1 /* 2 * Core driver for TI TPS6586x PMIC family 3 * 4 * Copyright (c) 2010 CompuLab Ltd. 5 * Mike Rapoport <mike@compulab.co.il> 6 * 7 * Based on da903x.c. 8 * Copyright (C) 2008 Compulab, Ltd. 9 * Mike Rapoport <mike@compulab.co.il> 10 * Copyright (C) 2006-2008 Marvell International Ltd. 11 * Eric Miao <eric.miao@marvell.com> 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License version 2 as 15 * published by the Free Software Foundation. 16 */ 17 18 #include <linux/interrupt.h> 19 #include <linux/irq.h> 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/mutex.h> 23 #include <linux/slab.h> 24 #include <linux/err.h> 25 #include <linux/i2c.h> 26 #include <linux/regmap.h> 27 #include <linux/regulator/of_regulator.h> 28 29 #include <linux/mfd/core.h> 30 #include <linux/mfd/tps6586x.h> 31 32 /* interrupt control registers */ 33 #define TPS6586X_INT_ACK1 0xb5 34 #define TPS6586X_INT_ACK2 0xb6 35 #define TPS6586X_INT_ACK3 0xb7 36 #define TPS6586X_INT_ACK4 0xb8 37 38 /* interrupt mask registers */ 39 #define TPS6586X_INT_MASK1 0xb0 40 #define TPS6586X_INT_MASK2 0xb1 41 #define TPS6586X_INT_MASK3 0xb2 42 #define TPS6586X_INT_MASK4 0xb3 43 #define TPS6586X_INT_MASK5 0xb4 44 45 /* device id */ 46 #define TPS6586X_VERSIONCRC 0xcd 47 48 /* Maximum register */ 49 #define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1) 50 51 struct tps6586x_irq_data { 52 u8 mask_reg; 53 u8 mask_mask; 54 }; 55 56 #define TPS6586X_IRQ(_reg, _mask) \ 57 { \ 58 .mask_reg = (_reg) - TPS6586X_INT_MASK1, \ 59 .mask_mask = (_mask), \ 60 } 61 62 static const struct tps6586x_irq_data tps6586x_irqs[] = { 63 [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0), 64 [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1), 65 [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2), 66 [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3), 67 [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4), 68 [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5), 69 [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6), 70 [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7), 71 [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0), 72 [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1), 73 [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2), 74 [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3), 75 [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4), 76 [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5), 77 [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6), 78 [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7), 79 [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4), 80 [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03), 81 [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2), 82 [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3), 83 [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0), 84 [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc), 85 [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06), 86 [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0), 87 [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5), 88 [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6), 89 [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1), 90 }; 91 92 static struct mfd_cell tps6586x_cell[] = { 93 { 94 .name = "tps6586x-gpio", 95 }, 96 { 97 .name = "tps6586x-rtc", 98 }, 99 { 100 .name = "tps6586x-onkey", 101 }, 102 }; 103 104 struct tps6586x { 105 struct device *dev; 106 struct i2c_client *client; 107 struct regmap *regmap; 108 109 struct irq_chip irq_chip; 110 struct mutex irq_lock; 111 int irq_base; 112 u32 irq_en; 113 u8 mask_reg[5]; 114 }; 115 116 static inline struct tps6586x *dev_to_tps6586x(struct device *dev) 117 { 118 return i2c_get_clientdata(to_i2c_client(dev)); 119 } 120 121 int tps6586x_write(struct device *dev, int reg, uint8_t val) 122 { 123 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 124 125 return regmap_write(tps6586x->regmap, reg, val); 