1 # SPDX-License-Identifier: GPL-2.0-only
3 # RTC class/drivers configuration
9 config RTC_MC146818_LIB
14 bool "Real Time Clock"
16 depends on !S390 && !UML
19 Generic RTC class support. If you say yes here, you will
20 be allowed to plug one or more RTCs to your system. You will
21 probably want to enable one or more of the interfaces below.
26 bool "Set system time from RTC on startup and resume"
29 If you say yes here, the system time (wall clock) will be set using
30 the value read from a specified RTC device. This is useful to avoid
31 unnecessary fsck runs at boot time, and to network better.
33 config RTC_HCTOSYS_DEVICE
34 string "RTC used to set the system time"
35 depends on RTC_HCTOSYS
38 The RTC device that will be used to (re)initialize the system
39 clock, usually rtc0. Initialization is done when the system
40 starts up, and when it resumes from a low power state. This
41 device should record time in UTC, since the kernel won't do
44 The driver for this RTC device must be loaded before late_initcall
45 functions run, so it must usually be statically linked.
47 This clock should be battery-backed, so that it reads the correct
48 time when the system boots from a power-off state. Otherwise, your
49 system will need an external clock source (like an NTP server).
51 If the clock you specify here is not battery backed, it may still
52 be useful to reinitialize system time when resuming from system
53 sleep states. Do not specify an RTC here unless it stays powered
54 during all this system's supported sleep states.
57 bool "Set the RTC time based on NTP synchronization"
60 If you say yes here, the system time (wall clock) will be stored
61 in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
62 minutes if userspace reports synchronized NTP status.
64 config RTC_SYSTOHC_DEVICE
65 string "RTC used to synchronize NTP adjustment"
66 depends on RTC_SYSTOHC
67 default RTC_HCTOSYS_DEVICE if RTC_HCTOSYS
70 The RTC device used for NTP synchronization. The main difference
71 between RTC_HCTOSYS_DEVICE and RTC_SYSTOHC_DEVICE is that this
72 one can sleep when setting time, because it runs in the workqueue
76 bool "RTC debug support"
78 Say yes here to enable debugging support in the RTC framework
79 and individual RTC drivers.
82 bool "RTC non volatile storage support"
86 Say yes here to add support for the non volatile (often battery
87 backed) storage present on RTCs.
89 comment "RTC interfaces"
92 bool "/sys/class/rtc/rtcN (sysfs)"
96 Say yes here if you want to use your RTCs using sysfs interfaces,
97 /sys/class/rtc/rtc0 through /sys/.../rtcN.
102 bool "/proc/driver/rtc (procfs for rtcN)"
106 Say yes here if you want to use your system clock RTC through
107 the proc interface, /proc/driver/rtc.
108 Other RTCs will not be available through that API.
109 If there is no RTC for the system clock, then the first RTC(rtc0)
115 bool "/dev/rtcN (character devices)"
118 Say yes here if you want to use your RTCs using the /dev
119 interfaces, which "udev" sets up as /dev/rtc0 through
122 You may want to set up a symbolic link so one of these
123 can be accessed as /dev/rtc, which is a name
124 expected by "hwclock" and some other programs. Recent
125 versions of "udev" are known to set up the symlink for you.
129 config RTC_INTF_DEV_UIE_EMUL
130 bool "RTC UIE emulation on dev interface"
131 depends on RTC_INTF_DEV
133 Provides an emulation for RTC_UIE if the underlying rtc chip
134 driver does not expose RTC_UIE ioctls. Those requests generate
135 once-per-second update interrupts, used for synchronization.
137 The emulation code will read the time from the hardware
138 clock several times per second, please enable this option
139 only if you know that you really need it.
142 tristate "Test driver/device"
144 If you say yes here you get support for the
145 RTC test driver. It's a software RTC which can be
146 used to test the RTC subsystem APIs. It gets
147 the time from the system clock.
148 You want this driver only if you are doing development
149 on the RTC subsystem. Please read the source code
152 This driver can also be built as a module. If so, the module
153 will be called rtc-test.
155 comment "I2C RTC drivers"
159 config RTC_DRV_88PM860X
160 tristate "Marvell 88PM860x"
161 depends on MFD_88PM860X
163 If you say yes here you get support for RTC function in Marvell
166 This driver can also be built as a module. If so, the module
167 will be called rtc-88pm860x.
169 config RTC_DRV_88PM80X
170 tristate "Marvell 88PM80x"
171 depends on MFD_88PM800
173 If you say yes here you get support for RTC function in Marvell
176 This driver can also be built as a module. If so, the module
177 will be called rtc-88pm80x.
179 config RTC_DRV_ABB5ZES3
181 tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3"
183 If you say yes here you get support for the Abracon
184 AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip.
186 This driver can also be built as a module. If so, the module
187 will be called rtc-ab-b5ze-s3.
189 config RTC_DRV_ABEOZ9
191 tristate "Abracon AB-RTCMC-32.768kHz-EOZ9"
193 If you say yes here you get support for the Abracon
194 AB-RTCMC-32.768kHz-EOA9 I2C RTC chip.
196 This driver can also be built as a module. If so, the module
197 will be called rtc-ab-e0z9.
199 config RTC_DRV_ABX80X
200 tristate "Abracon ABx80x"
201 select WATCHDOG_CORE if WATCHDOG
203 If you say yes here you get support for Abracon AB080X and AB180X
204 families of ultra-low-power battery- and capacitor-backed real-time
207 This driver can also be built as a module. If so, the module
208 will be called rtc-abx80x.
211 tristate "X-Powers AC100"
214 If you say yes here you get support for the real-time clock found
215 in X-Powers AC100 family peripheral ICs.
217 This driver can also be built as a module. If so, the module
218 will be called rtc-ac100.
220 config RTC_DRV_BRCMSTB
221 tristate "Broadcom STB wake-timer"
222 depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST
223 default ARCH_BRCMSTB || BMIPS_GENERIC
225 If you say yes here you get support for the wake-timer found on
226 Broadcom STB SoCs (BCM7xxx).
228 This driver can also be built as a module. If so, the module will
229 be called rtc-brcmstb-waketimer.
231 config RTC_DRV_AS3722
232 tristate "ams AS3722 RTC driver"
233 depends on MFD_AS3722
235 If you say yes here you get support for the RTC of ams AS3722 PMIC
238 This driver can also be built as a module. If so, the module
239 will be called rtc-as3722.
241 config RTC_DRV_DS1307
242 tristate "Dallas/Maxim DS1307/37/38/39/40/41, ST M41T00, EPSON RX-8025, ISL12057"
244 If you say yes here you get support for various compatible RTC
245 chips (often with battery backup) connected with I2C. This driver
246 should handle DS1307, DS1337, DS1338, DS1339, DS1340, DS1341,
247 ST M41T00, EPSON RX-8025, Intersil ISL12057 and probably other chips.
248 In some cases the RTC must already have been initialized (by
249 manufacturing or a bootloader).
251 The first seven registers on these chips hold an RTC, and other
252 registers may add features such as NVRAM, a trickle charger for
253 the RTC/NVRAM backup power, and alarms. NVRAM is visible in
254 sysfs, but other chip features may not be available.
