1menu "Command line interface" 2 3config CMDLINE 4 bool "Support U-Boot commands" 5 default y 6 help 7 Enable U-Boot's command-line functions. This provides a means 8 to enter commands into U-Boot for a wide variety of purposes. It 9 also allows scripts (containing commands) to be executed. 10 Various commands and command categorys can be indivdually enabled. 11 Depending on the number of commands enabled, this can add 12 substantially to the size of U-Boot. 13 14config HUSH_PARSER 15 bool "Use hush shell" 16 depends on CMDLINE 17 help 18 This option enables the "hush" shell (from Busybox) as command line 19 interpreter, thus enabling powerful command line syntax like 20 if...then...else...fi conditionals or `&&' and '||' 21 constructs ("shell scripts"). 22 23 If disabled, you get the old, much simpler behaviour with a somewhat 24 smaller memory footprint. 25 26config SYS_PROMPT 27 string "Shell prompt" 28 default "=> " 29 help 30 This string is displayed in the command line to the left of the 31 cursor. 32 33menu "Autoboot options" 34 35config AUTOBOOT 36 bool "Autoboot" 37 default y 38 help 39 This enables the autoboot. See doc/README.autoboot for detail. 40 41config AUTOBOOT_KEYED 42 bool "Stop autobooting via specific input key / string" 43 default n 44 help 45 This option enables stopping (aborting) of the automatic 46 boot feature only by issuing a specific input key or 47 string. If not enabled, any input key will abort the 48 U-Boot automatic booting process and bring the device 49 to the U-Boot prompt for user input. 50 51config AUTOBOOT_PROMPT 52 string "Autoboot stop prompt" 53 depends on AUTOBOOT_KEYED 54 default "Autoboot in %d seconds\\n" 55 help 56 This string is displayed before the boot delay selected by 57 CONFIG_BOOTDELAY starts. If it is not defined there is no 58 output indicating that autoboot is in progress. 59 60 Note that this define is used as the (only) argument to a 61 printf() call, so it may contain '%' format specifications, 62 provided that it also includes, sepearated by commas exactly 63 like in a printf statement, the required arguments. It is 64 the responsibility of the user to select only such arguments 65 that are valid in the given context. 66 67config AUTOBOOT_ENCRYPTION 68 bool "Enable encryption in autoboot stopping" 69 depends on AUTOBOOT_KEYED 70 default n 71 72config AUTOBOOT_DELAY_STR 73 string "Delay autobooting via specific input key / string" 74 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION 75 help 76 This option delays the automatic boot feature by issuing 77 a specific input key or string. If CONFIG_AUTOBOOT_DELAY_STR 78 or the environment variable "bootdelaykey" is specified 79 and this string is received from console input before 80 autoboot starts booting, U-Boot gives a command prompt. The 81 U-Boot prompt will time out if CONFIG_BOOT_RETRY_TIME is 82 used, otherwise it never times out. 83 84config AUTOBOOT_STOP_STR 85 string "Stop autobooting via specific input key / string" 86 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION 87 help 88 This option enables stopping (aborting) of the automatic 89 boot feature only by issuing a specific input key or 90 string. If CONFIG_AUTOBOOT_STOP_STR or the environment 91 variable "bootstopkey" is specified and this string is 92 received from console input before autoboot starts booting, 93 U-Boot gives a command prompt. The U-Boot prompt never 94 times out, even if CONFIG_BOOT_RETRY_TIME is used. 95 96config AUTOBOOT_KEYED_CTRLC 97 bool "Enable Ctrl-C autoboot interruption" 98 depends on AUTOBOOT_KEYED && !AUTOBOOT_ENCRYPTION 99 default n 100 help 101 This option allows for the boot sequence to be interrupted 102 by ctrl-c, in addition to the "bootdelaykey" and "bootstopkey". 103 Setting this variable provides an escape sequence from the 104 limited "password" strings. 105 106config AUTOBOOT_STOP_STR_SHA256 107 string "Stop autobooting via SHA256 encrypted password" 108 depends on AUTOBOOT_KEYED && AUTOBOOT_ENCRYPTION 109 help 110 This option adds the feature to only stop the autobooting, 111 and therefore boot into the U-Boot prompt, when the input 112 string / password matches a values that is encypted via 113 a SHA256 hash and saved in the environment. 114 115endmenu 116 117source "cmd/fastboot/Kconfig" 118 119config BUILD_BIN2C 120 bool 121 122comment "Commands" 123 124menu "Info commands" 125 126config CMD_BDI 127 bool "bdinfo" 128 default y 129 help 130 Print board info 131 132config CMD_CONFIG 133 bool "config" 134 select BUILD_BIN2C 135 default SANDBOX 136 help 137 Print ".config" contents. 138 139 If this option is enabled, the ".config" file contents are embedded 140 in the U-Boot image and can be printed on the console by the "config" 141 command. This provides information of which options are enabled on 142 the running U-Boot. 143 144config CMD_CONSOLE 145 bool "coninfo" 146 default y 147 help 148 Print console devices and information. 149 150config CMD_CPU 151 bool "cpu" 152 help 153 Print information about available CPUs. This normally shows the 154 number of CPUs, type (e.g. manufacturer, architecture, product or 155 internal name) and clock frequency. Other information may be 156 available depending on the CPU driver. 157 158config CMD_LICENSE 159 bool "license" 160 select BUILD_BIN2C 161 help 162 Print GPL license text 163 164config CMD_REGINFO 165 bool "reginfo" 166 depends on PPC 167 help 168 Register dump 169 170endmenu 171 172menu "Boot commands" 173 174config CMD_BOOTD 175 bool "bootd" 176 default y 177 help 178 Run the command stored in the environment "bootcmd", i.e. 179 "bootd" does the same thing as "run bootcmd". 180 181config CMD_BOOTM 182 bool "bootm" 183 default y 184 help 185 Boot an application image from the memory. 186 187config CMD_BOOTZ 188 bool "bootz" 189 help 190 Boot the Linux zImage 191 192config CMD_BOOTI 193 bool "booti" 194 depends on ARM64 195 default y 196 help 197 Boot an AArch64 Linux Kernel image from memory. 198 199config CMD_BOOTEFI 200 bool "bootefi" 201 depends on EFI_LOADER 202 default y 203 help 204 Boot an EFI image from memory. 