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_PCF2127
317 tristate "NXP PCF2127"
319 If you say yes here you get support for the NXP PCF2127/29 RTC
322 This driver can also be built as a module. If so, the module
323 will be called rtc-pcf2127.
325 config RTC_DRV_PCF8523
326 tristate "NXP PCF8523"
328 If you say yes here you get support for the NXP PCF8523 RTC
331 This driver can also be built as a module. If so, the module
332 will be called rtc-pcf8523.
334 config RTC_DRV_PCF8563
335 tristate "Philips PCF8563/Epson RTC8564"
337 If you say yes here you get support for the
338 Philips PCF8563 RTC chip. The Epson RTC8564
341 This driver can also be built as a module. If so, the module
342 will be called rtc-pcf8563.
344 config RTC_DRV_PCF8583
345 tristate "Philips PCF8583"
347 If you say yes here you get support for the Philips PCF8583
348 RTC chip found on Acorn RiscPCs. This driver supports the
349 platform specific method of retrieving the current year from
350 the RTC's SRAM. It will work on other platforms with the same
351 chip, but the year will probably have to be tweaked.
353 This driver can also be built as a module. If so, the module
354 will be called rtc-pcf8583.
356 config RTC_DRV_M41T80
357 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87"
359 If you say Y here you will get support for the ST M41T60
360 and M41T80 RTC chips series. Currently, the following chips are
361 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
362 M41ST85, and M41ST87.
364 This driver can also be built as a module. If so, the module
365 will be called rtc-m41t80.
367 config RTC_DRV_M41T80_WDT
368 bool "ST M41T65/M41T80 series RTC watchdog timer"
369 depends on RTC_DRV_M41T80
371 If you say Y here you will get support for the
372 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
375 tristate "TI BQ32000"
377 If you say Y here you will get support for the TI
378 BQ32000 I2C RTC chip.
380 This driver can also be built as a module. If so, the module
381 will be called rtc-bq32k.
383 config RTC_DRV_DM355EVM
384 tristate "TI DaVinci DM355 EVM RTC"
385 depends on MFD_DM355EVM_MSP
387 Supports the RTC firmware in the MSP430 on the DM355 EVM.
389 config RTC_DRV_TWL92330
390 boolean "TI TWL92330/Menelaus"
393 If you say yes here you get support for the RTC on the
394 TWL92330 "Menelaus" power management chip, used with OMAP2
395 platforms. The support is integrated with the rest of
396 the Menelaus driver; it's not separate module.
398 config RTC_DRV_TWL4030
399 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
400 depends on TWL4030_CORE
402 If you say yes here you get support for the RTC on the
403 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
405 This driver can also be built as a module. If so, the module
406 will be called rtc-twl.
408 config RTC_DRV_TPS6586X
409 tristate "TI TPS6586X RTC driver"
410 depends on MFD_TPS6586X
412 TI Power Management IC TPS6586X supports RTC functionality
413 along with alarm. This driver supports the RTC driver for
414 the TPS6586X RTC module.
416 config RTC_DRV_TPS65910
417 tristate "TI TPS65910 RTC driver"
418 depends on RTC_CLASS && MFD_TPS65910
420 If you say yes here you get support for the RTC on the
423 This driver can also be built as a module. If so, the module
424 will be called rtc-tps65910.
426 config RTC_DRV_TPS80031
427 tristate "TI TPS80031/TPS80032 RTC driver"
428 depends on MFD_TPS80031
430 TI Power Management IC TPS80031 supports RTC functionality
431 along with alarm. This driver supports the RTC driver for
432 the TPS80031 RTC module.
434 config RTC_DRV_RC5T583
435 tristate "RICOH 5T583 RTC driver"
436 depends on MFD_RC5T583
438 If you say yes here you get support for the RTC on the
441 This driver can also be built as a module. If so, the module
442 will be called rtc-rc5t583.
444 config RTC_DRV_S35390A
445 tristate "Seiko Instruments S-35390A"
448 If you say yes here you will get support for the Seiko
449 Instruments S-35390A.
451 This driver can also be built as a module. If so the module
452 will be called rtc-s35390a.
