Mark Brown | d2bedfe | 2009-07-27 14:45:52 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * wm831x-core.c -- Device access for Wolfson WM831x PMICs |
| 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 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/i2c.h> |
| 18 | #include <linux/mfd/core.h> |
| 19 | |
| 20 | #include <linux/mfd/wm831x/core.h> |
| 21 | #include <linux/mfd/wm831x/pdata.h> |
| 22 | |
| 23 | enum wm831x_parent { |
| 24 | WM8310 = 0, |
| 25 | WM8311 = 1, |
| 26 | WM8312 = 2, |
| 27 | }; |
| 28 | |
| 29 | static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg) |
| 30 | { |
| 31 | if (!wm831x->locked) |
| 32 | return 0; |
| 33 | |
| 34 | switch (reg) { |
| 35 | case WM831X_WATCHDOG: |
| 36 | case WM831X_DC4_CONTROL: |
| 37 | case WM831X_ON_PIN_CONTROL: |
| 38 | case WM831X_BACKUP_CHARGER_CONTROL: |
| 39 | case WM831X_CHARGER_CONTROL_1: |
| 40 | case WM831X_CHARGER_CONTROL_2: |
| 41 | return 1; |
| 42 | |
| 43 | default: |
| 44 | return 0; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * wm831x_reg_unlock: Unlock user keyed registers |
| 50 | * |
| 51 | * The WM831x has a user key preventing writes to particularly |
| 52 | * critical registers. This function locks those registers, |
| 53 | * allowing writes to them. |
| 54 | */ |
| 55 | void wm831x_reg_lock(struct wm831x *wm831x) |
| 56 | { |
| 57 | int ret; |
| 58 | |
| 59 | ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0); |
| 60 | if (ret == 0) { |
| 61 | dev_vdbg(wm831x->dev, "Registers locked\n"); |
| 62 | |
| 63 | mutex_lock(&wm831x->io_lock); |
| 64 | WARN_ON(wm831x->locked); |
| 65 | wm831x->locked = 1; |
| 66 | mutex_unlock(&wm831x->io_lock); |
| 67 | } else { |
| 68 | dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret); |
| 69 | } |
| 70 | |
| 71 | } |
| 72 | EXPORT_SYMBOL_GPL(wm831x_reg_lock); |
| 73 | |
| 74 | /** |
| 75 | * wm831x_reg_unlock: Unlock user keyed registers |
| 76 | * |
| 77 | * The WM831x has a user key preventing writes to particularly |
| 78 | * critical registers. This function locks those registers, |
| 79 | * preventing spurious writes. |
| 80 | */ |
| 81 | int wm831x_reg_unlock(struct wm831x *wm831x) |
| 82 | { |
| 83 | int ret; |
| 84 | |
| 85 | /* 0x9716 is the value required to unlock the registers */ |
| 86 | ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716); |
| 87 | if (ret == 0) { |
| 88 | dev_vdbg(wm831x->dev, "Registers unlocked\n"); |
| 89 | |
| 90 | mutex_lock(&wm831x->io_lock); |
| 91 | WARN_ON(!wm831x->locked); |
| 92 | wm831x->locked = 0; |
| 93 | mutex_unlock(&wm831x->io_lock); |
| 94 | } |
| 95 | |
| 96 | return ret; |
| 97 | } |
| 98 | EXPORT_SYMBOL_GPL(wm831x_reg_unlock); |
| 99 | |
| 100 | static int wm831x_read(struct wm831x *wm831x, unsigned short reg, |
| 101 | int bytes, void *dest) |
| 102 | { |
| 103 | int ret, i; |
| 104 | u16 *buf = dest; |
| 105 | |
| 106 | BUG_ON(bytes % 2); |
| 107 | BUG_ON(bytes <= 0); |
| 108 | |
| 109 | ret = wm831x->read_dev(wm831x, reg, bytes, dest); |
| 110 | if (ret < 0) |
| 111 | return ret; |
| 112 | |
| 113 | for (i = 0; i < bytes / 2; i++) { |
| 114 | buf[i] = be16_to_cpu(buf[i]); |
| 115 | |
| 116 | dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n", |
| 117 | buf[i], reg + i, reg + i); |
| 118 | } |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * wm831x_reg_read: Read a single WM831x register. |
| 125 | * |
| 126 | * @wm831x: Device to read from. |
| 127 | * @reg: Register to read. |
| 128 | */ |
| 129 | int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg) |
| 130 | { |
| 131 | unsigned short val; |
| 132 | int ret; |
| 133 | |
| 134 | mutex_lock(&wm831x->io_lock); |
| 135 | |
| 136 | ret = wm831x_read(wm831x, reg, 2, &val); |
| 137 | |
| 138 | mutex_unlock(&wm831x->io_lock); |
| 139 | |
| 140 | if (ret < 0) |
| 141 | return ret; |
| 142 | else |
| 143 | return val; |
| 144 | } |
| 145 | EXPORT_SYMBOL_GPL(wm831x_reg_read); |
| 146 | |
| 147 | /** |
| 148 | * wm831x_bulk_read: Read multiple WM831x registers |
| 149 | * |
| 150 | * @wm831x: Device to read from |
| 151 | * @reg: First register |
| 152 | * @count: Number of registers |
| 153 | * @buf: Buffer to fill. |
| 154 | */ |
| 155 | int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg, |
| 156 | int count, u16 *buf) |
| 157 | { |
| 158 | int ret; |
| 159 | |
| 160 | mutex_lock(&wm831x->io_lock); |
| 161 | |
| 162 | ret = wm831x_read(wm831x, reg, count * 2, buf); |
| 163 | |
| 164 | mutex_unlock(&wm831x->io_lock); |
| 165 | |
| 166 | return ret; |
| 167 | } |
| 168 | EXPORT_SYMBOL_GPL(wm831x_bulk_read); |
| 169 | |
| 170 | static int wm831x_write(struct wm831x *wm831x, unsigned short reg, |
| 171 | int bytes, void *src) |
| 172 | { |
| 173 | u16 *buf = src; |
| 174 | int i; |
| 175 | |
| 176 | BUG_ON(bytes % 2); |
| 177 | BUG_ON(bytes <= 0); |
| 178 | |
| 179 | for (i = 0; i < bytes / 2; i++) { |
| 180 | if (wm831x_reg_locked(wm831x, reg)) |
| 181 | return -EPERM; |
| 182 | |
