drivers/rtc/Kconfig

   1 #
   2 # RTC class/drivers configuration
   3 #
   4
   5 config RTC_LIB
   6         tristate
   7
   8 menuconfig RTC_CLASS
   9         tristate "Real Time Clock"
  10         default n
  11         depends on !S390
  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           This driver can also be built as a module. If so, the module
  19           will be called rtc-core.
  20
  21 if RTC_CLASS
  22
  23 config RTC_HCTOSYS
  24         bool "Set system time from RTC on startup and resume"
  25         depends on RTC_CLASS = y
  26         default y
  27         help
  28           If you say yes here, the system time (wall clock) will be set using
  29           the value read from a specified RTC device. This is useful to avoid
  30           unnecessary fsck runs at boot time, and to network better.
  31
  32 config RTC_HCTOSYS_DEVICE
  33         string "RTC used to set the system time"
  34         depends on RTC_HCTOSYS = y
  35         default "rtc0"
  36         help
  37           The RTC device that will be used to (re)initialize the system
  38           clock, usually rtc0. Initialization is done when the system
  39           starts up, and when it resumes from a low power state. This
  40           device should record time in UTC, since the kernel won't do
  41           timezone correction.
  42
  43           The driver for this RTC device must be loaded before late_initcall
  44           functions run, so it must usually be statically linked.
  45
  46           This clock should be battery-backed, so that it reads the correct
  47           time when the system boots from a power-off state. Otherwise, your
  48           system will need an external clock source (like an NTP server).
  49
  50           If the clock you specify here is not battery backed, it may still
  51           be useful to reinitialize system time when resuming from system
  52           sleep states. Do not specify an RTC here unless it stays powered
  53           during all this system's supported sleep states.
  54
  55 config RTC_DEBUG
  56         bool "RTC debug support"
  57         depends on RTC_CLASS = y
  58         help
  59           Say yes here to enable debugging support in the RTC framework
  60           and individual RTC drivers.
  61
  62 comment "RTC interfaces"
  63
  64 config RTC_INTF_SYSFS
  65         boolean "/sys/class/rtc/rtcN (sysfs)"
  66         depends on SYSFS
  67         default RTC_CLASS
  68         help
  69           Say yes here if you want to use your RTCs using sysfs interfaces,
  70           /sys/class/rtc/rtc0 through /sys/.../rtcN.
  71
  72           If unsure, say Y.
  73
  74 config RTC_INTF_PROC
  75         boolean "/proc/driver/rtc (procfs for rtc0)"
  76         depends on PROC_FS
  77         default RTC_CLASS
  78         help
  79           Say yes here if you want to use your first RTC through the proc
  80           interface, /proc/driver/rtc. Other RTCs will not be available
  81           through that API.
  82
  83           If unsure, say Y.
  84
  85 config RTC_INTF_DEV
  86         boolean "/dev/rtcN (character devices)"
  87         default RTC_CLASS
  88         help
  89           Say yes here if you want to use your RTCs using the /dev
  90           interfaces, which "udev" sets up as /dev/rtc0 through
  91           /dev/rtcN.
  92
  93           You may want to set up a symbolic link so one of these
  94           can be accessed as /dev/rtc, which is a name
  95           expected by "hwclock" and some other programs. Recent
  96           versions of "udev" are known to set up the symlink for you.
  97
  98           If unsure, say Y.
  99
 100 config RTC_INTF_DEV_UIE_EMUL
 101         bool "RTC UIE emulation on dev interface"
 102         depends on RTC_INTF_DEV
 103         help
 104           Provides an emulation for RTC_UIE if the underlying rtc chip
 105           driver does not expose RTC_UIE ioctls. Those requests generate
 106           once-per-second update interrupts, used for synchronization.
 107
 108           The emulation code will read the time from the hardware
 109           clock several times per second, please enable this option
 110           only if you know that you really need it.
