1 /* 2 * wm831x-dcdc.c -- DC-DC buck convertor driver for the WM831x series 3 * 4 * Copyright 2009 Wolfson Microelectronics PLC. 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/bitops.h> 18 #include <linux/err.h> 19 #include <linux/i2c.h> 20 #include <linux/platform_device.h> 21 #include <linux/regulator/driver.h> 22 #include <linux/regulator/machine.h> 23 #include <linux/gpio.h> 24 #include <linux/slab.h> 25 26 #include <linux/mfd/wm831x/core.h> 27 #include <linux/mfd/wm831x/regulator.h> 28 #include <linux/mfd/wm831x/pdata.h> 29 30 #define WM831X_BUCKV_MAX_SELECTOR 0x68 31 #define WM831X_BUCKP_MAX_SELECTOR 0x66 32 33 #define WM831X_DCDC_MODE_FAST 0 34 #define WM831X_DCDC_MODE_NORMAL 1 35 #define WM831X_DCDC_MODE_IDLE 2 36 #define WM831X_DCDC_MODE_STANDBY 3 37 38 #define WM831X_DCDC_MAX_NAME 9 39 40 /* Register offsets in control block */ 41 #define WM831X_DCDC_CONTROL_1 0 42 #define WM831X_DCDC_CONTROL_2 1 43 #define WM831X_DCDC_ON_CONFIG 2 44 #define WM831X_DCDC_SLEEP_CONTROL 3 45 #define WM831X_DCDC_DVS_CONTROL 4 46 47 /* 48 * Shared 49 */ 50 51 struct wm831x_dcdc { 52 char name[WM831X_DCDC_MAX_NAME]; 53 char supply_name[WM831X_DCDC_MAX_NAME]; 54 struct regulator_desc desc; 55 int base; 56 struct wm831x *wm831x; 57 struct regulator_dev *regulator; 58 int dvs_gpio; 59 int dvs_gpio_state; 60 int on_vsel; 61 int dvs_vsel; 62 }; 63 64 static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev) 65 66 { 67 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 68 struct wm831x *wm831x = dcdc->wm831x; 69 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 70 int val; 71 72 val = wm831x_reg_read(wm831x, reg); 73 if (val < 0) 74 return val; 75 76 val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT; 77 78 switch (val) { 79 case WM831X_DCDC_MODE_FAST: 80 return REGULATOR_MODE_FAST; 81 case WM831X_DCDC_MODE_NORMAL: 82 return REGULATOR_MODE_NORMAL; 83 case WM831X_DCDC_MODE_STANDBY: 84 return REGULATOR_MODE_STANDBY; 85 case WM831X_DCDC_MODE_IDLE: 86 return REGULATOR_MODE_IDLE; 87 default: 88 BUG(); 89 return -EINVAL; 90 } 91 } 92 93 static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg, 94 unsigned int mode) 95 { 96 int val; 97 98 switch (mode) { 99 case REGULATOR_MODE_FAST: 100 val = WM831X_DCDC_MODE_FAST; 101 break; 102 case REGULATOR_MODE_NORMAL: 103 val = WM831X_DCDC_MODE_NORMAL; 104 break; 105 case REGULATOR_MODE_STANDBY: 106 val = WM831X_DCDC_MODE_STANDBY; 107 break; 108 case REGULATOR_MODE_IDLE: 109 val = WM831X_DCDC_MODE_IDLE; 110 break; 111 default: 112 return -EINVAL; 113 } 114 115 return wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK, 116 val << WM831X_DC1_ON_MODE_SHIFT); 117 } 118 119 static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode) 120 { 121 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 122 struct wm831x *wm831x = dcdc->wm831x; 123 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 124 125 return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 126 } 127 128 static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev, 129 unsigned int mode) 130 { 131 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 132 struct wm831x *wm831x = dcdc->wm831x; 133 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 134 135 return wm831x_dcdc_set_mode_int(wm831x, reg, mode); 136 } 137 138 static int wm831x_dcdc_get_status(struct regulator_dev *rdev) 139 { 140 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 141 struct wm831x *wm831x = dcdc->wm831x; 142 int ret; 143 144 /* First, check for errors */ 145 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 146 if (ret < 0) 147 return ret; 148 149 if (ret & (1 << rdev_get_id(rdev))) { 150 dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 151 rdev_get_id(rdev) + 1); 152 return REGULATOR_STATUS_ERROR; 153 } 154 155 /* DCDC1 and DCDC2 can additionally detect high voltage/current */ 156 if (rdev_get_id(rdev) < 2) { 157 if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) { 158 dev_dbg(wm831x->dev, "DCDC%d over voltage\n", 159 rdev_get_id(rdev) + 1); 160 return REGULATOR_STATUS_ERROR; 161 } 162 163 if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) { 164 dev_dbg(wm831x->dev, "DCDC%d over current\n", 165 rdev_get_id(rdev) + 1); 166 return REGULATOR_STATUS_ERROR; 167 } 168 } 169 170 /* Is the regulator on? */ 171 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 172 if (ret < 0) 173 return ret; 174 if (!