256 This driver can also be built as a module. If so, the module
257 will be called rtc-ds1307.
259 config RTC_DRV_DS1307_CENTURY
260 bool "Century bit support for rtc-ds1307"
261 depends on RTC_DRV_DS1307
264 The DS1307 driver suffered from a bug where it was enabling the
265 century bit inconditionnally but never used it when reading the time.
266 It made the driver unable to support dates beyond 2099.
267 Setting this option will add proper support for the century bit but if
268 the time was previously set using a kernel predating this option,
269 reading the date will return a date in the next century.
270 To solve that, you could boot a kernel without this option set, set
271 the RTC date and then boot a kernel with this option set.
273 config RTC_DRV_DS1374
274 tristate "Dallas/Maxim DS1374"
276 If you say yes here you get support for Dallas Semiconductor
277 DS1374 real-time clock chips. If an interrupt is associated
278 with the device, the alarm functionality is supported.
280 This driver can also be built as a module. If so, the module
281 will be called rtc-ds1374.
283 config RTC_DRV_DS1374_WDT
284 bool "Dallas/Maxim DS1374 watchdog timer"
285 depends on RTC_DRV_DS1374
287 If you say Y here you will get support for the
288 watchdog timer in the Dallas Semiconductor DS1374
289 real-time clock chips.
291 config RTC_DRV_DS1672
292 tristate "Dallas/Maxim DS1672"
294 If you say yes here you get support for the
295 Dallas/Maxim DS1672 timekeeping chip.
297 This driver can also be built as a module. If so, the module
298 will be called rtc-ds1672.
300 config RTC_DRV_HYM8563
301 tristate "Haoyu Microelectronics HYM8563"
304 Say Y to enable support for the HYM8563 I2C RTC chip. Apart
305 from the usual rtc functions it provides a clock output of
308 This driver can also be built as a module. If so, the module
309 will be called rtc-hym8563.
311 config RTC_DRV_LP8788
312 tristate "TI LP8788 RTC driver"
313 depends on MFD_LP8788
315 Say Y to enable support for the LP8788 RTC/ALARM driver.
317 config RTC_DRV_MAX6900
318 tristate "Maxim MAX6900"
320 If you say yes here you will get support for the
321 Maxim MAX6900 I2C RTC chip.
323 This driver can also be built as a module. If so, the module
324 will be called rtc-max6900.
326 config RTC_DRV_MAX8907
327 tristate "Maxim MAX8907"
328 depends on MFD_MAX8907 || COMPILE_TEST
330 If you say yes here you will get support for the
331 RTC of Maxim MAX8907 PMIC.
333 This driver can also be built as a module. If so, the module
334 will be called rtc-max8907.
336 config RTC_DRV_MAX8925
337 tristate "Maxim MAX8925"
338 depends on MFD_MAX8925
340 If you say yes here you will get support for the
341 RTC of Maxim MAX8925 PMIC.
343 This driver can also be built as a module. If so, the module
344 will be called rtc-max8925.
346 config RTC_DRV_MAX8998
347 tristate "Maxim MAX8998"
348 depends on MFD_MAX8998
350 If you say yes here you will get support for the
351 RTC of Maxim MAX8998 PMIC.
353 This driver can also be built as a module. If so, the module
354 will be called rtc-max8998.
356 config RTC_DRV_MAX8997
357 tristate "Maxim MAX8997"
358 depends on MFD_MAX8997
360 If you say yes here you will get support for the
361 RTC of Maxim MAX8997 PMIC.
363 This driver can also be built as a module. If so, the module
364 will be called rtc-max8997.
366 config RTC_DRV_MAX77686
367 tristate "Maxim MAX77686"
368 depends on MFD_MAX77686 || MFD_MAX77620 || COMPILE_TEST
370 If you say yes here you will get support for the
371 RTC of Maxim MAX77686/MAX77620/MAX77802 PMIC.
373 This driver can also be built as a module. If so, the module
374 will be called rtc-max77686.
377 tristate "Rockchip RK805/RK808/RK809/RK817/RK818 RTC"
380 If you say yes here you will get support for the
381 RTC of RK805, RK809 and RK817, RK808 and RK818 PMIC.
383 This driver can also be built as a module. If so, the module
384 will be called rk808-rtc.
386 config RTC_DRV_RS5C372
387 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
389 If you say yes here you get support for the
390 Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
392 This driver can also be built as a module. If so, the module
393 will be called rtc-rs5c372.
395 config RTC_DRV_ISL1208
396 tristate "Intersil ISL1208"
398 If you say yes here you get support for the
399 Intersil ISL1208 RTC chip.
401 This driver can also be built as a module. If so, the module
402 will be called rtc-isl1208.
404 config RTC_DRV_ISL12022
405 tristate "Intersil ISL12022"
407 If you say yes here you get support for the
408 Intersil ISL12022 RTC chip.
410 This driver can also be built as a module. If so, the module
411 will be called rtc-isl12022.
413 config RTC_DRV_ISL12026
414 tristate "Intersil ISL12026"
415 depends on OF || COMPILE_TEST
417 If you say yes here you get support for the
418 Intersil ISL12026 RTC chip.
420 This driver can also be built as a module. If so, the module
421 will be called rtc-isl12026.
424 tristate "Xicor/Intersil X1205"
426 If you say yes here you get support for the
427 Xicor/Intersil X1205 RTC chip.
429 This driver can also be built as a module. If so, the module
430 will be called rtc-x1205.
432 config RTC_DRV_PCF8523
433 tristate "NXP PCF8523"
435 If you say yes here you get support for the NXP PCF8523 RTC
438 This driver can also be built as a module. If so, the module
439 will be called rtc-pcf8523.
441 config RTC_DRV_PCF85063
442 tristate "NXP PCF85063"
445 If you say yes here you get support for the PCF85063 RTC chip
447 This driver can also be built as a module. If so, the module
448 will be called rtc-pcf85063.
450 config RTC_DRV_PCF85363
451 tristate "NXP PCF85363"
454 If you say yes here you get support for the PCF85363 RTC chip.
456 This driver can also be built as a module. If so, the module
457 will be called rtc-pcf85363.
459 The nvmem interface will be named pcf85363-#, where # is the
460 zero-based instance number.
462 config RTC_DRV_PCF8563
463 tristate "Philips PCF8563/Epson RTC8564"
465 If you say yes here you get support for the
466 Philips PCF8563 RTC chip. The Epson RTC8564
469 This driver can also be built as a module. If so, the module
470 will be called rtc-pcf8563.
472 config RTC_DRV_PCF8583
473 tristate "Philips PCF8583"
475 If you say yes here you get support for the Philips PCF8583
476 RTC chip found on Acorn RiscPCs. This driver supports the
477 platform specific method of retrieving the current year from
478 the RTC's SRAM. It will work on other platforms with the same
479 chip, but the year will probably have to be tweaked.
481 This driver can also be built as a module. If so, the module
482 will be called rtc-pcf8583.
484 config RTC_DRV_M41T80
485 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible"
487 If you say Y here you will get support for the ST M41T60
488 and M41T80 RTC chips series. Currently, the following chips are
489 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
490 M41ST85, M41ST87, and MicroCrystal RV4162.
492 This driver can also be built as a module. If so, the module
493 will be called rtc-m41t80.
