drivers/rtc/Kconfig

   1 #
   2 # RTC class/drivers configuration
   3 #
   4
   5 config RTC_LIB
   6         bool
   7
   8 menuconfig RTC_CLASS
   9         bool "Real Time Clock"
  10         default n
  11         depends on !S390 && !UML
  12         select RTC_LIB
  13         help
  14           Generic RTC class support. If you say yes here, you will
  15           be allowed to plug one or more RTCs to your system. You will
  16           probably want to enable one or more of the interfaces below.
  17
  18 if RTC_CLASS
  19
  20 config RTC_HCTOSYS
  21         bool "Set system time from RTC on startup and resume"
  22         default y
  23         help
  24           If you say yes here, the system time (wall clock) will be set using
  25           the value read from a specified RTC device. This is useful to avoid
  26           unnecessary fsck runs at boot time, and to network better.
  27
  28 config RTC_SYSTOHC
  29         bool "Set the RTC time based on NTP synchronization"
  30         default y
  31         help
  32           If you say yes here, the system time (wall clock) will be stored
  33           in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
  34           minutes if userspace reports synchronized NTP status.
  35
  36 config RTC_HCTOSYS_DEVICE
  37         string "RTC used to set the system time"
  38         depends on RTC_HCTOSYS = y || RTC_SYSTOHC = y
  39         default "rtc0"
  40         help
  41           The RTC device that will be used to (re)initialize the system
  42           clock, usually rtc0. Initialization is done when the system
  43           starts up, and when it resumes from a low power state. This
  44           device should record time in UTC, since the kernel won't do
  45           timezone correction.
  46
  47           The driver for this RTC device must be loaded before late_initcall
  48           functions run, so it must usually be statically linked.
  49
  50           This clock should be battery-backed, so that it reads the correct
  51           time when the system boots from a power-off state. Otherwise, your
  52           system will need an external clock source (like an NTP server).
  53
  54           If the clock you specify here is not battery backed, it may still
  55           be useful to reinitialize system time when resuming from system
  56           sleep states. Do not specify an RTC here unless it stays powered
  57           during all this system's supported sleep states.
  58
  59 config RTC_DEBUG
  60         bool "RTC debug support"
  61         help
  62           Say yes here to enable debugging support in the RTC framework
  63           and individual RTC drivers.
  64
  65 comment "RTC interfaces"
  66
  67 config RTC_INTF_SYSFS
  68         boolean "/sys/class/rtc/rtcN (sysfs)"
  69         depends on SYSFS
  70         default RTC_CLASS
  71         help
  72           Say yes here if you want to use your RTCs using sysfs interfaces,
  73           /sys/class/rtc/rtc0 through /sys/.../rtcN.
  74
  75           If unsure, say Y.
  76
  77 config RTC_INTF_PROC
  78         boolean "/proc/driver/rtc (procfs for rtcN)"
  79         depends on PROC_FS
  80         default RTC_CLASS
  81         help
  82           Say yes here if you want to use your system clock RTC through
  83           the proc interface, /proc/driver/rtc.
  84           Other RTCs will not be available through that API.
  85           If there is no RTC for the system clock, then the first RTC(rtc0)
  86           is used by default.
  87
  88           If unsure, say Y.
  89
  90 config RTC_INTF_DEV
  91         boolean "/dev/rtcN (character devices)"
  92         default RTC_CLASS
  93         help
  94           Say yes here if you want to use your RTCs using the /dev
  95           interfaces, which "udev" sets up as /dev/rtc0 through
  96           /dev/rtcN.
  97
  98           You may want to set up a symbolic link so one of these
  99           can be accessed as /dev/rtc, which is a name
 100           expected by "hwclock" and some other programs. Recent
 101           versions of "udev" are known to set up the symlink for you.
 102
 103           If unsure, say Y.
 104
 105 config RTC_INTF_DEV_UIE_EMUL
 106         bool "RTC UIE emulation on dev interface"
 107         depends on RTC_INTF_DEV
 108         help
 109           Provides an emulation for RTC_UIE if the underlying rtc chip
 110           driver does not expose RTC_UIE ioctls. Those requests generate
 111           once-per-second update interrupts, used for synchronization.
 112
 113           The emulation code will read the time from the hardware
 114           clock several times per second, please enable this option
 115           only if you know that you really need it.
 116
 117 config RTC_DRV_TEST
 118         tristate "Test driver/device"
 119         help
 120           If you say yes here you get support for the
 121           RTC test driver. It's a software RTC which can be
 122           used to test the RTC subsystem APIs. It gets
 123           the time from the system clock.
 124           You want this driver only if you are doing development
 125           on the RTC subsystem. Please read the source code
 126           for further details.
 127
 128           This driver can also be built as a module. If so, the module
 129           will be called rtc-test.
 130
 131 comment "I2C RTC drivers"
 132         depends on I2C
 133
 134 if I2C
 135
 136 config RTC_DRV_88PM860X
 137         tristate "Marvell 88PM860x"
 138         depends on I2C && MFD_88PM860X
 139         help
 140           If you say yes here you get support for RTC function in Marvell
 141           88PM860x chips.
 142
 143           This driver can also be built as a module. If so, the module
 144           will be called rtc-88pm860x.
 145
 146 config RTC_DRV_88PM80X
 147         tristate "Marvell 88PM80x"
 148         depends on I2C && MFD_88PM800
 149         help
 150           If you say yes here you get support for RTC function in Marvell
 151           88PM80x chips.
 152
 153           This driver can also be built as a module. If so, the module
 154           will be called rtc-88pm80x.
 155
 156 config RTC_DRV_AS3722
 157         tristate "ams AS3722 RTC driver"
 158         depends on MFD_AS3722
 159         help
 160           If you say yes here you get support for the RTC of ams AS3722 PMIC
 161           chips.
 162
 163           This driver can also be built as a module. If so, the module
 164           will be called rtc-as3722.
 165
 166 config RTC_DRV_DS1307
 167         tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
 168         help
 169           If you say yes here you get support for various compatible RTC
 170           chips (often with battery backup) connected with I2C. This driver
 171           should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
 172           EPSON RX-8025 and probably other chips. In some cases the RTC
 173           must already have been initialized (by manufacturing or a
 174           bootloader).