(ret & (1 << rdev_get_id(rdev)))) 175 return REGULATOR_STATUS_OFF; 176 177 /* TODO: When we handle hardware control modes so we can report the 178 * current mode. */ 179 return REGULATOR_STATUS_ON; 180 } 181 182 static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data) 183 { 184 struct wm831x_dcdc *dcdc = data; 185 186 regulator_notifier_call_chain(dcdc->regulator, 187 REGULATOR_EVENT_UNDER_VOLTAGE, 188 NULL); 189 190 return IRQ_HANDLED; 191 } 192 193 static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data) 194 { 195 struct wm831x_dcdc *dcdc = data; 196 197 regulator_notifier_call_chain(dcdc->regulator, 198 REGULATOR_EVENT_OVER_CURRENT, 199 NULL); 200 201 return IRQ_HANDLED; 202 } 203 204 /* 205 * BUCKV specifics 206 */ 207 208 static int wm831x_buckv_list_voltage(struct regulator_dev *rdev, 209 unsigned selector) 210 { 211 if (selector <= 0x8) 212 return 600000; 213 if (selector <= WM831X_BUCKV_MAX_SELECTOR) 214 return 600000 + ((selector - 0x8) * 12500); 215 return -EINVAL; 216 } 217 218 static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev, 219 int min_uV, int max_uV) 220 { 221 u16 vsel; 222 223 if (min_uV < 600000) 224 vsel = 0; 225 else if (min_uV <= 1800000) 226 vsel = ((min_uV - 600000) / 12500) + 8; 227 else 228 return -EINVAL; 229 230 if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV) 231 return -EINVAL; 232 233 return vsel; 234 } 235 236 static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state) 237 { 238 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 239 240 if (state == dcdc->dvs_gpio_state) 241 return 0; 242 243 dcdc->dvs_gpio_state = state; 244 gpio_set_value(dcdc->dvs_gpio, state); 245 246 /* Should wait for DVS state change to be asserted if we have 247 * a GPIO for it, for now assume the device is configured 248 * for the fastest possible transition. 249 */ 250 251 return 0; 252 } 253 254 static int wm831x_buckv_set_voltage(struct regulator_dev *rdev, 255 int min_uV, int max_uV, unsigned *selector) 256 { 257 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 258 struct wm831x *wm831x = dcdc->wm831x; 259 int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 260 int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL; 261 int vsel, ret; 262 263 vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV); 264 if (vsel < 0) 265 return vsel; 266 267 *selector = vsel; 268 269 /* If this value is already set then do a GPIO update if we can */ 270 if (dcdc->dvs_gpio && dcdc->on_vsel == vsel) 271 return wm831x_buckv_set_dvs(rdev, 0); 272 273 if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel) 274 return wm831x_buckv_set_dvs(rdev, 1); 275 276 /* Always set the ON status to the minimum voltage */ 277 ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel); 278 if (ret < 0) 279 return ret; 280 dcdc->on_vsel = vsel; 281 282 if (!dcdc->dvs_gpio) 283 return ret; 284 285 /* Kick the voltage transition now */ 286 ret = wm831x_buckv_set_dvs(rdev, 0); 287 if (ret < 0) 288 return ret; 289 290 /* 291 * If this VSEL is higher than the last one we've seen then 292 * remember it as the DVS VSEL. This is optimised for CPUfreq 293 * usage where we want to get to the highest voltage very 294 * quickly. 