1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * AXP20x PMIC USB power supply status driver 4 * 5 * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com> 6 * Copyright (C) 2014 Bruno Pr��mont <bonbons@linux-vserver.org> 7 */ 8 9#include <linux/bitops.h> 10#include <linux/device.h> 11#include <linux/devm-helpers.h> 12#include <linux/init.h> 13#include <linux/interrupt.h> 14#include <linux/kernel.h> 15#include <linux/mfd/axp20x.h> 16#include <linux/module.h> 17#include <linux/of.h> 18#include <linux/platform_device.h> 19#include <linux/pm.h> 20#include <linux/power_supply.h> 21#include <linux/regmap.h> 22#include <linux/slab.h> 23#include <linux/iio/consumer.h> 24#include <linux/workqueue.h> 25 26#define DRVNAME "axp20x-usb-power-supply" 27 28#define AXP192_USB_OTG_STATUS 0x04 29 30#define AXP20X_PWR_STATUS_VBUS_PRESENT BIT(5) 31#define AXP20X_PWR_STATUS_VBUS_USED BIT(4) 32 33#define AXP20X_USB_STATUS_VBUS_VALID BIT(2) 34 35#define AXP20X_VBUS_VHOLD_uV(b) (4000000 + (((b) >> 3) & 7) * 100000) 36#define AXP20X_VBUS_VHOLD_MASK GENMASK(5, 3) 37#define AXP20X_VBUS_VHOLD_OFFSET 3 38 39#define AXP20X_ADC_EN1_VBUS_CURR BIT(2) 40#define AXP20X_ADC_EN1_VBUS_VOLT BIT(3) 41 42/* 43 * Note do not raise the debounce time, we must report Vusb high within 44 * 100ms otherwise we get Vbus errors in musb. 45 */ 46#define DEBOUNCE_TIME msecs_to_jiffies(50) 47 48struct axp_data { 49 const struct power_supply_desc *power_desc; 50 const char * const *irq_names; 51 unsigned int num_irq_names; 52 const int *curr_lim_table; 53 int curr_lim_table_size; 54 struct reg_field curr_lim_fld; 55 struct reg_field vbus_valid_bit; 56 struct reg_field vbus_mon_bit; 57 struct reg_field usb_bc_en_bit; 58 struct reg_field usb_bc_det_fld; 59 struct reg_field vbus_disable_bit; 60 bool vbus_needs_polling: 1; 61}; 62 63struct axp20x_usb_power { 64 struct device *dev; 65 struct regmap *regmap; 66 struct regmap_field *curr_lim_fld; 67 struct regmap_field *vbus_valid_bit; 68 struct regmap_field *vbus_mon_bit; 69 struct regmap_field *usb_bc_en_bit; 70 struct regmap_field *usb_bc_det_fld; 71 struct regmap_field *vbus_disable_bit; 72 struct power_supply *supply; 73 const struct axp_data *axp_data; 74 struct iio_channel *vbus_v; 75 struct iio_channel *vbus_i; 76 struct delayed_work vbus_detect; 77 unsigned int old_status; 78 unsigned int online; 79 unsigned int num_irqs; 80 unsigned int irqs[] __counted_by(num_irqs); 81}; 82 83static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power) 84{ 85 /* 86 * Polling is only necessary while VBUS is offline. While online, a 87 * present->absent transition implies an online->offline transition 88 * and will trigger the VBUS_REMOVAL IRQ. 89 */ 90 if (power->axp_data->vbus_needs_polling && !power->online) 91 return true; 92 93 return false; 94} 95 96static irqreturn_t axp20x_usb_power_irq(int irq, void *devid) 97{ 98 struct axp20x_usb_power *power = devid; 99 100 power_supply_changed(power->supply); 101 102 mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME); 103 104 return IRQ_HANDLED; 105} 106 107static void axp20x_usb_power_poll_vbus(struct work_struct *work) 108{ 109 struct axp20x_usb_power *power = 110 container_of(work, struct axp20x_usb_power, vbus_detect.work); 111 unsigned int val; 112 int ret; 