 175
 176           The first seven registers on these chips hold an RTC, and other
 177           registers may add features such as NVRAM, a trickle charger for
 178           the RTC/NVRAM backup power, and alarms. NVRAM is visible in
 179           sysfs, but other chip features may not be available.
 180
 181           This driver can also be built as a module. If so, the module
 182           will be called rtc-ds1307.
 183
 184 config RTC_DRV_DS1374
 185         tristate "Dallas/Maxim DS1374"
 186         depends on I2C
 187         help
 188           If you say yes here you get support for Dallas Semiconductor
 189           DS1374 real-time clock chips. If an interrupt is associated
 190           with the device, the alarm functionality is supported.
 191
 192           This driver can also be built as a module. If so, the module
 193           will be called rtc-ds1374.
 194
 195 config RTC_DRV_DS1672
 196         tristate "Dallas/Maxim DS1672"
 197         help
 198           If you say yes here you get support for the
 199           Dallas/Maxim DS1672 timekeeping chip.
 200
 201           This driver can also be built as a module. If so, the module
 202           will be called rtc-ds1672.
 203
 204 config RTC_DRV_DS3232
 205         tristate "Dallas/Maxim DS3232"
 206         depends on I2C
 207         help
 208           If you say yes here you get support for Dallas Semiconductor
 209           DS3232 real-time clock chips. If an interrupt is associated
 210           with the device, the alarm functionality is supported.
 211
 212           This driver can also be built as a module.  If so, the module
 213           will be called rtc-ds3232.
 214
 215 config RTC_DRV_HYM8563
 216         tristate "Haoyu Microelectronics HYM8563"
 217         depends on I2C && OF
 218         help
 219           Say Y to enable support for the HYM8563 I2C RTC chip. Apart
 220           from the usual rtc functions it provides a clock output of
 221           up to 32kHz.
 222
 223           This driver can also be built as a module. If so, the module
 224           will be called rtc-hym8563.
 225
 226 config RTC_DRV_LP8788
 227         tristate "TI LP8788 RTC driver"
 228         depends on MFD_LP8788
 229         help
 230           Say Y to enable support for the LP8788 RTC/ALARM driver.
 231
 232 config RTC_DRV_MAX6900
 233         tristate "Maxim MAX6900"
 234         help
 235           If you say yes here you will get support for the
 236           Maxim MAX6900 I2C RTC chip.
 237
 238           This driver can also be built as a module. If so, the module
 239           will be called rtc-max6900.
 240
 241 config RTC_DRV_MAX8907
 242         tristate "Maxim MAX8907"
 243         depends on MFD_MAX8907
 244         help
 245           If you say yes here you will get support for the
 246           RTC of Maxim MAX8907 PMIC.
 247
 248           This driver can also be built as a module. If so, the module
 249           will be called rtc-max8907.
 250
 251 config RTC_DRV_MAX8925
 252         tristate "Maxim MAX8925"
 253         depends on MFD_MAX8925
 254         help
 255           If you say yes here you will get support for the
 256           RTC of Maxim MAX8925 PMIC.
 257
 258           This driver can also be built as a module. If so, the module
 259           will be called rtc-max8925.
 260
 261 config RTC_DRV_MAX8998
 262         tristate "Maxim MAX8998"
 263         depends on MFD_MAX8998
 264         help
 265           If you say yes here you will get support for the
 266           RTC of Maxim MAX8998 PMIC.
 267
 268           This driver can also be built as a module. If so, the module
 269           will be called rtc-max8998.
 270
 271 config RTC_DRV_MAX8997
 272         tristate "Maxim MAX8997"
 273         depends on MFD_MAX8997
 274         help
 275           If you say yes here you will get support for the
 276           RTC of Maxim MAX8997 PMIC.
 277
 278           This driver can also be built as a module. If so, the module
 279           will be called rtc-max8997.
 280
 281 config RTC_DRV_MAX77686
 282         tristate "Maxim MAX77686"
 283         depends on MFD_MAX77686
 284         help
 285           If you say yes here you will get support for the
 286           RTC of Maxim MAX77686 PMIC.
 287
 288           This driver can also be built as a module. If so, the module
 289           will be called rtc-max77686.
 290
 291 config RTC_DRV_RS5C372
 292         tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
 293         help
 294           If you say yes here you get support for the
 295           Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
 296
 297           This driver can also be built as a module. If so, the module
 298           will be called rtc-rs5c372.
 299
 300 config RTC_DRV_ISL1208
 301         tristate "Intersil ISL1208"
 302         help
 303           If you say yes here you get support for the
 304           Intersil ISL1208 RTC chip.
 305
 306           This driver can also be built as a module. If so, the module
 307           will be called rtc-isl1208.
 308
 309 config RTC_DRV_ISL12022
 310         tristate "Intersil ISL12022"
 311         help
 312           If you say yes here you get support for the
 313           Intersil ISL12022 RTC chip.
 314
 315           This driver can also be built as a module. If so, the module
 316           will be called rtc-isl12022.
 317
 318 config RTC_DRV_ISL12057
 319        depends on I2C
 320        select REGMAP_I2C
 321        tristate "Intersil ISL12057"
 322        help
 323           If you say yes here you get support for the Intersil ISL12057
 324           I2C RTC chip.
 325
 326           This driver can also be built as a module. If so, the module
 327           will be called rtc-isl12057.
 328
 329 config RTC_DRV_X1205
 330         tristate "Xicor/Intersil X1205"
 331         help
 332           If you say yes here you get support for the
 333           Xicor/Intersil X1205 RTC chip.
 334
 335           This driver can also be built as a module. If so, the module
 336           will be called rtc-x1205.
 337
 338 config RTC_DRV_PALMAS
 339         tristate "TI Palmas RTC driver"
 340         depends on MFD_PALMAS
 341         help
 342           If you say yes here you get support for the RTC of TI PALMA series PMIC
 343           chips.
 344
 345           This driver can also be built as a module. If so, the module
 346           will be called rtc-palma.
