1 /* 2 * From coreboot southbridge/intel/bd82x6x/lpc.c 3 * 4 * Copyright (C) 2008-2009 coresystems GmbH 5 * 6 * SPDX-License-Identifier: GPL-2.0 7 */ 8 9 #include <common.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <fdtdec.h> 13 #include <rtc.h> 14 #include <pci.h> 15 #include <asm/acpi.h> 16 #include <asm/interrupt.h> 17 #include <asm/io.h> 18 #include <asm/ioapic.h> 19 #include <asm/pci.h> 20 #include <asm/arch/pch.h> 21 22 #define NMI_OFF 0 23 24 #define ENABLE_ACPI_MODE_IN_COREBOOT 0 25 #define TEST_SMM_FLASH_LOCKDOWN 0 26 27 static int pch_enable_apic(pci_dev_t dev) 28 { 29 u32 reg32; 30 int i; 31 32 /* Enable ACPI I/O and power management. Set SCI IRQ to IRQ9 */ 33 x86_pci_write_config8(dev, ACPI_CNTL, 0x80); 34 35 writel(0, IO_APIC_INDEX); 36 writel(1 << 25, IO_APIC_DATA); 37 38 /* affirm full set of redirection table entries ("write once") */ 39 writel(1, IO_APIC_INDEX); 40 reg32 = readl(IO_APIC_DATA); 41 writel(1, IO_APIC_INDEX); 42 writel(reg32, IO_APIC_DATA); 43 44 writel(0, IO_APIC_INDEX); 45 reg32 = readl(IO_APIC_DATA); 46 debug("PCH APIC ID = %x\n", (reg32 >> 24) & 0x0f); 47 if (reg32 != (1 << 25)) { 48 printf("APIC Error - cannot write to registers\n"); 49 return -EPERM; 50 } 51 52 debug("Dumping IOAPIC registers\n"); 53 for (i = 0; i < 3; i++) { 54 writel(i, IO_APIC_INDEX); 55 debug(" reg 0x%04x:", i); 56 reg32 = readl(IO_APIC_DATA); 57 debug(" 0x%08x\n", reg32); 58 } 59 60 /* Select Boot Configuration register. */ 61 writel(3, IO_APIC_INDEX); 62 63 /* Use Processor System Bus to deliver interrupts. */ 64 writel(1, IO_APIC_DATA); 65 66 return 0; 67 } 68 69 static void pch_enable_serial_irqs(pci_dev_t dev) 70 { 71 u32 value; 72 73 /* Set packet length and toggle silent mode bit for one frame. */ 74 value = (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0); 75 #ifdef CONFIG_SERIRQ_CONTINUOUS_MODE 76 x86_pci_write_config8(dev, SERIRQ_CNTL, value); 77 #else 78 x86_pci_write_config8(dev, SERIRQ_CNTL, value | (1 << 6)); 79 #endif 80 } 81 82 static int pch_pirq_init(const void *blob, int node, pci_dev_t dev) 83 { 84 uint8_t route[8], *ptr; 85 86 if (fdtdec_get_byte_array(blob, node, "intel,pirq-routing", route, 87 sizeof(route))) 88 return -EINVAL; 89 ptr = route; 90 x86_pci_write_config8(dev, PIRQA_ROUT, *ptr++); 91 x86_pci_write_config8(dev, PIRQB_ROUT, *ptr++); 92 x86_pci_write_config8(dev, PIRQC_ROUT, *ptr++); 93 x86_pci_write_config8(dev, PIRQD_ROUT, *ptr++); 94 95 x86_pci_write_config8(dev, PIRQE_ROUT, *ptr++); 96 x86_pci_write_config8(dev, PIRQF_ROUT, *ptr++); 97 x86_pci_write_config8(dev, PIRQG_ROUT, *ptr++); 98 x86_pci_write_config8(dev, PIRQH_ROUT, *ptr++); 99 100 /* 101 * TODO(sjg@chromium.org): U-Boot does not set up the interrupts 102 * here. It's unclear if it is needed 103 */ 104 return 0; 105 } 106 107 static int pch_gpi_routing(const void *blob, int node, pci_dev_t dev) 108 { 109 u8 