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 int 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                 int status = board->teardown(client, board->context);
 511                 if (status < 0)
 512                         dev_dbg(&client->dev, "board %s %s err %d\n",
 513                                 "teardown", client->name, status);
 514         }
 515         if (client->irq > 0)
 516                 free_irq(client->irq, tps);
 517         cancel_delayed_work_sync(&tps->work);
 518         debugfs_remove(tps->file);
 519         the_tps = NULL;
 520         return 0;
 521 }
 522
 523 static int tps65010_probe(struct i2c_client *client,
 524                           const struct i2c_device_id *id)
 525 {
 526         struct tps65010         *tps;
 527         int                     status;
 528         struct tps65010_board   *board = dev_get_platdata(&client->dev);
 529
 530         if (the_tps) {
 531                 dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
 532                 return -ENODEV;
 533         }
 534
 535         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 536                 return -EINVAL;
 537
 538         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 539         if (!tps)
 540                 return -ENOMEM;
 541
 542         mutex_init(&tps->lock);
 543         INIT_DELAYED_WORK(&tps->work, tps65010_work);
 544         tps->client = client;
 545         tps->model = id->driver_data;
 546
 547         /* the IRQ is active low, but many gpio lines can't support that
 548          * so this driver uses falling-edge triggers instead.
 549          */
 550         if (client->irq > 0) {
 551                 status = request_irq(client->irq, tps65010_irq,
 552                                      IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
 553                 if (status < 0) {
 554                         dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
 555                                         client->irq, status);
 556                         return status;
 557                 }
 558                 /* annoying race here, ideally we'd have an option
 559                  * to claim the irq now and enable it later.
 560                  * FIXME genirq IRQF_NOAUTOEN now solves that ...
 561                  */
 562                 disable_irq(client->irq);
 563                 set_bit(FLAG_IRQ_ENABLE, &tps->flags);
 564         } else
 565                 dev_warn(&client->dev, "IRQ not configured!\n");
 566
 567
 568         switch (tps->model) {
 569         case TPS65010:
 570         case TPS65012:
 571                 tps->por = 1;
 572                 break;
 573         /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
 574         }
 575         tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
 576         show_chgconfig(tps->por, "conf/init", tps->chgconf);
 577
 578         show_chgstatus("chg/init",
 579                 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
 580         show_regstatus("reg/init",
 581                 i2c_smbus_read_byte_data(client, TPS_REGSTATUS));
 582
 583         pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
 584                 i2c_smbus_read_byte_data(client, TPS_VDCDC1),
 585                 i2c_smbus_read_byte_data(client, TPS_VDCDC2),
 586                 i2c_smbus_read_byte_data(client, TPS_VREGS1));
 587         pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
 588                 i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
 589                 i2c_smbus_read_byte_data(client, TPS_MASK3));
 590
 591         i2c_set_clientdata(client, tps);
 592         the_tps = tps;
 593
 594 #if     defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
 595         /* USB hosts can't draw VBUS.  OTG devices could, later
 596          * when OTG infrastructure enables it.  USB peripherals
 597          * could be relying on VBUS while booting, though.
 598          */
 599         tps->vbus = 100;
 600 #endif
 601
 602         /* unmask the "interesting" irqs, then poll once to
 603          * kickstart monitoring, initialize shadowed status
 604          * registers, and maybe disable VBUS draw.
