2 # RTC class/drivers configuration
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"
22 depends on RTC_CLASS = y
25 If you say yes here, the system time (wall clock) will be set using
26 the value read from a specified RTC device. This is useful to avoid
27 unnecessary fsck runs at boot time, and to network better.
29 config RTC_HCTOSYS_DEVICE
30 string "RTC used to set the system time"
31 depends on RTC_HCTOSYS = y
34 The RTC device that will be used to (re)initialize the system
35 clock, usually rtc0. Initialization is done when the system
36 starts up, and when it resumes from a low power state. This
37 device should record time in UTC, since the kernel won't do
40 The driver for this RTC device must be loaded before late_initcall
41 functions run, so it must usually be statically linked.
43 This clock should be battery-backed, so that it reads the correct
44 time when the system boots from a power-off state. Otherwise, your
45 system will need an external clock source (like an NTP server).
47 If the clock you specify here is not battery backed, it may still
48 be useful to reinitialize system time when resuming from system
49 sleep states. Do not specify an RTC here unless it stays powered
50 during all this system's supported sleep states.
53 bool "RTC debug support"
54 depends on RTC_CLASS = y
56 Say yes here to enable debugging support in the RTC framework
57 and individual RTC drivers.
59 comment "RTC interfaces"
62 boolean "/sys/class/rtc/rtcN (sysfs)"
66 Say yes here if you want to use your RTCs using sysfs interfaces,
67 /sys/class/rtc/rtc0 through /sys/.../rtcN.
72 boolean "/proc/driver/rtc (procfs for rtc0)"
76 Say yes here if you want to use your first RTC through the proc
77 interface, /proc/driver/rtc. Other RTCs will not be available
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 RTC_CLASS && 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_DS1307
139 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
141 If you say yes here you get support for various compatible RTC
142 chips (often with battery backup) connected with I2C. This driver
143 should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
144 EPSON RX-8025 and probably other chips. In some cases the RTC
145 must already have been initialized (by manufacturing or a
148 The first seven registers on these chips hold an RTC, and other
149 registers may add features such as NVRAM, a trickle charger for
150 the RTC/NVRAM backup power, and alarms. NVRAM is visible in
151 sysfs, but other chip features may not be available.
153 This driver can also be built as a module. If so, the module
154 will be called rtc-ds1307.
156 config RTC_DRV_DS1374
157 tristate "Dallas/Maxim DS1374"
158 depends on RTC_CLASS && I2C
160 If you say yes here you get support for Dallas Semiconductor
161 DS1374 real-time clock chips. If an interrupt is associated
162 with the device, the alarm functionality is supported.
164 This driver can also be built as a module. If so, the module
165 will be called rtc-ds1374.
167 config RTC_DRV_DS1672
168 tristate "Dallas/Maxim DS1672"
170 If you say yes here you get support for the
171 Dallas/Maxim DS1672 timekeeping chip.
173 This driver can also be built as a module. If so, the module
174 will be called rtc-ds1672.
176 config RTC_DRV_DS3232
177 tristate "Dallas/Maxim DS3232"
178 depends on RTC_CLASS && I2C
180 If you say yes here you get support for Dallas Semiconductor
181 DS3232 real-time clock chips. If an interrupt is associated
182 with the device, the alarm functionality is supported.
184 This driver can also be built as a module. If so, the module
185 will be called rtc-ds3232.
187 config RTC_DRV_MAX6900
188 tristate "Maxim MAX6900"
190 If you say yes here you will get support for the
191 Maxim MAX6900 I2C RTC chip.
193 This driver can also be built as a module. If so, the module
194 will be called rtc-max6900.
196 config RTC_DRV_MAX8925
197 tristate "Maxim MAX8925"
198 depends on MFD_MAX8925
200 If you say yes here you will get support for the
201 RTC of Maxim MAX8925 PMIC.
203 This driver can also be built as a module. If so, the module
204 will be called rtc-max8925.
