Documentation/ABI/testing/sysfs-driver-ufs

   1 What:           /sys/bus/*/drivers/ufshcd/*/auto_hibern8
   2 Date:           March 2018
   3 Contact:        linux-scsi@vger.kernel.org
   4 Description:
   5                 This file contains the auto-hibernate idle timer setting of a
   6                 UFS host controller. A value of '0' means auto-hibernate is not
   7                 enabled. Otherwise the value is the number of microseconds of
   8                 idle time before the UFS host controller will autonomously put
   9                 the link into hibernate state. That will save power at the
  10                 expense of increased latency. Note that the hardware supports
  11                 10-bit values with a power-of-ten multiplier which allows a
  12                 maximum value of 102300000. Refer to the UFS Host Controller
  13                 Interface specification for more details.
  14
  15 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_type
  16 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/device_type
  17 Date:           February 2018
  18 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  19 Description:    This file shows the device type. This is one of the UFS
  20                 device descriptor parameters. The full information about
  21                 the descriptor could be found at UFS specifications 2.1.
  22
  23                 The file is read only.
  24
  25 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_class
  26 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/device_class
  27 Date:           February 2018
  28 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  29 Description:    This file shows the device class. This is one of the UFS
  30                 device descriptor parameters. The full information about
  31                 the descriptor could be found at UFS specifications 2.1.
  32
  33                 The file is read only.
  34
  35 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_sub_class
  36 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/device_sub_class
  37 Date:           February 2018
  38 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  39 Description:    This file shows the UFS storage subclass. This is one of
  40                 the UFS device descriptor parameters. The full information
  41                 about the descriptor could be found at UFS specifications 2.1.
  42
  43                 The file is read only.
  44
  45 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/protocol
  46 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/protocol
  47 Date:           February 2018
  48 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  49 Description:    This file shows the protocol supported by an UFS device.
  50                 This is one of the UFS device descriptor parameters.
  51                 The full information about the descriptor could be found
  52                 at UFS specifications 2.1.
  53
  54                 The file is read only.
  55
  56 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_luns
  57 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/number_of_luns
  58 Date:           February 2018
  59 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  60 Description:    This file shows number of logical units. This is one of
  61                 the UFS device descriptor parameters. The full information
  62                 about the descriptor could be found at UFS specifications 2.1.
  63
  64                 The file is read only.
  65
  66 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_wluns
  67 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/number_of_wluns
  68 Date:           February 2018
  69 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  70 Description:    This file shows number of well known logical units.
  71                 This is one of the UFS device descriptor parameters.
  72                 The full information about the descriptor could be found
  73                 at UFS specifications 2.1.
  74
  75                 The file is read only.
  76
  77 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/boot_enable
  78 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/boot_enable
  79 Date:           February 2018
  80 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  81 Description:    This file shows value that indicates whether the device is
  82                 enabled for boot. This is one of the UFS device descriptor
  83                 parameters. The full information about the descriptor could
  84                 be found at UFS specifications 2.1.
  85
  86                 The file is read only.
  87
  88 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/descriptor_access_enable
  89 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/descriptor_access_enable
  90 Date:           February 2018
  91 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
  92 Description:    This file shows value that indicates whether the device
  93                 descriptor could be read after partial initialization phase
  94                 of the boot sequence. This is one of the UFS device descriptor
  95                 parameters. The full information about the descriptor could
  96                 be found at UFS specifications 2.1.
  97
  98                 The file is read only.
  99
 100 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_power_mode
 101 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/initial_power_mode
 102 Date:           February 2018
 103 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 104 Description:    This file shows value that defines the power mode after
 105                 device initialization or hardware reset. This is one of
 106                 the UFS device descriptor parameters. The full information
 107                 about the descriptor could be found at UFS specifications 2.1.
 108
 109                 The file is read only.
 110
 111 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/high_priority_lun
 112 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/high_priority_lun
 113 Date:           February 2018
 114 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 115 Description:    This file shows the high priority lun. This is one of
 116                 the UFS device descriptor parameters. The full information
 117                 about the descriptor could be found at UFS specifications 2.1.
 118
 119                 The file is read only.
 120
 121 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/secure_removal_type
 122 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/secure_removal_type
 123 Date:           February 2018
 124 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 125 Description:    This file shows the secure removal type. This is one of
 126                 the UFS device descriptor parameters. The full information
 127                 about the descriptor could be found at UFS specifications 2.1.
 128
 129                 The file is read only.
 130
 131 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/support_security_lun
 132 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/support_security_lun
 133 Date:           February 2018
 134 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 135 Description:    This file shows whether the security lun is supported.
 136                 This is one of the UFS device descriptor parameters.
 137                 The full information about the descriptor could be found
 138                 at UFS specifications 2.1.
 139
 140                 The file is read only.
 141
 142 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/bkops_termination_latency
 143 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/bkops_termination_latency
 144 Date:           February 2018
 145 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 146 Description:    This file shows the background operations termination
 147                 latency. This is one of the UFS device descriptor parameters.
 148                 The full information about the descriptor could be found
 149                 at UFS specifications 2.1.
 150
 151                 The file is read only.
 152
 153 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/initial_active_icc_level
 154 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/initial_active_icc_level
 155 Date:           February 2018
 156 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 157 Description:    This file shows the initial active ICC level. This is one
 158                 of the UFS device descriptor parameters. The full information
 159                 about the descriptor could be found at UFS specifications 2.1.
 160
 161                 The file is read only.
 162
 163 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/specification_version
 164 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/specification_version
 165 Date:           February 2018
 166 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 167 Description:    This file shows the specification version. This is one
 168                 of the UFS device descriptor parameters. The full information
 169                 about the descriptor could be found at UFS specifications 2.1.
 170
 171                 The file is read only.
 172
 173 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturing_date
 174 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/manufacturing_date
 175 Date:           February 2018
 176 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 177 Description:    This file shows the manufacturing date in BCD format.
 178                 This is one of the UFS device descriptor parameters.
 179                 The full information about the descriptor could be found
 180                 at UFS specifications 2.1.
 181
 182                 The file is read only.
 183
 184 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/manufacturer_id
 185 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/manufacturer_id
 186 Date:           February 2018
 187 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 188 Description:    This file shows the manufacturer ID. This is one of the
 189                 UFS device descriptor parameters. The full information about
 190                 the descriptor could be found at UFS specifications 2.1.
 191
 192                 The file is read only.
 193
 194 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtt_capability
 195 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/rtt_capability
 196 Date:           February 2018
 197 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 198 Description:    This file shows the maximum number of outstanding RTTs
 199                 supported by the device. This is one of the UFS device
 200                 descriptor parameters. The full information about
 201                 the descriptor could be found at UFS specifications 2.1.
 202
 203                 The file is read only.
 204
 205 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/rtc_update
 206 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/rtc_update
 207 Date:           February 2018
 208 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 209 Description:    This file shows the frequency and method of the realtime
 210                 clock update. This is one of the UFS device descriptor
 211                 parameters. The full information about the descriptor
 212                 could be found at UFS specifications 2.1.
 213
 214                 The file is read only.
 215
 216 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ufs_features
 217 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/ufs_features
 218 Date:           February 2018
 219 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 220 Description:    This file shows which features are supported by the device.
 221                 This is one of the UFS device descriptor parameters.
 222                 The full information about the descriptor could be
 223                 found at UFS specifications 2.1.