route[16]; 110 u32 reg; 111 int gpi; 112 113 if (fdtdec_get_byte_array(blob, node, "intel,gpi-routing", route, 114 sizeof(route))) 115 return -EINVAL; 116 117 for (reg = 0, gpi = 0; gpi < ARRAY_SIZE(route); gpi++) 118 reg |= route[gpi] << (gpi * 2); 119 120 x86_pci_write_config32(dev, 0xb8, reg); 121 122 return 0; 123 } 124 125 static int pch_power_options(const void *blob, int node, pci_dev_t dev) 126 { 127 u8 reg8; 128 u16 reg16, pmbase; 129 u32 reg32; 130 const char *state; 131 int pwr_on; 132 int nmi_option; 133 int ret; 134 135 /* 136 * Which state do we want to goto after g3 (power restored)? 137 * 0 == S0 Full On 138 * 1 == S5 Soft Off 139 * 140 * If the option is not existent (Laptops), use Kconfig setting. 141 * TODO(sjg@chromium.org): Make this configurable 142 */ 143 pwr_on = MAINBOARD_POWER_ON; 144 145 reg16 = x86_pci_read_config16(dev, GEN_PMCON_3); 146 reg16 &= 0xfffe; 147 switch (pwr_on) { 148 case MAINBOARD_POWER_OFF: 149 reg16 |= 1; 150 state = "off"; 151 break; 152 case MAINBOARD_POWER_ON: 153 reg16 &= ~1; 154 state = "on"; 155 break; 156 case MAINBOARD_POWER_KEEP: 157 reg16 &= ~1; 158 state = "state keep"; 159 break; 160 default: 161 state = "undefined"; 162 } 163 164 reg16 &= ~(3 << 4); /* SLP_S4# Assertion Stretch 4s */ 165 reg16 |= (1 << 3); /* SLP_S4# Assertion Stretch Enable */ 166 167 reg16 &= ~(1 << 10); 168 reg16 |= (1 << 11); /* SLP_S3# Min Assertion Width 50ms */ 169 170 reg16 |= (1 << 12); /* Disable SLP stretch after SUS well */ 171 172 x86_pci_write_config16(dev, GEN_PMCON_3, reg16); 173 debug("Set power %s after power failure.\n", state); 174 175 /* Set up NMI on errors. */ 176 reg8 = inb(0x61); 177 reg8 &= 0x0f; /* Higher Nibble must be 0 */ 178 reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */ 179 reg8 |= (1 << 2); /* PCI SERR# Disable for now */ 180 outb(reg8, 0x61); 181 182 reg8 = inb(0x70); 183 /* TODO(sjg@chromium.org): Make this configurable */ 184 nmi_option = NMI_OFF; 185 if (nmi_option) { 186 debug("NMI sources enabled.\n"); 187 reg8 &= ~(1 << 7); /* Set NMI. */ 188 } else { 189 debug("NMI sources disabled.\n"); 190 /* Can't mask NMI from PCI-E and NMI_NOW */ 191 reg8 |= (1 << 7); 192 } 193 outb(reg8, 0x70); 194 195 /* Enable CPU_SLP# and Intel Speedstep, set SMI# rate down */ 196 reg16 = x86_pci_read_config16(dev, GEN_PMCON_1); 197 reg16 &= ~(3 << 0); /* SMI# rate 1 minute */ 198 reg16 &= ~(1 << 10); /* Disable BIOS_PCI_EXP_EN for native PME */ 199 #if DEBUG_PERIODIC_SMIS 200 /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using periodic SMIs */ 201 reg16 |= (3 << 0); /* Periodic SMI every 8s */ 202 #endif 203 x86_pci_write_config16(dev, GEN_PMCON_1, reg16); 204 205 /* Set the board's GPI routing. */ 206 ret = pch_gpi_routing(blob, node, dev); 207 if (ret) 208 return ret; 209 210 pmbase = x86_pci_read_config16(dev, 0x40) & 0xfffe; 211 212 writel(pmbase + GPE0_EN, fdtdec_get_int(blob, node, 213 "intel,gpe0-enable", 0)); 214 writew(pmbase + ALT_GP_SMI_EN, fdtdec_get_int(blob, node, 215 "intel,alt-gp-smi-enable", 0)); 216 217 /* Set up power management block and determine sleep mode */ 218 reg32 = inl(pmbase + 0x04); /* PM1_CNT */ 219 reg32 &= ~(7 << 10); /* SLP_TYP */ 220 reg32 |= (1 << 0); /* SCI_EN */ 221 outl(reg32, pmbase + 0x04); 222 223 /* Clear magic status bits to prevent unexpected wake */ 224 setbits_le32(RCB_REG(0x3310), (1 << 4) | (1 << 5) | (1 << 0)); 225 clrbits_le32(RCB_REG(0x3f02), 0xf); 226 227 return 0; 228 } 229 230 static void pch_rtc_init(pci_dev_t dev) 231 { 232 int rtc_failed; 233 u8 reg8; 234 235 reg8 = x86_pci_read_config8(dev, GEN_PMCON_3); 236 rtc_failed = reg8 & RTC_BATTERY_DEAD; 237 if (rtc_failed) { 238 reg8 &= ~RTC_BATTERY_DEAD; 239 x86_pci_write_config8(dev, GEN_PMCON_3, reg8); 240 } 241 debug("rtc_failed = 0x%x\n", rtc_failed); 242 243 #if CONFIG_HAVE_ACPI_RESUME 244 /* Avoid clearing pending interrupts and resetting the RTC control 245 * register in the resume path because the Linux kernel relies on 246 * this to know if it should restart the RTC timerqueue if the wake 247 * was due to the RTC alarm. 248 */ 249 if (acpi_get_slp_type() == 3) 250 return; 251 #endif 252 /* TODO: Handle power failure */ 253 if (rtc_failed) 254 printf("RTC power failed\n"); 255 } 256 257 /* CougarPoint PCH Power Management init */ 258 static void cpt_pm_init(pci_dev_t dev) 259 { 260 debug("CougarPoint PM init\n"); 261 x86_pci_write_config8(dev, 0xa9, 0x47); 262 setbits_le32(RCB_REG(0x2238), (1 << 6) | (1 << 0)); 263 264 setbits_le32(RCB_REG(0x228c), 1 << 0); 265 setbits_le32(RCB_REG(0x1100), (1 << 13) | (1 << 14)); 266 setbits_le32(RCB_REG(0x0900), 1 << 14); 267 writel(0xc0388400, RCB_REG(0x2304)); 268 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18)); 269 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1)); 270 clrsetbits_le32(RCB_REG(0x3314), ~0x1f, 0xf); 271 writel(0x050f0000, RCB_REG(0x3318)); 272 writel(0x04000000, RCB_REG(0x3324)); 273 setbits_le32(RCB_REG(0x3340), 0xfffff); 274 setbits_le32(RCB_REG(0x3344), 1 << 1); 275 276 writel(0x0001c000, RCB_REG(0x3360)); 277 writel(0x00061100, RCB_REG(0x3368)); 278 writel(0x7f8fdfff, RCB_REG(0x3378)); 279 writel(0x000003fc, RCB_REG(0x337c)); 280 writel(0x00001000, RCB_REG(0x3388)); 281 writel(0x0001c000, RCB_REG(0x3390)); 282 writel(0x00000800, RCB_REG(0x33a0)); 283 writel(0x00001000, RCB_REG(0x33b0)); 284 writel(0x00093900, RCB_REG(0x33c0)); 285 writel(0x24653002, RCB_REG(0x33cc)); 286 writel(0x062108fe, RCB_REG(0x33d0)); 287 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060); 288 writel(0x01010000, RCB_REG(0x3a28)); 289 writel(0x01010404, RCB_REG(0x3a2c)); 290 writel(0x01041041, RCB_REG(0x3a80)); 291 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001); 292 setbits_le32(RCB_REG(0x3a84), 1 << 24); /* SATA 