drivers/mfd/tps65010.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * tps65010 - driver for tps6501x power management chips
   4  *
   5  * Copyright (C) 2004 Texas Instruments
   6  * Copyright (C) 2004-2005 David Brownell
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/i2c.h>
  15 #include <linux/delay.h>
  16 #include <linux/workqueue.h>
  17 #include <linux/debugfs.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/mutex.h>
  20 #include <linux/platform_device.h>
  21
  22 #include <linux/mfd/tps65010.h>
  23
  24 #include <linux/gpio/driver.h>
  25
  26
  27 /*-------------------------------------------------------------------------*/
  28
  29 #define DRIVER_VERSION  "2 May 2005"
  30 #define DRIVER_NAME     (tps65010_driver.driver.name)
  31
  32 MODULE_DESCRIPTION("TPS6501x Power Management Driver");
  33 MODULE_LICENSE("GPL");
  34
  35 static struct i2c_driver tps65010_driver;
  36
  37 /*-------------------------------------------------------------------------*/
  38
  39 /* This driver handles a family of multipurpose chips, which incorporate
  40  * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
  41  * and other features often needed in portable devices like cell phones
  42  * or digital cameras.
  43  *
  44  * The tps65011 and tps65013 have different voltage settings compared
  45  * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
  46  * All except tps65010 have "wait" mode, possibly defaulted so that
  47  * battery-insert != device-on.
  48  *
  49  * We could distinguish between some models by checking VDCDC1.UVLO or
  50  * other registers, unless they've been changed already after powerup
  51  * as part of board setup by a bootloader.
  52  */
  53 enum tps_model {
  54         TPS65010,
  55         TPS65011,
  56         TPS65012,
  57         TPS65013,
  58 };
  59
  60 struct tps65010 {
  61         struct i2c_client       *client;
  62         struct mutex            lock;
  63         struct delayed_work     work;
  64         struct dentry           *file;
  65         unsigned                charging:1;
  66         unsigned                por:1;
  67         unsigned                model:8;
  68         u16                     vbus;
  69         unsigned long           flags;
  70 #define FLAG_VBUS_CHANGED       0
  71 #define FLAG_IRQ_ENABLE         1
  72
  73         /* copies of last register state */
  74         u8                      chgstatus, regstatus, chgconf;
  75         u8                      nmask1, nmask2;
  76
  77         u8                      outmask;
  78         struct gpio_chip        chip;
  79         struct platform_device  *leds;
  80 };
  81
  82 #define POWER_POLL_DELAY        msecs_to_jiffies(5000)
  83
  84 /*-------------------------------------------------------------------------*/
  85
  86 #if     defined(DEBUG) || defined(CONFIG_DEBUG_FS)
  87
  88 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
  89 {
  90         snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
  91                 chgstatus,
  92                 (chgstatus & TPS_CHG_USB) ? " USB" : "",
  93                 (chgstatus & TPS_CHG_AC) ? " AC" : "",
  94                 (chgstatus & TPS_CHG_THERM) ? " therm" : "",
  95                 (chgstatus & TPS_CHG_TERM) ? " done" :
  96                         ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
  97                                 ? " (charging)" : ""),
  98                 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
  99                 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
 100                 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
 101                 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
 102 }
 103
 104 static void dbg_regstat(char *buf, size_t len, u8 regstatus)
 105 {
 106         snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
 107                 regstatus,
 108                 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
 109                 (regstatus & TPS_REG_COVER) ? " uncover" : "",
 110                 (regstatus & TPS_REG_UVLO) ? " UVLO" : "",
 111                 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
 112                 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
 113                 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
 114                 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
 115                 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
 116 }
 117
 118 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
 119 {
 120         const char *hibit;
 121
 122         if (por)
 123                 hibit = (chgconfig & TPS_CHARGE_POR)
 124                                 ? "POR=69ms" : "POR=1sec";
