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_DS1307
157 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
159 If you say yes here you get support for various compatible RTC
160 chips (often with battery backup) connected with I2C. This driver
161 should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
162 EPSON RX-8025 and probably other chips. In some cases the RTC
163 must already have been initialized (by manufacturing or a
166 The first seven registers on these chips hold an RTC, and other
167 registers may add features such as NVRAM, a trickle charger for
168 the RTC/NVRAM backup power, and alarms. NVRAM is visible in
169 sysfs, but other chip features may not be available.
171 This driver can also be built as a module. If so, the module
172 will be called rtc-ds1307.
174 config RTC_DRV_DS1374
175 tristate "Dallas/Maxim DS1374"
178 If you say yes here you get support for Dallas Semiconductor
179 DS1374 real-time clock chips. If an interrupt is associated
180 with the device, the alarm functionality is supported.
182 This driver can also be built as a module. If so, the module
183 will be called rtc-ds1374.
185 config RTC_DRV_DS1672
186 tristate "Dallas/Maxim DS1672"
188 If you say yes here you get support for the
189 Dallas/Maxim DS1672 timekeeping chip.
191 This driver can also be built as a module. If so, the module
192 will be called rtc-ds1672.
194 config RTC_DRV_DS3232
195 tristate "Dallas/Maxim DS3232"
198 If you say yes here you get support for Dallas Semiconductor
199 DS3232 real-time clock chips. If an interrupt is associated
200 with the device, the alarm functionality is supported.
202 This driver can also be built as a module. If so, the module
203 will be called rtc-ds3232.
205 config RTC_DRV_LP8788
206 tristate "TI LP8788 RTC driver"
207 depends on MFD_LP8788
209 Say Y to enable support for the LP8788 RTC/ALARM driver.
211 config RTC_DRV_MAX6900
212 tristate "Maxim MAX6900"
214 If you say yes here you will get support for the
215 Maxim MAX6900 I2C RTC chip.
217 This driver can also be built as a module. If so, the module
218 will be called rtc-max6900.
220 config RTC_DRV_MAX8907
221 tristate "Maxim MAX8907"
222 depends on MFD_MAX8907
224 If you say yes here you will get support for the
225 RTC of Maxim MAX8907 PMIC.
227 This driver can also be built as a module. If so, the module
228 will be called rtc-max8907.
230 config RTC_DRV_MAX8925
231 tristate "Maxim MAX8925"
232 depends on MFD_MAX8925
234 If you say yes here you will get support for the
235 RTC of Maxim MAX8925 PMIC.
237 This driver can also be built as a module. If so, the module
238 will be called rtc-max8925.
240 config RTC_DRV_MAX8998
241 tristate "Maxim MAX8998"
242 depends on MFD_MAX8998
244 If you say yes here you will get support for the
245 RTC of Maxim MAX8998 PMIC.
247 This driver can also be built as a module. If so, the module
248 will be called rtc-max8998.
250 config RTC_DRV_MAX8997
251 tristate "Maxim MAX8997"
252 depends on MFD_MAX8997
254 If you say yes here you will get support for the
255 RTC of Maxim MAX8997 PMIC.
257 This driver can also be built as a module. If so, the module
258 will be called rtc-max8997.
260 config RTC_DRV_MAX77686
261 tristate "Maxim MAX77686"
262 depends on MFD_MAX77686
264 If you say yes here you will get support for the
265 RTC of Maxim MAX77686 PMIC.
267 This driver can also be built as a module. If so, the module
268 will be called rtc-max77686.
270 config RTC_DRV_RS5C372
271 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
273 If you say yes here you get support for the
274 Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
276 This driver can also be built as a module. If so, the module
277 will be called rtc-rs5c372.
279 config RTC_DRV_ISL1208
280 tristate "Intersil ISL1208"
282 If you say yes here you get support for the
283 Intersil ISL1208 RTC chip.
285 This driver can also be built as a module. If so, the module
286 will be called rtc-isl1208.