 111
 112 config RTC_DRV_TEST
 113         tristate "Test driver/device"
 114         help
 115           If you say yes here you get support for the
 116           RTC test driver. It's a software RTC which can be
 117           used to test the RTC subsystem APIs. It gets
 118           the time from the system clock.
 119           You want this driver only if you are doing development
 120           on the RTC subsystem. Please read the source code
 121           for further details.
 122
 123           This driver can also be built as a module. If so, the module
 124           will be called rtc-test.
 125
 126 comment "I2C RTC drivers"
 127         depends on I2C
 128
 129 if I2C
 130
 131 config RTC_DRV_DS1307
 132         tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00"
 133         help
 134           If you say yes here you get support for various compatible RTC
 135           chips (often with battery backup) connected with I2C. This driver
 136           should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
 137           and probably other chips. In some cases the RTC must already
 138           have been initialized (by manufacturing or a bootloader).
 139
 140           The first seven registers on these chips hold an RTC, and other
 141           registers may add features such as NVRAM, a trickle charger for
 142           the RTC/NVRAM backup power, and alarms. NVRAM is visible in
 143           sysfs, but other chip features may not be available.
 144
 145           This driver can also be built as a module. If so, the module
 146           will be called rtc-ds1307.
 147
 148 config RTC_DRV_DS1374
 149         tristate "Dallas/Maxim DS1374"
 150         depends on RTC_CLASS && I2C
 151         help
 152           If you say yes here you get support for Dallas Semiconductor
 153           DS1374 real-time clock chips. If an interrupt is associated
 154           with the device, the alarm functionality is supported.
 155
 156           This driver can also be built as a module. If so, the module
 157           will be called rtc-ds1374.
 158
 159 config RTC_DRV_DS1672
 160         tristate "Dallas/Maxim DS1672"
 161         help
 162           If you say yes here you get support for the
 163           Dallas/Maxim DS1672 timekeeping chip.
 164
 165           This driver can also be built as a module. If so, the module
 166           will be called rtc-ds1672.
 167
 168 config RTC_DRV_MAX6900
 169         tristate "Maxim MAX6900"
 170         help
 171           If you say yes here you will get support for the
 172           Maxim MAX6900 I2C RTC chip.
 173
 174           This driver can also be built as a module. If so, the module
 175           will be called rtc-max6900.
 176
 177 config RTC_DRV_RS5C372
 178         tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
 179         help
 180           If you say yes here you get support for the
 181           Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
 182
 183           This driver can also be built as a module. If so, the module
 184           will be called rtc-rs5c372.
 185
 186 config RTC_DRV_ISL1208
 187         tristate "Intersil ISL1208"
 188         help
 189           If you say yes here you get support for the
 190           Intersil ISL1208 RTC chip.
 191
 192           This driver can also be built as a module. If so, the module
 193           will be called rtc-isl1208.
 194
 195 config RTC_DRV_X1205
 196         tristate "Xicor/Intersil X1205"
 197         help
 198           If you say yes here you get support for the
 199           Xicor/Intersil X1205 RTC chip.
 200
 201           This driver can also be built as a module. If so, the module
 202           will be called rtc-x1205.
 203
 204 config RTC_DRV_PCF8563
 205         tristate "Philips PCF8563/Epson RTC8564"
 206         help
 207           If you say yes here you get support for the
 208           Philips PCF8563 RTC chip. The Epson RTC8564
 209           should work as well.
 210
 211           This driver can also be built as a module. If so, the module
 212           will be called rtc-pcf8563.
 213
 214 config RTC_DRV_PCF8583
 215         tristate "Philips PCF8583"
 216         help
 217           If you say yes here you get support for the Philips PCF8583
 218           RTC chip found on Acorn RiscPCs. This driver supports the
 219           platform specific method of retrieving the current year from
 220           the RTC's SRAM. It will work on other platforms with the same
 221           chip, but the year will probably have to be tweaked.