 125         else
 126                 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";
 127
 128         snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
 129                 chgconfig, hibit,
 130                 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
 131                 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
 132                 ({int p; switch ((chgconfig >> 3) & 3) {
 133                 case 3:         p = 100; break;
 134                 case 2:         p = 75; break;
 135                 case 1:         p = 50; break;
 136                 default:        p = 25; break;
 137                 }; p; }),
 138                 (chgconfig & TPS_VBUS_CHARGING)
 139                         ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
 140                         : 0,
 141                 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
 142 }
 143
 144 #endif
 145
 146 #ifdef  DEBUG
 147
 148 static void show_chgstatus(const char *label, u8 chgstatus)
 149 {
 150         char buf [100];
 151
 152         dbg_chgstat(buf, sizeof buf, chgstatus);
 153         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 154 }
 155
 156 static void show_regstatus(const char *label, u8 regstatus)
 157 {
 158         char buf [100];
 159
 160         dbg_regstat(buf, sizeof buf, regstatus);
 161         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 162 }
 163
 164 static void show_chgconfig(int por, const char *label, u8 chgconfig)
 165 {
 166         char buf [100];
 167
 168         dbg_chgconf(por, buf, sizeof buf, chgconfig);
 169         pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
 170 }
 171
 172 #else
 173
 174 static inline void show_chgstatus(const char *label, u8 chgstatus) { }
 175 static inline void show_regstatus(const char *label, u8 chgstatus) { }
 176 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }
 177
 178 #endif
 179
 180 #ifdef  CONFIG_DEBUG_FS
 181
 182 static int dbg_show(struct seq_file *s, void *_)
 183 {
 184         struct tps65010 *tps = s->private;
 185         u8              value, v2;
 186         unsigned        i;
 187         char            buf[100];
 188         const char      *chip;
 189
 190         switch (tps->model) {
 191         case TPS65010:  chip = "tps65010"; break;
 192         case TPS65011:  chip = "tps65011"; break;
 193         case TPS65012:  chip = "tps65012"; break;
 194         case TPS65013:  chip = "tps65013"; break;
 195         default:        chip = NULL; break;
 196         }
 197         seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
 198                         DRIVER_NAME, DRIVER_VERSION, chip);
 199
 200         mutex_lock(&tps->lock);
 201
 202         /* FIXME how can we tell whether a battery is present?
 203          * likely involves a charge gauging chip (like BQ26501).
 204          */
 205
 206         seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");
 207
 208
 209         /* registers for monitoring battery charging and status; note
 210          * that reading chgstat and regstat may ack IRQs...
 211          */
 212         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 213         dbg_chgconf(tps->por, buf, sizeof buf, value);
 214         seq_printf(s, "chgconfig %s", buf);
 215
 216         value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 217         dbg_chgstat(buf, sizeof buf, value);
 218         seq_printf(s, "chgstat   %s", buf);
 219         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
 220         dbg_chgstat(buf, sizeof buf, value);
 221         seq_printf(s, "mask1     %s", buf);
 222         /* ignore ackint1 */
 223
 224         value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 225         dbg_regstat(buf, sizeof buf, value);
 226         seq_printf(s, "regstat   %s", buf);
 227         value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
 228         dbg_regstat(buf, sizeof buf, value);
 229         seq_printf(s, "mask2     %s\n", buf);
 230         /* ignore ackint2 */
 231
 232         queue_delayed_work(system_power_efficient_wq, &tps->work,
 233                            POWER_POLL_DELAY);
 234
 235         /* VMAIN voltage, enable lowpower, etc */
 236         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
 237         seq_printf(s, "vdcdc1    %02x\n", value);
 238
 239         /* VCORE voltage, vibrator on/off */
 240         value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
 241         seq_printf(s, "vdcdc2    %02x\n", value);
 242
 243         /* both LD0s, and their lowpower behavior */
 244         value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
 245         seq_printf(s, "vregs1    %02x\n\n", value);
 246
 247
