1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * tps65910.c -- TI TPS6591x chip family multi-function driver 4 * 5 * Copyright 2010 Texas Instruments Inc. 6 * 7 * Author: Graeme Gregory <gg@slimlogic.co.uk> 8 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> 9 */ 10 11 #include <linux/init.h> 12 #include <linux/err.h> 13 #include <linux/slab.h> 14 #include <linux/i2c.h> 15 #include <linux/interrupt.h> 16 #include <linux/irq.h> 17 #include <linux/irqdomain.h> 18 #include <linux/mfd/core.h> 19 #include <linux/regmap.h> 20 #include <linux/mfd/tps65910.h> 21 #include <linux/of.h> 22 #include <linux/of_device.h> 23 24 static const struct resource rtc_resources[] = { 25 { 26 .start = TPS65910_IRQ_RTC_ALARM, 27 .end = TPS65910_IRQ_RTC_ALARM, 28 .flags = IORESOURCE_IRQ, 29 } 30 }; 31 32 static const struct mfd_cell tps65910s[] = { 33 { 34 .name = "tps65910-gpio", 35 }, 36 { 37 .name = "tps65910-pmic", 38 }, 39 { 40 .name = "tps65910-rtc", 41 .num_resources = ARRAY_SIZE(rtc_resources), 42 .resources = &rtc_resources[0], 43 }, 44 { 45 .name = "tps65910-power", 46 }, 47 }; 48 49 50 static const struct regmap_irq tps65911_irqs[] = { 51 /* INT_STS */ 52 [TPS65911_IRQ_PWRHOLD_F] = { 53 .mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK, 54 .reg_offset = 0, 55 }, 56 [TPS65911_IRQ_VBAT_VMHI] = { 57 .mask = INT_MSK_VMBHI_IT_MSK_MASK, 58 .reg_offset = 0, 59 }, 60 [TPS65911_IRQ_PWRON] = { 61 .mask = INT_MSK_PWRON_IT_MSK_MASK, 62 .reg_offset = 0, 63 }, 64 [TPS65911_IRQ_PWRON_LP] = { 65 .mask = INT_MSK_PWRON_LP_IT_MSK_MASK, 66 .reg_offset = 0, 67 }, 68 [TPS65911_IRQ_PWRHOLD_R] = { 69 .mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK, 70 .reg_offset = 0, 71 }, 72 [TPS65911_IRQ_HOTDIE] = { 73 .mask = INT_MSK_HOTDIE_IT_MSK_MASK, 74 .reg_offset = 0, 75 }, 76 [TPS65911_IRQ_RTC_ALARM] = { 77 .mask = INT_MSK_RTC_ALARM_IT_MSK_MASK, 78 .reg_offset = 0, 79 }, 80 [TPS65911_IRQ_RTC_PERIOD] = { 81 .mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK, 82 .reg_offset = 0, 83 }, 84 85 /* INT_STS2 */ 86 [TPS65911_IRQ_GPIO0_R] = { 87 .mask = INT_MSK2_GPIO0_R_IT_MSK_MASK, 88 .reg_offset = 1, 89 }, 90 [TPS65911_IRQ_GPIO0_F] = { 91 .mask = INT_MSK2_GPIO0_F_IT_MSK_MASK, 92 .reg_offset = 1, 93 }, 94 [TPS65911_IRQ_GPIO1_R] = { 95 .mask = INT_MSK2_GPIO1_R_IT_MSK_MASK, 96 .reg_offset = 1, 97 }, 98 [TPS65911_IRQ_GPIO1_F] = { 99 .mask = INT_MSK2_GPIO1_F_IT_MSK_MASK, 100 .reg_offset = 1, 101 }, 102 [TPS65911_IRQ_GPIO2_R] = { 103 .mask = INT_MSK2_GPIO2_R_IT_MSK_MASK, 104 .reg_offset = 1, 105 }, 106 [TPS65911_IRQ_GPIO2_F] = { 107 .mask = INT_MSK2_GPIO2_F_IT_MSK_MASK, 108 .reg_offset = 1, 109 }, 110 [TPS65911_IRQ_GPIO3_R] = { 111 .mask = INT_MSK2_GPIO3_R_IT_MSK_MASK, 112 .reg_offset = 1, 113 }, 114 [TPS65911_IRQ_GPIO3_F] = { 115 .mask = INT_MSK2_GPIO3_F_IT_MSK_MASK, 116 .reg_offset = 1, 117 }, 118 119 /* INT_STS2 */ 120 [TPS65911_IRQ_GPIO4_R] = { 121 .mask = INT_MSK3_GPIO4_R_IT_MSK_MASK, 122 .reg_offset = 2, 123 }, 124 [TPS65911_IRQ_GPIO4_F] = { 125 .mask = INT_MSK3_GPIO4_F_IT_MSK_MASK, 126 .reg_offset = 2, 127 }, 128 [TPS65911_IRQ_GPIO5_R] = { 129 .mask = INT_MSK3_GPIO5_R_IT_MSK_MASK, 130 .reg_offset = 2, 131 }, 132 [TPS65911_IRQ_GPIO5_F] = { 133 .mask = INT_MSK3_GPIO5_F_IT_MSK_MASK, 134 .reg_offset = 2, 135 }, 136 [TPS65911_IRQ_WTCHDG] = { 137 .mask = INT_MSK3_WTCHDG_IT_MSK_MASK, 138 .reg_offset = 2, 139 }, 140 [TPS65911_IRQ_VMBCH2_H] = { 141 .mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK, 142 .reg_offset = 2, 143 }, 144 [TPS65911_IRQ_VMBCH2_L] = { 145 .mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK, 146 .reg_offset = 2, 147 }, 148 [TPS65911_IRQ_PWRDN] = { 149 .mask = INT_MSK3_PWRDN_IT_MSK_MASK, 150 .reg_offset = 2, 151 }, 152 }; 153 