 224
 225                 The file is read only.
 226
 227 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/ffu_timeout
 228 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/ffu_timeout
 229 Date:           February 2018
 230 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 231 Description:    This file shows the FFU timeout. This is one of the
 232                 UFS device descriptor parameters. The full information
 233                 about the descriptor could be found at UFS specifications 2.1.
 234
 235                 The file is read only.
 236
 237 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/queue_depth
 238 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/queue_depth
 239 Date:           February 2018
 240 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 241 Description:    This file shows the device queue depth. This is one of the
 242                 UFS device descriptor parameters. The full information
 243                 about the descriptor could be found at UFS specifications 2.1.
 244
 245                 The file is read only.
 246
 247 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/device_version
 248 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/device_version
 249 Date:           February 2018
 250 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 251 Description:    This file shows the device version. This is one of the
 252                 UFS device descriptor parameters. The full information
 253                 about the descriptor could be found at UFS specifications 2.1.
 254
 255                 The file is read only.
 256
 257 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/number_of_secure_wpa
 258 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/number_of_secure_wpa
 259 Date:           February 2018
 260 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 261 Description:    This file shows number of secure write protect areas
 262                 supported by the device. This is one of the UFS device
 263                 descriptor parameters. The full information about
 264                 the descriptor could be found at UFS specifications 2.1.
 265
 266                 The file is read only.
 267
 268 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_max_data_size
 269 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/psa_max_data_size
 270 Date:           February 2018
 271 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 272 Description:    This file shows the maximum amount of data that may be
 273                 written during the pre-soldering phase of the PSA flow.
 274                 This is one of the UFS device descriptor parameters.
 275                 The full information about the descriptor could be found
 276                 at UFS specifications 2.1.
 277
 278                 The file is read only.
 279
 280 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/psa_state_timeout
 281 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/psa_state_timeout
 282 Date:           February 2018
 283 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 284 Description:    This file shows the command maximum timeout for a change
 285                 in PSA state. This is one of the UFS device descriptor
 286                 parameters. The full information about the descriptor could
 287                 be found at UFS specifications 2.1.
 288
 289                 The file is read only.
 290
 291
 292 What:           /sys/bus/platform/drivers/ufshcd/*/interconnect_descriptor/unipro_version
 293 What:           /sys/bus/platform/devices/*.ufs/interconnect_descriptor/unipro_version
 294 Date:           February 2018
 295 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 296 Description:    This file shows the MIPI UniPro version number in BCD format.
 297                 This is one of the UFS interconnect descriptor parameters.
 298                 The full information about the descriptor could be found at
 299                 UFS specifications 2.1.
 300
 301                 The file is read only.
 302
 303 What:           /sys/bus/platform/drivers/ufshcd/*/interconnect_descriptor/mphy_version
 304 What:           /sys/bus/platform/devices/*.ufs/interconnect_descriptor/mphy_version
 305 Date:           February 2018
 306 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 307 Description:    This file shows the MIPI M-PHY version number in BCD format.
 308                 This is one of the UFS interconnect descriptor parameters.
 309                 The full information about the descriptor could be found at
 310                 UFS specifications 2.1.
 311
 312                 The file is read only.
 313
 314
 315 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/raw_device_capacity
 316 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/raw_device_capacity
 317 Date:           February 2018
 318 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 319 Description:    This file shows the total memory quantity available to
 320                 the user to configure the device logical units. This is one
 321                 of the UFS geometry descriptor parameters. The full
 322                 information about the descriptor could be found at
 323                 UFS specifications 2.1.
 324
 325                 The file is read only.
 326
 327 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_luns
 328 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_number_of_luns
 329 Date:           February 2018
 330 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 331 Description:    This file shows the maximum number of logical units
 332                 supported by the UFS device. This is one of the UFS
 333                 geometry descriptor parameters. The full information about
 334                 the descriptor could be found at UFS specifications 2.1.
 335
 336                 The file is read only.
 337
 338 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/segment_size
 339 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/segment_size
 340 Date:           February 2018
 341 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 342 Description:    This file shows the segment size. This is one of the UFS
 343                 geometry descriptor parameters. The full information about
 344                 the descriptor could be found at UFS specifications 2.1.
 345
 346                 The file is read only.
 347
 348 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/allocation_unit_size
 349 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/allocation_unit_size
 350 Date:           February 2018
 351 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 352 Description:    This file shows the allocation unit size. This is one of
 353                 the UFS geometry descriptor parameters. The full information
 354                 about the descriptor could be found at UFS specifications 2.1.
 355
 356                 The file is read only.
 357
 358 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/min_addressable_block_size
 359 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/min_addressable_block_size
 360 Date:           February 2018
 361 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 362 Description:    This file shows the minimum addressable block size. This
 363                 is one of the UFS geometry descriptor parameters. The full
 364                 information about the descriptor could be found at UFS
 365                 specifications 2.1.
 366
 367                 The file is read only.
 368
 369 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_read_block_size
 370 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/optimal_read_block_size
 371 Date:           February 2018
 372 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 373 Description:    This file shows the optimal read block size. This is one
 374                 of the UFS geometry descriptor parameters. The full
 375                 information about the descriptor could be found at UFS
 376                 specifications 2.1.
 377
 378                 The file is read only.
 379
 380 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/optimal_write_block_size
 381 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/optimal_write_block_size
 382 Date:           February 2018
 383 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 384 Description:    This file shows the optimal write block size. This is one
 385                 of the UFS geometry descriptor parameters. The full
 386                 information about the descriptor could be found at UFS
 387                 specifications 2.1.
 388
 389                 The file is read only.
 390
 391 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_in_buffer_size
 392 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_in_buffer_size
 393 Date:           February 2018
 394 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 395 Description:    This file shows the maximum data-in buffer size. This
 396                 is one of the UFS geometry descriptor parameters. The full
 397                 information about the descriptor could be found at UFS
 398                 specifications 2.1.
 399
 400                 The file is read only.
 401
 402 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_out_buffer_size
 403 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_out_buffer_size
 404 Date:           February 2018
 405 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 406 Description:    This file shows the maximum data-out buffer size. This
 407                 is one of the UFS geometry descriptor parameters. The full
 408                 information about the descriptor could be found at UFS
 409                 specifications 2.1.
 410
 411                 The file is read only.
 412
 413 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/rpmb_rw_size
 414 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/rpmb_rw_size
 415 Date:           February 2018
 416 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 417 Description:    This file shows the maximum number of RPMB frames allowed
 418                 in Security Protocol In/Out. This is one of the UFS geometry
 419                 descriptor parameters. The full information about the
 420                 descriptor could be found at UFS specifications 2.1.
 421
 422                 The file is read only.
 423
 424 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/dyn_capacity_resource_policy
 425 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/dyn_capacity_resource_policy
 426 Date:           February 2018
 427 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 428 Description:    This file shows the dynamic capacity resource policy. This
 429                 is one of the UFS geometry descriptor parameters. The full
 430                 information about the descriptor could be found at
 431                 UFS specifications 2.1.
 432
 433                 The file is read only.
 434
 435 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/data_ordering
 436 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/data_ordering
 437 Date:           February 2018
 438 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 439 Description:    This file shows support for out-of-order data transfer.
