2 # RTC class/drivers configuration
11 depends on !S390 && !UML
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.
21 bool "Set system time from RTC on startup and resume"
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.
28 config RTC_HCTOSYS_DEVICE
29 string "RTC used to set the system time"
30 depends on RTC_HCTOSYS = y
33 The RTC device that will be used to (re)initialize the system
34 clock, usually rtc0. Initialization is done when the system
35 starts up, and when it resumes from a low power state. This
36 device should record time in UTC, since the kernel won't do
39 The driver for this RTC device must be loaded before late_initcall
40 functions run, so it must usually be statically linked.
42 This clock should be battery-backed, so that it reads the correct
43 time when the system boots from a power-off state. Otherwise, your
44 system will need an external clock source (like an NTP server).
46 If the clock you specify here is not battery backed, it may still
47 be useful to reinitialize system time when resuming from system
48 sleep states. Do not specify an RTC here unless it stays powered
49 during all this system's supported sleep states.
52 bool "RTC debug support"
54 Say yes here to enable debugging support in the RTC framework
55 and individual RTC drivers.
57 comment "RTC interfaces"
60 boolean "/sys/class/rtc/rtcN (sysfs)"
64 Say yes here if you want to use your RTCs using sysfs interfaces,
65 /sys/class/rtc/rtc0 through /sys/.../rtcN.
70 boolean "/proc/driver/rtc (procfs for rtcN)"
74 Say yes here if you want to use your system clock RTC through
75 the proc interface, /proc/driver/rtc.
76 Other RTCs will not be available through that API.
77 If there is no RTC for the system clock, then the first RTC(rtc0)
83 boolean "/dev/rtcN (character devices)"
86 Say yes here if you want to use your RTCs using the /dev
87 interfaces, which "udev" sets up as /dev/rtc0 through
90 You may want to set up a symbolic link so one of these
91 can be accessed as /dev/rtc, which is a name
92 expected by "hwclock" and some other programs. Recent
93 versions of "udev" are known to set up the symlink for you.
97 config RTC_INTF_DEV_UIE_EMUL
98 bool "RTC UIE emulation on dev interface"
99 depends on RTC_INTF_DEV
101 Provides an emulation for RTC_UIE if the underlying rtc chip
102 driver does not expose RTC_UIE ioctls. Those requests generate
103 once-per-second update interrupts, used for synchronization.
105 The emulation code will read the time from the hardware
106 clock several times per second, please enable this option
107 only if you know that you really need it.
110 tristate "Test driver/device"
112 If you say yes here you get support for the
113 RTC test driver. It's a software RTC which can be
114 used to test the RTC subsystem APIs. It gets
115 the time from the system clock.
116 You want this driver only if you are doing development
117 on the RTC subsystem. Please read the source code
120 This driver can also be built as a module. If so, the module
121 will be called rtc-test.
123 comment "I2C RTC drivers"
128 config RTC_DRV_88PM860X
129 tristate "Marvell 88PM860x"
130 depends on I2C && MFD_88PM860X
132 If you say yes here you get support for RTC function in Marvell
135 This driver can also be built as a module. If so, the module
136 will be called rtc-88pm860x.
138 config RTC_DRV_88PM80X
139 tristate "Marvell 88PM80x"
140 depends on I2C && MFD_88PM800
142 If you say yes here you get support for RTC function in Marvell
145 This driver can also be built as a module. If so, the module
146 will be called rtc-88pm80x.
148 config RTC_DRV_DS1307
149 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
151 If you say yes here you get support for various compatible RTC
152 chips (often with battery backup) connected with I2C. This driver
153 should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
154 EPSON RX-8025 and probably other chips. In some cases the RTC
155 must already have been initialized (by manufacturing or a
158 The first seven registers on these chips hold an RTC, and other
159 registers may add features such as NVRAM, a trickle charger for
160 the RTC/NVRAM backup power, and alarms. NVRAM is visible in
161 sysfs, but other chip features may not be available.
163 This driver can also be built as a module. If so, the module
164 will be called rtc-ds1307.
