1 /* 2 * tps65910.c -- TI TPS6591x 3 * 4 * Copyright 2010 Texas Instruments Inc. 5 * 6 * Author: Graeme Gregory <gg@slimlogic.co.uk> 7 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 */ 15 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <linux/init.h> 19 #include <linux/err.h> 20 #include <linux/slab.h> 21 #include <linux/i2c.h> 22 #include <linux/interrupt.h> 23 #include <linux/irq.h> 24 #include <linux/irqdomain.h> 25 #include <linux/mfd/core.h> 26 #include <linux/regmap.h> 27 #include <linux/mfd/tps65910.h> 28 #include <linux/of.h> 29 #include <linux/of_device.h> 30 31 static struct resource rtc_resources[] = { 32 { 33 .start = TPS65910_IRQ_RTC_ALARM, 34 .end = TPS65910_IRQ_RTC_ALARM, 35 .flags = IORESOURCE_IRQ, 36 } 37 }; 38 39 static const struct mfd_cell tps65910s[] = { 40 { 41 .name = "tps65910-gpio", 42 }, 43 { 44 .name = "tps65910-pmic", 45 }, 46 { 47 .name = "tps65910-rtc", 48 .num_resources = ARRAY_SIZE(rtc_resources), 49 .resources = &rtc_resources[0], 50 }, 51 { 52 .name = "tps65910-power", 53 }, 54 }; 55 56 57 static const struct regmap_irq tps65911_irqs[] = { 58 /* INT_STS */ 59 [TPS65911_IRQ_PWRHOLD_F] = { 60 .mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK, 61 .reg_offset = 0, 62 }, 63 [TPS65911_IRQ_VBAT_VMHI] = { 64 .mask = INT_MSK_VMBHI_IT_MSK_MASK, 65 .reg_offset = 0, 66 }, 67 [TPS65911_IRQ_PWRON] = { 68 .mask = INT_MSK_PWRON_IT_MSK_MASK, 69 .reg_offset = 0, 70 }, 71 [TPS65911_IRQ_PWRON_LP] = { 72 .mask = INT_MSK_PWRON_LP_IT_MSK_MASK, 73 .reg_offset = 0, 74 }, 75 [TPS65911_IRQ_PWRHOLD_R] = { 76 .mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK, 77 .reg_offset = 0, 78 }, 79 [TPS65911_IRQ_HOTDIE] = { 80 .mask = INT_MSK_HOTDIE_IT_MSK_MASK, 81 .reg_offset = 0, 82 }, 83 [TPS65911_IRQ_RTC_ALARM] = { 84 .mask = INT_MSK_RTC_ALARM_IT_MSK_MASK, 85 .reg_offset = 0, 86 }, 87 [TPS65911_IRQ_RTC_PERIOD] = { 88 .mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK, 89 .reg_offset = 0, 90 }, 91 92 /* INT_STS2 */ 93 [TPS65911_IRQ_GPIO0_R] = { 94 .mask = INT_MSK2_GPIO0_R_IT_MSK_MASK, 95 .reg_offset = 1, 96 }, 97 [TPS65911_IRQ_GPIO0_F] = { 98 .mask = INT_MSK2_GPIO0_F_IT_MSK_MASK, 99 .reg_offset = 1, 100 }, 101 [TPS65911_IRQ_GPIO1_R] = { 102 .mask = INT_MSK2_GPIO1_R_IT_MSK_MASK, 103 .reg_offset = 1, 104 }, 105 [TPS65911_IRQ_GPIO1_F] = { 106 .mask = INT_MSK2_GPIO1_F_IT_MSK_MASK, 107 .reg_offset = 1, 108 }, 109 [TPS65911_IRQ_GPIO2_R] = { 110 .mask = INT_MSK2_GPIO2_R_IT_MSK_MASK, 111 .reg_offset = 1, 112 }, 113 [TPS65911_IRQ_GPIO2_F] = { 114 .mask = INT_MSK2_GPIO2_F_IT_MSK_MASK, 115 .reg_offset = 1, 116 }, 117 [TPS65911_IRQ_GPIO3_R] = { 118 .mask = INT_MSK2_GPIO3_R_IT_MSK_MASK, 119 .reg_offset = 1, 120 }, 121 [TPS65911_IRQ_GPIO3_F] = { 122 .mask = INT_MSK2_GPIO3_F_IT_MSK_MASK, 123 .reg_offset = 1, 124 }, 125 126 /* INT_STS2 */ 127 [TPS65911_IRQ_GPIO4_R] = { 128 .mask = INT_MSK3_GPIO4_R_IT_MSK_MASK, 129 .reg_offset = 2, 130 }, 131 [TPS65911_IRQ_GPIO4_F] = { 132 .mask = INT_MSK3_GPIO4_F_IT_MSK_MASK, 133 .reg_offset = 2, 134 }, 135 [TPS65911_IRQ_GPIO5_R] = { 136 .mask = INT_MSK3_GPIO5_R_IT_MSK_MASK, 137 .reg_offset = 2, 138 }, 139 [TPS65911_IRQ_GPIO5_F] = { 140 .mask = INT_MSK3_GPIO5_F_IT_MSK_MASK, 141 .reg_offset = 2, 142 }, 143 [TPS65911_IRQ_WTCHDG] = { 144 .mask = INT_MSK3_WTCHDG_IT_MSK_MASK, 145 .reg_offset = 2, 146 }, 147 [TPS65911_IRQ_VMBCH2_H] = { 148 .mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK, 149 .reg_offset = 2, 150 }, 151 [TPS65911_IRQ_VMBCH2_L] = { 152 .mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK, 153 .reg_offset = 2, 154 }, 155 [TPS65911_IRQ_PWRDN] = { 156 .mask = INT_MSK3_PWRDN_IT_MSK_MASK, 157 .reg_offset = 2, 