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tps65010.c
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linux-6.19.14/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/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 33MODULE_DESCRIPTION("TPS6501x Power Management Driver"); 34MODULE_LICENSE("GPL"); 35 36static 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 */ 54enum tps_model { 55 TPS65010, 56 TPS65011, 57 TPS65012, 58 TPS65013, 59}; 60 61struct 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 89static 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 105static 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 119static 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 149static 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 157static 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 165static 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 175static inline void show_chgstatus(const char *label, u8 chgstatus) { } 176static inline void show_regstatus(const char *label, u8 chgstatus) { } 177static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } 178 179#endif 180 181#ifdef CONFIG_DEBUG_FS 182 183static 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 287static int dbg_tps_open(struct inode *inode, struct file *file) 288{ 289 return single_open(file, dbg_show, inode->i_private); 290} 291 292static 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 */ 308static 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 */ 398static 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 433static 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 */ 449static int 450tps65010_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 return 0; 460} 461 462static int 463tps65010_output(struct gpio_chip *chip, unsigned offset, int value) 464{ 465 /* GPIOs may be input-only */ 466 if (offset < 4) { 467 struct tps65010 *tps; 468 469 tps = gpiochip_get_data(chip); 470 if (!(tps->outmask & (1 << offset))) 471 return -EINVAL; 472 tps65010_set_gpio_out_value(offset + 1, value); 473 } else if (offset < 6) 474 tps65010_set_led(offset - 3, value ? ON : OFF); 475 else 476 tps65010_set_vib(value); 477 478 return 0; 479} 480 481static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) 482{ 483 int value; 484 struct tps65010 *tps; 485 486 tps = gpiochip_get_data(chip); 487 488 if (offset < 4) { 489 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); 490 if (value < 0) 491 return value; 492 if (value & (1 << (offset + 4))) /* output */ 493 return !(value & (1 << offset)); 494 else /* input */ 495 return !!(value & (1 << offset)); 496 } 497 498 /* REVISIT we *could* report LED1/nPG and LED2 state ... */ 499 return 0; 500} 501 502 503/*-------------------------------------------------------------------------*/ 504 505static struct tps65010 *the_tps; 506 507static void tps65010_remove(struct i2c_client *client) 508{ 509 struct tps65010 *tps = i2c_get_clientdata(client); 510 struct tps65010_board *board = dev_get_platdata(&client->dev); 511 512 if (board && board->teardown) 513 board->teardown(client, &tps->chip); 514 if (client->irq > 0) 515 free_irq(client->irq, tps); 516 cancel_delayed_work_sync(&tps->work); 517 the_tps = NULL; 518} 519 520static int tps65010_probe(struct i2c_client *client) 521{ 522 const struct i2c_device_id *id = i2c_client_get_device_id(client); 523 struct tps65010 *tps; 524 int status; 525 struct tps65010_board *board = dev_get_platdata(&client->dev); 526 527 if (the_tps) { 528 dev_dbg(&client->dev, "only one tps6501x chip allowed\n"); 529 return -ENODEV; 530 } 531 532 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 533 return -EINVAL; 534 535 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); 536 if (!tps) 537 return -ENOMEM; 538 539 mutex_init(&tps->lock); 540 INIT_DELAYED_WORK(&tps->work, tps65010_work); 541 tps->client = client; 542 tps->model = id->driver_data; 543 544 /* the IRQ is active low, but many gpio lines can't support that 545 * so this driver uses falling-edge triggers instead. 546 */ 547 if (client->irq > 0) { 548 status = request_irq(client->irq, tps65010_irq, 549 IRQF_TRIGGER_FALLING | IRQF_NO_AUTOEN, 550 DRIVER_NAME, tps); 551 if (status < 0) { 552 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", 553 client->irq, status); 554 return status; 555 } 556 set_bit(FLAG_IRQ_ENABLE, &tps->flags); 557 } else 558 dev_warn(&client->dev, "IRQ not configured!