206 config RTC_DRV_MAX8998
207 tristate "Maxim MAX8998"
208 depends on MFD_MAX8998
210 If you say yes here you will get support for the
211 RTC of Maxim MAX8998 PMIC.
213 This driver can also be built as a module. If so, the module
214 will be called rtc-max8998.
216 config RTC_DRV_RS5C372
217 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
219 If you say yes here you get support for the
220 Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
222 This driver can also be built as a module. If so, the module
223 will be called rtc-rs5c372.
225 config RTC_DRV_ISL1208
226 tristate "Intersil ISL1208"
228 If you say yes here you get support for the
229 Intersil ISL1208 RTC chip.
231 This driver can also be built as a module. If so, the module
232 will be called rtc-isl1208.
234 config RTC_DRV_ISL12022
235 tristate "Intersil ISL12022"
237 If you say yes here you get support for the
238 Intersil ISL12022 RTC chip.
240 This driver can also be built as a module. If so, the module
241 will be called rtc-isl12022.
244 tristate "Xicor/Intersil X1205"
246 If you say yes here you get support for the
247 Xicor/Intersil X1205 RTC chip.
249 This driver can also be built as a module. If so, the module
250 will be called rtc-x1205.
252 config RTC_DRV_PCF8563
253 tristate "Philips PCF8563/Epson RTC8564"
255 If you say yes here you get support for the
256 Philips PCF8563 RTC chip. The Epson RTC8564
259 This driver can also be built as a module. If so, the module
260 will be called rtc-pcf8563.
262 config RTC_DRV_PCF8583
263 tristate "Philips PCF8583"
265 If you say yes here you get support for the Philips PCF8583
266 RTC chip found on Acorn RiscPCs. This driver supports the
267 platform specific method of retrieving the current year from
268 the RTC's SRAM. It will work on other platforms with the same
269 chip, but the year will probably have to be tweaked.
271 This driver can also be built as a module. If so, the module
272 will be called rtc-pcf8583.
274 config RTC_DRV_M41T80
275 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87"
277 If you say Y here you will get support for the ST M41T60
278 and M41T80 RTC chips series. Currently, the following chips are
279 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
280 M41ST85, and M41ST87.
282 This driver can also be built as a module. If so, the module
283 will be called rtc-m41t80.
285 config RTC_DRV_M41T80_WDT
286 bool "ST M41T65/M41T80 series RTC watchdog timer"
287 depends on RTC_DRV_M41T80
289 If you say Y here you will get support for the
290 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
293 tristate "TI BQ32000"
295 If you say Y here you will get support for the TI
296 BQ32000 I2C RTC chip.
298 This driver can also be built as a module. If so, the module
299 will be called rtc-bq32k.
301 config RTC_DRV_DM355EVM
302 tristate "TI DaVinci DM355 EVM RTC"
303 depends on MFD_DM355EVM_MSP
305 Supports the RTC firmware in the MSP430 on the DM355 EVM.
307 config RTC_DRV_TWL92330
308 boolean "TI TWL92330/Menelaus"
311 If you say yes here you get support for the RTC on the
312 TWL92330 "Menelaus" power management chip, used with OMAP2
313 platforms. The support is integrated with the rest of
314 the Menelaus driver; it's not separate module.
316 config RTC_DRV_TWL4030
317 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
318 depends on RTC_CLASS && TWL4030_CORE
320 If you say yes here you get support for the RTC on the
321 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
323 This driver can also be built as a module. If so, the module
324 will be called rtc-twl.
326 config RTC_DRV_S35390A
327 tristate "Seiko Instruments S-35390A"
330 If you say yes here you will get support for the Seiko
331 Instruments S-35390A.
333 This driver can also be built as a module. If so the module
334 will be called rtc-s35390a.