454 config RTC_DRV_FM3130
455 tristate "Ramtron FM3130"
457 If you say Y here you will get support for the
458 Ramtron FM3130 RTC chips.
459 Ramtron FM3130 is a chip with two separate devices inside,
460 RTC clock and FRAM. This driver provides only RTC functionality.
462 This driver can also be built as a module. If so the module
463 will be called rtc-fm3130.
465 config RTC_DRV_RX8581
466 tristate "Epson RX-8581"
468 If you say yes here you will get support for the Epson RX-8581.
470 This driver can also be built as a module. If so the module
471 will be called rtc-rx8581.
473 config RTC_DRV_RX8025
474 tristate "Epson RX-8025SA/NB"
476 If you say yes here you get support for the Epson
477 RX-8025SA/NB RTC chips.
479 This driver can also be built as a module. If so, the module
480 will be called rtc-rx8025.
482 config RTC_DRV_EM3027
483 tristate "EM Microelectronic EM3027"
485 If you say yes here you get support for the EM
486 Microelectronic EM3027 RTC chips.
488 This driver can also be built as a module. If so, the module
489 will be called rtc-em3027.
491 config RTC_DRV_RV3029C2
492 tristate "Micro Crystal RTC"
494 If you say yes here you get support for the Micro Crystal
497 This driver can also be built as a module. If so, the module
498 will be called rtc-rv3029c2.
502 comment "SPI RTC drivers"
506 config RTC_DRV_M41T93
509 If you say yes here you will get support for the
510 ST M41T93 SPI RTC chip.
512 This driver can also be built as a module. If so, the module
513 will be called rtc-m41t93.
515 config RTC_DRV_M41T94
518 If you say yes here you will get support for the
519 ST M41T94 SPI RTC chip.
521 This driver can also be built as a module. If so, the module
522 will be called rtc-m41t94.
524 config RTC_DRV_DS1305
525 tristate "Dallas/Maxim DS1305/DS1306"
527 Select this driver to get support for the Dallas/Maxim DS1305
528 and DS1306 real time clock chips. These support a trickle
529 charger, alarms, and NVRAM in addition to the clock.
531 This driver can also be built as a module. If so, the module
532 will be called rtc-ds1305.
534 config RTC_DRV_DS1390
535 tristate "Dallas/Maxim DS1390/93/94"
537 If you say yes here you get support for the
538 Dallas/Maxim DS1390/93/94 chips.
540 This driver only supports the RTC feature, and not other chip
541 features such as alarms and trickle charging.
543 This driver can also be built as a module. If so, the module
544 will be called rtc-ds1390.
546 config RTC_DRV_MAX6902
547 tristate "Maxim MAX6902"
549 If you say yes here you will get support for the
550 Maxim MAX6902 SPI RTC chip.
552 This driver can also be built as a module. If so, the module
553 will be called rtc-max6902.
556 tristate "Epson RTC-9701JE"
558 If you say yes here you will get support for the
559 Epson RTC-9701JE SPI RTC chip.
561 This driver can also be built as a module. If so, the module
562 will be called rtc-r9701.
564 config RTC_DRV_RS5C348
565 tristate "Ricoh RS5C348A/B"
567 If you say yes here you get support for the
568 Ricoh RS5C348A and RS5C348B RTC chips.
570 This driver can also be built as a module. If so, the module
571 will be called rtc-rs5c348.
573 config RTC_DRV_DS3234
574 tristate "Maxim/Dallas DS3234"
576 If you say yes here you get support for the
577 Maxim/Dallas DS3234 SPI RTC chip.
579 This driver can also be built as a module. If so, the module
580 will be called rtc-ds3234.
582 config RTC_DRV_PCF2123
583 tristate "NXP PCF2123"
585 If you say yes here you get support for the NXP PCF2123
588 This driver can also be built as a module. If so, the module
589 will be called rtc-pcf2123.