113 114 ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &val); 115 if (ret) 116 goto out; 117 118 val &= (AXP20X_PWR_STATUS_VBUS_PRESENT | AXP20X_PWR_STATUS_VBUS_USED); 119 if (val != power->old_status) 120 power_supply_changed(power->supply); 121 122 if (power->usb_bc_en_bit && (val & AXP20X_PWR_STATUS_VBUS_PRESENT) != 123 (power->old_status & AXP20X_PWR_STATUS_VBUS_PRESENT)) { 124 dev_dbg(power->dev, "Cable status changed, re-enabling USB BC"); 125 ret = regmap_field_write(power->usb_bc_en_bit, 1); 126 if (ret) 127 dev_err(power->dev, "failed to enable USB BC: errno %d", 128 ret); 129 } 130 131 power->old_status = val; 132 power->online = val & AXP20X_PWR_STATUS_VBUS_USED; 133 134out: 135 if (axp20x_usb_vbus_needs_polling(power)) 136 mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME); 137} 138 139static int axp20x_get_usb_type(struct axp20x_usb_power *power, 140 union power_supply_propval *val) 141{ 142 unsigned int reg; 143 int ret; 144 145 if (!power->usb_bc_det_fld) 146 return -EINVAL; 147 148 ret = regmap_field_read(power->usb_bc_det_fld, ®); 149 if (ret) 150 return ret; 151 152 switch (reg) { 153 case 1: 154 val->intval = POWER_SUPPLY_USB_TYPE_SDP; 155 break; 156 case 2: 157 val->intval = POWER_SUPPLY_USB_TYPE_CDP; 158 break; 159 case 3: 160 val->intval = POWER_SUPPLY_USB_TYPE_DCP; 161 break; 162 default: 163 val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN; 164 break; 165 } 166 167 return 0; 168} 169 170static int axp20x_usb_power_get_property(struct power_supply *psy, 171 enum power_supply_property psp, union power_supply_propval *val) 172{ 173 struct axp20x_usb_power *power = power_supply_get_drvdata(psy); 174 unsigned int input, v; 175 int ret; 176 177 switch (psp) { 178 case POWER_SUPPLY_PROP_VOLTAGE_MIN: 179 ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v); 180 if (ret) 181 return ret; 182 183 val->intval = AXP20X_VBUS_VHOLD_uV(v); 184 return 0; 185 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 186 if (IS_ENABLED(CONFIG_AXP20X_ADC)) { 187 ret = iio_read_channel_processed(power->vbus_v, 188 &val->intval); 189 if (ret) 190 return ret; 191 192 /* 193 * IIO framework gives mV but Power Supply framework 194 * gives uV. 195 */ 196 val->intval *= 1000; 197 return 0; 198 } 199 200 ret = axp20x_read_variable_width(power->regmap, 201 AXP20X_VBUS_V_ADC_H, 12); 202 if (ret < 0) 203 return ret; 204 205 val->intval = ret * 1700; /* 1 step = 1.7 mV */ 206 return 0; 207 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 208 ret = regmap_field_read(power->curr_lim_fld, &v); 209 if (ret) 210 return ret; 211 212 if (v < power->axp_data->curr_lim_table_size) 213 val->intval = power->axp_data->curr_lim_table[v]; 214 else 215 val->intval = power->axp_data->curr_lim_table[ 216 power->axp_data->curr_lim_table_size - 1]; 217 return 0; 218 case POWER_SUPPLY_PROP_CURRENT_NOW: 219 if (IS_ENABLED(CONFIG_AXP20X_ADC)) { 220 ret = iio_read_channel_processed(power->vbus_i, 221 &val->intval); 222 if (ret) 223 return ret; 224 225 /* 226 * IIO framework gives mA but Power Supply framework 227 * gives uA. 228 */ 229 val->intval *= 1000; 230 return 0; 231 } 232 233 ret = axp20x_read_variable_width(power->regmap, 234 AXP20X_VBUS_I_ADC_H, 12); 235 if (ret < 0) 236 return ret; 237 238 val->intval = ret * 375; /* 1 step = 0.375 mA */ 239 return 0; 240 241 case POWER_SUPPLY_PROP_USB_TYPE: 242 return axp20x_get_usb_type(power, val); 243 default: 244 break; 245 } 246 247 /* All the properties below need the input-status reg value */ 248 ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &input); 249 if (ret) 250 return ret; 251 252 switch (psp) { 253 case POWER_SUPPLY_PROP_HEALTH: 254 if (!