1 # SPDX-License-Identifier: GPL-2.0-only
3 # RTC class/drivers configuration
9 config RTC_MC146818_LIB
14 bool "Real Time Clock"
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 This clock should be battery-backed, so that it reads the correct
45 time when the system boots from a power-off state. Otherwise, your
46 system will need an external clock source (like an NTP server).
48 If the clock you specify here is not battery backed, it may still
49 be useful to reinitialize system time when resuming from system
50 sleep states. Do not specify an RTC here unless it stays powered
51 during all this system's supported sleep states.
54 bool "Set the RTC time based on NTP synchronization"
57 If you say yes here, the system time (wall clock) will be stored
58 in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
59 minutes if userspace reports synchronized NTP status.
61 config RTC_SYSTOHC_DEVICE
62 string "RTC used to synchronize NTP adjustment"
63 depends on RTC_SYSTOHC
64 default RTC_HCTOSYS_DEVICE if RTC_HCTOSYS
67 The RTC device used for NTP synchronization. The main difference
68 between RTC_HCTOSYS_DEVICE and RTC_SYSTOHC_DEVICE is that this
69 one can sleep when setting time, because it runs in the workqueue
73 bool "RTC debug support"
75 Say yes here to enable debugging support in the RTC framework
76 and individual RTC drivers.
78 config RTC_LIB_KUNIT_TEST
79 tristate "KUnit test for RTC lib functions" if !KUNIT_ALL_TESTS
81 default KUNIT_ALL_TESTS
83 Enable this option to test RTC library functions.
88 bool "RTC non volatile storage support"
92 Say yes here to add support for the non volatile (often battery
93 backed) storage present on RTCs.
95 comment "RTC interfaces"
98 bool "/sys/class/rtc/rtcN (sysfs)"
102 Say yes here if you want to use your RTCs using sysfs interfaces,
103 /sys/class/rtc/rtc0 through /sys/.../rtcN.
108 bool "/proc/driver/rtc (procfs for rtcN)"
112 Say yes here if you want to use your system clock RTC through
113 the proc interface, /proc/driver/rtc.
114 Other RTCs will not be available through that API.
115 If there is no RTC for the system clock, then the first RTC(rtc0)
121 bool "/dev/rtcN (character devices)"
124 Say yes here if you want to use your RTCs using the /dev
125 interfaces, which "udev" sets up as /dev/rtc0 through
128 You may want to set up a symbolic link so one of these
129 can be accessed as /dev/rtc, which is a name
130 expected by "hwclock" and some other programs. Recent
131 versions of "udev" are known to set up the symlink for you.
135 config RTC_INTF_DEV_UIE_EMUL
136 bool "RTC UIE emulation on dev interface"
137 depends on RTC_INTF_DEV
139 Provides an emulation for RTC_UIE if the underlying rtc chip
140 driver does not expose RTC_UIE ioctls. Those requests generate
141 once-per-second update interrupts, used for synchronization.
143 The emulation code will read the time from the hardware
144 clock several times per second, please enable this option
145 only if you know that you really need it.
148 tristate "Test driver/device"
150 If you say yes here you get support for the
151 RTC test driver. It's a software RTC which can be
152 used to test the RTC subsystem APIs. It gets
153 the time from the system clock.
154 You want this driver only if you are doing development
155 on the RTC subsystem. Please read the source code
158 This driver can also be built as a module. If so, the module
159 will be called rtc-test.
161 comment "I2C RTC drivers"
165 config RTC_DRV_88PM860X
166 tristate "Marvell 88PM860x"
167 depends on MFD_88PM860X
169 If you say yes here you get support for RTC function in Marvell
172 This driver can also be built as a module. If so, the module
173 will be called rtc-88pm860x.
175 config RTC_DRV_88PM80X
176 tristate "Marvell 88PM80x"
177 depends on MFD_88PM800
179 If you say yes here you get support for RTC function in Marvell
182 This driver can also be built as a module. If so, the module
183 will be called rtc-88pm80x.
185 config RTC_DRV_ABB5ZES3
187 tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3"
189 If you say yes here you get support for the Abracon
190 AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip.
192 This driver can also be built as a module. If so, the module
193 will be called rtc-ab-b5ze-s3.
195 config RTC_DRV_ABEOZ9
197 tristate "Abracon AB-RTCMC-32.768kHz-EOZ9"
199 If you say yes here you get support for the Abracon
200 AB-RTCMC-32.768kHz-EOA9 I2C RTC chip.
202 This driver can also be built as a module. If so, the module
203 will be called rtc-ab-e0z9.
205 config RTC_DRV_ABX80X
206 tristate "Abracon ABx80x"
207 select WATCHDOG_CORE if WATCHDOG
209 If you say yes here you get support for Abracon AB080X and AB180X
210 families of ultra-low-power battery- and capacitor-backed real-time
213 This driver can also be built as a module. If so, the module
214 will be called rtc-abx80x.
217 tristate "X-Powers AC100"
220 If you say yes here you get support for the real-time clock found
221 in X-Powers AC100 family peripheral ICs.