288 config RTC_DRV_ISL12022
289 tristate "Intersil ISL12022"
291 If you say yes here you get support for the
292 Intersil ISL12022 RTC chip.
294 This driver can also be built as a module. If so, the module
295 will be called rtc-isl12022.
298 tristate "Xicor/Intersil X1205"
300 If you say yes here you get support for the
301 Xicor/Intersil X1205 RTC chip.
303 This driver can also be built as a module. If so, the module
304 will be called rtc-x1205.
306 config RTC_DRV_PALMAS
307 tristate "TI Palmas RTC driver"
308 depends on MFD_PALMAS
310 If you say yes here you get support for the RTC of TI PALMA series PMIC
313 This driver can also be built as a module. If so, the module
314 will be called rtc-palma.
316 config RTC_DRV_PCF8523
317 tristate "NXP PCF8523"
319 If you say yes here you get support for the NXP PCF8523 RTC
322 This driver can also be built as a module. If so, the module
323 will be called rtc-pcf8523.
325 config RTC_DRV_PCF8563
326 tristate "Philips PCF8563/Epson RTC8564"
328 If you say yes here you get support for the
329 Philips PCF8563 RTC chip. The Epson RTC8564
332 This driver can also be built as a module. If so, the module
333 will be called rtc-pcf8563.
335 config RTC_DRV_PCF8583
336 tristate "Philips PCF8583"
338 If you say yes here you get support for the Philips PCF8583
339 RTC chip found on Acorn RiscPCs. This driver supports the
340 platform specific method of retrieving the current year from
341 the RTC's SRAM. It will work on other platforms with the same
342 chip, but the year will probably have to be tweaked.
344 This driver can also be built as a module. If so, the module
345 will be called rtc-pcf8583.
347 config RTC_DRV_M41T80
348 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87"
350 If you say Y here you will get support for the ST M41T60
351 and M41T80 RTC chips series. Currently, the following chips are
352 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
353 M41ST85, and M41ST87.
355 This driver can also be built as a module. If so, the module
356 will be called rtc-m41t80.
358 config RTC_DRV_M41T80_WDT
359 bool "ST M41T65/M41T80 series RTC watchdog timer"
360 depends on RTC_DRV_M41T80
362 If you say Y here you will get support for the
363 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
366 tristate "TI BQ32000"
368 If you say Y here you will get support for the TI
369 BQ32000 I2C RTC chip.
371 This driver can also be built as a module. If so, the module
372 will be called rtc-bq32k.
374 config RTC_DRV_DM355EVM
375 tristate "TI DaVinci DM355 EVM RTC"
376 depends on MFD_DM355EVM_MSP
378 Supports the RTC firmware in the MSP430 on the DM355 EVM.
380 config RTC_DRV_TWL92330
381 boolean "TI TWL92330/Menelaus"
384 If you say yes here you get support for the RTC on the
385 TWL92330 "Menelaus" power management chip, used with OMAP2
386 platforms. The support is integrated with the rest of
387 the Menelaus driver; it's not separate module.
389 config RTC_DRV_TWL4030
390 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
391 depends on TWL4030_CORE
393 If you say yes here you get support for the RTC on the
394 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
396 This driver can also be built as a module. If so, the module
397 will be called rtc-twl.
399 config RTC_DRV_TPS6586X
400 tristate "TI TPS6586X RTC driver"
401 depends on MFD_TPS6586X
403 TI Power Management IC TPS6586X supports RTC functionality
404 along with alarm. This driver supports the RTC driver for
405 the TPS6586X RTC module.
407 config RTC_DRV_TPS65910
408 tristate "TI TPS65910 RTC driver"
409 depends on RTC_CLASS && MFD_TPS65910
411 If you say yes here you get support for the RTC on the
414 This driver can also be built as a module. If so, the module
415 will be called rtc-tps65910.
417 config RTC_DRV_TPS80031
418 tristate "TI TPS80031/TPS80032 RTC driver"
419 depends on MFD_TPS80031
421 TI Power Management IC TPS80031 supports RTC functionality
422 along with alarm. This driver supports the RTC driver for
423 the TPS80031 RTC module.
