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 = wm831x_irq(wm831x, 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 = wm831x_irq(wm831x, 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(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")), 562 dcdc); 563 err_regulator: 564 regulator_unregister(dcdc->regulator); 565 err: 566 if (dcdc->dvs_gpio) 567 gpio_free(dcdc->dvs_gpio); 568 return ret; 569 } 570 571 static __devexit int wm831x_buckv_remove(struct platform_device *pdev) 572 { 573 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 574 struct wm831x *wm831x = dcdc->wm831x; 575 576 platform_set_drvdata(pdev, NULL); 577 578 free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "HC")), 579 dcdc); 580 free_irq(wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")), 581 dcdc); 582 regulator_unregister(dcdc->regulator); 583 if (dcdc->dvs_gpio) 584 gpio_free(dcdc->dvs_gpio); 585 586 return 0; 587 } 588 589 static struct platform_driver wm831x_buckv_driver = { 590 .probe = wm831x_buckv_probe, 591 .remove = __devexit_p(wm831x_buckv_remove), 592 .driver = { 593 .name = "wm831x-buckv", 594 .owner = THIS_MODULE, 595 }, 596 }; 597 598 /* 599 * BUCKP specifics 600 */ 601 602 static int wm831x_buckp_list_voltage(struct regulator_dev *rdev, 603 unsigned selector) 604 { 605 if (selector <= WM831X_BUCKP_MAX_SELECTOR) 606 return 850000 + (selector * 25000); 607 else 608 return -EINVAL; 609 } 610 611 static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg, 612 int min_uV, int max_uV, int *selector) 613 { 614 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 615 struct wm831x *wm831x = dcdc->wm831x; 616 u16 vsel; 617 618 if (min_uV <= 34000000) 619 vsel = (min_uV - 850000) / 25000; 620 else 621 return -EINVAL; 622 623 if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV) 624 return -EINVAL; 625 626 *selector = vsel; 627 628 return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel); 629 } 630 631 static int wm831x_buckp_set_voltage(struct regulator_dev *rdev, 632 int min_uV, int max_uV, 633 unsigned *selector) 634 { 635 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 636 u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 637 638 return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV, 639 selector); 640 } 641 642 static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev, 643 int uV) 644 { 645 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 646 u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL; 647 unsigned selector; 648 649 return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector); 650 } 651 652 static struct regulator_ops wm831x_buckp_ops = { 653 .set_voltage = wm831x_buckp_set_voltage, 654 .get_voltage_sel = regulator_get_voltage_sel_regmap, 655 .list_voltage = wm831x_buckp_list_voltage, 656 .set_suspend_voltage = wm831x_buckp_set_suspend_voltage, 657 658 .is_enabled = regulator_is_enabled_regmap, 659 .enable = regulator_enable_regmap, 660 .disable = regulator_disable_regmap, 661 .get_status = wm831x_dcdc_get_status, 662 .get_mode = wm831x_dcdc_get_mode, 663 .set_mode = wm831x_dcdc_set_mode, 664 .set_suspend_mode = wm831x_dcdc_set_suspend_mode, 665 }; 666 667 static __devinit int wm831x_buckp_probe(struct platform_device *pdev) 668 { 669 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 670 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 671 struct regulator_config config = { }; 672 int id; 673 struct wm831x_dcdc *dcdc; 674 struct resource *res; 675 int ret, irq; 676 677 if (pdata && pdata->wm831x_num) 678 id = (pdata->wm831x_num * 10) + 1; 679 else 680 id = 0; 681 id = pdev->id - id; 682 683 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 684 685 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), 686 GFP_KERNEL); 687 if (dcdc == NULL) { 688 dev_err(&pdev->dev, "Unable to allocate private data\n"); 689 return -ENOMEM; 690 } 691 692 dcdc->wm831x = wm831x; 693 694 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 695 if (res == NULL) { 696 dev_err(&pdev->dev, "No I/O resource\n"); 697 ret = -EINVAL; 698 goto err; 699 } 700 dcdc->base = res->start; 701 702 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 703 dcdc->desc.name = dcdc->name; 704 705 snprintf(dcdc->supply_name, sizeof(dcdc->supply_name), 706 "DC%dVDD", id + 1); 707 dcdc->desc.supply_name = dcdc->supply_name; 708 709 dcdc->desc.id = id; 710 dcdc->desc.type = REGULATOR_VOLTAGE; 711 dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1; 712 dcdc->desc.ops = &wm831x_buckp_ops; 713 dcdc->desc.owner = THIS_MODULE; 714 