 440                 This is one of the UFS geometry descriptor parameters.
 441                 The full information about the descriptor could be found at
 442                 UFS specifications 2.1.
 443
 444                 The file is read only.
 445
 446 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/max_number_of_contexts
 447 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/max_number_of_contexts
 448 Date:           February 2018
 449 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 450 Description:    This file shows maximum available number of contexts which
 451                 are supported by the device. This is one of the UFS geometry
 452                 descriptor parameters. The full information about the
 453                 descriptor could be found at UFS specifications 2.1.
 454
 455                 The file is read only.
 456
 457 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_unit_size
 458 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/sys_data_tag_unit_size
 459 Date:           February 2018
 460 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 461 Description:    This file shows system data tag unit size. This is one of
 462                 the UFS geometry descriptor parameters. The full information
 463                 about the descriptor could be found at UFS specifications 2.1.
 464
 465                 The file is read only.
 466
 467 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/sys_data_tag_resource_size
 468 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/sys_data_tag_resource_size
 469 Date:           February 2018
 470 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 471 Description:    This file shows maximum storage area size allocated by
 472                 the device to handle system data by the tagging mechanism.
 473                 This is one of the UFS geometry descriptor parameters.
 474                 The full information about the descriptor could be found at
 475                 UFS specifications 2.1.
 476
 477                 The file is read only.
 478
 479 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/secure_removal_types
 480 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/secure_removal_types
 481 Date:           February 2018
 482 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 483 Description:    This file shows supported secure removal types. This is
 484                 one of the UFS geometry descriptor parameters. The full
 485                 information about the descriptor could be found at
 486                 UFS specifications 2.1.
 487
 488                 The file is read only.
 489
 490 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/memory_types
 491 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/memory_types
 492 Date:           February 2018
 493 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 494 Description:    This file shows supported memory types. This is one of
 495                 the UFS geometry descriptor parameters. The full
 496                 information about the descriptor could be found at
 497                 UFS specifications 2.1.
 498
 499                 The file is read only.
 500
 501 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_max_alloc_units
 502 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/*_memory_max_alloc_units
 503 Date:           February 2018
 504 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 505 Description:    This file shows the maximum number of allocation units for
 506                 different memory types (system code, non persistent,
 507                 enhanced type 1-4). This is one of the UFS geometry
 508                 descriptor parameters. The full information about the
 509                 descriptor could be found at UFS specifications 2.1.
 510
 511                 The file is read only.
 512
 513 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/*_memory_capacity_adjustment_factor
 514 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/*_memory_capacity_adjustment_factor
 515 Date:           February 2018
 516 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 517 Description:    This file shows the memory capacity adjustment factor for
 518                 different memory types (system code, non persistent,
 519                 enhanced type 1-4). This is one of the UFS geometry
 520                 descriptor parameters. The full information about the
 521                 descriptor could be found at UFS specifications 2.1.
 522
 523                 The file is read only.
 524
 525
 526 What:           /sys/bus/platform/drivers/ufshcd/*/health_descriptor/eol_info
 527 What:           /sys/bus/platform/devices/*.ufs/health_descriptor/eol_info
 528 Date:           February 2018
 529 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 530 Description:    This file shows preend of life information. This is one
 531                 of the UFS health descriptor parameters. The full
 532                 information about the descriptor could be found at
 533                 UFS specifications 2.1.
 534
 535                 The file is read only.
 536
 537 What:           /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_a
 538 What:           /sys/bus/platform/devices/*.ufs/health_descriptor/life_time_estimation_a
 539 Date:           February 2018
 540 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 541 Description:    This file shows indication of the device life time
 542                 (method a). This is one of the UFS health descriptor
 543                 parameters. The full information about the descriptor
 544                 could be found at UFS specifications 2.1.
 545
 546                 The file is read only.
 547
 548 What:           /sys/bus/platform/drivers/ufshcd/*/health_descriptor/life_time_estimation_b
 549 What:           /sys/bus/platform/devices/*.ufs/health_descriptor/life_time_estimation_b
 550 Date:           February 2018
 551 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 552 Description:    This file shows indication of the device life time
 553                 (method b). This is one of the UFS health descriptor
 554                 parameters. The full information about the descriptor
 555                 could be found at UFS specifications 2.1.
 556
 557                 The file is read only.
 558
 559
 560 What:           /sys/bus/platform/drivers/ufshcd/*/power_descriptor/active_icc_levels_vcc*
 561 What:           /sys/bus/platform/devices/*.ufs/power_descriptor/active_icc_levels_vcc*
 562 Date:           February 2018
 563 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 564 Description:    This file shows maximum VCC, VCCQ and VCCQ2 value for
 565                 active ICC levels from 0 to 15. This is one of the UFS
 566                 power descriptor parameters. The full information about
 567                 the descriptor could be found at UFS specifications 2.1.
 568
 569                 The file is read only.
 570
 571
 572 What:           /sys/bus/platform/drivers/ufshcd/*/string_descriptors/manufacturer_name
 573 What:           /sys/bus/platform/devices/*.ufs/string_descriptors/manufacturer_name
 574 Date:           February 2018
 575 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 576 Description:    This file contains a device manufacturer name string.
 577                 The full information about the descriptor could be found at
 578                 UFS specifications 2.1.
 579
 580                 The file is read only.
 581
 582 What:           /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_name
 583 What:           /sys/bus/platform/devices/*.ufs/string_descriptors/product_name
 584 Date:           February 2018
 585 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 586 Description:    This file contains a product name string. The full information
 587                 about the descriptor could be found at UFS specifications 2.1.
 588
 589                 The file is read only.
 590
 591 What:           /sys/bus/platform/drivers/ufshcd/*/string_descriptors/oem_id
 592 What:           /sys/bus/platform/devices/*.ufs/string_descriptors/oem_id
 593 Date:           February 2018
 594 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 595 Description:    This file contains a OEM ID string. The full information
 596                 about the descriptor could be found at UFS specifications 2.1.
 597
 598                 The file is read only.
 599
 600 What:           /sys/bus/platform/drivers/ufshcd/*/string_descriptors/serial_number
 601 What:           /sys/bus/platform/devices/*.ufs/string_descriptors/serial_number
 602 Date:           February 2018
 603 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 604 Description:    This file contains a device serial number string. The full
 605                 information about the descriptor could be found at
 606                 UFS specifications 2.1.
 607
 608                 The file is read only.
 609
 610 What:           /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_revision
 611 What:           /sys/bus/platform/devices/*.ufs/string_descriptors/product_revision
 612 Date:           February 2018
 613 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 614 Description:    This file contains a product revision string. The full
 615                 information about the descriptor could be found at
 616                 UFS specifications 2.1.
 617
 618                 The file is read only.
 619
 620
 621 What:           /sys/class/scsi_device/*/device/unit_descriptor/boot_lun_id
 622 Date:           February 2018
 623 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 624 Description:    This file shows boot LUN information. This is one of
 625                 the UFS unit descriptor parameters. The full information
 626                 about the descriptor could be found at UFS specifications 2.1.
 627
 628                 The file is read only.
 629
 630 What:           /sys/class/scsi_device/*/device/unit_descriptor/lun_write_protect
 631 Date:           February 2018
 632 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 633 Description:    This file shows LUN write protection status. This is one of
 634                 the UFS unit descriptor parameters. The full information
 635                 about the descriptor could be found at UFS specifications 2.1.
 636
 637                 The file is read only.
 638
 639 What:           /sys/class/scsi_device/*/device/unit_descriptor/lun_queue_depth
 640 Date:           February 2018
 641 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 642 Description:    This file shows LUN queue depth. This is one of the UFS
 643                 unit descriptor parameters. The full information about
 644                 the descriptor could be found at UFS specifications 2.1.