 248         /* LEDs and GPIOs */
 249         value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
 250         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
 251         seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
 252                 (value & 0x80)
 253                         ? ((v2 & 0x80) ? "on" : "off")
 254                         : ((v2 & 0x80) ? "blink" : "(nPG)"),
 255                 value, v2,
 256                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 257
 258         value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
 259         v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
 260         seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
 261                 (value & 0x80)
 262                         ? ((v2 & 0x80) ? "on" : "off")
 263                         : ((v2 & 0x80) ? "blink" : "off"),
 264                 value, v2,
 265                 (value & 0x7f) * 10, (v2 & 0x7f) * 100);
 266
 267         value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 268         v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
 269         seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);
 270
 271         for (i = 0; i < 4; i++) {
 272                 if (value & (1 << (4 + i)))
 273                         seq_printf(s, "  gpio%d-out %s\n", i + 1,
 274                                 (value & (1 << i)) ? "low" : "hi ");
 275                 else
 276                         seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
 277                                 (value & (1 << i)) ? "hi " : "low",
 278                                 (v2 & (1 << i)) ? "no-irq" : "irq",
 279                                 (v2 & (1 << (4 + i))) ? "rising" : "falling");
 280         }
 281
 282         mutex_unlock(&tps->lock);
 283         return 0;
 284 }
 285
 286 static int dbg_tps_open(struct inode *inode, struct file *file)
 287 {
 288         return single_open(file, dbg_show, inode->i_private);
 289 }
 290
 291 static const struct file_operations debug_fops = {
 292         .open           = dbg_tps_open,
 293         .read           = seq_read,
 294         .llseek         = seq_lseek,
 295         .release        = single_release,
 296 };
 297
 298 #define DEBUG_FOPS      &debug_fops
 299
 300 #else
 301 #define DEBUG_FOPS      NULL
 302 #endif
 303
 304 /*-------------------------------------------------------------------------*/
 305
 306 /* handle IRQS in a task context, so we can use I2C calls */
 307 static void tps65010_interrupt(struct tps65010 *tps)
 308 {
 309         u8 tmp = 0, mask, poll;
 310
 311         /* IRQs won't trigger for certain events, but we can get
 312          * others by polling (normally, with external power applied).
 313          */
 314         poll = 0;
 315
 316         /* regstatus irqs */
 317         if (tps->nmask2) {
 318                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
 319                 mask = tmp ^ tps->regstatus;
 320                 tps->regstatus = tmp;
 321                 mask &= tps->nmask2;
 322         } else
 323                 mask = 0;
 324         if (mask) {
 325                 tps->regstatus =  tmp;
 326                 /* may need to shut something down ... */
 327
 328                 /* "off" usually means deep sleep */
 329                 if (tmp & TPS_REG_ONOFF) {
 330                         pr_info("%s: power off button\n", DRIVER_NAME);
 331 #if 0
 332                         /* REVISIT:  this might need its own workqueue
 333                          * plus tweaks including deadlock avoidance ...
 334                          * also needs to get error handling and probably
 335                          * an #ifdef CONFIG_HIBERNATION
 336                          */
 337                         hibernate();
 338 #endif
 339                         poll = 1;
 340                 }
 341         }
 342
 343         /* chgstatus irqs */
 344         if (tps->nmask1) {
 345                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
 346                 mask = tmp ^ tps->chgstatus;
 347                 tps->chgstatus = tmp;
 348                 mask &= tps->nmask1;
 349         } else
 350                 mask = 0;
 351         if (mask) {
 352                 unsigned        charging = 0;
 353
 354                 show_chgstatus("chg/irq", tmp);
 355                 if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
 356                         show_chgconfig(tps->por, "conf", tps->chgconf);
 357
 358                 /* Unless it was turned off or disabled, we charge any
 359                  * battery whenever there's power available for it
 360                  * and the charger hasn't been disabled.