 605          */
 606         tps->nmask1 = ~0;
 607         (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);
 608
 609         tps->nmask2 = TPS_REG_ONOFF;
 610         if (tps->model == TPS65013)
 611                 tps->nmask2 |= TPS_REG_NO_CHG;
 612         (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);
 613
 614         (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
 615                 | i2c_smbus_read_byte_data(client, TPS_MASK3));
 616
 617         tps65010_work(&tps->work.work);
 618
 619         tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
 620                                 tps, DEBUG_FOPS);
 621
 622         /* optionally register GPIOs */
 623         if (board && board->base != 0) {
 624                 tps->outmask = board->outmask;
 625
 626                 tps->chip.label = client->name;
 627                 tps->chip.parent = &client->dev;
 628                 tps->chip.owner = THIS_MODULE;
 629
 630                 tps->chip.set = tps65010_gpio_set;
 631                 tps->chip.direction_output = tps65010_output;
 632
 633                 /* NOTE:  only partial support for inputs; nyet IRQs */
 634                 tps->chip.get = tps65010_gpio_get;
 635
 636                 tps->chip.base = board->base;
 637                 tps->chip.ngpio = 7;
 638                 tps->chip.can_sleep = 1;
 639
 640                 status = gpiochip_add_data(&tps->chip, tps);
 641                 if (status < 0)
 642                         dev_err(&client->dev, "can't add gpiochip, err %d\n",
 643                                         status);
 644                 else if (board->setup) {
 645                         status = board->setup(client, board->context);
 646                         if (status < 0) {
 647                                 dev_dbg(&client->dev,
 648                                         "board %s %s err %d\n",
 649                                         "setup", client->name, status);
 650                                 status = 0;
 651                         }
 652                 }
 653         }
 654
 655         return 0;
 656 }
 657
 658 static const struct i2c_device_id tps65010_id[] = {
 659         { "tps65010", TPS65010 },
 660         { "tps65011", TPS65011 },
 661         { "tps65012", TPS65012 },
 662         { "tps65013", TPS65013 },
 663         { "tps65014", TPS65011 },       /* tps65011 charging at 6.5V max */
 664         { }
 665 };
 666 MODULE_DEVICE_TABLE(i2c, tps65010_id);
 667
 668 static struct i2c_driver tps65010_driver = {
 669         .driver = {
 670                 .name   = "tps65010",
 671         },
 672         .probe  = tps65010_probe,
 673         .remove = tps65010_remove,
 674         .id_table = tps65010_id,
 675 };
 676
 677 /*-------------------------------------------------------------------------*/
 678
 679 /* Draw from VBUS:
 680  *   0 mA -- DON'T DRAW (might supply power instead)
 681  * 100 mA -- usb unit load (slowest charge rate)
 682  * 500 mA -- usb high power (fast battery charge)
 683  */
 684 int tps65010_set_vbus_draw(unsigned mA)
 685 {
 686         unsigned long   flags;
 687
 688         if (!the_tps)
 689                 return -ENODEV;
 690
 691         /* assumes non-SMP */
 692         local_irq_save(flags);
 693         if (mA >= 500)
 694                 mA = 500;
 695         else if (mA >= 100)
 696                 mA = 100;
 697         else
 698                 mA = 0;
 699         the_tps->vbus = mA;
 700         if ((the_tps->chgstatus & TPS_CHG_USB)
 701                         && test_and_set_bit(
 702                                 FLAG_VBUS_CHANGED, &the_tps->flags)) {
 703                 /* gadget drivers call this in_irq() */
 704                 queue_delayed_work(system_power_efficient_wq, &the_tps->work,
 705                                    0);
 706         }
 707         local_irq_restore(flags);
 708
 709         return 0;
 710 }
 711 EXPORT_SYMBOL(tps65010_set_vbus_draw);
 712
 713 /*-------------------------------------------------------------------------*/
 714 /* tps65010_set_gpio_out_value parameter:
 715  * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 716  * value: LOW or HIGH
 717  */
 718 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
 719 {
 720         int      status;
 721         unsigned defgpio;
 722
 723         if (!the_tps)
 724                 return -ENODEV;
 725         if ((gpio < GPIO1) || (gpio > GPIO4))
 726                 return -EINVAL;
 727
 728         mutex_lock(&the_tps->lock);
 729
 730         defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);
 731
 732         /* Configure GPIO for output */
 733         defgpio |= 1 << (gpio + 3);
 734
 735         /* Writing 1 forces a logic 0 on that GPIO and vice versa */
 736         switch (value) {
 737         case LOW:
 738                 defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
 739                 break;
 740         /* case HIGH: */
 741         default:
 742                 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
 743                 break;
 744         }
 745
 746         status = i2c_smbus_write_byte_data(the_tps->client,
 747                 TPS_DEFGPIO, defgpio);
 748
 749         pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
 750                 gpio, value ? "high" : "low",
 751                 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));
