1 /* 2 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/err.h> 22 #include <linux/of.h> 23 #include <linux/of_device.h> 24 #include <linux/regulator/of_regulator.h> 25 #include <linux/platform_device.h> 26 #include <linux/regulator/driver.h> 27 #include <linux/regulator/machine.h> 28 #include <linux/regulator/pfuze100.h> 29 #include <linux/i2c.h> 30 #include <linux/slab.h> 31 #include <linux/regmap.h> 32 33 #define PFUZE_NUMREGS 128 34 #define PFUZE100_VOL_OFFSET 0 35 #define PFUZE100_STANDBY_OFFSET 1 36 #define PFUZE100_MODE_OFFSET 3 37 #define PFUZE100_CONF_OFFSET 4 38 39 #define PFUZE100_DEVICEID 0x0 40 #define PFUZE100_REVID 0x3 41 #define PFUZE100_FABID 0x4 42 43 #define PFUZE100_SW1ABVOL 0x20 44 #define PFUZE100_SW1CVOL 0x2e 45 #define PFUZE100_SW2VOL 0x35 46 #define PFUZE100_SW3AVOL 0x3c 47 #define PFUZE100_SW3BVOL 0x43 48 #define PFUZE100_SW4VOL 0x4a 49 #define PFUZE100_SWBSTCON1 0x66 50 #define PFUZE100_VREFDDRCON 0x6a 51 #define PFUZE100_VSNVSVOL 0x6b 52 #define PFUZE100_VGEN1VOL 0x6c 53 #define PFUZE100_VGEN2VOL 0x6d 54 #define PFUZE100_VGEN3VOL 0x6e 55 #define PFUZE100_VGEN4VOL 0x6f 56 #define PFUZE100_VGEN5VOL 0x70 57 #define PFUZE100_VGEN6VOL 0x71 58 59 struct pfuze_regulator { 60 struct regulator_desc desc; 61 unsigned char stby_reg; 62 unsigned char stby_mask; 63 }; 64 65 struct pfuze_chip { 66 struct regmap *regmap; 67 struct device *dev; 68 struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR]; 69 struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR]; 70 }; 71 72 static const int pfuze100_swbst[] = { 73 5000000, 5050000, 5100000, 5150000, 74 }; 75 76 static const int pfuze100_vsnvs[] = { 77 1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000, 78 }; 79 80 static const struct i2c_device_id pfuze_device_id[] = { 81 {.name = "pfuze100"}, 82 {}, 83 }; 84 MODULE_DEVICE_TABLE(i2c, pfuze_device_id); 85 86 static const struct of_device_id pfuze_dt_ids[] = { 87 { .compatible = "fsl,pfuze100" }, 88 {}, 89 }; 90 MODULE_DEVICE_TABLE(of, pfuze_dt_ids); 91 92 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) 93 { 94 struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev); 95 int id = rdev->desc->id; 96 unsigned int ramp_bits; 97 int ret; 98 99 if (id < PFUZE100_SWBST) { 100 ramp_delay = 12500 / ramp_delay; 101 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3); 102 ret = regmap_update_bits(pfuze100->regmap, 103 rdev->desc->vsel_reg + 4, 104 0xc0, ramp_bits << 6); 105 if (ret < 0) 106 dev_err(pfuze100->dev, "ramp failed, err %d\n", ret); 107 } else 108 ret = -EACCES; 109 110 return ret; 111 } 112 113 static struct regulator_ops pfuze100_ldo_regulator_ops = { 114 .enable = regulator_enable_regmap, 115 .disable = regulator_disable_regmap, 116 .is_enabled = regulator_is_enabled_regmap, 117 .list_voltage = regulator_list_voltage_linear, 118 .set_voltage_sel = regulator_set_voltage_sel_regmap, 119 .get_voltage_sel = regulator_get_voltage_sel_regmap, 120 }; 121 122 static struct regulator_ops pfuze100_fixed_regulator_ops = { 123 .list_voltage = regulator_list_voltage_linear, 124 }; 125 126 static struct regulator_ops pfuze100_sw_regulator_ops = { 127 .list_voltage = regulator_list_voltage_linear, 128 .set_voltage_sel = regulator_set_voltage_sel_regmap, 129 .get_voltage_sel = regulator_get_voltage_sel_regmap, 130 .set_voltage_time_sel = regulator_set_voltage_time_sel, 131 .set_ramp_delay = pfuze100_set_ramp_delay, 132 }; 133 134 static struct regulator_ops pfuze100_swb_regulator_ops = { 135 .list_voltage = regulator_list_voltage_table, 136 .map_voltage = regulator_map_voltage_ascend, 137 .set_voltage_sel = regulator_set_voltage_sel_regmap, 138 .get_voltage_sel = regulator_get_voltage_sel_regmap, 139 140 }; 141 142 #define PFUZE100_FIXED_REG(_name, base, voltage) \ 143 [PFUZE100_ ## _name] = { \ 144 .desc = { \ 145 .name = #_name, \ 146 .n_voltages = 1, \ 147 .ops = &pfuze100_fixed_regulator_ops, \ 148 .type = REGULATOR_VOLTAGE, \ 149 .id = PFUZE100_ ## _name, \ 150 .owner = THIS_MODULE, \ 151 .min_uV = (voltage), \ 152 .enable_reg = (base), \ 153 .enable_mask = 0x10, \ 154 }, \ 155 } 156 157 #define PFUZE100_SW_REG(_name, base, min, max, step) \ 158 [PFUZE100_ ## _name] = { \ 159 .desc = { \ 160 .name = #_name,\ 161 .n_voltages = ((max) - (min)) / (step) + 1, \ 162 .ops = &pfuze100_sw_regulator_ops, \ 163 .type = REGULATOR_VOLTAGE, \ 164 .id = PFUZE100_ ## _name, \ 165 .owner = THIS_MODULE, \ 166 .min_uV = (min), \ 167 .uV_step = (step), \ 168 .vsel_reg = (base) + PFUZE100_VOL_OFFSET, \ 169 .vsel_mask = 0x3f, \ 170 }, \ 171 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \ 172 .stby_mask = 0x3f, \ 173 } 174 175 #define PFUZE100_SWB_REG(_name, base, mask, voltages) \ 176 [PFUZE100_ ## _name] = { \ 177 .desc = { \ 178 .name = #_name, \ 179 .n_voltages = ARRAY_SIZE(voltages), \ 180 .ops = &pfuze100_swb_regulator_ops, \ 181 .type = REGULATOR_VOLTAGE, \ 182 .id = PFUZE100_ ## _name, \ 183 .owner = THIS_MODULE, \ 184 .volt_table = voltages, \ 185 .vsel_reg = (base), \ 186 .vsel_mask = (mask), \ 187 }, \ 188 } 189 190 #define PFUZE100_VGEN_REG(_name, base, min, max, step) \ 191 [PFUZE100_ ## _name] = { \ 192 .desc = { \ 193 .name = #_name, \ 194 .n_voltages = ((max) - (min)) / (step) + 1, \ 195 .ops = &pfuze100_ldo_regulator_ops, \ 196 .type = REGULATOR_VOLTAGE, \ 197 .id = PFUZE100_ ## _name, \ 198 .owner = THIS_MODULE, \ 199 .min_uV = (min), \ 200 .uV_step = (step), \ 201 .vsel_reg = (base), \ 202 .vsel_mask = 0xf, \ 203 .enable_reg = (base), \ 204 .enable_mask = 0x10, \ 205 }, \ 206 .stby_reg = (base), \ 207 .stby_mask = 0x20, \ 208 } 209 210 static struct pfuze_regulator pfuze100_regulators[] = { 211 PFUZE100_SW_REG(SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000), 212 PFUZE100_SW_REG(SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000), 213 PFUZE100_SW_REG(SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000), 214 PFUZE100_SW_REG(SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000), 215 PFUZE100_SW_REG(SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000), 216 PFUZE100_SW_REG(SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000), 217 PFUZE100_SWB_REG(SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst), 218 PFUZE100_SWB_REG(VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs), 219 PFUZE100_FIXED_REG(VREFDDR, PFUZE100_VREFDDRCON, 750000), 220 PFUZE100_VGEN_REG(VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000), 221 PFUZE100_VGEN_REG(VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000), 222 PFUZE100_VGEN_REG(VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000), 223 PFUZE100_VGEN_REG(VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000), 224 PFUZE100_VGEN_REG(VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000), 225 PFUZE100_VGEN_REG(VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000), 226 }; 227 228 #ifdef CONFIG_OF 229 static struct of_regulator_match pfuze100_matches[] = { 230 { .name = "sw1ab", }, 231 { .name = "sw1c", }, 232 { .name = "sw2", }, 233 { .name = "sw3a", }, 234 { .name = "sw3b", }, 235 { .name = "sw4", }, 236 { .name = "swbst", }, 237 { .name = "vsnvs", }, 238 { .name = "vrefddr", }, 239 { .name = "vgen1", }, 240 { .name = "vgen2", }, 241 { .name = "vgen3", }, 242 { .name = "vgen4", }, 243 { .name = "vgen5", }, 244 { .name = "vgen6", }, 245 }; 246 247 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip) 248 { 249 struct device *dev = chip->dev; 250 struct device_node *np, *parent; 251 int ret; 252 253 np = of_node_get(dev->parent->of_node); 254 if (!np) 255 return 0; 256 257 parent = of_find_node_by_name(np, "regulators"); 258 if (!parent) { 259 dev_err(dev, "regulators node not found\n"); 260 return -EINVAL; 261 } 262 263 ret = of_regulator_match(dev, parent, pfuze100_matches, 264 ARRAY_SIZE(pfuze100_matches)); 265 266 of_node_put(parent); 267 if (ret < 0) { 268 dev_err(dev, "Error parsing regulator init data: %d\n", 269 ret); 270 return ret; 271 } 272 273 return 0; 274 } 275 276 static inline struct regulator_init_data *match_init_data(int index) 277 { 278 return pfuze100_matches[index].init_data; 279 } 280 281 static inline struct device_node *match_of_node(int index) 282 { 283 return pfuze100_matches[index].of_node; 284 } 285 #else 286 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip) 287 { 288 return 0; 289 } 290 291 static inline struct regulator_init_data *match_init_data(int index) 292 { 293 return NULL; 294 } 295 296 static inline struct device_node *match_of_node(int index) 297 { 298 return NULL; 299 } 300 #endif 301 302 static int pfuze_identify(struct pfuze_chip *pfuze_chip) 303 { 304 unsigned int value; 305 int ret; 306 307 ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value); 308 if (ret) 309 return ret; 310 311 switch (value & 0x0f) { 312 /* Freescale misprogrammed 1-3% of parts prior to week 8 of 2013 as ID=8 */ 313 case 0x8: 314 dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8"); 315 case 0x0: 316 break; 317 default: 318 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value); 319 return -ENODEV; 320 } 321 322 ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value); 323 if (ret) 324 return ret; 325 dev_info(pfuze_chip->dev, 326 "Full lay: %x, Metal lay: %x\n", 327 (value & 0xf0) >> 4, value & 0x0f); 328 329 ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value); 330 if (ret) 331 return ret; 332 dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n", 333 (value & 0xc) >> 2, value & 0x3); 334 335 return 0; 336 } 337 338 static const struct regmap_config pfuze_regmap_config = { 339 .reg_bits = 8, 340 .val_bits = 8, 341 .max_register = PFUZE_NUMREGS - 1, 342 .cache_type = REGCACHE_RBTREE, 343 }; 344 345 static int pfuze100_regulator_probe(struct i2c_client *client, 346 const struct i2c_device_id *id) 347 { 348 struct pfuze_chip *pfuze_chip; 349 struct pfuze_regulator_platform_data *pdata = 350 dev_get_platdata(&client->dev); 351 struct regulator_config config = { }; 352 int i, ret; 353 354 pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip), 355 GFP_KERNEL); 356 if (!pfuze_chip) 357 return -ENOMEM; 358 359 i2c_set_clientdata(client, pfuze_chip); 360 361 memcpy(pfuze_chip->regulator_descs, pfuze100_regulators, 362 sizeof(pfuze_chip->regulator_descs)); 363 364 pfuze_chip->dev = &client->dev; 365 366 pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config); 367 if (IS_ERR(pfuze_chip->regmap)) { 368 ret = PTR_ERR(pfuze_chip->regmap); 369 dev_err(&client->dev, 370 "regmap allocation failed with err %d\n", ret); 371 return ret; 372 } 373 374 ret = pfuze_identify(pfuze_chip); 375 if (ret) { 376 dev_err(&client->dev, "unrecognized pfuze chip ID!\n"); 377 return ret; 378 } 379 380 ret = pfuze_parse_regulators_dt(pfuze_chip); 381 if (ret) 382 return ret; 383 384 for (i = 0; i < PFUZE100_MAX_REGULATOR; i++) { 385 struct regulator_init_data *init_data; 386 struct regulator_desc *desc; 387 int val; 388 389 desc = &pfuze_chip->regulator_descs[i].desc; 390 391 if (pdata) 392 init_data = pdata->init_data[i]; 393 else 394 init_data = match_init_data(i); 395 396 /* SW2~SW4 high bit check and modify the voltage value table */ 397 if (i > PFUZE100_SW1C && i < PFUZE100_SWBST) { 398 regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val); 399 if (val & 0x40) { 400 desc->min_uV = 800000; 401 desc->uV_step = 50000; 402 desc->n_voltages = 51; 403 } 404 } 405 406 config.dev = &client->dev; 407 config.init_data = init_data; 408 config.driver_data = pfuze_chip; 409 config.of_node = match_of_node(i); 410 411 pfuze_chip->regulators[i] = regulator_register(desc, &config); 412 if (IS_ERR(pfuze_chip->regulators[i])) { 413 dev_err(&client->dev, "register regulator%s failed\n", 414 pfuze100_regulators[i].desc.name); 415 ret = PTR_ERR(pfuze_chip->regulators[i]); 416 while (--i >= 0) 417 regulator_unregister(pfuze_chip->regulators[i]); 418 return ret; 419 } 420 } 421 422 return 0; 423 } 424 425 static int pfuze100_regulator_remove(struct i2c_client *client) 426 { 427 int i; 428 struct pfuze_chip *pfuze_chip = i2c_get_clientdata(client); 429 430 for (i = 0; i < PFUZE100_MAX_REGULATOR; i++) 431 regulator_unregister(pfuze_chip->regulators[i]); 432 433 return 0; 434 } 435 436 static struct i2c_driver pfuze_driver = { 437 .id_table = pfuze_device_id, 438 .driver = { 439 .name = "pfuze100-regulator", 440 .owner = THIS_MODULE, 441 .of_match_table = pfuze_dt_ids, 442 }, 443 .probe = pfuze100_regulator_probe, 444 .remove = pfuze100_regulator_remove, 445 }; 446 module_i2c_driver(pfuze_driver); 447 448 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>"); 449 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100 PMIC"); 450 MODULE_LICENSE("GPL v2"); 451 MODULE_ALIAS("i2c:pfuze100-regulator"); 452