336 config RTC_DRV_FM3130
337 tristate "Ramtron FM3130"
339 If you say Y here you will get support for the
340 Ramtron FM3130 RTC chips.
341 Ramtron FM3130 is a chip with two separate devices inside,
342 RTC clock and FRAM. This driver provides only RTC functionality.
344 This driver can also be built as a module. If so the module
345 will be called rtc-fm3130.
347 config RTC_DRV_RX8581
348 tristate "Epson RX-8581"
350 If you say yes here you will get support for the Epson RX-8581.
352 This driver can also be built as a module. If so the module
353 will be called rtc-rx8581.
355 config RTC_DRV_RX8025
356 tristate "Epson RX-8025SA/NB"
358 If you say yes here you get support for the Epson
359 RX-8025SA/NB RTC chips.
361 This driver can also be built as a module. If so, the module
362 will be called rtc-rx8025.
364 config RTC_DRV_EM3027
365 tristate "EM Microelectronic EM3027"
367 If you say yes here you get support for the EM
368 Microelectronic EM3027 RTC chips.
370 This driver can also be built as a module. If so, the module
371 will be called rtc-em3027.
375 comment "SPI RTC drivers"
379 config RTC_DRV_M41T94
382 If you say yes here you will get support for the
383 ST M41T94 SPI RTC chip.
385 This driver can also be built as a module. If so, the module
386 will be called rtc-m41t94.
388 config RTC_DRV_DS1305
389 tristate "Dallas/Maxim DS1305/DS1306"
391 Select this driver to get support for the Dallas/Maxim DS1305
392 and DS1306 real time clock chips. These support a trickle
393 charger, alarms, and NVRAM in addition to the clock.
395 This driver can also be built as a module. If so, the module
396 will be called rtc-ds1305.
398 config RTC_DRV_DS1390
399 tristate "Dallas/Maxim DS1390/93/94"
401 If you say yes here you get support for the
402 Dallas/Maxim DS1390/93/94 chips.
404 This driver only supports the RTC feature, and not other chip
405 features such as alarms and trickle charging.
407 This driver can also be built as a module. If so, the module
408 will be called rtc-ds1390.
410 config RTC_DRV_MAX6902
411 tristate "Maxim MAX6902"
413 If you say yes here you will get support for the
414 Maxim MAX6902 SPI RTC chip.
416 This driver can also be built as a module. If so, the module
417 will be called rtc-max6902.
420 tristate "Epson RTC-9701JE"
422 If you say yes here you will get support for the
423 Epson RTC-9701JE SPI RTC chip.
425 This driver can also be built as a module. If so, the module
426 will be called rtc-r9701.
428 config RTC_DRV_RS5C348
429 tristate "Ricoh RS5C348A/B"
431 If you say yes here you get support for the
432 Ricoh RS5C348A and RS5C348B RTC chips.
434 This driver can also be built as a module. If so, the module
435 will be called rtc-rs5c348.
437 config RTC_DRV_DS3234
438 tristate "Maxim/Dallas DS3234"
440 If you say yes here you get support for the
441 Maxim/Dallas DS3234 SPI RTC chip.
443 This driver can also be built as a module. If so, the module
444 will be called rtc-ds3234.
446 config RTC_DRV_PCF2123
447 tristate "NXP PCF2123"
449 If you say yes here you get support for the NXP PCF2123
452 This driver can also be built as a module. If so, the module
453 will be called rtc-pcf2123.
457 comment "Platform RTC drivers"
459 # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
460 # requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
461 # global rtc_lock ... it's not yet just another platform_device.
464 tristate "PC-style 'CMOS'"
465 depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS || SPARC64
468 Say "yes" here to get direct support for the real time clock
469 found in every PC or ACPI-based system, and some other boards.
470 Specifically the original MC146818, compatibles like those in
471 PC south bridges, the DS12887 or M48T86, some multifunction
472 or LPC bus chips, and so on.
474 Your system will need to define the platform device used by
475 this driver, otherwise it won't be accessible. This means
476 you can safely enable this driver if you don't know whether
477 or not your board has this kind of hardware.