205 206config CMD_BOOTEFI_HELLO_COMPILE 207 bool "Compile a standard EFI hello world binary for testing" 208 depends on CMD_BOOTEFI && (ARM || X86) 209 default y 210 help 211 This compiles a standard EFI hello world application with U-Boot so 212 that it can be used with the test/py testing framework. This is useful 213 for testing that EFI is working at a basic level, and for bringing 214 up EFI support on a new architecture. 215 216 No additional space will be required in the resulting U-Boot binary 217 when this option is enabled. 218 219config CMD_BOOTEFI_HELLO 220 bool "Allow booting a standard EFI hello world for testing" 221 depends on CMD_BOOTEFI_HELLO_COMPILE 222 help 223 This adds a standard EFI hello world application to U-Boot so that 224 it can be used with the 'bootefi hello' command. This is useful 225 for testing that EFI is working at a basic level, and for bringing 226 up EFI support on a new architecture. 227 228config CMD_BOOTMENU 229 bool "bootmenu" 230 select MENU 231 help 232 Add an ANSI terminal boot menu command. 233 234config CMD_DTIMG 235 bool "dtimg" 236 select OF_LIBFDT_OVERLAY 237 help 238 Android DTB/DTBO image manipulation commands. Read dtb/dtbo files from 239 image into RAM, dump image structure information, etc. Those dtb/dtbo 240 files should be merged in one dtb further, which needs to be passed to 241 the kernel, as part of a boot process. 242 243config CMD_ELF 244 bool "bootelf, bootvx" 245 default y 246 help 247 Boot an ELF/vxWorks image from the memory. 248 249config CMD_FDT 250 bool "Flattened Device Tree utility commands" 251 default y 252 depends on OF_LIBFDT 253 help 254 Do FDT related setup before booting into the Operating System. 255 256config CMD_GO 257 bool "go" 258 default y 259 help 260 Start an application at a given address. 261 262config CMD_RUN 263 bool "run" 264 default y 265 help 266 Run the command in the given environment variable. 267 268config CMD_IMI 269 bool "iminfo" 270 default y 271 help 272 Print header information for application image. 273 274config CMD_IMLS 275 bool "imls" 276 default y 277 help 278 List all images found in flash 279 280config CMD_XIMG 281 bool "imxtract" 282 default y 283 help 284 Extract a part of a multi-image. 285 286config CMD_POWEROFF 287 bool "poweroff" 288 help 289 Poweroff/Shutdown the system 290 291config CMD_SPL 292 bool "spl export - Export boot information for Falcon boot" 293 depends on SPL 294 help 295 Falcon mode allows booting directly from SPL into an Operating 296 System such as Linux, thus skipping U-Boot proper. See 297 doc/README.falcon for full information about how to use this 298 command. 299 300config CMD_SPL_NAND_OFS 301 hex "Offset of OS command line args for Falcon-mode NAND boot" 302 depends on CMD_SPL 303 default 0 304 help 305 This provides the offset of the command line arguments for Linux 306 when booting from NAND in Falcon mode. See doc/README.falcon 307 for full information about how to use this option (and also see 308 board/gateworks/gw_ventana/README for an example). 309 310config CMD_SPL_WRITE_SIZE 311 hex "Size of argument area" 312 depends on CMD_SPL 313 default 0x2000 314 help 315 This provides the size of the command-line argument area in NAND 316 flash used by Falcon-mode boot. See the documentation until CMD_SPL 317 for detail. 318 319config CMD_THOR_DOWNLOAD 320 bool "thor - TIZEN 'thor' download" 321 help 322 Implements the 'thor' download protocol. This is a way of 323 downloading a software update over USB from an attached host. 324 There is no documentation about this within the U-Boot source code 325 but you should be able to find something on the interwebs. 326 327config CMD_ZBOOT 328 bool "zboot - x86 boot command" 329 help 330 With x86 machines it is common to boot a bzImage file which 331 contains both a kernel and a setup.bin file. The latter includes 332 configuration information from the dark ages which x86 boards still 333 need to pick things out of. 334 335 Consider using FIT in preference to this since it supports directly 336 booting both 32- and 64-bit kernels, as well as secure boot. 337 Documentation is available in doc/uImage.FIT/x86-fit-boot.txt 338 339endmenu 340 341menu "Environment commands" 342 343config CMD_ASKENV 344 bool "ask for env variable" 345 help 346 Ask for environment variable 347 348config CMD_EXPORTENV 349 bool "env export" 350 default y 351 help 352 Export environments. 353 354config CMD_IMPORTENV 355 bool "env import" 356 default y 357 help 358 Import environments. 359 360config CMD_EDITENV 361 bool "editenv" 362 default y 363 help 364 Edit environment variable. 365 366config CMD_GREPENV 367 bool "search env" 368 help 369 Allow for searching environment variables 370 371config CMD_SAVEENV 372 bool "saveenv" 373 default y 374 help 375 Save all environment variables into the compiled-in persistent 376 storage. 377 378config CMD_ENV_EXISTS 379 bool "env exists" 380 default y 381 help 382 Check if a variable is defined in the environment for use in 383 shell scripting. 384 385config CMD_ENV_CALLBACK 386 bool "env callbacks - print callbacks and their associated variables" 387 help 388 Some environment variable have callbacks defined by 389 U_BOOT_ENV_CALLBACK. These are called when the variable changes. 390 For example changing "baudrate" adjust the serial baud rate. This 391 command lists the currently defined callbacks. 392 393config CMD_ENV_FLAGS 394 bool "env flags -print variables that have non-default flags" 395 help 396 Some environment variables have special flags that control their 397 behaviour. For example, serial# can only be written once and cannot 398 be deleted. This command shows the variables that have special 399 flags. 400 401endmenu 402 403menu "Memory commands" 404 405config CMD_CRC32 406 bool "crc32" 407 select HASH 408 default y 409 help 410 Compute CRC32. 411 412config CRC32_VERIFY 413 bool "crc32 -v" 414 depends on CMD_CRC32 415 help 416 Add -v option to verify data against a crc32 checksum. 417 418config CMD_EEPROM 419 bool "eeprom - EEPROM subsystem" 420 help 421 (deprecated, needs conversion to driver model) 422 Provides commands to read and write EEPROM (Electrically Erasable 423 Programmable Read Only Memory) chips that are connected over an 424 I2C bus. 425 426config CMD_EEPROM_LAYOUT 427 bool "Enable layout-aware eeprom commands" 428 depends on CMD_EEPROM 429 help 430 (deprecated, needs conversion to driver model) 431 When enabled, additional eeprom sub-commands become available. 