 361                  */
 362                 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
 363                                 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 364                                 && (tps->chgconf & TPS_CHARGE_ENABLE)
 365                                 ) {
 366                         if (tps->chgstatus & TPS_CHG_USB) {
 367                                 /* VBUS options are readonly until reconnect */
 368                                 if (mask & TPS_CHG_USB)
 369                                         set_bit(FLAG_VBUS_CHANGED, &tps->flags);
 370                                 charging = 1;
 371                         } else if (tps->chgstatus & TPS_CHG_AC)
 372                                 charging = 1;
 373                 }
 374                 if (charging != tps->charging) {
 375                         tps->charging = charging;
 376                         pr_info("%s: battery %scharging\n",
 377                                 DRIVER_NAME, charging ? "" :
 378                                 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
 379                                         ? "NOT " : "dis"));
 380                 }
 381         }
 382
 383         /* always poll to detect (a) power removal, without tps65013
 384          * NO_CHG IRQ; or (b) restart of charging after stop.
 385          */
 386         if ((tps->model != TPS65013 || !tps->charging)
 387                         && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
 388                 poll = 1;
 389         if (poll)
 390                 queue_delayed_work(system_power_efficient_wq, &tps->work,
 391                                    POWER_POLL_DELAY);
 392
 393         /* also potentially gpio-in rise or fall */
 394 }
 395
 396 /* handle IRQs and polling using keventd for now */
 397 static void tps65010_work(struct work_struct *work)
 398 {
 399         struct tps65010         *tps;
 400
 401         tps = container_of(to_delayed_work(work), struct tps65010, work);
 402         mutex_lock(&tps->lock);
 403
 404         tps65010_interrupt(tps);
 405
 406         if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
 407                 u8      chgconfig, tmp;
 408
 409                 chgconfig = i2c_smbus_read_byte_data(tps->client,
 410                                         TPS_CHGCONFIG);
 411                 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
 412                 if (tps->vbus == 500)
 413                         chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
 414                 else if (tps->vbus >= 100)
 415                         chgconfig |= TPS_VBUS_CHARGING;
 416
 417                 i2c_smbus_write_byte_data(tps->client,
 418                                           TPS_CHGCONFIG, chgconfig);
 419
 420                 /* vbus update fails unless VBUS is connected! */
 421                 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
 422                 tps->chgconf = tmp;
 423                 show_chgconfig(tps->por, "update vbus", tmp);
 424         }
 425
 426         if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
 427                 enable_irq(tps->client->irq);
 428
 429         mutex_unlock(&tps->lock);
 430 }
 431
 432 static irqreturn_t tps65010_irq(int irq, void *_tps)
 433 {
 434         struct tps65010         *tps = _tps;
 435
 436         disable_irq_nosync(irq);
 437         set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 438         queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
 439         return IRQ_HANDLED;
 440 }
 441
 442 /*-------------------------------------------------------------------------*/
 443
 444 /* offsets 0..3 == GPIO1..GPIO4
 445  * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
 446  * offset 6 == vibrator motor driver
 447  */
 448 static void
 449 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 450 {
 451         if (offset < 4)
 452                 tps65010_set_gpio_out_value(offset + 1, value);
 453         else if (offset < 6)
 454                 tps65010_set_led(offset - 3, value ? ON : OFF);
 455         else
 456                 tps65010_set_vib(value);
 457 }
 458
 459 static int
 460 tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
 461 {
 462         /* GPIOs may be input-only */
 463         if (offset < 4) {
 464                 struct tps65010         *tps;
 465
 466                 tps = gpiochip_get_data(chip);
 467                 if (!(tps->outmask & (1 << offset)))
 468                         return -EINVAL;
 469                 tps65010_set_gpio_out_value(offset + 1, value);
 470         } else if (offset < 6)
 471                 tps65010_set_led(offset - 3, value ? ON : OFF);
 472         else
 473                 tps65010_set_vib(value);
 474
 475         return 0;
 476 }
 477
 478 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
 479 {
 480         int                     value;
