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.
29 bool "Set the RTC time based on NTP synchronization"
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.
36 config RTC_HCTOSYS_DEVICE
37 string "RTC used to set the system time"
38 depends on RTC_HCTOSYS = y || RTC_SYSTOHC = y
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
47 The driver for this RTC device must be loaded before late_initcall
48 functions run, so it must usually be statically linked.
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).
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.
60 bool "RTC debug support"
62 Say yes here to enable debugging support in the RTC framework
63 and individual RTC drivers.
65 comment "RTC interfaces"
68 boolean "/sys/class/rtc/rtcN (sysfs)"
72 Say yes here if you want to use your RTCs using sysfs interfaces,
73 /sys/class/rtc/rtc0 through /sys/.../rtcN.
78 boolean "/proc/driver/rtc (procfs for rtcN)"
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)
91 boolean "/dev/rtcN (character devices)"
94 Say yes here if you want to use your RTCs using the /dev
95 interfaces, which "udev" sets up as /dev/rtc0 through
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.
105 config RTC_INTF_DEV_UIE_EMUL
106 bool "RTC UIE emulation on dev interface"
107 depends on RTC_INTF_DEV
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.
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.
118 tristate "Test driver/device"
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
128 This driver can also be built as a module. If so, the module
129 will be called rtc-test.
131 comment "I2C RTC drivers"
136 config RTC_DRV_88PM860X
137 tristate "Marvell 88PM860x"
138 depends on I2C && MFD_88PM860X
140 If you say yes here you get support for RTC function in Marvell
143 This driver can also be built as a module. If so, the module
144 will be called rtc-88pm860x.
146 config RTC_DRV_88PM80X
147 tristate "Marvell 88PM80x"
148 depends on I2C && MFD_88PM800
150 If you say yes here you get support for RTC function in Marvell
153 This driver can also be built as a module. If so, the module
154 will be called rtc-88pm80x.
156 config RTC_DRV_AS3722
157 tristate "ams AS3722 RTC driver"
158 depends on MFD_AS3722
160 If you say yes here you get support for the RTC of ams AS3722 PMIC
163 This driver can also be built as a module. If so, the module
164 will be called rtc-as3722.
166 config RTC_DRV_DS1307
167 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
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
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.
181 This driver can also be built as a module. If so, the module
182 will be called rtc-ds1307.
184 config RTC_DRV_DS1374
185 tristate "Dallas/Maxim DS1374"
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.
192 This driver can also be built as a module. If so, the module
193 will be called rtc-ds1374.
195 config RTC_DRV_DS1672
196 tristate "Dallas/Maxim DS1672"
198 If you say yes here you get support for the
199 Dallas/Maxim DS1672 timekeeping chip.
201 This driver can also be built as a module. If so, the module
202 will be called rtc-ds1672.
204 config RTC_DRV_DS3232
205 tristate "Dallas/Maxim DS3232"
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.
212 This driver can also be built as a module. If so, the module
213 will be called rtc-ds3232.
215 config RTC_DRV_LP8788
216 tristate "TI LP8788 RTC driver"
217 depends on MFD_LP8788
219 Say Y to enable support for the LP8788 RTC/ALARM driver.
221 config RTC_DRV_MAX6900
222 tristate "Maxim MAX6900"
224 If you say yes here you will get support for the
225 Maxim MAX6900 I2C RTC chip.
227 This driver can also be built as a module. If so, the module
228 will be called rtc-max6900.
230 config RTC_DRV_MAX8907
231 tristate "Maxim MAX8907"
232 depends on MFD_MAX8907
234 If you say yes here you will get support for the
235 RTC of Maxim MAX8907 PMIC.
237 This driver can also be built as a module. If so, the module
238 will be called rtc-max8907.
240 config RTC_DRV_MAX8925
241 tristate "Maxim MAX8925"
242 depends on MFD_MAX8925
244 If you say yes here you will get support for the
245 RTC of Maxim MAX8925 PMIC.
247 This driver can also be built as a module. If so, the module
248 will be called rtc-max8925.
250 config RTC_DRV_MAX8998
251 tristate "Maxim MAX8998"
252 depends on MFD_MAX8998
254 If you say yes here you will get support for the
255 RTC of Maxim MAX8998 PMIC.
257 This driver can also be built as a module. If so, the module
258 will be called rtc-max8998.