495 config RTC_DRV_M41T80_WDT
496 bool "ST M41T65/M41T80 series RTC watchdog timer"
497 depends on RTC_DRV_M41T80
499 If you say Y here you will get support for the
500 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
501 config RTC_DRV_BD70528
502 tristate "ROHM BD70528 PMIC RTC"
504 If you say Y here you will get support for the RTC
505 on ROHM BD70528 Power Management IC.
507 This driver can also be built as a module. If so, the module
508 will be called rtc-bd70528.
511 tristate "TI BQ32000"
513 If you say Y here you will get support for the TI
514 BQ32000 I2C RTC chip.
516 This driver can also be built as a module. If so, the module
517 will be called rtc-bq32k.
519 config RTC_DRV_DM355EVM
520 tristate "TI DaVinci DM355 EVM RTC"
521 depends on MFD_DM355EVM_MSP
523 Supports the RTC firmware in the MSP430 on the DM355 EVM.
525 config RTC_DRV_TWL92330
526 bool "TI TWL92330/Menelaus"
529 If you say yes here you get support for the RTC on the
530 TWL92330 "Menelaus" power management chip, used with OMAP2
531 platforms. The support is integrated with the rest of
532 the Menelaus driver; it's not separate module.
534 config RTC_DRV_TWL4030
535 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
536 depends on TWL4030_CORE
539 If you say yes here you get support for the RTC on the
540 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
542 This driver can also be built as a module. If so, the module
543 will be called rtc-twl.
545 config RTC_DRV_PALMAS
546 tristate "TI Palmas RTC driver"
547 depends on MFD_PALMAS
549 If you say yes here you get support for the RTC of TI PALMA series PMIC
552 This driver can also be built as a module. If so, the module
553 will be called rtc-palma.
555 config RTC_DRV_TPS6586X
556 tristate "TI TPS6586X RTC driver"
557 depends on MFD_TPS6586X
559 TI Power Management IC TPS6586X supports RTC functionality
560 along with alarm. This driver supports the RTC driver for
561 the TPS6586X RTC module.
563 config RTC_DRV_TPS65910
564 tristate "TI TPS65910 RTC driver"
565 depends on MFD_TPS65910
567 If you say yes here you get support for the RTC on the
570 This driver can also be built as a module. If so, the module
571 will be called rtc-tps65910.
573 config RTC_DRV_TPS80031
574 tristate "TI TPS80031/TPS80032 RTC driver"
575 depends on MFD_TPS80031
577 TI Power Management IC TPS80031 supports RTC functionality
578 along with alarm. This driver supports the RTC driver for
579 the TPS80031 RTC module.
581 config RTC_DRV_RC5T583
582 tristate "RICOH 5T583 RTC driver"
583 depends on MFD_RC5T583
585 If you say yes here you get support for the RTC on the
588 This driver can also be built as a module. If so, the module
589 will be called rtc-rc5t583.
591 config RTC_DRV_S35390A
592 tristate "Seiko Instruments S-35390A"
595 If you say yes here you will get support for the Seiko
596 Instruments S-35390A.
598 This driver can also be built as a module. If so the module
599 will be called rtc-s35390a.
601 config RTC_DRV_FM3130
602 tristate "Ramtron FM3130"
604 If you say Y here you will get support for the
605 Ramtron FM3130 RTC chips.
606 Ramtron FM3130 is a chip with two separate devices inside,
607 RTC clock and FRAM. This driver provides only RTC functionality.
609 This driver can also be built as a module. If so the module
610 will be called rtc-fm3130.
612 config RTC_DRV_RX8010
613 tristate "Epson RX8010SJ"
615 If you say yes here you get support for the Epson RX8010SJ RTC
618 This driver can also be built as a module. If so, the module
619 will be called rtc-rx8010.
621 config RTC_DRV_RX8581
622 tristate "Epson RX-8571/RX-8581"
624 If you say yes here you will get support for the Epson RX-8571/
627 This driver can also be built as a module. If so the module
628 will be called rtc-rx8581.
630 config RTC_DRV_RX8025
631 tristate "Epson RX-8025SA/NB"
633 If you say yes here you get support for the Epson
634 RX-8025SA/NB RTC chips.
636 This driver can also be built as a module. If so, the module
637 will be called rtc-rx8025.
639 config RTC_DRV_EM3027
640 tristate "EM Microelectronic EM3027"
642 If you say yes here you get support for the EM
643 Microelectronic EM3027 RTC chips.
645 This driver can also be built as a module. If so, the module
646 will be called rtc-em3027.
648 config RTC_DRV_RV3028
649 tristate "Micro Crystal RV3028"
651 If you say yes here you get support for the Micro Crystal
654 This driver can also be built as a module. If so, the module
655 will be called rtc-rv3028.
657 config RTC_DRV_RV8803
658 tristate "Micro Crystal RV8803, Epson RX8900"
660 If you say yes here you get support for the Micro Crystal RV8803 and
661 Epson RX8900 RTC chips.
663 This driver can also be built as a module. If so, the module
664 will be called rtc-rv8803.
667 tristate "Samsung S2M/S5M series"
668 depends on MFD_SEC_CORE || COMPILE_TEST
671 If you say yes here you will get support for the
672 RTC of Samsung S2MPS14 and S5M PMIC series.
674 This driver can also be built as a module. If so, the module
675 will be called rtc-s5m.
677 config RTC_DRV_SD3078
678 tristate "ZXW Shenzhen whwave SD3078"
680 If you say yes here you get support for the ZXW Shenzhen whwave
683 This driver can also be built as a module. If so, the module
684 will be called rtc-sd3078
688 comment "SPI RTC drivers"
692 config RTC_DRV_M41T93
695 If you say yes here you will get support for the
696 ST M41T93 SPI RTC chip.
698 This driver can also be built as a module. If so, the module
699 will be called rtc-m41t93.
701 config RTC_DRV_M41T94
704 If you say yes here you will get support for the
705 ST M41T94 SPI RTC chip.
707 This driver can also be built as a module. If so, the module
708 will be called rtc-m41t94.
710 config RTC_DRV_DS1302
711 tristate "Dallas/Maxim DS1302"
714 If you say yes here you get support for the Dallas DS1302 RTC chips.
716 This driver can also be built as a module. If so, the module
717 will be called rtc-ds1302.
719 config RTC_DRV_DS1305
720 tristate "Dallas/Maxim DS1305/DS1306"
722 Select this driver to get support for the Dallas/Maxim DS1305
723 and DS1306 real time clock chips. These support a trickle
724 charger, alarms, and NVRAM in addition to the clock.
726 This driver can also be built as a module. If so, the module
727 will be called rtc-ds1305.
729 config RTC_DRV_DS1343
731 tristate "Dallas/Maxim DS1343/DS1344"
733 If you say yes here you get support for the
734 Dallas/Maxim DS1343 and DS1344 real time clock chips.
735 Support for trickle charger, alarm is provided.
737 This driver can also be built as a module. If so, the module
738 will be called rtc-ds1343.