 347
 348 config RTC_DRV_PCF2127
 349         tristate "NXP PCF2127"
 350         help
 351           If you say yes here you get support for the NXP PCF2127/29 RTC
 352           chips.
 353
 354           This driver can also be built as a module. If so, the module
 355           will be called rtc-pcf2127.
 356
 357 config RTC_DRV_PCF8523
 358         tristate "NXP PCF8523"
 359         help
 360           If you say yes here you get support for the NXP PCF8523 RTC
 361           chips.
 362
 363           This driver can also be built as a module. If so, the module
 364           will be called rtc-pcf8523.
 365
 366 config RTC_DRV_PCF8563
 367         tristate "Philips PCF8563/Epson RTC8564"
 368         help
 369           If you say yes here you get support for the
 370           Philips PCF8563 RTC chip. The Epson RTC8564
 371           should work as well.
 372
 373           This driver can also be built as a module. If so, the module
 374           will be called rtc-pcf8563.
 375
 376 config RTC_DRV_PCF8583
 377         tristate "Philips PCF8583"
 378         help
 379           If you say yes here you get support for the Philips PCF8583
 380           RTC chip found on Acorn RiscPCs. This driver supports the
 381           platform specific method of retrieving the current year from
 382           the RTC's SRAM. It will work on other platforms with the same
 383           chip, but the year will probably have to be tweaked.
 384
 385           This driver can also be built as a module. If so, the module
 386           will be called rtc-pcf8583.
 387
 388 config RTC_DRV_M41T80
 389         tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible"
 390         help
 391           If you say Y here you will get support for the ST M41T60
 392           and M41T80 RTC chips series. Currently, the following chips are
 393           supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
 394           M41ST85, M41ST87, and MicroCrystal RV4162.
 395
 396           This driver can also be built as a module. If so, the module
 397           will be called rtc-m41t80.
 398
 399 config RTC_DRV_M41T80_WDT
 400         bool "ST M41T65/M41T80 series RTC watchdog timer"
 401         depends on RTC_DRV_M41T80
 402         help
 403           If you say Y here you will get support for the
 404           watchdog timer in the ST M41T60 and M41T80 RTC chips series.
 405
 406 config RTC_DRV_BQ32K
 407         tristate "TI BQ32000"
 408         help
 409           If you say Y here you will get support for the TI
 410           BQ32000 I2C RTC chip.
 411
 412           This driver can also be built as a module. If so, the module
 413           will be called rtc-bq32k.
 414
 415 config RTC_DRV_DM355EVM
 416         tristate "TI DaVinci DM355 EVM RTC"
 417         depends on MFD_DM355EVM_MSP
 418         help
 419           Supports the RTC firmware in the MSP430 on the DM355 EVM.
 420
 421 config RTC_DRV_TWL92330
 422         boolean "TI TWL92330/Menelaus"
 423         depends on MENELAUS
 424         help
 425           If you say yes here you get support for the RTC on the
 426           TWL92330 "Menelaus" power management chip, used with OMAP2
 427           platforms. The support is integrated with the rest of
 428           the Menelaus driver; it's not separate module.
 429
 430 config RTC_DRV_TWL4030
 431         tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
 432         depends on TWL4030_CORE
 433         help
 434           If you say yes here you get support for the RTC on the
 435           TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
 436
 437           This driver can also be built as a module. If so, the module
 438           will be called rtc-twl.
 439
 440 config RTC_DRV_TPS6586X
 441         tristate "TI TPS6586X RTC driver"
 442         depends on MFD_TPS6586X
 443         help
 444           TI Power Management IC TPS6586X supports RTC functionality
 445           along with alarm. This driver supports the RTC driver for
 446           the TPS6586X RTC module.
 447
 448 config RTC_DRV_TPS65910
 449         tristate "TI TPS65910 RTC driver"
 450         depends on RTC_CLASS && MFD_TPS65910
 451         help
 452           If you say yes here you get support for the RTC on the
 453           TPS65910 chips.
 454
 455           This driver can also be built as a module. If so, the module
 456           will be called rtc-tps65910.
 457
 458 config RTC_DRV_TPS80031
 459         tristate "TI TPS80031/TPS80032 RTC driver"
 460         depends on MFD_TPS80031
 461         help
 462           TI Power Management IC TPS80031 supports RTC functionality
 463           along with alarm. This driver supports the RTC driver for
 464           the TPS80031 RTC module.
 465
 466 config RTC_DRV_RC5T583
 467         tristate "RICOH 5T583 RTC driver"
 468         depends on MFD_RC5T583
 469         help
 470           If you say yes here you get support for the RTC on the
 471           RICOH 5T583 chips.
 472
 473           This driver can also be built as a module. If so, the module
 474           will be called rtc-rc5t583.
 475
 476 config RTC_DRV_S35390A
 477         tristate "Seiko Instruments S-35390A"
 478         select BITREVERSE
 479         help
 480           If you say yes here you will get support for the Seiko
 481           Instruments S-35390A.
 482
 483           This driver can also be built as a module. If so the module
 484           will be called rtc-s35390a.
 485
 486 config RTC_DRV_FM3130
 487         tristate "Ramtron FM3130"
 488         help
 489           If you say Y here you will get support for the
 490           Ramtron FM3130 RTC chips.
 491           Ramtron FM3130 is a chip with two separate devices inside,
 492           RTC clock and FRAM. This driver provides only RTC functionality.
 493
 494           This driver can also be built as a module. If so the module
 495           will be called rtc-fm3130.
 496
 497 config RTC_DRV_RX8581
 498         tristate "Epson RX-8581"
 499         help
 500           If you say yes here you will get support for the Epson RX-8581.
 501
 502           This driver can also be built as a module. If so the module
 503           will be called rtc-rx8581.
 504
 505 config RTC_DRV_RX8025
 506         tristate "Epson RX-8025SA/NB"
 507         help
 508           If you say yes here you get support for the Epson
 509           RX-8025SA/NB RTC chips.
 510
 511           This driver can also be built as a module. If so, the module
 512           will be called rtc-rx8025.
 513
 514 config RTC_DRV_EM3027
 515         tristate "EM Microelectronic EM3027"
 516         help
 517           If you say yes here you get support for the EM
 518           Microelectronic EM3027 RTC chips.
 519
 520           This driver can also be built as a module. If so, the module
 521           will be called rtc-em3027.
