1 /* 2 * Copyright (C) 2017 Spreadtrum Communications Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #include <linux/delay.h> 8 #include <linux/hwspinlock.h> 9 #include <linux/init.h> 10 #include <linux/io.h> 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/of_device.h> 15 #include <linux/platform_device.h> 16 #include <linux/reboot.h> 17 #include <linux/spi/spi.h> 18 #include <linux/sizes.h> 19 20 /* Registers definitions for ADI controller */ 21 #define REG_ADI_CTRL0 0x4 22 #define REG_ADI_CHN_PRIL 0x8 23 #define REG_ADI_CHN_PRIH 0xc 24 #define REG_ADI_INT_EN 0x10 25 #define REG_ADI_INT_RAW 0x14 26 #define REG_ADI_INT_MASK 0x18 27 #define REG_ADI_INT_CLR 0x1c 28 #define REG_ADI_GSSI_CFG0 0x20 29 #define REG_ADI_GSSI_CFG1 0x24 30 #define REG_ADI_RD_CMD 0x28 31 #define REG_ADI_RD_DATA 0x2c 32 #define REG_ADI_ARM_FIFO_STS 0x30 33 #define REG_ADI_STS 0x34 34 #define REG_ADI_EVT_FIFO_STS 0x38 35 #define REG_ADI_ARM_CMD_STS 0x3c 36 #define REG_ADI_CHN_EN 0x40 37 #define REG_ADI_CHN_ADDR(id) (0x44 + (id - 2) * 4) 38 #define REG_ADI_CHN_EN1 0x20c 39 40 /* Bits definitions for register REG_ADI_GSSI_CFG0 */ 41 #define BIT_CLK_ALL_ON BIT(30) 42 43 /* Bits definitions for register REG_ADI_RD_DATA */ 44 #define BIT_RD_CMD_BUSY BIT(31) 45 #define RD_ADDR_SHIFT 16 46 #define RD_VALUE_MASK GENMASK(15, 0) 47 #define RD_ADDR_MASK GENMASK(30, 16) 48 49 /* Bits definitions for register REG_ADI_ARM_FIFO_STS */ 50 #define BIT_FIFO_FULL BIT(11) 51 #define BIT_FIFO_EMPTY BIT(10) 52 53 /* 54 * ADI slave devices include RTC, ADC, regulator, charger, thermal and so on. 55 * ADI supports 12/14bit address for r2p0, and additional 17bit for r3p0 or 56 * later versions. Since bit[1:0] are zero, so the spec describe them as 57 * 10/12/15bit address mode. 58 * The 10bit mode supports sigle slave, 12/15bit mode supports 3 slave, the 59 * high two bits is slave_id. 60 * The slave devices address offset is 0x8000 for 10/12bit address mode, 61 * and 0x20000 for 15bit mode. 62 */ 63 #define ADI_10BIT_SLAVE_ADDR_SIZE SZ_4K 64 #define ADI_10BIT_SLAVE_OFFSET 0x8000 65 #define ADI_12BIT_SLAVE_ADDR_SIZE SZ_16K 66 #define ADI_12BIT_SLAVE_OFFSET 0x8000 67 #define ADI_15BIT_SLAVE_ADDR_SIZE SZ_128K 68 #define ADI_15BIT_SLAVE_OFFSET 0x20000 69 70 /* Timeout (ms) for the trylock of hardware spinlocks */ 71 #define ADI_HWSPINLOCK_TIMEOUT 5000 72 /* 73 * ADI controller has 50 channels including 2 software channels 74 * and 48 hardware channels. 