166 config RTC_DRV_DS1374
167 tristate "Dallas/Maxim DS1374"
170 If you say yes here you get support for Dallas Semiconductor
171 DS1374 real-time clock chips. If an interrupt is associated
172 with the device, the alarm functionality is supported.
174 This driver can also be built as a module. If so, the module
175 will be called rtc-ds1374.
177 config RTC_DRV_DS1672
178 tristate "Dallas/Maxim DS1672"
180 If you say yes here you get support for the
181 Dallas/Maxim DS1672 timekeeping chip.
183 This driver can also be built as a module. If so, the module
184 will be called rtc-ds1672.
186 config RTC_DRV_DS3232
187 tristate "Dallas/Maxim DS3232"
190 If you say yes here you get support for Dallas Semiconductor
191 DS3232 real-time clock chips. If an interrupt is associated
192 with the device, the alarm functionality is supported.
194 This driver can also be built as a module. If so, the module
195 will be called rtc-ds3232.
197 config RTC_DRV_MAX6900
198 tristate "Maxim MAX6900"
200 If you say yes here you will get support for the
201 Maxim MAX6900 I2C RTC chip.
203 This driver can also be built as a module. If so, the module
204 will be called rtc-max6900.
206 config RTC_DRV_MAX8907
207 tristate "Maxim MAX8907"
208 depends on MFD_MAX8907
210 If you say yes here you will get support for the
211 RTC of Maxim MAX8907 PMIC.
213 This driver can also be built as a module. If so, the module
214 will be called rtc-max8907.
216 config RTC_DRV_MAX8925
217 tristate "Maxim MAX8925"
218 depends on MFD_MAX8925
220 If you say yes here you will get support for the
221 RTC of Maxim MAX8925 PMIC.
223 This driver can also be built as a module. If so, the module
224 will be called rtc-max8925.
226 config RTC_DRV_MAX8998
227 tristate "Maxim MAX8998"
228 depends on MFD_MAX8998
230 If you say yes here you will get support for the
231 RTC of Maxim MAX8998 PMIC.
233 This driver can also be built as a module. If so, the module
234 will be called rtc-max8998.
236 config RTC_DRV_RS5C372
237 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
239 If you say yes here you get support for the
240 Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
242 This driver can also be built as a module. If so, the module
243 will be called rtc-rs5c372.
245 config RTC_DRV_ISL1208
246 tristate "Intersil ISL1208"
248 If you say yes here you get support for the
249 Intersil ISL1208 RTC chip.
251 This driver can also be built as a module. If so, the module
252 will be called rtc-isl1208.
254 config RTC_DRV_ISL12022
255 tristate "Intersil ISL12022"
257 If you say yes here you get support for the
258 Intersil ISL12022 RTC chip.
260 This driver can also be built as a module. If so, the module
261 will be called rtc-isl12022.
264 tristate "Xicor/Intersil X1205"
266 If you say yes here you get support for the
267 Xicor/Intersil X1205 RTC chip.
269 This driver can also be built as a module. If so, the module
270 will be called rtc-x1205.
272 config RTC_DRV_PCF8563
273 tristate "Philips PCF8563/Epson RTC8564"
275 If you say yes here you get support for the
276 Philips PCF8563 RTC chip. The Epson RTC8564
279 This driver can also be built as a module. If so, the module
280 will be called rtc-pcf8563.
282 config RTC_DRV_PCF8583
283 tristate "Philips PCF8583"
285 If you say yes here you get support for the Philips PCF8583
286 RTC chip found on Acorn RiscPCs. This driver supports the
287 platform specific method of retrieving the current year from
288 the RTC's SRAM. It will work on other platforms with the same
289 chip, but the year will probably have to be tweaked.
291 This driver can also be built as a module. If so, the module
292 will be called rtc-pcf8583.
294 config RTC_DRV_M41T80
295 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87"
297 If you say Y here you will get support for the ST M41T60
298 and M41T80 RTC chips series. Currently, the following chips are
299 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
300 M41ST85, and M41ST87.
302 This driver can also be built as a module. If so, the module
303 will be called rtc-m41t80.
