linux/drivers/mfd/tps65910.c
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   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_device.h>
  29
  30static struct resource rtc_resources[] = {
  31        {
  32                .start  = TPS65910_IRQ_RTC_ALARM,
  33                .end    = TPS65910_IRQ_RTC_ALARM,
  34                .flags  = IORESOURCE_IRQ,
  35        }
  36};
  37
  38static struct mfd_cell tps65910s[] = {
  39        {
  40                .name = "tps65910-gpio",
  41        },
  42        {
  43                .name = "tps65910-pmic",
  44        },
  45        {
  46                .name = "tps65910-rtc",
  47                .num_resources = ARRAY_SIZE(rtc_resources),
  48                .resources = &rtc_resources[0],
  49        },
  50        {
  51                .name = "tps65910-power",
  52        },
  53};
  54
  55
  56static const struct regmap_irq tps65911_irqs[] = {
  57        /* INT_STS */
  58        [TPS65911_IRQ_PWRHOLD_F] = {
  59                .mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
  60                .reg_offset = 0,
  61        },
  62        [TPS65911_IRQ_VBAT_VMHI] = {
  63                .mask = INT_MSK_VMBHI_IT_MSK_MASK,
  64                .reg_offset = 0,
  65        },
  66        [TPS65911_IRQ_PWRON] = {
  67                .mask = INT_MSK_PWRON_IT_MSK_MASK,
  68                .reg_offset = 0,
  69        },
  70        [TPS65911_IRQ_PWRON_LP] = {
  71                .mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
  72                .reg_offset = 0,
  73        },
  74        [TPS65911_IRQ_PWRHOLD_R] = {
  75                .mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
  76                .reg_offset = 0,
  77        },
  78        [TPS65911_IRQ_HOTDIE] = {
  79                .mask = INT_MSK_HOTDIE_IT_MSK_MASK,
  80                .reg_offset = 0,
  81        },
  82        [TPS65911_IRQ_RTC_ALARM] = {
  83                .mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
  84                .reg_offset = 0,
  85        },
  86        [TPS65911_IRQ_RTC_PERIOD] = {
  87                .mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
  88                .reg_offset = 0,
  89        },
  90
  91        /* INT_STS2 */
  92        [TPS65911_IRQ_GPIO0_R] = {
  93                .mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
  94                .reg_offset = 1,
  95        },
  96        [TPS65911_IRQ_GPIO0_F] = {
  97                .mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
  98                .reg_offset = 1,
  99        },
 100        [TPS65911_IRQ_GPIO1_R] = {
 101                .mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
 102                .reg_offset = 1,
 103        },
 104        [TPS65911_IRQ_GPIO1_F] = {
 105                .mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
 106                .reg_offset = 1,
 107        },
 108        [TPS65911_IRQ_GPIO2_R] = {
 109                .mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
 110                .reg_offset = 1,
 111        },
 112        [TPS65911_IRQ_GPIO2_F] = {
 113                .mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
 114                .reg_offset = 1,
 115        },
 116        [TPS65911_IRQ_GPIO3_R] = {
 117                .mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
 118                .reg_offset = 1,
 119        },
 120        [TPS65911_IRQ_GPIO3_F] = {
 121                .mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
 122                .reg_offset = 1,
 123        },
 124
 125        /* INT_STS2 */
 126        [TPS65911_IRQ_GPIO4_R] = {
 127                .mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
 128                .reg_offset = 2,
 129        },
 130        [TPS65911_IRQ_GPIO4_F] = {
 131                .mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
 132                .reg_offset = 2,
 133        },
 134        [TPS65911_IRQ_GPIO5_R] = {
 135                .mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
 136                .reg_offset = 2,
 137        },
 138        [TPS65911_IRQ_GPIO5_F] = {
 139                .mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
 140                .reg_offset = 2,
 141        },
 142        [TPS65911_IRQ_WTCHDG] = {
 143                .mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
 144                .reg_offset = 2,
 145        },