 222
 223           This driver can also be built as a module. If so, the module
 224           will be called rtc-pcf8583.
 225
 226 config RTC_DRV_M41T80
 227         tristate "ST M41T65/M41T80/81/82/83/84/85/87"
 228         help
 229           If you say Y here you will get support for the ST M41T60
 230           and M41T80 RTC chips series. Currently, the following chips are
 231           supported: M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
 232           M41ST85, and M41ST87.
 233
 234           This driver can also be built as a module. If so, the module
 235           will be called rtc-m41t80.
 236
 237 config RTC_DRV_M41T80_WDT
 238         bool "ST M41T65/M41T80 series RTC watchdog timer"
 239         depends on RTC_DRV_M41T80
 240         help
 241           If you say Y here you will get support for the
 242           watchdog timer in the ST M41T60 and M41T80 RTC chips series.
 243
 244 config RTC_DRV_DM355EVM
 245         tristate "TI DaVinci DM355 EVM RTC"
 246         depends on MFD_DM355EVM_MSP
 247         help
 248           Supports the RTC firmware in the MSP430 on the DM355 EVM.
 249
 250 config RTC_DRV_TWL92330
 251         boolean "TI TWL92330/Menelaus"
 252         depends on MENELAUS
 253         help
 254           If you say yes here you get support for the RTC on the
 255           TWL92330 "Menelaus" power management chip, used with OMAP2
 256           platforms. The support is integrated with the rest of
 257           the Menelaus driver; it's not separate module.
 258
 259 config RTC_DRV_TWL4030
 260         tristate "TI TWL4030/TWL5030/TPS659x0"
 261         depends on RTC_CLASS && TWL4030_CORE
 262         help
 263           If you say yes here you get support for the RTC on the
 264           TWL4030 family chips, used mostly with OMAP3 platforms.
 265
 266           This driver can also be built as a module. If so, the module
 267           will be called rtc-twl4030.
 268
 269 config RTC_DRV_S35390A
 270         tristate "Seiko Instruments S-35390A"
 271         select BITREVERSE
 272         help
 273           If you say yes here you will get support for the Seiko
 274           Instruments S-35390A.
 275
 276           This driver can also be built as a module. If so the module
 277           will be called rtc-s35390a.
 278
 279 config RTC_DRV_FM3130
 280         tristate "Ramtron FM3130"
 281         help
 282           If you say Y here you will get support for the
 283           Ramtron FM3130 RTC chips.
 284           Ramtron FM3130 is a chip with two separate devices inside,
 285           RTC clock and FRAM. This driver provides only RTC functionality.
 286
 287           This driver can also be built as a module. If so the module
 288           will be called rtc-fm3130.
 289
 290 config RTC_DRV_RX8581
 291         tristate "Epson RX-8581"
 292         help
 293           If you say yes here you will get support for the Epson RX-8581.
 294
 295           This driver can also be built as a module. If so the module
 296           will be called rtc-rx8581.
 297
 298 endif # I2C
 299
 300 comment "SPI RTC drivers"
 301
 302 if SPI_MASTER
 303
 304 config RTC_DRV_M41T94
 305         tristate "ST M41T94"
 306         help
 307           If you say yes here you will get support for the
 308           ST M41T94 SPI RTC chip.
 309
 310           This driver can also be built as a module. If so, the module
 311           will be called rtc-m41t94.
 312
 313 config RTC_DRV_DS1305
 314         tristate "Dallas/Maxim DS1305/DS1306"
 315         help
 316           Select this driver to get support for the Dallas/Maxim DS1305
 317           and DS1306 real time clock chips. These support a trickle
 318           charger, alarms, and NVRAM in addition to the clock.
 319
 320           This driver can also be built as a module. If so, the module
 321           will be called rtc-ds1305.
