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/irqdomain.h> 21 #include <linux/kernel.h> 22 #include <linux/module.h> 23 #include <linux/mutex.h> 24 #include <linux/slab.h> 25 #include <linux/err.h> 26 #include <linux/i2c.h> 27 #include <linux/platform_device.h> 28 #include <linux/regmap.h> 29 #include <linux/of.h> 30 31 #include <linux/mfd/core.h> 32 #include <linux/mfd/tps6586x.h> 33 34 #define TPS6586X_SUPPLYENE 0x14 35 #define EXITSLREQ_BIT BIT(1) 36 #define SLEEP_MODE_BIT BIT(3) 37 38 /* interrupt control registers */ 39 #define TPS6586X_INT_ACK1 0xb5 40 #define TPS6586X_INT_ACK2 0xb6 41 #define TPS6586X_INT_ACK3 0xb7 42 #define TPS6586X_INT_ACK4 0xb8 43 44 /* interrupt mask registers */ 45 #define TPS6586X_INT_MASK1 0xb0 46 #define TPS6586X_INT_MASK2 0xb1 47 #define TPS6586X_INT_MASK3 0xb2 48 #define TPS6586X_INT_MASK4 0xb3 49 #define TPS6586X_INT_MASK5 0xb4 50 51 /* device id */ 52 #define TPS6586X_VERSIONCRC 0xcd 53 54 /* Maximum register */ 55 #define TPS6586X_MAX_REGISTER TPS6586X_VERSIONCRC 56 57 struct tps6586x_irq_data { 58 u8 mask_reg; 59 u8 mask_mask; 60 }; 61 62 #define TPS6586X_IRQ(_reg, _mask) \ 63 { \ 64 .mask_reg = (_reg) - TPS6586X_INT_MASK1, \ 65 .mask_mask = (_mask), \ 66 } 67 68 static const struct tps6586x_irq_data tps6586x_irqs[] = { 69 [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0), 70 [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1), 71 [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2), 72 [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3), 73 [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4), 74 [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5), 75 [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6), 76 [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7), 77 [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0), 78 [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1), 79 [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2), 80 [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3), 81 [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4), 82 [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5), 83 [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6), 84 [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7), 85 [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4), 86 [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03), 87 [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2), 88 [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3), 89 [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0), 90 [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc), 91 [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06), 92 [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0), 93 [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5), 94 [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6), 95 [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1), 96 }; 97 98 static struct resource tps6586x_rtc_resources[] = { 99 { 100 .start = TPS6586X_INT_RTC_ALM1, 101 .end = TPS6586X_INT_RTC_ALM1, 102 .flags = IORESOURCE_IRQ, 103 }, 104 }; 105 106 static const struct mfd_cell tps6586x_cell[] = { 107 { 108 .name = "tps6586x-gpio", 109 }, 110 { 111 .name = "tps6586x-regulator", 112 }, 113 { 114 .name = "tps6586x-rtc", 115 .num_resources = ARRAY_SIZE(tps6586x_rtc_resources), 116 .resources = &tps6586x_rtc_resources[0], 117 }, 118 { 119 .name = "tps6586x-onkey", 120 }, 121 }; 122 123 struct tps6586x { 124 struct device *dev; 125 struct i2c_client *client; 126 struct regmap *regmap; 127 int version; 128 129 int irq; 130 struct irq_chip irq_chip; 131 struct mutex irq_lock; 132 int irq_base; 133 u32 irq_en; 134 u8 mask_reg[5]; 135 struct irq_domain *irq_domain; 136 }; 137 138 static inline struct tps6586x *dev_to_tps6586x(struct device *dev) 139 { 140 return i2c_get_clientdata(to_i2c_client(dev)); 141 } 142 143 int tps6586x_write(struct device *dev, int reg, uint8_t val) 144 { 145 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 146 147 return regmap_write(tps6586x->regmap, reg, val); 148 } 149 EXPORT_SYMBOL_GPL(tps6586x_write); 150 151 