305 config RTC_DRV_M41T80_WDT
306 bool "ST M41T65/M41T80 series RTC watchdog timer"
307 depends on RTC_DRV_M41T80
309 If you say Y here you will get support for the
310 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
313 tristate "TI BQ32000"
315 If you say Y here you will get support for the TI
316 BQ32000 I2C RTC chip.
318 This driver can also be built as a module. If so, the module
319 will be called rtc-bq32k.
321 config RTC_DRV_DM355EVM
322 tristate "TI DaVinci DM355 EVM RTC"
323 depends on MFD_DM355EVM_MSP
325 Supports the RTC firmware in the MSP430 on the DM355 EVM.
327 config RTC_DRV_TWL92330
328 boolean "TI TWL92330/Menelaus"
331 If you say yes here you get support for the RTC on the
332 TWL92330 "Menelaus" power management chip, used with OMAP2
333 platforms. The support is integrated with the rest of
334 the Menelaus driver; it's not separate module.
336 config RTC_DRV_TWL4030
337 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
338 depends on TWL4030_CORE
340 If you say yes here you get support for the RTC on the
341 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
343 This driver can also be built as a module. If so, the module
344 will be called rtc-twl.
346 config RTC_DRV_TPS65910
347 tristate "TI TPS65910 RTC driver"
348 depends on RTC_CLASS && MFD_TPS65910
350 If you say yes here you get support for the RTC on the
353 This driver can also be built as a module. If so, the module
354 will be called rtc-tps65910.
356 config RTC_DRV_RC5T583
357 tristate "RICOH 5T583 RTC driver"
358 depends on MFD_RC5T583
360 If you say yes here you get support for the RTC on the
363 This driver can also be built as a module. If so, the module
364 will be called rtc-rc5t583.
366 config RTC_DRV_S35390A
367 tristate "Seiko Instruments S-35390A"
370 If you say yes here you will get support for the Seiko
371 Instruments S-35390A.
373 This driver can also be built as a module. If so the module
374 will be called rtc-s35390a.
376 config RTC_DRV_FM3130
377 tristate "Ramtron FM3130"
379 If you say Y here you will get support for the
380 Ramtron FM3130 RTC chips.
381 Ramtron FM3130 is a chip with two separate devices inside,
382 RTC clock and FRAM. This driver provides only RTC functionality.
384 This driver can also be built as a module. If so the module
385 will be called rtc-fm3130.
387 config RTC_DRV_RX8581
388 tristate "Epson RX-8581"
390 If you say yes here you will get support for the Epson RX-8581.
392 This driver can also be built as a module. If so the module
393 will be called rtc-rx8581.
395 config RTC_DRV_RX8025
396 tristate "Epson RX-8025SA/NB"
398 If you say yes here you get support for the Epson
399 RX-8025SA/NB RTC chips.
401 This driver can also be built as a module. If so, the module
402 will be called rtc-rx8025.
404 config RTC_DRV_EM3027
405 tristate "EM Microelectronic EM3027"
407 If you say yes here you get support for the EM
408 Microelectronic EM3027 RTC chips.
410 This driver can also be built as a module. If so, the module
411 will be called rtc-em3027.
413 config RTC_DRV_RV3029C2
414 tristate "Micro Crystal RTC"
416 If you say yes here you get support for the Micro Crystal
419 This driver can also be built as a module. If so, the module
420 will be called rtc-rv3029c2.
424 comment "SPI RTC drivers"
428 config RTC_DRV_M41T93
431 If you say yes here you will get support for the
432 ST M41T93 SPI RTC chip.
434 This driver can also be built as a module. If so, the module
435 will be called rtc-m41t93.
437 config RTC_DRV_M41T94
440 If you say yes here you will get support for the
441 ST M41T94 SPI RTC chip.
443 This driver can also be built as a module. If so, the module
444 will be called rtc-m41t94.