432 433 eeprom print - prints the contents of the eeprom in a human-readable 434 way (eeprom layout fields, and data formatted to be fit for human 435 consumption). 436 437 eeprom update - allows user to update eeprom fields by specifying 438 the field name, and providing the new data in a human readable format 439 (same format as displayed by the eeprom print command). 440 441 Both commands can either auto detect the layout, or be told which 442 layout to use. 443 444 Feature API: 445 __weak int parse_layout_version(char *str) 446 - override to provide your own layout name parsing 447 __weak void __eeprom_layout_assign(struct eeprom_layout *layout, 448 int layout_version); 449 - override to setup the layout metadata based on the version 450 __weak int eeprom_layout_detect(unsigned char *data) 451 - override to provide your own algorithm for detecting layout 452 version 453 eeprom_field.c 454 - contains various printing and updating functions for common 455 types of eeprom fields. Can be used for defining 456 custom layouts. 457 458config EEPROM_LAYOUT_HELP_STRING 459 string "Tells user what layout names are supported" 460 depends on CMD_EEPROM_LAYOUT 461 default "<not defined>" 462 help 463 Help printed with the LAYOUT VERSIONS part of the 'eeprom' 464 command's help. 465 466config LOOPW 467 bool "loopw" 468 help 469 Infinite write loop on address range 470 471config CMD_MD5SUM 472 bool "md5sum" 473 default n 474 select MD5 475 help 476 Compute MD5 checksum. 477 478config MD5SUM_VERIFY 479 bool "md5sum -v" 480 default n 481 depends on CMD_MD5SUM 482 help 483 Add -v option to verify data against an MD5 checksum. 484 485config CMD_MEMINFO 486 bool "meminfo" 487 help 488 Display memory information. 489 490config CMD_MEMORY 491 bool "md, mm, nm, mw, cp, cmp, base, loop" 492 default y 493 help 494 Memory commands. 495 md - memory display 496 mm - memory modify (auto-incrementing address) 497 nm - memory modify (constant address) 498 mw - memory write (fill) 499 cp - memory copy 500 cmp - memory compare 501 base - print or set address offset 502 loop - initialize loop on address range 503 504config CMD_MEMTEST 505 bool "memtest" 506 help 507 Simple RAM read/write test. 508 509config CMD_MX_CYCLIC 510 bool "mdc, mwc" 511 help 512 mdc - memory display cyclic 513 mwc - memory write cyclic 514 515config CMD_SHA1SUM 516 bool "sha1sum" 517 select SHA1 518 help 519 Compute SHA1 checksum. 520 521config SHA1SUM_VERIFY 522 bool "sha1sum -v" 523 depends on CMD_SHA1SUM 524 help 525 Add -v option to verify data against a SHA1 checksum. 526 527config CMD_STRINGS 528 bool "strings - display strings in memory" 529 help 530 This works similarly to the Unix 'strings' command except that it 531 works with a memory range. String of printable characters found 532 within the range are displayed. The minimum number of characters 533 for a sequence to be considered a string can be provided. 534 535endmenu 536 537menu "Compression commands" 538 539config CMD_LZMADEC 540 bool "lzmadec" 541 default y if CMD_BOOTI 542 select LZMA 543 help 544 Support decompressing an LZMA (Lempel-Ziv-Markov chain algorithm) 545 image from memory. 546 547config CMD_UNZIP 548 bool "unzip" 549 default y if CMD_BOOTI 550 help 551 Uncompress a zip-compressed memory region. 552 553config CMD_ZIP 554 bool "zip" 555 help 556 Compress a memory region with zlib deflate method. 557 558endmenu 559 560menu "Device access commands" 561 562config CMD_ARMFLASH 563 #depends on FLASH_CFI_DRIVER 564 bool "armflash" 565 help 566 ARM Ltd reference designs flash partition access 567 568config CMD_CLK 569 bool "clk - Show clock frequencies" 570 help 571 (deprecated) 572 Shows clock frequences by calling a sock_clk_dump() hook function. 573 This is depreated in favour of using the CLK uclass and accessing 574 clock values from associated drivers. However currently no command 575 exists for this. 576 577config CMD_DEMO 578 bool "demo - Demonstration commands for driver model" 579 depends on DM 580 help 581 Provides a 'demo' command which can be used to play around with 582 driver model. To use this properly you will need to enable one or 583 both of the demo devices (DM_DEMO_SHAPE and DM_DEMO_SIMPLE). 584 Otherwise you will always get an empty list of devices. The demo 585 devices are defined in the sandbox device tree, so the easiest 586 option is to use sandbox and pass the -d point to sandbox's 587 u-boot.dtb file. 588 589config CMD_DFU 590 bool "dfu" 591 select USB_FUNCTION_DFU 592 help 593 Enables the command "dfu" which is used to have U-Boot create a DFU 594 class device via USB. This command requires that the "dfu_alt_info" 595 environment variable be set and define the alt settings to expose to 596 the host. 597 598config CMD_DM 599 bool "dm - Access to driver model information" 600 depends on DM 601 default y 602 help 603 Provides access to driver model data structures and information, 604 such as a list of devices, list of uclasses and the state of each 605 device (e.g. activated). This is not required for operation, but 606 can be useful to see the state of driver model for debugging or 607 interest. 608 609config CMD_FDC 610 bool "fdcboot - Boot from floppy device" 611 help 612 The 'fdtboot' command allows booting an image from a floppy disk. 613 614config CMD_FLASH 615 bool "flinfo, erase, protect" 616 default y 617 help 618 NOR flash support. 619 flinfo - print FLASH memory information 620 erase - FLASH memory 621 protect - enable or disable FLASH write protection 622 623config CMD_FPGA 624 bool "fpga" 625 default y 626 help 627 FPGA support. 628 629config CMD_FPGA_LOADBP 630 bool "fpga loadbp - load partial bitstream (Xilinx only)" 631 depends on CMD_FPGA 632 help 633 Supports loading an FPGA device from a bitstream buffer containing 634 a partial bitstream. 635 636config CMD_FPGA_LOADFS 637 bool "fpga loadfs - load bitstream from FAT filesystem (Xilinx only)" 638 depends on CMD_FPGA 639 help 640 Supports loading an FPGA device from a FAT filesystem. 641 642config CMD_FPGA_LOADMK 643 bool "fpga loadmk - load bitstream from image" 644 depends on CMD_FPGA 645 help 646 Supports loading an FPGA device from a image generated by mkimage. 