 481         struct tps65010         *tps;
 482
 483         tps = gpiochip_get_data(chip);
 484
 485         if (offset < 4) {
 486                 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
 487                 if (value < 0)
 488                         return value;
 489                 if (value & (1 << (offset + 4)))        /* output */
 490                         return !(value & (1 << offset));
 491                 else                                    /* input */
 492                         return !!(value & (1 << offset));
 493         }
 494
 495         /* REVISIT we *could* report LED1/nPG and LED2 state ... */
 496         return 0;
 497 }
 498
 499
 500 /*-------------------------------------------------------------------------*/
 501
 502 static struct tps65010 *the_tps;
 503
 504 static void tps65010_remove(struct i2c_client *client)
 505 {
 506         struct tps65010         *tps = i2c_get_clientdata(client);
 507         struct tps65010_board   *board = dev_get_platdata(&client->dev);
 508
 509         if (board && board->teardown)
 510                 board->teardown(client, &tps->chip);
 511         if (client->irq > 0)
 512                 free_irq(client->irq, tps);
 513         cancel_delayed_work_sync(&tps->work);
 514         debugfs_remove(tps->file);
 515         the_tps = NULL;
 516 }
 517
 518 static int tps65010_probe(struct i2c_client *client)
 519 {
 520         const struct i2c_device_id *id = i2c_client_get_device_id(client);
 521         struct tps65010         *tps;
 522         int                     status;
 523         struct tps65010_board   *board = dev_get_platdata(&client->dev);
 524
 525         if (the_tps) {
 526                 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
 527                 return -ENODEV;
 528         }
 529
 530         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 531                 return -EINVAL;
 532
 533         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 534         if (!tps)
 535                 return -ENOMEM;
 536
 537         mutex_init(&tps->lock);
 538         INIT_DELAYED_WORK(&tps->work, tps65010_work);
 539         tps->client = client;
 540         tps->model = id->driver_data;
 541
 542         /* the IRQ is active low, but many gpio lines can't support that
 543          * so this driver uses falling-edge triggers instead.
 544          */
 545         if (client->irq > 0) {
 546                 status = request_irq(client->irq, tps65010_irq,
 547                                      IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
 548                 if (status < 0) {
 549                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 550                                         client->irq, status);
 551                         return status;
 552                 }
 553                 /* annoying race here, ideally we'd have an option
 554                  * to claim the irq now and enable it later.
 555                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
 556                  */
 557                 disable_irq(client->irq);
 558                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 559         } else
 560                 dev_warn(&client->dev, "IRQ not configured!\n");
 561
 562
 563         switch (tps->model) {
 564         case TPS65010:
 565         case TPS65012:
 566                 tps->por = 1;
 567                 break;
 568         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 569         }
 570         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 571         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 572
 573         show_chgstatus("chg/init",
 574                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 575         show_regstatus("reg/init",
 576                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 577
 578         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 579                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 580                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 581                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
 582         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 583                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 584                 i2c_smbus_read_byte_data(client, TPS_MASK3));
 585
 586         i2c_set_clientdata(client, tps);
 587         the_tps = tps;
 588
 589 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 590         /* USB hosts can't draw VBUS.  OTG devices could, later
 591          * when OTG infrastructure enables it.  USB peripherals
 592          * could be relying on VBUS while booting, though.
 593          */
 594         tps->vbus = 100;
 595 #endif
 596
 597         /* unmask the "interesting" irqs, then poll once to
 598          * kickstart monitoring, initialize shadowed status
 599          * registers, and maybe disable VBUS draw.