446 config RTC_DRV_DS1305
447 tristate "Dallas/Maxim DS1305/DS1306"
449 Select this driver to get support for the Dallas/Maxim DS1305
450 and DS1306 real time clock chips. These support a trickle
451 charger, alarms, and NVRAM in addition to the clock.
453 This driver can also be built as a module. If so, the module
454 will be called rtc-ds1305.
456 config RTC_DRV_DS1390
457 tristate "Dallas/Maxim DS1390/93/94"
459 If you say yes here you get support for the
460 Dallas/Maxim DS1390/93/94 chips.
462 This driver only supports the RTC feature, and not other chip
463 features such as alarms and trickle charging.
465 This driver can also be built as a module. If so, the module
466 will be called rtc-ds1390.
468 config RTC_DRV_MAX6902
469 tristate "Maxim MAX6902"
471 If you say yes here you will get support for the
472 Maxim MAX6902 SPI RTC chip.
474 This driver can also be built as a module. If so, the module
475 will be called rtc-max6902.
478 tristate "Epson RTC-9701JE"
480 If you say yes here you will get support for the
481 Epson RTC-9701JE SPI RTC chip.
483 This driver can also be built as a module. If so, the module
484 will be called rtc-r9701.
486 config RTC_DRV_RS5C348
487 tristate "Ricoh RS5C348A/B"
489 If you say yes here you get support for the
490 Ricoh RS5C348A and RS5C348B RTC chips.
492 This driver can also be built as a module. If so, the module
493 will be called rtc-rs5c348.
495 config RTC_DRV_DS3234
496 tristate "Maxim/Dallas DS3234"
498 If you say yes here you get support for the
499 Maxim/Dallas DS3234 SPI RTC chip.
501 This driver can also be built as a module. If so, the module
502 will be called rtc-ds3234.
504 config RTC_DRV_PCF2123
505 tristate "NXP PCF2123"
507 If you say yes here you get support for the NXP PCF2123
510 This driver can also be built as a module. If so, the module
511 will be called rtc-pcf2123.
515 comment "Platform RTC drivers"
517 # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
518 # requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
519 # global rtc_lock ... it's not yet just another platform_device.
522 tristate "PC-style 'CMOS'"
523 depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS || SPARC64
526 Say "yes" here to get direct support for the real time clock
527 found in every PC or ACPI-based system, and some other boards.
528 Specifically the original MC146818, compatibles like those in
529 PC south bridges, the DS12887 or M48T86, some multifunction
530 or LPC bus chips, and so on.
532 Your system will need to define the platform device used by
533 this driver, otherwise it won't be accessible. This means
534 you can safely enable this driver if you don't know whether
535 or not your board has this kind of hardware.
537 This driver can also be built as a module. If so, the module
538 will be called rtc-cmos.
541 tristate "Virtual RTC for Intel MID platforms"
542 depends on X86_INTEL_MID
543 default y if X86_INTEL_MID
546 Say "yes" here to get direct support for the real time clock
547 found on Moorestown platforms. The VRTC is a emulated RTC that
548 derives its clock source from a real RTC in the PMIC. The MC146818
549 style programming interface is mostly conserved, but any
550 updates are done via IPC calls to the system controller FW.
552 config RTC_DRV_DS1216
553 tristate "Dallas DS1216"
556 If you say yes here you get support for the Dallas DS1216 RTC chips.
558 config RTC_DRV_DS1286
559 tristate "Dallas DS1286"
561 If you say yes here you get support for the Dallas DS1286 RTC chips.
563 config RTC_DRV_DS1302
564 tristate "Dallas DS1302"
565 depends on SH_SECUREEDGE5410
567 If you say yes here you get support for the Dallas DS1302 RTC chips.
569 config RTC_DRV_DS1511
570 tristate "Dallas DS1511"
572 If you say yes here you get support for the
573 Dallas DS1511 timekeeping/watchdog chip.
575 This driver can also be built as a module. If so, the module
576 will be called rtc-ds1511.
578 config RTC_DRV_DS1553
579 tristate "Maxim/Dallas DS1553"
581 If you say yes here you get support for the
582 Maxim/Dallas DS1553 timekeeping chip.
584 This driver can also be built as a module. If so, the module
585 will be called rtc-ds1553.