\n"); 559 560 561 switch (tps->model) { 562 case TPS65010: 563 case TPS65012: 564 tps->por = 1; 565 break; 566 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ 567 } 568 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); 569 show_chgconfig(tps->por, "conf/init", tps->chgconf); 570 571 show_chgstatus("chg/init", 572 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); 573 show_regstatus("reg/init", 574 i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); 575 576 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, 577 i2c_smbus_read_byte_data(client, TPS_VDCDC1), 578 i2c_smbus_read_byte_data(client, TPS_VDCDC2), 579 i2c_smbus_read_byte_data(client, TPS_VREGS1)); 580 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, 581 i2c_smbus_read_byte_data(client, TPS_DEFGPIO), 582 i2c_smbus_read_byte_data(client, TPS_MASK3)); 583 584 i2c_set_clientdata(client, tps); 585 the_tps = tps; 586 587#if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) 588 /* USB hosts can't draw VBUS. OTG devices could, later 589 * when OTG infrastructure enables it. USB peripherals 590 * could be relying on VBUS while booting, though. 591 */ 592 tps->vbus = 100; 593#endif 594 595 /* unmask the "interesting" irqs, then poll once to 596 * kickstart monitoring, initialize shadowed status 597 * registers, and maybe disable VBUS draw. 598 */ 599 tps->nmask1 = ~0; 600 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1); 601 602 tps->nmask2 = TPS_REG_ONOFF; 603 if (tps->model == TPS65013) 604 tps->nmask2 |= TPS_REG_NO_CHG; 605 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2); 606 607 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f 608 | i2c_smbus_read_byte_data(client, TPS_MASK3)); 609 610 tps65010_work(&tps->work.work); 611 612 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, client->debugfs, 613 tps, DEBUG_FOPS); 614 615 /* optionally register GPIOs */ 616 if (board) { 617 tps->outmask = board->outmask; 618 619 tps->chip.label = client->name; 620 tps->chip.parent = &client->dev; 621 tps->chip.owner = THIS_MODULE; 622 623 tps->chip.set = tps65010_gpio_set; 624 tps->chip.direction_output = tps65010_output; 625 626 /* NOTE: only partial support for inputs; nyet IRQs */ 627 tps->chip.get = tps65010_gpio_get; 628 629 tps->chip.base = -1; 630 tps->chip.ngpio = 7; 631 tps->chip.can_sleep = 1; 632 633 status = gpiochip_add_data(&tps->chip, tps); 634 if (status < 0) 635 dev_err(&client->dev, "can't add gpiochip, err %d\n", 636 status); 637 else if (board->setup) { 638 status = board->setup(client, &tps->chip); 639 if (status < 0) { 640 dev_dbg(&client->dev, 641 "board %s %s err %d\n", 642 "setup", client->name, status); 643 status = 0; 644 } 645 } 646 } 647 648 return 0; 649} 650 651static const struct i2c_device_id tps65010_id[] = { 652 { "tps65010", TPS65010 }, 653 { "tps65011", TPS65011 }, 654 { "tps65012", TPS65012 }, 655 { "tps65013", TPS65013 }, 656 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */ 657 { } 658}; 659MODULE_DEVICE_TABLE(i2c, tps65010_id); 660 661static struct i2c_driver tps65010_driver = { 662 .driver = { 663 .name = "tps65010", 664 }, 665 .probe = tps65010_probe, 666 .remove = tps65010_remove, 667 .id_table = tps65010_id, 668}; 669 670/*-------------------------------------------------------------------------*/ 671 672/* Draw from VBUS: 673 * 0 mA -- DON'T DRAW (might supply power instead) 674 * 100 mA -- usb unit load (slowest charge rate) 675 * 500 mA -- usb high power (fast battery charge) 676 */ 677int tps65010_set_vbus_draw(unsigned mA) 678{ 679 unsigned long flags; 680 681 if (!the_tps) 682 return -ENODEV; 683 684 /* assumes non-SMP */ 685 local_irq_save(flags); 686 if (mA >= 500) 687 mA = 500; 688 else if (mA >= 100) 689 mA = 100; 690 else 691 mA = 0; 692 the_tps->vbus = mA; 693 if ((the_tps->chgstatus & TPS_CHG_USB) 694 && test_and_set_bit( 695 FLAG_VBUS_CHANGED, &the_tps->flags)) { 696 /* gadget drivers call this in_irq() */ 697 queue_delayed_work(system_power_efficient_wq, &the_tps->work, 698 0); 699 } 700 local_irq_restore(flags); 701 702 return 0; 703} 704EXPORT_SYMBOL(tps65010_set_vbus_draw); 705 706/*-------------------------------------------------------------------------*/ 707/* tps65010_set_gpio_out_value parameter: 708 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 709 * value: LOW or HIGH 710 */ 711int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) 712{ 713 int status; 714 unsigned defgpio; 715 716 if (!the_tps) 717 return -ENODEV; 718 if ((gpio < GPIO1) || (gpio > GPIO4)) 719 return -EINVAL; 720 721 mutex_lock(&the_tps->lock); 722 723 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO); 724 725 /* Configure GPIO for output */ 726 defgpio |= 1 << (gpio + 3); 727 728 /* Writing 1 forces a logic 0 on that GPIO and vice versa */ 729 switch (value) { 730 case LOW: 731 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ 732 break; 733 /* case HIGH: */ 734 default: 735 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ 736 break; 737 } 738 739 status = i2c_smbus_write_byte_data(the_tps->client, 740 TPS_DEFGPIO, defgpio); 741 742 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, 743 gpio, str_high_low(value), 744 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); 745 746 mutex_unlock(&the_tps->lock); 747 return status; 748} 749EXPORT_SYMBOL(tps65010_set_gpio_out_value); 750 751/*-------------------------------------------------------------------------*/ 752/* tps65010_set_led parameter: 753 * led: LED1 or LED2 754 * mode: ON, OFF or BLINK 755 */ 756int tps65010_set_led(unsigned led, unsigned mode) 757{ 758 int status; 759 unsigned led_on, led_per, offs; 760 761 if (!the_tps) 762 return -ENODEV; 763 764 if (led == LED1) 765 offs = 0; 766 else { 767 offs = 2; 768 led = LED2; 769 } 770 771 mutex_lock(&the_tps->lock); 772 773 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, 774 i2c_smbus_read_byte_data(the_tps->client, 775 TPS_LED1_ON + offs)); 776 777 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, 778 i2c_smbus_read_byte_data(the_tps->client, 779 TPS_LED1_PER + offs)); 780 781 switch (mode) { 782 case OFF: 783 led_on = 1 << 7; 784 led_per = 0 << 7; 785 break; 786 case ON: 787 led_on = 1 << 7; 788 led_per = 1 << 7; 789 break; 790 case BLINK: 791 led_on = 0x30 | (0 << 7); 792 led_per = 0x08 | (1 << 7); 793 break; 794 default: 795 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", 796 DRIVER_NAME); 797 mutex_unlock(&the_tps->lock); 798 return -EINVAL; 799 } 800 801 status = i2c_smbus_write_byte_data(the_tps->client, 802 TPS_LED1_ON + offs, led_on); 803 804 if (status != 0) { 805 printk(KERN_ERR "%s: Failed to write led%i_on register\n", 806 DRIVER_NAME, led); 807 mutex_unlock(&the_tps->lock); 808 return status; 809 } 810 811 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, 812 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); 813 814 status = i2c_smbus_write_byte_data(the_tps->client, 815 TPS_LED1_PER + offs, led_per); 816 817 if (status != 0) { 818 printk(KERN_ERR "%s: Failed to write led%i_per register\n", 819 DRIVER_NAME, led); 820 mutex_unlock(&the_tps->lock); 821 return status; 822 } 823 824 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, 825 i2c_smbus_read_byte_data(the_tps->client, 826 TPS_LED1_PER + offs)); 827 828 mutex_unlock(&the_tps->lock); 829 830 return status; 831} 832EXPORT_SYMBOL(tps65010_set_led); 833 834/*-------------------------------------------------------------------------*/ 835/* tps65010_set_vib parameter: 836 * value: ON or OFF 837 */ 838int tps65010_set_vib(unsigned value) 839{ 840 int status; 841 unsigned vdcdc2; 842 843 if (!the_tps) 844 return -ENODEV; 845 846 mutex_lock(&the_tps->lock); 847 848 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2); 849 vdcdc2 &= ~(1 << 1); 850 if (value) 851 vdcdc2 |= (1 << 1); 852 status = i2c_smbus_write_byte_data(the_tps->client, 853 TPS_VDCDC2, vdcdc2); 854 855 pr_debug("%s: vibrator %s\n", DRIVER_NAME, str_on_off(value)); 856 857 mutex_unlock(&the_tps->lock); 858 return status; 859} 860EXPORT_SYMBOL(tps65010_set_vib); 861 862/*-------------------------------------------------------------------------*/ 863/* tps65010_set_low_pwr parameter: 864 * mode: ON or OFF 865 */ 866int tps65010_set_low_pwr(unsigned mode) 867{ 868 int status; 869 unsigned vdcdc1; 870 871 if (!the_tps) 872 return -ENODEV; 873 874 mutex_lock(&the_tps->lock); 875 876 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, 877 str_enable_disable(mode), 878 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 879 880 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); 881 882 switch (mode) { 883 case OFF: 884 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ 885 break; 886 /* case ON: */ 887 default: 888 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ 889 break; 890 } 891 892 status = i2c_smbus_write_byte_data(the_tps->client, 893 TPS_VDCDC1, vdcdc1); 894 895 if (status != 0) 896 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", 897 DRIVER_NAME); 898 else 899 