425 config RTC_DRV_RC5T583
426 tristate "RICOH 5T583 RTC driver"
427 depends on MFD_RC5T583
429 If you say yes here you get support for the RTC on the
432 This driver can also be built as a module. If so, the module
433 will be called rtc-rc5t583.
435 config RTC_DRV_S35390A
436 tristate "Seiko Instruments S-35390A"
439 If you say yes here you will get support for the Seiko
440 Instruments S-35390A.
442 This driver can also be built as a module. If so the module
443 will be called rtc-s35390a.
445 config RTC_DRV_FM3130
446 tristate "Ramtron FM3130"
448 If you say Y here you will get support for the
449 Ramtron FM3130 RTC chips.
450 Ramtron FM3130 is a chip with two separate devices inside,
451 RTC clock and FRAM. This driver provides only RTC functionality.
453 This driver can also be built as a module. If so the module
454 will be called rtc-fm3130.
456 config RTC_DRV_RX8581
457 tristate "Epson RX-8581"
459 If you say yes here you will get support for the Epson RX-8581.
461 This driver can also be built as a module. If so the module
462 will be called rtc-rx8581.
464 config RTC_DRV_RX8025
465 tristate "Epson RX-8025SA/NB"
467 If you say yes here you get support for the Epson
468 RX-8025SA/NB RTC chips.
470 This driver can also be built as a module. If so, the module
471 will be called rtc-rx8025.
473 config RTC_DRV_EM3027
474 tristate "EM Microelectronic EM3027"
476 If you say yes here you get support for the EM
477 Microelectronic EM3027 RTC chips.
479 This driver can also be built as a module. If so, the module
480 will be called rtc-em3027.
482 config RTC_DRV_RV3029C2
483 tristate "Micro Crystal RTC"
485 If you say yes here you get support for the Micro Crystal
488 This driver can also be built as a module. If so, the module
489 will be called rtc-rv3029c2.
493 comment "SPI RTC drivers"
497 config RTC_DRV_M41T93
500 If you say yes here you will get support for the
501 ST M41T93 SPI RTC chip.
503 This driver can also be built as a module. If so, the module
504 will be called rtc-m41t93.
506 config RTC_DRV_M41T94
509 If you say yes here you will get support for the
510 ST M41T94 SPI RTC chip.
512 This driver can also be built as a module. If so, the module
513 will be called rtc-m41t94.
515 config RTC_DRV_DS1305
516 tristate "Dallas/Maxim DS1305/DS1306"
518 Select this driver to get support for the Dallas/Maxim DS1305
519 and DS1306 real time clock chips. These support a trickle
520 charger, alarms, and NVRAM in addition to the clock.
522 This driver can also be built as a module. If so, the module
523 will be called rtc-ds1305.
525 config RTC_DRV_DS1390
526 tristate "Dallas/Maxim DS1390/93/94"
528 If you say yes here you get support for the
529 Dallas/Maxim DS1390/93/94 chips.
531 This driver only supports the RTC feature, and not other chip
532 features such as alarms and trickle charging.
534 This driver can also be built as a module. If so, the module
535 will be called rtc-ds1390.
537 config RTC_DRV_MAX6902
538 tristate "Maxim MAX6902"
540 If you say yes here you will get support for the
541 Maxim MAX6902 SPI RTC chip.
543 This driver can also be built as a module. If so, the module
544 will be called rtc-max6902.
547 tristate "Epson RTC-9701JE"
549 If you say yes here you will get support for the
550 Epson RTC-9701JE SPI RTC chip.
552 This driver can also be built as a module. If so, the module
553 will be called rtc-r9701.
555 config RTC_DRV_RS5C348
556 tristate "Ricoh RS5C348A/B"
558 If you say yes here you get support for the
559 Ricoh RS5C348A and RS5C348B RTC chips.
561 This driver can also be built as a module. If so, the module
562 will be called rtc-rs5c348.