 645
 646                 The file is read only.
 647
 648 What:           /sys/class/scsi_device/*/device/unit_descriptor/psa_sensitive
 649 Date:           February 2018
 650 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 651 Description:    This file shows PSA sensitivity. This is one of the UFS
 652                 unit descriptor parameters. The full information about
 653                 the descriptor could be found at UFS specifications 2.1.
 654
 655                 The file is read only.
 656
 657 What:           /sys/class/scsi_device/*/device/unit_descriptor/lun_memory_type
 658 Date:           February 2018
 659 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 660 Description:    This file shows LUN memory type. This is one of the UFS
 661                 unit descriptor parameters. The full information about
 662                 the descriptor could be found at UFS specifications 2.1.
 663
 664                 The file is read only.
 665
 666 What:           /sys/class/scsi_device/*/device/unit_descriptor/data_reliability
 667 Date:           February 2018
 668 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 669 Description:    This file defines the device behavior when a power failure
 670                 occurs during a write operation. This is one of the UFS
 671                 unit descriptor parameters. The full information about
 672                 the descriptor could be found at UFS specifications 2.1.
 673
 674                 The file is read only.
 675
 676 What:           /sys/class/scsi_device/*/device/unit_descriptor/logical_block_size
 677 Date:           February 2018
 678 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 679 Description:    This file shows the size of addressable logical blocks
 680                 (calculated as an exponent with base 2). This is one of
 681                 the UFS unit descriptor parameters. The full information about
 682                 the descriptor could be found at UFS specifications 2.1.
 683
 684                 The file is read only.
 685
 686 What:           /sys/class/scsi_device/*/device/unit_descriptor/logical_block_count
 687 Date:           February 2018
 688 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 689 Description:    This file shows total number of addressable logical blocks.
 690                 This is one of the UFS unit descriptor parameters. The full
 691                 information about the descriptor could be found at
 692                 UFS specifications 2.1.
 693
 694                 The file is read only.
 695
 696 What:           /sys/class/scsi_device/*/device/unit_descriptor/erase_block_size
 697 Date:           February 2018
 698 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 699 Description:    This file shows the erase block size. This is one of
 700                 the UFS unit descriptor parameters. The full information
 701                 about the descriptor could be found at UFS specifications 2.1.
 702
 703                 The file is read only.
 704
 705 What:           /sys/class/scsi_device/*/device/unit_descriptor/provisioning_type
 706 Date:           February 2018
 707 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 708 Description:    This file shows the thin provisioning type. This is one of
 709                 the UFS unit descriptor parameters. The full information
 710                 about the descriptor could be found at UFS specifications 2.1.
 711
 712                 The file is read only.
 713
 714 What:           /sys/class/scsi_device/*/device/unit_descriptor/physical_memory_resourse_count
 715 Date:           February 2018
 716 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 717 Description:    This file shows the total physical memory resources. This is
 718                 one of the UFS unit descriptor parameters. The full information
 719                 about the descriptor could be found at UFS specifications 2.1.
 720
 721                 The file is read only.
 722
 723 What:           /sys/class/scsi_device/*/device/unit_descriptor/context_capabilities
 724 Date:           February 2018
 725 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 726 Description:    This file shows the context capabilities. This is one of
 727                 the UFS unit descriptor parameters. The full information
 728                 about the descriptor could be found at UFS specifications 2.1.
 729
 730                 The file is read only.
 731
 732 What:           /sys/class/scsi_device/*/device/unit_descriptor/large_unit_granularity
 733 Date:           February 2018
 734 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 735 Description:    This file shows the granularity of the LUN. This is one of
 736                 the UFS unit descriptor parameters. The full information
 737                 about the descriptor could be found at UFS specifications 2.1.
 738
 739                 The file is read only.
 740
 741
 742 What:           /sys/bus/platform/drivers/ufshcd/*/flags/device_init
 743 What:           /sys/bus/platform/devices/*.ufs/flags/device_init
 744 Date:           February 2018
 745 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 746 Description:    This file shows the device init status. The full information
 747                 about the flag could be found at UFS specifications 2.1.
 748
 749                 The file is read only.
 750
 751 What:           /sys/bus/platform/drivers/ufshcd/*/flags/permanent_wpe
 752 What:           /sys/bus/platform/devices/*.ufs/flags/permanent_wpe
 753 Date:           February 2018
 754 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 755 Description:    This file shows whether permanent write protection is enabled.
 756                 The full information about the flag could be found at
 757                 UFS specifications 2.1.
 758
 759                 The file is read only.
 760
 761 What:           /sys/bus/platform/drivers/ufshcd/*/flags/power_on_wpe
 762 What:           /sys/bus/platform/devices/*.ufs/flags/power_on_wpe
 763 Date:           February 2018
 764 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 765 Description:    This file shows whether write protection is enabled on all
 766                 logical units configured as power on write protected. The
 767                 full information about the flag could be found at
 768                 UFS specifications 2.1.
 769
 770                 The file is read only.
 771
 772 What:           /sys/bus/platform/drivers/ufshcd/*/flags/bkops_enable
 773 What:           /sys/bus/platform/devices/*.ufs/flags/bkops_enable
 774 Date:           February 2018
 775 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 776 Description:    This file shows whether the device background operations are
 777                 enabled. The full information about the flag could be
 778                 found at UFS specifications 2.1.
 779
 780                 The file is read only.
 781
 782 What:           /sys/bus/platform/drivers/ufshcd/*/flags/life_span_mode_enable
 783 What:           /sys/bus/platform/devices/*.ufs/flags/life_span_mode_enable
 784 Date:           February 2018
 785 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 786 Description:    This file shows whether the device life span mode is enabled.
 787                 The full information about the flag could be found at
 788                 UFS specifications 2.1.
 789
 790                 The file is read only.
 791
 792 What:           /sys/bus/platform/drivers/ufshcd/*/flags/phy_resource_removal
 793 What:           /sys/bus/platform/devices/*.ufs/flags/phy_resource_removal
 794 Date:           February 2018
 795 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 796 Description:    This file shows whether physical resource removal is enable.
 797                 The full information about the flag could be found at
 798                 UFS specifications 2.1.
 799
 800                 The file is read only.
 801
 802 What:           /sys/bus/platform/drivers/ufshcd/*/flags/busy_rtc
 803 What:           /sys/bus/platform/devices/*.ufs/flags/busy_rtc
 804 Date:           February 2018
 805 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 806 Description:    This file shows whether the device is executing internal
 807                 operation related to real time clock. The full information
 808                 about the flag could be found at UFS specifications 2.1.
 809
 810                 The file is read only.
 811
 812 What:           /sys/bus/platform/drivers/ufshcd/*/flags/disable_fw_update
 813 What:           /sys/bus/platform/devices/*.ufs/flags/disable_fw_update
 814 Date:           February 2018
 815 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 816 Description:    This file shows whether the device FW update is permanently
 817                 disabled. The full information about the flag could be found
 818                 at UFS specifications 2.1.
 819
 820                 The file is read only.
 821
 822
 823 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/boot_lun_enabled
 824 What:           /sys/bus/platform/devices/*.ufs/attributes/boot_lun_enabled
 825 Date:           February 2018
 826 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 827 Description:    This file provides the boot lun enabled UFS device attribute.