int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val) 152 { 153 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 154 155 return regmap_bulk_write(tps6586x->regmap, reg, val, len); 156 } 157 EXPORT_SYMBOL_GPL(tps6586x_writes); 158 159 int tps6586x_read(struct device *dev, int reg, uint8_t *val) 160 { 161 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 162 unsigned int rval; 163 int ret; 164 165 ret = regmap_read(tps6586x->regmap, reg, &rval); 166 if (!ret) 167 *val = rval; 168 return ret; 169 } 170 EXPORT_SYMBOL_GPL(tps6586x_read); 171 172 int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val) 173 { 174 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 175 176 return regmap_bulk_read(tps6586x->regmap, reg, val, len); 177 } 178 EXPORT_SYMBOL_GPL(tps6586x_reads); 179 180 int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask) 181 { 182 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 183 184 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask); 185 } 186 EXPORT_SYMBOL_GPL(tps6586x_set_bits); 187 188 int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask) 189 { 190 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 191 192 return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0); 193 } 194 EXPORT_SYMBOL_GPL(tps6586x_clr_bits); 195 196 int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask) 197 { 198 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 199 200 return regmap_update_bits(tps6586x->regmap, reg, mask, val); 201 } 202 EXPORT_SYMBOL_GPL(tps6586x_update); 203 204 int tps6586x_irq_get_virq(struct device *dev, int irq) 205 { 206 struct tps6586x *tps6586x = dev_to_tps6586x(dev); 207 208 return irq_create_mapping(tps6586x->irq_domain, irq); 209 } 210 EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq); 211 212 int tps6586x_get_version(struct device *dev) 213 { 214 struct tps6586x *tps6586x = dev_get_drvdata(dev); 215 216 return tps6586x->version; 217 } 218 EXPORT_SYMBOL_GPL(tps6586x_get_version); 219 220 static int __remove_subdev(struct device *dev, void *unused) 221 { 222 platform_device_unregister(to_platform_device(dev)); 223 return 0; 224 } 225 226 static int tps6586x_remove_subdevs(struct tps6586x *tps6586x) 227 { 228 return device_for_each_child(tps6586x->dev, NULL, __remove_subdev); 229 } 230 231 static void tps6586x_irq_lock(struct irq_data *data) 232 { 233 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); 234 235 mutex_lock(&tps6586x->irq_lock); 236 } 237 238 static void tps6586x_irq_enable(struct irq_data *irq_data) 239 { 240 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); 241 unsigned int __irq = irq_data->hwirq; 242 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; 243 244 tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask; 245 tps6586x->irq_en |= (1 << __irq); 246 } 247 248 static void tps6586x_irq_disable(struct irq_data *irq_data) 249 { 250 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); 251 252 unsigned int __irq = irq_data->hwirq; 253 const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; 254 255 tps6586x->mask_reg[data->mask_reg] |= data->mask_mask; 256 tps6586x->irq_en &= ~(1 << __irq); 257 } 258 259 static void tps6586x_irq_sync_unlock(struct irq_data *data) 260 { 261 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); 262 int i; 263 264 for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) { 265 int ret; 266 ret = tps6586x_write(tps6586x->dev, 267 TPS6586X_INT_MASK1 + i, 268 tps6586x->mask_reg[i]); 269 WARN_ON(ret); 270 } 271 272 mutex_unlock(&tps6586x->irq_lock); 273 } 274 275 #ifdef CONFIG_PM_SLEEP 276 static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on) 277 { 278 struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); 279 return irq_set_irq_wake(tps6586x->irq, on); 280 } 281 #else 282 #define tps6586x_irq_set_wake NULL 283 #endif 284 285 static struct irq_chip tps6586x_irq_chip = { 286 .name = "tps6586x", 287 .irq_bus_lock = tps6586x_irq_lock, 288 .irq_bus_sync_unlock = tps6586x_irq_sync_unlock, 289 .irq_disable = tps6586x_irq_disable, 290 .irq_enable = tps6586x_irq_enable, 291 .irq_set_wake = tps6586x_irq_set_wake, 