647 648config CMD_FPGA_LOADP 649 bool "fpga loadp - load partial bitstream" 650 depends on CMD_FPGA 651 help 652 Supports loading an FPGA device from a bitstream buffer containing 653 a partial bitstream. 654 655config CMD_FPGAD 656 bool "fpgad - dump FPGA registers" 657 help 658 (legacy, needs conversion to driver model) 659 Provides a way to dump FPGA registers by calling the board-specific 660 fpga_get_reg() function. This functions similarly to the 'md' 661 command. 662 663config CMD_FUSE 664 bool "fuse - support for the fuse subssystem" 665 help 666 (deprecated - needs conversion to driver model) 667 This allows reading, sensing, programming or overriding fuses 668 which control the behaviour of the device. The command uses the 669 fuse_...() API. 670 671config CMD_GPIO 672 bool "gpio" 673 help 674 GPIO support. 675 676config CMD_GPT 677 bool "GPT (GUID Partition Table) command" 678 select PARTITION_UUIDS 679 select EFI_PARTITION 680 imply RANDOM_UUID 681 help 682 Enable the 'gpt' command to ready and write GPT style partition 683 tables. 684 685config RANDOM_UUID 686 bool "GPT Random UUID generation" 687 help 688 Enable the generation of partitions with random UUIDs if none 689 are provided. 690 691config CMD_GPT_RENAME 692 bool "GPT partition renaming commands" 693 depends on CMD_GPT 694 help 695 Enables the 'gpt' command to interchange names on two GPT 696 partitions via the 'gpt swap' command or to rename single 697 partitions via the 'rename' command. 698 699config CMD_IDE 700 bool "ide - Support for IDE drivers" 701 select IDE 702 help 703 Provides an 'ide' command which allows accessing the IDE drive, 704 reseting the IDE interface, printing the partition table and 705 geting device info. It also enables the 'diskboot' command which 706 permits booting from an IDE drive. 707 708config CMD_IO 709 bool "io - Support for performing I/O accesses" 710 help 711 Provides an 'iod' command to display I/O space and an 'iow' command 712 to write values to the I/O space. This can be useful for manually 713 checking the state of devices during boot when debugging device 714 drivers, etc. 715 716config CMD_IOTRACE 717 bool "iotrace - Support for tracing I/O activity" 718 help 719 Provides an 'iotrace' command which supports recording I/O reads and 720 writes in a trace buffer in memory . It also maintains a checksum 721 of the trace records (even if space is exhausted) so that the 722 sequence of I/O accesses can be verified. 723 724 When debugging drivers it is useful to see what I/O accesses were 725 done and in what order. 726 727 Even if the individual accesses are of little interest it can be 728 useful to verify that the access pattern is consistent each time 729 an operation is performed. In this case a checksum can be used to 730 characterise the operation of a driver. The checksum can be compared 731 across different runs of the operation to verify that the driver is 732 working properly. 733 734 In particular, when performing major refactoring of the driver, where 735 the access pattern should not change, the checksum provides assurance 736 that the refactoring work has not broken the driver. 737 738 This works by sneaking into the io.h heder for an architecture and 739 redirecting I/O accesses through iotrace's tracing mechanism. 740 741 For now no commands are provided to examine the trace buffer. The 742 format is fairly simple, so 'md' is a reasonable substitute. 743 744 Note: The checksum feature is only useful for I/O regions where the 745 contents do not change outside of software control. Where this is not 746 suitable you can fall back to manually comparing the addresses. It 747 might be useful to enhance tracing to only checksum the accesses and 748 not the data read/written. 749 750config CMD_I2C 751 bool "i2c" 752 help 753 I2C support. 754 755config CMD_LOADB 756 bool "loadb" 757 default y 758 help 759 Load a binary file over serial line. 760 761config CMD_LOADS 762 bool "loads" 763 default y 764 help 765 Load an S-Record file over serial line 766 767config CMD_LOAD_ANDROID 768 bool "load_android" 769 default n 770 depends on ANDROID_BOOT_IMAGE 771 help 772 Load an Android Boot image from storage. The Android Boot images 773 define the size and kernel address on the header, which are used by 774 this command. 775 776config CMD_BOOT_ANDROID 777 bool "boot_android" 778 default n 779 depends on ANDROID_BOOTLOADER 780 help 781 Performs the Android Bootloader boot flow, loading the appropriate 782 Android image (normal kernel, recovery kernel or "bootloader" mode) 783 and booting it. The boot mode is determined by the contents of the 784 Android Bootloader Message. 785 786config CMD_ANDROID_AB_SELECT 787 bool "android_ab_select" 788 default n 789 depends on ANDROID_AB 790 help 791 On Android devices with more than one boot slot (multiple copies of 792 the kernel and system images) this provides a command to select which 793 slot should be used to boot from and register the boot attempt. This 794 is used by the new A/B update model where one slot is updated in the 795 background while running from the other slot. 796 797config CMD_BOOT_ROCKCHIP 798 bool "boot_rockchip" 799 default n 800 depends on RKIMG_BOOTLOADER 801 help 802 Performs the Rockchip Bootloader boot flow, loading the appropriate 803 Rockchip image (normal kernel, boot, resource and revocery) 804 and booting it. The boot mode is determined by the contents of the 805 Rockchip bootloader helper. 806 807config CMD_MMC 808 bool "mmc" 809 help 810 MMC memory mapped support. 811 812config CMD_NAND 813 bool "nand" 814 default y if NAND_SUNXI 815 help 816 NAND support. 817 818if CMD_NAND 819config CMD_NAND_TRIMFFS 820 bool "nand write.trimffs" 821 default y if ARCH_SUNXI 822 help 823 Allows one to skip empty pages when flashing something on a NAND. 824 825config CMD_NAND_LOCK_UNLOCK 826 bool "nand lock/unlock" 827 help 828 NAND locking support. 829 830config CMD_NAND_TORTURE 831 bool "nand torture" 832 help 833 NAND torture support. 