564 config RTC_DRV_DS3234
565 tristate "Maxim/Dallas DS3234"
567 If you say yes here you get support for the
568 Maxim/Dallas DS3234 SPI RTC chip.
570 This driver can also be built as a module. If so, the module
571 will be called rtc-ds3234.
573 config RTC_DRV_PCF2123
574 tristate "NXP PCF2123"
576 If you say yes here you get support for the NXP PCF2123
579 This driver can also be built as a module. If so, the module
580 will be called rtc-pcf2123.
582 config RTC_DRV_RX4581
583 tristate "Epson RX-4581"
585 If you say yes here you will get support for the Epson RX-4581.
587 This driver can also be built as a module. If so the module
588 will be called rtc-rx4581.
592 comment "Platform RTC drivers"
594 # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
595 # requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
596 # global rtc_lock ... it's not yet just another platform_device.
599 tristate "PC-style 'CMOS'"
600 depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS || SPARC64
603 Say "yes" here to get direct support for the real time clock
604 found in every PC or ACPI-based system, and some other boards.
605 Specifically the original MC146818, compatibles like those in
606 PC south bridges, the DS12887 or M48T86, some multifunction
607 or LPC bus chips, and so on.
609 Your system will need to define the platform device used by
610 this driver, otherwise it won't be accessible. This means
611 you can safely enable this driver if you don't know whether
612 or not your board has this kind of hardware.
614 This driver can also be built as a module. If so, the module
615 will be called rtc-cmos.
618 tristate "Virtual RTC for Intel MID platforms"
619 depends on X86_INTEL_MID
620 default y if X86_INTEL_MID
623 Say "yes" here to get direct support for the real time clock
624 found on Moorestown platforms. The VRTC is a emulated RTC that
625 derives its clock source from a real RTC in the PMIC. The MC146818
626 style programming interface is mostly conserved, but any
627 updates are done via IPC calls to the system controller FW.
629 config RTC_DRV_DS1216
630 tristate "Dallas DS1216"
633 If you say yes here you get support for the Dallas DS1216 RTC chips.
635 config RTC_DRV_DS1286
636 tristate "Dallas DS1286"
638 If you say yes here you get support for the Dallas DS1286 RTC chips.
640 config RTC_DRV_DS1302
641 tristate "Dallas DS1302"
642 depends on SH_SECUREEDGE5410
644 If you say yes here you get support for the Dallas DS1302 RTC chips.
646 config RTC_DRV_DS1511
647 tristate "Dallas DS1511"
649 If you say yes here you get support for the
650 Dallas DS1511 timekeeping/watchdog chip.
652 This driver can also be built as a module. If so, the module
653 will be called rtc-ds1511.
655 config RTC_DRV_DS1553
656 tristate "Maxim/Dallas DS1553"
658 If you say yes here you get support for the
659 Maxim/Dallas DS1553 timekeeping chip.
661 This driver can also be built as a module. If so, the module
662 will be called rtc-ds1553.
664 config RTC_DRV_DS1742
665 tristate "Maxim/Dallas DS1742/1743"
667 If you say yes here you get support for the
668 Maxim/Dallas DS1742/1743 timekeeping chip.
670 This driver can also be built as a module. If so, the module
671 will be called rtc-ds1742.
673 config RTC_DRV_DA9052
674 tristate "Dialog DA9052/DA9053 RTC"
675 depends on PMIC_DA9052
677 Say y here to support the RTC driver for Dialog Semiconductor
678 DA9052-BC and DA9053-AA/Bx PMICs.
680 config RTC_DRV_DA9055
681 tristate "Dialog Semiconductor DA9055 RTC"
682 depends on MFD_DA9055
684 If you say yes here you will get support for the
685 RTC of the Dialog DA9055 PMIC.
687 This driver can also be built as a module. If so, the module
688 will be called rtc-da9055
694 If you say yes here you will get support for the EFI
697 This driver can also be built as a module. If so, the module
698 will be called rtc-efi.