 522
 523 config RTC_DRV_RV3029C2
 524         tristate "Micro Crystal RTC"
 525         help
 526           If you say yes here you get support for the Micro Crystal
 527           RV3029-C2 RTC chips.
 528
 529           This driver can also be built as a module. If so, the module
 530           will be called rtc-rv3029c2.
 531
 532 config RTC_DRV_S5M
 533         tristate "Samsung S5M series"
 534         depends on MFD_SEC_CORE
 535         help
 536           If you say yes here you will get support for the
 537           RTC of Samsung S5M PMIC series.
 538
 539           This driver can also be built as a module. If so, the module
 540           will be called rtc-s5m.
 541
 542 endif # I2C
 543
 544 comment "SPI RTC drivers"
 545
 546 if SPI_MASTER
 547
 548 config RTC_DRV_M41T93
 549         tristate "ST M41T93"
 550         help
 551           If you say yes here you will get support for the
 552           ST M41T93 SPI RTC chip.
 553
 554           This driver can also be built as a module. If so, the module
 555           will be called rtc-m41t93.
 556
 557 config RTC_DRV_M41T94
 558         tristate "ST M41T94"
 559         help
 560           If you say yes here you will get support for the
 561           ST M41T94 SPI RTC chip.
 562
 563           This driver can also be built as a module. If so, the module
 564           will be called rtc-m41t94.
 565
 566 config RTC_DRV_DS1305
 567         tristate "Dallas/Maxim DS1305/DS1306"
 568         help
 569           Select this driver to get support for the Dallas/Maxim DS1305
 570           and DS1306 real time clock chips. These support a trickle
 571           charger, alarms, and NVRAM in addition to the clock.
 572
 573           This driver can also be built as a module. If so, the module
 574           will be called rtc-ds1305.
 575
 576 config RTC_DRV_DS1343
 577         select REGMAP_SPI
 578         tristate "Dallas/Maxim DS1343/DS1344"
 579         help
 580           If you say yes here you get support for the
 581           Dallas/Maxim DS1343 and DS1344 real time clock chips.
 582           Support for trickle charger, alarm is provided.
 583
 584           This driver can also be built as a module. If so, the module
 585           will be called rtc-ds1343.
 586
 587 config RTC_DRV_DS1347
 588         tristate "Dallas/Maxim DS1347"
 589         help
 590           If you say yes here you get support for the
 591           Dallas/Maxim DS1347 chips.
 592
 593           This driver only supports the RTC feature, and not other chip
 594           features such as alarms.
 595
 596           This driver can also be built as a module. If so, the module
 597           will be called rtc-ds1347.
 598
 599 config RTC_DRV_DS1390
 600         tristate "Dallas/Maxim DS1390/93/94"
 601         help
 602           If you say yes here you get support for the
 603           Dallas/Maxim DS1390/93/94 chips.
 604
 605           This driver only supports the RTC feature, and not other chip
 606           features such as alarms and trickle charging.
 607
 608           This driver can also be built as a module. If so, the module
 609           will be called rtc-ds1390.
 610
 611 config RTC_DRV_MAX6902
 612         tristate "Maxim MAX6902"
 613         help
 614           If you say yes here you will get support for the
 615           Maxim MAX6902 SPI RTC chip.
 616
 617           This driver can also be built as a module. If so, the module
 618           will be called rtc-max6902.
 619
 620 config RTC_DRV_R9701
 621         tristate "Epson RTC-9701JE"
 622         help
 623           If you say yes here you will get support for the
 624           Epson RTC-9701JE SPI RTC chip.
 625
 626           This driver can also be built as a module. If so, the module
 627           will be called rtc-r9701.
 628
 629 config RTC_DRV_RS5C348
 630         tristate "Ricoh RS5C348A/B"
 631         help
 632           If you say yes here you get support for the
 633           Ricoh RS5C348A and RS5C348B RTC chips.
 634
 635           This driver can also be built as a module. If so, the module
 636           will be called rtc-rs5c348.
 637
 638 config RTC_DRV_DS3234
 639         tristate "Maxim/Dallas DS3234"
 640         help
 641           If you say yes here you get support for the
 642           Maxim/Dallas DS3234 SPI RTC chip.
 643
 644           This driver can also be built as a module. If so, the module
 645           will be called rtc-ds3234.
 646
 647 config RTC_DRV_PCF2123
 648         tristate "NXP PCF2123"
 649         help
 650           If you say yes here you get support for the NXP PCF2123
 651           RTC chip.
 652
 653           This driver can also be built as a module. If so, the module
 654           will be called rtc-pcf2123.
 655
 656 config RTC_DRV_RX4581
 657         tristate "Epson RX-4581"
 658         help
 659           If you say yes here you will get support for the Epson RX-4581.
 660
 661           This driver can also be built as a module. If so the module
 662           will be called rtc-rx4581.
 663
 664 config RTC_DRV_MCP795
 665         tristate "Microchip MCP795"
 666         help
 667           If you say yes here you will get support for the Microchip MCP795.
 668
 669           This driver can also be built as a module. If so the module
 670           will be called rtc-mcp795.
 671
 672 endif # SPI_MASTER
 673
 674 comment "Platform RTC drivers"
 675
 676 # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
 677 # requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
 678 # global rtc_lock ... it's not yet just another platform_device.
 679
 680 config RTC_DRV_CMOS
 681         tristate "PC-style 'CMOS'"
 682         depends on X86 || ARM || M32R || PPC || MIPS || SPARC64
 683         default y if X86
 684         help
 685           Say "yes" here to get direct support for the real time clock
 686           found in every PC or ACPI-based system, and some other boards.
 687           Specifically the original MC146818, compatibles like those in
 688           PC south bridges, the DS12887 or M48T86, some multifunction
 689           or LPC bus chips, and so on.
 690
 691           Your system will need to define the platform device used by
 692           this driver, otherwise it won't be accessible. This means
 693           you can safely enable this driver if you don't know whether
 694           or not your board has this kind of hardware.
