drivers/mfd/tps65910.c

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