .name = "ESAFEOUT1", |
| 611 | .id = MAX8998_ESAFEOUT1, |
| 612 | .ops = &max8998_others_ops, |
| 613 | .type = REGULATOR_VOLTAGE, |
| 614 | .owner = THIS_MODULE, |
| 615 | }, { |
| 616 | .name = "ESAFEOUT2", |
| 617 | .id = MAX8998_ESAFEOUT2, |
| 618 | .ops = &max8998_others_ops, |
| 619 | .type = REGULATOR_VOLTAGE, |
| 620 | .owner = THIS_MODULE, |
| 621 | } |
| 622 | }; |
| 623 | |
| 624 | static int max8998_pmic_probe(struct platform_device *pdev) |
| 625 | { |
| 626 | struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
| 627 | struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev); |
| 628 | struct regulator_config config = { }; |
| 629 | struct regulator_dev **rdev; |
| 630 | struct max8998_data *max8998; |
| 631 | struct i2c_client *i2c; |
| 632 | int i, ret, size; |
| 633 | |
| 634 | if (!pdata) { |
| 635 | dev_err(pdev->dev.parent, "No platform init data supplied\n"); |
| 636 | return -ENODEV; |
| 637 | } |
| 638 | |
| 639 | max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), |
| 640 | GFP_KERNEL); |
| 641 | if (!max8998) |
| 642 | return -ENOMEM; |
| 643 | |
| 644 | size = sizeof(struct regulator_dev *) * pdata->num_regulators; |
| 645 | max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); |
| 646 | if (!max8998->rdev) |
| 647 | return -ENOMEM; |
| 648 | |
| 649 | rdev = max8998->rdev; |
| 650 | max8998->dev = &pdev->dev; |
| 651 | max8998->iodev = iodev; |
| 652 | max8998->num_regulators = pdata->num_regulators; |
| 653 | platform_set_drvdata(pdev, max8998); |
| 654 | i2c = max8998->iodev->i2c; |
| 655 | |
| 656 | max8998->buck1_idx = pdata->buck1_default_idx; |
| 657 | max8998->buck2_idx = pdata->buck2_default_idx; |
| 658 | |
| 659 | /* NOTE: */ |
| 660 | /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ |
| 661 | /* will be displayed */ |
| 662 | |
| 663 | /* Check if MAX8998 voltage selection GPIOs are defined */ |
| 664 | if (gpio_is_valid(pdata->buck1_set1) && |
| 665 | gpio_is_valid(pdata->buck1_set2)) { |
| 666 | /* Check if SET1 is not equal to 0 */ |
| 667 | if (!pdata->buck1_set1) { |
| 668 | dev_err(&pdev->dev, |
| 669 | "MAX8998 SET1 GPIO defined as 0 !\n"); |
| 670 | WARN_ON(!pdata->buck1_set1); |
| 671 | ret = -EIO; |
| 672 | goto err_out; |
| 673 | } |
| 674 | /* Check if SET2 is not equal to 0 */ |
| 675 | if (!pdata->buck1_set2) { |
| 676 | dev_err(&pdev->dev, |
| 677 | "MAX8998 SET2 GPIO defined as 0 !\n"); |
| 678 | WARN_ON(!pdata->buck1_set2); |
| 679 | ret = -EIO; |
| 680 | goto err_out; |
| 681 | } |
| 682 | |
| 683 | gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); |
| 684 | gpio_direction_output(pdata->buck1_set1, |
| 685 | max8998->buck1_idx & 0x1); |
| 686 | |
| 687 | |
| 688 | gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); |
| 689 | gpio_direction_output(pdata->buck1_set2, |
| 690 | (max8998->buck1_idx >> 1) & 0x1); |
| 691 | /* Set predefined value for BUCK1 register 1 */ |
| 692 | i = 0; |
| 693 | while (buck12_voltage_map_desc.min + |
| 694 | buck12_voltage_map_desc.step*i |
| 695 | < pdata->buck1_voltage1) |
| 696 | i++; |
| 697 | max8998->buck1_vol[0] = i; |
| 698 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i); |
| 699 | if (ret) |
| 700 | goto err_out; |
| 701 | |
| 702 | /* Set predefined value for BUCK1 register 2 */ |
| 703 | i = 0; |
| 704 | while (buck12_voltage_map_desc.min + |
| 705 | buck12_voltage_map_desc.step*i |
| 706 | < pdata->buck1_voltage2) |
| 707 | i++; |
| 708 | |
| 709 | max8998->buck1_vol[1] = i; |
| 710 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i); |
| 711 | if (ret) |
| 712 | goto err_out; |
| 713 | |
| 714 | /* Set predefined value for BUCK1 register 3 */ |
| 715 | i = 0; |
| 716 | while (buck12_voltage_map_desc.min + |
| 717 | buck12_voltage_map_desc.step*i |
| 718 | < pdata->buck1_voltage3) |
| 719 | i++; |
| 720 | |
| 721 | max8998->buck1_vol[2] = i; |
| 722 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i); |
| 723 | if (ret) |
| 724 | goto err_out; |
| 725 | |
| 726 | /* Set predefined value for BUCK1 register 4 */ |
| 727 | i = 0; |
| 728 | while (buck12_voltage_map_desc.min + |
