kernel/drivers/mfd/tps65910.c

   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 = regmap_add_irq_chip(tps65910->regmap, tps65910->chip_irq,
 256                 IRQF_ONESHOT, pdata->irq_base,
 257                 tps6591x_irqs_chip, &tps65910->irq_data);
 258         if (ret < 0) {
 259                 dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
 260                 tps65910->chip_irq = 0;
 261         }
 262         return ret;
 263 }
 264
 265 static int tps65910_irq_exit(struct tps65910 *tps65910)
 266 {
 267         if (tps65910->chip_irq > 0)
 268                 regmap_del_irq_chip(tps65910->chip_irq, tps65910->irq_data);
 269         return 0;
 270 }
 271
 272 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 273 {
 274         struct tps65910 *tps65910 = dev_get_drvdata(dev);
 275
 276         /*
 277          * Caching all regulator registers.
 278          * All regualator register address range is same for
 279          * TPS65910 and TPS65911
 280          */
 281         if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
 282                 /* Check for non-existing register */
 283                 if (tps65910_chip_id(tps65910) == TPS65910)
 284                         if ((reg == TPS65911_VDDCTRL_OP) ||
 285                                 (reg == TPS65911_VDDCTRL_SR))
 286                                 return true;
 287                 return false;
 288         }
 289         return true;
 290 }
 291
 292 static const struct regmap_config tps65910_regmap_config = {
 293         .reg_bits = 8,
 294         .val_bits = 8,
 295         .volatile_reg = is_volatile_reg,
 296         .max_register = TPS65910_MAX_REGISTER - 1,
 297         .cache_type = REGCACHE_RBTREE,
 298 };
 299
 300 static int tps65910_ck32k_init(struct tps65910 *tps65910,
 301                                         struct tps65910_board *pmic_pdata)
 302 {
 303         int ret;
 304
 305         if (!pmic_pdata->en_ck32k_xtal)
 306                 return 0;
 307
 308         ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
 309                                                 DEVCTRL_CK32K_CTRL_MASK);
 310         if (ret < 0) {
 311                 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
 312                 return ret;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static int tps65910_sleepinit(struct tps65910 *tps65910,
 319                 struct tps65910_board *pmic_pdata)
 320 {
 321         struct device *dev = NULL;
 322         int ret = 0;
 323
 324         dev = tps65910->dev;
 325
 326         if (!pmic_pdata->en_dev_slp)
 327                 return 0;
 328
 329         /* enabling SLEEP device state */
 330         ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
 331                                 DEVCTRL_DEV_SLP_MASK);
 332         if (ret < 0) {
 333                 dev_err(dev, "set dev_slp failed: %d\n", ret);
 334                 goto err_sleep_init;
 335         }
 336
 337         /* Return if there is no sleep keepon data. */
 338         if (!pmic_pdata->slp_keepon)
 339                 return 0;
 340
 341         if (pmic_pdata->slp_keepon->therm_keepon) {
 342                 ret = tps65910_reg_set_bits(tps65910,
 343                                 TPS65910_SLEEP_KEEP_RES_ON,
 344                                 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
 345                 if (ret < 0) {
 346                         dev_err(dev, "set therm_keepon failed: %d\n", ret);
 347                         goto disable_dev_slp;
 348                 }
 349         }
 350
 351         if (pmic_pdata->slp_keepon->clkout32k_keepon) {
 352                 ret = tps65910_reg_set_bits(tps65910,
 353                                 TPS65910_SLEEP_KEEP_RES_ON,
 354                                 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
 355                 if (ret < 0) {
 356                         dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
 357                         goto disable_dev_slp;
 358                 }
 359         }
 360
 361         if (pmic_pdata->slp_keepon->i2chs_keepon) {
 362                 ret = tps65910_reg_set_bits(tps65910,
 363                                 TPS65910_SLEEP_KEEP_RES_ON,
 364                                 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
 365                 if (ret < 0) {
 366                         dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
 367                         goto disable_dev_slp;
 368                 }
 369         }
 370
 371         return 0;
 372
 373 disable_dev_slp:
 374         tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
 375                                 DEVCTRL_DEV_SLP_MASK);
 376
 377 err_sleep_init:
 378         return ret;
 379 }
 380
 381 #ifdef CONFIG_OF
 382 static const struct of_device_id tps65910_of_match[] = {
 383         { .compatible = "ti,tps65910", .data = (void *)TPS65910},
 384         { .compatible = "ti,tps65911", .data = (void *)TPS65911},
 385         { },
 386 };
 387 MODULE_DEVICE_TABLE(of, tps65910_of_match);
 388
 389 static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
 390                                                 unsigned long *chip_id)
 391 {
 392         struct device_node *np = client->dev.of_node;
 393         struct tps65910_board *board_info;
 394         unsigned int prop;
 395         const struct of_device_id *match;
 396         int ret = 0;
 397
 398         match = of_match_device(tps65910_of_match, &client->dev);
 399         if (!match) {
 400                 dev_err(&client->dev, "Failed to find matching dt id\n");
 401                 return NULL;
 402         }
 403
 404         *chip_id  = (unsigned long)match->data;
 405
 406         board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
 407                         GFP_KERNEL);