700 config RTC_DRV_STK17TA8
701 tristate "Simtek STK17TA8"
703 If you say yes here you get support for the
704 Simtek STK17TA8 timekeeping chip.
706 This driver can also be built as a module. If so, the module
707 will be called rtc-stk17ta8.
709 config RTC_DRV_M48T86
710 tristate "ST M48T86/Dallas DS12887"
712 If you say Y here you will get support for the
713 ST M48T86 and Dallas DS12887 RTC chips.
715 This driver can also be built as a module. If so, the module
716 will be called rtc-m48t86.
718 config RTC_DRV_M48T35
721 If you say Y here you will get support for the
724 This driver can also be built as a module, if so, the module
725 will be called "rtc-m48t35".
727 config RTC_DRV_M48T59
728 tristate "ST M48T59/M48T08/M48T02"
730 If you say Y here you will get support for the
731 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
733 These chips are usually found in Sun SPARC and UltraSPARC
736 This driver can also be built as a module, if so, the module
737 will be called "rtc-m48t59".
739 config RTC_DRV_MSM6242
740 tristate "Oki MSM6242"
742 If you say yes here you get support for the Oki MSM6242
743 timekeeping chip. It is used in some Amiga models (e.g. A2000).
745 This driver can also be built as a module. If so, the module
746 will be called rtc-msm6242.
748 config RTC_DRV_BQ4802
751 If you say Y here you will get support for the TI
754 This driver can also be built as a module. If so, the module
755 will be called rtc-bq4802.
757 config RTC_DRV_RP5C01
758 tristate "Ricoh RP5C01"
760 If you say yes here you get support for the Ricoh RP5C01
761 timekeeping chip. It is used in some Amiga models (e.g. A3000
764 This driver can also be built as a module. If so, the module
765 will be called rtc-rp5c01.
768 tristate "EM Microelectronic V3020"
770 If you say yes here you will get support for the
771 EM Microelectronic v3020 RTC chip.
773 This driver can also be built as a module. If so, the module
774 will be called rtc-v3020.
776 config RTC_DRV_DS2404
777 tristate "Dallas DS2404"
779 If you say yes here you get support for the
780 Dallas DS2404 RTC chip.
782 This driver can also be built as a module. If so, the module
783 will be called rtc-ds2404.
785 config RTC_DRV_WM831X
786 tristate "Wolfson Microelectronics WM831x RTC"
787 depends on MFD_WM831X
789 If you say yes here you will get support for the RTC subsystem
790 of the Wolfson Microelectronics WM831X series PMICs.
792 This driver can also be built as a module. If so, the module
793 will be called "rtc-wm831x".
795 config RTC_DRV_WM8350
796 tristate "Wolfson Microelectronics WM8350 RTC"
797 depends on MFD_WM8350
799 If you say yes here you will get support for the RTC subsystem
800 of the Wolfson Microelectronics WM8350.
802 This driver can also be built as a module. If so, the module
803 will be called "rtc-wm8350".
806 tristate "SPEAR ST RTC"
807 depends on PLAT_SPEAR
810 If you say Y here you will get support for the RTC found on
813 config RTC_DRV_PCF50633
814 depends on MFD_PCF50633
815 tristate "NXP PCF50633 RTC"
817 If you say yes here you get support for the RTC subsystem of the
818 NXP PCF50633 used in embedded systems.
820 config RTC_DRV_AB3100
821 tristate "ST-Ericsson AB3100 RTC"
822 depends on AB3100_CORE
823 default y if AB3100_CORE
825 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
826 support. This chip contains a battery- and capacitor-backed RTC.
828 config RTC_DRV_AB8500
829 tristate "ST-Ericsson AB8500 RTC"
830 depends on AB8500_CORE
832 select RTC_INTF_DEV_UIE_EMUL
834 Select this to enable the ST-Ericsson AB8500 power management IC RTC
835 support. This chip contains a battery- and capacitor-backed RTC.