 828                 The full information about the attribute could be found at
 829                 UFS specifications 2.1.
 830
 831                 The file is read only.
 832
 833 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/current_power_mode
 834 What:           /sys/bus/platform/devices/*.ufs/attributes/current_power_mode
 835 Date:           February 2018
 836 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 837 Description:    This file provides the current power mode UFS device attribute.
 838                 The full information about the attribute could be found at
 839                 UFS specifications 2.1.
 840
 841                 The file is read only.
 842
 843 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/active_icc_level
 844 What:           /sys/bus/platform/devices/*.ufs/attributes/active_icc_level
 845 Date:           February 2018
 846 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 847 Description:    This file provides the active icc level UFS device attribute.
 848                 The full information about the attribute could be found at
 849                 UFS specifications 2.1.
 850
 851                 The file is read only.
 852
 853 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/ooo_data_enabled
 854 What:           /sys/bus/platform/devices/*.ufs/attributes/ooo_data_enabled
 855 Date:           February 2018
 856 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 857 Description:    This file provides the out of order data transfer enabled UFS
 858                 device attribute. The full information about the attribute
 859                 could be found at UFS specifications 2.1.
 860
 861                 The file is read only.
 862
 863 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/bkops_status
 864 What:           /sys/bus/platform/devices/*.ufs/attributes/bkops_status
 865 Date:           February 2018
 866 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 867 Description:    This file provides the background operations status UFS device
 868                 attribute. The full information about the attribute could
 869                 be found at UFS specifications 2.1.
 870
 871                 The file is read only.
 872
 873 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/purge_status
 874 What:           /sys/bus/platform/devices/*.ufs/attributes/purge_status
 875 Date:           February 2018
 876 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 877 Description:    This file provides the purge operation status UFS device
 878                 attribute. The full information about the attribute could
 879                 be found at UFS specifications 2.1.
 880
 881                 The file is read only.
 882
 883 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_in_size
 884 What:           /sys/bus/platform/devices/*.ufs/attributes/max_data_in_size
 885 Date:           February 2018
 886 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 887 Description:    This file shows the maximum data size in a DATA IN
 888                 UPIU. The full information about the attribute could
 889                 be found at UFS specifications 2.1.
 890
 891                 The file is read only.
 892
 893 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/max_data_out_size
 894 What:           /sys/bus/platform/devices/*.ufs/attributes/max_data_out_size
 895 Date:           February 2018
 896 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 897 Description:    This file shows the maximum number of bytes that can be
 898                 requested with a READY TO TRANSFER UPIU. The full information
 899                 about the attribute could be found at UFS specifications 2.1.
 900
 901                 The file is read only.
 902
 903 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/reference_clock_frequency
 904 What:           /sys/bus/platform/devices/*.ufs/attributes/reference_clock_frequency
 905 Date:           February 2018
 906 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 907 Description:    This file provides the reference clock frequency UFS device
 908                 attribute. The full information about the attribute could
 909                 be found at UFS specifications 2.1.
 910
 911                 The file is read only.
 912
 913 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/configuration_descriptor_lock
 914 What:           /sys/bus/platform/devices/*.ufs/attributes/configuration_descriptor_lock
 915 Date:           February 2018
 916 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 917 Description:    This file shows whether the configuration descriptor is locked.
 918                 The full information about the attribute could be found at
 919                 UFS specifications 2.1. The file is read only.
 920
 921 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/max_number_of_rtt
 922 What:           /sys/bus/platform/devices/*.ufs/attributes/max_number_of_rtt
 923 Date:           May 2024
 924 Contact:        Avri Altman <avri.altman@wdc.com>
 925 Description:    This file provides the maximum current number of
 926                 outstanding RTTs in device that is allowed. bMaxNumOfRTT is a
 927                 read-write persistent attribute and is equal to two after device
 928                 manufacturing. It shall not be set to a value greater than
 929                 bDeviceRTTCap value, and it may be set only when the hw queues are
 930                 empty.
 931
 932                 The file is read write.
 933
 934 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_control
 935 What:           /sys/bus/platform/devices/*.ufs/attributes/exception_event_control
 936 Date:           February 2018
 937 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 938 Description:    This file provides the exception event control UFS device
 939                 attribute. The full information about the attribute could
 940                 be found at UFS specifications 2.1.
 941
 942                 The file is read only.
 943
 944 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/exception_event_status
 945 What:           /sys/bus/platform/devices/*.ufs/attributes/exception_event_status
 946 Date:           February 2018
 947 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 948 Description:    This file provides the exception event status UFS device
 949                 attribute. The full information about the attribute could
 950                 be found at UFS specifications 2.1.
 951
 952                 The file is read only.
 953
 954 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/ffu_status
 955 What:           /sys/bus/platform/devices/*.ufs/attributes/ffu_status
 956 Date:           February 2018
 957 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 958 Description:    This file provides the ffu status UFS device attribute.
 959                 The full information about the attribute could be found at
 960                 UFS specifications 2.1.
 961
 962                 The file is read only.
 963
 964 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/psa_state
 965 What:           /sys/bus/platform/devices/*.ufs/attributes/psa_state
 966 Date:           February 2018
 967 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 968 Description:    This file show the PSA feature status. The full information
 969                 about the attribute could be found at UFS specifications 2.1.
 970
 971                 The file is read only.
 972
 973 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/psa_data_size
 974 What:           /sys/bus/platform/devices/*.ufs/attributes/psa_data_size
 975 Date:           February 2018
 976 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 977 Description:    This file shows the amount of data that the host plans to
 978                 load to all logical units in pre-soldering state.
 979                 The full information about the attribute could be found at
 980                 UFS specifications 2.1.
 981
 982                 The file is read only.
 983
 984
 985 What:           /sys/class/scsi_device/*/device/dyn_cap_needed
 986 Date:           February 2018
 987 Contact:        Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
 988 Description:    This file shows the amount of physical memory needed
 989                 to be removed from the physical memory resources pool of
 990                 the particular logical unit. The full information about
 991                 the attribute could be found at UFS specifications 2.1.
 992
 993                 The file is read only.
 994
 995
 996 What:           /sys/bus/platform/drivers/ufshcd/*/rpm_lvl
 997 What:           /sys/bus/platform/devices/*.ufs/rpm_lvl
 998 Date:           September 2014
 999 Contact:        Can Guo <quic_cang@quicinc.com>
1000 Description:    This entry could be used to set or show the UFS device
1001                 runtime power management level. The current driver
1002                 implementation supports 7 levels with next target states:
1003
1004                 ==  ====================================================
1005                 0   UFS device will stay active, UIC link will
1006                     stay active
1007                 1   UFS device will stay active, UIC link will
1008                     hibernate
1009                 2   UFS device will be moved to sleep, UIC link will
1010                     stay active
1011                 3   UFS device will be moved to sleep, UIC link will
1012                     hibernate
1013                 4   UFS device will be powered off, UIC link will
1014                     hibernate
1015                 5   UFS device will be powered off, UIC link will
1016                     be powered off
1017                 6   UFS device will be moved to deep sleep, UIC link
1018                     will be powered off. Note, deep sleep might not be
1019                     supported in which case this value will not be
1020                     accepted
1021                 ==  ====================================================
1022
1023 What:           /sys/bus/platform/drivers/ufshcd/*/rpm_target_dev_state
1024 What:           /sys/bus/platform/devices/*.ufs/rpm_target_dev_state
1025 Date:           February 2018
1026 Contact:        Can Guo <quic_cang@quicinc.com>
1027 Description:    This entry shows the target power mode of an UFS device
1028                 for the chosen runtime power management level.