 600          */
 601         tps->nmask1 = ~0;
 602         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 603
 604         tps->nmask2 = TPS_REG_ONOFF;
 605         if (tps->model == TPS65013)
 606                 tps->nmask2 |= TPS_REG_NO_CHG;
 607         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 608
 609         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 610                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
 611
 612         tps65010_work(&tps->work.work);
 613
 614         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 615                                 tps, DEBUG_FOPS);
 616
 617         /* optionally register GPIOs */
 618         if (board) {
 619                 tps->outmask = board->outmask;
 620
 621                 tps->chip.label = client->name;
 622                 tps->chip.parent = &client->dev;
 623                 tps->chip.owner = THIS_MODULE;
 624
 625                 tps->chip.set = tps65010_gpio_set;
 626                 tps->chip.direction_output = tps65010_output;
 627
 628                 /* NOTE:  only partial support for inputs; nyet IRQs */
 629                 tps->chip.get = tps65010_gpio_get;
 630
 631                 tps->chip.base = -1;
 632                 tps->chip.ngpio = 7;
 633                 tps->chip.can_sleep = 1;
 634
 635                 status = gpiochip_add_data(&tps->chip, tps);
 636                 if (status < 0)
 637                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
 638                                         status);
 639                 else if (board->setup) {
 640                         status = board->setup(client, &tps->chip);
 641                         if (status < 0) {
 642                                 dev_dbg(&client->dev,
 643                                         "board %s %s err %d\n",
 644                                         "setup", client->name, status);
 645                                 status = 0;
 646                         }
 647                 }
 648         }
 649
 650         return 0;
 651 }
 652
 653 static const struct i2c_device_id tps65010_id[] = {
 654         { "tps65010", TPS65010 },
 655         { "tps65011", TPS65011 },
 656         { "tps65012", TPS65012 },
 657         { "tps65013", TPS65013 },
 658         { "tps65014", TPS65011 },       /* tps65011 charging at 6.5V max */
 659         { }
 660 };
 661 MODULE_DEVICE_TABLE(i2c, tps65010_id);
 662
 663 static struct i2c_driver tps65010_driver = {
 664         .driver = {
 665                 .name   = "tps65010",
 666         },
 667         .probe = tps65010_probe,
 668         .remove = tps65010_remove,
 669         .id_table = tps65010_id,
 670 };
 671
 672 /*-------------------------------------------------------------------------*/
 673
 674 /* Draw from VBUS:
 675  *   0 mA -- DON'T DRAW (might supply power instead)
 676  * 100 mA -- usb unit load (slowest charge rate)
 677  * 500 mA -- usb high power (fast battery charge)
 678  */
 679 int tps65010_set_vbus_draw(unsigned mA)
 680 {
 681         unsigned long   flags;
 682
 683         if (!the_tps)
 684                 return -ENODEV;
 685
 686         /* assumes non-SMP */
 687         local_irq_save(flags);
 688         if (mA >= 500)
 689                 mA = 500;
 690         else if (mA >= 100)
 691                 mA = 100;
 692         else
 693                 mA = 0;
 694         the_tps->vbus = mA;
 695         if ((the_tps->chgstatus & TPS_CHG_USB)
 696                         && test_and_set_bit(
 697                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 698                 /* gadget drivers call this in_irq() */
 699                 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
 700                                    0);
 701         }
 702         local_irq_restore(flags);
 703
 704         return 0;
 705 }
 706 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 707
 708 /*-------------------------------------------------------------------------*/
 709 /* tps65010_set_gpio_out_value parameter:
 710  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 711  * value: LOW or HIGH
 712  */
 713 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 714 {
 715         int      status;
 716         unsigned defgpio;
 717
 718         if (!the_tps)
 719                 return -ENODEV;
 720         if ((gpio < GPIO1) || (gpio > GPIO4))
 721                 return -EINVAL;
 722
 723         mutex_lock(&the_tps->lock);
 724
 725         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 726
 727         /* Configure GPIO for output */
 728         defgpio |= 1 << (gpio + 3);
 729
 730         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 731         switch (value) {
 732         case LOW:
 733                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 734                 break;
 735         /* case HIGH: */
 736         default:
 737                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 738                 break;
 739         }
 740
 741         status = i2c_smbus_write_byte_data(the_tps->client,
 742                 TPS_DEFGPIO, defgpio);
 743
 744         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 745                 gpio, value ? "high" : "low",
 746                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 747