837 config RTC_DRV_NUC900
838 tristate "NUC910/NUC920 RTC driver"
839 depends on ARCH_W90X900
841 If you say yes here you get support for the RTC subsystem of the
842 NUC910/NUC920 used in embedded systems.
844 comment "on-CPU RTC drivers"
846 config RTC_DRV_DAVINCI
847 tristate "TI DaVinci RTC"
848 depends on ARCH_DAVINCI_DM365
850 If you say yes here you get support for the RTC on the
851 DaVinci platforms (DM365).
853 This driver can also be built as a module. If so, the module
854 will be called rtc-davinci.
857 tristate "Freescale IMX DryIce Real Time Clock"
860 Support for Freescale IMX DryIce RTC
862 This driver can also be built as a module, if so, the module
863 will be called "rtc-imxdi".
867 depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX || SOC_AM33XX
869 Say "yes" here to support the on chip real time clock
870 present on TI OMAP1, AM33xx and DA8xx/OMAP-L13x.
872 This driver can also be built as a module, if so, module
873 will be called rtc-omap.
878 This will include RTC support for Samsung SoCs. If
879 you want to include RTC support for any machine, kindly
880 select this in the respective mach-XXXX/Kconfig file.
883 tristate "Samsung S3C series SoC RTC"
884 depends on ARCH_S3C64XX || HAVE_S3C_RTC
886 RTC (Realtime Clock) driver for the clock inbuilt into the
887 Samsung S3C24XX series of SoCs. This can provide periodic
888 interrupt rates from 1Hz to 64Hz for user programs, and
891 The driver currently supports the common features on all the
892 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
895 This driver can also be build as a module. If so, the module
896 will be called rtc-s3c.
898 config RTC_DRV_EP93XX
899 tristate "Cirrus Logic EP93XX"
900 depends on ARCH_EP93XX
902 If you say yes here you get support for the
903 RTC embedded in the Cirrus Logic EP93XX processors.
905 This driver can also be built as a module. If so, the module
906 will be called rtc-ep93xx.
908 config RTC_DRV_SA1100
909 tristate "SA11x0/PXA2xx/PXA910"
910 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
912 If you say Y here you will get access to the real time clock
913 built into your SA11x0 or PXA2xx CPU.
915 To compile this driver as a module, choose M here: the
916 module will be called rtc-sa1100.
919 tristate "SuperH On-Chip RTC"
920 depends on SUPERH && HAVE_CLK
922 Say Y here to enable support for the on-chip RTC found in
923 most SuperH processors.
925 To compile this driver as a module, choose M here: the
926 module will be called rtc-sh.
928 config RTC_DRV_VR41XX
929 tristate "NEC VR41XX"
930 depends on CPU_VR41XX
932 If you say Y here you will get access to the real time clock
933 built into your NEC VR41XX CPU.
935 To compile this driver as a module, choose M here: the
936 module will be called rtc-vr41xx.
939 tristate "ARM AMBA PL030 RTC"
942 If you say Y here you will get access to ARM AMBA
943 PrimeCell PL030 RTC found on certain ARM SOCs.
945 To compile this driver as a module, choose M here: the
946 module will be called rtc-pl030.
949 tristate "ARM AMBA PL031 RTC"
952 If you say Y here you will get access to ARM AMBA
953 PrimeCell PL031 RTC found on certain ARM SOCs.
955 To compile this driver as a module, choose M here: the
956 module will be called rtc-pl031.
958 config RTC_DRV_AT32AP700X
959 tristate "AT32AP700X series RTC"
960 depends on PLATFORM_AT32AP
962 Driver for the internal RTC (Realtime Clock) on Atmel AVR32
963 AT32AP700x family processors.
965 config RTC_DRV_AT91RM9200
966 tristate "AT91RM9200 or some AT91SAM9 RTC"
969 Driver for the internal RTC (Realtime Clock) module found on
970 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
971 this is powered by the backup power supply.