295 */ 296 if (vsel > dcdc->dvs_vsel) { 297 ret = wm831x_set_bits(wm831x, dvs_reg, 298 WM831X_DC1_DVS_VSEL_MASK, 299 dcdc->dvs_vsel); 300 if (ret == 0) 301 dcdc->dvs_vsel = vsel; 302 else 303 dev_warn(wm831x->dev, 304 "Failed to set DCDC DVS VSEL: %d\n", ret); 305 } 306 307 return 0; 308 } 309 310 static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev, 311 int uV) 312 { 313 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 314 struct wm831x *wm831x = dcdc->wm831x; 315 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 316 int vsel; 317 318 vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV); 319 if (vsel < 0) 320 return vsel; 321 322 return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel); 323 } 324 325 static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev) 326 { 327 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 328 329 if (dcdc->dvs_gpio && dcdc->dvs_gpio_state) 330 return dcdc->dvs_vsel; 331 else 332 return dcdc->on_vsel; 333 } 334 335 /* Current limit options */ 336 static u16 wm831x_dcdc_ilim[] = { 337 125, 250, 375, 500, 625, 750, 875, 1000 338 }; 339 340 static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev, 341 int min_uA, int max_uA) 342 { 343 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 344 struct wm831x *wm831x = dcdc->wm831x; 345 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 346 int i; 347 348 for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) { 349 if ((min_uA <= wm831x_dcdc_ilim[i]) && 350 (wm831x_dcdc_ilim[i] <= max_uA)) 351 break; 352 } 353 if (i == ARRAY_SIZE(wm831x_dcdc_ilim)) 354 return -EINVAL; 355 356 return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, 357 i << WM831X_DC1_HC_THR_SHIFT); 358 } 359 360 static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev) 361 { 362 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 363 struct wm831x *wm831x = dcdc->wm831x; 364 u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2; 365 int val; 366 367 val = wm831x_reg_read(wm831x, reg); 368 if (val < 0) 369 return val; 370 371 val = (val & WM831X_DC1_HC_THR_MASK) >> WM831X_DC1_HC_THR_SHIFT; 372 return wm831x_dcdc_ilim[val]; 373 } 374 375 static struct regulator_ops wm831x_buckv_ops = { 376 .set_voltage = wm831x_buckv_set_voltage, 377 .get_voltage_sel = wm831x_buckv_get_voltage_sel, 378 .list_voltage = wm831x_buckv_list_voltage, 379 .set_suspend_voltage = wm831x_buckv_set_suspend_voltage, 380 .set_current_limit = wm831x_buckv_set_current_limit, 381 .get_current_limit = wm831x_buckv_get_current_limit, 382 383 .is_enabled = regulator_is_enabled_regmap, 384 .enable = regulator_enable_regmap, 385 .disable = regulator_disable_regmap, 386 .get_status = wm831x_dcdc_get_status, 387 .get_mode = wm831x_dcdc_get_mode, 388 .set_mode = wm831x_dcdc_set_mode, 389 .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 390 }; 391 392 /* 393 * Set up DVS control. We just log errors since we can still run 394 * (with reduced performance) if we fail. 395 */ 396 static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc, 397 struct wm831x_buckv_pdata *pdata) 398 { 399 struct wm831x *wm831x = dcdc->wm831x; 400 int ret; 401 u16 ctrl; 402 403 if (!pdata || !pdata->dvs_gpio) 404 return; 405 406 /* gpiolib won't let us read the GPIO status so pick the higher 407 * of the two existing voltages so we take it as platform data. 408 */ 409 dcdc->dvs_gpio_state = pdata->dvs_init_state; 410 411 ret = gpio_request_one(pdata->dvs_gpio, 412 dcdc->dvs_gpio_state ? GPIOF_INIT_HIGH : 0, 413 "DCDC DVS"); 414 if (ret < 0) { 415 dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n", 416 dcdc->name, ret); 417 return; 418 } 419 420 dcdc->dvs_gpio = pdata->dvs_gpio; 421 422 switch (pdata->dvs_control_src) { 423 case 1: 424 ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT; 425 break; 426 case 2: 427 ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT; 428 break; 429 default: 430 dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n", 431 pdata->dvs_control_src, dcdc->name); 432 return; 433 } 434 435 /* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL 436 * to make bootstrapping a bit smoother. 