| 183 | dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n", |
| 184 | buf[i], reg + i, reg + i); |
| 185 | |
| 186 | buf[i] = cpu_to_be16(buf[i]); |
| 187 | } |
| 188 | |
| 189 | return wm831x->write_dev(wm831x, reg, bytes, src); |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * wm831x_reg_write: Write a single WM831x register. |
| 194 | * |
| 195 | * @wm831x: Device to write to. |
| 196 | * @reg: Register to write to. |
| 197 | * @val: Value to write. |
| 198 | */ |
| 199 | int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg, |
| 200 | unsigned short val) |
| 201 | { |
| 202 | int ret; |
| 203 | |
| 204 | mutex_lock(&wm831x->io_lock); |
| 205 | |
| 206 | ret = wm831x_write(wm831x, reg, 2, &val); |
| 207 | |
| 208 | mutex_unlock(&wm831x->io_lock); |
| 209 | |
| 210 | return ret; |
| 211 | } |
| 212 | EXPORT_SYMBOL_GPL(wm831x_reg_write); |
| 213 | |
| 214 | /** |
| 215 | * wm831x_set_bits: Set the value of a bitfield in a WM831x register |
| 216 | * |
| 217 | * @wm831x: Device to write to. |
| 218 | * @reg: Register to write to. |
| 219 | * @mask: Mask of bits to set. |
| 220 | * @val: Value to set (unshifted) |
| 221 | */ |
| 222 | int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg, |
| 223 | unsigned short mask, unsigned short val) |
| 224 | { |
| 225 | int ret; |
| 226 | u16 r; |
| 227 | |
| 228 | mutex_lock(&wm831x->io_lock); |
| 229 | |
| 230 | ret = wm831x_read(wm831x, reg, 2, &r); |
| 231 | if (ret < 0) |
| 232 | goto out; |
| 233 | |
| 234 | r &= ~mask; |
| 235 | r |= val; |
| 236 | |
| 237 | ret = wm831x_write(wm831x, reg, 2, &r); |
| 238 | |
| 239 | out: |
| 240 | mutex_unlock(&wm831x->io_lock); |
| 241 | |
| 242 | return ret; |
| 243 | } |
| 244 | EXPORT_SYMBOL_GPL(wm831x_set_bits); |
| 245 | |
| 246 | static struct resource wm831x_dcdc1_resources[] = { |
| 247 | { |
| 248 | .start = WM831X_DC1_CONTROL_1, |
| 249 | .end = WM831X_DC1_DVS_CONTROL, |
| 250 | .flags = IORESOURCE_IO, |
| 251 | }, |
| 252 | { |
| 253 | .name = "UV", |
| 254 | .start = WM831X_IRQ_UV_DC1, |
| 255 | .end = WM831X_IRQ_UV_DC1, |
| 256 | .flags = IORESOURCE_IRQ, |
| 257 | }, |
| 258 | { |
| 259 | .name = "HC", |
| 260 | .start = WM831X_IRQ_HC_DC1, |
| 261 | .end = WM831X_IRQ_HC_DC1, |
| 262 | .flags = IORESOURCE_IRQ, |
| 263 | }, |
| 264 | }; |
| 265 | |
| 266 | |
| 267 | static struct resource wm831x_dcdc2_resources[] = { |
| 268 | { |
| 269 | .start = WM831X_DC2_CONTROL_1, |
| 270 | .end = WM831X_DC2_DVS_CONTROL, |
| 271 | .flags = IORESOURCE_IO, |
| 272 | }, |
| 273 | { |
| 274 | .name = "UV", |
| 275 | .start = WM831X_IRQ_UV_DC2, |
| 276 | .end = WM831X_IRQ_UV_DC2, |
| 277 | .flags = IORESOURCE_IRQ, |
| 278 | }, |
| 279 | { |
| 280 | .name = "HC", |
| 281 | .start = WM831X_IRQ_HC_DC2, |
| 282 | .end = WM831X_IRQ_HC_DC2, |
| 283 | .flags = IORESOURCE_IRQ, |
| 284 | }, |
| 285 | }; |
| 286 | |
| 287 | static struct resource wm831x_dcdc3_resources[] = { |
| 288 | { |
| 289 | .start = WM831X_DC3_CONTROL_1, |
| 290 | .end = WM831X_DC3_SLEEP_CONTROL, |
| 291 | .flags = IORESOURCE_IO, |
| 292 | }, |
| 293 | { |
| 294 | .name = "UV", |
| 295 | .start = WM831X_IRQ_UV_DC3, |
| 296 | .end = WM831X_IRQ_UV_DC3, |
| 297 | .flags = IORESOURCE_IRQ, |
| 298 | }, |
| 299 | }; |
| 300 | |
| 301 | static struct resource wm831x_dcdc4_resources[] = { |
| 302 | { |
| 303 | .start = WM831X_DC4_CONTROL, |
| 304 | .end = WM831X_DC4_SLEEP_CONTROL, |
| 305 | .flags = IORESOURCE_IO, |
| 306 | }, |
| 307 | { |
| 308 | .name = "UV", |
| 309 | .start = WM831X_IRQ_UV_DC4, |
| 310 | .end = WM831X_IRQ_UV_DC4, |
| 311 | .flags = IORESOURCE_IRQ, |
| 312 | }, |
| 313 | }; |
| 314 | |
| 315 | static struct resource wm831x_gpio_resources[] = { |
| 316 | { |
| 317 | .start = WM831X_IRQ_GPIO_1, |
| 318 | .end = WM831X_IRQ_GPIO_16, |
| 319 | .flags = IORESOURCE_IRQ, |
| 320 | }, |
| 321 | }; |
| 322 | |
| 323 | static struct resource wm831x_isink1_resources[] = { |
| 324 | { |
| 325 | .start = WM831X_CURRENT_SINK_1, |
| 326 | .end = WM831X_CURRENT_SINK_1, |
| 327 | .flags = IORESOURCE_IO, |
| 328 | }, |
| 329 | { |
| 330 | .start = WM831X_IRQ_CS1, |
| 331 | .end = WM831X_IRQ_CS1, |
| 332 | .flags = IORESOURCE_IRQ, |
| 333 | }, |
| 334 | }; |
| 335 | |
| 336 | static struct resource wm831x_isink2_resources[] = { |
| 337 | { |
| 338 | .start = WM831X_CURRENT_SINK_2, |
| 339 | .end = WM831X_CURRENT_SINK_2, |
| 340 | .flags = IORESOURCE_IO, |
| 341 | }, |
| 342 | { |
| 343 | .start = WM831X_IRQ_CS2, |
| 344 | .end = WM831X_IRQ_CS2, |
| 345 | .flags = IORESOURCE_IRQ, |
| 346 | }, |
| 347 | }; |
| 348 | |
| 349 | static struct resource wm831x_ldo1_resources[] = { |
| 350 | { |
| 351 | .start = WM831X_LDO1_CONTROL, |
| 352 | .end = WM831X_LDO1_SLEEP_CONTROL, |
| 353 | .flags = IORESOURCE_IO, |
| 354 | }, |
| 355 | { |
| 356 | .name = "UV", |
| 357 | .start = WM831X_IRQ_UV_LDO1, |
| 358 | .end = WM831X_IRQ_UV_LDO1, |
| 359 | .flags = IORESOURCE_IRQ, |
| 360 | }, |
| 361 | }; |
| 362 | |
| 363 | static struct resource wm831x_ldo2_resources[] = { |