223 This driver can also be built as a module. If so, the module
224 will be called rtc-ac100.
226 config RTC_DRV_BRCMSTB
227 tristate "Broadcom STB wake-timer"
228 depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST
229 default ARCH_BRCMSTB || BMIPS_GENERIC
231 If you say yes here you get support for the wake-timer found on
232 Broadcom STB SoCs (BCM7xxx).
234 This driver can also be built as a module. If so, the module will
235 be called rtc-brcmstb-waketimer.
237 config RTC_DRV_AS3722
238 tristate "ams AS3722 RTC driver"
239 depends on MFD_AS3722
241 If you say yes here you get support for the RTC of ams AS3722 PMIC
244 This driver can also be built as a module. If so, the module
245 will be called rtc-as3722.
247 config RTC_DRV_DS1307
248 tristate "Dallas/Maxim DS1307/37/38/39/40/41, ST M41T00, EPSON RX-8025, ISL12057"
250 select WATCHDOG_CORE if WATCHDOG
252 If you say yes here you get support for various compatible RTC
253 chips (often with battery backup) connected with I2C. This driver
254 should handle DS1307, DS1337, DS1338, DS1339, DS1340, DS1341,
255 ST M41T00, EPSON RX-8025, Intersil ISL12057 and probably other chips.
256 In some cases the RTC must already have been initialized (by
257 manufacturing or a bootloader).
259 The first seven registers on these chips hold an RTC, and other
260 registers may add features such as NVRAM, a trickle charger for
261 the RTC/NVRAM backup power, and alarms. NVRAM is visible in
262 sysfs, but other chip features may not be available.
264 This driver can also be built as a module. If so, the module
265 will be called rtc-ds1307.
267 config RTC_DRV_DS1307_CENTURY
268 bool "Century bit support for rtc-ds1307"
269 depends on RTC_DRV_DS1307
272 The DS1307 driver suffered from a bug where it was enabling the
273 century bit inconditionnally but never used it when reading the time.
274 It made the driver unable to support dates beyond 2099.
275 Setting this option will add proper support for the century bit but if
276 the time was previously set using a kernel predating this option,
277 reading the date will return a date in the next century.
278 To solve that, you could boot a kernel without this option set, set
279 the RTC date and then boot a kernel with this option set.
281 config RTC_DRV_DS1374
282 tristate "Dallas/Maxim DS1374"
284 If you say yes here you get support for Dallas Semiconductor
285 DS1374 real-time clock chips. If an interrupt is associated
286 with the device, the alarm functionality is supported.
288 This driver can also be built as a module. If so, the module
289 will be called rtc-ds1374.
291 config RTC_DRV_DS1374_WDT
292 bool "Dallas/Maxim DS1374 watchdog timer"
293 depends on RTC_DRV_DS1374 && WATCHDOG
296 If you say Y here you will get support for the
297 watchdog timer in the Dallas Semiconductor DS1374
298 real-time clock chips.
300 config RTC_DRV_DS1672
301 tristate "Dallas/Maxim DS1672"
303 If you say yes here you get support for the
304 Dallas/Maxim DS1672 timekeeping chip.
306 This driver can also be built as a module. If so, the module
307 will be called rtc-ds1672.
309 config RTC_DRV_HYM8563
310 tristate "Haoyu Microelectronics HYM8563"
313 Say Y to enable support for the HYM8563 I2C RTC chip. Apart
314 from the usual rtc functions it provides a clock output of
317 This driver can also be built as a module. If so, the module
318 will be called rtc-hym8563.
320 config RTC_DRV_LP8788
321 tristate "TI LP8788 RTC driver"
322 depends on MFD_LP8788
324 Say Y to enable support for the LP8788 RTC/ALARM driver.
326 config RTC_DRV_MAX6900
327 tristate "Maxim MAX6900"
329 If you say yes here you will get support for the
330 Maxim MAX6900 I2C RTC chip.
332 This driver can also be built as a module. If so, the module
333 will be called rtc-max6900.
335 config RTC_DRV_MAX8907
336 tristate "Maxim MAX8907"
337 depends on MFD_MAX8907 || COMPILE_TEST
340 If you say yes here you will get support for the
341 RTC of Maxim MAX8907 PMIC.
343 This driver can also be built as a module. If so, the module
344 will be called rtc-max8907.
346 config RTC_DRV_MAX8925
347 tristate "Maxim MAX8925"
348 depends on MFD_MAX8925
350 If you say yes here you will get support for the
351 RTC of Maxim MAX8925 PMIC.
353 This driver can also be built as a module. If so, the module
354 will be called rtc-max8925.
356 config RTC_DRV_MAX8998
357 tristate "Maxim MAX8998"
358 depends on MFD_MAX8998
360 If you say yes here you will get support for the
361 RTC of Maxim MAX8998 PMIC.
363 This driver can also be built as a module. If so, the module
364 will be called rtc-max8998.
366 config RTC_DRV_MAX8997
367 tristate "Maxim MAX8997"
368 depends on MFD_MAX8997
370 If you say yes here you will get support for the
371 RTC of Maxim MAX8997 PMIC.
373 This driver can also be built as a module. If so, the module
374 will be called rtc-max8997.