591 config RTC_DRV_RX4581
592 tristate "Epson RX-4581"
594 If you say yes here you will get support for the Epson RX-4581.
596 This driver can also be built as a module. If so the module
597 will be called rtc-rx4581.
601 comment "Platform RTC drivers"
603 # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
604 # requires <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
605 # global rtc_lock ... it's not yet just another platform_device.
608 tristate "PC-style 'CMOS'"
609 depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS || SPARC64
612 Say "yes" here to get direct support for the real time clock
613 found in every PC or ACPI-based system, and some other boards.
614 Specifically the original MC146818, compatibles like those in
615 PC south bridges, the DS12887 or M48T86, some multifunction
616 or LPC bus chips, and so on.
618 Your system will need to define the platform device used by
619 this driver, otherwise it won't be accessible. This means
620 you can safely enable this driver if you don't know whether
621 or not your board has this kind of hardware.
623 This driver can also be built as a module. If so, the module
624 will be called rtc-cmos.
627 tristate "Virtual RTC for Intel MID platforms"
628 depends on X86_INTEL_MID
629 default y if X86_INTEL_MID
632 Say "yes" here to get direct support for the real time clock
633 found on Moorestown platforms. The VRTC is a emulated RTC that
634 derives its clock source from a real RTC in the PMIC. The MC146818
635 style programming interface is mostly conserved, but any
636 updates are done via IPC calls to the system controller FW.
638 config RTC_DRV_DS1216
639 tristate "Dallas DS1216"
642 If you say yes here you get support for the Dallas DS1216 RTC chips.
644 config RTC_DRV_DS1286
645 tristate "Dallas DS1286"
647 If you say yes here you get support for the Dallas DS1286 RTC chips.
649 config RTC_DRV_DS1302
650 tristate "Dallas DS1302"
651 depends on SH_SECUREEDGE5410
653 If you say yes here you get support for the Dallas DS1302 RTC chips.
655 config RTC_DRV_DS1511
656 tristate "Dallas DS1511"
658 If you say yes here you get support for the
659 Dallas DS1511 timekeeping/watchdog chip.
661 This driver can also be built as a module. If so, the module
662 will be called rtc-ds1511.
664 config RTC_DRV_DS1553
665 tristate "Maxim/Dallas DS1553"
667 If you say yes here you get support for the
668 Maxim/Dallas DS1553 timekeeping chip.
670 This driver can also be built as a module. If so, the module
671 will be called rtc-ds1553.
673 config RTC_DRV_DS1742
674 tristate "Maxim/Dallas DS1742/1743"
676 If you say yes here you get support for the
677 Maxim/Dallas DS1742/1743 timekeeping chip.
679 This driver can also be built as a module. If so, the module
680 will be called rtc-ds1742.
682 config RTC_DRV_DA9052
683 tristate "Dialog DA9052/DA9053 RTC"
684 depends on PMIC_DA9052
686 Say y here to support the RTC driver for Dialog Semiconductor
687 DA9052-BC and DA9053-AA/Bx PMICs.
689 config RTC_DRV_DA9055
690 tristate "Dialog Semiconductor DA9055 RTC"
691 depends on MFD_DA9055
693 If you say yes here you will get support for the
694 RTC of the Dialog DA9055 PMIC.
696 This driver can also be built as a module. If so, the module
697 will be called rtc-da9055
703 If you say yes here you will get support for the EFI
706 This driver can also be built as a module. If so, the module
707 will be called rtc-efi.
709 config RTC_DRV_STK17TA8
710 tristate "Simtek STK17TA8"
712 If you say yes here you get support for the
713 Simtek STK17TA8 timekeeping chip.
715 This driver can also be built as a module. If so, the module
716 will be called rtc-stk17ta8.
718 config RTC_DRV_M48T86
719 tristate "ST M48T86/Dallas DS12887"
721 If you say Y here you will get support for the
722 ST M48T86 and Dallas DS12887 RTC chips.
724 This driver can also be built as a module. If so, the module
725 will be called rtc-m48t86.