834 835endif # CMD_NAND 836 837config CMD_NVME 838 bool "nvme" 839 depends on NVME 840 default y if NVME 841 help 842 NVM Express device support 843 844config CMD_MMC_SPI 845 bool "mmc_spi - Set up MMC SPI device" 846 help 847 Provides a way to set up an MMC (Multimedia Card) SPI (Serial 848 Peripheral Interface) device. The device provides a means of 849 accessing an MMC device via SPI using a single data line, limited 850 to 20MHz. It is useful since it reduces the amount of protocol code 851 required. 852 853config CMD_ONENAND 854 bool "onenand - access to onenand device" 855 help 856 OneNAND is a brand of NAND ('Not AND' gate) flash which provides 857 various useful features. This command allows reading, writing, 858 and erasing blocks. It allso provides a way to show and change 859 bad blocks, and test the device. 860 861config CMD_PART 862 bool "part" 863 select PARTITION_UUIDS 864 help 865 Read and display information about the partition table on 866 various media. 867 868config CMD_PCI 869 bool "pci - Access PCI devices" 870 help 871 Provide access to PCI (Peripheral Interconnect Bus), a type of bus 872 used on some devices to allow the CPU to communicate with its 873 peripherals. Sub-commands allow bus enumeration, displaying and 874 changing configuration space and a few other features. 875 876config CMD_PCMCIA 877 bool "pinit - Set up PCMCIA device" 878 help 879 Provides a means to initialise a PCMCIA (Personal Computer Memory 880 Card International Association) device. This is an old standard from 881 about 1990. These devices are typically removable memory or network 882 cards using a standard 68-pin connector. 883 884config CMD_READ 885 bool "read - Read binary data from a partition" 886 help 887 Provides low-level access to the data in a partition. 888 889config CMD_REMOTEPROC 890 bool "remoteproc" 891 depends on REMOTEPROC 892 help 893 Support for Remote Processor control 894 895config CMD_ROCKUSB 896 bool "rockusb - Command to upgrade Rockchip device" 897 depends on USB_GADGET 898 help 899 Rockusb command provides a way to upgrade firmware for 900 Rockchip SoC based devices, its design make use of USB 901 Bulk-Only Transport based on UMS framework. 902 903config CMD_RKNAND 904 bool "rknand" 905 depends on (RKNAND || RKNANDC_NAND) 906 default y if (RKNAND || RKNANDC_NAND) 907 help 908 Rockchip NAND FLASH device support 909 910config CMD_RKSFC 911 bool "rksfc" 912 depends on (RKSFC_NOR || RKSFC_NAND) 913 default y if (RKSFC_NOR || RKSFC_NAND) 914 help 915 Rockchip SFC device support 916 917config CMD_SATA 918 bool "sata - Access SATA subsystem" 919 select SATA 920 help 921 SATA (Serial Advanced Technology Attachment) is a serial bus 922 standard for connecting to hard drives and other storage devices. 923 This command provides information about attached devices and allows 924 reading, writing and other operations. 925 926 SATA replaces PATA (originally just ATA), which stands for Parallel AT 927 Attachment, where AT refers to an IBM AT (Advanced Technology) 928 computer released in 1984. 929 930config CMD_SAVES 931 bool "saves - Save a file over serial in S-Record format" 932 help 933 Provides a way to save a binary file using the Motorola S-Record 934 format over the serial line. 935 936config CMD_SDRAM 937 bool "sdram - Print SDRAM configuration information" 938 help 939 Provides information about attached SDRAM. This assumed that the 940 SDRAM has an EEPROM with information that can be read using the 941 I2C bus. This is only available on some boards. 942 943config CMD_SF 944 bool "sf" 945 help 946 SPI Flash support 947 948config CMD_SF_TEST 949 bool "sf test - Allow testing of SPI flash" 950 help 951 Provides a way to test that SPI flash is working correctly. The 952 test is destructive, in that an area of SPI flash must be provided 953 for the test to use. Performance information is also provided, 954 measuring the performance of reading, writing and erasing in 955 Mbps (Million Bits Per Second). This value should approximately 956 equal the SPI bus speed for a single-bit-wide SPI bus, assuming 957 everything is working properly. 958 959config CMD_SPI 960 bool "sspi" 961 help 962 SPI utility command. 963 964config CMD_TSI148 965 bool "tsi148 - Command to access tsi148 device" 966 help 967 This provides various sub-commands to initialise and configure the 968 Turndra tsi148 device. See the command help for full details. 969 970config CMD_UNIVERSE 971 bool "universe - Command to set up the Turndra Universe controller" 972 help 973 This allows setting up the VMEbus provided by this controller. 974 See the command help for full details. 975 976config CMD_USB 977 bool "usb" 978 help 979 USB support. 980 981config CMD_USB_SDP 982 bool "sdp" 983 select USB_FUNCTION_SDP 984 help 985 Enables the command "sdp" which is used to have U-Boot emulating the 986 Serial Download Protocol (SDP) via USB. 987 988config CMD_USB_MASS_STORAGE 989 bool "UMS usb mass storage" 990 help 991 USB mass storage support 992 993endmenu 994 995 996menu "Shell scripting commands" 997 998config CMD_ECHO 999 bool "echo" 1000 default y 1001 help 1002 Echo args to console 1003 1004config CMD_ITEST 1005 bool "itest" 1006 default y 1007 help 1008 Return true/false on integer compare. 1009 1010config CMD_SOURCE 1011 bool "source" 1012 default y 1013 help 1014 Run script from memory 1015 1016config CMD_SETEXPR 1017 bool "setexpr" 1018 default y 1019 help 1020 Evaluate boolean and math expressions and store the result in an env 1021 variable. 1022 Also supports loading the value at a memory location into a variable. 1023 If CONFIG_REGEX is enabled, setexpr also supports a gsub function. 1024 1025endmenu 1026 1027menu "Network commands" 1028 1029config CMD_NET 1030 bool "bootp, tftpboot" 1031 select NET 1032 default y 1033 help 1034 Network commands. 1035 bootp - boot image via network using BOOTP/TFTP protocol 1036 tftpboot - boot image via network using TFTP protocol 1037 1038config CMD_TFTPPUT 1039 bool "tftp put" 1040 help 1041 TFTP put command, for uploading files to a server 1042 1043config CMD_TFTPSRV 1044 bool "tftpsrv" 1045 help 1046 Act as a TFTP server and boot the first received file 1047 1048config CMD_RARP 1049 bool "rarpboot" 1050 help 1051 Boot image via network using RARP/TFTP protocol 1052 1053config CMD_DHCP 1054 bool "dhcp" 1055 help 1056 Boot image via network using DHCP/TFTP protocol 1057 1058config CMD_PXE 1059 bool "pxe" 1060 select MENU 1061 help 1062 Boot image via network using PXE protocol 1063 1064config CMD_NFS 1065 bool "nfs" 1066 default y 1067 help 1068 Boot image via network using NFS protocol. 