376 config RTC_DRV_MAX77686
377 tristate "Maxim MAX77686"
378 depends on MFD_MAX77686 || MFD_MAX77620 || MFD_MAX77714 || COMPILE_TEST
380 If you say yes here you will get support for the
381 RTC of Maxim MAX77686/MAX77620/MAX77802 PMIC.
383 This driver can also be built as a module. If so, the module
384 will be called rtc-max77686.
386 config RTC_DRV_NCT3018Y
387 tristate "Nuvoton NCT3018Y"
390 If you say yes here you get support for the Nuvoton NCT3018Y I2C RTC
393 This driver can also be built as a module, if so, the module will be
394 called "rtc-nct3018y".
397 tristate "Rockchip RK805/RK808/RK809/RK817/RK818 RTC"
400 If you say yes here you will get support for the
401 RTC of RK805, RK809 and RK817, RK808 and RK818 PMIC.
403 This driver can also be built as a module. If so, the module
404 will be called rk808-rtc.
406 config RTC_DRV_RS5C372
407 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
409 If you say yes here you get support for the
410 Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
412 This driver can also be built as a module. If so, the module
413 will be called rtc-rs5c372.
415 config RTC_DRV_ISL1208
416 tristate "Intersil ISL1208"
418 If you say yes here you get support for the
419 Intersil ISL1208 RTC chip.
421 This driver can also be built as a module. If so, the module
422 will be called rtc-isl1208.
424 config RTC_DRV_ISL12022
425 tristate "Intersil ISL12022"
428 If you say yes here you get support for the
429 Intersil ISL12022 RTC chip.
431 This driver can also be built as a module. If so, the module
432 will be called rtc-isl12022.
434 config RTC_DRV_ISL12026
435 tristate "Intersil ISL12026"
436 depends on OF || COMPILE_TEST
438 If you say yes here you get support for the
439 Intersil ISL12026 RTC chip.
441 This driver can also be built as a module. If so, the module
442 will be called rtc-isl12026.
445 tristate "Xicor/Intersil X1205"
447 If you say yes here you get support for the
448 Xicor/Intersil X1205 RTC chip.
450 This driver can also be built as a module. If so, the module
451 will be called rtc-x1205.
453 config RTC_DRV_PCF8523
454 tristate "NXP PCF8523"
457 If you say yes here you get support for the NXP PCF8523 RTC
460 This driver can also be built as a module. If so, the module
461 will be called rtc-pcf8523.
463 config RTC_DRV_PCF85063
464 tristate "NXP PCF85063"
467 If you say yes here you get support for the PCF85063 RTC chip
469 This driver can also be built as a module. If so, the module
470 will be called rtc-pcf85063.
472 config RTC_DRV_PCF85363
473 tristate "NXP PCF85363"
476 If you say yes here you get support for the PCF85363 RTC chip.
478 This driver can also be built as a module. If so, the module
479 will be called rtc-pcf85363.
481 The nvmem interface will be named pcf85363-#, where # is the
482 zero-based instance number.
484 config RTC_DRV_PCF8563
485 tristate "Philips PCF8563/Epson RTC8564"
487 If you say yes here you get support for the
488 Philips PCF8563 RTC chip. The Epson RTC8564
491 This driver can also be built as a module. If so, the module
492 will be called rtc-pcf8563.
494 config RTC_DRV_PCF8583
495 tristate "Philips PCF8583"
497 If you say yes here you get support for the Philips PCF8583
498 RTC chip found on Acorn RiscPCs. This driver supports the
499 platform specific method of retrieving the current year from
500 the RTC's SRAM. It will work on other platforms with the same
501 chip, but the year will probably have to be tweaked.
503 This driver can also be built as a module. If so, the module
504 will be called rtc-pcf8583.
506 config RTC_DRV_M41T80
507 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible"
509 If you say Y here you will get support for the ST M41T60
510 and M41T80 RTC chips series. Currently, the following chips are
511 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
512 M41ST85, M41ST87, and MicroCrystal RV4162.
514 This driver can also be built as a module. If so, the module
515 will be called rtc-m41t80.
517 config RTC_DRV_M41T80_WDT
518 bool "ST M41T65/M41T80 series RTC watchdog timer"
519 depends on RTC_DRV_M41T80
521 If you say Y here you will get support for the
522 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
524 config RTC_DRV_BD70528
525 tristate "ROHM BD71815 and BD71828 PMIC RTC"
526 depends on MFD_ROHM_BD71828
528 If you say Y here you will get support for the RTC
529 block on ROHM BD71815 and BD71828 Power Management IC.
531 This driver can also be built as a module. If so, the module
532 will be called rtc-bd70528.
535 tristate "TI BQ32000"
537 If you say Y here you will get support for the TI
538 BQ32000 I2C RTC chip.
540 This driver can also be built as a module. If so, the module
541 will be called rtc-bq32k.