158 }, 159 }; 160 161 static const struct regmap_irq tps65910_irqs[] = { 162 /* INT_STS */ 163 [TPS65910_IRQ_VBAT_VMBDCH] = { 164 .mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK, 165 .reg_offset = 0, 166 }, 167 [TPS65910_IRQ_VBAT_VMHI] = { 168 .mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK, 169 .reg_offset = 0, 170 }, 171 [TPS65910_IRQ_PWRON] = { 172 .mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK, 173 .reg_offset = 0, 174 }, 175 [TPS65910_IRQ_PWRON_LP] = { 176 .mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK, 177 .reg_offset = 0, 178 }, 179 [TPS65910_IRQ_PWRHOLD] = { 180 .mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK, 181 .reg_offset = 0, 182 }, 183 [TPS65910_IRQ_HOTDIE] = { 184 .mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK, 185 .reg_offset = 0, 186 }, 187 [TPS65910_IRQ_RTC_ALARM] = { 188 .mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK, 189 .reg_offset = 0, 190 }, 191 [TPS65910_IRQ_RTC_PERIOD] = { 192 .mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK, 193 .reg_offset = 0, 194 }, 195 196 /* INT_STS2 */ 197 [TPS65910_IRQ_GPIO_R] = { 198 .mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK, 199 .reg_offset = 1, 200 }, 201 [TPS65910_IRQ_GPIO_F] = { 202 .mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK, 203 .reg_offset = 1, 204 }, 205 }; 206 207 static struct regmap_irq_chip tps65911_irq_chip = { 208 .name = "tps65910", 209 .irqs = tps65911_irqs, 210 .num_irqs = ARRAY_SIZE(tps65911_irqs), 211 .num_regs = 3, 212 .irq_reg_stride = 2, 213 .status_base = TPS65910_INT_STS, 214 .mask_base = TPS65910_INT_MSK, 215 .ack_base = TPS65910_INT_STS, 216 }; 217 218 static struct regmap_irq_chip tps65910_irq_chip = { 219 .name = "tps65910", 220 .irqs = tps65910_irqs, 221 .num_irqs = ARRAY_SIZE(tps65910_irqs), 222 .num_regs = 2, 223 .irq_reg_stride = 2, 224 .status_base = TPS65910_INT_STS, 225 .mask_base = TPS65910_INT_MSK, 226 .ack_base = TPS65910_INT_STS, 227 }; 228 229 static int tps65910_irq_init(struct tps65910 *tps65910, int irq, 230 struct tps65910_platform_data *pdata) 231 { 232 int ret = 0; 233 static struct regmap_irq_chip *tps6591x_irqs_chip; 234 235 if (!irq) { 236 dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n"); 237 return -EINVAL; 238 } 239 240 if (!pdata) { 241 dev_warn(tps65910->dev, "No interrupt support, no pdata\n"); 242 return -EINVAL; 243 } 244 245 switch (tps65910_chip_id(tps65910)) { 246 case TPS65910: 247 tps6591x_irqs_chip = &tps65910_irq_chip; 248 break; 249 case TPS65911: 250 tps6591x_irqs_chip = &tps65911_irq_chip; 251 break; 252 } 253 254 tps65910->chip_irq = irq; 255 ret = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap, 256 tps65910->chip_irq, 257 IRQF_ONESHOT, pdata->irq_base, 258 tps6591x_irqs_chip, &tps65910->irq_data); 259 if (ret < 0) { 260 dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret); 261 tps65910->chip_irq = 0; 262 } 263 return ret; 264 } 265 266 static bool is_volatile_reg(struct device *dev, unsigned int reg) 267 { 268 struct tps65910 *tps65910 = dev_get_drvdata(dev); 269 270 /* 271 * Caching all regulator registers. 