126 } 127 EXPORT_SYMBOL_GPL(tps6586x_write); 128 129 int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val) 130 { 131 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 132 133 return regmap_bulk_write(tps6586x->regmap, reg, val, len); 134 } 135 EXPORT_SYMBOL_GPL(tps6586x_writes); 136 137 int tps6586x_read(struct device *dev, int reg, uint8_t *val) 138 { 139 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 140 unsigned int rval; 141 int ret; 142 143 ret = regmap_read(tps6586x->regmap, reg, &rval); 144 if (!ret) 145 *val = rval; 146 return ret; 147 } 148 EXPORT_SYMBOL_GPL(tps6586x_read); 149 150 int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val) 151 { 152 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 153 154 return regmap_bulk_read(tps6586x->regmap, reg, val, len); 155 } 156 EXPORT_SYMBOL_GPL(tps6586x_reads); 157 158 int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask) 159 { 160 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 161 162 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask); 163 } 164 EXPORT_SYMBOL_GPL(tps6586x_set_bits); 165 166 int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask) 167 { 168 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 169 170 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0); 171 } 172 EXPORT_SYMBOL_GPL(tps6586x_clr_bits); 173 174 int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask) 175 { 176 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 177 178 return regmap_update_bits(tps6586x->regmap, reg, mask, val); 179 } 180 EXPORT_SYMBOL_GPL(tps6586x_update); 181 182 static int __remove_subdev(struct device *dev, void *unused) 183 { 184 platform_device_unregister(to_platform_device(dev)); 185 return 0; 186 } 187 188 static int tps6586x_remove_subdevs(struct tps6586x *tps6586x) 189 { 190 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev); 191 } 192 193 static void tps6586x_irq_lock(struct irq_data *data) 194 { 195 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); 196 197 mutex_lock(&tps6586x->irq_lock); 198 } 199 200 static void tps6586x_irq_enable(struct irq_data *irq_data) 201 { 202 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); 203 unsigned int __irq = irq_data->irq - tps6586x->irq_base; 204 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; 205 206 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask; 207 tps6586x->irq_en |= (1 << __irq); 208 } 209 210 static void tps6586x_irq_disable(struct irq_data *irq_data) 211 { 212 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); 213 214 unsigned int __irq = irq_data->irq - tps6586x->irq_base; 215 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; 216 217 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask; 218 tps6586x->irq_en &= ~(1 << __irq); 219 } 220 221 static void tps6586x_irq_sync_unlock(struct irq_data *data) 222 { 223 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); 224 int i; 225 226 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) { 227 int ret; 228 ret = tps6586x_write(tps6586x->dev, 229 TPS6586X_INT_MASK1 + i, 230 tps6586x->mask_reg[i]); 231 WARN_ON(ret); 232 } 233 234 mutex_unlock(&tps6586x->irq_lock); 235 } 236 237 static irqreturn_t tps6586x_irq(int irq, void *data) 238 { 239 struct tps6586x *tps6586x = data; 240 u32 acks; 241 int ret = 0; 242 243 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, 244 sizeof(acks), (uint8_t *)&acks); 245 246 if (ret < 0) { 247 dev_err(tps6586x->dev, "failed to read interrupt status\n"); 248 return IRQ_NONE; 249 } 250 251 acks = le32_to_cpu(acks); 252 253 while (acks) { 254 int i = __ffs(acks); 255 256 if (tps6586x->irq_en & (1 << i)) 257 handle_nested_irq(tps6586x->irq_base + i); 258 259 acks &= ~(1 << i); 260 } 261 262 return IRQ_HANDLED; 263 } 264 265 static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq, 266 int irq_base) 267 { 268 int i, ret; 269 u8 tmp[4]; 270 271 if (!irq_base) { 272 dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n"); 273 