587 config RTC_DRV_DS1742
588 tristate "Maxim/Dallas DS1742/1743"
590 If you say yes here you get support for the
591 Maxim/Dallas DS1742/1743 timekeeping chip.
593 This driver can also be built as a module. If so, the module
594 will be called rtc-ds1742.
596 config RTC_DRV_DA9052
597 tristate "Dialog DA9052/DA9053 RTC"
598 depends on PMIC_DA9052
600 Say y here to support the RTC driver for Dialog Semiconductor
601 DA9052-BC and DA9053-AA/Bx PMICs.
607 If you say yes here you will get support for the EFI
610 This driver can also be built as a module. If so, the module
611 will be called rtc-efi.
613 config RTC_DRV_STK17TA8
614 tristate "Simtek STK17TA8"
616 If you say yes here you get support for the
617 Simtek STK17TA8 timekeeping chip.
619 This driver can also be built as a module. If so, the module
620 will be called rtc-stk17ta8.
622 config RTC_DRV_M48T86
623 tristate "ST M48T86/Dallas DS12887"
625 If you say Y here you will get support for the
626 ST M48T86 and Dallas DS12887 RTC chips.
628 This driver can also be built as a module. If so, the module
629 will be called rtc-m48t86.
631 config RTC_DRV_M48T35
634 If you say Y here you will get support for the
637 This driver can also be built as a module, if so, the module
638 will be called "rtc-m48t35".
640 config RTC_DRV_M48T59
641 tristate "ST M48T59/M48T08/M48T02"
643 If you say Y here you will get support for the
644 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
646 These chips are usually found in Sun SPARC and UltraSPARC
649 This driver can also be built as a module, if so, the module
650 will be called "rtc-m48t59".
652 config RTC_DRV_MSM6242
653 tristate "Oki MSM6242"
655 If you say yes here you get support for the Oki MSM6242
656 timekeeping chip. It is used in some Amiga models (e.g. A2000).
658 This driver can also be built as a module. If so, the module
659 will be called rtc-msm6242.
661 config RTC_DRV_BQ4802
664 If you say Y here you will get support for the TI
667 This driver can also be built as a module. If so, the module
668 will be called rtc-bq4802.
670 config RTC_DRV_RP5C01
671 tristate "Ricoh RP5C01"
673 If you say yes here you get support for the Ricoh RP5C01
674 timekeeping chip. It is used in some Amiga models (e.g. A3000
677 This driver can also be built as a module. If so, the module
678 will be called rtc-rp5c01.
681 tristate "EM Microelectronic V3020"
683 If you say yes here you will get support for the
684 EM Microelectronic v3020 RTC chip.
686 This driver can also be built as a module. If so, the module
687 will be called rtc-v3020.
689 config RTC_DRV_DS2404
690 tristate "Dallas DS2404"
692 If you say yes here you get support for the
693 Dallas DS2404 RTC chip.
695 This driver can also be built as a module. If so, the module
696 will be called rtc-ds2404.
698 config RTC_DRV_WM831X
699 tristate "Wolfson Microelectronics WM831x RTC"
700 depends on MFD_WM831X
702 If you say yes here you will get support for the RTC subsystem
703 of the Wolfson Microelectronics WM831X series PMICs.
705 This driver can also be built as a module. If so, the module
706 will be called "rtc-wm831x".
708 config RTC_DRV_WM8350
709 tristate "Wolfson Microelectronics WM8350 RTC"
710 depends on MFD_WM8350
712 If you say yes here you will get support for the RTC subsystem
713 of the Wolfson Microelectronics WM8350.
715 This driver can also be built as a module. If so, the module
716 will be called "rtc-wm8350".