 408         if (!board_info) {
 409                 dev_err(&client->dev, "Failed to allocate pdata\n");
 410                 return NULL;
 411         }
 412
 413         ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
 414         if (!ret)
 415                 board_info->vmbch_threshold = prop;
 416
 417         ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
 418         if (!ret)
 419                 board_info->vmbch2_threshold = prop;
 420
 421         prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
 422         board_info->en_ck32k_xtal = prop;
 423
 424         board_info->irq = client->irq;
 425         board_info->irq_base = -1;
 426         board_info->pm_off = of_property_read_bool(np,
 427                         "ti,system-power-controller");
 428
 429         return board_info;
 430 }
 431 #else
 432 static inline
 433 struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
 434                                          unsigned long *chip_id)
 435 {
 436         return NULL;
 437 }
 438 #endif
 439
 440 static struct i2c_client *tps65910_i2c_client;
 441 static void tps65910_power_off(void)
 442 {
 443         struct tps65910 *tps65910;
 444
 445         tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
 446
 447         if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
 448                         DEVCTRL_PWR_OFF_MASK) < 0)
 449                 return;
 450
 451         tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
 452                         DEVCTRL_DEV_ON_MASK);
 453 }
 454
 455 static int tps65910_i2c_probe(struct i2c_client *i2c,
 456                               const struct i2c_device_id *id)
 457 {
 458         struct tps65910 *tps65910;
 459         struct tps65910_board *pmic_plat_data;
 460         struct tps65910_board *of_pmic_plat_data = NULL;
 461         struct tps65910_platform_data *init_data;
 462         unsigned long chip_id = id->driver_data;
 463         int ret = 0;
 464
 465         pmic_plat_data = dev_get_platdata(&i2c->dev);
 466
 467         if (!pmic_plat_data && i2c->dev.of_node) {
 468                 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
 469                 of_pmic_plat_data = pmic_plat_data;
 470         }
 471
 472         if (!pmic_plat_data)
 473                 return -EINVAL;
 474
 475         init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
 476         if (init_data == NULL)
 477                 return -ENOMEM;
 478
 479         tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
 480         if (tps65910 == NULL)
 481                 return -ENOMEM;
 482
 483         tps65910->of_plat_data = of_pmic_plat_data;
 484         i2c_set_clientdata(i2c, tps65910);
 485         tps65910->dev = &i2c->dev;
 486         tps65910->i2c_client = i2c;
 487         tps65910->id = chip_id;
 488
 489         /* Work around silicon erratum SWCZ010: the tps65910 may miss the
 490          * first I2C transfer. So issue a dummy transfer before the first
 491          * real transfer.
 492          */
 493         i2c_master_send(i2c, "", 1);
 494         tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
 495         if (IS_ERR(tps65910->regmap)) {
 496                 ret = PTR_ERR(tps65910->regmap);
 497                 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
 498                 return ret;
 499         }
 500
 501         init_data->irq = pmic_plat_data->irq;
 502         init_data->irq_base = pmic_plat_data->irq_base;
 503
 504         tps65910_irq_init(tps65910, init_data->irq, init_data);
 505         tps65910_ck32k_init(tps65910, pmic_plat_data);
 506         tps65910_sleepinit(tps65910, pmic_plat_data);
 507
 508         if (pmic_plat_data->pm_off && !pm_power_off) {
 509                 tps65910_i2c_client = i2c;
 510                 pm_power_off = tps65910_power_off;
 511         }
 512
 513         ret = mfd_add_devices(tps65910->dev, -1,
 514                               tps65910s, ARRAY_SIZE(tps65910s),
 515                               NULL, 0,
 516                               regmap_irq_get_domain(tps65910->irq_data));
 517         if (ret < 0) {
 518                 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
 519                 tps65910_irq_exit(tps65910);
 520                 return ret;
 521         }
 522
 523         return ret;
 524 }
 525
 526 static int tps65910_i2c_remove(struct i2c_client *i2c)
 527 {
 528         struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
 529
 530         tps65910_irq_exit(tps65910);
 531         mfd_remove_devices(tps65910->dev);
 532
 533         return 0;
 534 }
 535
 536 static const struct i2c_device_id tps65910_i2c_id[] = {
 537        { "tps65910", TPS65910 },
 538        { "tps65911", TPS65911 },
 539        { }
 540 };
 541 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
 542
 543
 544 static struct i2c_driver tps65910_i2c_driver = {
 545         .driver = {
 546                    .name = "tps65910",
 547                    .owner = THIS_MODULE,
 548                    .of_match_table = of_match_ptr(tps65910_of_match),
 549         },
 550         .probe = tps65910_i2c_probe,
 551         .remove = tps65910_i2c_remove,
 552         .id_table = tps65910_i2c_id,
 553 };
 554
 555 static int __init tps65910_i2c_init(void)
 556 {
 557         return i2c_add_driver(&tps65910_i2c_driver);
 558 }
 559 /* init early so consumer devices can complete system boot */
 560 subsys_initcall(tps65910_i2c_init);
 561
 562 static void __exit tps65910_i2c_exit(void)
 563 {
 564         i2c_del_driver(&tps65910_i2c_driver);
 565 }
 566 module_exit(tps65910_i2c_exit);
 567
 568 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 569 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
 570 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
 571 MODULE_LICENSE("GPL");