(input & AXP20X_PWR_STATUS_VBUS_PRESENT)) { 255 val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; 256 break; 257 } 258 259 val->intval = POWER_SUPPLY_HEALTH_GOOD; 260 261 if (power->vbus_valid_bit) { 262 ret = regmap_field_read(power->vbus_valid_bit, &v); 263 if (ret) 264 return ret; 265 266 if (v == 0) 267 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; 268 } 269 270 break; 271 case POWER_SUPPLY_PROP_PRESENT: 272 val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_PRESENT); 273 break; 274 case POWER_SUPPLY_PROP_ONLINE: 275 val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_USED); 276 break; 277 default: 278 return -EINVAL; 279 } 280 281 return 0; 282} 283 284static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power, 285 int intval) 286{ 287 int val; 288 289 switch (intval) { 290 case 4000000: 291 case 4100000: 292 case 4200000: 293 case 4300000: 294 case 4400000: 295 case 4500000: 296 case 4600000: 297 case 4700000: 298 val = (intval - 4000000) / 100000; 299 return regmap_update_bits(power->regmap, 300 AXP20X_VBUS_IPSOUT_MGMT, 301 AXP20X_VBUS_VHOLD_MASK, 302 val << AXP20X_VBUS_VHOLD_OFFSET); 303 default: 304 return -EINVAL; 305 } 306 307 return -EINVAL; 308} 309 310static int axp20x_usb_power_set_input_current_limit(struct axp20x_usb_power *power, 311 int intval) 312{ 313 int ret; 314 unsigned int reg; 315 const unsigned int max = power->axp_data->curr_lim_table_size; 316 317 if (intval == -1) 318 return -EINVAL; 319 320 /* 321 * BC1.2 detection can cause a race condition if we try to set a current 322 * limit while it's in progress. When it finishes it will overwrite the 323 * current limit we just set. 324 */ 325 if (power->usb_bc_en_bit) { 326 dev_dbg(power->dev, 327 "disabling BC1.2 detection because current limit was set"); 328 ret = regmap_field_write(power->usb_bc_en_bit, 0); 329 if (ret) 330 return ret; 331 } 332 333 for (reg = max - 1; reg > 0; reg--) 334 if (power->axp_data->curr_lim_table[reg] <= intval) 335 break; 336 337 dev_dbg(power->dev, "setting input current limit reg to %d (%d uA), requested %d uA", 338 reg, power->axp_data->curr_lim_table[reg], intval); 339 340 return regmap_field_write(power->curr_lim_fld, reg); 341} 342 343static int axp20x_usb_power_set_property(struct power_supply *psy, 344 enum power_supply_property psp, 345 const union power_supply_propval *val) 346{ 347 struct axp20x_usb_power *power = power_supply_get_drvdata(psy); 348 349 switch (psp) { 350 case POWER_SUPPLY_PROP_ONLINE: 351 if (!power->vbus_disable_bit) 352 return -EINVAL; 353 354 return regmap_field_write(power->vbus_disable_bit, !val->intval); 355 356 case POWER_SUPPLY_PROP_VOLTAGE_MIN: 357 return axp20x_usb_power_set_voltage_min(power, val->intval); 358 359 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 360 return axp20x_usb_power_set_input_current_limit(power, val->intval); 361 362 default: 363 return -EINVAL; 364 } 365 366 return -EINVAL; 367} 368 369static int axp20x_usb_power_prop_writeable(struct power_supply *psy, 370 enum power_supply_property psp) 371{ 372 struct axp20x_usb_power *power = power_supply_get_drvdata(psy); 373 374 /* 375 * The VBUS path select flag works differently on AXP288 and newer: 376 * - On AXP20x and AXP22x, the flag enables VBUS (ignoring N_VBUSEN). 