543 config RTC_DRV_DM355EVM
544 tristate "TI DaVinci DM355 EVM RTC"
545 depends on MFD_DM355EVM_MSP
547 Supports the RTC firmware in the MSP430 on the DM355 EVM.
549 config RTC_DRV_TWL92330
550 bool "TI TWL92330/Menelaus"
553 If you say yes here you get support for the RTC on the
554 TWL92330 "Menelaus" power management chip, used with OMAP2
555 platforms. The support is integrated with the rest of
556 the Menelaus driver; it's not separate module.
558 config RTC_DRV_TWL4030
559 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
560 depends on TWL4030_CORE
563 If you say yes here you get support for the RTC on the
564 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
566 This driver can also be built as a module. If so, the module
567 will be called rtc-twl.
569 config RTC_DRV_PALMAS
570 tristate "TI Palmas RTC driver"
571 depends on MFD_PALMAS
573 If you say yes here you get support for the RTC of TI PALMA series PMIC
576 This driver can also be built as a module. If so, the module
577 will be called rtc-palma.
579 config RTC_DRV_TPS6586X
580 tristate "TI TPS6586X RTC driver"
581 depends on MFD_TPS6586X
583 TI Power Management IC TPS6586X supports RTC functionality
584 along with alarm. This driver supports the RTC driver for
585 the TPS6586X RTC module.
587 config RTC_DRV_TPS65910
588 tristate "TI TPS65910 RTC driver"
589 depends on MFD_TPS65910
591 If you say yes here you get support for the RTC on the
594 This driver can also be built as a module. If so, the module
595 will be called rtc-tps65910.
597 config RTC_DRV_RC5T583
598 tristate "RICOH 5T583 RTC driver"
599 depends on MFD_RC5T583
601 If you say yes here you get support for the RTC on the
604 This driver can also be built as a module. If so, the module
605 will be called rtc-rc5t583.
607 config RTC_DRV_RC5T619
608 tristate "RICOH RC5T619 RTC driver"
609 depends on MFD_RN5T618
611 If you say yes here you get support for the RTC on the
614 This driver can also be built as a module. If so, the module
615 will be called rtc-rc5t619.
617 config RTC_DRV_S35390A
618 tristate "Seiko Instruments S-35390A"
621 If you say yes here you will get support for the Seiko
622 Instruments S-35390A.
624 This driver can also be built as a module. If so the module
625 will be called rtc-s35390a.
627 config RTC_DRV_FM3130
628 tristate "Ramtron FM3130"
630 If you say Y here you will get support for the
631 Ramtron FM3130 RTC chips.
632 Ramtron FM3130 is a chip with two separate devices inside,
633 RTC clock and FRAM. This driver provides only RTC functionality.
635 This driver can also be built as a module. If so the module
636 will be called rtc-fm3130.
638 config RTC_DRV_RX8010
639 tristate "Epson RX8010SJ"
642 If you say yes here you get support for the Epson RX8010SJ RTC
645 This driver can also be built as a module. If so, the module
646 will be called rtc-rx8010.
648 config RTC_DRV_RX8581
649 tristate "Epson RX-8571/RX-8581"
652 If you say yes here you will get support for the Epson RX-8571/
655 This driver can also be built as a module. If so the module
656 will be called rtc-rx8581.
658 config RTC_DRV_RX8025
659 tristate "Epson RX-8025SA/NB"
661 If you say yes here you get support for the Epson
662 RX-8025SA/NB RTC chips.
664 This driver can also be built as a module. If so, the module
665 will be called rtc-rx8025.
667 config RTC_DRV_EM3027
668 tristate "EM Microelectronic EM3027"
670 If you say yes here you get support for the EM
671 Microelectronic EM3027 RTC chips.
673 This driver can also be built as a module. If so, the module
674 will be called rtc-em3027.
676 config RTC_DRV_RV3028
677 tristate "Micro Crystal RV3028"
680 If you say yes here you get support for the Micro Crystal
683 This driver can also be built as a module. If so, the module
684 will be called rtc-rv3028.
686 config RTC_DRV_RV3032
687 tristate "Micro Crystal RV3032"
690 If you say yes here you get support for the Micro Crystal
693 This driver can also be built as a module. If so, the module
694 will be called rtc-rv3032.
696 config RTC_DRV_RV8803
697 tristate "Micro Crystal RV8803, Epson RX8900"
699 If you say yes here you get support for the Micro Crystal RV8803 and
700 Epson RX8900 RTC chips.
702 This driver can also be built as a module. If so, the module
703 will be called rtc-rv8803.
706 tristate "Samsung S2M/S5M series"
707 depends on MFD_SEC_CORE || COMPILE_TEST
711 If you say yes here you will get support for the
712 RTC of Samsung S2MPS14 and S5M PMIC series.
714 This driver can also be built as a module. If so, the module
715 will be called rtc-s5m.
717 config RTC_DRV_SD3078
718 tristate "ZXW Shenzhen whwave SD3078"
721 If you say yes here you get support for the ZXW Shenzhen whwave
724 This driver can also be built as a module. If so, the module
725 will be called rtc-sd3078
729 comment "SPI RTC drivers"
733 config RTC_DRV_M41T93
736 If you say yes here you will get support for the
737 ST M41T93 SPI RTC chip.
739 This driver can also be built as a module. If so, the module
740 will be called rtc-m41t93.