 695
 696           This driver can also be built as a module. If so, the module
 697           will be called rtc-cmos.
 698
 699 config RTC_DRV_ALPHA
 700         bool "Alpha PC-style CMOS"
 701         depends on ALPHA
 702         default y
 703         help
 704           Direct support for the real-time clock found on every Alpha
 705           system, specifically MC146818 compatibles.  If in doubt, say Y.
 706
 707 config RTC_DRV_VRTC
 708         tristate "Virtual RTC for Intel MID platforms"
 709         depends on X86_INTEL_MID
 710         default y if X86_INTEL_MID
 711
 712         help
 713         Say "yes" here to get direct support for the real time clock
 714         found on Moorestown platforms. The VRTC is a emulated RTC that
 715         derives its clock source from a real RTC in the PMIC. The MC146818
 716         style programming interface is mostly conserved, but any
 717         updates are done via IPC calls to the system controller FW.
 718
 719 config RTC_DRV_DS1216
 720         tristate "Dallas DS1216"
 721         depends on SNI_RM
 722         help
 723           If you say yes here you get support for the Dallas DS1216 RTC chips.
 724
 725 config RTC_DRV_DS1286
 726         tristate "Dallas DS1286"
 727         help
 728           If you say yes here you get support for the Dallas DS1286 RTC chips.
 729
 730 config RTC_DRV_DS1302
 731         tristate "Dallas DS1302"
 732         depends on SH_SECUREEDGE5410
 733         help
 734           If you say yes here you get support for the Dallas DS1302 RTC chips.
 735
 736 config RTC_DRV_DS1511
 737         tristate "Dallas DS1511"
 738         help
 739           If you say yes here you get support for the
 740           Dallas DS1511 timekeeping/watchdog chip.
 741
 742           This driver can also be built as a module. If so, the module
 743           will be called rtc-ds1511.
 744
 745 config RTC_DRV_DS1553
 746         tristate "Maxim/Dallas DS1553"
 747         help
 748           If you say yes here you get support for the
 749           Maxim/Dallas DS1553 timekeeping chip.
 750
 751           This driver can also be built as a module. If so, the module
 752           will be called rtc-ds1553.
 753
 754 config RTC_DRV_DS1742
 755         tristate "Maxim/Dallas DS1742/1743"
 756         help
 757           If you say yes here you get support for the
 758           Maxim/Dallas DS1742/1743 timekeeping chip.
 759
 760           This driver can also be built as a module. If so, the module
 761           will be called rtc-ds1742.
 762
 763 config RTC_DRV_DA9052
 764         tristate "Dialog DA9052/DA9053 RTC"
 765         depends on PMIC_DA9052
 766         help
 767           Say y here to support the RTC driver for Dialog Semiconductor
 768           DA9052-BC and DA9053-AA/Bx PMICs.
 769
 770 config RTC_DRV_DA9055
 771         tristate "Dialog Semiconductor DA9055 RTC"
 772         depends on MFD_DA9055
 773         help
 774           If you say yes here you will get support for the
 775           RTC of the Dialog DA9055 PMIC.
 776
 777           This driver can also be built as a module. If so, the module
 778           will be called rtc-da9055
 779
 780 config RTC_DRV_EFI
 781         tristate "EFI RTC"
 782         depends on IA64
 783         help
 784           If you say yes here you will get support for the EFI
 785           Real Time Clock.
 786
 787           This driver can also be built as a module. If so, the module
 788           will be called rtc-efi.
 789
 790 config RTC_DRV_STK17TA8
 791         tristate "Simtek STK17TA8"
 792         help
 793           If you say yes here you get support for the
 794           Simtek STK17TA8 timekeeping chip.
 795
 796           This driver can also be built as a module. If so, the module
 797           will be called rtc-stk17ta8.
 798
 799 config RTC_DRV_M48T86
 800         tristate "ST M48T86/Dallas DS12887"
 801         help
 802           If you say Y here you will get support for the
 803           ST M48T86 and Dallas DS12887 RTC chips.
 804
 805           This driver can also be built as a module. If so, the module
 806           will be called rtc-m48t86.
 807
 808 config RTC_DRV_M48T35
 809         tristate "ST M48T35"
 810         help
 811           If you say Y here you will get support for the
 812           ST M48T35 RTC chip.
 813
 814           This driver can also be built as a module, if so, the module
 815           will be called "rtc-m48t35".
 816
 817 config RTC_DRV_M48T59
 818         tristate "ST M48T59/M48T08/M48T02"
 819         help
 820           If you say Y here you will get support for the
 821           ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
 822
 823           These chips are usually found in Sun SPARC and UltraSPARC
 824           workstations.
 825
 826           This driver can also be built as a module, if so, the module
 827           will be called "rtc-m48t59".
 828
 829 config RTC_DRV_MSM6242
 830         tristate "Oki MSM6242"
 831         help
 832           If you say yes here you get support for the Oki MSM6242
 833           timekeeping chip. It is used in some Amiga models (e.g. A2000).
 834
 835           This driver can also be built as a module. If so, the module
 836           will be called rtc-msm6242.
 837
 838 config RTC_DRV_BQ4802
 839         tristate "TI BQ4802"
 840         help
 841           If you say Y here you will get support for the TI
 842           BQ4802 RTC chip.
 843
 844           This driver can also be built as a module. If so, the module
 845           will be called rtc-bq4802.
 846
 847 config RTC_DRV_RP5C01
 848         tristate "Ricoh RP5C01"
 849         help
 850           If you say yes here you get support for the Ricoh RP5C01
 851           timekeeping chip. It is used in some Amiga models (e.g. A3000
 852           and A4000).
 853
 854           This driver can also be built as a module. If so, the module
 855           will be called rtc-rp5c01.
 856
 857 config RTC_DRV_V3020
 858         tristate "EM Microelectronic V3020"
 859         help
 860           If you say yes here you will get support for the
 861           EM Microelectronic v3020 RTC chip.
 862
 863           This driver can also be built as a module. If so, the module
 864           will be called rtc-v3020.
 865
 866 config RTC_DRV_DS2404
 867         tristate "Dallas DS2404"
 868         help
 869           If you say yes here you get support for the
 870           Dallas DS2404 RTC chip.
 871
 872           This driver can also be built as a module. If so, the module
 873           will be called rtc-ds2404.