377 * - On AXP288 and AXP8xx, the flag disables VBUS (ignoring N_VBUSEN). 378 * We only expose the control on variants where it can be used to force 379 * the VBUS input offline. 380 */ 381 if (psp == POWER_SUPPLY_PROP_ONLINE) 382 return power->vbus_disable_bit != NULL; 383 384 return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN || 385 psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT; 386} 387 388static enum power_supply_property axp20x_usb_power_properties[] = { 389 POWER_SUPPLY_PROP_HEALTH, 390 POWER_SUPPLY_PROP_PRESENT, 391 POWER_SUPPLY_PROP_ONLINE, 392 POWER_SUPPLY_PROP_VOLTAGE_MIN, 393 POWER_SUPPLY_PROP_VOLTAGE_NOW, 394 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 395 POWER_SUPPLY_PROP_CURRENT_NOW, 396}; 397 398static enum power_supply_property axp22x_usb_power_properties[] = { 399 POWER_SUPPLY_PROP_HEALTH, 400 POWER_SUPPLY_PROP_PRESENT, 401 POWER_SUPPLY_PROP_ONLINE, 402 POWER_SUPPLY_PROP_VOLTAGE_MIN, 403 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 404}; 405 406static enum power_supply_property axp813_usb_power_properties[] = { 407 POWER_SUPPLY_PROP_HEALTH, 408 POWER_SUPPLY_PROP_PRESENT, 409 POWER_SUPPLY_PROP_ONLINE, 410 POWER_SUPPLY_PROP_VOLTAGE_MIN, 411 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 412 POWER_SUPPLY_PROP_USB_TYPE, 413}; 414 415static enum power_supply_usb_type axp813_usb_types[] = { 416 POWER_SUPPLY_USB_TYPE_SDP, 417 POWER_SUPPLY_USB_TYPE_DCP, 418 POWER_SUPPLY_USB_TYPE_CDP, 419 POWER_SUPPLY_USB_TYPE_UNKNOWN, 420}; 421 422static const struct power_supply_desc axp20x_usb_power_desc = { 423 .name = "axp20x-usb", 424 .type = POWER_SUPPLY_TYPE_USB, 425 .properties = axp20x_usb_power_properties, 426 .num_properties = ARRAY_SIZE(axp20x_usb_power_properties), 427 .property_is_writeable = axp20x_usb_power_prop_writeable, 428 .get_property = axp20x_usb_power_get_property, 429 .set_property = axp20x_usb_power_set_property, 430}; 431 432static const struct power_supply_desc axp22x_usb_power_desc = { 433 .name = "axp20x-usb", 434 .type = POWER_SUPPLY_TYPE_USB, 435 .properties = axp22x_usb_power_properties, 436 .num_properties = ARRAY_SIZE(axp22x_usb_power_properties), 437 .property_is_writeable = axp20x_usb_power_prop_writeable, 438 .get_property = axp20x_usb_power_get_property, 439 .set_property = axp20x_usb_power_set_property, 440}; 441 442static const struct power_supply_desc axp813_usb_power_desc = { 443 .name = "axp20x-usb", 444 .type = POWER_SUPPLY_TYPE_USB, 445 .properties = axp813_usb_power_properties, 446 .num_properties = ARRAY_SIZE(axp813_usb_power_properties), 447 .property_is_writeable = axp20x_usb_power_prop_writeable, 448 .get_property = axp20x_usb_power_get_property, 449 .set_property = axp20x_usb_power_set_property, 450 .usb_types = axp813_usb_types, 451 .num_usb_types = ARRAY_SIZE(axp813_usb_types), 452}; 453 454static const char * const