742 config RTC_DRV_M41T94
745 If you say yes here you will get support for the
746 ST M41T94 SPI RTC chip.
748 This driver can also be built as a module. If so, the module
749 will be called rtc-m41t94.
751 config RTC_DRV_DS1302
752 tristate "Dallas/Maxim DS1302"
755 If you say yes here you get support for the Dallas DS1302 RTC chips.
757 This driver can also be built as a module. If so, the module
758 will be called rtc-ds1302.
760 config RTC_DRV_DS1305
761 tristate "Dallas/Maxim DS1305/DS1306"
763 Select this driver to get support for the Dallas/Maxim DS1305
764 and DS1306 real time clock chips. These support a trickle
765 charger, alarms, and NVRAM in addition to the clock.
767 This driver can also be built as a module. If so, the module
768 will be called rtc-ds1305.
770 config RTC_DRV_DS1343
772 tristate "Dallas/Maxim DS1343/DS1344"
774 If you say yes here you get support for the
775 Dallas/Maxim DS1343 and DS1344 real time clock chips.
776 Support for trickle charger, alarm is provided.
778 This driver can also be built as a module. If so, the module
779 will be called rtc-ds1343.
781 config RTC_DRV_DS1347
783 tristate "Dallas/Maxim DS1347"
785 If you say yes here you get support for the
786 Dallas/Maxim DS1347 chips.
788 This driver only supports the RTC feature, and not other chip
789 features such as alarms.
791 This driver can also be built as a module. If so, the module
792 will be called rtc-ds1347.
794 config RTC_DRV_DS1390
795 tristate "Dallas/Maxim DS1390/93/94"
797 If you say yes here you get support for the
798 Dallas/Maxim DS1390/93/94 chips.
800 This driver supports the RTC feature and trickle charging but not
801 other chip features such as alarms.
803 This driver can also be built as a module. If so, the module
804 will be called rtc-ds1390.
806 config RTC_DRV_MAX6916
807 tristate "Maxim MAX6916"
809 If you say yes here you will get support for the
810 Maxim MAX6916 SPI RTC chip.
812 This driver only supports the RTC feature, and not other chip
813 features such as alarms.
815 This driver can also be built as a module. If so, the module
816 will be called rtc-max6916.
819 tristate "Epson RTC-9701JE"
821 If you say yes here you will get support for the
822 Epson RTC-9701JE SPI RTC chip.
824 This driver can also be built as a module. If so, the module
825 will be called rtc-r9701.
827 config RTC_DRV_RX4581
828 tristate "Epson RX-4581"
830 If you say yes here you will get support for the Epson RX-4581.
832 This driver can also be built as a module. If so the module
833 will be called rtc-rx4581.
835 config RTC_DRV_RS5C348
836 tristate "Ricoh RS5C348A/B"
838 If you say yes here you get support for the
839 Ricoh RS5C348A and RS5C348B RTC chips.
841 This driver can also be built as a module. If so, the module
842 will be called rtc-rs5c348.
844 config RTC_DRV_MAX6902
845 tristate "Maxim MAX6902"
847 If you say yes here you will get support for the
848 Maxim MAX6902 SPI RTC chip.
850 This driver can also be built as a module. If so, the module
851 will be called rtc-max6902.
853 config RTC_DRV_PCF2123
854 tristate "NXP PCF2123"
857 If you say yes here you get support for the NXP PCF2123
860 This driver can also be built as a module. If so, the module
861 will be called rtc-pcf2123.
863 config RTC_DRV_MCP795
864 tristate "Microchip MCP795"
866 If you say yes here you will get support for the Microchip MCP795.
868 This driver can also be built as a module. If so the module
869 will be called rtc-mcp795.
874 # Helper to resolve issues with configs that have SPI enabled but I2C
875 # modular. See SND_SOC_I2C_AND_SPI for more information
877 config RTC_I2C_AND_SPI
881 default y if SPI_MASTER=y
883 comment "SPI and I2C RTC drivers"
885 config RTC_DRV_DS3232
886 tristate "Dallas/Maxim DS3232/DS3234"
887 depends on RTC_I2C_AND_SPI
888 select REGMAP_I2C if I2C
889 select REGMAP_SPI if SPI_MASTER
891 If you say yes here you get support for Dallas Semiconductor
892 DS3232 and DS3234 real-time clock chips. If an interrupt is associated
893 with the device, the alarm functionality is supported.
895 This driver can also be built as a module. If so, the module
896 will be called rtc-ds3232.
898 config RTC_DRV_DS3232_HWMON
899 bool "HWMON support for Dallas/Maxim DS3232/DS3234"
900 depends on RTC_DRV_DS3232 && HWMON && !(RTC_DRV_DS3232=y && HWMON=m)
903 Say Y here if you want to expose temperature sensor data on
906 config RTC_DRV_PCF2127
907 tristate "NXP PCF2127"
908 depends on RTC_I2C_AND_SPI
909 select REGMAP_I2C if I2C
910 select REGMAP_SPI if SPI_MASTER
911 select WATCHDOG_CORE if WATCHDOG
913 If you say yes here you get support for the NXP PCF2127/29 RTC
914 chips with integrated quartz crystal for industrial applications.