154 static const struct regmap_irq tps65910_irqs[] = { 155 /* INT_STS */ 156 [TPS65910_IRQ_VBAT_VMBDCH] = { 157 .mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK, 158 .reg_offset = 0, 159 }, 160 [TPS65910_IRQ_VBAT_VMHI] = { 161 .mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK, 162 .reg_offset = 0, 163 }, 164 [TPS65910_IRQ_PWRON] = { 165 .mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK, 166 .reg_offset = 0, 167 }, 168 [TPS65910_IRQ_PWRON_LP] = { 169 .mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK, 170 .reg_offset = 0, 171 }, 172 [TPS65910_IRQ_PWRHOLD] = { 173 .mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK, 174 .reg_offset = 0, 175 }, 176 [TPS65910_IRQ_HOTDIE] = { 177 .mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK, 178 .reg_offset = 0, 179 }, 180 [TPS65910_IRQ_RTC_ALARM] = { 181 .mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK, 182 .reg_offset = 0, 183 }, 184 [TPS65910_IRQ_RTC_PERIOD] = { 185 .mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK, 186 .reg_offset = 0, 187 }, 188 189 /* INT_STS2 */ 190 [TPS65910_IRQ_GPIO_R] = { 191 .mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK, 192 .reg_offset = 1, 193 }, 194 [TPS65910_IRQ_GPIO_F] = { 195 .mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK, 196 .reg_offset = 1, 197 }, 198 }; 199 200 static struct regmap_irq_chip tps65911_irq_chip = { 201 .name = "tps65910", 202 .irqs = tps65911_irqs, 203 .num_irqs = ARRAY_SIZE(tps65911_irqs), 204 .num_regs = 3, 205 .irq_reg_stride = 2, 206 .status_base = TPS65910_INT_STS, 207 .mask_base = TPS65910_INT_MSK, 208 .ack_base = TPS65910_INT_STS, 209 }; 210 211 static struct regmap_irq_chip tps65910_irq_chip = { 212 .name = "tps65910", 213 .irqs = tps65910_irqs, 214 .num_irqs = ARRAY_SIZE(tps65910_irqs), 215 .num_regs = 2, 216 .irq_reg_stride = 2, 217 .status_base = TPS65910_INT_STS, 218 .mask_base = TPS65910_INT_MSK, 219 .ack_base = TPS65910_INT_STS, 220 }; 221 222 static int tps65910_irq_init(struct tps65910 *tps65910, int irq, 223 struct tps65910_platform_data *pdata) 224 { 225 int ret; 226 static struct regmap_irq_chip *tps6591x_irqs_chip; 227 228 if (!irq) { 229 dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n"); 230 return -EINVAL; 231 } 232 233 if (!pdata) { 234 dev_warn(tps65910->dev, "No interrupt support, no pdata\n"); 235 return -EINVAL; 236 } 237 238 switch (tps65910_chip_id(tps65910)) { 239 case TPS65910: 240 tps6591x_irqs_chip = &tps65910_irq_chip; 241 break; 242 case TPS65911: 243 tps6591x_irqs_chip = &tps65911_irq_chip; 244 break; 245 } 246 247 tps65910->chip_irq = irq; 248 ret = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap, 249 tps65910->chip_irq, 250 IRQF_ONESHOT, pdata->irq_base, 251 tps6591x_irqs_chip, &tps65910->irq_data); 252 if (ret < 0) { 253 dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret); 254 tps65910->chip_irq = 0; 255 } 256 return ret; 257 } 258 259 static bool is_volatile_reg(struct device *dev, unsigned int reg) 260 { 261 struct tps65910 *tps65910 = dev_get_drvdata(dev); 262 263 /* 264 * Caching all regulator registers. 265 * All regualator register address range is same for 266 * TPS65910 and TPS65911 267 */ 268 if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) { 269 /* Check for non-existing register */ 270 if (tps65910_chip_id(tps65910) == TPS65910) 271 if ((reg == TPS65911_VDDCTRL_OP) || 272 (reg == TPS65911_VDDCTRL_SR)) 273 return true; 274 return false; 275 } 276 return true; 277 } 278 279 static const struct regmap_config tps65910_regmap_config = { 280 .reg_bits = 8, 281 .val_bits = 8, 282 .volatile_reg = is_volatile_reg, 283 .max_register = TPS65910_MAX_REGISTER - 1, 284 .cache_type = REGCACHE_RBTREE, 285 }; 286 