719 tristate "SPEAR ST RTC"
720 depends on PLAT_SPEAR
723 If you say Y here you will get support for the RTC found on
726 config RTC_DRV_PCF50633
727 depends on MFD_PCF50633
728 tristate "NXP PCF50633 RTC"
730 If you say yes here you get support for the RTC subsystem of the
731 NXP PCF50633 used in embedded systems.
733 config RTC_DRV_AB3100
734 tristate "ST-Ericsson AB3100 RTC"
735 depends on AB3100_CORE
736 default y if AB3100_CORE
738 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
739 support. This chip contains a battery- and capacitor-backed RTC.
741 config RTC_DRV_AB8500
742 tristate "ST-Ericsson AB8500 RTC"
743 depends on AB8500_CORE
745 select RTC_INTF_DEV_UIE_EMUL
747 Select this to enable the ST-Ericsson AB8500 power management IC RTC
748 support. This chip contains a battery- and capacitor-backed RTC.
750 config RTC_DRV_NUC900
751 tristate "NUC910/NUC920 RTC driver"
752 depends on ARCH_W90X900
754 If you say yes here you get support for the RTC subsystem of the
755 NUC910/NUC920 used in embedded systems.
757 comment "on-CPU RTC drivers"
759 config RTC_DRV_DAVINCI
760 tristate "TI DaVinci RTC"
761 depends on ARCH_DAVINCI_DM365
763 If you say yes here you get support for the RTC on the
764 DaVinci platforms (DM365).
766 This driver can also be built as a module. If so, the module
767 will be called rtc-davinci.
770 tristate "Freescale IMX DryIce Real Time Clock"
773 Support for Freescale IMX DryIce RTC
775 This driver can also be built as a module, if so, the module
776 will be called "rtc-imxdi".
780 depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX
782 Say "yes" here to support the real time clock on TI OMAP1 and
783 DA8xx/OMAP-L13x chips. This driver can also be built as a
784 module called rtc-omap.
789 This will include RTC support for Samsung SoCs. If
790 you want to include RTC support for any machine, kindly
791 select this in the respective mach-XXXX/Kconfig file.
794 tristate "Samsung S3C series SoC RTC"
795 depends on ARCH_S3C64XX || HAVE_S3C_RTC
797 RTC (Realtime Clock) driver for the clock inbuilt into the
798 Samsung S3C24XX series of SoCs. This can provide periodic
799 interrupt rates from 1Hz to 64Hz for user programs, and
802 The driver currently supports the common features on all the
803 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
806 This driver can also be build as a module. If so, the module
807 will be called rtc-s3c.
809 config RTC_DRV_EP93XX
810 tristate "Cirrus Logic EP93XX"
811 depends on ARCH_EP93XX
813 If you say yes here you get support for the
814 RTC embedded in the Cirrus Logic EP93XX processors.
816 This driver can also be built as a module. If so, the module
817 will be called rtc-ep93xx.
819 config RTC_DRV_SA1100
820 tristate "SA11x0/PXA2xx/PXA910"
821 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
823 If you say Y here you will get access to the real time clock
824 built into your SA11x0 or PXA2xx CPU.
826 To compile this driver as a module, choose M here: the
827 module will be called rtc-sa1100.
830 tristate "SuperH On-Chip RTC"
831 depends on SUPERH && HAVE_CLK
833 Say Y here to enable support for the on-chip RTC found in
834 most SuperH processors.
836 To compile this driver as a module, choose M here: the
837 module will be called rtc-sh.
839 config RTC_DRV_VR41XX
840 tristate "NEC VR41XX"
841 depends on CPU_VR41XX
843 If you say Y here you will get access to the real time clock
844 built into your NEC VR41XX CPU.
846 To compile this driver as a module, choose M here: the
847 module will be called rtc-vr41xx.
850 tristate "ARM AMBA PL030 RTC"
853 If you say Y here you will get access to ARM AMBA
854 PrimeCell PL030 RTC found on certain ARM SOCs.
856 To compile this driver as a module, choose M here: the
857 module will be called rtc-pl030.
860 tristate "ARM AMBA PL031 RTC"
863 If you say Y here you will get access to ARM AMBA
864 PrimeCell PL031 RTC found on certain ARM SOCs.
866 To compile this driver as a module, choose M here: the
867 module will be called rtc-pl031.