dcdc->desc.vsel_reg = dcdc->base + WM831X_DCDC_ON_CONFIG; 715 dcdc->desc.vsel_mask = WM831X_DC3_ON_VSEL_MASK; 716 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 717 dcdc->desc.enable_mask = 1 << id; 718 719 config.dev = pdev->dev.parent; 720 if (pdata) 721 config.init_data = pdata->dcdc[id]; 722 config.driver_data = dcdc; 723 config.regmap = wm831x->regmap; 724 725 dcdc->regulator = regulator_register(&dcdc->desc, &config); 726 if (IS_ERR(dcdc->regulator)) { 727 ret = PTR_ERR(dcdc->regulator); 728 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 729 id + 1, ret); 730 goto err; 731 } 732 733 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 734 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 735 IRQF_TRIGGER_RISING, dcdc->name, dcdc); 736 if (ret != 0) { 737 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 738 irq, ret); 739 goto err_regulator; 740 } 741 742 platform_set_drvdata(pdev, dcdc); 743 744 return 0; 745 746 err_regulator: 747 regulator_unregister(dcdc->regulator); 748 err: 749 return ret; 750 } 751 752 static __devexit int wm831x_buckp_remove(struct platform_device *pdev) 753 { 754 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 755 756 platform_set_drvdata(pdev, NULL); 757 758 free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), 759 dcdc); 760 regulator_unregister(dcdc->regulator); 761 762 return 0; 763 } 764 765 static struct platform_driver wm831x_buckp_driver = { 766 .probe = wm831x_buckp_probe, 767 .remove = __devexit_p(wm831x_buckp_remove), 768 .driver = { 769 .name = "wm831x-buckp", 770 .owner = THIS_MODULE, 771 }, 772 }; 773 774 /* 775 * DCDC boost convertors 776 */ 777 778 static int wm831x_boostp_get_status(struct regulator_dev *rdev) 779 { 780 struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev); 781 struct wm831x *wm831x = dcdc->wm831x; 782 int ret; 783 784 /* First, check for errors */ 785 ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS); 786 if (ret < 0) 787 return ret; 788 789 if (ret & (1 << rdev_get_id(rdev))) { 790 dev_dbg(wm831x->dev, "DCDC%d under voltage\n", 791 rdev_get_id(rdev) + 1); 792 return REGULATOR_STATUS_ERROR; 793 } 794 795 /* Is the regulator on? */ 796 ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS); 797 if (ret < 0) 798 return ret; 799 if (ret & (1 << rdev_get_id(rdev))) 800 return REGULATOR_STATUS_ON; 801 else 802 return REGULATOR_STATUS_OFF; 803 } 804 805 static struct regulator_ops wm831x_boostp_ops = { 806 .get_status = wm831x_boostp_get_status, 807 808 .is_enabled = regulator_is_enabled_regmap, 809 .enable = regulator_enable_regmap, 810 .disable = regulator_disable_regmap, 811 }; 812 813 static __devinit int wm831x_boostp_probe(struct platform_device *pdev) 814 { 815 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 816 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 817 struct regulator_config config = { }; 818 int id = pdev->id % ARRAY_SIZE(pdata->dcdc); 819 struct wm831x_dcdc *dcdc; 820 struct resource *res; 821 int ret, irq; 822 823 dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1); 824 825 if (pdata == NULL || pdata->dcdc[id] == NULL) 826 return -ENODEV; 827 828 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 829 if (dcdc == NULL) { 830 dev_err(&pdev->dev, "Unable to allocate private data\n"); 831 return -ENOMEM; 832 } 833 834 dcdc->wm831x = wm831x; 835 836 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 837 if (res == NULL) { 838 dev_err(&pdev->dev, "No I/O resource\n"); 839 ret = -EINVAL; 840 goto err; 841 } 842 dcdc->base = res->start; 843 844 snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1); 845 dcdc->desc.name = dcdc->name; 846 dcdc->desc.id = id; 847 dcdc->desc.type = REGULATOR_VOLTAGE; 848 dcdc->desc.ops = &wm831x_boostp_ops; 849 dcdc->desc.owner = THIS_MODULE; 850 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 851 dcdc->desc.enable_mask = 1 << id; 852 853 config.dev = pdev->dev.parent; 854 if (pdata) 855 config.init_data = pdata->dcdc[id]; 856 config.driver_data = dcdc; 857 config.regmap = wm831x->regmap; 858 859 dcdc->regulator = regulator_register(&dcdc->desc, &config); 860 if (IS_ERR(dcdc->regulator)) { 861 ret = PTR_ERR(dcdc->regulator); 862 dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", 863 id + 1, ret); 864 goto err; 865 } 866 867 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); 868 ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq, 869 IRQF_TRIGGER_RISING, dcdc->name, 870 dcdc); 871 if (ret != 0) { 872 dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", 873 irq, ret); 874 goto