1069 1070config CMD_MII 1071 bool "mii" 1072 help 1073 Enable MII utility commands. 1074 1075config CMD_PING 1076 bool "ping" 1077 help 1078 Send ICMP ECHO_REQUEST to network host 1079 1080config CMD_CDP 1081 bool "cdp" 1082 help 1083 Perform CDP network configuration 1084 1085config CMD_SNTP 1086 bool "sntp" 1087 help 1088 Synchronize RTC via network 1089 1090config CMD_DNS 1091 bool "dns" 1092 help 1093 Lookup the IP of a hostname 1094 1095config CMD_LINK_LOCAL 1096 bool "linklocal" 1097 help 1098 Acquire a network IP address using the link-local protocol 1099 1100config CMD_ETHSW 1101 bool "ethsw" 1102 help 1103 Allow control of L2 Ethernet switch commands. These are supported 1104 by the vsc9953 Ethernet driver at present. Sub-commands allow 1105 operations such as enabling / disabling a port and 1106 viewing/maintaining the filtering database (FDB) 1107 1108endmenu 1109 1110config CMD_MEMTESTER 1111 bool "Enable memtester for ddr" 1112 help 1113 This enables memtester for ddr. 1114 1115config CMD_DDR_TEST_TOOL 1116 bool "Enable ddr test tool" 1117 help 1118 This enable ddr test tool code. 1119 1120menu "Misc commands" 1121 1122config CMD_BMP 1123 bool "Enable 'bmp' command" 1124 depends on LCD || DM_VIDEO || VIDEO 1125 help 1126 This provides a way to obtain information about a BMP-format iamge 1127 and to display it. BMP (which presumably stands for BitMaP) is a 1128 file format defined by Microsoft which supports images of various 1129 depths, formats and compression methods. Headers on the file 1130 determine the formats used. This command can be used by first loading 1131 the image into RAM, then using this command to look at it or display 1132 it. 1133 1134config CMD_BSP 1135 bool "Enable board-specific commands" 1136 help 1137 (deprecated: instead, please define a Kconfig option for each command) 1138 1139 Some boards have board-specific commands which are only enabled 1140 during developemnt and need to be turned off for production. This 1141 option provides a way to control this. The commands that are enabled 1142 vary depending on the board. 1143 1144config CMD_BKOPS_ENABLE 1145 bool "mmc bkops enable" 1146 depends on CMD_MMC 1147 default n 1148 help 1149 Enable command for setting manual background operations handshake 1150 on a eMMC device. The feature is optionally available on eMMC devices 1151 conforming to standard >= 4.41. 1152 1153config CMD_BLOCK_CACHE 1154 bool "blkcache - control and stats for block cache" 1155 depends on BLOCK_CACHE 1156 default y if BLOCK_CACHE 1157 help 1158 Enable the blkcache command, which can be used to control the 1159 operation of the cache functions. 1160 This is most useful when fine-tuning the operation of the cache 1161 during development, but also allows the cache to be disabled when 1162 it might hurt performance (e.g. when using the ums command). 1163 1164config CMD_CACHE 1165 bool "icache or dcache" 1166 help 1167 Enable the "icache" and "dcache" commands 1168 1169config CMD_DISPLAY 1170 bool "Enable the 'display' command, for character displays" 1171 help 1172 (this needs porting to driver model) 1173 This enables the 'display' command which allows a string to be 1174 displayed on a simple board-specific display. Implement 1175 display_putc() to use it. 1176 1177config CMD_LED 1178 bool "led" 1179 default y if LED 1180 help 1181 Enable the 'led' command which allows for control of LEDs supported 1182 by the board. The LEDs can be listed with 'led list' and controlled 1183 with led on/off/togle/blink. Any LED drivers can be controlled with 1184 this command, e.g. led_gpio. 1185 1186config CMD_DATE 1187 bool "date" 1188 default y if DM_RTC 1189 help 1190 Enable the 'date' command for getting/setting the time/date in RTC 1191 devices. 1192 1193config CMD_TIME 1194 bool "time" 1195 help 1196 Run commands and summarize execution time. 1197 1198config CMD_GETTIME 1199 bool "gettime - read elapsed time" 1200 help 1201 Enable the 'gettime' command which reads the elapsed time since 1202 U-Boot started running. This shows the time in seconds and 1203 milliseconds. See also the 'bootstage' command which provides more 1204 flexibility for boot timing. 1205 1206# TODO: rename to CMD_SLEEP 1207config CMD_MISC 1208 bool "sleep" 1209 default y 1210 help 1211 Delay execution for some time 1212 1213config CMD_TIMER 1214 bool "timer" 1215 help 1216 Access the system timer. 1217 1218config CMD_SOUND 1219 bool "sound" 1220 depends on SOUND 1221 help 1222 This provides basic access to the U-Boot's sound support. The main 1223 feature is to play a beep. 1224 1225 sound init - set up sound system 1226 sound play - play a sound 1227 1228config CMD_QFW 1229 bool "qfw" 1230 select QFW 1231 help 1232 This provides access to the QEMU firmware interface. The main 1233 feature is to allow easy loading of files passed to qemu-system 1234 via -kernel / -initrd 1235 1236source "cmd/mvebu/Kconfig" 1237 1238config CMD_TERMINAL 1239 bool "terminal - provides a way to attach a serial terminal" 1240 help 1241 Provides a 'cu'-like serial terminal command. This can be used to 1242 access other serial ports from the system console. The terminal 1243 is very simple with no special processing of characters. As with 1244 cu, you can press ~. (tilde followed by period) to exit. 1245 1246config CMD_UUID 1247 bool "uuid, guid - generation of unique IDs" 1248 help 1249 This enables two commands: 1250 1251 uuid - generate random Universally Unique Identifier 1252 guid - generate Globally Unique Identifier based on random UUID 1253 1254 The two commands are very similar except for the endianness of the 1255 output. 1256 1257endmenu 1258 1259config CMD_BOOTSTAGE 1260 bool "Enable the 'bootstage' command" 1261 depends on BOOTSTAGE 1262 help 1263 Add a 'bootstage' command which supports printing a report 1264 and un/stashing of bootstage data. 1265 1266menu "Power commands" 1267config CMD_PMIC 1268 bool "Enable Driver Model PMIC command" 1269 depends on DM_PMIC 1270 help 1271 This is the pmic command, based on a driver model pmic's API. 1272 Command features are unchanged: 1273 - list - list pmic devices 1274 - pmic dev <id> - show or [set] operating pmic device (NEW) 1275 - pmic dump - dump registers 1276 - pmic read address - read byte of register at address 1277 - pmic write address - write byte to register at address 1278 The only one change for this command is 'dev' subcommand. 