260 config RTC_DRV_MAX8997
261 tristate "Maxim MAX8997"
262 depends on MFD_MAX8997
264 If you say yes here you will get support for the
265 RTC of Maxim MAX8997 PMIC.
267 This driver can also be built as a module. If so, the module
268 will be called rtc-max8997.
270 config RTC_DRV_MAX77686
271 tristate "Maxim MAX77686"
272 depends on MFD_MAX77686
274 If you say yes here you will get support for the
275 RTC of Maxim MAX77686 PMIC.
277 This driver can also be built as a module. If so, the module
278 will be called rtc-max77686.
280 config RTC_DRV_RS5C372
281 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
283 If you say yes here you get support for the
284 Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
286 This driver can also be built as a module. If so, the module
287 will be called rtc-rs5c372.
289 config RTC_DRV_ISL1208
290 tristate "Intersil ISL1208"
292 If you say yes here you get support for the
293 Intersil ISL1208 RTC chip.
295 This driver can also be built as a module. If so, the module
296 will be called rtc-isl1208.
298 config RTC_DRV_ISL12022
299 tristate "Intersil ISL12022"
301 If you say yes here you get support for the
302 Intersil ISL12022 RTC chip.
304 This driver can also be built as a module. If so, the module
305 will be called rtc-isl12022.
308 tristate "Xicor/Intersil X1205"
310 If you say yes here you get support for the
311 Xicor/Intersil X1205 RTC chip.
313 This driver can also be built as a module. If so, the module
314 will be called rtc-x1205.
316 config RTC_DRV_PALMAS
317 tristate "TI Palmas RTC driver"
318 depends on MFD_PALMAS
320 If you say yes here you get support for the RTC of TI PALMA series PMIC
323 This driver can also be built as a module. If so, the module
324 will be called rtc-palma.
326 config RTC_DRV_PCF2127
327 tristate "NXP PCF2127"
329 If you say yes here you get support for the NXP PCF2127/29 RTC
332 This driver can also be built as a module. If so, the module
333 will be called rtc-pcf2127.
335 config RTC_DRV_PCF8523
336 tristate "NXP PCF8523"
338 If you say yes here you get support for the NXP PCF8523 RTC
341 This driver can also be built as a module. If so, the module
342 will be called rtc-pcf8523.
344 config RTC_DRV_PCF8563
345 tristate "Philips PCF8563/Epson RTC8564"
347 If you say yes here you get support for the
348 Philips PCF8563 RTC chip. The Epson RTC8564
351 This driver can also be built as a module. If so, the module
352 will be called rtc-pcf8563.
354 config RTC_DRV_PCF8583
355 tristate "Philips PCF8583"
357 If you say yes here you get support for the Philips PCF8583
358 RTC chip found on Acorn RiscPCs. This driver supports the
359 platform specific method of retrieving the current year from
360 the RTC's SRAM. It will work on other platforms with the same
361 chip, but the year will probably have to be tweaked.
363 This driver can also be built as a module. If so, the module
364 will be called rtc-pcf8583.
366 config RTC_DRV_M41T80
367 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87"
369 If you say Y here you will get support for the ST M41T60
370 and M41T80 RTC chips series. Currently, the following chips are
371 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
372 M41ST85, and M41ST87.
374 This driver can also be built as a module. If so, the module
375 will be called rtc-m41t80.
377 config RTC_DRV_M41T80_WDT
378 bool "ST M41T65/M41T80 series RTC watchdog timer"
379 depends on RTC_DRV_M41T80
381 If you say Y here you will get support for the
382 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
385 tristate "TI BQ32000"
387 If you say Y here you will get support for the TI
388 BQ32000 I2C RTC chip.
390 This driver can also be built as a module. If so, the module
391 will be called rtc-bq32k.
393 config RTC_DRV_DM355EVM
394 tristate "TI DaVinci DM355 EVM RTC"
395 depends on MFD_DM355EVM_MSP
397 Supports the RTC firmware in the MSP430 on the DM355 EVM.
399 config RTC_DRV_TWL92330
400 boolean "TI TWL92330/Menelaus"
403 If you say yes here you get support for the RTC on the
404 TWL92330 "Menelaus" power management chip, used with OMAP2
405 platforms. The support is integrated with the rest of
406 the Menelaus driver; it's not separate module.