err_regulator; 875 } 876 877 platform_set_drvdata(pdev, dcdc); 878 879 return 0; 880 881 err_regulator: 882 regulator_unregister(dcdc->regulator); 883 err: 884 return ret; 885 } 886 887 static __devexit int wm831x_boostp_remove(struct platform_device *pdev) 888 { 889 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 890 891 platform_set_drvdata(pdev, NULL); 892 893 free_irq(wm831x_irq(dcdc->wm831x, platform_get_irq_byname(pdev, "UV")), 894 dcdc); 895 regulator_unregister(dcdc->regulator); 896 897 return 0; 898 } 899 900 static struct platform_driver wm831x_boostp_driver = { 901 .probe = wm831x_boostp_probe, 902 .remove = __devexit_p(wm831x_boostp_remove), 903 .driver = { 904 .name = "wm831x-boostp", 905 .owner = THIS_MODULE, 906 }, 907 }; 908 909 /* 910 * External Power Enable 911 * 912 * These aren't actually DCDCs but look like them in hardware so share 913 * code. 914 */ 915 916 #define WM831X_EPE_BASE 6 917 918 static struct regulator_ops wm831x_epe_ops = { 919 .is_enabled = regulator_is_enabled_regmap, 920 .enable = regulator_enable_regmap, 921 .disable = regulator_disable_regmap, 922 .get_status = wm831x_dcdc_get_status, 923 }; 924 925 static __devinit int wm831x_epe_probe(struct platform_device *pdev) 926 { 927 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 928 struct wm831x_pdata *pdata = wm831x->dev->platform_data; 929 struct regulator_config config = { }; 930 int id = pdev->id % ARRAY_SIZE(pdata->epe); 931 struct wm831x_dcdc *dcdc; 932 int ret; 933 934 dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1); 935 936 dcdc = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_dcdc), GFP_KERNEL); 937 if (dcdc == NULL) { 938 dev_err(&pdev->dev, "Unable to allocate private data\n"); 939 return -ENOMEM; 940 } 941 942 dcdc->wm831x = wm831x; 943 944 /* For current parts this is correct; probably need to revisit 945 * in future. 946 */ 947 snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1); 948 dcdc->desc.name = dcdc->name; 949 dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */ 950 dcdc->desc.ops = &wm831x_epe_ops; 951 dcdc->desc.type = REGULATOR_VOLTAGE; 952 dcdc->desc.owner = THIS_MODULE; 953 dcdc->desc.enable_reg = WM831X_DCDC_ENABLE; 954 dcdc->desc.enable_mask = 1 << dcdc->desc.id; 955 956 config.dev = pdev->dev.parent; 957 if (pdata) 958 config.init_data = pdata->epe[id]; 959 config.driver_data = dcdc; 960 config.regmap = wm831x->regmap; 961 962 dcdc->regulator = regulator_register(&dcdc->desc, &config); 963 if (IS_ERR(dcdc->regulator)) { 964 ret = PTR_ERR(dcdc->regulator); 965 dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", 966 id + 1, ret); 967 goto err; 968 } 969 970 platform_set_drvdata(pdev, dcdc); 971 972 return 0; 973 974 err: 975 return ret; 976 } 977 978 static __devexit int wm831x_epe_remove(struct platform_device *pdev) 979 { 980 struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev); 981 982 platform_set_drvdata(pdev, NULL); 983 regulator_unregister(dcdc->regulator); 984 985 return 0; 986 } 987 988 static struct platform_driver wm831x_epe_driver = { 989 .probe = wm831x_epe_probe, 990 .remove = __devexit_p(wm831x_epe_remove), 991 .driver = { 992 .name = "wm831x-epe", 993 .owner = THIS_MODULE, 994 }, 995 }; 996 997 static int __init wm831x_dcdc_init(void) 998 { 999 int ret; 1000 ret = platform_driver_register(&wm831x_buckv_driver); 1001 if (ret != 0) 1002 pr_err("Failed to register WM831x BUCKV driver: %d\n", ret); 1003 1004 ret = platform_driver_register(&wm831x_buckp_driver); 1005 if (ret != 0) 1006 pr_err("Failed to register WM831x BUCKP driver: %d\n", ret); 1007 1008 ret = platform_driver_register(&wm831x_boostp_driver); 1009 if (ret != 0) 1010 pr_err("Failed to register WM831x BOOST driver: %d\n", ret); 1011 1012 ret = platform_driver_register(&wm831x_epe_driver); 1013 if (ret != 0) 1014 pr_err("Failed to register WM831x EPE driver: %d\n", ret); 1015 1016 return 0; 1017 } 1018 subsys_initcall(wm831x_dcdc_init); 1019 1020 static void __exit wm831x_dcdc_exit(void) 1021 { 1022 platform_driver_unregister(&wm831x_epe_driver); 1023 platform_driver_unregister(&wm831x_boostp_driver); 1024 platform_driver_unregister(&wm831x_buckp_driver); 1025 platform_driver_unregister(&wm831x_buckv_driver); 1026 } 1027 module_exit(wm831x_dcdc_exit); 1028 1029 /* Module information */ 1030 MODULE_AUTHOR("Mark Brown"); 1031 MODULE_DESCRIPTION("WM831x DC-DC convertor driver"); 1032 MODULE_LICENSE("GPL"); 1033 MODULE_ALIAS("platform:wm831x-buckv"); 1034 MODULE_ALIAS("platform:wm831x-buckp"); 1035 MODULE_ALIAS("platform:wm831x-epe"); 1036