| 364 | { |
| 365 | .start = WM831X_LDO2_CONTROL, |
| 366 | .end = WM831X_LDO2_SLEEP_CONTROL, |
| 367 | .flags = IORESOURCE_IO, |
| 368 | }, |
| 369 | { |
| 370 | .name = "UV", |
| 371 | .start = WM831X_IRQ_UV_LDO2, |
| 372 | .end = WM831X_IRQ_UV_LDO2, |
| 373 | .flags = IORESOURCE_IRQ, |
| 374 | }, |
| 375 | }; |
| 376 | |
| 377 | static struct resource wm831x_ldo3_resources[] = { |
| 378 | { |
| 379 | .start = WM831X_LDO3_CONTROL, |
| 380 | .end = WM831X_LDO3_SLEEP_CONTROL, |
| 381 | .flags = IORESOURCE_IO, |
| 382 | }, |
| 383 | { |
| 384 | .name = "UV", |
| 385 | .start = WM831X_IRQ_UV_LDO3, |
| 386 | .end = WM831X_IRQ_UV_LDO3, |
| 387 | .flags = IORESOURCE_IRQ, |
| 388 | }, |
| 389 | }; |
| 390 | |
| 391 | static struct resource wm831x_ldo4_resources[] = { |
| 392 | { |
| 393 | .start = WM831X_LDO4_CONTROL, |
| 394 | .end = WM831X_LDO4_SLEEP_CONTROL, |
| 395 | .flags = IORESOURCE_IO, |
| 396 | }, |
| 397 | { |
| 398 | .name = "UV", |
| 399 | .start = WM831X_IRQ_UV_LDO4, |
| 400 | .end = WM831X_IRQ_UV_LDO4, |
| 401 | .flags = IORESOURCE_IRQ, |
| 402 | }, |
| 403 | }; |
| 404 | |
| 405 | static struct resource wm831x_ldo5_resources[] = { |
| 406 | { |
| 407 | .start = WM831X_LDO5_CONTROL, |
| 408 | .end = WM831X_LDO5_SLEEP_CONTROL, |
| 409 | .flags = IORESOURCE_IO, |
| 410 | }, |
| 411 | { |
| 412 | .name = "UV", |
| 413 | .start = WM831X_IRQ_UV_LDO5, |
| 414 | .end = WM831X_IRQ_UV_LDO5, |
| 415 | .flags = IORESOURCE_IRQ, |
| 416 | }, |
| 417 | }; |
| 418 | |
| 419 | static struct resource wm831x_ldo6_resources[] = { |
| 420 | { |
| 421 | .start = WM831X_LDO6_CONTROL, |
| 422 | .end = WM831X_LDO6_SLEEP_CONTROL, |
| 423 | .flags = IORESOURCE_IO, |
| 424 | }, |
| 425 | { |
| 426 | .name = "UV", |
| 427 | .start = WM831X_IRQ_UV_LDO6, |
| 428 | .end = WM831X_IRQ_UV_LDO6, |
| 429 | .flags = IORESOURCE_IRQ, |
| 430 | }, |
| 431 | }; |
| 432 | |
| 433 | static struct resource wm831x_ldo7_resources[] = { |
| 434 | { |
| 435 | .start = WM831X_LDO7_CONTROL, |
| 436 | .end = WM831X_LDO7_SLEEP_CONTROL, |
| 437 | .flags = IORESOURCE_IO, |
| 438 | }, |
| 439 | { |
| 440 | .name = "UV", |
| 441 | .start = WM831X_IRQ_UV_LDO7, |
| 442 | .end = WM831X_IRQ_UV_LDO7, |
| 443 | .flags = IORESOURCE_IRQ, |
| 444 | }, |
| 445 | }; |
| 446 | |
| 447 | static struct resource wm831x_ldo8_resources[] = { |
| 448 | { |
| 449 | .start = WM831X_LDO8_CONTROL, |
| 450 | .end = WM831X_LDO8_SLEEP_CONTROL, |
| 451 | .flags = IORESOURCE_IO, |
| 452 | }, |
| 453 | { |
| 454 | .name = "UV", |
| 455 | .start = WM831X_IRQ_UV_LDO8, |
| 456 | .end = WM831X_IRQ_UV_LDO8, |
| 457 | .flags = IORESOURCE_IRQ, |
| 458 | }, |
| 459 | }; |
| 460 | |
| 461 | static struct resource wm831x_ldo9_resources[] = { |
| 462 | { |
| 463 | .start = WM831X_LDO9_CONTROL, |
| 464 | .end = WM831X_LDO9_SLEEP_CONTROL, |
| 465 | .flags = IORESOURCE_IO, |
| 466 | }, |
| 467 | { |
| 468 | .name = "UV", |
| 469 | .start = WM831X_IRQ_UV_LDO9, |
| 470 | .end = WM831X_IRQ_UV_LDO9, |
| 471 | .flags = IORESOURCE_IRQ, |
| 472 | }, |
| 473 | }; |
| 474 | |
| 475 | static struct resource wm831x_ldo10_resources[] = { |
| 476 | { |
| 477 | .start = WM831X_LDO10_CONTROL, |
| 478 | .end = WM831X_LDO10_SLEEP_CONTROL, |
| 479 | .flags = IORESOURCE_IO, |
| 480 | }, |
| 481 | { |
| 482 | .name = "UV", |
| 483 | .start = WM831X_IRQ_UV_LDO10, |
| 484 | .end = WM831X_IRQ_UV_LDO10, |
| 485 | .flags = IORESOURCE_IRQ, |
| 486 | }, |
| 487 | }; |
| 488 | |
| 489 | static struct resource wm831x_ldo11_resources[] = { |
| 490 | { |
| 491 | .start = WM831X_LDO11_ON_CONTROL, |
| 492 | .end = WM831X_LDO11_SLEEP_CONTROL, |
| 493 | .flags = IORESOURCE_IO, |
| 494 | }, |
| 495 | }; |
| 496 | |
| 497 | static struct resource wm831x_on_resources[] = { |
| 498 | { |
| 499 | .start = WM831X_IRQ_ON, |
| 500 | .end = WM831X_IRQ_ON, |
| 501 | .flags = IORESOURCE_IRQ, |
| 502 | }, |
| 503 | }; |
| 504 | |
| 505 | |
| 506 | static struct resource wm831x_power_resources[] = { |
| 507 | { |
| 508 | .name = "SYSLO", |
| 509 | .start = WM831X_IRQ_PPM_SYSLO, |
| 510 | .end = WM831X_IRQ_PPM_SYSLO, |
| 511 | .flags = IORESOURCE_IRQ, |
| 512 | }, |
| 513 | { |
| 514 | .name = "PWR SRC", |
| 515 | .start = WM831X_IRQ_PPM_PWR_SRC, |
| 516 | .end = WM831X_IRQ_PPM_PWR_SRC, |
| 517 | .flags = IORESOURCE_IRQ, |
| 518 | }, |
| 519 | { |
| 520 | .name = "USB CURR", |
| 521 | .start = WM831X_IRQ_PPM_USB_CURR, |
| 522 | .end = WM831X_IRQ_PPM_USB_CURR, |
| 523 | .flags = IORESOURCE_IRQ, |
| 524 | }, |
| 525 | { |
| 526 | .name = "BATT HOT", |
| 527 | .start = WM831X_IRQ_CHG_BATT_HOT, |
| 528 | .end = WM831X_IRQ_CHG_BATT_HOT, |
| 529 | .flags = IORESOURCE_IRQ, |
| 530 | }, |
| 531 | { |
| 532 | .name = "BATT COLD", |
| 533 | .start = WM831X_IRQ_CHG_BATT_COLD, |
| 534 | .end = WM831X_IRQ_CHG_BATT_COLD, |
| 535 | .flags = IORESOURCE_IRQ, |
| 536 | }, |
| 537 | { |
| 538 | .name = "BATT FAIL", |
| 539 | .start = WM831X_IRQ_CHG_BATT_FAIL, |
| 540 | .end = WM831X_IRQ_CHG_BATT_FAIL, |