437 */ 438 if (!dcdc->dvs_vsel) { 439 ret = wm831x_set_bits(wm831x, 440 dcdc->base + WM831X_DCDC_DVS_CONTROL, 441 WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel); 442 if (ret == 0) 443 dcdc->dvs_vsel = dcdc->on_vsel; 444 else 445 dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n", 446 ret); 447 } 448 449 ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL, 450 WM831X_DC1_DVS_SRC_MASK, ctrl); 451 if (ret < 0) { 452 dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n", 453 dcdc->name, ret); 454 } 455 } 456 457 static __devinit int wm831x_buckv_probe(struct platform_device *pdev) 458 { 459 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 460 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 461 struct regulator_config config = { }; 462 int id; 463 struct wm831x_dcdc *dcdc; 464 struct resource *res; 465 int ret, irq; 466 467 if (pdata && pdata->wm831x_num) 468 id = (pdata->wm831x_num * 10) + 1; 469 else 470 id = 0; 471 id = pdev->id - id; 472 473 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 474 475 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 476 GFP_KERNEL); 477 if (dcdc == NULL) { 478 dev_err(&pdev->dev, "Unable to allocate private data\n"); 479 return -ENOMEM; 480 } 481 482 dcdc->wm831x = wm831x; 483 484 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 485 if (res == NULL) { 486 dev_err(&pdev->dev, "No I/O resource\n"); 487 ret = -EINVAL; 488 goto err; 489 } 490 dcdc->base = res->start; 491 492 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 493 dcdc->desc.name = dcdc->name; 494 495 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 496 "DC%dVDD", id + 1); 497 dcdc->desc.supply_name = dcdc->supply_name; 498 499 dcdc->desc.id = id; 500 dcdc->desc.type = REGULATOR_VOLTAGE; 501 dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1; 502 dcdc->desc.ops = &wm831x_buckv_ops; 503 dcdc->desc.owner = THIS_MODULE; 504 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 505 dcdc->desc.enable_mask = 1 << id; 506 507 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG); 508 if (ret < 0) { 509 dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret); 510 goto err; 511 } 512 dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK; 513 514 ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL); 515 if (ret < 0) { 516 dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret); 517 goto err; 518 } 519 dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK; 520 521 if (pdata && pdata->dcdc[id]) 522 wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); 523 524 config.dev = pdev->dev.parent; 525 if (pdata) 526 config.init_data = pdata->dcdc[id]; 527 config.driver_data = dcdc; 528 config.regmap = wm831x->regmap; 529 530 dcdc->regulator = regulator_register(&dcdc->desc, &config); 531 if (IS_ERR(dcdc->regulator)) { 532 ret = PTR_ERR(dcdc->regulator); 533 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 534 id + 1, ret); 535 goto err; 536 } 537 538 irq = platform_get_irq_byname(pdev, "UV"); 539 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 540 IRQF_TRIGGER_RISING, dcdc->name, dcdc); 541 if (ret != 0) { 542 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 543 irq, ret); 544 goto err_regulator; 545 } 546 547 irq = platform_get_irq_byname(pdev, "HC"); 548 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq, 549 IRQF_TRIGGER_RISING, dcdc->name, dcdc); 550 if (ret != 0) { 551 dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n", 552 irq, ret); 553 goto err_uv; 554 } 555 556 platform_set_drvdata(pdev, dcdc); 557 558 return 0; 559 560 err_uv: 561 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 562 err_regulator: 563 regulator_unregister(dcdc->regulator); 564 err: 565 if (dcdc->dvs_gpio) 566 gpio_free(dcdc->dvs_gpio); 567 return ret; 568 } 569 570 static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 571 { 572 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 573 574 platform_set_drvdata(pdev, NULL); 575 576 free_irq(platform_get_irq_byname(pdev, "HC"), dcdc); 577 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 578 regulator_unregister(dcdc->regulator); 579 if (dcdc->dvs_gpio) 580 gpio_free(dcdc->dvs_gpio); 581 582 return 0; 583 } 584 585 static struct platform_driver wm831x_buckv_driver = { 586 .probe = wm831x_buckv_probe, 587 .remove = __devexit_p(wm831x_buckv_remove), 588 .driver = { 589 .name = "wm831x-buckv", 590 .owner = THIS_MODULE, 591 }, 592 }; 593 594 /* 595 * BUCKP specifics 596 */ 597 598 static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, 