915 Both chips also have watchdog timer and tamper switch detection
918 PCF2127 has an additional feature of 512 bytes battery backed
919 memory that's accessible using nvmem interface.
921 This driver can also be built as a module. If so, the module
922 will be called rtc-pcf2127.
924 config RTC_DRV_RV3029C2
925 tristate "Micro Crystal RV3029/3049"
926 depends on RTC_I2C_AND_SPI
927 select REGMAP_I2C if I2C
928 select REGMAP_SPI if SPI_MASTER
930 If you say yes here you get support for the Micro Crystal
931 RV3029 and RV3049 RTC chips.
933 This driver can also be built as a module. If so, the module
934 will be called rtc-rv3029c2.
936 config RTC_DRV_RV3029_HWMON
937 bool "HWMON support for RV3029/3049"
938 depends on RTC_DRV_RV3029C2 && HWMON
939 depends on !(RTC_DRV_RV3029C2=y && HWMON=m)
942 Say Y here if you want to expose temperature sensor data on
945 config RTC_DRV_RX6110
946 tristate "Epson RX-6110"
947 depends on RTC_I2C_AND_SPI
948 select REGMAP_SPI if SPI_MASTER
949 select REGMAP_I2C if I2C
951 If you say yes here you will get support for the Epson RX-6110.
953 This driver can also be built as a module. If so the module
954 will be called rtc-rx6110.
956 comment "Platform RTC drivers"
958 # this 'CMOS' RTC driver is arch dependent because it requires
959 # <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
960 # global rtc_lock ... it's not yet just another platform_device.
963 tristate "PC-style 'CMOS'"
964 depends on X86 || ARM || PPC || MIPS || SPARC64
966 select RTC_MC146818_LIB
968 Say "yes" here to get direct support for the real time clock
969 found in every PC or ACPI-based system, and some other boards.
970 Specifically the original MC146818, compatibles like those in
971 PC south bridges, the DS12887 or M48T86, some multifunction
972 or LPC bus chips, and so on.
974 Your system will need to define the platform device used by
975 this driver, otherwise it won't be accessible. This means
976 you can safely enable this driver if you don't know whether
977 or not your board has this kind of hardware.
979 This driver can also be built as a module. If so, the module
980 will be called rtc-cmos.
983 bool "Alpha PC-style CMOS"
985 select RTC_MC146818_LIB
988 Direct support for the real-time clock found on every Alpha
989 system, specifically MC146818 compatibles. If in doubt, say Y.
991 config RTC_DRV_DS1216
992 tristate "Dallas DS1216"
995 If you say yes here you get support for the Dallas DS1216 RTC chips.
997 config RTC_DRV_DS1286
998 tristate "Dallas DS1286"
1001 If you say yes here you get support for the Dallas DS1286 RTC chips.
1003 config RTC_DRV_DS1511
1004 tristate "Dallas DS1511"
1005 depends on HAS_IOMEM
1007 If you say yes here you get support for the
1008 Dallas DS1511 timekeeping/watchdog chip.
1010 This driver can also be built as a module. If so, the module
1011 will be called rtc-ds1511.
1013 config RTC_DRV_DS1553
1014 tristate "Maxim/Dallas DS1553"
1015 depends on HAS_IOMEM
1017 If you say yes here you get support for the
1018 Maxim/Dallas DS1553 timekeeping chip.
1020 This driver can also be built as a module. If so, the module
1021 will be called rtc-ds1553.
1023 config RTC_DRV_DS1685_FAMILY
1024 tristate "Dallas/Maxim DS1685 Family"
1025 depends on HAS_IOMEM
1027 If you say yes here you get support for the Dallas/Maxim DS1685
1028 family of real time chips. This family includes the DS1685/DS1687,
1029 DS1689/DS1693, DS17285/DS17287, DS17485/DS17487, and
1030 DS17885/DS17887 chips.
1032 This driver can also be built as a module. If so, the module
1033 will be called rtc-ds1685.
1037 depends on RTC_DRV_DS1685_FAMILY
1038 default RTC_DRV_DS1685
1040 config RTC_DRV_DS1685
1041 bool "DS1685/DS1687"
1043 This enables support for the Dallas/Maxim DS1685/DS1687 real time
1046 This chip is commonly found in SGI O2 (IP32) and SGI Octane (IP30)
1047 systems, as well as EPPC-405-UC modules by electronic system design
1050 config RTC_DRV_DS1689
1051 bool "DS1689/DS1693"
1053 This enables support for the Dallas/Maxim DS1689/DS1693 real time
1056 This is an older RTC chip, supplanted by the DS1685/DS1687 above,
1057 which supports a few minor features such as Vcc, Vbat, and Power
1058 Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
1060 It also works for the even older DS1688/DS1691 RTC chips, which are
1061 virtually the same and carry the same model number. Both chips
1062 have 114 bytes of user NVRAM.