 322
 323 config RTC_DRV_DS1390
 324         tristate "Dallas/Maxim DS1390/93/94"
 325         help
 326           If you say yes here you get support for the
 327           Dallas/Maxim DS1390/93/94 chips.
 328
 329           This driver only supports the RTC feature, and not other chip
 330           features such as alarms and trickle charging.
 331
 332           This driver can also be built as a module. If so, the module
 333           will be called rtc-ds1390.
 334
 335 config RTC_DRV_MAX6902
 336         tristate "Maxim MAX6902"
 337         help
 338           If you say yes here you will get support for the
 339           Maxim MAX6902 SPI RTC chip.
 340
 341           This driver can also be built as a module. If so, the module
 342           will be called rtc-max6902.
 343
 344 config RTC_DRV_R9701
 345         tristate "Epson RTC-9701JE"
 346         help
 347           If you say yes here you will get support for the
 348           Epson RTC-9701JE SPI RTC chip.
 349
 350           This driver can also be built as a module. If so, the module
 351           will be called rtc-r9701.
 352
 353 config RTC_DRV_RS5C348
 354         tristate "Ricoh RS5C348A/B"
 355         help
 356           If you say yes here you get support for the
 357           Ricoh RS5C348A and RS5C348B RTC chips.
 358
 359           This driver can also be built as a module. If so, the module
 360           will be called rtc-rs5c348.
 361
 362 config RTC_DRV_DS3234
 363         tristate "Maxim/Dallas DS3234"
 364         help
 365           If you say yes here you get support for the
 366           Maxim/Dallas DS3234 SPI RTC chip.
 367
 368           This driver can also be built as a module. If so, the module
 369           will be called rtc-ds3234.
 370
 371 endif # SPI_MASTER
 372
 373 comment "Platform RTC drivers"
 374
 375 # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
 376 # requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
 377 # global rtc_lock ... it's not yet just another platform_device.
 378
 379 config RTC_DRV_CMOS
 380         tristate "PC-style 'CMOS'"
 381         depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS || SPARC64
 382         default y if X86
 383         help
 384           Say "yes" here to get direct support for the real time clock
 385           found in every PC or ACPI-based system, and some other boards.
 386           Specifically the original MC146818, compatibles like those in
 387           PC south bridges, the DS12887 or M48T86, some multifunction
 388           or LPC bus chips, and so on.
 389
 390           Your system will need to define the platform device used by
 391           this driver, otherwise it won't be accessible. This means
 392           you can safely enable this driver if you don't know whether
 393           or not your board has this kind of hardware.
 394
 395           This driver can also be built as a module. If so, the module
 396           will be called rtc-cmos.
 397
 398 config RTC_DRV_DS1216
 399         tristate "Dallas DS1216"
 400         depends on SNI_RM
 401         help
 402           If you say yes here you get support for the Dallas DS1216 RTC chips.
 403
 404 config RTC_DRV_DS1286
 405         tristate "Dallas DS1286"
 406         help
 407           If you say yes here you get support for the Dallas DS1286 RTC chips.
 408
 409 config RTC_DRV_DS1302
 410         tristate "Dallas DS1302"
 411         depends on SH_SECUREEDGE5410
 412         help
 413           If you say yes here you get support for the Dallas DS1302 RTC chips.
 414
 415 config RTC_DRV_DS1511
 416         tristate "Dallas DS1511"
 417         depends on RTC_CLASS
 418         help
 419           If you say yes here you get support for the
 420           Dallas DS1511 timekeeping/watchdog chip.
 421
 422           This driver can also be built as a module. If so, the module
 423           will be called rtc-ds1511.
 424
 425 config RTC_DRV_DS1553
 426         tristate "Maxim/Dallas DS1553"
 427         help
 428           If you say yes here you get support for the
 429           Maxim/Dallas DS1553 timekeeping chip.
 430
 431           This driver can also be built as a module. If so, the module
 432           will be called rtc-ds1553.