740 config RTC_DRV_DS1347
742 tristate "Dallas/Maxim DS1347"
744 If you say yes here you get support for the
745 Dallas/Maxim DS1347 chips.
747 This driver only supports the RTC feature, and not other chip
748 features such as alarms.
750 This driver can also be built as a module. If so, the module
751 will be called rtc-ds1347.
753 config RTC_DRV_DS1390
754 tristate "Dallas/Maxim DS1390/93/94"
756 If you say yes here you get support for the
757 Dallas/Maxim DS1390/93/94 chips.
759 This driver supports the RTC feature and trickle charging but not
760 other chip features such as alarms.
762 This driver can also be built as a module. If so, the module
763 will be called rtc-ds1390.
765 config RTC_DRV_MAX6916
766 tristate "Maxim MAX6916"
768 If you say yes here you will get support for the
769 Maxim MAX6916 SPI RTC chip.
771 This driver only supports the RTC feature, and not other chip
772 features such as alarms.
774 This driver can also be built as a module. If so, the module
775 will be called rtc-max6916.
778 tristate "Epson RTC-9701JE"
780 If you say yes here you will get support for the
781 Epson RTC-9701JE SPI RTC chip.
783 This driver can also be built as a module. If so, the module
784 will be called rtc-r9701.
786 config RTC_DRV_RX4581
787 tristate "Epson RX-4581"
789 If you say yes here you will get support for the Epson RX-4581.
791 This driver can also be built as a module. If so the module
792 will be called rtc-rx4581.
794 config RTC_DRV_RX6110
795 tristate "Epson RX-6110"
798 If you say yes here you will get support for the Epson RX-6610.
800 This driver can also be built as a module. If so the module
801 will be called rtc-rx6110.
803 config RTC_DRV_RS5C348
804 tristate "Ricoh RS5C348A/B"
806 If you say yes here you get support for the
807 Ricoh RS5C348A and RS5C348B RTC chips.
809 This driver can also be built as a module. If so, the module
810 will be called rtc-rs5c348.
812 config RTC_DRV_MAX6902
813 tristate "Maxim MAX6902"
815 If you say yes here you will get support for the
816 Maxim MAX6902 SPI RTC chip.
818 This driver can also be built as a module. If so, the module
819 will be called rtc-max6902.
821 config RTC_DRV_PCF2123
822 tristate "NXP PCF2123"
825 If you say yes here you get support for the NXP PCF2123
828 This driver can also be built as a module. If so, the module
829 will be called rtc-pcf2123.
831 config RTC_DRV_MCP795
832 tristate "Microchip MCP795"
834 If you say yes here you will get support for the Microchip MCP795.
836 This driver can also be built as a module. If so the module
837 will be called rtc-mcp795.
842 # Helper to resolve issues with configs that have SPI enabled but I2C
843 # modular. See SND_SOC_I2C_AND_SPI for more information
845 config RTC_I2C_AND_SPI
849 default y if SPI_MASTER=y
850 select REGMAP_I2C if I2C
851 select REGMAP_SPI if SPI_MASTER
853 comment "SPI and I2C RTC drivers"
855 config RTC_DRV_DS3232
856 tristate "Dallas/Maxim DS3232/DS3234"
857 depends on RTC_I2C_AND_SPI
859 If you say yes here you get support for Dallas Semiconductor
860 DS3232 and DS3234 real-time clock chips. If an interrupt is associated
861 with the device, the alarm functionality is supported.
863 This driver can also be built as a module. If so, the module
864 will be called rtc-ds3232.
866 config RTC_DRV_DS3232_HWMON
867 bool "HWMON support for Dallas/Maxim DS3232/DS3234"
868 depends on RTC_DRV_DS3232 && HWMON && !(RTC_DRV_DS3232=y && HWMON=m)
871 Say Y here if you want to expose temperature sensor data on
874 config RTC_DRV_PCF2127
875 tristate "NXP PCF2127"
876 depends on RTC_I2C_AND_SPI
878 If you say yes here you get support for the NXP PCF2127/29 RTC
881 This driver can also be built as a module. If so, the module
882 will be called rtc-pcf2127.
884 config RTC_DRV_RV3029C2
885 tristate "Micro Crystal RV3029/3049"
886 depends on RTC_I2C_AND_SPI
888 If you say yes here you get support for the Micro Crystal
889 RV3029 and RV3049 RTC chips.
891 This driver can also be built as a module. If so, the module
892 will be called rtc-rv3029c2.
894 config RTC_DRV_RV3029_HWMON
895 bool "HWMON support for RV3029/3049"
896 depends on RTC_DRV_RV3029C2 && HWMON
897 depends on !(RTC_DRV_RV3029C2=y && HWMON=m)
900 Say Y here if you want to expose temperature sensor data on
903 comment "Platform RTC drivers"
905 # this 'CMOS' RTC driver is arch dependent because it requires
906 # <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
907 # global rtc_lock ... it's not yet just another platform_device.
910 tristate "PC-style 'CMOS'"
911 depends on X86 || ARM || PPC || MIPS || SPARC64
913 select RTC_MC146818_LIB
915 Say "yes" here to get direct support for the real time clock
916 found in every PC or ACPI-based system, and some other boards.
917 Specifically the original MC146818, compatibles like those in
918 PC south bridges, the DS12887 or M48T86, some multifunction
919 or LPC bus chips, and so on.
921 Your system will need to define the platform device used by
922 this driver, otherwise it won't be accessible. This means
923 you can safely enable this driver if you don't know whether
924 or not your board has this kind of hardware.
926 This driver can also be built as a module. If so, the module
927 will be called rtc-cmos.
930 bool "Alpha PC-style CMOS"
932 select RTC_MC146818_LIB
935 Direct support for the real-time clock found on every Alpha
936 system, specifically MC146818 compatibles. If in doubt, say Y.
939 tristate "Virtual RTC for Intel MID platforms"
940 depends on X86_INTEL_MID
941 default y if X86_INTEL_MID
944 Say "yes" here to get direct support for the real time clock
945 found on Moorestown platforms. The VRTC is a emulated RTC that
946 derives its clock source from a real RTC in the PMIC. The MC146818
947 style programming interface is mostly conserved, but any
948 updates are done via IPC calls to the system controller FW.
950 config RTC_DRV_DS1216
951 tristate "Dallas DS1216"
954 If you say yes here you get support for the Dallas DS1216 RTC chips.
956 config RTC_DRV_DS1286
957 tristate "Dallas DS1286"
960 If you say yes here you get support for the Dallas DS1286 RTC chips.
962 config RTC_DRV_DS1511
963 tristate "Dallas DS1511"
966 If you say yes here you get support for the
967 Dallas DS1511 timekeeping/watchdog chip.
969 This driver can also be built as a module. If so, the module
970 will be called rtc-ds1511.
972 config RTC_DRV_DS1553
973 tristate "Maxim/Dallas DS1553"
976 If you say yes here you get support for the
977 Maxim/Dallas DS1553 timekeeping chip.
979 This driver can also be built as a module. If so, the module
980 will be called rtc-ds1553.