return -EINVAL; 274 } 275 276 mutex_init(&tps6586x->irq_lock); 277 for (i = 0; i < 5; i++) { 278 tps6586x->mask_reg[i] = 0xff; 279 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff); 280 } 281 282 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp); 283 284 tps6586x->irq_base = irq_base; 285 286 tps6586x->irq_chip.name = "tps6586x"; 287 tps6586x->irq_chip.irq_enable = tps6586x_irq_enable; 288 tps6586x->irq_chip.irq_disable = tps6586x_irq_disable; 289 tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock; 290 tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock; 291 292 for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) { 293 int __irq = i + tps6586x->irq_base; 294 irq_set_chip_data(__irq, tps6586x); 295 irq_set_chip_and_handler(__irq, &tps6586x->irq_chip, 296 handle_simple_irq); 297 irq_set_nested_thread(__irq, 1); 298 #ifdef CONFIG_ARM 299 set_irq_flags(__irq, IRQF_VALID); 300 #endif 301 } 302 303 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT, 304 "tps6586x", tps6586x); 305 306 if (!ret) { 307 device_init_wakeup(tps6586x->dev, 1); 308 enable_irq_wake(irq); 309 } 310 311 return ret; 312 } 313 314 static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x, 315 struct tps6586x_platform_data *pdata) 316 { 317 struct tps6586x_subdev_info *subdev; 318 struct platform_device *pdev; 319 int i, ret = 0; 320 321 for (i = 0; i < pdata->num_subdevs; i++) { 322 subdev = &pdata->subdevs[i]; 323 324 pdev = platform_device_alloc(subdev->name, subdev->id); 325 if (!pdev) { 326 ret = -ENOMEM; 327 goto failed; 328 } 329 330 pdev->dev.parent = tps6586x->dev; 331 pdev->dev.platform_data = subdev->platform_data; 332 pdev->dev.of_node = subdev->of_node; 333 334 ret = platform_device_add(pdev); 335 if (ret) { 336 platform_device_put(pdev); 337 goto failed; 338 } 339 } 340 return 0; 341 342 failed: 343 tps6586x_remove_subdevs(tps6586x); 344 return ret; 345 } 346 347 #ifdef CONFIG_OF 348 static struct of_regulator_match tps6586x_matches[] = { 349 { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 }, 350 { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 }, 351 { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 }, 352 { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 }, 353 { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 }, 354 { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 }, 355 { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 }, 356 { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 }, 357 { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 }, 358 { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 }, 359 { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 }, 360 { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 }, 361 { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 }, 362 { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC }, 363 }; 364 365 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) 366 { 367 const unsigned int num = ARRAY_SIZE(tps6586x_matches); 368 struct device_node *np = client->dev.of_node; 369 struct tps6586x_platform_data *pdata; 370 struct tps6586x_subdev_info *devs; 371 struct device_node *regs; 372 unsigned int count; 373 unsigned int i, j; 374 int err; 375 376 regs = of_find_node_by_name(np, "regulators"); 377 if (!regs) 378 return NULL; 379 380 err = of_regulator_match(&client->dev, regs, tps6586x_matches, num); 381 if (err < 0) { 382 of_node_put(regs); 383 return NULL; 384 } 385 386 of_node_put(regs); 387 count = err; 388 389 devs = devm_kzalloc(&client->dev, count * sizeof(*devs), GFP_KERNEL); 390 if (!devs) 391 return NULL; 392 393 for (i = 0, j = 0; i < num && j < count; i++) { 394 if (!tps6586x_matches[i].init_data) 395 continue; 396 397 devs[j].name = "tps6586x-regulator"; 398 devs[j].platform_data = tps6586x_matches[i].init_data; 399 devs[j].id = (int)tps6586x_matches[i].driver_data; 400 devs[j].of_node = tps6586x_matches[i].of_node; 401 j++; 402 } 403 404 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); 