1064 config RTC_DRV_DS17285
1065 bool "DS17285/DS17287"
1067 This enables support for the Dallas/Maxim DS17285/DS17287 real time
1070 This chip features 2kb of extended NV-SRAM. It may possibly be
1071 found in some SGI O2 systems (rare).
1073 config RTC_DRV_DS17485
1074 bool "DS17485/DS17487"
1076 This enables support for the Dallas/Maxim DS17485/DS17487 real time
1079 This chip features 4kb of extended NV-SRAM.
1081 config RTC_DRV_DS17885
1082 bool "DS17885/DS17887"
1084 This enables support for the Dallas/Maxim DS17885/DS17887 real time
1087 This chip features 8kb of extended NV-SRAM.
1091 config RTC_DRV_DS1742
1092 tristate "Maxim/Dallas DS1742/1743"
1093 depends on HAS_IOMEM
1095 If you say yes here you get support for the
1096 Maxim/Dallas DS1742/1743 timekeeping chip.
1098 This driver can also be built as a module. If so, the module
1099 will be called rtc-ds1742.
1101 config RTC_DRV_DS2404
1102 tristate "Maxim/Dallas DS2404"
1104 If you say yes here you get support for the
1105 Dallas DS2404 RTC chip.
1107 This driver can also be built as a module. If so, the module
1108 will be called rtc-ds2404.
1110 config RTC_DRV_DA9052
1111 tristate "Dialog DA9052/DA9053 RTC"
1112 depends on PMIC_DA9052
1114 Say y here to support the RTC driver for Dialog Semiconductor
1115 DA9052-BC and DA9053-AA/Bx PMICs.
1117 config RTC_DRV_DA9055
1118 tristate "Dialog Semiconductor DA9055 RTC"
1119 depends on MFD_DA9055
1121 If you say yes here you will get support for the
1122 RTC of the Dialog DA9055 PMIC.
1124 This driver can also be built as a module. If so, the module
1125 will be called rtc-da9055
1127 config RTC_DRV_DA9063
1128 tristate "Dialog Semiconductor DA9063/DA9062 RTC"
1129 depends on MFD_DA9063 || MFD_DA9062
1131 If you say yes here you will get support for the RTC subsystem
1132 for the Dialog Semiconductor PMIC chips DA9063 and DA9062.
1134 This driver can also be built as a module. If so, the module
1135 will be called "rtc-da9063".
1139 depends on EFI && !X86
1141 If you say yes here you will get support for the EFI
1144 This driver can also be built as a module. If so, the module
1145 will be called rtc-efi.
1147 config RTC_DRV_STK17TA8
1148 tristate "Simtek STK17TA8"
1149 depends on HAS_IOMEM
1151 If you say yes here you get support for the
1152 Simtek STK17TA8 timekeeping chip.
1154 This driver can also be built as a module. If so, the module
1155 will be called rtc-stk17ta8.
1157 config RTC_DRV_M48T86
1158 tristate "ST M48T86/Dallas DS12887"
1159 depends on HAS_IOMEM
1161 If you say Y here you will get support for the
1162 ST M48T86 and Dallas DS12887 RTC chips.
1164 This driver can also be built as a module. If so, the module
1165 will be called rtc-m48t86.
1167 config RTC_DRV_M48T35
1168 tristate "ST M48T35"
1169 depends on HAS_IOMEM
1171 If you say Y here you will get support for the
1174 This driver can also be built as a module, if so, the module
1175 will be called "rtc-m48t35".
1177 config RTC_DRV_M48T59
1178 tristate "ST M48T59/M48T08/M48T02"
1179 depends on HAS_IOMEM
1181 If you say Y here you will get support for the
1182 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
1184 These chips are usually found in Sun SPARC and UltraSPARC
1187 This driver can also be built as a module, if so, the module
1188 will be called "rtc-m48t59".
1190 config RTC_DRV_MSM6242
1191 tristate "Oki MSM6242"
1192 depends on HAS_IOMEM
1194 If you say yes here you get support for the Oki MSM6242
1195 timekeeping chip. It is used in some Amiga models (e.g. A2000).
1197 This driver can also be built as a module. If so, the module
1198 will be called rtc-msm6242.
1200 config RTC_DRV_BQ4802
1201 tristate "TI BQ4802"
1202 depends on HAS_IOMEM
1204 If you say Y here you will get support for the TI
1207 This driver can also be built as a module. If so, the module
1208 will be called rtc-bq4802.
1210 config RTC_DRV_RP5C01
1211 tristate "Ricoh RP5C01"
1212 depends on HAS_IOMEM
1214 If you say yes here you get support for the Ricoh RP5C01
1215 timekeeping chip. It is used in some Amiga models (e.g. A3000
1218 This driver can also be built as a module. If so, the module
1219 will be called rtc-rp5c01.
1221 config RTC_DRV_V3020
1222 tristate "EM Microelectronic V3020"
1224 If you say yes here you will get support for the
1225 EM Microelectronic v3020 RTC chip.
1227 This driver can also be built as a module. If so, the module
1228 will be called rtc-v3020.