 146        [TPS65911_IRQ_VMBCH2_H] = {
 147                .mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
 148                .reg_offset = 2,
 149        },
 150        [TPS65911_IRQ_VMBCH2_L] = {
 151                .mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
 152                .reg_offset = 2,
 153        },
 154        [TPS65911_IRQ_PWRDN] = {
 155                .mask = INT_MSK3_PWRDN_IT_MSK_MASK,
 156                .reg_offset = 2,
 157        },
 158};
 159
 160static const struct regmap_irq tps65910_irqs[] = {
 161        /* INT_STS */
 162        [TPS65910_IRQ_VBAT_VMBDCH] = {
 163                .mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
 164                .reg_offset = 0,
 165        },
 166        [TPS65910_IRQ_VBAT_VMHI] = {
 167                .mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
 168                .reg_offset = 0,
 169        },
 170        [TPS65910_IRQ_PWRON] = {
 171                .mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
 172                .reg_offset = 0,
 173        },
 174        [TPS65910_IRQ_PWRON_LP] = {
 175                .mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
 176                .reg_offset = 0,
 177        },
 178        [TPS65910_IRQ_PWRHOLD] = {
 179                .mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
 180                .reg_offset = 0,
 181        },
 182        [TPS65910_IRQ_HOTDIE] = {
 183                .mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
 184                .reg_offset = 0,
 185        },
 186        [TPS65910_IRQ_RTC_ALARM] = {
 187                .mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
 188                .reg_offset = 0,
 189        },
 190        [TPS65910_IRQ_RTC_PERIOD] = {
 191                .mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
 192                .reg_offset = 0,
 193        },
 194
 195        /* INT_STS2 */
 196        [TPS65910_IRQ_GPIO_R] = {
 197                .mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
 198                .reg_offset = 1,
 199        },
 200        [TPS65910_IRQ_GPIO_F] = {
 201                .mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
 202                .reg_offset = 1,
 203        },
 204};
 205
 206static struct regmap_irq_chip tps65911_irq_chip = {
 207        .name = "tps65910",
 208        .irqs = tps65911_irqs,
 209        .num_irqs = ARRAY_SIZE(tps65911_irqs),
 210        .num_regs = 3,
 211        .irq_reg_stride = 2,
 212        .status_base = TPS65910_INT_STS,
 213        .mask_base = TPS65910_INT_MSK,
 214        .ack_base = TPS65910_INT_STS,
 215};
 216
 217static struct regmap_irq_chip tps65910_irq_chip = {
 218        .name = "tps65910",
 219        .irqs = tps65910_irqs,
 220        .num_irqs = ARRAY_SIZE(tps65910_irqs),
 221        .num_regs = 2,
 222        .irq_reg_stride = 2,
 223        .status_base = TPS65910_INT_STS,
 224        .mask_base = TPS65910_INT_MSK,
 225        .ack_base = TPS65910_INT_STS,
 226};
 227
 228static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
 229                    struct tps65910_platform_data *pdata)
 230{
 231        int ret = 0;
 232        static struct regmap_irq_chip *tps6591x_irqs_chip;
 233
 234        if (!irq) {
 235                dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
 236                return -EINVAL;
 237        }
 238
 239        if (!pdata) {
 240                dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
 241                return -EINVAL;
 242        }
 243
 244        switch (tps65910_chip_id(tps65910)) {
 245        case TPS65910:
 246                tps6591x_irqs_chip = &tps65910_irq_chip;
 247                break;
 248        case TPS65911:
 249                tps6591x_irqs_chip = &tps65911_irq_chip;
 250                break;
 251        }
 252
 253        tps65910->chip_irq = irq;
 254        ret = regmap_add_irq_chip(tps65910->regmap, 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        return ret;
 260}
 261
 262static int tps65910_irq_exit(struct tps65910 *tps65910)
 263{
 264        if (tps65910->chip_irq > 0)
 265                regmap_del_irq_chip(tps65910->chip_irq, tps65910->irq_data);
 266        return 0;
 267}
 268
 269static bool is_volatile_reg(struct device *dev, unsigned int reg)
 270{
 271        struct tps65910 *tps65910 = dev_get_drvdata(dev);
 272
 273        /*
 274         * Caching all regulator registers.