 752
 753         mutex_unlock(&the_tps->lock);
 754         return status;
 755 }
 756 EXPORT_SYMBOL(tps65010_set_gpio_out_value);
 757
 758 /*-------------------------------------------------------------------------*/
 759 /* tps65010_set_led parameter:
 760  * led:  LED1 or LED2
 761  * mode: ON, OFF or BLINK
 762  */
 763 int tps65010_set_led(unsigned led, unsigned mode)
 764 {
 765         int      status;
 766         unsigned led_on, led_per, offs;
 767
 768         if (!the_tps)
 769                 return -ENODEV;
 770
 771         if (led == LED1)
 772                 offs = 0;
 773         else {
 774                 offs = 2;
 775                 led = LED2;
 776         }
 777
 778         mutex_lock(&the_tps->lock);
 779
 780         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 781                 i2c_smbus_read_byte_data(the_tps->client,
 782                                 TPS_LED1_ON + offs));
 783
 784         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 785                 i2c_smbus_read_byte_data(the_tps->client,
 786                                 TPS_LED1_PER + offs));
 787
 788         switch (mode) {
 789         case OFF:
 790                 led_on  = 1 << 7;
 791                 led_per = 0 << 7;
 792                 break;
 793         case ON:
 794                 led_on  = 1 << 7;
 795                 led_per = 1 << 7;
 796                 break;
 797         case BLINK:
 798                 led_on  = 0x30 | (0 << 7);
 799                 led_per = 0x08 | (1 << 7);
 800                 break;
 801         default:
 802                 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
 803                        DRIVER_NAME);
 804                 mutex_unlock(&the_tps->lock);
 805                 return -EINVAL;
 806         }
 807
 808         status = i2c_smbus_write_byte_data(the_tps->client,
 809                         TPS_LED1_ON + offs, led_on);
 810
 811         if (status != 0) {
 812                 printk(KERN_ERR "%s: Failed to write led%i_on register\n",
 813                        DRIVER_NAME, led);
 814                 mutex_unlock(&the_tps->lock);
 815                 return status;
 816         }
 817
 818         pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
 819                 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));
 820
 821         status = i2c_smbus_write_byte_data(the_tps->client,
 822                         TPS_LED1_PER + offs, led_per);
 823
 824         if (status != 0) {
 825                 printk(KERN_ERR "%s: Failed to write led%i_per register\n",
 826                        DRIVER_NAME, led);
 827                 mutex_unlock(&the_tps->lock);
 828                 return status;
 829         }
 830
 831         pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
 832                 i2c_smbus_read_byte_data(the_tps->client,
 833                                 TPS_LED1_PER + offs));
 834
 835         mutex_unlock(&the_tps->lock);
 836
 837         return status;
 838 }
 839 EXPORT_SYMBOL(tps65010_set_led);
 840
 841 /*-------------------------------------------------------------------------*/
 842 /* tps65010_set_vib parameter:
 843  * value: ON or OFF
 844  */
 845 int tps65010_set_vib(unsigned value)
 846 {
 847         int      status;
 848         unsigned vdcdc2;
 849
 850         if (!the_tps)
 851                 return -ENODEV;
 852
 853         mutex_lock(&the_tps->lock);
 854
 855         vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
 856         vdcdc2 &= ~(1 << 1);
 857         if (value)
 858                 vdcdc2 |= (1 << 1);
 859         status = i2c_smbus_write_byte_data(the_tps->client,
 860                 TPS_VDCDC2, vdcdc2);
 861
 862         pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");
 863
 864         mutex_unlock(&the_tps->lock);
 865         return status;
 866 }
 867 EXPORT_SYMBOL(tps65010_set_vib);
 868
 869 /*-------------------------------------------------------------------------*/
 870 /* tps65010_set_low_pwr parameter:
 871  * mode: ON or OFF
 872  */
 873 int tps65010_set_low_pwr(unsigned mode)
 874 {
 875         int      status;
 876         unsigned vdcdc1;
 877
 878         if (!the_tps)
 879                 return -ENODEV;
 880
 881         mutex_lock(&the_tps->lock);
 882
 883         pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
 884                 mode ? "enable" : "disable",
 885                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 886
 887         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
 888
 889         switch (mode) {
 890         case OFF:
 891                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
 892                 break;
 893         /* case ON: */
 894         default:
 895                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
 896                 break;
 897         }
 898
 899         status = i2c_smbus_write_byte_data(the_tps->client,
 900                         TPS_VDCDC1, vdcdc1);
 901
 902         if (status != 0)
 903                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
 904                         DRIVER_NAME);
 905         else
 906                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
 907                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 908
 909         mutex_unlock(&the_tps->lock);
