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