 275         * All regualator register address range is same for
 276         * TPS65910 and TPS65911
 277         */
 278        if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
 279                /* Check for non-existing register */
 280                if (tps65910_chip_id(tps65910) == TPS65910)
 281                        if ((reg == TPS65911_VDDCTRL_OP) ||
 282                                (reg == TPS65911_VDDCTRL_SR))
 283                                return true;
 284                return false;
 285        }
 286        return true;
 287}
 288
 289static const struct regmap_config tps65910_regmap_config = {
 290        .reg_bits = 8,
 291        .val_bits = 8,
 292        .volatile_reg = is_volatile_reg,
 293        .max_register = TPS65910_MAX_REGISTER - 1,
 294        .cache_type = REGCACHE_RBTREE,
 295};
 296
 297static int tps65910_ck32k_init(struct tps65910 *tps65910,
 298                                        struct tps65910_board *pmic_pdata)
 299{
 300        int ret;
 301
 302        if (!pmic_pdata->en_ck32k_xtal)
 303                return 0;
 304
 305        ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
 306                                                DEVCTRL_CK32K_CTRL_MASK);
 307        if (ret < 0) {
 308                dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
 309                return ret;
 310        }
 311
 312        return 0;
 313}
 314
 315static int tps65910_sleepinit(struct tps65910 *tps65910,
 316                struct tps65910_board *pmic_pdata)
 317{
 318        struct device *dev = NULL;
 319        int ret = 0;
 320
 321        dev = tps65910->dev;
 322
 323        if (!pmic_pdata->en_dev_slp)
 324                return 0;
 325
 326        /* enabling SLEEP device state */
 327        ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
 328                                DEVCTRL_DEV_SLP_MASK);
 329        if (ret < 0) {
 330                dev_err(dev, "set dev_slp failed: %d\n", ret);
 331                goto err_sleep_init;
 332        }
 333
 334        /* Return if there is no sleep keepon data. */
 335        if (!pmic_pdata->slp_keepon)
 336                return 0;
 337
 338        if (pmic_pdata->slp_keepon->therm_keepon) {
 339                ret = tps65910_reg_set_bits(tps65910,
 340                                TPS65910_SLEEP_KEEP_RES_ON,
 341                                SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
 342                if (ret < 0) {
 343                        dev_err(dev, "set therm_keepon failed: %d\n", ret);
 344                        goto disable_dev_slp;
 345                }
 346        }
 347
 348        if (pmic_pdata->slp_keepon->clkout32k_keepon) {
 349                ret = tps65910_reg_set_bits(tps65910,
 350                                TPS65910_SLEEP_KEEP_RES_ON,
 351                                SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
 352                if (ret < 0) {
 353                        dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
 354                        goto disable_dev_slp;
 355                }
 356        }
 357
 358        if (pmic_pdata->slp_keepon->i2chs_keepon) {
 359                ret = tps65910_reg_set_bits(tps65910,
 360                                TPS65910_SLEEP_KEEP_RES_ON,
 361                                SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
 362                if (ret < 0) {
 363                        dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
 364                        goto disable_dev_slp;
 365                }
 366        }
 367
 368        return 0;
 369
 370disable_dev_slp:
 371        tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
 372                                DEVCTRL_DEV_SLP_MASK);
 373
 374err_sleep_init:
 375        return ret;
 376}
 377
 378#ifdef CONFIG_OF
 379static struct of_device_id tps65910_of_match[] = {
 380        { .compatible = "ti,tps65910", .data = (void *)TPS65910},
 381        { .compatible = "ti,tps65911", .data = (void *)TPS65911},
 382        { },
 383};
 384MODULE_DEVICE_TABLE(of, tps65910_of_match);
 385
 386static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
 387                                                int *chip_id)
 388{
 389        struct device_node *np = client->dev.of_node;
 390        struct tps65910_board *board_info;
 391        unsigned int prop;
 392        const struct of_device_id *match;
 393        int ret = 0;
 394
 395        match = of_match_device(tps65910_of_match, &client->dev);
 396        if (!match) {
 397                dev_err(&client->dev, "Failed to find matching dt id\n");
 398                return NULL;
 399        }
 400
 401        *chip_id  = (int)match->data;
 402
 403        board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
 404                        GFP_KERNEL);
 405        if (!board_info) {
 406                dev_err(&client->dev, "Failed to allocate pdata\n");
 407                return NULL;
 408        }
 409
 410        ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
 411        if (!ret)
 412                board_info->vmbch_threshold = prop;
 413        else if (*chip_id == TPS65911)
 414                dev_warn(&client->dev, "VMBCH-Threshold not specified");
 415