axp20x_irq_names[] = { 455 "VBUS_PLUGIN", 456 "VBUS_REMOVAL", 457 "VBUS_VALID", 458 "VBUS_NOT_VALID", 459}; 460 461static const char * const axp22x_irq_names[] = { 462 "VBUS_PLUGIN", 463 "VBUS_REMOVAL", 464}; 465 466static int axp192_usb_curr_lim_table[] = { 467 -1, 468 -1, 469 500000, 470 100000, 471}; 472 473static int axp20x_usb_curr_lim_table[] = { 474 900000, 475 500000, 476 100000, 477 -1, 478}; 479 480static int axp221_usb_curr_lim_table[] = { 481 900000, 482 500000, 483 -1, 484 -1, 485}; 486 487static int axp813_usb_curr_lim_table[] = { 488 100000, 489 500000, 490 900000, 491 1500000, 492 2000000, 493 2500000, 494 3000000, 495 3500000, 496 4000000, 497}; 498 499static const struct axp_data axp192_data = { 500 .power_desc = &axp20x_usb_power_desc, 501 .irq_names = axp20x_irq_names, 502 .num_irq_names = ARRAY_SIZE(axp20x_irq_names), 503 .curr_lim_table = axp192_usb_curr_lim_table, 504 .curr_lim_table_size = ARRAY_SIZE(axp192_usb_curr_lim_table), 505 .curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1), 506 .vbus_valid_bit = REG_FIELD(AXP192_USB_OTG_STATUS, 2, 2), 507 .vbus_mon_bit = REG_FIELD(AXP20X_VBUS_MON, 3, 3), 508}; 509 510static const struct axp_data axp202_data = { 511 .power_desc = &axp20x_usb_power_desc, 512 .irq_names = axp20x_irq_names, 513 .num_irq_names = ARRAY_SIZE(axp20x_irq_names), 514 .curr_lim_table = axp20x_usb_curr_lim_table, 515 .curr_lim_table_size = ARRAY_SIZE(axp20x_usb_curr_lim_table), 516 .curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1), 517 .vbus_valid_bit = REG_FIELD(AXP20X_USB_OTG_STATUS, 2, 2), 518 .vbus_mon_bit = REG_FIELD(AXP20X_VBUS_MON, 3, 3), 519}; 520 521static const struct axp_data axp221_data = { 522 .power_desc = &axp22x_usb_power_desc, 523 .irq_names = axp22x_irq_names, 524 .num_irq_names = ARRAY_SIZE(axp22x_irq_names), 525 .curr_lim_table = axp221_usb_curr_lim_table, 526 .curr_lim_table_size = ARRAY_SIZE(axp221_usb_curr_lim_table), 527 .curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1), 528 .vbus_needs_polling = true, 529}; 530 531static const struct axp_data axp223_data = { 532 .power_desc = &axp22x_usb_power_desc, 533 .irq_names = axp22x_irq_names, 534 .num_irq_names = ARRAY_SIZE(axp22x_irq_names), 535 .curr_lim_table = axp20x_usb_curr_lim_table, 536 .curr_lim_table_size = ARRAY_SIZE(axp20x_usb_curr_lim_table), 537 .curr_lim_fld = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 0, 1), 538 .vbus_needs_polling = true, 539}; 540 541static const struct axp_data axp813_data = { 542 .power_desc = &axp813_usb_power_desc, 543 .irq_names = axp22x_irq_names, 544 .num_irq_names = ARRAY_SIZE(axp22x_irq_names), 545 .curr_lim_table = axp813_usb_curr_lim_table, 546 .curr_lim_table_size = ARRAY_SIZE(axp813_usb_curr_lim_table), 547 .curr_lim_fld = REG_FIELD(AXP22X_CHRG_CTRL3, 4, 7), 548 .usb_bc_en_bit = REG_FIELD(AXP288_BC_GLOBAL, 0, 0), 549 .usb_bc_det_fld = REG_FIELD(AXP288_BC_DET_STAT, 5, 7), 550 .vbus_disable_bit = REG_FIELD(AXP20X_VBUS_IPSOUT_MGMT, 7, 7), 551 .vbus_needs_polling = true, 552}; 553 554#ifdef CONFIG_PM_SLEEP 555static int axp20x_usb_power_suspend(struct device *dev) 556{ 557 struct axp20x_usb_power *power = dev_get_drvdata(dev); 558 int i = 0; 559 560 /* 561 * Allow wake via VBUS_PLUGIN only. 562 * 563 * As nested threaded IRQs are not