408 config RTC_DRV_TWL4030
409 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
410 depends on TWL4030_CORE
412 If you say yes here you get support for the RTC on the
413 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
415 This driver can also be built as a module. If so, the module
416 will be called rtc-twl.
418 config RTC_DRV_TPS6586X
419 tristate "TI TPS6586X RTC driver"
420 depends on MFD_TPS6586X
422 TI Power Management IC TPS6586X supports RTC functionality
423 along with alarm. This driver supports the RTC driver for
424 the TPS6586X RTC module.
426 config RTC_DRV_TPS65910
427 tristate "TI TPS65910 RTC driver"
428 depends on RTC_CLASS && MFD_TPS65910
430 If you say yes here you get support for the RTC on the
433 This driver can also be built as a module. If so, the module
434 will be called rtc-tps65910.
436 config RTC_DRV_TPS80031
437 tristate "TI TPS80031/TPS80032 RTC driver"
438 depends on MFD_TPS80031
440 TI Power Management IC TPS80031 supports RTC functionality
441 along with alarm. This driver supports the RTC driver for
442 the TPS80031 RTC module.
444 config RTC_DRV_RC5T583
445 tristate "RICOH 5T583 RTC driver"
446 depends on MFD_RC5T583
448 If you say yes here you get support for the RTC on the
451 This driver can also be built as a module. If so, the module
452 will be called rtc-rc5t583.
454 config RTC_DRV_S35390A
455 tristate "Seiko Instruments S-35390A"
458 If you say yes here you will get support for the Seiko
459 Instruments S-35390A.
461 This driver can also be built as a module. If so the module
462 will be called rtc-s35390a.
464 config RTC_DRV_FM3130
465 tristate "Ramtron FM3130"
467 If you say Y here you will get support for the
468 Ramtron FM3130 RTC chips.
469 Ramtron FM3130 is a chip with two separate devices inside,
470 RTC clock and FRAM. This driver provides only RTC functionality.
472 This driver can also be built as a module. If so the module
473 will be called rtc-fm3130.
475 config RTC_DRV_RX8581
476 tristate "Epson RX-8581"
478 If you say yes here you will get support for the Epson RX-8581.
480 This driver can also be built as a module. If so the module
481 will be called rtc-rx8581.
483 config RTC_DRV_RX8025
484 tristate "Epson RX-8025SA/NB"
486 If you say yes here you get support for the Epson
487 RX-8025SA/NB RTC chips.
489 This driver can also be built as a module. If so, the module
490 will be called rtc-rx8025.
492 config RTC_DRV_EM3027
493 tristate "EM Microelectronic EM3027"
495 If you say yes here you get support for the EM
496 Microelectronic EM3027 RTC chips.
498 This driver can also be built as a module. If so, the module
499 will be called rtc-em3027.
501 config RTC_DRV_RV3029C2
502 tristate "Micro Crystal RTC"
504 If you say yes here you get support for the Micro Crystal
507 This driver can also be built as a module. If so, the module
508 will be called rtc-rv3029c2.
511 tristate "Samsung S5M series"
512 depends on MFD_SEC_CORE
514 If you say yes here you will get support for the
515 RTC of Samsung S5M PMIC series.
517 This driver can also be built as a module. If so, the module
518 will be called rtc-s5m.
522 comment "SPI RTC drivers"
526 config RTC_DRV_M41T93
529 If you say yes here you will get support for the
530 ST M41T93 SPI RTC chip.
532 This driver can also be built as a module. If so, the module
533 will be called rtc-m41t93.
535 config RTC_DRV_M41T94
538 If you say yes here you will get support for the
539 ST M41T94 SPI RTC chip.
541 This driver can also be built as a module. If so, the module
542 will be called rtc-m41t94.
544 config RTC_DRV_DS1305
545 tristate "Dallas/Maxim DS1305/DS1306"
547 Select this driver to get support for the Dallas/Maxim DS1305
548 and DS1306 real time clock chips. These support a trickle
549 charger, alarms, and NVRAM in addition to the clock.
551 This driver can also be built as a module. If so, the module
552 will be called rtc-ds1305.
554 config RTC_DRV_DS1390
555 tristate "Dallas/Maxim DS1390/93/94"
557 If you say yes here you get support for the
558 Dallas/Maxim DS1390/93/94 chips.
560 This driver only supports the RTC feature, and not other chip
561 features such as alarms and trickle charging.