 416        ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
 417        if (!ret)
 418                board_info->vmbch2_threshold = prop;
 419        else if (*chip_id == TPS65911)
 420                dev_warn(&client->dev, "VMBCH2-Threshold not specified");
 421
 422        prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
 423        board_info->en_ck32k_xtal = prop;
 424
 425        board_info->irq = client->irq;
 426        board_info->irq_base = -1;
 427        board_info->pm_off = of_property_read_bool(np,
 428                        "ti,system-power-controller");
 429
 430        return board_info;
 431}
 432#else
 433static inline
 434struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
 435                                         int *chip_id)
 436{
 437        return NULL;
 438}
 439#endif
 440
 441static struct i2c_client *tps65910_i2c_client;
 442static void tps65910_power_off(void)
 443{
 444        struct tps65910 *tps65910;
 445
 446        tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
 447
 448        if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
 449                        DEVCTRL_PWR_OFF_MASK) < 0)
 450                return;
 451
 452        tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
 453                        DEVCTRL_DEV_ON_MASK);
 454}
 455
 456static int tps65910_i2c_probe(struct i2c_client *i2c,
 457                                        const struct i2c_device_id *id)
 458{
 459        struct tps65910 *tps65910;
 460        struct tps65910_board *pmic_plat_data;
 461        struct tps65910_board *of_pmic_plat_data = NULL;
 462        struct tps65910_platform_data *init_data;
 463        int ret = 0;
 464        int chip_id = id->driver_data;
 465
 466        pmic_plat_data = dev_get_platdata(&i2c->dev);
 467
 468        if (!pmic_plat_data && i2c->dev.of_node) {
 469                pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
 470                of_pmic_plat_data = pmic_plat_data;
 471        }
 472
 473        if (!pmic_plat_data)
 474                return -EINVAL;
 475
 476        init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
 477        if (init_data == NULL)
 478                return -ENOMEM;
 479
 480        tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
 481        if (tps65910 == NULL)
 482                return -ENOMEM;
 483
 484        tps65910->of_plat_data = of_pmic_plat_data;
 485        i2c_set_clientdata(i2c, tps65910);
 486        tps65910->dev = &i2c->dev;
 487        tps65910->i2c_client = i2c;
 488        tps65910->id = chip_id;
 489
 490        tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
 491        if (IS_ERR(tps65910->regmap)) {
 492                ret = PTR_ERR(tps65910->regmap);
 493                dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
 494                return ret;
 495        }
 496
 497        init_data->irq = pmic_plat_data->irq;
 498        init_data->irq_base = pmic_plat_data->irq_base;
 499
 500        tps65910_irq_init(tps65910, init_data->irq, init_data);
 501        tps65910_ck32k_init(tps65910, pmic_plat_data);
 502        tps65910_sleepinit(tps65910, pmic_plat_data);
 503
 504        if (pmic_plat_data->pm_off && !pm_power_off) {
 505                tps65910_i2c_client = i2c;
 506                pm_power_off = tps65910_power_off;
 507        }
 508
 509        ret = mfd_add_devices(tps65910->dev, -1,
 510                              tps65910s, ARRAY_SIZE(tps65910s),
 511                              NULL, 0,
 512                              regmap_irq_get_domain(tps65910->irq_data));
 513        if (ret < 0) {
 514                dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
 515                return ret;
 516        }
 517
 518        return ret;
 519}
 520
 521static int tps65910_i2c_remove(struct i2c_client *i2c)
 522{
 523        struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
 524
 525        tps65910_irq_exit(tps65910);
 526        mfd_remove_devices(tps65910->dev);
 527
 528        return 0;
 529}
 530
 531static const struct i2c_device_id tps65910_i2c_id[] = {
 532       { "tps65910", TPS65910 },
 533       { "tps65911", TPS65911 },
 534       { }
 535};
 536MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
 537
 538
 539static struct i2c_driver tps65910_i2c_driver = {
 540        .driver = {
 541                   .name = "tps65910",
 542                   .owner = THIS_MODULE,
 543                   .of_match_table = of_match_ptr(tps65910_of_match),
 544        },
 545        .probe = tps65910_i2c_probe,
 546        .remove = tps65910_i2c_remove,
 547        .id_table = tps65910_i2c_id,
 548};
 549
 550static int __init tps65910_i2c_init(void)
 551{
 552        return i2c_add_driver(&tps65910_i2c_driver);
 553}
 554/* init early so consumer devices can complete system boot */
 555subsys_initcall(tps65910_i2c_init);
 556
 557static void __exit tps65910_i2c_exit(void)
 558{
 559        i2c_del_driver(&tps65910_i2c_driver);
 560}
 561module_exit(tps65910_i2c_exit);
 562
 563MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
 564MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
 565MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
 566MODULE_LICENSE("GPL");
 567
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