75 */ 76 #define ADI_HW_CHNS 50 77 78 #define ADI_FIFO_DRAIN_TIMEOUT 1000 79 #define ADI_READ_TIMEOUT 2000 80 81 /* 82 * Read back address from REG_ADI_RD_DATA bit[30:16] which maps to: 83 * REG_ADI_RD_CMD bit[14:0] for r2p0 84 * REG_ADI_RD_CMD bit[16:2] for r3p0 85 */ 86 #define RDBACK_ADDR_MASK_R2 GENMASK(14, 0) 87 #define RDBACK_ADDR_MASK_R3 GENMASK(16, 2) 88 #define RDBACK_ADDR_SHIFT_R3 2 89 90 /* Registers definitions for PMIC watchdog controller */ 91 #define REG_WDG_LOAD_LOW 0x0 92 #define REG_WDG_LOAD_HIGH 0x4 93 #define REG_WDG_CTRL 0x8 94 #define REG_WDG_LOCK 0x20 95 96 /* Bits definitions for register REG_WDG_CTRL */ 97 #define BIT_WDG_RUN BIT(1) 98 #define BIT_WDG_NEW BIT(2) 99 #define BIT_WDG_RST BIT(3) 100 101 /* Bits definitions for register REG_MODULE_EN */ 102 #define BIT_WDG_EN BIT(2) 103 104 /* Registers definitions for PMIC */ 105 #define PMIC_RST_STATUS 0xee8 106 #define PMIC_MODULE_EN 0xc08 107 #define PMIC_CLK_EN 0xc18 108 #define PMIC_WDG_BASE 0x80 109 110 /* Definition of PMIC reset status register */ 111 #define HWRST_STATUS_SECURITY 0x02 112 #define HWRST_STATUS_RECOVERY 0x20 113 #define HWRST_STATUS_NORMAL 0x40 114 #define HWRST_STATUS_ALARM 0x50 115 #define HWRST_STATUS_SLEEP 0x60 116 #define HWRST_STATUS_FASTBOOT 0x30 117 #define HWRST_STATUS_SPECIAL 0x70 118 #define HWRST_STATUS_PANIC 0x80 119 #define HWRST_STATUS_CFTREBOOT 0x90 120 #define HWRST_STATUS_AUTODLOADER 0xa0 121 #define HWRST_STATUS_IQMODE 0xb0 122 #define HWRST_STATUS_SPRDISK 0xc0 123 #define HWRST_STATUS_FACTORYTEST 0xe0 124 #define HWRST_STATUS_WATCHDOG 0xf0 125 126 /* Use default timeout 50 ms that converts to watchdog values */ 127 #define WDG_LOAD_VAL ((50 * 32768) / 1000) 128 #define WDG_LOAD_MASK GENMASK(15, 0) 129 #define WDG_UNLOCK_KEY 0xe551 130 131 struct sprd_adi_wdg { 132 u32 base; 133 u32 rst_sts; 134 u32 wdg_en; 135 u32 wdg_clk; 136 }; 137 138 struct sprd_adi_data { 139 u32 slave_offset; 140 u32 slave_addr_size; 141 int (*read_check)(u32 val, u32 reg); 142 int (*restart)(struct notifier_block *this, 143 unsigned long mode, void *cmd); 144 void (*wdg_rst)(void *p); 145 }; 146 147 struct sprd_adi { 148 struct spi_controller *ctlr; 149 struct device *dev; 150 void __iomem *base; 151 struct hwspinlock *hwlock; 152 unsigned long slave_vbase; 153 unsigned long slave_pbase; 154 struct notifier_block restart_handler; 155 const struct sprd_adi_data *data; 156 }; 157 158 static int sprd_adi_check_addr(struct sprd_adi *sadi, u32 reg) 159 { 160 if (reg >= sadi->data->slave_addr_size) { 161 dev_err(sadi->dev, 162 "slave address offset is incorrect, reg = 0x%x\n", 163 reg); 164 return -EINVAL; 165 } 166 167 return 0; 168 } 169 170 static int sprd_adi_drain_fifo(struct sprd_adi *sadi) 171 { 172 u32 timeout = ADI_FIFO_DRAIN_TIMEOUT; 173 u32 sts; 174 175 do { 176 sts = readl_relaxed(sadi->base + REG_ADI_ARM_FIFO_STS); 177 if (sts & BIT_FIFO_EMPTY) 178 break; 179 180 cpu_relax(); 