727 config RTC_DRV_M48T35
730 If you say Y here you will get support for the
733 This driver can also be built as a module, if so, the module
734 will be called "rtc-m48t35".
736 config RTC_DRV_M48T59
737 tristate "ST M48T59/M48T08/M48T02"
739 If you say Y here you will get support for the
740 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
742 These chips are usually found in Sun SPARC and UltraSPARC
745 This driver can also be built as a module, if so, the module
746 will be called "rtc-m48t59".
748 config RTC_DRV_MSM6242
749 tristate "Oki MSM6242"
751 If you say yes here you get support for the Oki MSM6242
752 timekeeping chip. It is used in some Amiga models (e.g. A2000).
754 This driver can also be built as a module. If so, the module
755 will be called rtc-msm6242.
757 config RTC_DRV_BQ4802
760 If you say Y here you will get support for the TI
763 This driver can also be built as a module. If so, the module
764 will be called rtc-bq4802.
766 config RTC_DRV_RP5C01
767 tristate "Ricoh RP5C01"
769 If you say yes here you get support for the Ricoh RP5C01
770 timekeeping chip. It is used in some Amiga models (e.g. A3000
773 This driver can also be built as a module. If so, the module
774 will be called rtc-rp5c01.
777 tristate "EM Microelectronic V3020"
779 If you say yes here you will get support for the
780 EM Microelectronic v3020 RTC chip.
782 This driver can also be built as a module. If so, the module
783 will be called rtc-v3020.
785 config RTC_DRV_DS2404
786 tristate "Dallas DS2404"
788 If you say yes here you get support for the
789 Dallas DS2404 RTC chip.
791 This driver can also be built as a module. If so, the module
792 will be called rtc-ds2404.
794 config RTC_DRV_WM831X
795 tristate "Wolfson Microelectronics WM831x RTC"
796 depends on MFD_WM831X
798 If you say yes here you will get support for the RTC subsystem
799 of the Wolfson Microelectronics WM831X series PMICs.
801 This driver can also be built as a module. If so, the module
802 will be called "rtc-wm831x".
804 config RTC_DRV_WM8350
805 tristate "Wolfson Microelectronics WM8350 RTC"
806 depends on MFD_WM8350
808 If you say yes here you will get support for the RTC subsystem
809 of the Wolfson Microelectronics WM8350.
811 This driver can also be built as a module. If so, the module
812 will be called "rtc-wm8350".
815 tristate "SPEAR ST RTC"
816 depends on PLAT_SPEAR
819 If you say Y here you will get support for the RTC found on
822 config RTC_DRV_PCF50633
823 depends on MFD_PCF50633
824 tristate "NXP PCF50633 RTC"
826 If you say yes here you get support for the RTC subsystem of the
827 NXP PCF50633 used in embedded systems.
829 config RTC_DRV_AB3100
830 tristate "ST-Ericsson AB3100 RTC"
831 depends on AB3100_CORE
832 default y if AB3100_CORE
834 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
835 support. This chip contains a battery- and capacitor-backed RTC.
837 config RTC_DRV_AB8500
838 tristate "ST-Ericsson AB8500 RTC"
839 depends on AB8500_CORE
841 select RTC_INTF_DEV_UIE_EMUL
843 Select this to enable the ST-Ericsson AB8500 power management IC RTC
844 support. This chip contains a battery- and capacitor-backed RTC.
846 config RTC_DRV_NUC900
847 tristate "NUC910/NUC920 RTC driver"
848 depends on ARCH_W90X900
850 If you say yes here you get support for the RTC subsystem of the
851 NUC910/NUC920 used in embedded systems.
853 comment "on-CPU RTC drivers"
855 config RTC_DRV_DAVINCI
856 tristate "TI DaVinci RTC"
857 depends on ARCH_DAVINCI_DM365
859 If you say yes here you get support for the RTC on the
860 DaVinci platforms (DM365).
862 This driver can also be built as a module. If so, the module
863 will be called rtc-davinci.