| 729 | buck12_voltage_map_desc.step*i |
| 730 | < pdata->buck1_voltage4) |
| 731 | i++; |
| 732 | |
| 733 | max8998->buck1_vol[3] = i; |
| 734 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i); |
| 735 | if (ret) |
| 736 | goto err_out; |
| 737 | |
| 738 | } |
| 739 | |
| 740 | if (gpio_is_valid(pdata->buck2_set3)) { |
| 741 | /* Check if SET3 is not equal to 0 */ |
| 742 | if (!pdata->buck2_set3) { |
| 743 | dev_err(&pdev->dev, |
| 744 | "MAX8998 SET3 GPIO defined as 0 !\n"); |
| 745 | WARN_ON(!pdata->buck2_set3); |
| 746 | ret = -EIO; |
| 747 | goto err_out; |
| 748 | } |
| 749 | gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); |
| 750 | gpio_direction_output(pdata->buck2_set3, |
| 751 | max8998->buck2_idx & 0x1); |
| 752 | |
| 753 | /* BUCK2 register 1 */ |
| 754 | i = 0; |
| 755 | while (buck12_voltage_map_desc.min + |
| 756 | buck12_voltage_map_desc.step*i |
| 757 | < pdata->buck2_voltage1) |
| 758 | i++; |
| 759 | max8998->buck2_vol[0] = i; |
| 760 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i); |
| 761 | if (ret) |
| 762 | goto err_out; |
| 763 | |
| 764 | /* BUCK2 register 2 */ |
| 765 | i = 0; |
| 766 | while (buck12_voltage_map_desc.min + |
| 767 | buck12_voltage_map_desc.step*i |
| 768 | < pdata->buck2_voltage2) |
| 769 | i++; |
| 770 | max8998->buck2_vol[1] = i; |
| 771 | ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i); |
| 772 | if (ret) |
| 773 | goto err_out; |
| 774 | } |
| 775 | |
| 776 | for (i = 0; i < pdata->num_regulators; i++) { |
| 777 | const struct voltage_map_desc *desc; |
| 778 | int id = pdata->regulators[i].id; |
| 779 | int index = id - MAX8998_LDO2; |
| 780 | |
| 781 | desc = ldo_voltage_map[id]; |
| 782 | if (desc && regulators[index].ops != &max8998_others_ops) { |
| 783 | int count = (desc->max - desc->min) / desc->step + 1; |
| 784 | |
| 785 | regulators[index].n_voltages = count; |
| 786 | regulators[index].min_uV = desc->min; |
| 787 | regulators[index].uV_step = desc->step; |
| 788 | } |
| 789 | |
| 790 | config.dev = max8998->dev; |
| 791 | config.init_data = pdata->regulators[i].initdata; |
| 792 | config.driver_data = max8998; |
| 793 | |
| 794 | rdev[i] = regulator_register(®ulators[index], &config); |
| 795 | if (IS_ERR(rdev[i])) { |
| 796 | ret = PTR_ERR(rdev[i]); |
| 797 | dev_err(max8998->dev, "regulator init failed\n"); |
| 798 | rdev[i] = NULL; |
| 799 | goto err; |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | |
| 804 | return 0; |
| 805 | err: |
| 806 | while (--i >= 0) |
| 807 | regulator_unregister(rdev[i]); |
| 808 | err_out: |
| 809 | return ret; |
| 810 | } |
| 811 | |
| 812 | static int max8998_pmic_remove(struct platform_device *pdev) |
| 813 | { |
| 814 | struct max8998_data *max8998 = platform_get_drvdata(pdev); |
| 815 | struct regulator_dev **rdev = max8998->rdev; |
| 816 | int i; |
| 817 | |
| 818 | for (i = 0; i < max8998->num_regulators; i++) |
| 819 | regulator_unregister(rdev[i]); |
| 820 | return 0; |
| 821 | } |
| 822 | |
| 823 | static const struct platform_device_id max8998_pmic_id[] = { |
| 824 | { "max8998-pmic", TYPE_MAX8998 }, |
| 825 | { "lp3974-pmic", TYPE_LP3974 }, |
| 826 | { } |
| 827 | }; |
| 828 | MODULE_DEVICE_TABLE(platform, max8998_pmic_id); |
| 829 | |
| 830 | static struct platform_driver max8998_pmic_driver = { |
| 831 | .driver = { |
| 832 | .name = "max8998-pmic", |
| 833 | .owner = THIS_MODULE, |
| 834 | }, |
| 835 | .probe = max8998_pmic_probe, |
| 836 | .remove = max8998_pmic_remove, |
| 837 | .id_table = max8998_pmic_id, |
| 838 | }; |
| 839 | |
| 840 | static int __init max8998_pmic_init(void) |
| 841 | { |
| 842 | return platform_driver_register(&max8998_pmic_driver); |
| 843 | } |
| 844 | subsys_initcall(max8998_pmic_init); |
| 845 | |
| 846 | static void __exit max8998_pmic_cleanup(void) |
| 847 | { |
| 848 | platform_driver_unregister(&max8998_pmic_driver); |
| 849 | } |
| 850 | module_exit(max8998_pmic_cleanup); |
| 851 | |
| 852 | MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); |
| 853 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); |
| 854 | MODULE_LICENSE("GPL"); |