 433
 434 config RTC_DRV_DS1742
 435         tristate "Maxim/Dallas DS1742/1743"
 436         help
 437           If you say yes here you get support for the
 438           Maxim/Dallas DS1742/1743 timekeeping chip.
 439
 440           This driver can also be built as a module. If so, the module
 441           will be called rtc-ds1742.
 442
 443 config RTC_DRV_EFI
 444         tristate "EFI RTC"
 445         depends on IA64
 446         help
 447           If you say yes here you will get support for the EFI
 448           Real Time Clock.
 449
 450           This driver can also be built as a module. If so, the module
 451           will be called rtc-efi.
 452
 453 config RTC_DRV_STK17TA8
 454         tristate "Simtek STK17TA8"
 455         depends on RTC_CLASS
 456         help
 457           If you say yes here you get support for the
 458           Simtek STK17TA8 timekeeping chip.
 459
 460           This driver can also be built as a module. If so, the module
 461           will be called rtc-stk17ta8.
 462
 463 config RTC_DRV_M48T86
 464         tristate "ST M48T86/Dallas DS12887"
 465         help
 466           If you say Y here you will get support for the
 467           ST M48T86 and Dallas DS12887 RTC chips.
 468
 469           This driver can also be built as a module. If so, the module
 470           will be called rtc-m48t86.
 471
 472 config RTC_DRV_M48T35
 473         tristate "ST M48T35"
 474         help
 475           If you say Y here you will get support for the
 476           ST M48T35 RTC chip.
 477
 478           This driver can also be built as a module, if so, the module
 479           will be called "rtc-m48t35".
 480
 481 config RTC_DRV_M48T59
 482         tristate "ST M48T59/M48T08/M48T02"
 483         help
 484           If you say Y here you will get support for the
 485           ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
 486
 487           These chips are usually found in Sun SPARC and UltraSPARC
 488           workstations.
 489
 490           This driver can also be built as a module, if so, the module
 491           will be called "rtc-m48t59".
 492
 493 config RTC_DRV_BQ4802
 494         tristate "TI BQ4802"
 495         help
 496           If you say Y here you will get support for the TI
 497           BQ4802 RTC chip.
 498
 499           This driver can also be built as a module. If so, the module
 500           will be called rtc-bq4802.
 501
 502 config RTC_DRV_V3020
 503         tristate "EM Microelectronic V3020"
 504         help
 505           If you say yes here you will get support for the
 506           EM Microelectronic v3020 RTC chip.
 507
 508           This driver can also be built as a module. If so, the module
 509           will be called rtc-v3020.
 510
 511 config RTC_DRV_WM8350
 512         tristate "Wolfson Microelectronics WM8350 RTC"
 513         depends on MFD_WM8350
 514         help
 515           If you say yes here you will get support for the RTC subsystem
 516           of the Wolfson Microelectronics WM8350.
 517
 518           This driver can also be built as a module. If so, the module
 519           will be called "rtc-wm8350".
 520
 521 config RTC_DRV_PCF50633
 522         depends on MFD_PCF50633
 523         tristate "NXP PCF50633 RTC"
 524         help
 525           If you say yes here you get support for the RTC subsystem of the
 526           NXP PCF50633 used in embedded systems.
 527
 528 comment "on-CPU RTC drivers"
 529
 530 config RTC_DRV_OMAP
 531         tristate "TI OMAP1"
 532         depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730
 533         help
 534           Say "yes" here to support the real time clock on TI OMAP1 chips.
 535           This driver can also be built as a module called rtc-omap.
 536
 537 config RTC_DRV_S3C
 538         tristate "Samsung S3C series SoC RTC"
 539         depends on ARCH_S3C2410
 540         help
 541           RTC (Realtime Clock) driver for the clock inbuilt into the
 542           Samsung S3C24XX series of SoCs. This can provide periodic
 543           interrupt rates from 1Hz to 64Hz for user programs, and
 544           wakeup from Alarm.