292 }; 293 294 static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq, 295 irq_hw_number_t hw) 296 { 297 struct tps6586x *tps6586x = h->host_data; 298 299 irq_set_chip_data(virq, tps6586x); 300 irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq); 301 irq_set_nested_thread(virq, 1); 302 irq_set_noprobe(virq); 303 304 return 0; 305 } 306 307 static const struct irq_domain_ops tps6586x_domain_ops = { 308 .map = tps6586x_irq_map, 309 .xlate = irq_domain_xlate_twocell, 310 }; 311 312 static irqreturn_t tps6586x_irq(int irq, void *data) 313 { 314 struct tps6586x *tps6586x = data; 315 u32 acks; 316 int ret = 0; 317 318 ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, 319 sizeof(acks), (uint8_t *)&acks); 320 321 if (ret < 0) { 322 dev_err(tps6586x->dev, "failed to read interrupt status\n"); 323 return IRQ_NONE; 324 } 325 326 acks = le32_to_cpu(acks); 327 328 while (acks) { 329 int i = __ffs(acks); 330 331 if (tps6586x->irq_en & (1 << i)) 332 handle_nested_irq( 333 irq_find_mapping(tps6586x->irq_domain, i)); 334 335 acks &= ~(1 << i); 336 } 337 338 return IRQ_HANDLED; 339 } 340 341 static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq, 342 int irq_base) 343 { 344 int i, ret; 345 u8 tmp[4]; 346 int new_irq_base; 347 int irq_num = ARRAY_SIZE(tps6586x_irqs); 348 349 tps6586x->irq = irq; 350 351 mutex_init(&tps6586x->irq_lock); 352 for (i = 0; i < 5; i++) { 353 tps6586x->mask_reg[i] = 0xff; 354 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff); 355 } 356 357 tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp); 358 359 if (irq_base > 0) { 360 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1); 361 if (new_irq_base < 0) { 362 dev_err(tps6586x->dev, 363 "Failed to alloc IRQs: %d\n", new_irq_base); 364 return new_irq_base; 365 } 366 } else { 367 new_irq_base = 0; 368 } 369 370 tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node, 371 irq_num, new_irq_base, &tps6586x_domain_ops, 372 tps6586x); 373 if (!tps6586x->irq_domain) { 374 dev_err(tps6586x->dev, "Failed to create IRQ domain\n"); 375 return -ENOMEM; 376 } 377 ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT, 378 "tps6586x", tps6586x); 379 380 if (!ret) 381 device_init_wakeup(tps6586x->dev, 1); 382 383 return ret; 384 } 385 386 static int tps6586x_add_subdevs(struct tps6586x *tps6586x, 387 struct tps6586x_platform_data *pdata) 388 { 389 struct tps6586x_subdev_info *subdev; 390 struct platform_device *pdev; 391 int i, ret = 0; 392 393 for (i = 0; i < pdata->num_subdevs; i++) { 394 subdev = &pdata->subdevs[i]; 395 396 pdev = platform_device_alloc(subdev->name, subdev->id); 397 if (!pdev) { 398 ret = -ENOMEM; 399 goto failed; 400 } 401 402 pdev->dev.parent = tps6586x->dev; 403 pdev->dev.platform_data = subdev->platform_data; 404 pdev->dev.of_node = subdev->of_node; 405 406 ret = platform_device_add(pdev); 407 if (ret) { 408 platform_device_put(pdev); 409 goto failed; 410 } 411 } 412 return 0; 413 414 failed: 415 tps6586x_remove_subdevs(tps6586x); 416 return ret; 417 } 418 419 #ifdef CONFIG_OF 420 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) 421 { 422 struct device_node *np = client->dev.of_node; 423 struct tps6586x_platform_data *pdata; 424 425 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); 426 if (!pdata) { 427 dev_err(&client->dev, "Memory allocation failed\n"); 428 return NULL; 429 } 430 431 pdata->num_subdevs = 0; 432 pdata->subdevs = NULL; 433 pdata->gpio_base = -1; 434 pdata->irq_base = -1; 435 pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller"); 436 437 return pdata; 438 } 439 440 static const struct of_device_id tps6586x_of_match[] = { 441 { .compatible = "ti,tps6586x", }, 442 { }, 443 }; 444 #else 445 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) 446 { 447 return NULL; 448 } 449 #endif 450 451 static bool is_volatile_reg(struct device *dev, unsigned int reg) 452 { 453 /* Cache all interrupt mask register */ 454 if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5)) 455 return false; 456 457 return true; 458 } 459 460 static const struct regmap_config tps6586x_regmap_config = { 461 .reg_bits = 8, 462 .val_bits = 8, 