181 } while (--timeout); 182 183 if (timeout == 0) { 184 dev_err(sadi->dev, "drain write fifo timeout\n"); 185 return -EBUSY; 186 } 187 188 return 0; 189 } 190 191 static int sprd_adi_fifo_is_full(struct sprd_adi *sadi) 192 { 193 return readl_relaxed(sadi->base + REG_ADI_ARM_FIFO_STS) & BIT_FIFO_FULL; 194 } 195 196 static int sprd_adi_read_check(u32 val, u32 addr) 197 { 198 u32 rd_addr; 199 200 rd_addr = (val & RD_ADDR_MASK) >> RD_ADDR_SHIFT; 201 202 if (rd_addr != addr) { 203 pr_err("ADI read error, addr = 0x%x, val = 0x%x\n", addr, val); 204 return -EIO; 205 } 206 207 return 0; 208 } 209 210 static int sprd_adi_read_check_r2(u32 val, u32 reg) 211 { 212 return sprd_adi_read_check(val, reg & RDBACK_ADDR_MASK_R2); 213 } 214 215 static int sprd_adi_read_check_r3(u32 val, u32 reg) 216 { 217 return sprd_adi_read_check(val, (reg & RDBACK_ADDR_MASK_R3) >> RDBACK_ADDR_SHIFT_R3); 218 } 219 220 static int sprd_adi_read(struct sprd_adi *sadi, u32 reg, u32 *read_val) 221 { 222 int read_timeout = ADI_READ_TIMEOUT; 223 unsigned long flags; 224 u32 val; 225 int ret = 0; 226 227 if (sadi->hwlock) { 228 ret = hwspin_lock_timeout_irqsave(sadi->hwlock, 229 ADI_HWSPINLOCK_TIMEOUT, 230 &flags); 231 if (ret) { 232 dev_err(sadi->dev, "get the hw lock failed\n"); 233 return ret; 234 } 235 } 236 237 ret = sprd_adi_check_addr(sadi, reg); 238 if (ret) 239 goto out; 240 241 /* 242 * Set the slave address offset need to read into RD_CMD register, 243 * then ADI controller will start to transfer automatically. 244 */ 245 writel_relaxed(reg, sadi->base + REG_ADI_RD_CMD); 246 247 /* 248 * Wait read operation complete, the BIT_RD_CMD_BUSY will be set 249 * simultaneously when writing read command to register, and the 250 * BIT_RD_CMD_BUSY will be cleared after the read operation is 251 * completed. 252 */ 253 do { 254 val = readl_relaxed(sadi->base + REG_ADI_RD_DATA); 255 if (!(val & BIT_RD_CMD_BUSY)) 256 break; 257 258 cpu_relax(); 259 } while (--read_timeout); 260 261 if (read_timeout == 0) { 262 dev_err(sadi->dev, "ADI read timeout\n"); 263 ret = -EBUSY; 264 goto out; 265 } 266 267 /* 268 * The return value before adi r5p0 includes data and read register 269 * address, from bit 0to bit 15 are data, and from bit 16 to bit 30 270 * are read register address. Then we can check the returned register 271 * address to validate data. 272 */ 273 if (sadi->data->read_check) { 274 ret = sadi->data->read_check(val, reg); 275 if (ret < 0) 276 goto out; 277 } 278 279 *read_val = val & RD_VALUE_MASK; 280 281 out: 282 if (sadi->hwlock) 283 hwspin_unlock_irqrestore(sadi->hwlock, &flags); 284 return ret; 285 } 286 287 static int sprd_adi_write(struct sprd_adi *sadi, u32 reg, u32 