563 This driver can also be built as a module. If so, the module
564 will be called rtc-ds1390.
566 config RTC_DRV_MAX6902
567 tristate "Maxim MAX6902"
569 If you say yes here you will get support for the
570 Maxim MAX6902 SPI RTC chip.
572 This driver can also be built as a module. If so, the module
573 will be called rtc-max6902.
576 tristate "Epson RTC-9701JE"
578 If you say yes here you will get support for the
579 Epson RTC-9701JE SPI RTC chip.
581 This driver can also be built as a module. If so, the module
582 will be called rtc-r9701.
584 config RTC_DRV_RS5C348
585 tristate "Ricoh RS5C348A/B"
587 If you say yes here you get support for the
588 Ricoh RS5C348A and RS5C348B RTC chips.
590 This driver can also be built as a module. If so, the module
591 will be called rtc-rs5c348.
593 config RTC_DRV_DS3234
594 tristate "Maxim/Dallas DS3234"
596 If you say yes here you get support for the
597 Maxim/Dallas DS3234 SPI RTC chip.
599 This driver can also be built as a module. If so, the module
600 will be called rtc-ds3234.
602 config RTC_DRV_PCF2123
603 tristate "NXP PCF2123"
605 If you say yes here you get support for the NXP PCF2123
608 This driver can also be built as a module. If so, the module
609 will be called rtc-pcf2123.
611 config RTC_DRV_RX4581
612 tristate "Epson RX-4581"
614 If you say yes here you will get support for the Epson RX-4581.
616 This driver can also be built as a module. If so the module
617 will be called rtc-rx4581.
621 comment "Platform RTC drivers"
623 # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
624 # requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
625 # global rtc_lock ... it's not yet just another platform_device.
628 tristate "PC-style 'CMOS'"
629 depends on X86 || ARM || M32R || ATARI || PPC || MIPS || SPARC64
632 Say "yes" here to get direct support for the real time clock
633 found in every PC or ACPI-based system, and some other boards.
634 Specifically the original MC146818, compatibles like those in
635 PC south bridges, the DS12887 or M48T86, some multifunction
636 or LPC bus chips, and so on.
638 Your system will need to define the platform device used by
639 this driver, otherwise it won't be accessible. This means
640 you can safely enable this driver if you don't know whether
641 or not your board has this kind of hardware.
643 This driver can also be built as a module. If so, the module
644 will be called rtc-cmos.
647 bool "Alpha PC-style CMOS"
651 Direct support for the real-time clock found on every Alpha
652 system, specifically MC146818 compatibles. If in doubt, say Y.
655 tristate "Virtual RTC for Intel MID platforms"
656 depends on X86_INTEL_MID
657 default y if X86_INTEL_MID
660 Say "yes" here to get direct support for the real time clock
661 found on Moorestown platforms. The VRTC is a emulated RTC that
662 derives its clock source from a real RTC in the PMIC. The MC146818
663 style programming interface is mostly conserved, but any
664 updates are done via IPC calls to the system controller FW.
666 config RTC_DRV_DS1216
667 tristate "Dallas DS1216"
670 If you say yes here you get support for the Dallas DS1216 RTC chips.
672 config RTC_DRV_DS1286
673 tristate "Dallas DS1286"
675 If you say yes here you get support for the Dallas DS1286 RTC chips.
677 config RTC_DRV_DS1302
678 tristate "Dallas DS1302"
679 depends on SH_SECUREEDGE5410
681 If you say yes here you get support for the Dallas DS1302 RTC chips.
683 config RTC_DRV_DS1511
684 tristate "Dallas DS1511"
686 If you say yes here you get support for the
687 Dallas DS1511 timekeeping/watchdog chip.
689 This driver can also be built as a module. If so, the module
690 will be called rtc-ds1511.
692 config RTC_DRV_DS1553
693 tristate "Maxim/Dallas DS1553"
695 If you say yes here you get support for the
696 Maxim/Dallas DS1553 timekeeping chip.
698 This driver can also be built as a module. If so, the module
699 will be called rtc-ds1553.
701 config RTC_DRV_DS1742
702 tristate "Maxim/Dallas DS1742/1743"
704 If you say yes here you get support for the
705 Maxim/Dallas DS1742/1743 timekeeping chip.
707 This driver can also be built as a module. If so, the module
708 will be called rtc-ds1742.