1279 1280config CMD_REGULATOR 1281 bool "Enable Driver Model REGULATOR command" 1282 depends on DM_REGULATOR 1283 help 1284 This command is based on driver model regulator's API. 1285 User interface features: 1286 - list - list regulator devices 1287 - regulator dev <id> - show or [set] operating regulator device 1288 - regulator info - print constraints info 1289 - regulator status - print operating status 1290 - regulator value <val] <-f> - print/[set] voltage value [uV] 1291 - regulator current <val> - print/[set] current value [uA] 1292 - regulator mode <id> - print/[set] operating mode id 1293 - regulator enable - enable the regulator output 1294 - regulator disable - disable the regulator output 1295 1296 The '-f' (force) option can be used for set the value which exceeds 1297 the limits, which are found in device-tree and are kept in regulator's 1298 uclass platdata structure. 1299 1300config CMD_CHARGE_DISPLAY 1301 bool "Enable Driver Model Charge Display command" 1302 depends on DM_CHARGE_DISPLAY 1303 default y 1304 help 1305 Support U-Boot charge display. 1306 1307config CMD_DVFS 1308 bool "Enable Driver Model DVFS command" 1309 depends on DM_DVFS 1310 default y 1311 help 1312 Support dvfs policy apply API 1313 User interface features: 1314 - dvfs - apply dvfs policy once 1315 - dvfs repeat - repeat apply dvfs policy until achieve the target temperature 1316 1317endmenu 1318 1319menu "Security commands" 1320config CMD_AES 1321 bool "Enable the 'aes' command" 1322 select AES 1323 help 1324 This provides a means to encrypt and decrypt data using the AES 1325 (Advanced Encryption Standard). This algorithm uses a symetric key 1326 and is widely used as a streaming cipher. Different key lengths are 1327 supported by the algorithm but this command only supports 128 bits 1328 at present. 1329 1330config CMD_BLOB 1331 bool "Enable the 'blob' command" 1332 help 1333 This is used with the Freescale secure boot mechanism. 1334 1335 Freescale's SEC block has built-in Blob Protocol which provides 1336 a method for protecting user-defined data across system power 1337 cycles. SEC block protects data in a data structure called a Blob, 1338 which provides both confidentiality and integrity protection. 1339 1340 Encapsulating data as a blob 1341 Each time that the Blob Protocol is used to protect data, a 1342 different randomly generated key is used to encrypt the data. 1343 This random key is itself encrypted using a key which is derived 1344 from SoC's non-volatile secret key and a 16 bit Key identifier. 1345 The resulting encrypted key along with encrypted data is called a 1346 blob. The non-volatile secure key is available for use only during 1347 secure boot. 1348 1349 During decapsulation, the reverse process is performed to get back 1350 the original data. 1351 1352 Sub-commands: 1353 blob enc - encapsulating data as a cryptgraphic blob 1354 blob dec - decapsulating cryptgraphic blob to get the data 1355 1356 Syntax: 1357 1358 blob enc src dst len km 1359 1360 Encapsulate and create blob of data $len bytes long 1361 at address $src and store the result at address $dst. 1362 $km is the 16 byte key modifier is also required for 1363 generation/use as key for cryptographic operation. Key 1364 modifier should be 16 byte long. 1365 1366 blob dec src dst len km 1367 1368 Decapsulate the blob of data at address $src and 1369 store result of $len byte at addr $dst. 1370 $km is the 16 byte key modifier is also required for 1371 generation/use as key for cryptographic operation. Key 1372 modifier should be 16 byte long. 1373 1374config CMD_HASH 1375 bool "Support 'hash' command" 1376 select HASH 1377 help 1378 This provides a way to hash data in memory using various supported 1379 algorithms (such as SHA1, MD5, CRC32). The computed digest can be 1380 saved to memory or to an environment variable. It is also possible 1381 to verify a hash against data in memory. 1382 1383config HASH_VERIFY 1384 bool "hash -v" 1385 depends on CMD_HASH 1386 help 1387 Add -v option to verify data against a hash. 1388 1389config CMD_TPM 1390 bool "Enable the 'tpm' command" 1391 depends on TPM 1392 help 1393 This provides a means to talk to a TPM from the command line. A wide 1394 range of commands if provided - see 'tpm help' for details. The 1395 command requires a suitable TPM on your board and the correct driver 1396 must be enabled. 1397 1398config CMD_TPM_TEST 1399 bool "Enable the 'tpm test' command" 1400 depends on CMD_TPM 1401 help 1402 This provides a a series of tests to confirm that the TPM is working 1403 correctly. The tests cover initialisation, non-volatile RAM, extend, 1404 global lock and checking that timing is within expectations. The 1405 tests pass correctly on Infineon TPMs but may need to be adjusted 1406 for other devices. 1407 1408endmenu 1409 1410menu "Firmware commands" 1411config CMD_CROS_EC 1412 bool "Enable crosec command" 1413 depends on CROS_EC 1414 default y 1415 help 1416 Enable command-line access to the Chrome OS EC (Embedded 1417 Controller). This provides the 'crosec' command which has 1418 a number of sub-commands for performing EC tasks such as 1419 updating its flash, accessing a small saved context area 1420 and talking to the I2C bus behind the EC (if there is one). 1421endmenu 1422 1423menu "Filesystem commands" 1424config CMD_CBFS 1425 bool "Enable the 'cbfs' command" 1426 depends on FS_CBFS 1427 help 1428 Define this to enable support for reading from a Coreboot 1429 filesystem. This is a ROM-based filesystem used for accessing files 1430 on systems that use coreboot as the first boot-loader and then load 1431 U-Boot to actually boot the Operating System. Available commands are 1432 cbfsinit, cbfsinfo, cbfsls and cbfsload. 