drivers/mfd/tps65910.c

   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         /*
 440          * The PWR_OFF bit needs to be set separately, before transitioning
 441          * to the OFF state. It enables the "sequential" power-off mode on
 442          * TPS65911, it's a NO-OP on TPS65910.
 443          */
 444         if (regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL,
 445                             DEVCTRL_PWR_OFF_MASK) < 0)
 446                 return;
 447
 448         regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL,
 449                            DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK,
 450                            DEVCTRL_DEV_OFF_MASK);
 451 }
 452
 453 static int tps65910_i2c_probe(struct i2c_client *i2c,
 454                               const struct i2c_device_id *id)
 455 {
 456         struct tps65910 *tps65910;
 457         struct tps65910_board *pmic_plat_data;
 458         struct tps65910_board *of_pmic_plat_data = NULL;
 459         struct tps65910_platform_data *init_data;
 460         unsigned long chip_id = id->driver_data;
 461         int ret;
 462
 463         pmic_plat_data = dev_get_platdata(&i2c->dev);
 464
 465         if (!pmic_plat_data && i2c->dev.of_node) {
 466                 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
 467                 of_pmic_plat_data = pmic_plat_data;
 468         }
 469
 470         if (!pmic_plat_data)
 471                 return -EINVAL;
 472
 473         init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
 474         if (init_data == NULL)
 475                 return -ENOMEM;
 476
 477         tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
 478         if (tps65910 == NULL)
 479                 return -ENOMEM;
 480
 481         tps65910->of_plat_data = of_pmic_plat_data;
 482         i2c_set_clientdata(i2c, tps65910);
 483         tps65910->dev = &i2c->dev;
 484         tps65910->i2c_client = i2c;
 485         tps65910->id = chip_id;
 486
 487         /* Work around silicon erratum SWCZ010: the tps65910 may miss the
 488          * first I2C transfer. So issue a dummy transfer before the first
 489          * real transfer.
 490          */
 491         i2c_master_send(i2c, "", 1);
 492         tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
 493         if (IS_ERR(tps65910->regmap)) {
 494                 ret = PTR_ERR(tps65910->regmap);
 495                 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
 496                 return ret;
 497         }
 498
 499         init_data->irq = pmic_plat_data->irq;
 500         init_data->irq_base = pmic_plat_data->irq_base;
 501
 502         tps65910_irq_init(tps65910, init_data->irq, init_data);
 503         tps65910_ck32k_init(tps65910, pmic_plat_data);
 504         tps65910_sleepinit(tps65910, pmic_plat_data);
 505
 506         if (pmic_plat_data->pm_off && !pm_power_off) {
 507                 tps65910_i2c_client = i2c;
 508                 pm_power_off = tps65910_power_off;
 509         }
 510
 511         ret = devm_mfd_add_devices(tps65910->dev, -1,
 512                                    tps65910s, ARRAY_SIZE(tps65910s),
 513                                    NULL, 0,
 514                                    regmap_irq_get_domain(tps65910->irq_data));
 515         if (ret < 0) {
 516                 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
 517                 return ret;
 518         }
 519
 520         return ret;
 521 }
 522
 523 static const struct i2c_device_id tps65910_i2c_id[] = {
 524        { "tps65910", TPS65910 },
 525        { "tps65911", TPS65911 },
 526        { }
 527 };
 528
 529 static struct i2c_driver tps65910_i2c_driver = {
 530         .driver = {
 531                    .name = "tps65910",
 532                    .of_match_table = of_match_ptr(tps65910_of_match),
 533         },
 534         .probe = tps65910_i2c_probe,
 535         .id_table = tps65910_i2c_id,
 536 };
 537
 538 static int __init tps65910_i2c_init(void)
 539 {
 540         return i2c_add_driver(&tps65910_i2c_driver);
 541 }
 542 /* init early so consumer devices can complete system boot */
 543 subsys_initcall(tps65910_i2c_init);