2/3 disabled */ 293 setbits_le32(RCB_REG(0x3a88), 1 << 0); /* SATA 4/5 disabled */ 294 writel(0x00000001, RCB_REG(0x3a6c)); 295 clrsetbits_le32(RCB_REG(0x2344), ~0x00ffff00, 0xff00000c); 296 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20); 297 writel(0, RCB_REG(0x33c8)); 298 setbits_le32(RCB_REG(0x21b0), 0xf); 299 } 300 301 /* PantherPoint PCH Power Management init */ 302 static void ppt_pm_init(pci_dev_t dev) 303 { 304 debug("PantherPoint PM init\n"); 305 x86_pci_write_config8(dev, 0xa9, 0x47); 306 setbits_le32(RCB_REG(0x2238), 1 << 0); 307 setbits_le32(RCB_REG(0x228c), 1 << 0); 308 setbits_le16(RCB_REG(0x1100), (1 << 13) | (1 << 14)); 309 setbits_le16(RCB_REG(0x0900), 1 << 14); 310 writel(0xc03b8400, RCB_REG(0x2304)); 311 setbits_le32(RCB_REG(0x2314), (1 << 5) | (1 << 18)); 312 setbits_le32(RCB_REG(0x2320), (1 << 15) | (1 << 1)); 313 clrsetbits_le32(RCB_REG(0x3314), 0x1f, 0xf); 314 writel(0x054f0000, RCB_REG(0x3318)); 315 writel(0x04000000, RCB_REG(0x3324)); 316 setbits_le32(RCB_REG(0x3340), 0xfffff); 317 setbits_le32(RCB_REG(0x3344), (1 << 1) | (1 << 0)); 318 writel(0x0001c000, RCB_REG(0x3360)); 319 writel(0x00061100, RCB_REG(0x3368)); 320 writel(0x7f8fdfff, RCB_REG(0x3378)); 321 writel(0x000003fd, RCB_REG(0x337c)); 322 writel(0x00001000, RCB_REG(0x3388)); 323 writel(0x0001c000, RCB_REG(0x3390)); 324 writel(0x00000800, RCB_REG(0x33a0)); 325 writel(0x00001000, RCB_REG(0x33b0)); 326 writel(0x00093900, RCB_REG(0x33c0)); 327 writel(0x24653002, RCB_REG(0x33cc)); 328 writel(0x067388fe, RCB_REG(0x33d0)); 329 clrsetbits_le32(RCB_REG(0x33d4), 0x0fff0fff, 0x00670060); 330 writel(0x01010000, RCB_REG(0x3a28)); 331 writel(0x01010404, RCB_REG(0x3a2c)); 332 writel(0x01040000, RCB_REG(0x3a80)); 333 clrsetbits_le32(RCB_REG(0x3a84), 0x0000ffff, 0x00001001); 334 /* SATA 2/3 disabled */ 335 setbits_le32(RCB_REG(0x3a84), 1 << 24); 336 /* SATA 4/5 disabled */ 337 setbits_le32(RCB_REG(0x3a88), 1 << 0); 338 writel(0x00000001, RCB_REG(0x3a6c)); 339 clrsetbits_le32(RCB_REG(0x2344), 0xff0000ff, 0xff00000c); 340 clrsetbits_le32(RCB_REG(0x80c), 0xff << 20, 0x11 << 20); 341 setbits_le32(RCB_REG(0x33a4), (1 << 0)); 342 writel(0, RCB_REG(0x33c8)); 343 setbits_le32(RCB_REG(0x21b0), 0xf); 344 } 345 346 static void enable_hpet(void) 347 { 348 /* Move HPET to default address 0xfed00000 and enable it */ 349 clrsetbits_le32(RCB_REG(HPTC), 3 << 0, 1 << 7); 350 } 351 352 static void enable_clock_gating(pci_dev_t dev) 353 { 354 u32 reg32; 355 u16 reg16; 356 357 setbits_le32(RCB_REG(0x2234), 0xf); 358 359 reg16 = x86_pci_read_config16(dev, GEN_PMCON_1); 360 reg16 |= (1 << 2) | (1 << 11); 361 x86_pci_write_config16(dev, GEN_PMCON_1, reg16); 362 363 pch_iobp_update(0xEB007F07, ~0UL, (1 << 31)); 364 pch_iobp_update(0xEB004000, ~0UL, (1 << 7)); 365 pch_iobp_update(0xEC007F07, ~0UL, (1 << 31)); 366 pch_iobp_update(0xEC004000, ~0UL, (1 << 7)); 367 368 reg32 = readl(RCB_REG(CG)); 369 reg32 |= (1 << 31); 370 reg32 |= (1 << 29) | (1 << 28); 371 reg32 |= (1 << 27) | (1 << 26) | (1 << 25) | (1 << 24); 372 reg32 |= (1 << 16); 373 reg32 |= (1 << 17); 374 reg32 |= (1 << 18); 375 reg32 |= (1 << 22); 376 reg32 |= (1 << 23); 377 reg32 &= ~(1 << 20); 378 reg32 |= (1 << 19); 379 reg32 |= (1 << 0); 380 reg32 |= (0xf << 1); 381 writel(reg32, RCB_REG(CG)); 382 383 setbits_le32(RCB_REG(0x38c0), 0x7); 384 setbits_le32(RCB_REG(0x36d4), 0x6680c004); 385 setbits_le32(RCB_REG(0x3564), 0x3); 386 } 387 388 #if CONFIG_HAVE_SMI_HANDLER 389 static void pch_lock_smm(pci_dev_t dev) 390 { 391 #if TEST_SMM_FLASH_LOCKDOWN 392 u8 reg8; 393 #endif 394 395 if (acpi_slp_type != 3) { 396 #if ENABLE_ACPI_MODE_IN_COREBOOT 397 debug("Enabling ACPI via APMC:\n"); 398 outb(0xe1, 0xb2); /* Enable ACPI mode */ 399 debug("done.\n"); 400 #else 401 debug("Disabling ACPI via APMC:\n"); 402 outb(0x1e, 0xb2); /* Disable ACPI mode */ 403 debug("done.\n"); 404 #endif 405 } 406 407 /* Don't allow evil boot loaders, kernels, or 408 * userspace applications to deceive us: 409 */ 410 smm_lock(); 411 412 #if TEST_SMM_FLASH_LOCKDOWN 413 /* Now try this: */ 414 debug("Locking BIOS to RO... "); 415 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ 416 debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off", 417 (reg8 & 1) ? "rw" : "ro"); 418 reg8 &= ~(1 << 0); /* clear BIOSWE */ 419 x86_pci_write_config8(dev, 0xdc, reg8); 420 reg8 |= (1 << 1); /* set BLE */ 421 x86_pci_write_config8(dev, 0xdc, reg8); 422 debug("ok.\n"); 423 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ 424 debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off", 425 (reg8 & 1) ? "rw" : "ro"); 426 427 debug("Writing:\n"); 428 writeb(0, 0xfff00000); 429 debug("Testing:\n"); 430 reg8 |= (1 << 0); /* set BIOSWE */ 431 x86_pci_write_config8(dev, 0xdc, reg8); 432 433 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ 434 debug(" BLE: %s; BWE: %s\n", (reg8 & 2) ? "on" : "off", 435 (reg8 & 1) ? "rw" : "ro"); 436 debug("Done.\n"); 437 #endif 438 } 439 #endif 440 441 static void pch_disable_smm_only_flashing(pci_dev_t dev) 442 { 443 u8 reg8; 444 445 debug("Enabling BIOS updates outside of SMM... "); 446 reg8 = x86_pci_read_config8(dev, 0xdc); /* BIOS_CNTL */ 447 reg8 &= ~(1 << 5); 448 x86_pci_write_config8(dev, 0xdc, reg8); 449 } 450 451 static void pch_fixups(pci_dev_t dev) 452 { 453 u8 gen_pmcon_2; 454 455 /* Indicate DRAM init done for MRC S3 to know it can resume */ 456 gen_pmcon_2 = x86_pci_read_config8(dev, GEN_PMCON_2); 457 gen_pmcon_2 |= (1 << 7); 458 x86_pci_write_config8(dev, GEN_PMCON_2, gen_pmcon_2); 459 460 /* Enable DMI ASPM in the PCH */ 461 clrbits_le32(RCB_REG(0x2304), 1 << 10); 462 setbits_le32(RCB_REG(0x21a4), (1 << 11) | (1 << 10)); 463 setbits_le32(RCB_REG(0x21a8), 0x3); 464 } 465 466 int lpc_early_init(const void *blob, int node, pci_dev_t