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