599 unsigned selector) 600 { 601 if (selector <= WM831X_BUCKP_MAX_SELECTOR) 602 return 850000 + (selector * 25000); 603 else 604 return -EINVAL; 605 } 606 607 static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, 608 int min_uV, int max_uV, int *selector) 609 { 610 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 611 struct wm831x *wm831x = dcdc->wm831x; 612 u16 vsel; 613 614 if (min_uV <= 34000000) 615 vsel = (min_uV - 850000) / 25000; 616 else 617 return -EINVAL; 618 619 if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) 620 return -EINVAL; 621 622 *selector = vsel; 623 624 return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); 625 } 626 627 static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, 628 int min_uV, int max_uV, 629 unsigned *selector) 630 { 631 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 632 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 633 634 return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV, 635 selector); 636 } 637 638 static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, 639 int uV) 640 { 641 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 642 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 643 unsigned selector; 644 645 return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector); 646 } 647 648 static struct regulator_ops wm831x_buckp_ops = { 649 .set_voltage = wm831x_buckp_set_voltage, 650 .get_voltage_sel = regulator_get_voltage_sel_regmap, 651 .list_voltage = wm831x_buckp_list_voltage, 652 .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 653 654 .is_enabled = regulator_is_enabled_regmap, 655 .enable = regulator_enable_regmap, 656 .disable = regulator_disable_regmap, 657 .get_status = wm831x_dcdc_get_status, 658 .get_mode = wm831x_dcdc_get_mode, 659 .set_mode = wm831x_dcdc_set_mode, 660 .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 661 }; 662 663 static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 664 { 665 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 666 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 667 struct regulator_config config = { }; 668 int id; 669 struct wm831x_dcdc *dcdc; 670 struct resource *res; 671 int ret, irq; 672 673 if (pdata && pdata->wm831x_num) 674 id = (pdata->wm831x_num * 10) + 1; 675 else 676 id = 0; 677 id = pdev->id - id; 678 679 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 680 681 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 682 GFP_KERNEL); 683 if (dcdc == NULL) { 684 dev_err(&pdev->dev, "Unable to allocate private data\n"); 685 return -ENOMEM; 686 } 687 688 dcdc->wm831x = wm831x; 689 690 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 691 if (res == NULL) { 692 dev_err(&pdev->dev, "No I/O resource\n"); 693 ret = -EINVAL; 694 goto err; 695 } 696 dcdc->base = res->start; 697 698 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 699 dcdc->desc.name = dcdc->name; 700 701 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 702 "DC%dVDD", id + 1); 703 dcdc->desc.supply_name = dcdc->supply_name; 704 705 dcdc->desc.id = id; 706 dcdc->desc.type = REGULATOR_VOLTAGE; 707 dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 708 dcdc->desc.ops = &wm831x_buckp_ops; 709 dcdc->desc.owner = THIS_MODULE; 710 dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 711 dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK; 712 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 713 dcdc->desc.enable_mask = 1 << id; 714 715 config.dev = pdev->dev.parent; 716 if (pdata) 717 config.init_data = pdata->dcdc[id]; 718 config.driver_data = dcdc; 719 config.regmap = wm831x->regmap; 720 721 dcdc->regulator = regulator_register(&dcdc->desc, &config); 722 if (IS_ERR(dcdc->regulator)) { 723 ret = PTR_ERR(dcdc->regulator); 724 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 725 id + 1, ret); 726 goto err; 727 } 728 729 irq = platform_get_irq_byname(pdev, "UV"); 730 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 731 IRQF_TRIGGER_RISING, dcdc->name, dcdc); 732 if (ret != 0) { 733 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 