982 config RTC_DRV_DS1685_FAMILY
983 tristate "Dallas/Maxim DS1685 Family"
985 If you say yes here you get support for the Dallas/Maxim DS1685
986 family of real time chips. This family includes the DS1685/DS1687,
987 DS1689/DS1693, DS17285/DS17287, DS17485/DS17487, and
988 DS17885/DS17887 chips.
990 This driver can also be built as a module. If so, the module
991 will be called rtc-ds1685.
995 depends on RTC_DRV_DS1685_FAMILY
996 default RTC_DRV_DS1685
998 config RTC_DRV_DS1685
1001 This enables support for the Dallas/Maxim DS1685/DS1687 real time
1004 This chip is commonly found in SGI O2 (IP32) and SGI Octane (IP30)
1005 systems, as well as EPPC-405-UC modules by electronic system design
1008 config RTC_DRV_DS1689
1009 bool "DS1689/DS1693"
1011 This enables support for the Dallas/Maxim DS1689/DS1693 real time
1014 This is an older RTC chip, supplanted by the DS1685/DS1687 above,
1015 which supports a few minor features such as Vcc, Vbat, and Power
1016 Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
1018 It also works for the even older DS1688/DS1691 RTC chips, which are
1019 virtually the same and carry the same model number. Both chips
1020 have 114 bytes of user NVRAM.
1022 config RTC_DRV_DS17285
1023 bool "DS17285/DS17287"
1025 This enables support for the Dallas/Maxim DS17285/DS17287 real time
1028 This chip features 2kb of extended NV-SRAM. It may possibly be
1029 found in some SGI O2 systems (rare).
1031 config RTC_DRV_DS17485
1032 bool "DS17485/DS17487"
1034 This enables support for the Dallas/Maxim DS17485/DS17487 real time
1037 This chip features 4kb of extended NV-SRAM.
1039 config RTC_DRV_DS17885
1040 bool "DS17885/DS17887"
1042 This enables support for the Dallas/Maxim DS17885/DS17887 real time
1045 This chip features 8kb of extended NV-SRAM.
1049 config RTC_DRV_DS1742
1050 tristate "Maxim/Dallas DS1742/1743"
1051 depends on HAS_IOMEM
1053 If you say yes here you get support for the
1054 Maxim/Dallas DS1742/1743 timekeeping chip.
1056 This driver can also be built as a module. If so, the module
1057 will be called rtc-ds1742.
1059 config RTC_DRV_DS2404
1060 tristate "Maxim/Dallas DS2404"
1062 If you say yes here you get support for the
1063 Dallas DS2404 RTC chip.
1065 This driver can also be built as a module. If so, the module
1066 will be called rtc-ds2404.
1068 config RTC_DRV_DA9052
1069 tristate "Dialog DA9052/DA9053 RTC"
1070 depends on PMIC_DA9052
1072 Say y here to support the RTC driver for Dialog Semiconductor
1073 DA9052-BC and DA9053-AA/Bx PMICs.
1075 config RTC_DRV_DA9055
1076 tristate "Dialog Semiconductor DA9055 RTC"
1077 depends on MFD_DA9055
1079 If you say yes here you will get support for the
1080 RTC of the Dialog DA9055 PMIC.
1082 This driver can also be built as a module. If so, the module
1083 will be called rtc-da9055
1085 config RTC_DRV_DA9063
1086 tristate "Dialog Semiconductor DA9063/DA9062 RTC"
1087 depends on MFD_DA9063 || MFD_DA9062
1089 If you say yes here you will get support for the RTC subsystem
1090 for the Dialog Semiconductor PMIC chips DA9063 and DA9062.
1092 This driver can also be built as a module. If so, the module
1093 will be called "rtc-da9063".
1097 depends on EFI && !X86
1099 If you say yes here you will get support for the EFI
1102 This driver can also be built as a module. If so, the module
1103 will be called rtc-efi.
1105 config RTC_DRV_STK17TA8
1106 tristate "Simtek STK17TA8"
1107 depends on HAS_IOMEM
1109 If you say yes here you get support for the
1110 Simtek STK17TA8 timekeeping chip.
1112 This driver can also be built as a module. If so, the module
1113 will be called rtc-stk17ta8.
1115 config RTC_DRV_M48T86
1116 tristate "ST M48T86/Dallas DS12887"
1118 If you say Y here you will get support for the
1119 ST M48T86 and Dallas DS12887 RTC chips.
1121 This driver can also be built as a module. If so, the module
1122 will be called rtc-m48t86.
1124 config RTC_DRV_M48T35
1125 tristate "ST M48T35"
1126 depends on HAS_IOMEM
1128 If you say Y here you will get support for the
1131 This driver can also be built as a module, if so, the module
1132 will be called "rtc-m48t35".
1134 config RTC_DRV_M48T59
1135 tristate "ST M48T59/M48T08/M48T02"
1136 depends on HAS_IOMEM
1138 If you say Y here you will get support for the
1139 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
1141 These chips are usually found in Sun SPARC and UltraSPARC
1144 This driver can also be built as a module, if so, the module
1145 will be called "rtc-m48t59".
1147 config RTC_DRV_MSM6242
1148 tristate "Oki MSM6242"
1149 depends on HAS_IOMEM
1151 If you say yes here you get support for the Oki MSM6242
1152 timekeeping chip. It is used in some Amiga models (e.g. A2000).
1154 This driver can also be built as a module. If so, the module
1155 will be called rtc-msm6242.
1157 config RTC_DRV_BQ4802
1158 tristate "TI BQ4802"
1159 depends on HAS_IOMEM
1161 If you say Y here you will get support for the TI
1164 This driver can also be built as a module. If so, the module
1165 will be called rtc-bq4802.
1167 config RTC_DRV_RP5C01
1168 tristate "Ricoh RP5C01"
1169 depends on HAS_IOMEM
1171 If you say yes here you get support for the Ricoh RP5C01
1172 timekeeping chip. It is used in some Amiga models (e.g. A3000
1175 This driver can also be built as a module. If so, the module
1176 will be called rtc-rp5c01.
1178 config RTC_DRV_V3020
1179 tristate "EM Microelectronic V3020"
1181 If you say yes here you will get support for the
1182 EM Microelectronic v3020 RTC chip.
1184 This driver can also be built as a module. If so, the module
1185 will be called rtc-v3020.
1187 config RTC_DRV_WM831X
1188 tristate "Wolfson Microelectronics WM831x RTC"
1189 depends on MFD_WM831X
1191 If you say yes here you will get support for the RTC subsystem
1192 of the Wolfson Microelectronics WM831X series PMICs.
1194 This driver can also be built as a module. If so, the module
1195 will be called "rtc-wm831x".
1197 config RTC_DRV_WM8350
1198 tristate "Wolfson Microelectronics WM8350 RTC"
1199 depends on MFD_WM8350
1201 If you say yes here you will get support for the RTC subsystem
1202 of the Wolfson Microelectronics WM8350.
1204 This driver can also be built as a module. If so, the module
1205 will be called "rtc-wm8350".
1207 config RTC_DRV_SC27XX
1208 tristate "Spreadtrum SC27xx RTC"
1209 depends on MFD_SC27XX_PMIC || COMPILE_TEST
1211 If you say Y here you will get support for the RTC subsystem
1212 of the Spreadtrum SC27xx series PMICs. The SC27xx series PMICs
1213 includes the SC2720, SC2721, SC2723, SC2730 and SC2731 chips.