1029
1030                 The file is read only.
1031
1032 What:           /sys/bus/platform/drivers/ufshcd/*/rpm_target_link_state
1033 What:           /sys/bus/platform/devices/*.ufs/rpm_target_link_state
1034 Date:           February 2018
1035 Contact:        Can Guo <quic_cang@quicinc.com>
1036 Description:    This entry shows the target state of an UFS UIC link
1037                 for the chosen runtime power management level.
1038
1039                 The file is read only.
1040
1041 What:           /sys/bus/platform/drivers/ufshcd/*/spm_lvl
1042 What:           /sys/bus/platform/devices/*.ufs/spm_lvl
1043 Date:           September 2014
1044 Contact:        Can Guo <quic_cang@quicinc.com>
1045 Description:    This entry could be used to set or show the UFS device
1046                 system power management level. The current driver
1047                 implementation supports 7 levels with next target states:
1048
1049                 ==  ====================================================
1050                 0   UFS device will stay active, UIC link will
1051                     stay active
1052                 1   UFS device will stay active, UIC link will
1053                     hibernate
1054                 2   UFS device will be moved to sleep, UIC link will
1055                     stay active
1056                 3   UFS device will be moved to sleep, UIC link will
1057                     hibernate
1058                 4   UFS device will be powered off, UIC link will
1059                     hibernate
1060                 5   UFS device will be powered off, UIC link will
1061                     be powered off
1062                 6   UFS device will be moved to deep sleep, UIC link
1063                     will be powered off. Note, deep sleep might not be
1064                     supported in which case this value will not be
1065                     accepted
1066                 ==  ====================================================
1067
1068 What:           /sys/bus/platform/drivers/ufshcd/*/spm_target_dev_state
1069 What:           /sys/bus/platform/devices/*.ufs/spm_target_dev_state
1070 Date:           February 2018
1071 Contact:        Can Guo <quic_cang@quicinc.com>
1072 Description:    This entry shows the target power mode of an UFS device
1073                 for the chosen system power management level.
1074
1075                 The file is read only.
1076
1077 What:           /sys/bus/platform/drivers/ufshcd/*/spm_target_link_state
1078 What:           /sys/bus/platform/devices/*.ufs/spm_target_link_state
1079 Date:           February 2018
1080 Contact:        Can Guo <quic_cang@quicinc.com>
1081 Description:    This entry shows the target state of an UFS UIC link
1082                 for the chosen system power management level.
1083
1084                 The file is read only.
1085
1086 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_enable
1087 What:           /sys/bus/platform/devices/*.ufs/monitor/monitor_enable
1088 Date:           January 2021
1089 Contact:        Can Guo <quic_cang@quicinc.com>
1090 Description:    This file shows the status of performance monitor enablement
1091                 and it can be used to start/stop the monitor. When the monitor
1092                 is stopped, the performance data collected is also cleared.
1093
1094 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/monitor_chunk_size
1095 What:           /sys/bus/platform/devices/*.ufs/monitor/monitor_chunk_size
1096 Date:           January 2021
1097 Contact:        Can Guo <quic_cang@quicinc.com>
1098 Description:    This file tells the monitor to focus on requests transferring
1099                 data of specific chunk size (in Bytes). 0 means any chunk size.
1100                 It can only be changed when monitor is disabled.
1101
1102 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_sectors
1103 What:           /sys/bus/platform/devices/*.ufs/monitor/read_total_sectors
1104 Date:           January 2021
1105 Contact:        Can Guo <quic_cang@quicinc.com>
1106 Description:    This file shows how many sectors (in 512 Bytes) have been
1107                 sent from device to host after monitor gets started.
1108
1109                 The file is read only.
1110
1111 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/read_total_busy
1112 What:           /sys/bus/platform/devices/*.ufs/monitor/read_total_busy
1113 Date:           January 2021
1114 Contact:        Can Guo <quic_cang@quicinc.com>
1115 Description:    This file shows how long (in micro seconds) has been spent
1116                 sending data from device to host after monitor gets started.
1117
1118                 The file is read only.
1119
1120 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/read_nr_requests
1121 What:           /sys/bus/platform/devices/*.ufs/monitor/read_nr_requests
1122 Date:           January 2021
1123 Contact:        Can Guo <quic_cang@quicinc.com>
1124 Description:    This file shows how many read requests have been sent after
1125                 monitor gets started.
1126
1127                 The file is read only.
1128
1129 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_max
1130 What:           /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_max
1131 Date:           January 2021
1132 Contact:        Can Guo <quic_cang@quicinc.com>
1133 Description:    This file shows the maximum latency (in micro seconds) of
1134                 read requests after monitor gets started.
1135
1136                 The file is read only.
1137
1138 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_min
1139 What:           /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_min
1140 Date:           January 2021
1141 Contact:        Can Guo <quic_cang@quicinc.com>
1142 Description:    This file shows the minimum latency (in micro seconds) of
1143                 read requests after monitor gets started.
1144
1145                 The file is read only.
1146
1147 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_avg
1148 What:           /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_avg
1149 Date:           January 2021
1150 Contact:        Can Guo <quic_cang@quicinc.com>
1151 Description:    This file shows the average latency (in micro seconds) of
1152                 read requests after monitor gets started.
1153
1154                 The file is read only.
1155
1156 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/read_req_latency_sum
1157 What:           /sys/bus/platform/devices/*.ufs/monitor/read_req_latency_sum
1158 Date:           January 2021
1159 Contact:        Can Guo <quic_cang@quicinc.com>
1160 Description:    This file shows the total latency (in micro seconds) of
1161                 read requests sent after monitor gets started.
1162
1163                 The file is read only.
1164
1165 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_sectors
1166 What:           /sys/bus/platform/devices/*.ufs/monitor/write_total_sectors
1167 Date:           January 2021
1168 Contact:        Can Guo <quic_cang@quicinc.com>
1169 Description:    This file shows how many sectors (in 512 Bytes) have been sent
1170                 from host to device after monitor gets started.
1171
1172                 The file is read only.
1173
1174 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/write_total_busy
1175 What:           /sys/bus/platform/devices/*.ufs/monitor/write_total_busy
1176 Date:           January 2021
1177 Contact:        Can Guo <quic_cang@quicinc.com>
1178 Description:    This file shows how long (in micro seconds) has been spent
1179                 sending data from host to device after monitor gets started.
1180
1181                 The file is read only.
1182
1183 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/write_nr_requests
1184 What:           /sys/bus/platform/devices/*.ufs/monitor/write_nr_requests
1185 Date:           January 2021
1186 Contact:        Can Guo <quic_cang@quicinc.com>
1187 Description:    This file shows how many write requests have been sent after
1188                 monitor gets started.
1189
1190                 The file is read only.
1191
1192 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_max
1193 What:           /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_max
1194 Date:           January 2021
1195 Contact:        Can Guo <quic_cang@quicinc.com>
1196 Description:    This file shows the maximum latency (in micro seconds) of write
1197                 requests after monitor gets started.
1198
1199                 The file is read only.
1200
1201 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_min
1202 What:           /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_min
1203 Date:           January 2021
1204 Contact:        Can Guo <quic_cang@quicinc.com>
1205 Description:    This file shows the minimum latency (in micro seconds) of write
1206                 requests after monitor gets started.