| 541 | .flags = IORESOURCE_IRQ, |
| 542 | }, |
| 543 | { |
| 544 | .name = "OV", |
| 545 | .start = WM831X_IRQ_CHG_OV, |
| 546 | .end = WM831X_IRQ_CHG_OV, |
| 547 | .flags = IORESOURCE_IRQ, |
| 548 | }, |
| 549 | { |
| 550 | .name = "END", |
| 551 | .start = WM831X_IRQ_CHG_END, |
| 552 | .end = WM831X_IRQ_CHG_END, |
| 553 | .flags = IORESOURCE_IRQ, |
| 554 | }, |
| 555 | { |
| 556 | .name = "TO", |
| 557 | .start = WM831X_IRQ_CHG_TO, |
| 558 | .end = WM831X_IRQ_CHG_TO, |
| 559 | .flags = IORESOURCE_IRQ, |
| 560 | }, |
| 561 | { |
| 562 | .name = "MODE", |
| 563 | .start = WM831X_IRQ_CHG_MODE, |
| 564 | .end = WM831X_IRQ_CHG_MODE, |
| 565 | .flags = IORESOURCE_IRQ, |
| 566 | }, |
| 567 | { |
| 568 | .name = "START", |
| 569 | .start = WM831X_IRQ_CHG_START, |
| 570 | .end = WM831X_IRQ_CHG_START, |
| 571 | .flags = IORESOURCE_IRQ, |
| 572 | }, |
| 573 | }; |
| 574 | |
| 575 | static struct resource wm831x_rtc_resources[] = { |
| 576 | { |
| 577 | .name = "PER", |
| 578 | .start = WM831X_IRQ_RTC_PER, |
| 579 | .end = WM831X_IRQ_RTC_PER, |
| 580 | .flags = IORESOURCE_IRQ, |
| 581 | }, |
| 582 | { |
| 583 | .name = "ALM", |
| 584 | .start = WM831X_IRQ_RTC_ALM, |
| 585 | .end = WM831X_IRQ_RTC_ALM, |
| 586 | .flags = IORESOURCE_IRQ, |
| 587 | }, |
| 588 | }; |
| 589 | |
| 590 | static struct resource wm831x_status1_resources[] = { |
| 591 | { |
| 592 | .start = WM831X_STATUS_LED_1, |
| 593 | .end = WM831X_STATUS_LED_1, |
| 594 | .flags = IORESOURCE_IO, |
| 595 | }, |
| 596 | }; |
| 597 | |
| 598 | static struct resource wm831x_status2_resources[] = { |
| 599 | { |
| 600 | .start = WM831X_STATUS_LED_2, |
| 601 | .end = WM831X_STATUS_LED_2, |
| 602 | .flags = IORESOURCE_IO, |
| 603 | }, |
| 604 | }; |
| 605 | |
| 606 | static struct resource wm831x_touch_resources[] = { |
| 607 | { |
| 608 | .name = "TCHPD", |
| 609 | .start = WM831X_IRQ_TCHPD, |
| 610 | .end = WM831X_IRQ_TCHPD, |
| 611 | .flags = IORESOURCE_IRQ, |
| 612 | }, |
| 613 | { |
| 614 | .name = "TCHDATA", |
| 615 | .start = WM831X_IRQ_TCHDATA, |
| 616 | .end = WM831X_IRQ_TCHDATA, |
| 617 | .flags = IORESOURCE_IRQ, |
| 618 | }, |
| 619 | }; |
| 620 | |
| 621 | static struct resource wm831x_wdt_resources[] = { |
| 622 | { |
| 623 | .start = WM831X_IRQ_WDOG_TO, |
| 624 | .end = WM831X_IRQ_WDOG_TO, |
| 625 | .flags = IORESOURCE_IRQ, |
| 626 | }, |
| 627 | }; |
| 628 | |
| 629 | static struct mfd_cell wm8310_devs[] = { |
| 630 | { |
| 631 | .name = "wm831x-buckv", |
| 632 | .id = 1, |
| 633 | .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources), |
| 634 | .resources = wm831x_dcdc1_resources, |
| 635 | }, |
| 636 | { |
| 637 | .name = "wm831x-buckv", |
| 638 | .id = 2, |
| 639 | .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources), |
| 640 | .resources = wm831x_dcdc2_resources, |
| 641 | }, |
| 642 | { |
| 643 | .name = "wm831x-buckp", |
| 644 | .id = 3, |
| 645 | .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources), |
| 646 | .resources = wm831x_dcdc3_resources, |
| 647 | }, |
| 648 | { |
| 649 | .name = "wm831x-boostp", |
| 650 | .id = 4, |
| 651 | .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources), |
| 652 | .resources = wm831x_dcdc4_resources, |
| 653 | }, |
| 654 | { |
| 655 | .name = "wm831x-epe", |
| 656 | .id = 1, |
| 657 | }, |
| 658 | { |
| 659 | .name = "wm831x-epe", |
| 660 | .id = 2, |
| 661 | }, |
| 662 | { |
| 663 | .name = "wm831x-gpio", |
| 664 | .num_resources = ARRAY_SIZE(wm831x_gpio_resources), |
| 665 | .resources = wm831x_gpio_resources, |
| 666 | }, |
| 667 | { |
| 668 | .name = "wm831x-hwmon", |
| 669 | }, |
| 670 | { |
| 671 | .name = "wm831x-isink", |
| 672 | .id = 1, |
| 673 | .num_resources = ARRAY_SIZE(wm831x_isink1_resources), |
| 674 | .resources = wm831x_isink1_resources, |
| 675 | }, |
| 676 | { |
| 677 | .name = "wm831x-isink", |
| 678 | .id = 2, |
| 679 | .num_resources = ARRAY_SIZE(wm831x_isink2_resources), |
| 680 | .resources = wm831x_isink2_resources, |
| 681 | }, |
| 682 | { |
| 683 | .name = "wm831x-ldo", |
| 684 | .id = 1, |
| 685 | .num_resources = ARRAY_SIZE(wm831x_ldo1_resources), |
| 686 | .resources = wm831x_ldo1_resources, |
| 687 | }, |
| 688 | { |
| 689 | .name = "wm831x-ldo", |
| 690 | .id = 2, |
| 691 | .num_resources = ARRAY_SIZE(wm831x_ldo2_resources), |
| 692 | .resources = wm831x_ldo2_resources, |
| 693 | }, |
| 694 | { |
| 695 | .name = "wm831x-ldo", |
| 696 | .id = 3, |
| 697 | .num_resources = ARRAY_SIZE(wm831x_ldo3_resources), |
| 698 | .resources = wm831x_ldo3_resources, |
| 699 | }, |
| 700 | { |
| 701 | .name = "wm831x-ldo", |
| 702 | .id = 4, |
| 703 | .num_resources = ARRAY_SIZE(wm831x_ldo4_resources), |
| 704 | .resources = wm831x_ldo4_resources, |
| 705 | }, |
| 706 | { |
| 707 | .name = "wm831x-ldo", |
| 708 | .id = 5, |
| 709 | .num_resources = ARRAY_SIZE(wm831x_ldo5_resources), |
| 710 | .resources = wm831x_ldo5_resources, |
| 711 | }, |
| 712 | { |
| 713 | .name = "wm831x-ldo", |
| 714 | .id = 6, |