 910
 911         return status;
 912 }
 913 EXPORT_SYMBOL(tps65010_set_low_pwr);
 914
 915 /*-------------------------------------------------------------------------*/
 916 /* tps65010_config_vregs1 parameter:
 917  * value to be written to VREGS1 register
 918  * Note: The complete register is written, set all bits you need
 919  */
 920 int tps65010_config_vregs1(unsigned value)
 921 {
 922         int      status;
 923
 924         if (!the_tps)
 925                 return -ENODEV;
 926
 927         mutex_lock(&the_tps->lock);
 928
 929         pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 930                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 931
 932         status = i2c_smbus_write_byte_data(the_tps->client,
 933                         TPS_VREGS1, value);
 934
 935         if (status != 0)
 936                 printk(KERN_ERR "%s: Failed to write vregs1 register\n",
 937                         DRIVER_NAME);
 938         else
 939                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 940                         i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));
 941
 942         mutex_unlock(&the_tps->lock);
 943
 944         return status;
 945 }
 946 EXPORT_SYMBOL(tps65010_config_vregs1);
 947
 948 int tps65010_config_vdcdc2(unsigned value)
 949 {
 950         struct i2c_client *c;
 951         int      status;
 952
 953         if (!the_tps)
 954                 return -ENODEV;
 955
 956         c = the_tps->client;
 957         mutex_lock(&the_tps->lock);
 958
 959         pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
 960                  i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 961
 962         status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);
 963
 964         if (status != 0)
 965                 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
 966                         DRIVER_NAME);
 967         else
 968                 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
 969                          i2c_smbus_read_byte_data(c, TPS_VDCDC2));
 970
 971         mutex_unlock(&the_tps->lock);
 972         return status;
 973 }
 974 EXPORT_SYMBOL(tps65010_config_vdcdc2);
 975
 976 /*-------------------------------------------------------------------------*/
 977 /* tps65013_set_low_pwr parameter:
 978  * mode: ON or OFF
 979  */
 980
 981 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
 982         required if power supply is through a battery */
 983
 984 int tps65013_set_low_pwr(unsigned mode)
 985 {
 986         int      status;
 987         unsigned vdcdc1, chgconfig;
 988
 989         if (!the_tps || the_tps->por)
 990                 return -ENODEV;
 991
 992         mutex_lock(&the_tps->lock);
 993
 994         pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
 995                 DRIVER_NAME,
 996                 mode ? "enable" : "disable",
 997                 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
 998                 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
 999
1000         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1001         vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);
1002
1003         switch (mode) {
1004         case OFF:
1005                 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
1006                 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
1007                 break;
1008         /* case ON: */
1009         default:
1010                 chgconfig |= TPS65013_AUA;  /* enable AUA bit */
1011                 vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
1012                 break;
1013         }
1014
1015         status = i2c_smbus_write_byte_data(the_tps->client,
1016                         TPS_CHGCONFIG, chgconfig);
1017         if (status != 0) {
1018                 printk(KERN_ERR "%s: Failed to write chconfig register\n",
1019          DRIVER_NAME);
1020                 mutex_unlock(&the_tps->lock);
1021                 return status;
1022         }
1023
1024         chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
1025         the_tps->chgconf = chgconfig;
1026         show_chgconfig(0, "chgconf", chgconfig);
1027
1028         status = i2c_smbus_write_byte_data(the_tps->client,
1029                         TPS_VDCDC1, vdcdc1);
1030
1031         if (status != 0)
1032                 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
1033          DRIVER_NAME);
1034         else
1035                 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
1036                         i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));
1037
1038         mutex_unlock(&the_tps->lock);
1039
1040         return status;
1041 }
1042 EXPORT_SYMBOL(tps65013_set_low_pwr);
1043
1044 /*-------------------------------------------------------------------------*/
1045
1046 static int __init tps_init(void)
1047 {
1048         return i2c_add_driver(&tps65010_driver);
1049 }
1050 /* NOTE:  this MUST be initialized before the other parts of the system
1051  * that rely on it ... but after the i2c bus on which this relies.
1052  * That is, much earlier than on PC-type systems, which don't often use
1053  * I2C as a core system bus.
1054  */
1055 subsys_initcall(tps_init);
1056
1057 static void __exit tps_exit(void)
1058 {
1059         i2c_del_driver(&tps65010_driver);
1060 }
1061 module_exit(tps_exit);
1062