479 This driver can also be built as a module. If so, the module
480 will be called rtc-cmos.
483 tristate "Virtual RTC for Moorestown platforms"
485 default y if X86_MRST
488 Say "yes" here to get direct support for the real time clock
489 found on Moorestown platforms. The VRTC is a emulated RTC that
490 derives its clock source from a real RTC in the PMIC. The MC146818
491 style programming interface is mostly conserved, but any
492 updates are done via IPC calls to the system controller FW.
494 config RTC_DRV_DS1216
495 tristate "Dallas DS1216"
498 If you say yes here you get support for the Dallas DS1216 RTC chips.
500 config RTC_DRV_DS1286
501 tristate "Dallas DS1286"
503 If you say yes here you get support for the Dallas DS1286 RTC chips.
505 config RTC_DRV_DS1302
506 tristate "Dallas DS1302"
507 depends on SH_SECUREEDGE5410
509 If you say yes here you get support for the Dallas DS1302 RTC chips.
511 config RTC_DRV_DS1511
512 tristate "Dallas DS1511"
515 If you say yes here you get support for the
516 Dallas DS1511 timekeeping/watchdog chip.
518 This driver can also be built as a module. If so, the module
519 will be called rtc-ds1511.
521 config RTC_DRV_DS1553
522 tristate "Maxim/Dallas DS1553"
524 If you say yes here you get support for the
525 Maxim/Dallas DS1553 timekeeping chip.
527 This driver can also be built as a module. If so, the module
528 will be called rtc-ds1553.
530 config RTC_DRV_DS1742
531 tristate "Maxim/Dallas DS1742/1743"
533 If you say yes here you get support for the
534 Maxim/Dallas DS1742/1743 timekeeping chip.
536 This driver can also be built as a module. If so, the module
537 will be called rtc-ds1742.
543 If you say yes here you will get support for the EFI
546 This driver can also be built as a module. If so, the module
547 will be called rtc-efi.
549 config RTC_DRV_STK17TA8
550 tristate "Simtek STK17TA8"
553 If you say yes here you get support for the
554 Simtek STK17TA8 timekeeping chip.
556 This driver can also be built as a module. If so, the module
557 will be called rtc-stk17ta8.
559 config RTC_DRV_M48T86
560 tristate "ST M48T86/Dallas DS12887"
562 If you say Y here you will get support for the
563 ST M48T86 and Dallas DS12887 RTC chips.
565 This driver can also be built as a module. If so, the module
566 will be called rtc-m48t86.
568 config RTC_DRV_M48T35
571 If you say Y here you will get support for the
574 This driver can also be built as a module, if so, the module
575 will be called "rtc-m48t35".
577 config RTC_DRV_M48T59
578 tristate "ST M48T59/M48T08/M48T02"
580 If you say Y here you will get support for the
581 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
583 These chips are usually found in Sun SPARC and UltraSPARC
586 This driver can also be built as a module, if so, the module
587 will be called "rtc-m48t59".
589 config RTC_DRV_MSM6242
590 tristate "Oki MSM6242"
592 If you say yes here you get support for the Oki MSM6242
593 timekeeping chip. It is used in some Amiga models (e.g. A2000).
595 This driver can also be built as a module. If so, the module
596 will be called rtc-msm6242.
599 tristate "Freescale IMX DryIce Real Time Clock"
603 Support for Freescale IMX DryIce RTC
605 This driver can also be built as a module, if so, the module
606 will be called "rtc-imxdi".
609 tristate "Freescale MXC Real Time Clock"
613 If you say yes here you get support for the Freescale MXC
616 This driver can also be built as a module, if so, the module
617 will be called "rtc-mxc".
619 config RTC_DRV_BQ4802
622 If you say Y here you will get support for the TI
625 This driver can also be built as a module. If so, the module
626 will be called rtc-bq4802.