 874
 875 config RTC_DRV_WM831X
 876         tristate "Wolfson Microelectronics WM831x RTC"
 877         depends on MFD_WM831X
 878         help
 879           If you say yes here you will get support for the RTC subsystem
 880           of the Wolfson Microelectronics WM831X series PMICs.
 881
 882           This driver can also be built as a module. If so, the module
 883           will be called "rtc-wm831x".
 884
 885 config RTC_DRV_WM8350
 886         tristate "Wolfson Microelectronics WM8350 RTC"
 887         depends on MFD_WM8350
 888         help
 889           If you say yes here you will get support for the RTC subsystem
 890           of the Wolfson Microelectronics WM8350.
 891
 892           This driver can also be built as a module. If so, the module
 893           will be called "rtc-wm8350".
 894
 895 config RTC_DRV_SPEAR
 896         tristate "SPEAR ST RTC"
 897         depends on PLAT_SPEAR
 898         default y
 899         help
 900          If you say Y here you will get support for the RTC found on
 901          spear
 902
 903 config RTC_DRV_PCF50633
 904         depends on MFD_PCF50633
 905         tristate "NXP PCF50633 RTC"
 906         help
 907           If you say yes here you get support for the RTC subsystem of the
 908           NXP PCF50633 used in embedded systems.
 909
 910 config RTC_DRV_AB3100
 911         tristate "ST-Ericsson AB3100 RTC"
 912         depends on AB3100_CORE
 913         default y if AB3100_CORE
 914         help
 915           Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
 916           support. This chip contains a battery- and capacitor-backed RTC.
 917
 918 config RTC_DRV_AB8500
 919         tristate "ST-Ericsson AB8500 RTC"
 920         depends on AB8500_CORE
 921         select RTC_INTF_DEV
 922         select RTC_INTF_DEV_UIE_EMUL
 923         help
 924           Select this to enable the ST-Ericsson AB8500 power management IC RTC
 925           support. This chip contains a battery- and capacitor-backed RTC.
 926
 927 config RTC_DRV_NUC900
 928         tristate "NUC910/NUC920 RTC driver"
 929         depends on ARCH_W90X900
 930         help
 931           If you say yes here you get support for the RTC subsystem of the
 932           NUC910/NUC920 used in embedded systems.
 933
 934 comment "on-CPU RTC drivers"
 935
 936 config RTC_DRV_DAVINCI
 937         tristate "TI DaVinci RTC"
 938         depends on ARCH_DAVINCI_DM365
 939         help
 940           If you say yes here you get support for the RTC on the
 941           DaVinci platforms (DM365).
 942
 943           This driver can also be built as a module. If so, the module
 944           will be called rtc-davinci.
 945
 946 config RTC_DRV_IMXDI
 947         tristate "Freescale IMX DryIce Real Time Clock"
 948         depends on ARCH_MXC
 949         help
 950            Support for Freescale IMX DryIce RTC
 951
 952            This driver can also be built as a module, if so, the module
 953            will be called "rtc-imxdi".
 954
 955 config RTC_DRV_OMAP
 956         tristate "TI OMAP1"
 957         depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX || SOC_AM33XX
 958         help
 959           Say "yes" here to support the on chip real time clock
 960           present on TI OMAP1, AM33xx and DA8xx/OMAP-L13x.
 961
 962           This driver can also be built as a module, if so, module
 963           will be called rtc-omap.
 964
 965 config HAVE_S3C_RTC
 966         bool
 967         help
 968           This will include RTC support for Samsung SoCs. If
 969           you want to include RTC support for any machine, kindly
 970           select this in the respective mach-XXXX/Kconfig file.
 971
 972 config RTC_DRV_S3C
 973         tristate "Samsung S3C series SoC RTC"
 974         depends on ARCH_S3C64XX || HAVE_S3C_RTC
 975         help
 976           RTC (Realtime Clock) driver for the clock inbuilt into the
 977           Samsung S3C24XX series of SoCs. This can provide periodic
 978           interrupt rates from 1Hz to 64Hz for user programs, and
 979           wakeup from Alarm.
 980
 981           The driver currently supports the common features on all the
 982           S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
 983           and S3C2442.
 984
 985           This driver can also be build as a module. If so, the module
 986           will be called rtc-s3c.
 987
 988 config RTC_DRV_EP93XX
 989         tristate "Cirrus Logic EP93XX"
 990         depends on ARCH_EP93XX
 991         help
 992           If you say yes here you get support for the
 993           RTC embedded in the Cirrus Logic EP93XX processors.
 994
 995           This driver can also be built as a module. If so, the module
 996           will be called rtc-ep93xx.
 997
 998 config RTC_DRV_SA1100
 999         tristate "SA11x0/PXA2xx/PXA910"
1000         depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
1001         help
1002           If you say Y here you will get access to the real time clock
1003           built into your SA11x0 or PXA2xx CPU.
1004
1005           To compile this driver as a module, choose M here: the
1006           module will be called rtc-sa1100.
1007
1008 config RTC_DRV_SH
1009         tristate "SuperH On-Chip RTC"
1010         depends on SUPERH && HAVE_CLK
1011         help
1012           Say Y here to enable support for the on-chip RTC found in
1013           most SuperH processors.
1014
1015           To compile this driver as a module, choose M here: the
1016           module will be called rtc-sh.
1017
1018 config RTC_DRV_VR41XX
1019         tristate "NEC VR41XX"
1020         depends on CPU_VR41XX
1021         help
1022           If you say Y here you will get access to the real time clock
1023           built into your NEC VR41XX CPU.
1024
1025           To compile this driver as a module, choose M here: the
1026           module will be called rtc-vr41xx.
1027
1028 config RTC_DRV_PL030
1029         tristate "ARM AMBA PL030 RTC"
1030         depends on ARM_AMBA
1031         help
1032           If you say Y here you will get access to ARM AMBA
1033           PrimeCell PL030 RTC found on certain ARM SOCs.
1034
1035           To compile this driver as a module, choose M here: the
1036           module will be called rtc-pl030.