1215 This driver can also be built as a module. If so, the module
1216 will be called rtc-sc27xx.
1218 config RTC_DRV_SPEAR
1219 tristate "SPEAR ST RTC"
1220 depends on PLAT_SPEAR || COMPILE_TEST
1223 If you say Y here you will get support for the RTC found on
1226 config RTC_DRV_PCF50633
1227 depends on MFD_PCF50633
1228 tristate "NXP PCF50633 RTC"
1230 If you say yes here you get support for the RTC subsystem of the
1231 NXP PCF50633 used in embedded systems.
1233 config RTC_DRV_AB3100
1234 tristate "ST-Ericsson AB3100 RTC"
1235 depends on AB3100_CORE
1236 default y if AB3100_CORE
1238 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
1239 support. This chip contains a battery- and capacitor-backed RTC.
1241 config RTC_DRV_AB8500
1242 tristate "ST-Ericsson AB8500 RTC"
1243 depends on AB8500_CORE
1245 select RTC_INTF_DEV_UIE_EMUL
1247 Select this to enable the ST-Ericsson AB8500 power management IC RTC
1248 support. This chip contains a battery- and capacitor-backed RTC.
1251 tristate "IBM OPAL RTC driver"
1252 depends on PPC_POWERNV
1255 If you say yes here you get support for the PowerNV platform RTC
1256 driver based on OPAL interfaces.
1258 This driver can also be built as a module. If so, the module
1259 will be called rtc-opal.
1261 config RTC_DRV_ZYNQMP
1262 tristate "Xilinx Zynq Ultrascale+ MPSoC RTC"
1265 If you say yes here you get support for the RTC controller found on
1266 Xilinx Zynq Ultrascale+ MPSoC.
1268 config RTC_DRV_CROS_EC
1269 tristate "Chrome OS EC RTC driver"
1270 depends on MFD_CROS_EC
1272 If you say yes here you will get support for the
1273 Chrome OS Embedded Controller's RTC.
1275 This driver can also be built as a module. If so, the module
1276 will be called rtc-cros-ec.
1278 comment "on-CPU RTC drivers"
1280 config RTC_DRV_ASM9260
1281 tristate "Alphascale asm9260 RTC"
1282 depends on MACH_ASM9260 || COMPILE_TEST
1284 If you say yes here you get support for the RTC on the
1285 Alphascale asm9260 SoC.
1287 This driver can also be built as a module. If so, the module
1288 will be called rtc-asm9260.
1290 config RTC_DRV_DAVINCI
1291 tristate "TI DaVinci RTC"
1292 depends on ARCH_DAVINCI_DM365 || COMPILE_TEST
1294 If you say yes here you get support for the RTC on the
1295 DaVinci platforms (DM365).
1297 This driver can also be built as a module. If so, the module
1298 will be called rtc-davinci.
1300 config RTC_DRV_DIGICOLOR
1301 tristate "Conexant Digicolor RTC"
1302 depends on ARCH_DIGICOLOR || COMPILE_TEST
1304 If you say yes here you get support for the RTC on Conexant
1305 Digicolor platforms. This currently includes the CX92755 SoC.
1307 This driver can also be built as a module. If so, the module
1308 will be called rtc-digicolor.
1310 config RTC_DRV_IMXDI
1311 tristate "Freescale IMX DryIce Real Time Clock"
1314 Support for Freescale IMX DryIce RTC
1316 This driver can also be built as a module, if so, the module
1317 will be called "rtc-imxdi".
1319 config RTC_DRV_MESON
1320 tristate "Amlogic Meson RTC"
1321 depends on (ARM && ARCH_MESON) || COMPILE_TEST
1324 Support for the RTC block on the Amlogic Meson6, Meson8, Meson8b
1327 This driver can also be built as a module, if so, the module
1328 will be called "rtc-meson".
1331 tristate "TI OMAP Real Time Clock"
1332 depends on ARCH_OMAP || ARCH_DAVINCI || COMPILE_TEST
1335 select GENERIC_PINCONF
1337 Say "yes" here to support the on chip real time clock
1338 present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1340 This driver can also be built as a module, if so, module
1341 will be called rtc-omap.
1346 This will include RTC support for Samsung SoCs. If
1347 you want to include RTC support for any machine, kindly
1348 select this in the respective mach-XXXX/Kconfig file.
1351 tristate "Samsung S3C series SoC RTC"
1352 depends on ARCH_S3C64XX || HAVE_S3C_RTC || COMPILE_TEST
1354 RTC (Realtime Clock) driver for the clock inbuilt into the
1355 Samsung S3C24XX series of SoCs. This can provide periodic
1356 interrupt rates from 1Hz to 64Hz for user programs, and
1359 The driver currently supports the common features on all the
1360 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
1363 This driver can also be build as a module. If so, the module
1364 will be called rtc-s3c.
1366 config RTC_DRV_EP93XX
1367 tristate "Cirrus Logic EP93XX"
1368 depends on ARCH_EP93XX || COMPILE_TEST
1370 If you say yes here you get support for the
1371 RTC embedded in the Cirrus Logic EP93XX processors.
1373 This driver can also be built as a module. If so, the module
1374 will be called rtc-ep93xx.
1376 config RTC_DRV_SA1100
1377 tristate "SA11x0/PXA2xx/PXA910"
1378 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
1380 If you say Y here you will get access to the real time clock
1381 built into your SA11x0 or PXA2xx CPU.
1383 To compile this driver as a module, choose M here: the
1384 module will be called rtc-sa1100.
1387 tristate "SuperH On-Chip RTC"
1388 depends on SUPERH || ARCH_RENESAS
1390 Say Y here to enable support for the on-chip RTC found in
1391 most SuperH processors. This RTC is also found in RZ/A SoCs.
1393 To compile this driver as a module, choose M here: the
1394 module will be called rtc-sh.
1396 config RTC_DRV_VR41XX
1397 tristate "NEC VR41XX"
1398 depends on CPU_VR41XX || COMPILE_TEST
1400 If you say Y here you will get access to the real time clock
1401 built into your NEC VR41XX CPU.
1403 To compile this driver as a module, choose M here: the
1404 module will be called rtc-vr41xx.
1406 config RTC_DRV_PL030
1407 tristate "ARM AMBA PL030 RTC"
1410 If you say Y here you will get access to ARM AMBA
1411 PrimeCell PL030 RTC found on certain ARM SOCs.
1413 To compile this driver as a module, choose M here: the
1414 module will be called rtc-pl030.
1416 config RTC_DRV_PL031
1417 tristate "ARM AMBA PL031 RTC"
1420 If you say Y here you will get access to ARM AMBA
1421 PrimeCell PL031 RTC found on certain ARM SOCs.
1423 To compile this driver as a module, choose M here: the
1424 module will be called rtc-pl031.
1426 config RTC_DRV_AT91RM9200
1427 tristate "AT91RM9200 or some AT91SAM9 RTC"
1428 depends on ARCH_AT91 || COMPILE_TEST
1430 Driver for the internal RTC (Realtime Clock) module found on
1431 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
1432 this is powered by the backup power supply.