869 config RTC_DRV_AT32AP700X
870 tristate "AT32AP700X series RTC"
871 depends on PLATFORM_AT32AP
873 Driver for the internal RTC (Realtime Clock) on Atmel AVR32
874 AT32AP700x family processors.
876 config RTC_DRV_AT91RM9200
877 tristate "AT91RM9200 or some AT91SAM9 RTC"
880 Driver for the internal RTC (Realtime Clock) module found on
881 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
882 this is powered by the backup power supply.
884 config RTC_DRV_AT91SAM9
885 tristate "AT91SAM9x/AT91CAP9 RTT as RTC"
886 depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
888 RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
889 (Real Time Timer). These timers are powered by the backup power
890 supply (such as a small coin cell battery), but do not need to
893 (On AT91SAM9rl and AT91SAM9G45 chips you probably want to use the
894 dedicated RTC module and leave the RTT available for other uses.)
896 config RTC_DRV_AT91SAM9_RTT
900 prompt "RTT module Number" if ARCH_AT91SAM9263
901 depends on RTC_DRV_AT91SAM9
903 More than one RTT module is available. You can choose which
904 one will be used as an RTC. The default of zero is normally
905 OK to use, though some systems use that for non-RTC purposes.
907 config RTC_DRV_AT91SAM9_GPBR
909 range 0 3 if !ARCH_AT91SAM9263
910 range 0 15 if ARCH_AT91SAM9263
912 prompt "Backup Register Number"
913 depends on RTC_DRV_AT91SAM9
915 The RTC driver needs to use one of the General Purpose Backup
916 Registers (GPBRs) as well as the RTT. You can choose which one
917 will be used. The default of zero is normally OK to use, but
918 on some systems other software needs to use that register.
920 config RTC_DRV_AU1XXX
921 tristate "Au1xxx Counter0 RTC support"
922 depends on MIPS_ALCHEMY
924 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
925 counter) to be used as a RTC.
927 This driver can also be built as a module. If so, the module
928 will be called rtc-au1xxx.
931 tristate "Blackfin On-Chip RTC"
932 depends on BLACKFIN && !BF561
934 If you say yes here you will get support for the
935 Blackfin On-Chip Real Time Clock.
937 This driver can also be built as a module. If so, the module
938 will be called rtc-bfin.
940 config RTC_DRV_RS5C313
941 tristate "Ricoh RS5C313"
942 depends on SH_LANDISK
944 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
946 config RTC_DRV_GENERIC
947 tristate "Generic RTC support"
948 # Please consider writing a new RTC driver instead of using the generic
950 depends on PARISC || M68K || PPC || SUPERH32
952 Say Y or M here to enable RTC support on systems using the generic
953 RTC abstraction. If you do not know what you are doing, you should
957 tristate "PXA27x/PXA3xx"
960 If you say Y here you will get access to the real time clock
961 built into your PXA27x or PXA3xx CPU.
963 This RTC driver uses PXA RTC registers available since pxa27x
964 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
966 config RTC_DRV_VT8500
967 tristate "VIA/WonderMedia 85xx SoC RTC"
968 depends on ARCH_VT8500
970 If you say Y here you will get access to the real time clock
971 built into your VIA VT8500 SoC or its relatives.
975 bool "SUN4V Hypervisor RTC"
978 If you say Y here you will get support for the Hypervisor
979 based RTC on SUN4V systems.
981 config RTC_DRV_STARFIRE
985 If you say Y here you will get support for the RTC found on
988 config RTC_DRV_TX4939
989 tristate "TX4939 SoC"
990 depends on SOC_TX4939
992 Driver for the internal RTC (Realtime Clock) module found on
996 tristate "Marvell SoC RTC"
997 depends on ARCH_KIRKWOOD || ARCH_DOVE
999 If you say yes here you will get support for the in-chip RTC
1000 that can be found in some of Marvell's SoC devices, such as
1001 the Kirkwood 88F6281 and 88F6192.