628 config RTC_DRV_RP5C01
629 tristate "Ricoh RP5C01"
631 If you say yes here you get support for the Ricoh RP5C01
632 timekeeping chip. It is used in some Amiga models (e.g. A3000
635 This driver can also be built as a module. If so, the module
636 will be called rtc-rp5c01.
639 tristate "EM Microelectronic V3020"
641 If you say yes here you will get support for the
642 EM Microelectronic v3020 RTC chip.
644 This driver can also be built as a module. If so, the module
645 will be called rtc-v3020.
647 config RTC_DRV_WM831X
648 tristate "Wolfson Microelectronics WM831x RTC"
649 depends on MFD_WM831X
651 If you say yes here you will get support for the RTC subsystem
652 of the Wolfson Microelectronics WM831X series PMICs.
654 This driver can also be built as a module. If so, the module
655 will be called "rtc-wm831x".
657 config RTC_DRV_WM8350
658 tristate "Wolfson Microelectronics WM8350 RTC"
659 depends on MFD_WM8350
661 If you say yes here you will get support for the RTC subsystem
662 of the Wolfson Microelectronics WM8350.
664 This driver can also be built as a module. If so, the module
665 will be called "rtc-wm8350".
667 config RTC_DRV_PCF50633
668 depends on MFD_PCF50633
669 tristate "NXP PCF50633 RTC"
671 If you say yes here you get support for the RTC subsystem of the
672 NXP PCF50633 used in embedded systems.
674 config RTC_DRV_AB3100
675 tristate "ST-Ericsson AB3100 RTC"
676 depends on AB3100_CORE
677 default y if AB3100_CORE
679 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
680 support. This chip contains a battery- and capacitor-backed RTC.
682 config RTC_DRV_AB8500
683 tristate "ST-Ericsson AB8500 RTC"
684 depends on AB8500_CORE
686 Select this to enable the ST-Ericsson AB8500 power management IC RTC
687 support. This chip contains a battery- and capacitor-backed RTC.
689 config RTC_DRV_NUC900
690 tristate "NUC910/NUC920 RTC driver"
691 depends on RTC_CLASS && ARCH_W90X900
693 If you say yes here you get support for the RTC subsystem of the
694 NUC910/NUC920 used in embedded systems.
696 comment "on-CPU RTC drivers"
698 config RTC_DRV_DAVINCI
699 tristate "TI DaVinci RTC"
700 depends on ARCH_DAVINCI_DM365
702 If you say yes here you get support for the RTC on the
703 DaVinci platforms (DM365).
705 This driver can also be built as a module. If so, the module
706 will be called rtc-davinci.
710 depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX
712 Say "yes" here to support the real time clock on TI OMAP1 and
713 DA8xx/OMAP-L13x chips. This driver can also be built as a
714 module called rtc-omap.
719 This will include RTC support for Samsung SoCs. If
720 you want to include RTC support for any machine, kindly
721 select this in the respective mach-XXXX/Kconfig file.
724 tristate "Samsung S3C series SoC RTC"
725 depends on ARCH_S3C2410 || ARCH_S3C64XX || HAVE_S3C_RTC
727 RTC (Realtime Clock) driver for the clock inbuilt into the
728 Samsung S3C24XX series of SoCs. This can provide periodic
729 interrupt rates from 1Hz to 64Hz for user programs, and
732 The driver currently supports the common features on all the
733 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
736 This driver can also be build as a module. If so, the module
737 will be called rtc-s3c.
739 config RTC_DRV_EP93XX
740 tristate "Cirrus Logic EP93XX"
741 depends on ARCH_EP93XX
743 If you say yes here you get support for the
744 RTC embedded in the Cirrus Logic EP93XX processors.
746 This driver can also be built as a module. If so, the module
747 will be called rtc-ep93xx.
749 config RTC_DRV_SA1100
750 tristate "SA11x0/PXA2xx"
751 depends on ARCH_SA1100 || ARCH_PXA
753 If you say Y here you will get access to the real time clock
754 built into your SA11x0 or PXA2xx CPU.