dev) 467 { 468 struct reg_info { 469 u32 base; 470 u32 size; 471 } values[4], *ptr; 472 int count; 473 int i; 474 475 count = fdtdec_get_int_array_count(blob, node, "intel,gen-dec", 476 (u32 *)values, sizeof(values) / sizeof(u32)); 477 if (count < 0) 478 return -EINVAL; 479 480 /* Set COM1/COM2 decode range */ 481 x86_pci_write_config16(dev, LPC_IO_DEC, 0x0010); 482 483 /* Enable PS/2 Keyboard/Mouse, EC areas and COM1 */ 484 x86_pci_write_config16(dev, LPC_EN, KBC_LPC_EN | MC_LPC_EN | 485 GAMEL_LPC_EN | COMA_LPC_EN); 486 487 /* Write all registers but use 0 if we run out of data */ 488 count = count * sizeof(u32) / sizeof(values[0]); 489 for (i = 0, ptr = values; i < ARRAY_SIZE(values); i++, ptr++) { 490 u32 reg = 0; 491 492 if (i < count) 493 reg = ptr->base | PCI_COMMAND_IO | (ptr->size << 16); 494 x86_pci_write_config32(dev, LPC_GENX_DEC(i), reg); 495 } 496 497 return 0; 498 } 499 500 int lpc_init(struct pci_controller *hose, pci_dev_t dev) 501 { 502 const void *blob = gd->fdt_blob; 503 int node; 504 505 debug("pch: lpc_init\n"); 506 pci_write_bar32(hose, dev, 0, 0); 507 pci_write_bar32(hose, dev, 1, 0xff800000); 508 pci_write_bar32(hose, dev, 2, 0xfec00000); 509 pci_write_bar32(hose, dev, 3, 0x800); 510 pci_write_bar32(hose, dev, 4, 0x900); 511 512 node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_PCH); 513 if (node < 0) 514 return -ENOENT; 515 516 /* Set the value for PCI command register. */ 517 x86_pci_write_config16(dev, PCI_COMMAND, 0x000f); 518 519 /* IO APIC initialization. */ 520 pch_enable_apic(dev); 521 522 pch_enable_serial_irqs(dev); 523 524 /* Setup the PIRQ. */ 525 pch_pirq_init(blob, node, dev); 526 527 /* Setup power options. */ 528 pch_power_options(blob, node, dev); 529 530 /* Initialize power management */ 531 switch (pch_silicon_type()) { 532 case PCH_TYPE_CPT: /* CougarPoint */ 533 cpt_pm_init(dev); 534 break; 535 case PCH_TYPE_PPT: /* PantherPoint */ 536 ppt_pm_init(dev); 537 break; 538 default: 539 printf("Unknown Chipset: %#02x.%dx\n", PCI_DEV(dev), 540 PCI_FUNC(dev)); 541 return -ENOSYS; 542 } 543 544 /* Initialize the real time clock. */ 545 pch_rtc_init(dev); 546 547 /* Initialize the High Precision Event Timers, if present. */ 548 enable_hpet(); 549 550 /* Initialize Clock Gating */ 551 enable_clock_gating(dev); 552 553 pch_disable_smm_only_flashing(dev); 554 555 #if CONFIG_HAVE_SMI_HANDLER 556 pch_lock_smm(dev); 557 #endif 558 559 pch_fixups(dev); 560 561 return 0; 562 } 563 564 void lpc_enable(pci_dev_t dev) 565 { 566 /* Enable PCH Display Port */ 567 writew(0x0010, RCB_REG(DISPBDF)); 568 setbits_le32(RCB_REG(FD2), PCH_ENABLE_DBDF); 569 } 570 571 static const struct udevice_id bd82x6x_lpc_ids[] = { 572 { .compatible = "intel,bd82x6x-lpc" }, 573 { } 574 }; 575 576 U_BOOT_DRIVER(bd82x6x_lpc_drv) = { 577 .name = "lpc", 578 .id = UCLASS_LPC, 579 .of_match = bd82x6x_lpc_ids, 580 }; 581