866 tristate "Freescale IMX DryIce Real Time Clock"
869 Support for Freescale IMX DryIce RTC
871 This driver can also be built as a module, if so, the module
872 will be called "rtc-imxdi".
876 depends on ARCH_OMAP15XX || ARCH_OMAP16XX || ARCH_OMAP730 || ARCH_DAVINCI_DA8XX || SOC_AM33XX
878 Say "yes" here to support the on chip real time clock
879 present on TI OMAP1, AM33xx and DA8xx/OMAP-L13x.
881 This driver can also be built as a module, if so, module
882 will be called rtc-omap.
887 This will include RTC support for Samsung SoCs. If
888 you want to include RTC support for any machine, kindly
889 select this in the respective mach-XXXX/Kconfig file.
892 tristate "Samsung S3C series SoC RTC"
893 depends on ARCH_S3C64XX || HAVE_S3C_RTC
895 RTC (Realtime Clock) driver for the clock inbuilt into the
896 Samsung S3C24XX series of SoCs. This can provide periodic
897 interrupt rates from 1Hz to 64Hz for user programs, and
900 The driver currently supports the common features on all the
901 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
904 This driver can also be build as a module. If so, the module
905 will be called rtc-s3c.
907 config RTC_DRV_EP93XX
908 tristate "Cirrus Logic EP93XX"
909 depends on ARCH_EP93XX
911 If you say yes here you get support for the
912 RTC embedded in the Cirrus Logic EP93XX processors.
914 This driver can also be built as a module. If so, the module
915 will be called rtc-ep93xx.
917 config RTC_DRV_SA1100
918 tristate "SA11x0/PXA2xx/PXA910"
919 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
921 If you say Y here you will get access to the real time clock
922 built into your SA11x0 or PXA2xx CPU.
924 To compile this driver as a module, choose M here: the
925 module will be called rtc-sa1100.
928 tristate "SuperH On-Chip RTC"
929 depends on SUPERH && HAVE_CLK
931 Say Y here to enable support for the on-chip RTC found in
932 most SuperH processors.
934 To compile this driver as a module, choose M here: the
935 module will be called rtc-sh.
937 config RTC_DRV_VR41XX
938 tristate "NEC VR41XX"
939 depends on CPU_VR41XX
941 If you say Y here you will get access to the real time clock
942 built into your NEC VR41XX CPU.
944 To compile this driver as a module, choose M here: the
945 module will be called rtc-vr41xx.
948 tristate "ARM AMBA PL030 RTC"
951 If you say Y here you will get access to ARM AMBA
952 PrimeCell PL030 RTC found on certain ARM SOCs.
954 To compile this driver as a module, choose M here: the
955 module will be called rtc-pl030.
958 tristate "ARM AMBA PL031 RTC"
961 If you say Y here you will get access to ARM AMBA
962 PrimeCell PL031 RTC found on certain ARM SOCs.
964 To compile this driver as a module, choose M here: the
965 module will be called rtc-pl031.
967 config RTC_DRV_AT32AP700X
968 tristate "AT32AP700X series RTC"
969 depends on PLATFORM_AT32AP
971 Driver for the internal RTC (Realtime Clock) on Atmel AVR32
972 AT32AP700x family processors.
974 config RTC_DRV_AT91RM9200
975 tristate "AT91RM9200 or some AT91SAM9 RTC"
978 Driver for the internal RTC (Realtime Clock) module found on
979 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
980 this is powered by the backup power supply.
982 config RTC_DRV_AT91SAM9
983 tristate "AT91SAM9x/AT91CAP9 RTT as RTC"
984 depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
986 RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
987 (Real Time Timer). These timers are powered by the backup power
988 supply (such as a small coin cell battery), but do not need to
991 (On AT91SAM9rl and AT91SAM9G45 chips you probably want to use the
992 dedicated RTC module and leave the RTT available for other uses.)