1037
1038 config RTC_DRV_PL031
1039         tristate "ARM AMBA PL031 RTC"
1040         depends on ARM_AMBA
1041         help
1042           If you say Y here you will get access to ARM AMBA
1043           PrimeCell PL031 RTC found on certain ARM SOCs.
1044
1045           To compile this driver as a module, choose M here: the
1046           module will be called rtc-pl031.
1047
1048 config RTC_DRV_AT32AP700X
1049         tristate "AT32AP700X series RTC"
1050         depends on PLATFORM_AT32AP
1051         help
1052           Driver for the internal RTC (Realtime Clock) on Atmel AVR32
1053           AT32AP700x family processors.
1054
1055 config RTC_DRV_AT91RM9200
1056         tristate "AT91RM9200 or some AT91SAM9 RTC"
1057         depends on ARCH_AT91
1058         help
1059           Driver for the internal RTC (Realtime Clock) module found on
1060           Atmel AT91RM9200's and some  AT91SAM9 chips. On AT91SAM9 chips
1061           this is powered by the backup power supply.
1062
1063 config RTC_DRV_AT91SAM9
1064         tristate "AT91SAM9x/AT91CAP9 RTT as RTC"
1065         depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
1066         help
1067           RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
1068           (Real Time Timer). These timers are powered by the backup power
1069           supply (such as a small coin cell battery), but do not need to
1070           be used as RTCs.
1071
1072           (On AT91SAM9rl and AT91SAM9G45 chips you probably want to use the
1073           dedicated RTC module and leave the RTT available for other uses.)
1074
1075 config RTC_DRV_AT91SAM9_RTT
1076         int
1077         range 0 1
1078         default 0
1079         prompt "RTT module Number" if ARCH_AT91SAM9263
1080         depends on RTC_DRV_AT91SAM9
1081         help
1082           More than one RTT module is available. You can choose which
1083           one will be used as an RTC. The default of zero is normally
1084           OK to use, though some systems use that for non-RTC purposes.
1085
1086 config RTC_DRV_AT91SAM9_GPBR
1087         int
1088         range 0 3 if !ARCH_AT91SAM9263
1089         range 0 15 if ARCH_AT91SAM9263
1090         default 0
1091         prompt "Backup Register Number"
1092         depends on RTC_DRV_AT91SAM9
1093         help
1094           The RTC driver needs to use one of the General Purpose Backup
1095           Registers (GPBRs) as well as the RTT. You can choose which one
1096           will be used. The default of zero is normally OK to use, but
1097           on some systems other software needs to use that register.
1098
1099 config RTC_DRV_AU1XXX
1100         tristate "Au1xxx Counter0 RTC support"
1101         depends on MIPS_ALCHEMY
1102         help
1103           This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1104           counter) to be used as a RTC.
1105
1106           This driver can also be built as a module. If so, the module
1107           will be called rtc-au1xxx.
1108
1109 config RTC_DRV_BFIN
1110         tristate "Blackfin On-Chip RTC"
1111         depends on BLACKFIN && !BF561
1112         help
1113           If you say yes here you will get support for the
1114           Blackfin On-Chip Real Time Clock.
1115
1116           This driver can also be built as a module. If so, the module
1117           will be called rtc-bfin.
1118
1119 config RTC_DRV_RS5C313
1120         tristate "Ricoh RS5C313"
1121         depends on SH_LANDISK
1122         help
1123           If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1124
1125 config RTC_DRV_GENERIC
1126         tristate "Generic RTC support"
1127         # Please consider writing a new RTC driver instead of using the generic
1128         # RTC abstraction
1129         depends on PARISC || M68K || PPC || SUPERH32
1130         help
1131           Say Y or M here to enable RTC support on systems using the generic
1132           RTC abstraction. If you do not know what you are doing, you should
1133           just say Y.
1134
1135 config RTC_DRV_PXA
1136        tristate "PXA27x/PXA3xx"
1137        depends on ARCH_PXA
1138        help
1139          If you say Y here you will get access to the real time clock
1140          built into your PXA27x or PXA3xx CPU.
1141
1142          This RTC driver uses PXA RTC registers available since pxa27x
1143          series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1144
1145 config RTC_DRV_VT8500
1146         tristate "VIA/WonderMedia 85xx SoC RTC"
1147         depends on ARCH_VT8500
1148         help
1149           If you say Y here you will get access to the real time clock
1150           built into your VIA VT8500 SoC or its relatives.
1151
1152
1153 config RTC_DRV_SUN4V
1154         bool "SUN4V Hypervisor RTC"
1155         depends on SPARC64
1156         help
1157           If you say Y here you will get support for the Hypervisor
1158           based RTC on SUN4V systems.
1159
1160 config RTC_DRV_SUNXI
1161         tristate "Allwinner sun4i/sun7i RTC"
1162         depends on ARCH_SUNXI
1163         help
1164           If you say Y here you will get support for the RTC found on
1165           Allwinner A10/A20.
1166
1167 config RTC_DRV_STARFIRE
1168         bool "Starfire RTC"
1169         depends on SPARC64
1170         help
1171           If you say Y here you will get support for the RTC found on
1172           Starfire systems.
1173
1174 config RTC_DRV_TX4939
1175         tristate "TX4939 SoC"
1176         depends on SOC_TX4939
1177         help
1178           Driver for the internal RTC (Realtime Clock) module found on
1179           Toshiba TX4939 SoC.
1180
1181 config RTC_DRV_MV
1182         tristate "Marvell SoC RTC"
1183         depends on ARCH_KIRKWOOD || ARCH_DOVE || ARCH_MVEBU
1184         help
1185           If you say yes here you will get support for the in-chip RTC
1186           that can be found in some of Marvell's SoC devices, such as
1187           the Kirkwood 88F6281 and 88F6192.
1188
1189           This driver can also be built as a module. If so, the module
1190           will be called rtc-mv.
1191
1192 config RTC_DRV_PS3
1193         tristate "PS3 RTC"
1194         depends on PPC_PS3
1195         help
1196           If you say yes here you will get support for the RTC on PS3.
1197
1198           This driver can also be built as a module. If so, the module
1199           will be called rtc-ps3.