973 config RTC_DRV_AT91SAM9
974 tristate "AT91SAM9x/AT91CAP9 RTT as RTC"
975 depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
977 RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
978 (Real Time Timer). These timers are powered by the backup power
979 supply (such as a small coin cell battery), but do not need to
982 (On AT91SAM9rl and AT91SAM9G45 chips you probably want to use the
983 dedicated RTC module and leave the RTT available for other uses.)
985 config RTC_DRV_AT91SAM9_RTT
989 prompt "RTT module Number" if ARCH_AT91SAM9263
990 depends on RTC_DRV_AT91SAM9
992 More than one RTT module is available. You can choose which
993 one will be used as an RTC. The default of zero is normally
994 OK to use, though some systems use that for non-RTC purposes.
996 config RTC_DRV_AT91SAM9_GPBR
998 range 0 3 if !ARCH_AT91SAM9263
999 range 0 15 if ARCH_AT91SAM9263
1001 prompt "Backup Register Number"
1002 depends on RTC_DRV_AT91SAM9
1004 The RTC driver needs to use one of the General Purpose Backup
1005 Registers (GPBRs) as well as the RTT. You can choose which one
1006 will be used. The default of zero is normally OK to use, but
1007 on some systems other software needs to use that register.
1009 config RTC_DRV_AU1XXX
1010 tristate "Au1xxx Counter0 RTC support"
1011 depends on MIPS_ALCHEMY
1013 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1014 counter) to be used as a RTC.
1016 This driver can also be built as a module. If so, the module
1017 will be called rtc-au1xxx.
1020 tristate "Blackfin On-Chip RTC"
1021 depends on BLACKFIN && !BF561
1023 If you say yes here you will get support for the
1024 Blackfin On-Chip Real Time Clock.
1026 This driver can also be built as a module. If so, the module
1027 will be called rtc-bfin.
1029 config RTC_DRV_RS5C313
1030 tristate "Ricoh RS5C313"
1031 depends on SH_LANDISK
1033 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1035 config RTC_DRV_GENERIC
1036 tristate "Generic RTC support"
1037 # Please consider writing a new RTC driver instead of using the generic
1039 depends on PARISC || M68K || PPC || SUPERH32
1041 Say Y or M here to enable RTC support on systems using the generic
1042 RTC abstraction. If you do not know what you are doing, you should
1046 tristate "PXA27x/PXA3xx"
1049 If you say Y here you will get access to the real time clock
1050 built into your PXA27x or PXA3xx CPU.
1052 This RTC driver uses PXA RTC registers available since pxa27x
1053 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1055 config RTC_DRV_VT8500
1056 tristate "VIA/WonderMedia 85xx SoC RTC"
1057 depends on ARCH_VT8500
1059 If you say Y here you will get access to the real time clock
1060 built into your VIA VT8500 SoC or its relatives.
1063 config RTC_DRV_SUN4V
1064 bool "SUN4V Hypervisor RTC"
1067 If you say Y here you will get support for the Hypervisor
1068 based RTC on SUN4V systems.
1070 config RTC_DRV_STARFIRE
1074 If you say Y here you will get support for the RTC found on
1077 config RTC_DRV_TX4939
1078 tristate "TX4939 SoC"
1079 depends on SOC_TX4939
1081 Driver for the internal RTC (Realtime Clock) module found on
1085 tristate "Marvell SoC RTC"
1086 depends on ARCH_KIRKWOOD || ARCH_DOVE || ARCH_MVEBU
1088 If you say yes here you will get support for the in-chip RTC
1089 that can be found in some of Marvell's SoC devices, such as
1090 the Kirkwood 88F6281 and 88F6192.
1092 This driver can also be built as a module. If so, the module
1093 will be called rtc-mv.
1099 If you say yes here you will get support for the RTC on PS3.
1101 This driver can also be built as a module. If so, the module
1102 will be called rtc-ps3.
1104 config RTC_DRV_COH901331
1105 tristate "ST-Ericsson COH 901 331 RTC"
1106 depends on ARCH_U300
1108 If you say Y here you will get access to ST-Ericsson
1109 COH 901 331 RTC clock found in some ST-Ericsson Mobile
1112 This driver can also be built as a module. If so, the module
1113 will be called "rtc-coh901331".