994 config RTC_DRV_AT91SAM9_RTT
998 prompt "RTT module Number" if ARCH_AT91SAM9263
999 depends on RTC_DRV_AT91SAM9
1001 More than one RTT module is available. You can choose which
1002 one will be used as an RTC. The default of zero is normally
1003 OK to use, though some systems use that for non-RTC purposes.
1005 config RTC_DRV_AT91SAM9_GPBR
1007 range 0 3 if !ARCH_AT91SAM9263
1008 range 0 15 if ARCH_AT91SAM9263
1010 prompt "Backup Register Number"
1011 depends on RTC_DRV_AT91SAM9
1013 The RTC driver needs to use one of the General Purpose Backup
1014 Registers (GPBRs) as well as the RTT. You can choose which one
1015 will be used. The default of zero is normally OK to use, but
1016 on some systems other software needs to use that register.
1018 config RTC_DRV_AU1XXX
1019 tristate "Au1xxx Counter0 RTC support"
1020 depends on MIPS_ALCHEMY
1022 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1023 counter) to be used as a RTC.
1025 This driver can also be built as a module. If so, the module
1026 will be called rtc-au1xxx.
1029 tristate "Blackfin On-Chip RTC"
1030 depends on BLACKFIN && !BF561
1032 If you say yes here you will get support for the
1033 Blackfin On-Chip Real Time Clock.
1035 This driver can also be built as a module. If so, the module
1036 will be called rtc-bfin.
1038 config RTC_DRV_RS5C313
1039 tristate "Ricoh RS5C313"
1040 depends on SH_LANDISK
1042 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1044 config RTC_DRV_GENERIC
1045 tristate "Generic RTC support"
1046 # Please consider writing a new RTC driver instead of using the generic
1048 depends on PARISC || M68K || PPC || SUPERH32
1050 Say Y or M here to enable RTC support on systems using the generic
1051 RTC abstraction. If you do not know what you are doing, you should
1055 tristate "PXA27x/PXA3xx"
1058 If you say Y here you will get access to the real time clock
1059 built into your PXA27x or PXA3xx CPU.
1061 This RTC driver uses PXA RTC registers available since pxa27x
1062 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1064 config RTC_DRV_VT8500
1065 tristate "VIA/WonderMedia 85xx SoC RTC"
1066 depends on ARCH_VT8500
1068 If you say Y here you will get access to the real time clock
1069 built into your VIA VT8500 SoC or its relatives.
1072 config RTC_DRV_SUN4V
1073 bool "SUN4V Hypervisor RTC"
1076 If you say Y here you will get support for the Hypervisor
1077 based RTC on SUN4V systems.
1079 config RTC_DRV_STARFIRE
1083 If you say Y here you will get support for the RTC found on
1086 config RTC_DRV_TX4939
1087 tristate "TX4939 SoC"
1088 depends on SOC_TX4939
1090 Driver for the internal RTC (Realtime Clock) module found on
1094 tristate "Marvell SoC RTC"
1095 depends on ARCH_KIRKWOOD || ARCH_DOVE || ARCH_MVEBU
1097 If you say yes here you will get support for the in-chip RTC
1098 that can be found in some of Marvell's SoC devices, such as
1099 the Kirkwood 88F6281 and 88F6192.
1101 This driver can also be built as a module. If so, the module
1102 will be called rtc-mv.
1108 If you say yes here you will get support for the RTC on PS3.
1110 This driver can also be built as a module. If so, the module
1111 will be called rtc-ps3.
1113 config RTC_DRV_COH901331
1114 tristate "ST-Ericsson COH 901 331 RTC"
1115 depends on ARCH_U300
1117 If you say Y here you will get access to ST-Ericsson
1118 COH 901 331 RTC clock found in some ST-Ericsson Mobile
1121 This driver can also be built as a module. If so, the module
1122 will be called "rtc-coh901331".
1126 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1129 If you say yes here you will get support for the onboard
1130 STMP3xxx/i.MX23/i.MX28 RTC.
1132 This driver can also be built as a module. If so, the module
1133 will be called rtc-stmp3xxx.
1139 If you say Y here you will get support for the RTC found on
1140 the PCAP2 ASIC used on some Motorola phones.