734 irq, ret); 735 goto err_regulator; 736 } 737 738 platform_set_drvdata(pdev, dcdc); 739 740 return 0; 741 742 err_regulator: 743 regulator_unregister(dcdc->regulator); 744 err: 745 return ret; 746 } 747 748 static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 749 { 750 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 751 752 platform_set_drvdata(pdev, NULL); 753 754 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 755 regulator_unregister(dcdc->regulator); 756 757 return 0; 758 } 759 760 static struct platform_driver wm831x_buckp_driver = { 761 .probe = wm831x_buckp_probe, 762 .remove = __devexit_p(wm831x_buckp_remove), 763 .driver = { 764 .name = "wm831x-buckp", 765 .owner = THIS_MODULE, 766 }, 767 }; 768 769 /* 770 * DCDC boost convertors 771 */ 772 773 static int wm831x_boostp_get_status(struct regulator_dev *rdev) 774 { 775 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 776 struct wm831x *wm831x = dcdc->wm831x; 777 int ret; 778 779 /* First, check for errors */ 780 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 781 if (ret < 0) 782 return ret; 783 784 if (ret & (1 << rdev_get_id(rdev))) { 785 dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 786 rdev_get_id(rdev) + 1); 787 return REGULATOR_STATUS_ERROR; 788 } 789 790 /* Is the regulator on? */ 791 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 792 if (ret < 0) 793 return ret; 794 if (ret & (1 << rdev_get_id(rdev))) 795 return REGULATOR_STATUS_ON; 796 else 797 return REGULATOR_STATUS_OFF; 798 } 799 800 static struct regulator_ops wm831x_boostp_ops = { 801 .get_status = wm831x_boostp_get_status, 802 803 .is_enabled = regulator_is_enabled_regmap, 804 .enable = regulator_enable_regmap, 805 .disable = regulator_disable_regmap, 806 }; 807 808 static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 809 { 810 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 811 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 812 struct regulator_config config = { }; 813 int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 814 struct wm831x_dcdc *dcdc; 815 struct resource *res; 816 int ret, irq; 817 818 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 819 820 if (pdata == NULL || pdata->dcdc[id] == NULL) 821 return -ENODEV; 822 823 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 824 if (dcdc == NULL) { 825 dev_err(&pdev->dev, "Unable to allocate private data\n"); 826 return -ENOMEM; 827 } 828 829 dcdc->wm831x = wm831x; 830 831 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 832 if (res == NULL) { 833 dev_err(&pdev->dev, "No I/O resource\n"); 834 ret = -EINVAL; 835 goto err; 836 } 837 dcdc->base = res->start; 838 839 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 840 dcdc->desc.name = dcdc->name; 841 dcdc->desc.id = id; 842 dcdc->desc.type = REGULATOR_VOLTAGE; 843 dcdc->desc.ops = &wm831x_boostp_ops; 844 dcdc->desc.owner = THIS_MODULE; 845 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 846 dcdc->desc.enable_mask = 1 << id; 847 848 config.dev = pdev->dev.parent; 849 if (pdata) 850 config.init_data = pdata->dcdc[id]; 851 config.driver_data = dcdc; 852 config.regmap = wm831x->regmap; 853 854 dcdc->regulator = regulator_register(&dcdc->desc, &config); 855 if (IS_ERR(dcdc->regulator)) { 856 ret = PTR_ERR(dcdc->regulator); 857 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 858 id + 1, ret); 859 goto err; 860 } 861 862 irq = platform_get_irq_byname(pdev, "UV"); 863 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 864 IRQF_TRIGGER_RISING, dcdc->name, 865 dcdc); 866 if (ret != 0) { 867 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 868 irq, ret); 869 goto err_regulator; 870 } 871 872 platform_set_drvdata(pdev, dcdc); 873 874 return 0; 875 876 err_regulator: 877 regulator_unregister(dcdc->regulator); 878 err: 879 return ret; 880 } 881 882 static __devexit int wm831x_boostp_remove(struct platform_device *pdev) 883 { 884 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 885 886 platform_set_drvdata(pdev, NULL); 887 888 