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, 900 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 901 902 mutex_unlock(&the_tps->lock); 903 904 return status; 905} 906EXPORT_SYMBOL(tps65010_set_low_pwr); 907 908/*-------------------------------------------------------------------------*/ 909/* tps65010_config_vregs1 parameter: 910 * value to be written to VREGS1 register 911 * Note: The complete register is written, set all bits you need 912 */ 913int tps65010_config_vregs1(unsigned value) 914{ 915 int status; 916 917 if (!the_tps) 918 return -ENODEV; 919 920 mutex_lock(&the_tps->lock); 921 922 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 923 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); 924 925 status = i2c_smbus_write_byte_data(the_tps->client, 926 TPS_VREGS1, value); 927 928 if (status != 0) 929 printk(KERN_ERR "%s: Failed to write vregs1 register\n", 930 DRIVER_NAME); 931 else 932 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 933 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); 934 935 mutex_unlock(&the_tps->lock); 936 937 return status; 938} 939EXPORT_SYMBOL(tps65010_config_vregs1); 940 941int tps65010_config_vdcdc2(unsigned value) 942{ 943 struct i2c_client *c; 944 int status; 945 946 if (!the_tps) 947 return -ENODEV; 948 949 c = the_tps->client; 950 mutex_lock(&the_tps->lock); 951 952 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME, 953 i2c_smbus_read_byte_data(c, TPS_VDCDC2)); 954 955 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value); 956 957 if (status != 0) 958 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n", 959 DRIVER_NAME); 960 else 961 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 962 i2c_smbus_read_byte_data(c, TPS_VDCDC2)); 963 964 mutex_unlock(&the_tps->lock); 965 return status; 966} 967EXPORT_SYMBOL(tps65010_config_vdcdc2); 968 969/*-------------------------------------------------------------------------*/ 970/* tps65013_set_low_pwr parameter: 971 * mode: ON or OFF 972 */ 973 974/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not 975 required if power supply is through a battery */ 976 977int tps65013_set_low_pwr(unsigned mode) 978{ 979 int status; 980 unsigned vdcdc1, chgconfig; 981 982 if (!the_tps || the_tps->por) 983 return -ENODEV; 984 985 mutex_lock(&the_tps->lock); 986 987 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", 988 DRIVER_NAME, 989 str_enable_disable(mode), 990 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), 991 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 992 993 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); 994 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); 995 996 switch (mode) { 997 case OFF: 998 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ 999 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ 1000 break; 1001 /* case ON: */ 1002 default: 1003 chgconfig |= TPS65013_AUA; /* enable AUA bit */ 1004 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ 1005 break; 1006 } 1007 1008 status = i2c_smbus_write_byte_data(the_tps->client, 1009 TPS_CHGCONFIG, chgconfig); 1010 if (status != 0) { 1011 printk(KERN_ERR "%s: Failed to write chconfig register\n", 1012 DRIVER_NAME); 1013 mutex_unlock(&the_tps->lock); 1014 return status; 1015 } 1016 1017 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); 1018 the_tps->chgconf = chgconfig; 1019 show_chgconfig(0, "chgconf", chgconfig); 1020 1021 status = i2c_smbus_write_byte_data(the_tps->client, 1022 TPS_VDCDC1, vdcdc1); 1023 1024 if (status != 0) 1025 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", 1026 DRIVER_NAME); 1027 else 1028 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, 1029 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 1030 1031 mutex_unlock(&the_tps->lock); 1032 1033 return status; 1034} 1035EXPORT_SYMBOL(tps65013_set_low_pwr); 1036 1037/*-------------------------------------------------------------------------*/ 1038 1039static int __init tps_init(void) 1040{ 1041 return i2c_add_driver(&tps65010_driver); 1042} 1043/* NOTE: this MUST be initialized before the other parts of the system 1044 * that rely on it ... but after the i2c bus on which this relies. 1045 * That is, much earlier than on PC-type systems, which don't often use 1046 * I2C as a core system bus. 1047 */ 1048subsys_initcall(tps_init); 1049 1050static void __exit tps_exit(void) 1051{ 1052 i2c_del_driver(&tps65010_driver); 1053} 1054module_exit(tps_exit); 1055
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