710 config RTC_DRV_DA9052
711 tristate "Dialog DA9052/DA9053 RTC"
712 depends on PMIC_DA9052
714 Say y here to support the RTC driver for Dialog Semiconductor
715 DA9052-BC and DA9053-AA/Bx PMICs.
717 config RTC_DRV_DA9055
718 tristate "Dialog Semiconductor DA9055 RTC"
719 depends on MFD_DA9055
721 If you say yes here you will get support for the
722 RTC of the Dialog DA9055 PMIC.
724 This driver can also be built as a module. If so, the module
725 will be called rtc-da9055
731 If you say yes here you will get support for the EFI
734 This driver can also be built as a module. If so, the module
735 will be called rtc-efi.
737 config RTC_DRV_STK17TA8
738 tristate "Simtek STK17TA8"
740 If you say yes here you get support for the
741 Simtek STK17TA8 timekeeping chip.
743 This driver can also be built as a module. If so, the module
744 will be called rtc-stk17ta8.
746 config RTC_DRV_M48T86
747 tristate "ST M48T86/Dallas DS12887"
749 If you say Y here you will get support for the
750 ST M48T86 and Dallas DS12887 RTC chips.
752 This driver can also be built as a module. If so, the module
753 will be called rtc-m48t86.
755 config RTC_DRV_M48T35
758 If you say Y here you will get support for the
761 This driver can also be built as a module, if so, the module
762 will be called "rtc-m48t35".
764 config RTC_DRV_M48T59
765 tristate "ST M48T59/M48T08/M48T02"
767 If you say Y here you will get support for the
768 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
770 These chips are usually found in Sun SPARC and UltraSPARC
773 This driver can also be built as a module, if so, the module
774 will be called "rtc-m48t59".
776 config RTC_DRV_MSM6242
777 tristate "Oki MSM6242"
779 If you say yes here you get support for the Oki MSM6242
780 timekeeping chip. It is used in some Amiga models (e.g. A2000).
782 This driver can also be built as a module. If so, the module
783 will be called rtc-msm6242.
785 config RTC_DRV_BQ4802
788 If you say Y here you will get support for the TI
791 This driver can also be built as a module. If so, the module
792 will be called rtc-bq4802.
794 config RTC_DRV_RP5C01
795 tristate "Ricoh RP5C01"
797 If you say yes here you get support for the Ricoh RP5C01
798 timekeeping chip. It is used in some Amiga models (e.g. A3000
801 This driver can also be built as a module. If so, the module
802 will be called rtc-rp5c01.
805 tristate "EM Microelectronic V3020"
807 If you say yes here you will get support for the
808 EM Microelectronic v3020 RTC chip.
810 This driver can also be built as a module. If so, the module
811 will be called rtc-v3020.
813 config RTC_DRV_DS2404
814 tristate "Dallas DS2404"
816 If you say yes here you get support for the
817 Dallas DS2404 RTC chip.
819 This driver can also be built as a module. If so, the module
820 will be called rtc-ds2404.
822 config RTC_DRV_WM831X
823 tristate "Wolfson Microelectronics WM831x RTC"
824 depends on MFD_WM831X
826 If you say yes here you will get support for the RTC subsystem
827 of the Wolfson Microelectronics WM831X series PMICs.
829 This driver can also be built as a module. If so, the module
830 will be called "rtc-wm831x".
832 config RTC_DRV_WM8350
833 tristate "Wolfson Microelectronics WM8350 RTC"
834 depends on MFD_WM8350
836 If you say yes here you will get support for the RTC subsystem
837 of the Wolfson Microelectronics WM8350.
839 This driver can also be built as a module. If so, the module
840 will be called "rtc-wm8350".
843 tristate "SPEAR ST RTC"
844 depends on PLAT_SPEAR
847 If you say Y here you will get support for the RTC found on
850 config RTC_DRV_PCF50633
851 depends on MFD_PCF50633
852 tristate "NXP PCF50633 RTC"
854 If you say yes here you get support for the RTC subsystem of the
855 NXP PCF50633 used in embedded systems.
857 config RTC_DRV_AB3100
858 tristate "ST-Ericsson AB3100 RTC"
859 depends on AB3100_CORE
860 default y if AB3100_CORE
862 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
863 support. This chip contains a battery- and capacitor-backed RTC.