1117 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1120 If you say yes here you will get support for the onboard
1121 STMP3xxx/i.MX23/i.MX28 RTC.
1123 This driver can also be built as a module. If so, the module
1124 will be called rtc-stmp3xxx.
1130 If you say Y here you will get support for the RTC found on
1131 the PCAP2 ASIC used on some Motorola phones.
1133 config RTC_DRV_MC13XXX
1134 depends on MFD_MC13XXX
1135 tristate "Freescale MC13xxx RTC"
1137 This enables support for the RTCs found on Freescale's PMICs
1138 MC13783 and MC13892.
1140 config RTC_DRV_MPC5121
1141 tristate "Freescale MPC5121 built-in RTC"
1142 depends on PPC_MPC512x || PPC_MPC52xx
1144 If you say yes here you will get support for the
1145 built-in RTC on MPC5121 or on MPC5200.
1147 This driver can also be built as a module. If so, the module
1148 will be called rtc-mpc5121.
1150 config RTC_DRV_JZ4740
1151 tristate "Ingenic JZ4740 SoC"
1152 depends on MACH_JZ4740
1154 If you say yes here you get support for the Ingenic JZ4740 SoC RTC
1157 This driver can also be buillt as a module. If so, the module
1158 will be called rtc-jz4740.
1160 config RTC_DRV_LPC32XX
1161 depends on ARCH_LPC32XX
1162 tristate "NXP LPC32XX RTC"
1164 This enables support for the NXP RTC in the LPC32XX
1166 This driver can also be buillt as a module. If so, the module
1167 will be called rtc-lpc32xx.
1169 config RTC_DRV_PM8XXX
1170 tristate "Qualcomm PMIC8XXX RTC"
1171 depends on MFD_PM8XXX
1173 If you say yes here you get support for the
1174 Qualcomm PMIC8XXX RTC.
1176 To compile this driver as a module, choose M here: the
1177 module will be called rtc-pm8xxx.
1179 config RTC_DRV_TEGRA
1180 tristate "NVIDIA Tegra Internal RTC driver"
1181 depends on ARCH_TEGRA
1183 If you say yes here you get support for the
1184 Tegra 200 series internal RTC module.
1186 This drive can also be built as a module. If so, the module
1187 will be called rtc-tegra.
1190 tristate "Tilera hypervisor RTC support"
1193 Enable support for the Linux driver side of the Tilera
1194 hypervisor's real-time clock interface.
1197 tristate "PKUnity v3 RTC support"
1198 depends on ARCH_PUV3
1200 This enables support for the RTC in the PKUnity-v3 SoCs.
1202 This drive can also be built as a module. If so, the module
1203 will be called rtc-puv3.
1205 config RTC_DRV_LOONGSON1
1206 tristate "loongson1 RTC support"
1207 depends on MACH_LOONGSON1
1209 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1210 counter) to be used as a RTC.
1212 This driver can also be built as a module. If so, the module
1213 will be called rtc-ls1x.
1216 tristate "Freescale MXC Real Time Clock"
1219 If you say yes here you get support for the Freescale MXC
1222 This driver can also be built as a module, if so, the module
1223 will be called "rtc-mxc".
1226 tristate "Freescale SNVS RTC support"
1227 depends on HAS_IOMEM
1230 If you say yes here you get support for the Freescale SNVS
1231 Low Power (LP) RTC module.
1233 This driver can also be built as a module, if so, the module
1234 will be called "rtc-snvs".
1236 comment "HID Sensor RTC drivers"
1238 config RTC_DRV_HID_SENSOR_TIME
1239 tristate "HID Sensor Time"
1242 select HID_SENSOR_HUB
1243 select HID_SENSOR_IIO_COMMON
1245 Say yes here to build support for the HID Sensors of type Time.
1246 This drivers makes such sensors available as RTCs.
1248 If this driver is compiled as a module, it will be named
1249 rtc-hid-sensor-time.