405 if (!pdata) 406 return NULL; 407 408 pdata->num_subdevs = count; 409 pdata->subdevs = devs; 410 pdata->gpio_base = -1; 411 pdata->irq_base = -1; 412 413 return pdata; 414 } 415 416 static struct of_device_id tps6586x_of_match[] = { 417 { .compatible = "ti,tps6586x", }, 418 { }, 419 }; 420 #else 421 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) 422 { 423 return NULL; 424 } 425 #endif 426 427 static bool is_volatile_reg(struct device *dev, unsigned int reg) 428 { 429 /* Cache all interrupt mask register */ 430 if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5)) 431 return false; 432 433 return true; 434 } 435 436 static const struct regmap_config tps6586x_regmap_config = { 437 .reg_bits = 8, 438 .val_bits = 8, 439 .max_register = TPS6586X_MAX_REGISTER - 1, 440 .volatile_reg = is_volatile_reg, 441 .cache_type = REGCACHE_RBTREE, 442 }; 443 444 static int __devinit tps6586x_i2c_probe(struct i2c_client *client, 445 const struct i2c_device_id *id) 446 { 447 struct tps6586x_platform_data *pdata = client->dev.platform_data; 448 struct tps6586x *tps6586x; 449 int ret; 450 451 if (!pdata && client->dev.of_node) 452 pdata = tps6586x_parse_dt(client); 453 454 if (!pdata) { 455 dev_err(&client->dev, "tps6586x requires platform data\n"); 456 return -ENOTSUPP; 457 } 458 459 ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC); 460 if (ret < 0) { 461 dev_err(&client->dev, "Chip ID read failed: %d\n", ret); 462 return -EIO; 463 } 464 465 dev_info(&client->dev, "VERSIONCRC is %02x\n", ret); 466 467 tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL); 468 if (tps6586x == NULL) { 469 dev_err(&client->dev, "memory for tps6586x alloc failed\n"); 470 return -ENOMEM; 471 } 472 473 tps6586x->client = client; 474 tps6586x->dev = &client->dev; 475 i2c_set_clientdata(client, tps6586x); 476 477 tps6586x->regmap = devm_regmap_init_i2c(client, 478 &tps6586x_regmap_config); 479 if (IS_ERR(tps6586x->regmap)) { 480 ret = PTR_ERR(tps6586x->regmap); 481 dev_err(&client->dev, "regmap init failed: %d\n", ret); 482 return ret; 483 } 484 485 486 if (client->irq) { 487 ret = tps6586x_irq_init(tps6586x, client->irq, 488 pdata->irq_base); 489 if (ret) { 490 dev_err(&client->dev, "IRQ init failed: %d\n", ret); 491 return ret; 492 } 493 } 494 495 ret = mfd_add_devices(tps6586x->dev, -1, 496 tps6586x_cell, ARRAY_SIZE(tps6586x_cell), NULL, 0); 497 if (ret < 0) { 498 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret); 499 goto err_mfd_add; 500 } 501 502 ret = tps6586x_add_subdevs(tps6586x, pdata); 503 if (ret) { 504 dev_err(&client->dev, "add devices failed: %d\n", ret); 505 goto err_add_devs; 506 } 507 508 return 0; 509 510 err_add_devs: 511 mfd_remove_devices(tps6586x->dev); 512 err_mfd_add: 513 if (client->irq) 514 free_irq(client->irq, tps6586x); 515 return ret; 516 } 517 518 static int __devexit tps6586x_i2c_remove(struct i2c_client *client) 519 { 520 struct tps6586x *tps6586x = i2c_get_clientdata(client); 521 522 tps6586x_remove_subdevs(tps6586x); 523 mfd_remove_devices(tps6586x->dev); 524 if (client->irq) 525 free_irq(client->irq, tps6586x); 526 return 0; 527 } 528 529 static const struct i2c_device_id tps6586x_id_table[] = { 530 { "tps6586x", 0 }, 531 { }, 532 }; 533 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table); 534 535 static struct i2c_driver tps6586x_driver = { 536 .driver = { 537 .name = "tps6586x", 538 .owner = THIS_MODULE, 539 .of_match_table = of_match_ptr(tps6586x_of_match), 540 }, 541 .probe = tps6586x_i2c_probe, 542 .remove = __devexit_p(tps6586x_i2c_remove), 543 .id_table = tps6586x_id_table, 544 }; 545 546 static int __init tps6586x_init(void) 547 { 548 return i2c_add_driver(&tps6586x_driver); 549 } 550 subsys_initcall(tps6586x_init); 551 552 static void __exit tps6586x_exit(void) 553 { 554 i2c_del_driver(&tps6586x_driver); 555 } 556 module_exit(tps6586x_exit); 557 558 MODULE_DESCRIPTION("TPS6586X core driver"); 559 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); 560 MODULE_LICENSE("GPL"); 561