1003 This driver can also be built as a module. If so, the module
1004 will be called rtc-mv.
1010 If you say yes here you will get support for the RTC on PS3.
1012 This driver can also be built as a module. If so, the module
1013 will be called rtc-ps3.
1015 config RTC_DRV_COH901331
1016 tristate "ST-Ericsson COH 901 331 RTC"
1017 depends on ARCH_U300
1019 If you say Y here you will get access to ST-Ericsson
1020 COH 901 331 RTC clock found in some ST-Ericsson Mobile
1023 This driver can also be built as a module. If so, the module
1024 will be called "rtc-coh901331".
1028 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1031 If you say yes here you will get support for the onboard
1032 STMP3xxx/i.MX23/i.MX28 RTC.
1034 This driver can also be built as a module. If so, the module
1035 will be called rtc-stmp3xxx.
1041 If you say Y here you will get support for the RTC found on
1042 the PCAP2 ASIC used on some Motorola phones.
1044 config RTC_DRV_MC13XXX
1045 depends on MFD_MC13XXX
1046 tristate "Freescale MC13xxx RTC"
1048 This enables support for the RTCs found on Freescale's PMICs
1049 MC13783 and MC13892.
1051 config RTC_DRV_MPC5121
1052 tristate "Freescale MPC5121 built-in RTC"
1053 depends on PPC_MPC512x || PPC_MPC52xx
1055 If you say yes here you will get support for the
1056 built-in RTC on MPC5121 or on MPC5200.
1058 This driver can also be built as a module. If so, the module
1059 will be called rtc-mpc5121.
1061 config RTC_DRV_JZ4740
1062 tristate "Ingenic JZ4740 SoC"
1063 depends on MACH_JZ4740
1065 If you say yes here you get support for the Ingenic JZ4740 SoC RTC
1068 This driver can also be buillt as a module. If so, the module
1069 will be called rtc-jz4740.
1071 config RTC_DRV_LPC32XX
1072 depends on ARCH_LPC32XX
1073 tristate "NXP LPC32XX RTC"
1075 This enables support for the NXP RTC in the LPC32XX
1077 This driver can also be buillt as a module. If so, the module
1078 will be called rtc-lpc32xx.
1080 config RTC_DRV_PM8XXX
1081 tristate "Qualcomm PMIC8XXX RTC"
1082 depends on MFD_PM8XXX
1084 If you say yes here you get support for the
1085 Qualcomm PMIC8XXX RTC.
1087 To compile this driver as a module, choose M here: the
1088 module will be called rtc-pm8xxx.
1090 config RTC_DRV_TEGRA
1091 tristate "NVIDIA Tegra Internal RTC driver"
1092 depends on ARCH_TEGRA
1094 If you say yes here you get support for the
1095 Tegra 200 series internal RTC module.
1097 This drive can also be built as a module. If so, the module
1098 will be called rtc-tegra.
1101 tristate "Tilera hypervisor RTC support"
1104 Enable support for the Linux driver side of the Tilera
1105 hypervisor's real-time clock interface.
1108 tristate "PKUnity v3 RTC support"
1109 depends on ARCH_PUV3
1111 This enables support for the RTC in the PKUnity-v3 SoCs.
1113 This drive can also be built as a module. If so, the module
1114 will be called rtc-puv3.
1116 config RTC_DRV_LOONGSON1
1117 tristate "loongson1 RTC support"
1118 depends on MACH_LOONGSON1
1120 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1121 counter) to be used as a RTC.
1123 This driver can also be built as a module. If so, the module
1124 will be called rtc-ls1x.
1127 tristate "Freescale MXC Real Time Clock"
1130 If you say yes here you get support for the Freescale MXC
1133 This driver can also be built as a module, if so, the module
1134 will be called "rtc-mxc".
1137 tristate "Freescale SNVS RTC support"
1138 depends on HAS_IOMEM
1141 If you say yes here you get support for the Freescale SNVS
1142 Low Power (LP) RTC module.
1144 This driver can also be built as a module, if so, the module
1145 will be called "rtc-snvs".