| 715 | .num_resources = ARRAY_SIZE(wm831x_ldo6_resources), |
| 716 | .resources = wm831x_ldo6_resources, |
| 717 | }, |
| 718 | { |
| 719 | .name = "wm831x-aldo", |
| 720 | .id = 7, |
| 721 | .num_resources = ARRAY_SIZE(wm831x_ldo7_resources), |
| 722 | .resources = wm831x_ldo7_resources, |
| 723 | }, |
| 724 | { |
| 725 | .name = "wm831x-aldo", |
| 726 | .id = 8, |
| 727 | .num_resources = ARRAY_SIZE(wm831x_ldo8_resources), |
| 728 | .resources = wm831x_ldo8_resources, |
| 729 | }, |
| 730 | { |
| 731 | .name = "wm831x-aldo", |
| 732 | .id = 9, |
| 733 | .num_resources = ARRAY_SIZE(wm831x_ldo9_resources), |
| 734 | .resources = wm831x_ldo9_resources, |
| 735 | }, |
| 736 | { |
| 737 | .name = "wm831x-aldo", |
| 738 | .id = 10, |
| 739 | .num_resources = ARRAY_SIZE(wm831x_ldo10_resources), |
| 740 | .resources = wm831x_ldo10_resources, |
| 741 | }, |
| 742 | { |
| 743 | .name = "wm831x-alive-ldo", |
| 744 | .id = 11, |
| 745 | .num_resources = ARRAY_SIZE(wm831x_ldo11_resources), |
| 746 | .resources = wm831x_ldo11_resources, |
| 747 | }, |
| 748 | { |
| 749 | .name = "wm831x-on", |
| 750 | .num_resources = ARRAY_SIZE(wm831x_on_resources), |
| 751 | .resources = wm831x_on_resources, |
| 752 | }, |
| 753 | { |
| 754 | .name = "wm831x-power", |
| 755 | .num_resources = ARRAY_SIZE(wm831x_power_resources), |
| 756 | .resources = wm831x_power_resources, |
| 757 | }, |
| 758 | { |
| 759 | .name = "wm831x-rtc", |
| 760 | .num_resources = ARRAY_SIZE(wm831x_rtc_resources), |
| 761 | .resources = wm831x_rtc_resources, |
| 762 | }, |
| 763 | { |
| 764 | .name = "wm831x-status", |
| 765 | .id = 1, |
| 766 | .num_resources = ARRAY_SIZE(wm831x_status1_resources), |
| 767 | .resources = wm831x_status1_resources, |
| 768 | }, |
| 769 | { |
| 770 | .name = "wm831x-status", |
| 771 | .id = 2, |
| 772 | .num_resources = ARRAY_SIZE(wm831x_status2_resources), |
| 773 | .resources = wm831x_status2_resources, |
| 774 | }, |
| 775 | { |
| 776 | .name = "wm831x-watchdog", |
| 777 | .num_resources = ARRAY_SIZE(wm831x_wdt_resources), |
| 778 | .resources = wm831x_wdt_resources, |
| 779 | }, |
| 780 | }; |
| 781 | |
| 782 | static struct mfd_cell wm8311_devs[] = { |
| 783 | { |
| 784 | .name = "wm831x-buckv", |
| 785 | .id = 1, |
| 786 | .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources), |
| 787 | .resources = wm831x_dcdc1_resources, |
| 788 | }, |
| 789 | { |
| 790 | .name = "wm831x-buckv", |
| 791 | .id = 2, |
| 792 | .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources), |
| 793 | .resources = wm831x_dcdc2_resources, |
| 794 | }, |
| 795 | { |
| 796 | .name = "wm831x-buckp", |
| 797 | .id = 3, |
| 798 | .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources), |
| 799 | .resources = wm831x_dcdc3_resources, |
| 800 | }, |
| 801 | { |
| 802 | .name = "wm831x-boostp", |
| 803 | .id = 4, |
| 804 | .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources), |
| 805 | .resources = wm831x_dcdc4_resources, |
| 806 | }, |
| 807 | { |
| 808 | .name = "wm831x-epe", |
| 809 | .id = 1, |
| 810 | }, |
| 811 | { |
| 812 | .name = "wm831x-epe", |
| 813 | .id = 2, |
| 814 | }, |
| 815 | { |
| 816 | .name = "wm831x-gpio", |
| 817 | .num_resources = ARRAY_SIZE(wm831x_gpio_resources), |
| 818 | .resources = wm831x_gpio_resources, |
| 819 | }, |
| 820 | { |
| 821 | .name = "wm831x-hwmon", |
| 822 | }, |
| 823 | { |
| 824 | .name = "wm831x-isink", |
| 825 | .id = 1, |
| 826 | .num_resources = ARRAY_SIZE(wm831x_isink1_resources), |
| 827 | .resources = wm831x_isink1_resources, |
| 828 | }, |
| 829 | { |
| 830 | .name = "wm831x-isink", |
| 831 | .id = 2, |
| 832 | .num_resources = ARRAY_SIZE(wm831x_isink2_resources), |
| 833 | .resources = wm831x_isink2_resources, |
| 834 | }, |
| 835 | { |
| 836 | .name = "wm831x-ldo", |
| 837 | .id = 1, |
| 838 | .num_resources = ARRAY_SIZE(wm831x_ldo1_resources), |
| 839 | .resources = wm831x_ldo1_resources, |
| 840 | }, |
| 841 | { |
| 842 | .name = "wm831x-ldo", |
| 843 | .id = 2, |
| 844 | .num_resources = ARRAY_SIZE(wm831x_ldo2_resources), |
| 845 | .resources = wm831x_ldo2_resources, |
| 846 | }, |
| 847 | { |
| 848 | .name = "wm831x-ldo", |
| 849 | .id = 3, |
| 850 | .num_resources = ARRAY_SIZE(wm831x_ldo3_resources), |
| 851 | .resources = wm831x_ldo3_resources, |
| 852 | }, |
| 853 | { |
| 854 | .name = "wm831x-ldo", |
| 855 | .id = 4, |
| 856 | .num_resources = ARRAY_SIZE(wm831x_ldo4_resources), |
| 857 | .resources = wm831x_ldo4_resources, |
| 858 | }, |
| 859 | { |
| 860 | .name = "wm831x-ldo", |
| 861 | .id = 5, |
| 862 | .num_resources = ARRAY_SIZE(wm831x_ldo5_resources), |
| 863 | .resources = wm831x_ldo5_resources, |
| 864 | }, |
| 865 | { |
| 866 | .name = "wm831x-aldo", |
| 867 | .id = 7, |
| 868 | .num_resources = ARRAY_SIZE(wm831x_ldo7_resources), |
| 869 | .resources = wm831x_ldo7_resources, |
| 870 | }, |
| 871 | { |
| 872 | .name = "wm831x-alive-ldo", |
| 873 | .id = 11, |
| 874 | .num_resources = ARRAY_SIZE(wm831x_ldo11_resources), |