automatically disabled during 564 * suspend, we must explicitly disable the remainder of the IRQs. 565 */ 566 if (device_may_wakeup(&power->supply->dev)) 567 enable_irq_wake(power->irqs[i++]); 568 while (i < power->num_irqs) 569 disable_irq(power->irqs[i++]); 570 571 return 0; 572} 573 574static int axp20x_usb_power_resume(struct device *dev) 575{ 576 struct axp20x_usb_power *power = dev_get_drvdata(dev); 577 int i = 0; 578 579 if (device_may_wakeup(&power->supply->dev)) 580 disable_irq_wake(power->irqs[i++]); 581 while (i < power->num_irqs) 582 enable_irq(power->irqs[i++]); 583 584 mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME); 585 586 return 0; 587} 588#endif 589 590static SIMPLE_DEV_PM_OPS(axp20x_usb_power_pm_ops, axp20x_usb_power_suspend, 591 axp20x_usb_power_resume); 592 593static int configure_iio_channels(struct platform_device *pdev, 594 struct axp20x_usb_power *power) 595{ 596 power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v"); 597 if (IS_ERR(power->vbus_v)) { 598 if (PTR_ERR(power->vbus_v) == -ENODEV) 599 return -EPROBE_DEFER; 600 return PTR_ERR(power->vbus_v); 601 } 602 603 power->vbus_i = devm_iio_channel_get(&pdev->dev, "vbus_i"); 604 if (IS_ERR(power->vbus_i)) { 605 if (PTR_ERR(power->vbus_i) == -ENODEV) 606 return -EPROBE_DEFER; 607 return PTR_ERR(power->vbus_i); 608 } 609 610 return 0; 611} 612 613static int configure_adc_registers(struct axp20x_usb_power *power) 614{ 615 /* Enable vbus voltage and current measurement */ 616 return regmap_update_bits(power->regmap, AXP20X_ADC_EN1, 617 AXP20X_ADC_EN1_VBUS_CURR | 618 AXP20X_ADC_EN1_VBUS_VOLT, 619 AXP20X_ADC_EN1_VBUS_CURR | 620 AXP20X_ADC_EN1_VBUS_VOLT); 621} 622 623static int axp20x_regmap_field_alloc_optional(struct device *dev, 624 struct regmap *regmap, 625 struct reg_field fdesc, 626 struct regmap_field **fieldp) 627{ 628 struct regmap_field *field; 629 630 if (fdesc.reg == 0) { 631 *fieldp = NULL; 632 return 0; 633 } 634 635 field = devm_regmap_field_alloc(dev, regmap, fdesc); 636 if (IS_ERR(field)) 637 return PTR_ERR(field); 638 639 *fieldp = field; 640 return 0; 641} 642 643static int axp20x_usb_power_probe(struct platform_device *pdev) 644{ 645 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); 646 struct power_supply_config psy_cfg = {}; 647 struct axp20x_usb_power *power; 648 const struct axp_data *axp_data; 649 int i, irq, ret; 650 651 if (!of_device_is_available(pdev->dev.of_node)) 652 return -ENODEV; 653 654 if (!axp20x) { 655 dev_err(&pdev->dev, "Parent drvdata not set\n"); 656 return -EINVAL; 657 } 658 659 axp_data = of_device_get_match_data(&pdev->dev); 660 661 power = devm_kzalloc(&pdev->dev, 662 struct_size(power, irqs, axp_data->num_irq_names), 663 GFP_KERNEL); 664 if (!power) 665 return -ENOMEM; 666 667 platform_set_drvdata(pdev, power); 668 669 power->dev = &pdev->dev; 670 power->axp_data = axp_data; 671 power->regmap = axp20x->regmap; 672 power->num_irqs = axp_data->num_irq_names; 673 674 power->curr_lim_fld = devm_regmap_field_alloc(&pdev->dev, power->regmap, 675 axp_data->curr_lim_fld); 676 if (IS_ERR(power->curr_lim_fld)) 677 return PTR_ERR(power->curr_lim_fld); 678 679 ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap, 680 axp_data->vbus_valid_bit, 681 &power->vbus_valid_bit); 682 if (ret) 683 