1200
1201 config RTC_DRV_COH901331
1202         tristate "ST-Ericsson COH 901 331 RTC"
1203         depends on ARCH_U300
1204         help
1205           If you say Y here you will get access to ST-Ericsson
1206           COH 901 331 RTC clock found in some ST-Ericsson Mobile
1207           Platforms.
1208
1209           This driver can also be built as a module. If so, the module
1210           will be called "rtc-coh901331".
1211
1212
1213 config RTC_DRV_STMP
1214         tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1215         depends on ARCH_MXS
1216         help
1217           If you say yes here you will get support for the onboard
1218           STMP3xxx/i.MX23/i.MX28 RTC.
1219
1220           This driver can also be built as a module. If so, the module
1221           will be called rtc-stmp3xxx.
1222
1223 config RTC_DRV_PCAP
1224         tristate "PCAP RTC"
1225         depends on EZX_PCAP
1226         help
1227           If you say Y here you will get support for the RTC found on
1228           the PCAP2 ASIC used on some Motorola phones.
1229
1230 config RTC_DRV_MC13XXX
1231         depends on MFD_MC13XXX
1232         tristate "Freescale MC13xxx RTC"
1233         help
1234           This enables support for the RTCs found on Freescale's PMICs
1235           MC13783 and MC13892.
1236
1237 config RTC_DRV_MPC5121
1238         tristate "Freescale MPC5121 built-in RTC"
1239         depends on PPC_MPC512x || PPC_MPC52xx
1240         help
1241           If you say yes here you will get support for the
1242           built-in RTC on MPC5121 or on MPC5200.
1243
1244           This driver can also be built as a module. If so, the module
1245           will be called rtc-mpc5121.
1246
1247 config RTC_DRV_JZ4740
1248         tristate "Ingenic JZ4740 SoC"
1249         depends on MACH_JZ4740
1250         help
1251           If you say yes here you get support for the Ingenic JZ4740 SoC RTC
1252           controller.
1253
1254           This driver can also be buillt as a module. If so, the module
1255           will be called rtc-jz4740.
1256
1257 config RTC_DRV_LPC32XX
1258         depends on ARCH_LPC32XX
1259         tristate "NXP LPC32XX RTC"
1260         help
1261           This enables support for the NXP RTC in the LPC32XX
1262
1263           This driver can also be buillt as a module. If so, the module
1264           will be called rtc-lpc32xx.
1265
1266 config RTC_DRV_PM8XXX
1267         tristate "Qualcomm PMIC8XXX RTC"
1268         depends on MFD_PM8XXX
1269         help
1270           If you say yes here you get support for the
1271           Qualcomm PMIC8XXX RTC.
1272
1273           To compile this driver as a module, choose M here: the
1274           module will be called rtc-pm8xxx.
1275
1276 config RTC_DRV_TEGRA
1277         tristate "NVIDIA Tegra Internal RTC driver"
1278         depends on ARCH_TEGRA
1279         help
1280           If you say yes here you get support for the
1281           Tegra 200 series internal RTC module.
1282
1283           This drive can also be built as a module. If so, the module
1284           will be called rtc-tegra.
1285
1286 config RTC_DRV_TILE
1287         tristate "Tilera hypervisor RTC support"
1288         depends on TILE
1289         help
1290           Enable support for the Linux driver side of the Tilera
1291           hypervisor's real-time clock interface.
1292
1293 config RTC_DRV_PUV3
1294         tristate "PKUnity v3 RTC support"
1295         depends on ARCH_PUV3
1296         help
1297           This enables support for the RTC in the PKUnity-v3 SoCs.
1298
1299           This drive can also be built as a module. If so, the module
1300           will be called rtc-puv3.
1301
1302 config RTC_DRV_LOONGSON1
1303         tristate "loongson1 RTC support"
1304         depends on MACH_LOONGSON1
1305         help
1306           This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1307           counter) to be used as a RTC.
1308
1309           This driver can also be built as a module. If so, the module
1310           will be called rtc-ls1x.
1311
1312 config RTC_DRV_MXC
1313         tristate "Freescale MXC Real Time Clock"
1314         depends on ARCH_MXC
1315         help
1316            If you say yes here you get support for the Freescale MXC
1317            RTC module.
1318
1319            This driver can also be built as a module, if so, the module
1320            will be called "rtc-mxc".
1321
1322 config RTC_DRV_SNVS
1323         tristate "Freescale SNVS RTC support"
1324         depends on HAS_IOMEM
1325         depends on OF
1326         help
1327            If you say yes here you get support for the Freescale SNVS
1328            Low Power (LP) RTC module.
1329
1330            This driver can also be built as a module, if so, the module
1331            will be called "rtc-snvs".
1332
1333 config RTC_DRV_SIRFSOC
1334         tristate "SiRFSOC RTC"
1335         depends on ARCH_SIRF
1336         help
1337           Say "yes" here to support the real time clock on SiRF SOC chips.
1338           This driver can also be built as a module called rtc-sirfsoc.
1339
1340 config RTC_DRV_MOXART
1341         tristate "MOXA ART RTC"
1342         help
1343            If you say yes here you get support for the MOXA ART
1344            RTC module.
1345
1346            This driver can also be built as a module. If so, the module
1347            will be called rtc-moxart
1348
1349 config RTC_DRV_XGENE
1350         tristate "APM X-Gene RTC"
1351         help
1352           If you say yes here you get support for the APM X-Gene SoC real time
1353           clock.
1354
1355           This driver can also be built as a module, if so, the module
1356           will be called "rtc-xgene".
1357
1358 comment "HID Sensor RTC drivers"
1359
1360 config RTC_DRV_HID_SENSOR_TIME
1361         tristate "HID Sensor Time"
1362         depends on USB_HID
1363         select IIO
1364         select HID_SENSOR_HUB
1365         select HID_SENSOR_IIO_COMMON
1366         help
1367           Say yes here to build support for the HID Sensors of type Time.
1368           This drivers makes such sensors available as RTCs.
1369
1370           If this driver is compiled as a module, it will be named
1371           rtc-hid-sensor-time.
1372
1373
1374 endif # RTC_CLASS