 545
 546           The driver currently supports the common features on all the
 547           S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
 548           and S3C2442.
 549
 550           This driver can also be build as a module. If so, the module
 551           will be called rtc-s3c.
 552
 553 config RTC_DRV_EP93XX
 554         tristate "Cirrus Logic EP93XX"
 555         depends on ARCH_EP93XX
 556         help
 557           If you say yes here you get support for the
 558           RTC embedded in the Cirrus Logic EP93XX processors.
 559
 560           This driver can also be built as a module. If so, the module
 561           will be called rtc-ep93xx.
 562
 563 config RTC_DRV_SA1100
 564         tristate "SA11x0/PXA2xx"
 565         depends on ARCH_SA1100 || ARCH_PXA
 566         help
 567           If you say Y here you will get access to the real time clock
 568           built into your SA11x0 or PXA2xx CPU.
 569
 570           To compile this driver as a module, choose M here: the
 571           module will be called rtc-sa1100.
 572
 573 config RTC_DRV_SH
 574         tristate "SuperH On-Chip RTC"
 575         depends on RTC_CLASS && SUPERH
 576         help
 577           Say Y here to enable support for the on-chip RTC found in
 578           most SuperH processors.
 579
 580           To compile this driver as a module, choose M here: the
 581           module will be called rtc-sh.
 582
 583 config RTC_DRV_VR41XX
 584         tristate "NEC VR41XX"
 585         depends on CPU_VR41XX
 586         help
 587           If you say Y here you will get access to the real time clock
 588           built into your NEC VR41XX CPU.
 589
 590           To compile this driver as a module, choose M here: the
 591           module will be called rtc-vr41xx.
 592
 593 config RTC_DRV_PL030
 594         tristate "ARM AMBA PL030 RTC"
 595         depends on ARM_AMBA
 596         help
 597           If you say Y here you will get access to ARM AMBA
 598           PrimeCell PL030 RTC found on certain ARM SOCs.
 599
 600           To compile this driver as a module, choose M here: the
 601           module will be called rtc-pl030.
 602
 603 config RTC_DRV_PL031
 604         tristate "ARM AMBA PL031 RTC"
 605         depends on ARM_AMBA
 606         help
 607           If you say Y here you will get access to ARM AMBA
 608           PrimeCell PL031 RTC found on certain ARM SOCs.
 609
 610           To compile this driver as a module, choose M here: the
 611           module will be called rtc-pl031.
 612
 613 config RTC_DRV_AT32AP700X
 614         tristate "AT32AP700X series RTC"
 615         depends on PLATFORM_AT32AP
 616         help
 617           Driver for the internal RTC (Realtime Clock) on Atmel AVR32
 618           AT32AP700x family processors.
 619
 620 config RTC_DRV_AT91RM9200
 621         tristate "AT91RM9200 or AT91SAM9RL"
 622         depends on ARCH_AT91RM9200 || ARCH_AT91SAM9RL
 623         help
 624           Driver for the internal RTC (Realtime Clock) module found on
 625           Atmel AT91RM9200's and AT91SAM9RL chips. On SAM9RL chips
 626           this is powered by the backup power supply.
 627
 628 config RTC_DRV_AT91SAM9
 629         tristate "AT91SAM9x/AT91CAP9"
 630         depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
 631         help
 632           RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
 633           (Real Time Timer). These timers are powered by the backup power
 634           supply (such as a small coin cell battery), but do not need to
 635           be used as RTCs.
 636
 637           (On AT91SAM9rl chips you probably want to use the dedicated RTC
 638           module and leave the RTT available for other uses.)