463 .max_register = TPS6586X_MAX_REGISTER, 464 .volatile_reg = is_volatile_reg, 465 .cache_type = REGCACHE_RBTREE, 466 }; 467 468 static struct device *tps6586x_dev; 469 static void tps6586x_power_off(void) 470 { 471 if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT)) 472 return; 473 474 tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT); 475 } 476 477 static void tps6586x_print_version(struct i2c_client *client, int version) 478 { 479 const char *name; 480 481 switch (version) { 482 case TPS658621A: 483 name = "TPS658621A"; 484 break; 485 case TPS658621CD: 486 name = "TPS658621C/D"; 487 break; 488 case TPS658623: 489 name = "TPS658623"; 490 break; 491 case TPS658640: 492 case TPS658640v2: 493 name = "TPS658640"; 494 break; 495 case TPS658643: 496 name = "TPS658643"; 497 break; 498 default: 499 name = "TPS6586X"; 500 break; 501 } 502 503 dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version); 504 } 505 506 static int tps6586x_i2c_probe(struct i2c_client *client, 507 const struct i2c_device_id *id) 508 { 509 struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev); 510 struct tps6586x *tps6586x; 511 int ret; 512 int version; 513 514 if (!pdata && client->dev.of_node) 515 pdata = tps6586x_parse_dt(client); 516 517 if (!pdata) { 518 dev_err(&client->dev, "tps6586x requires platform data\n"); 519 return -ENOTSUPP; 520 } 521 522 version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC); 523 if (version < 0) { 524 dev_err(&client->dev, "Chip ID read failed: %d\n", version); 525 return -EIO; 526 } 527 528 tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL); 529 if (!tps6586x) 530 return -ENOMEM; 531 532 tps6586x->version = version; 533 tps6586x_print_version(client, tps6586x->version); 534 535 tps6586x->client = client; 536 tps6586x->dev = &client->dev; 537 i2c_set_clientdata(client, tps6586x); 538 539 tps6586x->regmap = devm_regmap_init_i2c(client, 540 &tps6586x_regmap_config); 541 if (IS_ERR(tps6586x->regmap)) { 542 ret = PTR_ERR(tps6586x->regmap); 543 dev_err(&client->dev, "regmap init failed: %d\n", ret); 544 return ret; 545 } 546 547 548 if (client->irq) { 549 ret = tps6586x_irq_init(tps6586x, client->irq, 550 pdata->irq_base); 551 if (ret) { 552 dev_err(&client->dev, "IRQ init failed: %d\n", ret); 553 return ret; 554 } 555 } 556 557 ret = mfd_add_devices(tps6586x->dev, -1, 558 tps6586x_cell, ARRAY_SIZE(tps6586x_cell), 559 NULL, 0, tps6586x->irq_domain); 560 if (ret < 0) { 561 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret); 562 goto err_mfd_add; 563 } 564 565 ret = tps6586x_add_subdevs(tps6586x, pdata); 566 if (ret) { 567 dev_err(&client->dev, "add devices failed: %d\n", ret); 568 goto err_add_devs; 569 } 570 571 if (pdata->pm_off && !pm_power_off) { 572 tps6586x_dev = &client->dev; 573 pm_power_off = tps6586x_power_off; 574 } 575 576 return 0; 577 578 err_add_devs: 579 mfd_remove_devices(tps6586x->dev); 580 err_mfd_add: 581 if (client->irq) 582 free_irq(client->irq, tps6586x); 583 return ret; 584 } 585 586 static int tps6586x_i2c_remove(struct i2c_client *client) 587 { 588 struct tps6586x *tps6586x = i2c_get_clientdata(client); 589 590 tps6586x_remove_subdevs(tps6586x); 591 mfd_remove_devices(tps6586x->dev); 592 if (client->irq) 593 free_irq(client->irq, tps6586x); 594 return 0; 595 } 596 597 static const struct i2c_device_id tps6586x_id_table[] = { 598 { "tps6586x", 0 }, 599 { }, 600 }; 601 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table); 602 603 static struct i2c_driver tps6586x_driver = { 604 .driver = { 605 .name = "tps6586x", 606 .of_match_table = of_match_ptr(tps6586x_of_match), 607 }, 608 .probe = tps6586x_i2c_probe, 609 .remove = tps6586x_i2c_remove, 610 .id_table = tps6586x_id_table, 611 }; 612 613 static int __init tps6586x_init(void) 614 { 615 return i2c_add_driver(&tps6586x_driver); 616 } 617 subsys_initcall(tps6586x_init); 618 619 static void __exit tps6586x_exit(void) 620 { 621 i2c_del_driver(&tps6586x_driver); 622 } 623 module_exit(tps6586x_exit); 624 625 MODULE_DESCRIPTION("TPS6586X core driver"); 626 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); 627 MODULE_LICENSE("GPL"); 628