865 config RTC_DRV_AB8500
866 tristate "ST-Ericsson AB8500 RTC"
867 depends on AB8500_CORE
869 select RTC_INTF_DEV_UIE_EMUL
871 Select this to enable the ST-Ericsson AB8500 power management IC RTC
872 support. This chip contains a battery- and capacitor-backed RTC.
874 config RTC_DRV_NUC900
875 tristate "NUC910/NUC920 RTC driver"
876 depends on ARCH_W90X900
878 If you say yes here you get support for the RTC subsystem of the
879 NUC910/NUC920 used in embedded systems.
881 comment "on-CPU RTC drivers"
883 config RTC_DRV_DAVINCI
884 tristate "TI DaVinci RTC"
885 depends on ARCH_DAVINCI_DM365
887 If you say yes here you get support for the RTC on the
888 DaVinci platforms (DM365).
890 This driver can also be built as a module. If so, the module
891 will be called rtc-davinci.
894 tristate "Freescale IMX DryIce Real Time Clock"
897 Support for Freescale IMX DryIce RTC
899 This driver can also be built as a module, if so, the module
900 will be called "rtc-imxdi".
904 depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX || SOC_AM33XX
906 Say "yes" here to support the on chip real time clock
907 present on TI OMAP1, AM33xx and DA8xx/OMAP-L13x.
909 This driver can also be built as a module, if so, module
910 will be called rtc-omap.
915 This will include RTC support for Samsung SoCs. If
916 you want to include RTC support for any machine, kindly
917 select this in the respective mach-XXXX/Kconfig file.
920 tristate "Samsung S3C series SoC RTC"
921 depends on ARCH_S3C64XX || HAVE_S3C_RTC
923 RTC (Realtime Clock) driver for the clock inbuilt into the
924 Samsung S3C24XX series of SoCs. This can provide periodic
925 interrupt rates from 1Hz to 64Hz for user programs, and
928 The driver currently supports the common features on all the
929 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
932 This driver can also be build as a module. If so, the module
933 will be called rtc-s3c.
935 config RTC_DRV_EP93XX
936 tristate "Cirrus Logic EP93XX"
937 depends on ARCH_EP93XX
939 If you say yes here you get support for the
940 RTC embedded in the Cirrus Logic EP93XX processors.
942 This driver can also be built as a module. If so, the module
943 will be called rtc-ep93xx.
945 config RTC_DRV_SA1100
946 tristate "SA11x0/PXA2xx/PXA910"
947 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
949 If you say Y here you will get access to the real time clock
950 built into your SA11x0 or PXA2xx CPU.
952 To compile this driver as a module, choose M here: the
953 module will be called rtc-sa1100.
956 tristate "SuperH On-Chip RTC"
957 depends on SUPERH && HAVE_CLK
959 Say Y here to enable support for the on-chip RTC found in
960 most SuperH processors.
962 To compile this driver as a module, choose M here: the
963 module will be called rtc-sh.
965 config RTC_DRV_VR41XX
966 tristate "NEC VR41XX"
967 depends on CPU_VR41XX
969 If you say Y here you will get access to the real time clock
970 built into your NEC VR41XX CPU.
972 To compile this driver as a module, choose M here: the
973 module will be called rtc-vr41xx.
976 tristate "ARM AMBA PL030 RTC"
979 If you say Y here you will get access to ARM AMBA
980 PrimeCell PL030 RTC found on certain ARM SOCs.
982 To compile this driver as a module, choose M here: the
983 module will be called rtc-pl030.
986 tristate "ARM AMBA PL031 RTC"
989 If you say Y here you will get access to ARM AMBA
990 PrimeCell PL031 RTC found on certain ARM SOCs.
992 To compile this driver as a module, choose M here: the
993 module will be called rtc-pl031.
995 config RTC_DRV_AT32AP700X
996 tristate "AT32AP700X series RTC"
997 depends on PLATFORM_AT32AP
999 Driver for the internal RTC (Realtime Clock) on Atmel AVR32
1000 AT32AP700x family processors.
1002 config RTC_DRV_AT91RM9200
1003 tristate "AT91RM9200 or some AT91SAM9 RTC"
1004 depends on ARCH_AT91
1006 Driver for the internal RTC (Realtime Clock) module found on
1007 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
1008 this is powered by the backup power supply.