 748         mutex_unlock(&the_tps->lock);
 749         return status;
 750 }
 751 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 752
 753 /*-------------------------------------------------------------------------*/
 754 /* tps65010_set_led parameter:
 755  * led:  LED1 or LED2
 756  * mode: ON, OFF or BLINK
 757  */
 758 int tps65010_set_led(unsigned led, unsigned mode)
 759 {
 760         int      status;
 761         unsigned led_on, led_per, offs;
 762
 763         if (!the_tps)
 764                 return -ENODEV;
 765
 766         if (led == LED1)
 767                 offs = 0;
 768         else {
 769                 offs = 2;
 770                 led = LED2;
 771         }
 772
 773         mutex_lock(&the_tps->lock);
 774
 775         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 776                 i2c_smbus_read_byte_data(the_tps->client,
 777                                 TPS_LED1_ON + offs));
 778
 779         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 780                 i2c_smbus_read_byte_data(the_tps->client,
 781                                 TPS_LED1_PER + offs));
 782
 783         switch (mode) {
 784         case OFF:
 785                 led_on  = 1 << 7;
 786                 led_per = 0 << 7;
 787                 break;
 788         case ON:
 789                 led_on  = 1 << 7;
 790                 led_per = 1 << 7;
 791                 break;
 792         case BLINK:
 793                 led_on  = 0x30 | (0 << 7);
 794                 led_per = 0x08 | (1 << 7);
 795                 break;
 796         default:
 797                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 798                        DRIVER_NAME);
 799                 mutex_unlock(&the_tps->lock);
 800                 return -EINVAL;
 801         }
 802
 803         status = i2c_smbus_write_byte_data(the_tps->client,
 804                         TPS_LED1_ON + offs, led_on);
 805
 806         if (status != 0) {
 807                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 808                        DRIVER_NAME, led);
 809                 mutex_unlock(&the_tps->lock);
 810                 return status;
 811         }
 812
 813         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 814                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 815
 816         status = i2c_smbus_write_byte_data(the_tps->client,
 817                         TPS_LED1_PER + offs, led_per);
 818
 819         if (status != 0) {
 820                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 821                        DRIVER_NAME, led);
 822                 mutex_unlock(&the_tps->lock);
 823                 return status;
 824         }
 825
 826         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 827                 i2c_smbus_read_byte_data(the_tps->client,
 828                                 TPS_LED1_PER + offs));
 829
 830         mutex_unlock(&the_tps->lock);
 831
 832         return status;
 833 }
 834 EXPORT_SYMBOL(tps65010_set_led);
 835
 836 /*-------------------------------------------------------------------------*/
 837 /* tps65010_set_vib parameter:
 838  * value: ON or OFF
 839  */
 840 int tps65010_set_vib(unsigned value)
 841 {
 842         int      status;
 843         unsigned vdcdc2;
 844
 845         if (!the_tps)
 846                 return -ENODEV;
 847
 848         mutex_lock(&the_tps->lock);
 849
 850         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 851         vdcdc2 &= ~(1 << 1);
 852         if (value)
 853                 vdcdc2 |= (1 << 1);
 854         status = i2c_smbus_write_byte_data(the_tps->client,
 855                 TPS_VDCDC2, vdcdc2);
 856
 857         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 858
 859         mutex_unlock(&the_tps->lock);
 860         return status;
 861 }
 862 EXPORT_SYMBOL(tps65010_set_vib);
 863
 864 /*-------------------------------------------------------------------------*/
 865 /* tps65010_set_low_pwr parameter:
 866  * mode: ON or OFF
 867  */
 868 int tps65010_set_low_pwr(unsigned mode)
 869 {
 870         int      status;
 871         unsigned vdcdc1;
 872
 873         if (!the_tps)
 874                 return -ENODEV;
 875
 876         mutex_lock(&the_tps->lock);
 877
 878         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 879                 mode ? "enable" : "disable",
 880                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 881
 882         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 883
 884         switch (mode) {
 885         case OFF:
 886                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 887                 break;
 888         /* case ON: */
 889         default:
 890                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 891                 break;
 892         }
 893
 894         status = i2c_smbus_write_byte_data(the_tps->client,
 895                         TPS_VDCDC1, vdcdc1);
 896
 897         if (status != 0)
 898                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 899                         DRIVER_NAME);
 900         else
 901                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 902                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 903
 904         mutex_unlock(&the_tps->lock);