| 875 | .resources = wm831x_ldo11_resources, |
| 876 | }, |
| 877 | { |
| 878 | .name = "wm831x-on", |
| 879 | .num_resources = ARRAY_SIZE(wm831x_on_resources), |
| 880 | .resources = wm831x_on_resources, |
| 881 | }, |
| 882 | { |
| 883 | .name = "wm831x-power", |
| 884 | .num_resources = ARRAY_SIZE(wm831x_power_resources), |
| 885 | .resources = wm831x_power_resources, |
| 886 | }, |
| 887 | { |
| 888 | .name = "wm831x-rtc", |
| 889 | .num_resources = ARRAY_SIZE(wm831x_rtc_resources), |
| 890 | .resources = wm831x_rtc_resources, |
| 891 | }, |
| 892 | { |
| 893 | .name = "wm831x-status", |
| 894 | .id = 1, |
| 895 | .num_resources = ARRAY_SIZE(wm831x_status1_resources), |
| 896 | .resources = wm831x_status1_resources, |
| 897 | }, |
| 898 | { |
| 899 | .name = "wm831x-status", |
| 900 | .id = 2, |
| 901 | .num_resources = ARRAY_SIZE(wm831x_status2_resources), |
| 902 | .resources = wm831x_status2_resources, |
| 903 | }, |
| 904 | { |
| 905 | .name = "wm831x-touch", |
| 906 | .num_resources = ARRAY_SIZE(wm831x_touch_resources), |
| 907 | .resources = wm831x_touch_resources, |
| 908 | }, |
| 909 | { |
| 910 | .name = "wm831x-watchdog", |
| 911 | .num_resources = ARRAY_SIZE(wm831x_wdt_resources), |
| 912 | .resources = wm831x_wdt_resources, |
| 913 | }, |
| 914 | }; |
| 915 | |
| 916 | static struct mfd_cell wm8312_devs[] = { |
| 917 | { |
| 918 | .name = "wm831x-buckv", |
| 919 | .id = 1, |
| 920 | .num_resources = ARRAY_SIZE(wm831x_dcdc1_resources), |
| 921 | .resources = wm831x_dcdc1_resources, |
| 922 | }, |
| 923 | { |
| 924 | .name = "wm831x-buckv", |
| 925 | .id = 2, |
| 926 | .num_resources = ARRAY_SIZE(wm831x_dcdc2_resources), |
| 927 | .resources = wm831x_dcdc2_resources, |
| 928 | }, |
| 929 | { |
| 930 | .name = "wm831x-buckp", |
| 931 | .id = 3, |
| 932 | .num_resources = ARRAY_SIZE(wm831x_dcdc3_resources), |
| 933 | .resources = wm831x_dcdc3_resources, |
| 934 | }, |
| 935 | { |
| 936 | .name = "wm831x-boostp", |
| 937 | .id = 4, |
| 938 | .num_resources = ARRAY_SIZE(wm831x_dcdc4_resources), |
| 939 | .resources = wm831x_dcdc4_resources, |
| 940 | }, |
| 941 | { |
| 942 | .name = "wm831x-epe", |
| 943 | .id = 1, |
| 944 | }, |
| 945 | { |
| 946 | .name = "wm831x-epe", |
| 947 | .id = 2, |
| 948 | }, |
| 949 | { |
| 950 | .name = "wm831x-gpio", |
| 951 | .num_resources = ARRAY_SIZE(wm831x_gpio_resources), |
| 952 | .resources = wm831x_gpio_resources, |
| 953 | }, |
| 954 | { |
| 955 | .name = "wm831x-hwmon", |
| 956 | }, |
| 957 | { |
| 958 | .name = "wm831x-isink", |
| 959 | .id = 1, |
| 960 | .num_resources = ARRAY_SIZE(wm831x_isink1_resources), |
| 961 | .resources = wm831x_isink1_resources, |
| 962 | }, |
| 963 | { |
| 964 | .name = "wm831x-isink", |
| 965 | .id = 2, |
| 966 | .num_resources = ARRAY_SIZE(wm831x_isink2_resources), |
| 967 | .resources = wm831x_isink2_resources, |
| 968 | }, |
| 969 | { |
| 970 | .name = "wm831x-ldo", |
| 971 | .id = 1, |
| 972 | .num_resources = ARRAY_SIZE(wm831x_ldo1_resources), |
| 973 | .resources = wm831x_ldo1_resources, |
| 974 | }, |
| 975 | { |
| 976 | .name = "wm831x-ldo", |
| 977 | .id = 2, |
| 978 | .num_resources = ARRAY_SIZE(wm831x_ldo2_resources), |
| 979 | .resources = wm831x_ldo2_resources, |
| 980 | }, |
| 981 | { |
| 982 | .name = "wm831x-ldo", |
| 983 | .id = 3, |
| 984 | .num_resources = ARRAY_SIZE(wm831x_ldo3_resources), |
| 985 | .resources = wm831x_ldo3_resources, |
| 986 | }, |
| 987 | { |
| 988 | .name = "wm831x-ldo", |
| 989 | .id = 4, |
| 990 | .num_resources = ARRAY_SIZE(wm831x_ldo4_resources), |
| 991 | .resources = wm831x_ldo4_resources, |
| 992 | }, |
| 993 | { |
| 994 | .name = "wm831x-ldo", |
| 995 | .id = 5, |
| 996 | .num_resources = ARRAY_SIZE(wm831x_ldo5_resources), |
| 997 | .resources = wm831x_ldo5_resources, |
| 998 | }, |
| 999 | { |
| 1000 | .name = "wm831x-ldo", |
| 1001 | .id = 6, |
| 1002 | .num_resources = ARRAY_SIZE(wm831x_ldo6_resources), |
| 1003 | .resources = wm831x_ldo6_resources, |
| 1004 | }, |
| 1005 | { |
| 1006 | .name = "wm831x-aldo", |
| 1007 | .id = 7, |
| 1008 | .num_resources = ARRAY_SIZE(wm831x_ldo7_resources), |
| 1009 | .resources = wm831x_ldo7_resources, |
| 1010 | }, |
| 1011 | { |
| 1012 | .name = "wm831x-aldo", |
| 1013 | .id = 8, |
| 1014 | .num_resources = ARRAY_SIZE(wm831x_ldo8_resources), |
| 1015 | .resources = wm831x_ldo8_resources, |
| 1016 | }, |
| 1017 | { |
| 1018 | .name = "wm831x-aldo", |
| 1019 | .id = 9, |
| 1020 | .num_resources = ARRAY_SIZE(wm831x_ldo9_resources), |
| 1021 | .resources = wm831x_ldo9_resources, |
| 1022 | }, |
| 1023 | { |
| 1024 | .name = "wm831x-aldo", |
| 1025 | .id = 10, |
| 1026 | .num_resources = ARRAY_SIZE(wm831x_ldo10_resources), |
| 1027 | .resources = wm831x_ldo10_resources, |
| 1028 | }, |
| 1029 | { |
| 1030 | .name = "wm831x-alive-ldo", |
| 1031 | .id = 11, |
| 1032 | .num_resources = ARRAY_SIZE(wm831x_ldo11_resources), |
| 1033 | .resources = wm831x_ldo11_resources, |
| 1034 | }, |
| 1035 | { |
| 1036 | .name = "wm831x-on", |