287 static int tps65910_ck32k_init(struct tps65910 *tps65910, 288 struct tps65910_board *pmic_pdata) 289 { 290 int ret; 291 292 if (!pmic_pdata->en_ck32k_xtal) 293 return 0; 294 295 ret = regmap_clear_bits(tps65910->regmap, TPS65910_DEVCTRL, 296 DEVCTRL_CK32K_CTRL_MASK); 297 if (ret < 0) { 298 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret); 299 return ret; 300 } 301 302 return 0; 303 } 304 305 static int tps65910_sleepinit(struct tps65910 *tps65910, 306 struct tps65910_board *pmic_pdata) 307 { 308 struct device *dev; 309 int ret; 310 311 if (!pmic_pdata->en_dev_slp) 312 return 0; 313 314 dev = tps65910->dev; 315 316 /* enabling SLEEP device state */ 317 ret = regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL, 318 DEVCTRL_DEV_SLP_MASK); 319 if (ret < 0) { 320 dev_err(dev, "set dev_slp failed: %d\n", ret); 321 goto err_sleep_init; 322 } 323 324 if (pmic_pdata->slp_keepon.therm_keepon) { 325 ret = regmap_set_bits(tps65910->regmap, 326 TPS65910_SLEEP_KEEP_RES_ON, 327 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK); 328 if (ret < 0) { 329 dev_err(dev, "set therm_keepon failed: %d\n", ret); 330 goto disable_dev_slp; 331 } 332 } 333 334 if (pmic_pdata->slp_keepon.clkout32k_keepon) { 335 ret = regmap_set_bits(tps65910->regmap, 336 TPS65910_SLEEP_KEEP_RES_ON, 337 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK); 338 if (ret < 0) { 339 dev_err(dev, "set clkout32k_keepon failed: %d\n", ret); 340 goto disable_dev_slp; 341 } 342 } 343 344 if (pmic_pdata->slp_keepon.i2chs_keepon) { 345 ret = regmap_set_bits(tps65910->regmap, 346 TPS65910_SLEEP_KEEP_RES_ON, 347 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK); 348 if (ret < 0) { 349 dev_err(dev, "set i2chs_keepon failed: %d\n", ret); 350 goto disable_dev_slp; 351 } 352 } 353 354 return 0; 355 356 disable_dev_slp: 357 regmap_clear_bits(tps65910->regmap, TPS65910_DEVCTRL, 358 DEVCTRL_DEV_SLP_MASK); 359 360 err_sleep_init: 361 return ret; 362 } 363 364 #ifdef CONFIG_OF 365 static const struct of_device_id tps65910_of_match[] = { 366 { .compatible = "ti,tps65910", .data = (void *)TPS65910}, 367 { .compatible = "ti,tps65911", .data = (void *)TPS65911}, 368 { }, 369 }; 370 371 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, 372 unsigned long *chip_id) 373 { 374 struct device_node *np = client->dev.of_node; 375 struct tps65910_board *board_info; 376 unsigned int prop; 377 const struct of_device_id *match; 378 int ret; 379 380 match = of_match_device(tps65910_of_match, &client->dev); 381 if (!match) { 382 dev_err(&client->dev, "Failed to find matching dt id\n"); 383 return NULL; 384 } 385 386 *chip_id = (unsigned long)match->data; 387 388 board_info = devm_kzalloc(&client->dev, sizeof(*board_info), 389 GFP_KERNEL); 390 if (!board_info) 391 return NULL; 392 393 ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop); 394 if (!ret) 395 board_info->vmbch_threshold = prop; 396 397 ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop); 398 if (!ret) 399 board_info->vmbch2_threshold = prop; 400 401 prop = of_property_read_bool(np, "ti,en-ck32k-xtal"); 402 board_info->en_ck32k_xtal = prop; 403 404 prop = of_property_read_bool(np, "ti,sleep-enable"); 405 board_info->en_dev_slp = prop; 406 407 prop = of_property_read_bool(np, "ti,sleep-keep-therm"); 408 board_info->slp_keepon.therm_keepon = prop; 409 410 prop = of_property_read_bool(np, "ti,sleep-keep-ck32k"); 411 board_info->slp_keepon.clkout32k_keepon = prop; 412 413 prop = of_property_read_bool(np, "ti,sleep-keep-hsclk"); 414 board_info->slp_keepon.i2chs_keepon = prop; 415 416 board_info->irq = client->irq; 417 board_info->irq_base = -1; 418 board_info->pm_off = of_property_read_bool(np, 419 "ti,system-power-controller"); 