free_irq(platform_get_irq_byname(pdev, "UV"), dcdc); 889 regulator_unregister(dcdc->regulator); 890 891 return 0; 892 } 893 894 static struct platform_driver wm831x_boostp_driver = { 895 .probe = wm831x_boostp_probe, 896 .remove = __devexit_p(wm831x_boostp_remove), 897 .driver = { 898 .name = "wm831x-boostp", 899 .owner = THIS_MODULE, 900 }, 901 }; 902 903 /* 904 * External Power Enable 905 * 906 * These aren't actually DCDCs but look like them in hardware so share 907 * code. 908 */ 909 910 #define WM831X_EPE_BASE 6 911 912 static struct regulator_ops wm831x_epe_ops = { 913 .is_enabled = regulator_is_enabled_regmap, 914 .enable = regulator_enable_regmap, 915 .disable = regulator_disable_regmap, 916 .get_status = wm831x_dcdc_get_status, 917 }; 918 919 static __devinit int wm831x_epe_probe(struct platform_device *pdev) 920 { 921 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 922 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 923 struct regulator_config config = { }; 924 int id = pdev->id % ARRAY_SIZE(pdata->epe); 925 struct wm831x_dcdc *dcdc; 926 int ret; 927 928 dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 929 930 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 931 if (dcdc == NULL) { 932 dev_err(&pdev->dev, "Unable to allocate private data\n"); 933 return -ENOMEM; 934 } 935 936 dcdc->wm831x = wm831x; 937 938 /* For current parts this is correct; probably need to revisit 939 * in future. 940 */ 941 snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 942 dcdc->desc.name = dcdc->name; 943 dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 944 dcdc->desc.ops = &wm831x_epe_ops; 945 dcdc->desc.type = REGULATOR_VOLTAGE; 946 dcdc->desc.owner = THIS_MODULE; 947 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 948 dcdc->desc.enable_mask = 1 << dcdc->desc.id; 949 950 config.dev = pdev->dev.parent; 951 if (pdata) 952 config.init_data = pdata->epe[id]; 953 config.driver_data = dcdc; 954 config.regmap = wm831x->regmap; 955 956 dcdc->regulator = regulator_register(&dcdc->desc, &config); 957 if (IS_ERR(dcdc->regulator)) { 958 ret = PTR_ERR(dcdc->regulator); 959 dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 960 id + 1, ret); 961 goto err; 962 } 963 964 platform_set_drvdata(pdev, dcdc); 965 966 return 0; 967 968 err: 969 return ret; 970 } 971 972 static __devexit int wm831x_epe_remove(struct platform_device *pdev) 973 { 974 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 975 976 platform_set_drvdata(pdev, NULL); 977 regulator_unregister(dcdc->regulator); 978 979 return 0; 980 } 981 982 static struct platform_driver wm831x_epe_driver = { 983 .probe = wm831x_epe_probe, 984 .remove = __devexit_p(wm831x_epe_remove), 985 .driver = { 986 .name = "wm831x-epe", 987 .owner = THIS_MODULE, 988 }, 989 }; 990 991 static int __init wm831x_dcdc_init(void) 992 { 993 int ret; 994 ret = platform_driver_register(&wm831x_buckv_driver); 995 if (ret != 0) 996 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 997 998 ret = platform_driver_register(&wm831x_buckp_driver); 999 if (ret != 0) 1000 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 1001 1002 ret = platform_driver_register(&wm831x_boostp_driver); 1003 if (ret != 0) 1004 pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 1005 1006 ret = platform_driver_register(&wm831x_epe_driver); 1007 if (ret != 0) 1008 pr_err("Failed to register WM831x EPE driver: %d\n", ret); 1009 1010 return 0; 1011 } 1012 subsys_initcall(wm831x_dcdc_init); 1013 1014 static void __exit wm831x_dcdc_exit(void) 1015 { 1016 platform_driver_unregister(&wm831x_epe_driver); 1017 platform_driver_unregister(&wm831x_boostp_driver); 1018 platform_driver_unregister(&wm831x_buckp_driver); 1019 platform_driver_unregister(&wm831x_buckv_driver); 1020 } 1021 module_exit(wm831x_dcdc_exit); 1022 1023 /* Module information */ 1024 MODULE_AUTHOR("Mark Brown"); 1025 MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 1026 MODULE_LICENSE("GPL"); 1027 MODULE_ALIAS("platform:wm831x-buckv"); 1028 MODULE_ALIAS("platform:wm831x-buckp"); 1029 MODULE_ALIAS("platform:wm831x-epe"); 1030