1010 config RTC_DRV_AT91SAM9
1011 tristate "AT91SAM9x/AT91CAP9 RTT as RTC"
1012 depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
1014 RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
1015 (Real Time Timer). These timers are powered by the backup power
1016 supply (such as a small coin cell battery), but do not need to
1019 (On AT91SAM9rl and AT91SAM9G45 chips you probably want to use the
1020 dedicated RTC module and leave the RTT available for other uses.)
1022 config RTC_DRV_AT91SAM9_RTT
1026 prompt "RTT module Number" if ARCH_AT91SAM9263
1027 depends on RTC_DRV_AT91SAM9
1029 More than one RTT module is available. You can choose which
1030 one will be used as an RTC. The default of zero is normally
1031 OK to use, though some systems use that for non-RTC purposes.
1033 config RTC_DRV_AT91SAM9_GPBR
1035 range 0 3 if !ARCH_AT91SAM9263
1036 range 0 15 if ARCH_AT91SAM9263
1038 prompt "Backup Register Number"
1039 depends on RTC_DRV_AT91SAM9
1041 The RTC driver needs to use one of the General Purpose Backup
1042 Registers (GPBRs) as well as the RTT. You can choose which one
1043 will be used. The default of zero is normally OK to use, but
1044 on some systems other software needs to use that register.
1046 config RTC_DRV_AU1XXX
1047 tristate "Au1xxx Counter0 RTC support"
1048 depends on MIPS_ALCHEMY
1050 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1051 counter) to be used as a RTC.
1053 This driver can also be built as a module. If so, the module
1054 will be called rtc-au1xxx.
1057 tristate "Blackfin On-Chip RTC"
1058 depends on BLACKFIN && !BF561
1060 If you say yes here you will get support for the
1061 Blackfin On-Chip Real Time Clock.
1063 This driver can also be built as a module. If so, the module
1064 will be called rtc-bfin.
1066 config RTC_DRV_RS5C313
1067 tristate "Ricoh RS5C313"
1068 depends on SH_LANDISK
1070 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1072 config RTC_DRV_GENERIC
1073 tristate "Generic RTC support"
1074 # Please consider writing a new RTC driver instead of using the generic
1076 depends on PARISC || M68K || PPC || SUPERH32
1078 Say Y or M here to enable RTC support on systems using the generic
1079 RTC abstraction. If you do not know what you are doing, you should
1083 tristate "PXA27x/PXA3xx"
1086 If you say Y here you will get access to the real time clock
1087 built into your PXA27x or PXA3xx CPU.
1089 This RTC driver uses PXA RTC registers available since pxa27x
1090 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1092 config RTC_DRV_VT8500
1093 tristate "VIA/WonderMedia 85xx SoC RTC"
1094 depends on ARCH_VT8500
1096 If you say Y here you will get access to the real time clock
1097 built into your VIA VT8500 SoC or its relatives.
1100 config RTC_DRV_SUN4V
1101 bool "SUN4V Hypervisor RTC"
1104 If you say Y here you will get support for the Hypervisor
1105 based RTC on SUN4V systems.
1107 config RTC_DRV_STARFIRE
1111 If you say Y here you will get support for the RTC found on
1114 config RTC_DRV_TX4939
1115 tristate "TX4939 SoC"
1116 depends on SOC_TX4939
1118 Driver for the internal RTC (Realtime Clock) module found on
1122 tristate "Marvell SoC RTC"
1123 depends on ARCH_KIRKWOOD || ARCH_DOVE || ARCH_MVEBU
1125 If you say yes here you will get support for the in-chip RTC
1126 that can be found in some of Marvell's SoC devices, such as
1127 the Kirkwood 88F6281 and 88F6192.
1129 This driver can also be built as a module. If so, the module
1130 will be called rtc-mv.
1136 If you say yes here you will get support for the RTC on PS3.
1138 This driver can also be built as a module. If so, the module
1139 will be called rtc-ps3.
1141 config RTC_DRV_COH901331
1142 tristate "ST-Ericsson COH 901 331 RTC"
1143 depends on ARCH_U300
1145 If you say Y here you will get access to ST-Ericsson
1146 COH 901 331 RTC clock found in some ST-Ericsson Mobile
1149 This driver can also be built as a module. If so, the module
1150 will be called "rtc-coh901331".