1433 1434config CMD_CRAMFS 1435 bool "Enable the 'cramfs' command" 1436 depends on FS_CRAMFS 1437 help 1438 This provides commands for dealing with CRAMFS (Compressed ROM 1439 filesystem). CRAMFS is useful when space is tight since files are 1440 compressed. Two commands are provided: 1441 1442 cramfsls - lists files in a cramfs image 1443 cramfsload - loads a file from a cramfs image 1444 1445config CMD_EXT2 1446 bool "ext2 command support" 1447 help 1448 Enables EXT2 FS command 1449 1450config CMD_EXT4 1451 bool "ext4 command support" 1452 help 1453 Enables EXT4 FS command 1454 1455config CMD_EXT4_WRITE 1456 depends on CMD_EXT4 1457 bool "ext4 write command support" 1458 help 1459 Enables EXT4 FS write command 1460 1461config CMD_FAT 1462 bool "FAT command support" 1463 select FS_FAT 1464 help 1465 Support for the FAT fs 1466 1467config CMD_FS_GENERIC 1468 bool "filesystem commands" 1469 help 1470 Enables filesystem commands (e.g. load, ls) that work for multiple 1471 fs types. 1472 1473config CMD_FS_UUID 1474 bool "fsuuid command" 1475 help 1476 Enables fsuuid command for filesystem UUID. 1477 1478config CMD_JFFS2 1479 bool "jffs2 command" 1480 select FS_JFFS2 1481 help 1482 Enables commands to support the JFFS2 (Journalling Flash File System 1483 version 2) filesystem. This enables fsload, ls and fsinfo which 1484 provide the ability to load files, list directories and obtain 1485 filesystem information. 1486 1487config CMD_MTDPARTS 1488 bool "MTD partition support" 1489 help 1490 MTD partition support 1491 1492config MTDIDS_DEFAULT 1493 string "Default MTD IDs" 1494 depends on CMD_MTDPARTS 1495 help 1496 Defines a default MTD ID 1497 1498config MTDPARTS_DEFAULT 1499 string "Default MTD partition scheme" 1500 depends on CMD_MTDPARTS 1501 help 1502 Defines a default MTD partitioning scheme in the Linux MTD command 1503 line partitions format 1504 1505config CMD_MTDPARTS_SPREAD 1506 bool "Padd partition size to take account of bad blocks" 1507 depends on CMD_MTDPARTS 1508 help 1509 This enables the 'spread' sub-command of the mtdparts command. 1510 This command will modify the existing mtdparts variable by increasing 1511 the size of the partitions such that 1) each partition's net size is 1512 at least as large as the size specified in the mtdparts variable and 1513 2) each partition starts on a good block. 1514 1515config CMD_REISER 1516 bool "reiser - Access to reiserfs filesystems" 1517 help 1518 This provides two commands which operate on a resierfs filesystem, 1519 commonly used some years ago: 1520 1521 reiserls - list files 1522 reiserload - load a file 1523 1524config CMD_SCSI 1525 bool "scsi - Access to SCSI devices" 1526 default y if SCSI 1527 help 1528 This provides a 'scsi' command which provides access to SCSI (Small 1529 Computer System Interface) devices. The command provides a way to 1530 scan the bus, reset the bus, read and write data and get information 1531 about devices. 1532 1533config CMD_YAFFS2 1534 bool "yaffs2 - Access of YAFFS2 filesystem" 1535 depends on YAFFS2 1536 default y 1537 help 1538 This provides commands for accessing a YAFFS2 filesystem. Yet 1539 Another Flash Filesystem 2 is a filesystem designed specifically 1540 for NAND flash. It incorporates bad-block management and ensures 1541 that device writes are sequential regardless of filesystem 1542 activity. 1543 1544config CMD_ZFS 1545 bool "zfs - Access of ZFS filesystem" 1546 help 1547 This provides commands to accessing a ZFS filesystem, commonly used 1548 on Solaris systems. Two sub-commands are provided: 1549 1550 zfsls - list files in a directory 1551 zfsload - load a file 1552 1553 See doc/README.zfs for more details. 1554 1555endmenu 1556 1557menu "Debug commands" 1558 1559config CMD_BEDBUG 1560 bool "bedbug" 1561 help 1562 The bedbug (emBEDded deBUGger) command provides debugging features 1563 for some PowerPC processors. For details please see the 1564 docuemntation in doc/README.beddbug 1565 1566config CMD_DIAG 1567 bool "diag - Board diagnostics" 1568 help 1569 This command provides access to board diagnostic tests. These are 1570 called Power-on Self Tests (POST). The command allows listing of 1571 available tests and running either all the tests, or specific tests 1572 identified by name. 1573 1574config CMD_IRQ 1575 bool "irq - Show information about interrupts" 1576 depends on !ARM && !MIPS && !SH 1577 help 1578 This enables two commands: 1579 1580 interrupts - enable or disable interrupts 1581 irqinfo - print device-specific interrupt information 1582 1583config CMD_KGDB 1584 bool "kgdb - Allow debugging of U-Boot with gdb" 1585 help 1586 This enables a 'kgdb' command which allows gdb to connect to U-Boot 1587 over a serial link for debugging purposes. This allows 1588 single-stepping, inspecting variables, etc. This is supported only 1589 on PowerPC at present. 1590 1591config CMD_LOG 1592 bool "log - Generation, control and access to logging" 1593 help 1594 This provides access to logging features. It allows the output of 1595 log data to be controlled to a limited extent (setting up the default 1596 maximum log level for emitting of records). It also provides access 1597 to a command used for testing the log system. 1598 1599config CMD_TRACE 1600 bool "trace - Support tracing of function calls and timing" 1601 help 1602 Enables a command to control using of function tracing within 1603 U-Boot. This allows recording of call traces including timing 1604 information. The command can write data to memory for exporting 1605 for analsys (e.g. using bootchart). See doc/README.trace for full 1606 details. 1607 1608endmenu 1609 1610config CMD_UBI 1611 tristate "Enable UBI - Unsorted block images commands" 1612 select CRC32 1613 select MTD_UBI 1614 select CMD_MTDPARTS 1615 default y if NAND_SUNXI 1616 help 1617 UBI is a software layer above MTD layer which admits use of LVM-like 1618 logical volumes on top of MTD devices, hides some complexities of 1619 flash chips like wear and bad blocks and provides some other useful 1620 capabilities. Please, consult the MTD web site for more details 1621 (www.linux-mtd.infradead.org). Activate this option if you want 1622 to use U-Boot UBI commands. 1623 1624config CMD_UBIFS 1625 tristate "Enable UBIFS - Unsorted block images filesystem commands" 1626 depends on CMD_UBI 1627 select CRC32 1628 select LZO 1629 default y if CMD_UBI 1630 help 1631 UBIFS is a file system for flash devices which works on top of UBI. 1632 1633endmenu 1634