 639
 640 config RTC_DRV_AT91SAM9_RTT
 641         int
 642         range 0 1
 643         default 0
 644         prompt "RTT module Number" if ARCH_AT91SAM9263
 645         depends on RTC_DRV_AT91SAM9
 646         help
 647           More than one RTT module is available. You can choose which
 648           one will be used as an RTC. The default of zero is normally
 649           OK to use, though some systems use that for non-RTC purposes.
 650
 651 config RTC_DRV_AT91SAM9_GPBR
 652         int
 653         range 0 3 if !ARCH_AT91SAM9263
 654         range 0 15 if ARCH_AT91SAM9263
 655         default 0
 656         prompt "Backup Register Number"
 657         depends on RTC_DRV_AT91SAM9
 658         help
 659           The RTC driver needs to use one of the General Purpose Backup
 660           Registers (GPBRs) as well as the RTT. You can choose which one
 661           will be used. The default of zero is normally OK to use, but
 662           on some systems other software needs to use that register.
 663
 664 config RTC_DRV_AU1XXX
 665         tristate "Au1xxx Counter0 RTC support"
 666         depends on SOC_AU1X00
 667         help
 668           This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
 669           counter) to be used as a RTC.
 670
 671           This driver can also be built as a module. If so, the module
 672           will be called rtc-au1xxx.
 673
 674 config RTC_DRV_BFIN
 675         tristate "Blackfin On-Chip RTC"
 676         depends on BLACKFIN && !BF561
 677         help
 678           If you say yes here you will get support for the
 679           Blackfin On-Chip Real Time Clock.
 680
 681           This driver can also be built as a module. If so, the module
 682           will be called rtc-bfin.
 683
 684 config RTC_DRV_RS5C313
 685         tristate "Ricoh RS5C313"
 686         depends on SH_LANDISK
 687         help
 688           If you say yes here you get support for the Ricoh RS5C313 RTC chips.
 689
 690 config RTC_DRV_PARISC
 691         tristate "PA-RISC firmware RTC support"
 692         depends on PARISC
 693         help
 694           Say Y or M here to enable RTC support on PA-RISC systems using
 695           firmware calls. If you do not know what you are doing, you should
 696           just say Y.
 697
 698 config RTC_DRV_PPC
 699        tristate "PowerPC machine dependent RTC support"
 700        depends on PPC
 701        help
 702          The PowerPC kernel has machine-specific functions for accessing
 703          the RTC. This exposes that functionality through the generic RTC
 704          class.
 705
 706 config RTC_DRV_PXA
 707        tristate "PXA27x/PXA3xx"
 708        depends on ARCH_PXA
 709        help
 710          If you say Y here you will get access to the real time clock
 711          built into your PXA27x or PXA3xx CPU.
 712
 713          This RTC driver uses PXA RTC registers available since pxa27x
 714          series (RDxR, RYxR) instead of legacy RCNR, RTAR.
 715
 716
 717 config RTC_DRV_SUN4V
 718         bool "SUN4V Hypervisor RTC"
 719         depends on SPARC64
 720         help
 721           If you say Y here you will get support for the Hypervisor
 722           based RTC on SUN4V systems.
 723
 724 config RTC_DRV_STARFIRE
 725         bool "Starfire RTC"
 726         depends on SPARC64
 727         help
 728           If you say Y here you will get support for the RTC found on
 729           Starfire systems.
 730
 731 config RTC_DRV_TX4939
 732         tristate "TX4939 SoC"
 733         depends on SOC_TX4939
 734         help
 735           Driver for the internal RTC (Realtime Clock) module found on
 736           Toshiba TX4939 SoC.
 737
 738 config RTC_DRV_MV
 739         tristate "Marvell SoC RTC"
 740         depends on ARCH_KIRKWOOD
 741         help
 742           If you say yes here you will get support for the in-chip RTC
 743           that can be found in some of Marvell's SoC devices, such as
 744           the Kirkwood 88F6281 and 88F6192.
 745
 746           This driver can also be built as a module. If so, the module
 747           will be called rtc-mv.
 748
 749 endif # RTC_CLASS