272 * All regualator register address range is same for 273 * TPS65910 and TPS65911 274 */ 275 if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) { 276 /* Check for non-existing register */ 277 if (tps65910_chip_id(tps65910) == TPS65910) 278 if ((reg == TPS65911_VDDCTRL_OP) || 279 (reg == TPS65911_VDDCTRL_SR)) 280 return true; 281 return false; 282 } 283 return true; 284 } 285 286 static const struct regmap_config tps65910_regmap_config = { 287 .reg_bits = 8, 288 .val_bits = 8, 289 .volatile_reg = is_volatile_reg, 290 .max_register = TPS65910_MAX_REGISTER - 1, 291 .cache_type = REGCACHE_RBTREE, 292 }; 293 294 static int tps65910_ck32k_init(struct tps65910 *tps65910, 295 struct tps65910_board *pmic_pdata) 296 { 297 int ret; 298 299 if (!pmic_pdata->en_ck32k_xtal) 300 return 0; 301 302 ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, 303 DEVCTRL_CK32K_CTRL_MASK); 304 if (ret < 0) { 305 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret); 306 return ret; 307 } 308 309 return 0; 310 } 311 312 static int tps65910_sleepinit(struct tps65910 *tps65910, 313 struct tps65910_board *pmic_pdata) 314 { 315 struct device *dev = NULL; 316 int ret = 0; 317 318 dev = tps65910->dev; 319 320 if (!pmic_pdata->en_dev_slp) 321 return 0; 322 323 /* enabling SLEEP device state */ 324 ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, 325 DEVCTRL_DEV_SLP_MASK); 326 if (ret < 0) { 327 dev_err(dev, "set dev_slp failed: %d\n", ret); 328 goto err_sleep_init; 329 } 330 331 /* Return if there is no sleep keepon data. */ 332 if (!pmic_pdata->slp_keepon) 333 return 0; 334 335 if (pmic_pdata->slp_keepon->therm_keepon) { 336 ret = tps65910_reg_set_bits(tps65910, 337 TPS65910_SLEEP_KEEP_RES_ON, 338 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); 339 if (ret < 0) { 340 dev_err(dev, "set therm_keepon failed: %d\n", ret); 341 goto disable_dev_slp; 342 } 343 } 344 345 if (pmic_pdata->slp_keepon->clkout32k_keepon) { 346 ret = tps65910_reg_set_bits(tps65910, 347 TPS65910_SLEEP_KEEP_RES_ON, 348 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); 349 if (ret < 0) { 350 dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); 351 goto disable_dev_slp; 352 } 353 } 354 355 if (pmic_pdata->slp_keepon->i2chs_keepon) { 356 ret = tps65910_reg_set_bits(tps65910, 357 TPS65910_SLEEP_KEEP_RES_ON, 358 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK); 359 if (ret < 0) { 360 dev_err(dev, "set i2chs_keepon failed: %d\n", ret); 361 goto disable_dev_slp; 362 } 363 } 364 365 return 0; 366 367 disable_dev_slp: 368 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, 369 DEVCTRL_DEV_SLP_MASK); 370 371 err_sleep_init: 372 return ret; 373 } 374 375 #ifdef CONFIG_OF 376 static const struct of_device_id tps65910_of_match[] = { 377 { .compatible = "ti,tps65910", .data = (void *)TPS65910}, 378 { .compatible = "ti,tps65911", .data = (void *)TPS65911}, 379 { }, 380 }; 381 MODULE_DEVICE_TABLE(of, tps65910_of_match); 382 383 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, 384 unsigned long *chip_id) 385 { 386 struct device_node *np = client->dev.of_node; 387 struct tps65910_board *board_info; 388 unsigned int prop; 389 const struct of_device_id *match; 390 int ret = 0; 391 392 match = of_match_device(tps65910_of_match, &client->dev); 393 if (!match) { 394 dev_err(&client->dev, "Failed to find matching dt id\n"); 395 return NULL; 396 } 397 398 *chip_id = (unsigned long)match->data; 399 400 board_info = devm_kzalloc(&client->dev, sizeof(*board_info), 401 GFP_KERNEL); 402 if (!board_info) { 403 dev_err(&client->dev, "Failed to allocate pdata\n"); 404 return NULL; 405 } 406 407 ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop); 408 if (!ret) 409 board_info->vmbch_threshold = prop; 410 411 ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop); 412 if (!ret) 413 board_info->vmbch2_threshold = prop; 414 415 prop = of_property_read_bool(np, "ti,en-ck32k-xtal"); 416 board_info->en_ck32k_xtal = prop; 417 418 board_info->irq = client->irq; 419 board_info->irq_base = -1; 420 board_info->pm_off = of_property_read_bool(np, 421 "ti,system-power-controller"); 422 423 return board_info; 424 } 425 #else 426 static inline 427 