1434 config RTC_DRV_AT91SAM9
1435 tristate "AT91SAM9 RTT as RTC"
1436 depends on ARCH_AT91 || COMPILE_TEST
1437 depends on OF && HAS_IOMEM
1440 Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
1441 can be used as an RTC thanks to the backup power supply (e.g. a
1442 small coin cell battery) which keeps this block and the GPBR
1443 (General Purpose Backup Registers) block powered when the device
1445 Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
1446 probably want to use the real RTC block instead of the "RTT as an
1449 config RTC_DRV_AU1XXX
1450 tristate "Au1xxx Counter0 RTC support"
1451 depends on MIPS_ALCHEMY
1453 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1454 counter) to be used as a RTC.
1456 This driver can also be built as a module. If so, the module
1457 will be called rtc-au1xxx.
1459 config RTC_DRV_RS5C313
1460 tristate "Ricoh RS5C313"
1461 depends on SH_LANDISK
1463 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1465 config RTC_DRV_GENERIC
1466 tristate "Generic RTC support"
1467 # Please consider writing a new RTC driver instead of using the generic
1469 depends on PARISC || M68K || PPC || SUPERH32 || COMPILE_TEST
1471 Say Y or M here to enable RTC support on systems using the generic
1472 RTC abstraction. If you do not know what you are doing, you should
1476 tristate "PXA27x/PXA3xx"
1478 select RTC_DRV_SA1100
1480 If you say Y here you will get access to the real time clock
1481 built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs
1482 consisting of an SA1100 compatible RTC and the extended PXA RTC.
1484 This RTC driver uses PXA RTC registers available since pxa27x
1485 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1487 config RTC_DRV_VT8500
1488 tristate "VIA/WonderMedia 85xx SoC RTC"
1489 depends on ARCH_VT8500 || COMPILE_TEST
1491 If you say Y here you will get access to the real time clock
1492 built into your VIA VT8500 SoC or its relatives.
1495 config RTC_DRV_SUN4V
1496 bool "SUN4V Hypervisor RTC"
1499 If you say Y here you will get support for the Hypervisor
1500 based RTC on SUN4V systems.
1502 config RTC_DRV_SUN6I
1503 bool "Allwinner A31 RTC"
1504 default MACH_SUN6I || MACH_SUN8I
1505 depends on COMMON_CLK
1506 depends on ARCH_SUNXI || COMPILE_TEST
1508 If you say Y here you will get support for the RTC found in
1509 some Allwinner SoCs like the A31 or the A64.
1511 config RTC_DRV_SUNXI
1512 tristate "Allwinner sun4i/sun7i RTC"
1513 depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
1515 If you say Y here you will get support for the RTC found on
1518 config RTC_DRV_STARFIRE
1522 If you say Y here you will get support for the RTC found on
1525 config RTC_DRV_TX4939
1526 tristate "TX4939 SoC"
1527 depends on SOC_TX4939 || COMPILE_TEST
1529 Driver for the internal RTC (Realtime Clock) module found on
1533 tristate "Marvell SoC RTC"
1534 depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST
1536 If you say yes here you will get support for the in-chip RTC
1537 that can be found in some of Marvell's SoC devices, such as
1538 the Kirkwood 88F6281 and 88F6192.
1540 This driver can also be built as a module. If so, the module
1541 will be called rtc-mv.
1543 config RTC_DRV_ARMADA38X
1544 tristate "Armada 38x Marvell SoC RTC"
1545 depends on ARCH_MVEBU || COMPILE_TEST
1547 If you say yes here you will get support for the in-chip RTC
1548 that can be found in the Armada 38x Marvell's SoC device
1550 This driver can also be built as a module. If so, the module
1551 will be called armada38x-rtc.
1553 config RTC_DRV_CADENCE
1554 tristate "Cadence RTC driver"
1555 depends on OF && HAS_IOMEM
1557 If you say Y here you will get access to Cadence RTC IP
1558 found on certain SOCs.
1560 To compile this driver as a module, choose M here: the
1561 module will be called rtc-cadence.
1563 config RTC_DRV_FTRTC010
1564 tristate "Faraday Technology FTRTC010 RTC"
1565 depends on HAS_IOMEM
1568 If you say Y here you will get support for the
1569 Faraday Technolog FTRTC010 found on e.g. Gemini SoC's.
1571 This driver can also be built as a module. If so, the module
1572 will be called rtc-ftrtc010.
1578 If you say yes here you will get support for the RTC on PS3.
1580 This driver can also be built as a module. If so, the module
1581 will be called rtc-ps3.
1583 config RTC_DRV_COH901331
1584 tristate "ST-Ericsson COH 901 331 RTC"
1585 depends on ARCH_U300 || COMPILE_TEST
1587 If you say Y here you will get access to ST-Ericsson
1588 COH 901 331 RTC clock found in some ST-Ericsson Mobile
1591 This driver can also be built as a module. If so, the module
1592 will be called "rtc-coh901331".
1596 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1597 depends on ARCH_MXS || COMPILE_TEST
1600 If you say yes here you will get support for the onboard
1601 STMP3xxx/i.MX23/i.MX28 RTC.
1603 This driver can also be built as a module. If so, the module
1604 will be called rtc-stmp3xxx.
1610 If you say Y here you will get support for the RTC found on
1611 the PCAP2 ASIC used on some Motorola phones.
1613 config RTC_DRV_MC13XXX
1614 depends on MFD_MC13XXX
1615 tristate "Freescale MC13xxx RTC"
1617 This enables support for the RTCs found on Freescale's PMICs
1618 MC13783 and MC13892.
1620 config RTC_DRV_MPC5121
1621 tristate "Freescale MPC5121 built-in RTC"
1622 depends on PPC_MPC512x || PPC_MPC52xx
1624 If you say yes here you will get support for the
1625 built-in RTC on MPC5121 or on MPC5200.
1627 This driver can also be built as a module. If so, the module
1628 will be called rtc-mpc5121.
1630 config RTC_DRV_JZ4740
1631 tristate "Ingenic JZ4740 SoC"
1632 depends on MIPS || COMPILE_TEST
1634 If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
1637 This driver can also be built as a module. If so, the module
1638 will be called rtc-jz4740.
1640 config RTC_DRV_LPC24XX
1641 tristate "NXP RTC for LPC178x/18xx/408x/43xx"
1642 depends on ARCH_LPC18XX || COMPILE_TEST
1643 depends on OF && HAS_IOMEM
1645 This enables support for the NXP RTC found which can be found on
1646 NXP LPC178x/18xx/408x/43xx devices.
1648 If you have one of the devices above enable this driver to use
1649 the hardware RTC. This driver can also be built as a module. If
1650 so, the module will be called rtc-lpc24xx.
1652 config RTC_DRV_LPC32XX
1653 depends on ARCH_LPC32XX || COMPILE_TEST
1654 tristate "NXP LPC32XX RTC"
1656 This enables support for the NXP RTC in the LPC32XX
1658 This driver can also be built as a module. If so, the module
1659 will be called rtc-lpc32xx.