val) 288 { 289 u32 timeout = ADI_FIFO_DRAIN_TIMEOUT; 290 unsigned long flags; 291 int ret; 292 293 if (sadi->hwlock) { 294 ret = hwspin_lock_timeout_irqsave(sadi->hwlock, 295 ADI_HWSPINLOCK_TIMEOUT, 296 &flags); 297 if (ret) { 298 dev_err(sadi->dev, "get the hw lock failed\n"); 299 return ret; 300 } 301 } 302 303 ret = sprd_adi_check_addr(sadi, reg); 304 if (ret) 305 goto out; 306 307 ret = sprd_adi_drain_fifo(sadi); 308 if (ret < 0) 309 goto out; 310 311 /* 312 * we should wait for write fifo is empty before writing data to PMIC 313 * registers. 314 */ 315 do { 316 if (!sprd_adi_fifo_is_full(sadi)) { 317 /* we need virtual register address to write. */ 318 writel_relaxed(val, (void __iomem *)(sadi->slave_vbase + reg)); 319 break; 320 } 321 322 cpu_relax(); 323 } while (--timeout); 324 325 if (timeout == 0) { 326 dev_err(sadi->dev, "write fifo is full\n"); 327 ret = -EBUSY; 328 } 329 330 out: 331 if (sadi->hwlock) 332 hwspin_unlock_irqrestore(sadi->hwlock, &flags); 333 return ret; 334 } 335 336 static int sprd_adi_transfer_one(struct spi_controller *ctlr, 337 struct spi_device *spi_dev, 338 struct spi_transfer *t) 339 { 340 struct sprd_adi *sadi = spi_controller_get_devdata(ctlr); 341 u32 reg, val; 342 int ret; 343 344 if (t->rx_buf) { 345 reg = *(u32 *)t->rx_buf; 346 ret = sprd_adi_read(sadi, reg, &val); 347 *(u32 *)t->rx_buf = val; 348 } else if (t->tx_buf) { 349 u32 *p = (u32 *)t->tx_buf; 350 reg = *p++; 351 val = *p; 352 ret = sprd_adi_write(sadi, reg, val); 353 } else { 354 dev_err(sadi->dev, "no buffer for transfer\n"); 355 ret = -EINVAL; 356 } 357 358 return ret; 359 } 360 361 static void sprd_adi_set_wdt_rst_mode(void *p) 362 { 363 #if IS_ENABLED(CONFIG_SPRD_WATCHDOG) 364 u32 val; 365 struct sprd_adi *sadi = (struct sprd_adi *)p; 366 367 /* Init watchdog reset mode */ 368 sprd_adi_read(sadi, PMIC_RST_STATUS, &val); 369 val |= HWRST_STATUS_WATCHDOG; 370 sprd_adi_write(sadi, PMIC_RST_STATUS, val); 371 #endif 372 } 373 374 static int sprd_adi_restart(struct notifier_block *this, unsigned long mode, 375 void *cmd, struct sprd_adi_wdg *wdg) 376 { 377 struct sprd_adi *sadi = container_of(this, struct sprd_adi, 378 restart_handler); 379 u32 val, reboot_mode = 0; 380 381 if (!cmd) 382 reboot_mode = HWRST_STATUS_NORMAL; 383 else if (!strncmp(cmd, "recovery", 8)) 384 reboot_mode = HWRST_STATUS_RECOVERY; 385 else if (!strncmp(cmd, "alarm", 5)) 386 reboot_mode = HWRST_STATUS_ALARM; 387 else if (!strncmp(cmd, "fastsleep", 9)) 388 reboot_mode = HWRST_STATUS_SLEEP; 389 else if (!strncmp(cmd, "bootloader", 10)) 390 reboot_mode = HWRST_STATUS_FASTBOOT; 391 else if (!strncmp(cmd, "panic", 5)) 392 reboot_mode = HWRST_STATUS_PANIC; 393 else if (!strncmp(cmd, "special", 7)) 394 reboot_mode = HWRST_STATUS_SPECIAL; 395 else if (!strncmp(cmd, "cftreboot", 9)) 396 reboot_mode = HWRST_STATUS_CFTREBOOT; 397 else if (!strncmp(cmd, "autodloader", 11)) 398 reboot_mode = HWRST_STATUS_AUTODLOADER; 399 else if (!strncmp(cmd, "iqmode", 6)) 400 reboot_mode = HWRST_STATUS_IQMODE; 401 else if (!strncmp(cmd, "sprdisk", 7)) 402 reboot_mode = HWRST_STATUS_SPRDISK; 403 else if (!strncmp(cmd, "tospanic", 8)) 404 reboot_mode = HWRST_STATUS_SECURITY; 405 else if (!strncmp(cmd, "factorytest", 11)) 406 reboot_mode = HWRST_STATUS_FACTORYTEST; 407 else 408 reboot_mode = HWRST_STATUS_NORMAL; 409 410 /* Record the reboot mode */ 411 sprd_adi_read(sadi, wdg->rst_sts, &val); 412 val &= ~HWRST_STATUS_WATCHDOG; 413 val |= reboot_mode; 414 sprd_adi_write(sadi, wdg->rst_sts, val); 415 416 /* Enable the interface clock of the watchdog */ 417 sprd_adi_read(sadi, wdg->wdg_en, &val); 418 val |= BIT_WDG_EN; 419 sprd_adi_write(sadi, wdg->wdg_en, val); 420 421 /* Enable the work clock of the watchdog */ 422 sprd_adi_read(sadi, wdg->wdg_clk, &val); 423 val |= BIT_WDG_EN; 424 sprd_adi_write(sadi, wdg->wdg_clk, val); 425 426 /* Unlock the watchdog */ 427 sprd_adi_write(sadi, wdg->base + REG_WDG_LOCK, WDG_UNLOCK_KEY); 428 429 sprd_adi_read(sadi, wdg->base + REG_WDG_CTRL, &val); 430 val |= BIT_WDG_NEW; 431 sprd_adi_write(sadi, wdg->base + REG_WDG_CTRL, val); 432 433 /* Load the watchdog timeout value, 50ms is always enough. */ 434 sprd_adi_write(sadi, wdg->base + REG_WDG_LOAD_HIGH, 0); 435 sprd_adi_write(sadi, wdg->base + REG_WDG_LOAD_LOW, 436 WDG_LOAD_VAL & WDG_LOAD_MASK); 437 438 /* Start the watchdog to reset system */ 439 sprd_adi_read(sadi, wdg->base + REG_WDG_CTRL, &val); 440 val |= BIT_WDG_RUN | BIT_WDG_RST; 441 sprd_adi_write(sadi, wdg->base + REG_WDG_CTRL, val); 442 443 /* Lock the watchdog */ 444 sprd_adi_write(sadi, wdg->base + REG_WDG_LOCK, ~WDG_UNLOCK_KEY); 445 446 mdelay(1000); 447 448 dev_emerg(sadi->dev, "Unable to restart system\n"); 449 return NOTIFY_DONE; 450 } 451 452 static int sprd_adi_restart_sc9860(struct notifier_block *this, 453 unsigned long mode, void *cmd) 454 { 455 struct sprd_adi_wdg wdg = { 456 .base = PMIC_WDG_BASE, 457 .rst_sts = PMIC_RST_STATUS, 458 .wdg_en = PMIC_MODULE_EN, 459 .wdg_clk = PMIC_CLK_EN, 460 }; 461 462 return sprd_adi_restart(this, mode, cmd, &wdg); 463 } 464 465 static void sprd_adi_hw_init(struct sprd_adi *sadi) 466 { 467 struct device_node *np = sadi->dev->of_node; 468 int i, size, chn_cnt; 469 const __be32 *list; 470 u32 tmp; 471 472 /* Set all channels as default priority */ 473 writel_relaxed(0, sadi->base + REG_ADI_CHN_PRIL); 474 writel_relaxed(0, sadi->base + REG_ADI_CHN_PRIH); 