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, 428 unsigned long *chip_id) 429 { 430 return NULL; 431 } 432 #endif 433 434 static struct i2c_client *tps65910_i2c_client; 435 static void tps65910_power_off(void) 436 { 437 struct tps65910 *tps65910; 438 439 tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev); 440 441 if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL, 442 DEVCTRL_PWR_OFF_MASK) < 0) 443 return; 444 445 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL, 446 DEVCTRL_DEV_ON_MASK); 447 } 448 449 static int tps65910_i2c_probe(struct i2c_client *i2c, 450 const struct i2c_device_id *id) 451 { 452 struct tps65910 *tps65910; 453 struct tps65910_board *pmic_plat_data; 454 struct tps65910_board *of_pmic_plat_data = NULL; 455 struct tps65910_platform_data *init_data; 456 unsigned long chip_id = id->driver_data; 457 int ret = 0; 458 459 pmic_plat_data = dev_get_platdata(&i2c->dev); 460 461 if (!pmic_plat_data && i2c->dev.of_node) { 462 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); 463 of_pmic_plat_data = pmic_plat_data; 464 } 465 466 if (!pmic_plat_data) 467 return -EINVAL; 468 469 init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); 470 if (init_data == NULL) 471 return -ENOMEM; 472 473 tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); 474 if (tps65910 == NULL) 475 return -ENOMEM; 476 477 tps65910->of_plat_data = of_pmic_plat_data; 478 i2c_set_clientdata(i2c, tps65910); 479 tps65910->dev = &i2c->dev; 480 tps65910->i2c_client = i2c; 481 tps65910->id = chip_id; 482 483 /* Work around silicon erratum SWCZ010: the tps65910 may miss the 484 * first I2C transfer. So issue a dummy transfer before the first 485 * real transfer. 486 */ 487 i2c_master_send(i2c, "", 1); 488 tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); 489 if (IS_ERR(tps65910->regmap)) { 490 ret = PTR_ERR(tps65910->regmap); 491 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); 492 return ret; 493 } 494 495 init_data->irq = pmic_plat_data->irq; 496 init_data->irq_base = pmic_plat_data->irq_base; 497 498 tps65910_irq_init(tps65910, init_data->irq, init_data); 499 tps65910_ck32k_init(tps65910, pmic_plat_data); 500 tps65910_sleepinit(tps65910, pmic_plat_data); 501 502 if (pmic_plat_data->pm_off && !pm_power_off) { 503 tps65910_i2c_client = i2c; 504 pm_power_off = tps65910_power_off; 505 } 506 507 ret = devm_mfd_add_devices(tps65910->dev, -1, 508 tps65910s, ARRAY_SIZE(tps65910s), 509 NULL, 0, 510 regmap_irq_get_domain(tps65910->irq_data)); 511 if (ret < 0) { 512 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); 513 return ret; 514 } 515 516 return ret; 517 } 518 519 static const struct i2c_device_id tps65910_i2c_id[] = { 520 { "tps65910", TPS65910 }, 521 { "tps65911", TPS65911 }, 522 { } 523 }; 524 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id); 525 526 527 static struct i2c_driver tps65910_i2c_driver = { 528 .driver = { 529 .name = "tps65910", 530 .of_match_table = of_match_ptr(tps65910_of_match), 531 }, 532 .probe = tps65910_i2c_probe, 533 .id_table = tps65910_i2c_id, 534 }; 535 536 static int __init tps65910_i2c_init(void) 537 { 538 return i2c_add_driver(&tps65910_i2c_driver); 539 } 540 /* init early so consumer devices can complete system boot */ 541 subsys_initcall(tps65910_i2c_init); 542 543 static void __exit tps65910_i2c_exit(void) 544 { 545 i2c_del_driver(&tps65910_i2c_driver); 546 } 547 module_exit(tps65910_i2c_exit); 548 549 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); 550 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>"); 551 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver"); 552 MODULE_LICENSE("GPL"); 553