756 To compile this driver as a module, choose M here: the
757 module will be called rtc-sa1100.
760 tristate "SuperH On-Chip RTC"
761 depends on RTC_CLASS && SUPERH && HAVE_CLK
763 Say Y here to enable support for the on-chip RTC found in
764 most SuperH processors.
766 To compile this driver as a module, choose M here: the
767 module will be called rtc-sh.
769 config RTC_DRV_VR41XX
770 tristate "NEC VR41XX"
771 depends on CPU_VR41XX
773 If you say Y here you will get access to the real time clock
774 built into your NEC VR41XX CPU.
776 To compile this driver as a module, choose M here: the
777 module will be called rtc-vr41xx.
780 tristate "ARM AMBA PL030 RTC"
783 If you say Y here you will get access to ARM AMBA
784 PrimeCell PL030 RTC found on certain ARM SOCs.
786 To compile this driver as a module, choose M here: the
787 module will be called rtc-pl030.
790 tristate "ARM AMBA PL031 RTC"
793 If you say Y here you will get access to ARM AMBA
794 PrimeCell PL031 RTC found on certain ARM SOCs.
796 To compile this driver as a module, choose M here: the
797 module will be called rtc-pl031.
799 config RTC_DRV_AT32AP700X
800 tristate "AT32AP700X series RTC"
801 depends on PLATFORM_AT32AP
803 Driver for the internal RTC (Realtime Clock) on Atmel AVR32
804 AT32AP700x family processors.
806 config RTC_DRV_AT91RM9200
807 tristate "AT91RM9200 or some AT91SAM9 RTC"
808 depends on ARCH_AT91RM9200 || ARCH_AT91SAM9RL || ARCH_AT91SAM9G45
810 Driver for the internal RTC (Realtime Clock) module found on
811 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
812 this is powered by the backup power supply.
814 config RTC_DRV_AT91SAM9
815 tristate "AT91SAM9x/AT91CAP9 RTT as RTC"
816 depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
818 RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
819 (Real Time Timer). These timers are powered by the backup power
820 supply (such as a small coin cell battery), but do not need to
823 (On AT91SAM9rl and AT91SAM9G45 chips you probably want to use the
824 dedicated RTC module and leave the RTT available for other uses.)
826 config RTC_DRV_AT91SAM9_RTT
830 prompt "RTT module Number" if ARCH_AT91SAM9263
831 depends on RTC_DRV_AT91SAM9
833 More than one RTT module is available. You can choose which
834 one will be used as an RTC. The default of zero is normally
835 OK to use, though some systems use that for non-RTC purposes.
837 config RTC_DRV_AT91SAM9_GPBR
839 range 0 3 if !ARCH_AT91SAM9263
840 range 0 15 if ARCH_AT91SAM9263
842 prompt "Backup Register Number"
843 depends on RTC_DRV_AT91SAM9
845 The RTC driver needs to use one of the General Purpose Backup
846 Registers (GPBRs) as well as the RTT. You can choose which one
847 will be used. The default of zero is normally OK to use, but
848 on some systems other software needs to use that register.
850 config RTC_DRV_AU1XXX
851 tristate "Au1xxx Counter0 RTC support"
852 depends on MIPS_ALCHEMY
854 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
855 counter) to be used as a RTC.
857 This driver can also be built as a module. If so, the module
858 will be called rtc-au1xxx.
861 tristate "Blackfin On-Chip RTC"
862 depends on BLACKFIN && !BF561
864 If you say yes here you will get support for the
865 Blackfin On-Chip Real Time Clock.
867 This driver can also be built as a module. If so, the module
868 will be called rtc-bfin.