475 476 /* Set clock auto gate mode */ 477 tmp = readl_relaxed(sadi->base + REG_ADI_GSSI_CFG0); 478 tmp &= ~BIT_CLK_ALL_ON; 479 writel_relaxed(tmp, sadi->base + REG_ADI_GSSI_CFG0); 480 481 /* Set hardware channels setting */ 482 list = of_get_property(np, "sprd,hw-channels", &size); 483 if (!list || !size) { 484 dev_info(sadi->dev, "no hw channels setting in node\n"); 485 return; 486 } 487 488 chn_cnt = size / 8; 489 for (i = 0; i < chn_cnt; i++) { 490 u32 value; 491 u32 chn_id = be32_to_cpu(*list++); 492 u32 chn_config = be32_to_cpu(*list++); 493 494 /* Channel 0 and 1 are software channels */ 495 if (chn_id < 2) 496 continue; 497 498 writel_relaxed(chn_config, sadi->base + 499 REG_ADI_CHN_ADDR(chn_id)); 500 501 if (chn_id < 32) { 502 value = readl_relaxed(sadi->base + REG_ADI_CHN_EN); 503 value |= BIT(chn_id); 504 writel_relaxed(value, sadi->base + REG_ADI_CHN_EN); 505 } else if (chn_id < ADI_HW_CHNS) { 506 value = readl_relaxed(sadi->base + REG_ADI_CHN_EN1); 507 value |= BIT(chn_id - 32); 508 writel_relaxed(value, sadi->base + REG_ADI_CHN_EN1); 509 } 510 } 511 } 512 513 static int sprd_adi_probe(struct platform_device *pdev) 514 { 515 struct device_node *np = pdev->dev.of_node; 516 const struct sprd_adi_data *data; 517 struct spi_controller *ctlr; 518 struct sprd_adi *sadi; 519 struct resource *res; 520 u16 num_chipselect; 521 int ret; 522 523 if (!np) { 524 dev_err(&pdev->dev, "can not find the adi bus node\n"); 525 return -ENODEV; 526 } 527 528 data = of_device_get_match_data(&pdev->dev); 529 if (!data) { 530 dev_err(&pdev->dev, "no matching driver data found\n"); 531 return -EINVAL; 532 } 533 534 pdev->id = of_alias_get_id(np, "spi"); 535 num_chipselect = of_get_child_count(np); 536 537 ctlr = spi_alloc_master(&pdev->dev, sizeof(struct sprd_adi)); 538 if (!ctlr) 539 return -ENOMEM; 540 541 dev_set_drvdata(&pdev->dev, ctlr); 542 sadi = spi_controller_get_devdata(ctlr); 543 544 sadi->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 545 if (IS_ERR(sadi->base)) { 546 ret = PTR_ERR(sadi->base); 547 goto put_ctlr; 548 } 549 550 sadi->slave_vbase = (unsigned long)sadi->base + 551 data->slave_offset; 552 sadi->slave_pbase = res->start + data->slave_offset; 553 sadi->ctlr = ctlr; 554 sadi->dev = &pdev->dev; 555 sadi->data = data; 556 ret = of_hwspin_lock_get_id(np, 0); 557 if (ret > 0 || (IS_ENABLED(CONFIG_HWSPINLOCK) && ret == 0)) { 558 sadi->hwlock = 559 devm_hwspin_lock_request_specific(&pdev->dev, ret); 560 if (!sadi->hwlock) { 561 ret = -ENXIO; 562 goto put_ctlr; 563 } 564 } else { 565 switch (ret) { 566 case -ENOENT: 567 dev_info(&pdev->dev, "no hardware spinlock supplied\n"); 568 break; 569 default: 570 dev_err_probe(&pdev->dev, ret, "failed