1154 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1157 If you say yes here you will get support for the onboard
1158 STMP3xxx/i.MX23/i.MX28 RTC.
1160 This driver can also be built as a module. If so, the module
1161 will be called rtc-stmp3xxx.
1167 If you say Y here you will get support for the RTC found on
1168 the PCAP2 ASIC used on some Motorola phones.
1170 config RTC_DRV_MC13XXX
1171 depends on MFD_MC13XXX
1172 tristate "Freescale MC13xxx RTC"
1174 This enables support for the RTCs found on Freescale's PMICs
1175 MC13783 and MC13892.
1177 config RTC_DRV_MPC5121
1178 tristate "Freescale MPC5121 built-in RTC"
1179 depends on PPC_MPC512x || PPC_MPC52xx
1181 If you say yes here you will get support for the
1182 built-in RTC on MPC5121 or on MPC5200.
1184 This driver can also be built as a module. If so, the module
1185 will be called rtc-mpc5121.
1187 config RTC_DRV_JZ4740
1188 tristate "Ingenic JZ4740 SoC"
1189 depends on MACH_JZ4740
1191 If you say yes here you get support for the Ingenic JZ4740 SoC RTC
1194 This driver can also be buillt as a module. If so, the module
1195 will be called rtc-jz4740.
1197 config RTC_DRV_LPC32XX
1198 depends on ARCH_LPC32XX
1199 tristate "NXP LPC32XX RTC"
1201 This enables support for the NXP RTC in the LPC32XX
1203 This driver can also be buillt as a module. If so, the module
1204 will be called rtc-lpc32xx.
1206 config RTC_DRV_PM8XXX
1207 tristate "Qualcomm PMIC8XXX RTC"
1208 depends on MFD_PM8XXX
1210 If you say yes here you get support for the
1211 Qualcomm PMIC8XXX RTC.
1213 To compile this driver as a module, choose M here: the
1214 module will be called rtc-pm8xxx.
1216 config RTC_DRV_TEGRA
1217 tristate "NVIDIA Tegra Internal RTC driver"
1218 depends on ARCH_TEGRA
1220 If you say yes here you get support for the
1221 Tegra 200 series internal RTC module.
1223 This drive can also be built as a module. If so, the module
1224 will be called rtc-tegra.
1227 tristate "Tilera hypervisor RTC support"
1230 Enable support for the Linux driver side of the Tilera
1231 hypervisor's real-time clock interface.
1234 tristate "PKUnity v3 RTC support"
1235 depends on ARCH_PUV3
1237 This enables support for the RTC in the PKUnity-v3 SoCs.
1239 This drive can also be built as a module. If so, the module
1240 will be called rtc-puv3.
1242 config RTC_DRV_LOONGSON1
1243 tristate "loongson1 RTC support"
1244 depends on MACH_LOONGSON1
1246 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1247 counter) to be used as a RTC.
1249 This driver can also be built as a module. If so, the module
1250 will be called rtc-ls1x.
1253 tristate "Freescale MXC Real Time Clock"
1256 If you say yes here you get support for the Freescale MXC
1259 This driver can also be built as a module, if so, the module
1260 will be called "rtc-mxc".
1263 tristate "Freescale SNVS RTC support"
1264 depends on HAS_IOMEM
1267 If you say yes here you get support for the Freescale SNVS
1268 Low Power (LP) RTC module.
1270 This driver can also be built as a module, if so, the module
1271 will be called "rtc-snvs".
1273 config RTC_DRV_SIRFSOC
1274 tristate "SiRFSOC RTC"
1275 depends on ARCH_SIRF
1277 Say "yes" here to support the real time clock on SiRF SOC chips.
1278 This driver can also be built as a module called rtc-sirfsoc.
1280 config RTC_DRV_MOXART
1281 tristate "MOXA ART RTC"
1283 If you say yes here you get support for the MOXA ART
1286 This driver can also be built as a module. If so, the module
1287 will be called rtc-moxart
1289 comment "HID Sensor RTC drivers"
1291 config RTC_DRV_HID_SENSOR_TIME
1292 tristate "HID Sensor Time"
1295 select HID_SENSOR_HUB
1296 select HID_SENSOR_IIO_COMMON
1298 Say yes here to build support for the HID Sensors of type Time.
1299 This drivers makes such sensors available as RTCs.
1301 If this driver is compiled as a module, it will be named
1302 rtc-hid-sensor-time.