1661 config RTC_DRV_PM8XXX
1662 tristate "Qualcomm PMIC8XXX RTC"
1663 depends on MFD_PM8XXX || MFD_SPMI_PMIC || COMPILE_TEST
1665 If you say yes here you get support for the
1666 Qualcomm PMIC8XXX RTC.
1668 To compile this driver as a module, choose M here: the
1669 module will be called rtc-pm8xxx.
1671 config RTC_DRV_TEGRA
1672 tristate "NVIDIA Tegra Internal RTC driver"
1673 depends on ARCH_TEGRA || COMPILE_TEST
1675 If you say yes here you get support for the
1676 Tegra 200 series internal RTC module.
1678 This drive can also be built as a module. If so, the module
1679 will be called rtc-tegra.
1682 tristate "PKUnity v3 RTC support"
1683 depends on ARCH_PUV3
1685 This enables support for the RTC in the PKUnity-v3 SoCs.
1687 This drive can also be built as a module. If so, the module
1688 will be called rtc-puv3.
1690 config RTC_DRV_LOONGSON1
1691 tristate "loongson1 RTC support"
1692 depends on MACH_LOONGSON32
1694 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1695 counter) to be used as a RTC.
1697 This driver can also be built as a module. If so, the module
1698 will be called rtc-ls1x.
1701 tristate "Freescale MXC Real Time Clock"
1704 If you say yes here you get support for the Freescale MXC
1707 This driver can also be built as a module, if so, the module
1708 will be called "rtc-mxc".
1710 config RTC_DRV_MXC_V2
1711 tristate "Freescale MXC Real Time Clock for i.MX53"
1714 If you say yes here you get support for the Freescale MXC
1715 SRTC module in i.MX53 processor.
1717 This driver can also be built as a module, if so, the module
1718 will be called "rtc-mxc_v2".
1721 tristate "Freescale SNVS RTC support"
1723 depends on HAS_IOMEM
1726 If you say yes here you get support for the Freescale SNVS
1727 Low Power (LP) RTC module.
1729 This driver can also be built as a module, if so, the module
1730 will be called "rtc-snvs".
1732 config RTC_DRV_IMX_SC
1734 depends on HAVE_ARM_SMCCC
1735 tristate "NXP i.MX System Controller RTC support"
1737 If you say yes here you get support for the NXP i.MX System
1738 Controller RTC module.
1740 config RTC_DRV_SIRFSOC
1741 tristate "SiRFSOC RTC"
1742 depends on ARCH_SIRF
1744 Say "yes" here to support the real time clock on SiRF SOC chips.
1745 This driver can also be built as a module called rtc-sirfsoc.
1747 config RTC_DRV_ST_LPC
1748 tristate "STMicroelectronics LPC RTC"
1752 Say Y here to include STMicroelectronics Low Power Controller
1753 (LPC) based RTC support.
1755 To compile this driver as a module, choose M here: the
1756 module will be called rtc-st-lpc.
1758 config RTC_DRV_MOXART
1759 tristate "MOXA ART RTC"
1760 depends on ARCH_MOXART || COMPILE_TEST
1762 If you say yes here you get support for the MOXA ART
1765 This driver can also be built as a module. If so, the module
1766 will be called rtc-moxart
1768 config RTC_DRV_MT6397
1769 tristate "MediaTek PMIC based RTC"
1770 depends on MFD_MT6397 || (COMPILE_TEST && IRQ_DOMAIN)
1772 This selects the MediaTek(R) RTC driver. RTC is part of MediaTek
1773 MT6397 PMIC. You should enable MT6397 PMIC MFD before select
1774 MediaTek(R) RTC driver.
1776 If you want to use MediaTek(R) RTC interface, select Y or M here.
1778 config RTC_DRV_MT7622
1779 tristate "MediaTek SoC based RTC"
1780 depends on ARCH_MEDIATEK || COMPILE_TEST
1782 This enables support for the real time clock built in the MediaTek
1785 This drive can also be built as a module. If so, the module
1786 will be called rtc-mt7622.
1788 config RTC_DRV_XGENE
1789 tristate "APM X-Gene RTC"
1790 depends on HAS_IOMEM
1791 depends on ARCH_XGENE || COMPILE_TEST
1793 If you say yes here you get support for the APM X-Gene SoC real time
1796 This driver can also be built as a module, if so, the module
1797 will be called "rtc-xgene".
1799 config RTC_DRV_PIC32
1800 tristate "Microchip PIC32 RTC"
1801 depends on MACH_PIC32
1804 If you say yes here you get support for the PIC32 RTC module.
1806 This driver can also be built as a module. If so, the module
1807 will be called rtc-pic32
1809 config RTC_DRV_R7301
1810 tristate "EPSON TOYOCOM RTC-7301SF/DG"
1812 depends on OF && HAS_IOMEM
1814 If you say yes here you get support for the EPSON TOYOCOM
1815 RTC-7301SF/DG chips.
1817 This driver can also be built as a module. If so, the module
1818 will be called rtc-r7301.
1820 config RTC_DRV_STM32
1821 tristate "STM32 RTC"
1823 depends on ARCH_STM32 || COMPILE_TEST
1825 If you say yes here you get support for the STM32 On-Chip
1828 This driver can also be built as a module, if so, the module
1829 will be called "rtc-stm32".
1831 config RTC_DRV_CPCAP
1832 depends on MFD_CPCAP
1833 tristate "Motorola CPCAP RTC"
1835 Say y here for CPCAP rtc found on some Motorola phones
1836 and tablets such as Droid 4.
1838 config RTC_DRV_RTD119X
1839 bool "Realtek RTD129x RTC"
1840 depends on ARCH_REALTEK || COMPILE_TEST
1841 default ARCH_REALTEK
1843 If you say yes here, you get support for the RTD1295 SoC
1846 config RTC_DRV_ASPEED
1847 tristate "ASPEED RTC"
1849 depends on ARCH_ASPEED || COMPILE_TEST
1851 If you say yes here you get support for the ASPEED BMC SoC real time
1854 This driver can also be built as a module, if so, the module
1855 will be called "rtc-aspeed".
1857 comment "HID Sensor RTC drivers"
1859 config RTC_DRV_HID_SENSOR_TIME
1860 tristate "HID Sensor Time"
1862 depends on HID_SENSOR_HUB && IIO
1863 select HID_SENSOR_IIO_COMMON
1865 Say yes here to build support for the HID Sensors of type Time.
1866 This drivers makes such sensors available as RTCs.
1868 If this driver is compiled as a module, it will be named
1869 rtc-hid-sensor-time.
1871 config RTC_DRV_GOLDFISH
1872 tristate "Goldfish Real Time Clock"
1873 depends on OF && HAS_IOMEM
1874 depends on GOLDFISH || COMPILE_TEST
1876 Say yes to enable RTC driver for the Goldfish based virtual platform.
1878 Goldfish is a code name for the virtual platform developed by Google
1879 for Android emulation.
1881 config RTC_DRV_WILCO_EC
1882 tristate "Wilco EC RTC"
1886 If you say yes here, you get read/write support for the Real Time
1887 Clock on the Wilco Embedded Controller (Wilco is a kind of Chromebook)
1889 This can also be built as a module. If so, the module will
1890 be named "rtc_wilco_ec".