1142 config RTC_DRV_MC13XXX
1143 depends on MFD_MC13XXX
1144 tristate "Freescale MC13xxx RTC"
1146 This enables support for the RTCs found on Freescale's PMICs
1147 MC13783 and MC13892.
1149 config RTC_DRV_MPC5121
1150 tristate "Freescale MPC5121 built-in RTC"
1151 depends on PPC_MPC512x || PPC_MPC52xx
1153 If you say yes here you will get support for the
1154 built-in RTC on MPC5121 or on MPC5200.
1156 This driver can also be built as a module. If so, the module
1157 will be called rtc-mpc5121.
1159 config RTC_DRV_JZ4740
1160 tristate "Ingenic JZ4740 SoC"
1161 depends on MACH_JZ4740
1163 If you say yes here you get support for the Ingenic JZ4740 SoC RTC
1166 This driver can also be buillt as a module. If so, the module
1167 will be called rtc-jz4740.
1169 config RTC_DRV_LPC32XX
1170 depends on ARCH_LPC32XX
1171 tristate "NXP LPC32XX RTC"
1173 This enables support for the NXP RTC in the LPC32XX
1175 This driver can also be buillt as a module. If so, the module
1176 will be called rtc-lpc32xx.
1178 config RTC_DRV_PM8XXX
1179 tristate "Qualcomm PMIC8XXX RTC"
1180 depends on MFD_PM8XXX
1182 If you say yes here you get support for the
1183 Qualcomm PMIC8XXX RTC.
1185 To compile this driver as a module, choose M here: the
1186 module will be called rtc-pm8xxx.
1188 config RTC_DRV_TEGRA
1189 tristate "NVIDIA Tegra Internal RTC driver"
1190 depends on ARCH_TEGRA
1192 If you say yes here you get support for the
1193 Tegra 200 series internal RTC module.
1195 This drive can also be built as a module. If so, the module
1196 will be called rtc-tegra.
1199 tristate "Tilera hypervisor RTC support"
1202 Enable support for the Linux driver side of the Tilera
1203 hypervisor's real-time clock interface.
1206 tristate "PKUnity v3 RTC support"
1207 depends on ARCH_PUV3
1209 This enables support for the RTC in the PKUnity-v3 SoCs.
1211 This drive can also be built as a module. If so, the module
1212 will be called rtc-puv3.
1214 config RTC_DRV_LOONGSON1
1215 tristate "loongson1 RTC support"
1216 depends on MACH_LOONGSON1
1218 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1219 counter) to be used as a RTC.
1221 This driver can also be built as a module. If so, the module
1222 will be called rtc-ls1x.
1225 tristate "Freescale MXC Real Time Clock"
1228 If you say yes here you get support for the Freescale MXC
1231 This driver can also be built as a module, if so, the module
1232 will be called "rtc-mxc".
1235 tristate "Freescale SNVS RTC support"
1236 depends on HAS_IOMEM
1239 If you say yes here you get support for the Freescale SNVS
1240 Low Power (LP) RTC module.
1242 This driver can also be built as a module, if so, the module
1243 will be called "rtc-snvs".
1245 config RTC_DRV_SIRFSOC
1246 tristate "SiRFSOC RTC"
1247 depends on ARCH_SIRF
1249 Say "yes" here to support the real time clock on SiRF SOC chips.
1250 This driver can also be built as a module called rtc-sirfsoc.
1252 config RTC_DRV_MOXART
1253 tristate "MOXA ART RTC"
1255 If you say yes here you get support for the MOXA ART
1258 This driver can also be built as a module. If so, the module
1259 will be called rtc-moxart
1261 comment "HID Sensor RTC drivers"
1263 config RTC_DRV_HID_SENSOR_TIME
1264 tristate "HID Sensor Time"
1267 select HID_SENSOR_HUB
1268 select HID_SENSOR_IIO_COMMON
1270 Say yes here to build support for the HID Sensors of type Time.
1271 This drivers makes such sensors available as RTCs.
1273 If this driver is compiled as a module, it will be named
1274 rtc-hid-sensor-time.