870 config RTC_DRV_RS5C313
871 tristate "Ricoh RS5C313"
872 depends on SH_LANDISK
874 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
876 config RTC_DRV_GENERIC
877 tristate "Generic RTC support"
878 # Please consider writing a new RTC driver instead of using the generic
880 depends on PARISC || M68K || PPC || SUPERH32
882 Say Y or M here to enable RTC support on systems using the generic
883 RTC abstraction. If you do not know what you are doing, you should
887 tristate "PXA27x/PXA3xx"
890 If you say Y here you will get access to the real time clock
891 built into your PXA27x or PXA3xx CPU.
893 This RTC driver uses PXA RTC registers available since pxa27x
894 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
896 config RTC_DRV_VT8500
897 tristate "VIA/WonderMedia 85xx SoC RTC"
898 depends on ARCH_VT8500
900 If you say Y here you will get access to the real time clock
901 built into your VIA VT8500 SoC or its relatives.
905 bool "SUN4V Hypervisor RTC"
908 If you say Y here you will get support for the Hypervisor
909 based RTC on SUN4V systems.
911 config RTC_DRV_STARFIRE
915 If you say Y here you will get support for the RTC found on
918 config RTC_DRV_TX4939
919 tristate "TX4939 SoC"
920 depends on SOC_TX4939
922 Driver for the internal RTC (Realtime Clock) module found on
926 tristate "Marvell SoC RTC"
927 depends on ARCH_KIRKWOOD || ARCH_DOVE
929 If you say yes here you will get support for the in-chip RTC
930 that can be found in some of Marvell's SoC devices, such as
931 the Kirkwood 88F6281 and 88F6192.
933 This driver can also be built as a module. If so, the module
934 will be called rtc-mv.
940 If you say yes here you will get support for the RTC on PS3.
942 This driver can also be built as a module. If so, the module
943 will be called rtc-ps3.
945 config RTC_DRV_COH901331
946 tristate "ST-Ericsson COH 901 331 RTC"
949 If you say Y here you will get access to ST-Ericsson
950 COH 901 331 RTC clock found in some ST-Ericsson Mobile
953 This driver can also be built as a module. If so, the module
954 will be called "rtc-coh901331".
958 tristate "Freescale STMP3xxx RTC"
959 depends on ARCH_STMP3XXX
961 If you say yes here you will get support for the onboard
964 This driver can also be built as a module. If so, the module
965 will be called rtc-stmp3xxx.
971 If you say Y here you will get support for the RTC found on
972 the PCAP2 ASIC used on some Motorola phones.
974 config RTC_DRV_MC13XXX
975 depends on MFD_MC13XXX
976 tristate "Freescale MC13xxx RTC"
978 This enables support for the RTCs found on Freescale's PMICs
981 config RTC_DRV_MPC5121
982 tristate "Freescale MPC5121 built-in RTC"
983 depends on PPC_MPC512x && RTC_CLASS
985 If you say yes here you will get support for the
986 built-in RTC MPC5121.
988 This driver can also be built as a module. If so, the module
989 will be called rtc-mpc5121.
991 config RTC_DRV_JZ4740
992 tristate "Ingenic JZ4740 SoC"
994 depends on MACH_JZ4740
996 If you say yes here you get support for the Ingenic JZ4740 SoC RTC
999 This driver can also be buillt as a module. If so, the module
1000 will be called rtc-jz4740.
1002 config RTC_DRV_LPC32XX
1003 depends on ARCH_LPC32XX
1004 tristate "NXP LPC32XX RTC"
1006 This enables support for the NXP RTC in the LPC32XX
1008 This driver can also be buillt as a module. If so, the module
1009 will be called rtc-lpc32xx.
1011 config RTC_DRV_TEGRA
1012 tristate "NVIDIA Tegra Internal RTC driver"
1013 depends on RTC_CLASS && ARCH_TEGRA
1015 If you say yes here you get support for the
1016 Tegra 200 series internal RTC module.
1018 This drive can also be built as a module. If so, the module
1019 will be called rtc-tegra.
1022 tristate "Tilera hypervisor RTC support"
1025 Enable support for the Linux driver side of the Tilera
1026 hypervisor's real-time clock interface.