to find hwlock id\n"); 571 goto put_ctlr; 572 } 573 } 574 575 sprd_adi_hw_init(sadi); 576 577 if (sadi->data->wdg_rst) 578 sadi->data->wdg_rst(sadi); 579 580 ctlr->dev.of_node = pdev->dev.of_node; 581 ctlr->bus_num = pdev->id; 582 ctlr->num_chipselect = num_chipselect; 583 ctlr->flags = SPI_MASTER_HALF_DUPLEX; 584 ctlr->bits_per_word_mask = 0; 585 ctlr->transfer_one = sprd_adi_transfer_one; 586 587 ret = devm_spi_register_controller(&pdev->dev, ctlr); 588 if (ret) { 589 dev_err(&pdev->dev, "failed to register SPI controller\n"); 590 goto put_ctlr; 591 } 592 593 if (sadi->data->restart) { 594 sadi->restart_handler.notifier_call = sadi->data->restart; 595 sadi->restart_handler.priority = 128; 596 ret = register_restart_handler(&sadi->restart_handler); 597 if (ret) { 598 dev_err(&pdev->dev, "can not register restart handler\n"); 599 goto put_ctlr; 600 } 601 } 602 603 return 0; 604 605 put_ctlr: 606 spi_controller_put(ctlr); 607 return ret; 608 } 609 610 static void sprd_adi_remove(struct platform_device *pdev) 611 { 612 struct spi_controller *ctlr = dev_get_drvdata(&pdev->dev); 613 struct sprd_adi *sadi = spi_controller_get_devdata(ctlr); 614 615 unregister_restart_handler(&sadi->restart_handler); 616 } 617 618 static struct sprd_adi_data sc9860_data = { 619 .slave_offset = ADI_10BIT_SLAVE_OFFSET, 620 .slave_addr_size = ADI_10BIT_SLAVE_ADDR_SIZE, 621 .read_check = sprd_adi_read_check_r2, 622 .restart = sprd_adi_restart_sc9860, 623 .wdg_rst = sprd_adi_set_wdt_rst_mode, 624 }; 625 626 static struct sprd_adi_data sc9863_data = { 627 .slave_offset = ADI_12BIT_SLAVE_OFFSET, 628 .slave_addr_size = ADI_12BIT_SLAVE_ADDR_SIZE, 629 .read_check = sprd_adi_read_check_r3, 630 }; 631 632 static struct sprd_adi_data ums512_data = { 633 .slave_offset = ADI_15BIT_SLAVE_OFFSET, 634 .slave_addr_size = ADI_15BIT_SLAVE_ADDR_SIZE, 635 .read_check = sprd_adi_read_check_r3, 636 }; 637 638 static const struct of_device_id sprd_adi_of_match[] = { 639 { 640 .compatible = "sprd,sc9860-adi", 641 .data = &sc9860_data, 642 }, 643 { 644 .compatible = "sprd,sc9863-adi", 645 .data = &sc9863_data, 646 }, 647 { 648 .compatible = "sprd,ums512-adi", 649 .data = &ums512_data, 650 }, 651 { }, 652 }; 653 MODULE_DEVICE_TABLE(of, sprd_adi_of_match); 654 655 static struct platform_driver sprd_adi_driver = { 656 .driver = { 657 .name = "sprd-adi", 658 .of_match_table = sprd_adi_of_match, 659 }, 660 .probe = sprd_adi_probe, 661 .remove_new = sprd_adi_remove, 662 }; 663 module_platform_driver(sprd_adi_driver); 664 665 MODULE_DESCRIPTION("Spreadtrum ADI Controller Driver"); 666 MODULE_AUTHOR("Baolin Wang <Baolin.Wang@spreadtrum.com>"); 667 MODULE_LICENSE("GPL v2"); 668