return ret; 684 685 ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap, 686 axp_data->vbus_mon_bit, 687 &power->vbus_mon_bit); 688 if (ret) 689 return ret; 690 691 ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap, 692 axp_data->usb_bc_en_bit, 693 &power->usb_bc_en_bit); 694 if (ret) 695 return ret; 696 697 ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap, 698 axp_data->usb_bc_det_fld, 699 &power->usb_bc_det_fld); 700 if (ret) 701 return ret; 702 703 ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap, 704 axp_data->vbus_disable_bit, 705 &power->vbus_disable_bit); 706 if (ret) 707 return ret; 708 709 ret = devm_delayed_work_autocancel(&pdev->dev, &power->vbus_detect, 710 axp20x_usb_power_poll_vbus); 711 if (ret) 712 return ret; 713 714 if (power->vbus_mon_bit) { 715 /* Enable vbus valid checking */ 716 ret = regmap_field_write(power->vbus_mon_bit, 1); 717 if (ret) 718 return ret; 719 720 if (IS_ENABLED(CONFIG_AXP20X_ADC)) 721 ret = configure_iio_channels(pdev, power); 722 else 723 ret = configure_adc_registers(power); 724 725 if (ret) 726 return ret; 727 } 728 729 if (power->usb_bc_en_bit) { 730 /* Enable USB Battery Charging specification detection */ 731 ret = regmap_field_write(power->usb_bc_en_bit, 1); 732 if (ret) 733 return ret; 734 } 735 736 psy_cfg.of_node = pdev->dev.of_node; 737 psy_cfg.drv_data = power; 738 739 power->supply = devm_power_supply_register(&pdev->dev, 740 axp_data->power_desc, 741 &psy_cfg); 742 if (IS_ERR(power->supply)) 743 return PTR_ERR(power->supply); 744 745 /* Request irqs after registering, as irqs may trigger immediately */ 746 for (i = 0; i < axp_data->num_irq_names; i++) { 747 irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]); 748 if (irq < 0) 749 return irq; 750 751 power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq); 752 ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i], 753 axp20x_usb_power_irq, 0, 754 DRVNAME, power); 755 if (ret < 0) { 756 dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n", 757 axp_data->irq_names[i], ret); 758 return ret; 759 } 760 } 761 762 if (axp20x_usb_vbus_needs_polling(power)) 763 queue_delayed_work(system_power_efficient_wq, &power->vbus_detect, 0); 764 765 return 0; 766} 767 768static const struct of_device_id axp20x_usb_power_match[] = { 769 { 770 .compatible = "x-powers,axp192-usb-power-supply", 771 .data = &axp192_data, 772 }, { 773 .compatible = "x-powers,axp202-usb-power-supply", 774 .data = &axp202_data, 775 }, { 776 .compatible = "x-powers,axp221-usb-power-supply", 777 .data = &axp221_data, 778 }, { 779 .compatible = "x-powers,axp223-usb-power-supply", 780 .data = &axp223_data, 781 }, { 782 .compatible = "x-powers,axp813-usb-power-supply", 783 .data = &axp813_data, 784 }, { /* sentinel */ } 785}; 786MODULE_DEVICE_TABLE(of, axp20x_usb_power_match); 787 788static struct platform_driver axp20x_usb_power_driver = { 789 .probe = axp20x_usb_power_probe, 790 .driver = { 791 .name = DRVNAME, 792 .of_match_table = axp20x_usb_power_match, 793 .pm = &axp20x_usb_power_pm_ops, 794 }, 795}; 796 797module_platform_driver(axp20x_usb_power_driver); 798 799MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 800MODULE_DESCRIPTION("AXP20x PMIC USB power supply status driver"); 801MODULE_LICENSE("GPL"); 802