420 421 return board_info; 422 } 423 #else 424 static inline 425 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client, 426 unsigned long *chip_id) 427 { 428 return NULL; 429 } 430 #endif 431 432 static struct i2c_client *tps65910_i2c_client; 433 static void tps65910_power_off(void) 434 { 435 struct tps65910 *tps65910; 436 437 tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev); 438 439 regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL, 440 DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK, 441 DEVCTRL_DEV_OFF_MASK); 442 } 443 444 static int tps65910_i2c_probe(struct i2c_client *i2c) 445 { 446 const struct i2c_device_id *id = i2c_client_get_device_id(i2c); 447 struct tps65910 *tps65910; 448 struct tps65910_board *pmic_plat_data; 449 struct tps65910_board *of_pmic_plat_data = NULL; 450 struct tps65910_platform_data *init_data; 451 unsigned long chip_id = id->driver_data; 452 int ret; 453 454 pmic_plat_data = dev_get_platdata(&i2c->dev); 455 456 if (!pmic_plat_data && i2c->dev.of_node) { 457 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id); 458 of_pmic_plat_data = pmic_plat_data; 459 } 460 461 if (!pmic_plat_data) 462 return -EINVAL; 463 464 init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL); 465 if (init_data == NULL) 466 return -ENOMEM; 467 468 tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL); 469 if (tps65910 == NULL) 470 return -ENOMEM; 471 472 tps65910->of_plat_data = of_pmic_plat_data; 473 i2c_set_clientdata(i2c, tps65910); 474 tps65910->dev = &i2c->dev; 475 tps65910->i2c_client = i2c; 476 tps65910->id = chip_id; 477 478 /* Work around silicon erratum SWCZ010: the tps65910 may miss the 479 * first I2C transfer. So issue a dummy transfer before the first 480 * real transfer. 481 */ 482 i2c_master_send(i2c, "", 1); 483 tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config); 484 if (IS_ERR(tps65910->regmap)) { 485 ret = PTR_ERR(tps65910->regmap); 486 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); 487 return ret; 488 } 489 490 init_data->irq = pmic_plat_data->irq; 491 init_data->irq_base = pmic_plat_data->irq_base; 492 493 tps65910_irq_init(tps65910, init_data->irq, init_data); 494 tps65910_ck32k_init(tps65910, pmic_plat_data); 495 tps65910_sleepinit(tps65910, pmic_plat_data); 496 497 if (pmic_plat_data->pm_off && !pm_power_off) { 498 /* 499 * The PWR_OFF bit needs to be set separately, before 500 * transitioning to the OFF state. It enables the "sequential" 501 * power-off mode on TPS65911, it's a NO-OP on TPS65910. 502 */ 503 ret = regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL, 504 DEVCTRL_PWR_OFF_MASK); 505 if (ret) { 506 dev_err(&i2c->dev, "failed to set power-off mode: %d\n", 507 ret); 508 return ret; 509 } 510 511 tps65910_i2c_client = i2c; 512 pm_power_off = tps65910_power_off; 513 } 514 515 ret = devm_mfd_add_devices(tps65910->dev, -1, 516 tps65910s, ARRAY_SIZE(tps65910s), 517 NULL, 0, 518 regmap_irq_get_domain(tps65910->irq_data)); 519 if (ret < 0) { 520 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); 521 return ret; 522 } 523 524 return ret; 525 } 526 527 static const struct i2c_device_id tps65910_i2c_id[] = { 528 { "tps65910", TPS65910 }, 529 { "tps65911", TPS65911 }, 530 { } 531 }; 532 533 static struct i2c_driver tps65910_i2c_driver = { 534 .driver = { 535 .name = "tps65910", 536 .of_match_table = of_match_ptr(tps65910_of_match), 537 }, 538 .probe = tps65910_i2c_probe, 539 .id_table = tps65910_i2c_id, 540 }; 541 542 static int __init tps65910_i2c_init(void) 543 { 544 return i2c_add_driver(&tps65910_i2c_driver); 545 } 546 /* init early so consumer devices can complete system boot */ 547 subsys_initcall(tps65910_i2c_init); 548