1207
1208                 The file is read only.
1209
1210 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_avg
1211 What:           /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_avg
1212 Date:           January 2021
1213 Contact:        Can Guo <quic_cang@quicinc.com>
1214 Description:    This file shows the average latency (in micro seconds) of write
1215                 requests after monitor gets started.
1216
1217                 The file is read only.
1218
1219 What:           /sys/bus/platform/drivers/ufshcd/*/monitor/write_req_latency_sum
1220 What:           /sys/bus/platform/devices/*.ufs/monitor/write_req_latency_sum
1221 Date:           January 2021
1222 Contact:        Can Guo <quic_cang@quicinc.com>
1223 Description:    This file shows the total latency (in micro seconds) of write
1224                 requests after monitor gets started.
1225
1226                 The file is read only.
1227
1228 What:           /sys/bus/platform/drivers/ufshcd/*/power_info/lane
1229 What:           /sys/bus/platform/devices/*.ufs/power_info/lane
1230 Date:           September 2023
1231 Contact:        Can Guo <quic_cang@quicinc.com>
1232 Description:    This file shows how many lanes are enabled on the UFS link,
1233                 i.e., an output 2 means UFS link is operating with 2 lanes.
1234
1235                 The file is read only.
1236
1237 What:           /sys/bus/platform/drivers/ufshcd/*/power_info/mode
1238 What:           /sys/bus/platform/devices/*.ufs/power_info/mode
1239 Date:           September 2023
1240 Contact:        Can Guo <quic_cang@quicinc.com>
1241 Description:    This file shows the PA power mode of UFS.
1242
1243                 The file is read only.
1244
1245 What:           /sys/bus/platform/drivers/ufshcd/*/power_info/rate
1246 What:           /sys/bus/platform/devices/*.ufs/power_info/rate
1247 Date:           September 2023
1248 Contact:        Can Guo <quic_cang@quicinc.com>
1249 Description:    This file shows the speed rate of UFS link.
1250
1251                 The file is read only.
1252
1253 What:           /sys/bus/platform/drivers/ufshcd/*/power_info/gear
1254 What:           /sys/bus/platform/devices/*.ufs/power_info/gear
1255 Date:           September 2023
1256 Contact:        Can Guo <quic_cang@quicinc.com>
1257 Description:    This file shows the gear of UFS link.
1258
1259                 The file is read only.
1260
1261 What:           /sys/bus/platform/drivers/ufshcd/*/power_info/dev_pm
1262 What:           /sys/bus/platform/devices/*.ufs/power_info/dev_pm
1263 Date:           September 2023
1264 Contact:        Can Guo <quic_cang@quicinc.com>
1265 Description:    This file shows the UFS device power mode.
1266
1267                 The file is read only.
1268
1269 What:           /sys/bus/platform/drivers/ufshcd/*/power_info/link_state
1270 What:           /sys/bus/platform/devices/*.ufs/power_info/link_state
1271 Date:           September 2023
1272 Contact:        Can Guo <quic_cang@quicinc.com>
1273 Description:    This file shows the state of UFS link.
1274
1275                 The file is read only.
1276
1277 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_presv_us_en
1278 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/wb_presv_us_en
1279 Date:           June 2020
1280 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1281 Description:    This entry shows if preserve user-space was configured
1282
1283                 The file is read only.
1284
1285 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_shared_alloc_units
1286 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/wb_shared_alloc_units
1287 Date:           June 2020
1288 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1289 Description:    This entry shows the shared allocated units of WB buffer
1290
1291                 The file is read only.
1292
1293 What:           /sys/bus/platform/drivers/ufshcd/*/device_descriptor/wb_type
1294 What:           /sys/bus/platform/devices/*.ufs/device_descriptor/wb_type
1295 Date:           June 2020
1296 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1297 Description:    This entry shows the configured WB type.
1298                 0x1 for shared buffer mode. 0x0 for dedicated buffer mode.
1299
1300                 The file is read only.
1301
1302 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_buff_cap_adj
1303 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_buff_cap_adj
1304 Date:           June 2020
1305 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1306 Description:    This entry shows the total user-space decrease in shared
1307                 buffer mode.
1308                 The value of this parameter is 3 for TLC NAND when SLC mode
1309                 is used as WriteBooster Buffer. 2 for MLC NAND.
1310
1311                 The file is read only.
1312
1313 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_alloc_units
1314 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_max_alloc_units
1315 Date:           June 2020
1316 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1317 Description:    This entry shows the Maximum total WriteBooster Buffer size
1318                 which is supported by the entire device.
1319
1320                 The file is read only.
1321
1322 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_max_wb_luns
1323 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_max_wb_luns
1324 Date:           June 2020
1325 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1326 Description:    This entry shows the maximum number of luns that can support
1327                 WriteBooster.
1328
1329                 The file is read only.
1330
1331 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_red_type
1332 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_sup_red_type
1333 Date:           June 2020
1334 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1335 Description:    The supportability of user space reduction mode
1336                 and preserve user space mode.
1337                 00h: WriteBooster Buffer can be configured only in
1338                 user space reduction type.
1339                 01h: WriteBooster Buffer can be configured only in
1340                 preserve user space type.
1341                 02h: Device can be configured in either user space
1342                 reduction type or preserve user space type.
1343
1344                 The file is read only.
1345
1346 What:           /sys/bus/platform/drivers/ufshcd/*/geometry_descriptor/wb_sup_wb_type
1347 What:           /sys/bus/platform/devices/*.ufs/geometry_descriptor/wb_sup_wb_type
1348 Date:           June 2020
1349 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1350 Description:    The supportability of WriteBooster Buffer type.
1351
1352                 ===  ==========================================================
1353                 00h  LU based WriteBooster Buffer configuration
1354                 01h  Single shared WriteBooster Buffer configuration
1355                 02h  Supporting both LU based WriteBooster.
1356                      Buffer and Single shared WriteBooster Buffer configuration
1357                 ===  ==========================================================
1358
1359                 The file is read only.
1360
1361 What:           /sys/bus/platform/drivers/ufshcd/*/flags/wb_enable
1362 What:           /sys/bus/platform/devices/*.ufs/flags/wb_enable
1363 Date:           June 2020
1364 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1365 Description:    This entry shows the status of WriteBooster.
1366
1367                 == ============================
1368                 0  WriteBooster is not enabled.
1369                 1  WriteBooster is enabled
1370                 == ============================
1371
1372                 The file is read only.
1373
1374 What:           /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_en
1375 What:           /sys/bus/platform/devices/*.ufs/flags/wb_flush_en
1376 Date:           June 2020
1377 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1378 Description:    This entry shows if flush is enabled.
1379
1380                 == =================================
1381                 0  Flush operation is not performed.
1382                 1  Flush operation is performed.
1383                 == =================================
1384
1385                 The file is read only.
1386
1387 What:           /sys/bus/platform/drivers/ufshcd/*/flags/wb_flush_during_h8
1388 What:           /sys/bus/platform/devices/*.ufs/flags/wb_flush_during_h8
1389 Date:           June 2020
1390 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1391 Description:    Flush WriteBooster Buffer during hibernate state.
1392
1393                 == =================================================
1394                 0  Device is not allowed to flush the
1395                    WriteBooster Buffer during link hibernate state.
1396                 1  Device is allowed to flush the
1397                    WriteBooster Buffer during link hibernate state.
1398                 == =================================================
1399
1400                 The file is read only.
1401
1402 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/wb_avail_buf
1403 What:           /sys/bus/platform/devices/*.ufs/attributes/wb_avail_buf
1404 Date:           June 2020
1405 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1406 Description:    This entry shows the amount of unused WriteBooster buffer
1407                 available.