| 1037 | .num_resources = ARRAY_SIZE(wm831x_on_resources), |
| 1038 | .resources = wm831x_on_resources, |
| 1039 | }, |
| 1040 | { |
| 1041 | .name = "wm831x-power", |
| 1042 | .num_resources = ARRAY_SIZE(wm831x_power_resources), |
| 1043 | .resources = wm831x_power_resources, |
| 1044 | }, |
| 1045 | { |
| 1046 | .name = "wm831x-rtc", |
| 1047 | .num_resources = ARRAY_SIZE(wm831x_rtc_resources), |
| 1048 | .resources = wm831x_rtc_resources, |
| 1049 | }, |
| 1050 | { |
| 1051 | .name = "wm831x-status", |
| 1052 | .id = 1, |
| 1053 | .num_resources = ARRAY_SIZE(wm831x_status1_resources), |
| 1054 | .resources = wm831x_status1_resources, |
| 1055 | }, |
| 1056 | { |
| 1057 | .name = "wm831x-status", |
| 1058 | .id = 2, |
| 1059 | .num_resources = ARRAY_SIZE(wm831x_status2_resources), |
| 1060 | .resources = wm831x_status2_resources, |
| 1061 | }, |
| 1062 | { |
| 1063 | .name = "wm831x-touch", |
| 1064 | .num_resources = ARRAY_SIZE(wm831x_touch_resources), |
| 1065 | .resources = wm831x_touch_resources, |
| 1066 | }, |
| 1067 | { |
| 1068 | .name = "wm831x-watchdog", |
| 1069 | .num_resources = ARRAY_SIZE(wm831x_wdt_resources), |
| 1070 | .resources = wm831x_wdt_resources, |
| 1071 | }, |
| 1072 | }; |
| 1073 | |
| 1074 | /* |
| 1075 | * Instantiate the generic non-control parts of the device. |
| 1076 | */ |
| 1077 | static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) |
| 1078 | { |
| 1079 | struct wm831x_pdata *pdata = wm831x->dev->platform_data; |
| 1080 | int rev; |
| 1081 | enum wm831x_parent parent; |
| 1082 | int ret; |
| 1083 | |
| 1084 | mutex_init(&wm831x->io_lock); |
| 1085 | mutex_init(&wm831x->key_lock); |
| 1086 | dev_set_drvdata(wm831x->dev, wm831x); |
| 1087 | |
| 1088 | ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID); |
| 1089 | if (ret < 0) { |
| 1090 | dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret); |
| 1091 | goto err; |
| 1092 | } |
| 1093 | if (ret != 0x6204) { |
| 1094 | dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret); |
| 1095 | ret = -EINVAL; |
| 1096 | goto err; |
| 1097 | } |
| 1098 | |
| 1099 | ret = wm831x_reg_read(wm831x, WM831X_REVISION); |
| 1100 | if (ret < 0) { |
| 1101 | dev_err(wm831x->dev, "Failed to read revision: %d\n", ret); |
| 1102 | goto err; |
| 1103 | } |
| 1104 | rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT; |
| 1105 | |
| 1106 | ret = wm831x_reg_read(wm831x, WM831X_RESET_ID); |
| 1107 | if (ret < 0) { |
| 1108 | dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret); |
| 1109 | goto err; |
| 1110 | } |
| 1111 | |
| 1112 | switch (ret) { |
| 1113 | case 0x8310: |
| 1114 | parent = WM8310; |
| 1115 | switch (rev) { |
| 1116 | case 0: |
| 1117 | dev_info(wm831x->dev, "WM8310 revision %c\n", |
| 1118 | 'A' + rev); |
| 1119 | break; |
| 1120 | } |
| 1121 | break; |
| 1122 | |
| 1123 | case 0x8311: |
| 1124 | parent = WM8311; |
| 1125 | switch (rev) { |
| 1126 | case 0: |
| 1127 | dev_info(wm831x->dev, "WM8311 revision %c\n", |
| 1128 | 'A' + rev); |
| 1129 | break; |
| 1130 | } |
| 1131 | break; |
| 1132 | |
| 1133 | case 0x8312: |
| 1134 | parent = WM8312; |
| 1135 | switch (rev) { |
| 1136 | case 0: |
| 1137 | dev_info(wm831x->dev, "WM8312 revision %c\n", |
| 1138 | 'A' + rev); |
| 1139 | break; |
| 1140 | } |
| 1141 | break; |
| 1142 | |
| 1143 | case 0: |
| 1144 | /* Some engineering samples do not have the ID set, |
| 1145 | * rely on the device being registered correctly. |
| 1146 | * This will need revisiting for future devices with |
| 1147 | * multiple dies. |
| 1148 | */ |
| 1149 | parent = id; |
| 1150 | switch (rev) { |
| 1151 | case 0: |
| 1152 | dev_info(wm831x->dev, "WM831%d ES revision %c\n", |
| 1153 | parent, 'A' + rev); |
| 1154 | break; |
| 1155 | } |
| 1156 | break; |
| 1157 | |
| 1158 | default: |
| 1159 | dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret); |
| 1160 | ret = -EINVAL; |
| 1161 | goto err; |
| 1162 | } |
| 1163 | |
| 1164 | /* This will need revisiting in future but is OK for all |
| 1165 | * current parts. |
| 1166 | */ |
| 1167 | if (parent != id) |
| 1168 | dev_warn(wm831x->dev, "Device was registered as a WM831%lu\n", |
| 1169 | id); |
| 1170 | |
| 1171 | /* Bootstrap the user key */ |
| 1172 | ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY); |
| 1173 | if (ret < 0) { |
| 1174 | dev_err(wm831x->dev, "Failed to read security key: %d\n", ret); |
| 1175 | goto err; |
| 1176 | } |
| 1177 | if (ret != 0) { |
| 1178 | dev_warn(wm831x->dev, "Security key had non-zero value %x\n", |
| 1179 | ret); |
| 1180 | wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0); |
| 1181 | } |
| 1182 | wm831x->locked = 1; |
| 1183 | |
| 1184 | if (pdata && pdata->pre_init) { |
| 1185 | ret = pdata->pre_init(wm831x); |
| 1186 | if (ret != 0) { |
| 1187 | dev_err(wm831x->dev, "pre_init() failed: %d\n", ret); |
| 1188 | goto err; |
| 1189 | } |
| 1190 | } |
| 1191 | |
| 1192 | /* The core device is up, instantiate the subdevices. */ |