 905
 906         return status;
 907 }
 908 EXPORT_SYMBOL(tps65010_set_low_pwr);
 909
 910 /*-------------------------------------------------------------------------*/
 911 /* tps65010_config_vregs1 parameter:
 912  * value to be written to VREGS1 register
 913  * Note: The complete register is written, set all bits you need
 914  */
 915 int tps65010_config_vregs1(unsigned value)
 916 {
 917         int      status;
 918
 919         if (!the_tps)
 920                 return -ENODEV;
 921
 922         mutex_lock(&the_tps->lock);
 923
 924         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 925                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 926
 927         status = i2c_smbus_write_byte_data(the_tps->client,
 928                         TPS_VREGS1, value);
 929
 930         if (status != 0)
 931                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 932                         DRIVER_NAME);
 933         else
 934                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 935                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 936
 937         mutex_unlock(&the_tps->lock);
 938
 939         return status;
 940 }
 941 EXPORT_SYMBOL(tps65010_config_vregs1);
 942
 943 int tps65010_config_vdcdc2(unsigned value)
 944 {
 945         struct i2c_client *c;
 946         int      status;
 947
 948         if (!the_tps)
 949                 return -ENODEV;
 950
 951         c = the_tps->client;
 952         mutex_lock(&the_tps->lock);
 953
 954         pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
 955                  i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 956
 957         status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
 958
 959         if (status != 0)
 960                 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
 961                         DRIVER_NAME);
 962         else
 963                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 964                          i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 965
 966         mutex_unlock(&the_tps->lock);
 967         return status;
 968 }
 969 EXPORT_SYMBOL(tps65010_config_vdcdc2);
 970
 971 /*-------------------------------------------------------------------------*/
 972 /* tps65013_set_low_pwr parameter:
 973  * mode: ON or OFF
 974  */
 975
 976 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 977         required if power supply is through a battery */
 978
 979 int tps65013_set_low_pwr(unsigned mode)
 980 {
 981         int      status;
 982         unsigned vdcdc1, chgconfig;
 983
 984         if (!the_tps || the_tps->por)
 985                 return -ENODEV;
 986
 987         mutex_lock(&the_tps->lock);
 988
 989         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 990                 DRIVER_NAME,
 991                 mode ? "enable" : "disable",
 992                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 993                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 994
 995         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
 996         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 997
 998         switch (mode) {
 999         case OFF:
1000                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1001                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1002                 break;
1003         /* case ON: */
1004         default:
1005                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1006                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1007                 break;
1008         }
1009
1010         status = i2c_smbus_write_byte_data(the_tps->client,
1011                         TPS_CHGCONFIG, chgconfig);
1012         if (status != 0) {
1013                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1014          DRIVER_NAME);
1015                 mutex_unlock(&the_tps->lock);
1016                 return status;
1017         }
1018
1019         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1020         the_tps->chgconf = chgconfig;
1021         show_chgconfig(0, "chgconf", chgconfig);
1022
1023         status = i2c_smbus_write_byte_data(the_tps->client,
1024                         TPS_VDCDC1, vdcdc1);
1025
1026         if (status != 0)
1027                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1028          DRIVER_NAME);
1029         else
1030                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1031                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1032
1033         mutex_unlock(&the_tps->lock);
1034
1035         return status;
1036 }
1037 EXPORT_SYMBOL(tps65013_set_low_pwr);
1038
1039 /*-------------------------------------------------------------------------*/
1040
1041 static int __init tps_init(void)
1042 {
1043         return i2c_add_driver(&tps65010_driver);
1044 }
1045 /* NOTE:  this MUST be initialized before the other parts of the system
1046  * that rely on it ... but after the i2c bus on which this relies.
1047  * That is, much earlier than on PC-type systems, which don't often use
1048  * I2C as a core system bus.
1049  */
1050 subsys_initcall(tps_init);
1051
1052 static void __exit tps_exit(void)
1053 {
1054         i2c_del_driver(&tps65010_driver);
1055 }
1056 module_exit(tps_exit);
1057