1408
1409                 The file is read only.
1410
1411 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/wb_cur_buf
1412 What:           /sys/bus/platform/devices/*.ufs/attributes/wb_cur_buf
1413 Date:           June 2020
1414 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1415 Description:    This entry shows the amount of unused current buffer.
1416
1417                 The file is read only.
1418
1419 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/wb_flush_status
1420 What:           /sys/bus/platform/devices/*.ufs/attributes/wb_flush_status
1421 Date:           June 2020
1422 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1423 Description:    This entry shows the flush operation status.
1424
1425
1426                 ===  ======================================
1427                 00h  idle
1428                 01h  Flush operation in progress
1429                 02h  Flush operation stopped prematurely.
1430                 03h  Flush operation completed successfully
1431                 04h  Flush operation general failure
1432                 ===  ======================================
1433
1434                 The file is read only.
1435
1436 What:           /sys/bus/platform/drivers/ufshcd/*/attributes/wb_life_time_est
1437 What:           /sys/bus/platform/devices/*.ufs/attributes/wb_life_time_est
1438 Date:           June 2020
1439 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1440 Description:    This entry shows an indication of the WriteBooster Buffer
1441                 lifetime based on the amount of performed program/erase cycles
1442
1443                 ===  =============================================
1444                 01h  0% - 10% WriteBooster Buffer life time used
1445                 ...
1446                 0Ah  90% - 100% WriteBooster Buffer life time used
1447                 ===  =============================================
1448
1449                 The file is read only.
1450
1451 What:           /sys/class/scsi_device/*/device/unit_descriptor/wb_buf_alloc_units
1452 Date:           June 2020
1453 Contact:        Asutosh Das <quic_asutoshd@quicinc.com>
1454 Description:    This entry shows the configured size of WriteBooster buffer.
1455                 0400h corresponds to 4GB.
1456
1457                 The file is read only.
1458
1459 What:           /sys/bus/platform/drivers/ufshcd/*/wb_on
1460 What:           /sys/bus/platform/devices/*.ufs/wb_on
1461 Date:           January 2021
1462 Contact:        Bean Huo <beanhuo@micron.com>
1463 Description:    This node is used to set or display whether UFS WriteBooster is
1464                 enabled. Echo 0 to this file to disable UFS WriteBooster or 1 to
1465                 enable it. The WriteBooster is enabled after power-on/reset,
1466                 however, it will be disabled/enable while CLK scaling down/up
1467                 (if the platform supports UFSHCD_CAP_CLK_SCALING). For a
1468                 platform that doesn't support UFSHCD_CAP_CLK_SCALING, we can
1469                 disable/enable WriteBooster through this sysfs node.
1470
1471 What:           /sys/bus/platform/drivers/ufshcd/*/enable_wb_buf_flush
1472 What:           /sys/bus/platform/devices/*.ufs/enable_wb_buf_flush
1473 Date:           July 2022
1474 Contact:        Jinyoung Choi <j-young.choi@samsung.com>
1475 Description:    This entry shows the status of WriteBooster buffer flushing
1476                 and it can be used to enable or disable the flushing.
1477                 If flushing is enabled, the device executes the flush
1478                 operation when the command queue is empty.
1479
1480 What:           /sys/bus/platform/drivers/ufshcd/*/wb_flush_threshold
1481 What:           /sys/bus/platform/devices/*.ufs/wb_flush_threshold
1482 Date:           June 2023
1483 Contact:        Lu Hongfei <luhongfei@vivo.com>
1484 Description:
1485                 wb_flush_threshold represents the threshold for flushing WriteBooster buffer,
1486                 whose value expressed in unit of 10% granularity, such as '1' representing 10%,
1487                 '2' representing 20%, and so on.
1488                 If avail_wb_buff < wb_flush_threshold, it indicates that WriteBooster buffer needs to
1489                 be flushed, otherwise it is not necessary.
1490
1491 Contact:        Daniil Lunev <dlunev@chromium.org>
1492 What:           /sys/bus/platform/drivers/ufshcd/*/capabilities/
1493 What:           /sys/bus/platform/devices/*.ufs/capabilities/
1494 Date:           August 2022
1495 Description:    The group represents the effective capabilities of the
1496                 host-device pair. i.e. the capabilities which are enabled in the
1497                 driver for the specific host controller, supported by the host
1498                 controller and are supported and/or have compatible
1499                 configuration on the device side.
1500
1501 Contact:        Daniil Lunev <dlunev@chromium.org>
1502 What:           /sys/bus/platform/drivers/ufshcd/*/capabilities/clock_scaling
1503 What:           /sys/bus/platform/devices/*.ufs/capabilities/clock_scaling
1504 Date:           August 2022
1505 Contact:        Daniil Lunev <dlunev@chromium.org>
1506 Description:    Indicates status of clock scaling.
1507
1508                 == ============================
1509                 0  Clock scaling is not supported.
1510                 1  Clock scaling is supported.
1511                 == ============================
1512
1513                 The file is read only.
1514
1515 What:           /sys/bus/platform/drivers/ufshcd/*/capabilities/write_booster
1516 What:           /sys/bus/platform/devices/*.ufs/capabilities/write_booster
1517 Date:           August 2022
1518 Contact:        Daniil Lunev <dlunev@chromium.org>
1519 Description:    Indicates status of Write Booster.
1520
1521                 == ============================
1522                 0  Write Booster can not be enabled.
1523                 1  Write Booster can be enabled.
1524                 == ============================
1525
1526                 The file is read only.
1527
1528 What:           /sys/bus/platform/drivers/ufshcd/*/rtc_update_ms
1529 What:           /sys/bus/platform/devices/*.ufs/rtc_update_ms
1530 Date:           November 2023
1531 Contact:        Bean Huo <beanhuo@micron.com>
1532 Description:
1533                 rtc_update_ms indicates how often the host should synchronize or update the
1534                 UFS RTC. If set to 0, this will disable UFS RTC periodic update.
1535
1536 What:           /sys/devices/platform/.../ufshci_capabilities/version
1537 Date:           August 2024
1538 Contact:        Avri Altman <avri.altman@wdc.com>
1539 Description:
1540                 Host Capabilities register group: UFS version register.
1541                 Symbol - VER.  This file shows the UFSHCD version.
1542                 Example: Version 3.12 would be represented as 0000_0312h.
1543                 The file is read only.
1544
1545 What:           /sys/devices/platform/.../ufshci_capabilities/product_id
1546 Date:           August 2024
1547 Contact:        Avri Altman <avri.altman@wdc.com>
1548 Description:
1549                 Host Capabilities register group: product ID register.
1550                 Symbol - HCPID.  This file shows the UFSHCD product id.
1551                 The content of this register is vendor specific.
1552                 The file is read only.
1553
1554 What:           /sys/devices/platform/.../ufshci_capabilities/man_id
1555 Date:           August 2024
1556 Contact:        Avri Altman <avri.altman@wdc.com>
1557 Description:
1558                 Host Capabilities register group: manufacturer ID register.
1559                 Symbol - HCMID. This file shows the UFSHCD manufacturer id.
1560                 The Manufacturer ID is defined by JEDEC in JEDEC-JEP106.
1561                 The file is read only.