| 1193 | switch (parent) { |
| 1194 | case WM8310: |
| 1195 | ret = mfd_add_devices(wm831x->dev, -1, |
| 1196 | wm8310_devs, ARRAY_SIZE(wm8310_devs), |
| 1197 | NULL, 0); |
| 1198 | break; |
| 1199 | |
| 1200 | case WM8311: |
| 1201 | ret = mfd_add_devices(wm831x->dev, -1, |
| 1202 | wm8311_devs, ARRAY_SIZE(wm8311_devs), |
| 1203 | NULL, 0); |
| 1204 | break; |
| 1205 | |
| 1206 | case WM8312: |
| 1207 | ret = mfd_add_devices(wm831x->dev, -1, |
| 1208 | wm8312_devs, ARRAY_SIZE(wm8312_devs), |
| 1209 | NULL, 0); |
| 1210 | break; |
| 1211 | |
| 1212 | default: |
| 1213 | /* If this happens the bus probe function is buggy */ |
| 1214 | BUG(); |
| 1215 | } |
| 1216 | |
| 1217 | if (ret != 0) { |
| 1218 | dev_err(wm831x->dev, "Failed to add children\n"); |
| 1219 | goto err; |
| 1220 | } |
| 1221 | |
| 1222 | if (pdata && pdata->post_init) { |
| 1223 | ret = pdata->post_init(wm831x); |
| 1224 | if (ret != 0) { |
| 1225 | dev_err(wm831x->dev, "post_init() failed: %d\n", ret); |
| 1226 | goto err; |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | return 0; |
| 1231 | |
| 1232 | err: |
| 1233 | mfd_remove_devices(wm831x->dev); |
| 1234 | kfree(wm831x); |
| 1235 | return ret; |
| 1236 | } |
| 1237 | |
| 1238 | static void wm831x_device_exit(struct wm831x *wm831x) |
| 1239 | { |
| 1240 | mfd_remove_devices(wm831x->dev); |
| 1241 | kfree(wm831x); |
| 1242 | } |
| 1243 | |
| 1244 | static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg, |
| 1245 | int bytes, void *dest) |
| 1246 | { |
| 1247 | struct i2c_client *i2c = wm831x->control_data; |
| 1248 | int ret; |
| 1249 | u16 r = cpu_to_be16(reg); |
| 1250 | |
| 1251 | ret = i2c_master_send(i2c, (unsigned char *)&r, 2); |
| 1252 | if (ret < 0) |
| 1253 | return ret; |
| 1254 | if (ret != 2) |
| 1255 | return -EIO; |
| 1256 | |
| 1257 | ret = i2c_master_recv(i2c, dest, bytes); |
| 1258 | if (ret < 0) |
| 1259 | return ret; |
| 1260 | if (ret != bytes) |
| 1261 | return -EIO; |
| 1262 | return 0; |
| 1263 | } |
| 1264 | |
| 1265 | /* Currently we allocate the write buffer on the stack; this is OK for |
| 1266 | * small writes - if we need to do large writes this will need to be |
| 1267 | * revised. |
| 1268 | */ |
| 1269 | static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg, |
| 1270 | int bytes, void *src) |
| 1271 | { |
| 1272 | struct i2c_client *i2c = wm831x->control_data; |
| 1273 | unsigned char msg[bytes + 2]; |
| 1274 | int ret; |
| 1275 | |
| 1276 | reg = cpu_to_be16(reg); |
| 1277 | memcpy(&msg[0], ®, 2); |
| 1278 | memcpy(&msg[2], src, bytes); |
| 1279 | |
| 1280 | ret = i2c_master_send(i2c, msg, bytes + 2); |
| 1281 | if (ret < 0) |
| 1282 | return ret; |
| 1283 | if (ret < bytes + 2) |
| 1284 | return -EIO; |
| 1285 | |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | static int wm831x_i2c_probe(struct i2c_client *i2c, |
| 1290 | const struct i2c_device_id *id) |
| 1291 | { |
| 1292 | struct wm831x *wm831x; |
| 1293 | |
| 1294 | wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL); |
| 1295 | if (wm831x == NULL) { |
| 1296 | kfree(i2c); |
| 1297 | return -ENOMEM; |
| 1298 | } |
| 1299 | |
| 1300 | i2c_set_clientdata(i2c, wm831x); |
| 1301 | wm831x->dev = &i2c->dev; |
| 1302 | wm831x->control_data = i2c; |
| 1303 | wm831x->read_dev = wm831x_i2c_read_device; |
| 1304 | wm831x->write_dev = wm831x_i2c_write_device; |
| 1305 | |
| 1306 | return wm831x_device_init(wm831x, id->driver_data, i2c->irq); |
| 1307 | } |
| 1308 | |
| 1309 | static int wm831x_i2c_remove(struct i2c_client *i2c) |
| 1310 | { |
| 1311 | struct wm831x *wm831x = i2c_get_clientdata(i2c); |
| 1312 | |
| 1313 | wm831x_device_exit(wm831x); |
| 1314 | |
| 1315 | return 0; |
| 1316 | } |
| 1317 | |
| 1318 | static const struct i2c_device_id wm831x_i2c_id[] = { |
| 1319 | { "wm8310", WM8310 }, |
| 1320 | { "wm8311", WM8311 }, |
| 1321 | { "wm8312", WM8312 }, |
| 1322 | { } |
| 1323 | }; |
| 1324 | MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id); |
| 1325 | |
| 1326 | |
| 1327 | static struct i2c_driver wm831x_i2c_driver = { |
| 1328 | .driver = { |
| 1329 | .name = "wm831x", |
| 1330 | .owner = THIS_MODULE, |
| 1331 | }, |
| 1332 | .probe = wm831x_i2c_probe, |
| 1333 | .remove = wm831x_i2c_remove, |
| 1334 | .id_table = wm831x_i2c_id, |
| 1335 | }; |
| 1336 | |
| 1337 | static int __init wm831x_i2c_init(void) |
| 1338 | { |
| 1339 | int ret; |
| 1340 | |
| 1341 | ret = i2c_add_driver(&wm831x_i2c_driver); |
| 1342 | if (ret != 0) |
| 1343 | pr_err("Failed to register wm831x I2C driver: %d\n", ret); |
| 1344 | |
| 1345 | return ret; |
| 1346 | } |
| 1347 | subsys_initcall(wm831x_i2c_init); |
| 1348 | |
| 1349 | static void __exit wm831x_i2c_exit(void) |
| 1350 | { |
| 1351 | i2c_del_driver(&wm831x_i2c_driver); |
| 1352 | } |
| 1353 | module_exit(wm831x_i2c_exit); |
| 1354 | |
| 1355 | MODULE_DESCRIPTION("I2C support for the WM831X AudioPlus PMIC"); |
| 1356 | MODULE_LICENSE("GPL"); |
| 1357 | MODULE_AUTHOR("Mark Brown"); |