1230 config RTC_DRV_GAMECUBE
1231 tristate "Nintendo GameCube, Wii and Wii U RTC"
1232 depends on GAMECUBE || WII || COMPILE_TEST
1235 If you say yes here you will get support for the RTC subsystem
1236 of the Nintendo GameCube, Wii and Wii U.
1238 This driver can also be built as a module. If so, the module
1239 will be called "rtc-gamecube".
1241 config RTC_DRV_WM831X
1242 tristate "Wolfson Microelectronics WM831x RTC"
1243 depends on MFD_WM831X
1245 If you say yes here you will get support for the RTC subsystem
1246 of the Wolfson Microelectronics WM831X series PMICs.
1248 This driver can also be built as a module. If so, the module
1249 will be called "rtc-wm831x".
1251 config RTC_DRV_WM8350
1252 tristate "Wolfson Microelectronics WM8350 RTC"
1253 depends on MFD_WM8350
1255 If you say yes here you will get support for the RTC subsystem
1256 of the Wolfson Microelectronics WM8350.
1258 This driver can also be built as a module. If so, the module
1259 will be called "rtc-wm8350".
1261 config RTC_DRV_SC27XX
1262 tristate "Spreadtrum SC27xx RTC"
1263 depends on MFD_SC27XX_PMIC || COMPILE_TEST
1265 If you say Y here you will get support for the RTC subsystem
1266 of the Spreadtrum SC27xx series PMICs. The SC27xx series PMICs
1267 includes the SC2720, SC2721, SC2723, SC2730 and SC2731 chips.
1269 This driver can also be built as a module. If so, the module
1270 will be called rtc-sc27xx.
1272 config RTC_DRV_SPEAR
1273 tristate "SPEAR ST RTC"
1274 depends on PLAT_SPEAR || COMPILE_TEST
1277 If you say Y here you will get support for the RTC found on
1280 config RTC_DRV_PCF50633
1281 depends on MFD_PCF50633
1282 tristate "NXP PCF50633 RTC"
1284 If you say yes here you get support for the RTC subsystem of the
1285 NXP PCF50633 used in embedded systems.
1287 config RTC_DRV_AB8500
1288 tristate "ST-Ericsson AB8500 RTC"
1289 depends on AB8500_CORE
1291 select RTC_INTF_DEV_UIE_EMUL
1293 Select this to enable the ST-Ericsson AB8500 power management IC RTC
1294 support. This chip contains a battery- and capacitor-backed RTC.
1297 tristate "IBM OPAL RTC driver"
1298 depends on PPC_POWERNV
1301 If you say yes here you get support for the PowerNV platform RTC
1302 driver based on OPAL interfaces.
1304 This driver can also be built as a module. If so, the module
1305 will be called rtc-opal.
1307 config RTC_DRV_OPTEE
1308 tristate "OP-TEE based RTC driver"
1311 Select this to get support for OP-TEE based RTC control on SoCs where
1312 RTC are not accessible to the normal world (Linux).
1314 This driver can also be built as a module. If so, the module
1315 will be called rtc-optee.
1317 config RTC_DRV_ZYNQMP
1318 tristate "Xilinx Zynq Ultrascale+ MPSoC RTC"
1319 depends on OF && HAS_IOMEM
1321 If you say yes here you get support for the RTC controller found on
1322 Xilinx Zynq Ultrascale+ MPSoC.
1324 config RTC_DRV_CROS_EC
1325 tristate "Chrome OS EC RTC driver"
1328 If you say yes here you will get support for the
1329 Chrome OS Embedded Controller's RTC.
1331 This driver can also be built as a module. If so, the module
1332 will be called rtc-cros-ec.
1334 config RTC_DRV_NTXEC
1335 tristate "Netronix embedded controller RTC"
1336 depends on MFD_NTXEC
1338 Say yes here if you want to support the RTC functionality of the
1339 embedded controller found in certain e-book readers designed by the
1340 original design manufacturer Netronix.
1342 comment "on-CPU RTC drivers"
1344 config RTC_DRV_ASM9260
1345 tristate "Alphascale asm9260 RTC"
1346 depends on MACH_ASM9260 || COMPILE_TEST
1348 If you say yes here you get support for the RTC on the
1349 Alphascale asm9260 SoC.
1351 This driver can also be built as a module. If so, the module
1352 will be called rtc-asm9260.
1354 config RTC_DRV_DAVINCI
1355 tristate "TI DaVinci RTC"
1356 depends on ARCH_DAVINCI_DM365 || COMPILE_TEST
1358 If you say yes here you get support for the RTC on the
1359 DaVinci platforms (DM365).
1361 This driver can also be built as a module. If so, the module
1362 will be called rtc-davinci.
1364 config RTC_DRV_DIGICOLOR
1365 tristate "Conexant Digicolor RTC"
1366 depends on ARCH_DIGICOLOR || COMPILE_TEST
1368 If you say yes here you get support for the RTC on Conexant
1369 Digicolor platforms. This currently includes the CX92755 SoC.
1371 This driver can also be built as a module. If so, the module
1372 will be called rtc-digicolor.
1374 config RTC_DRV_IMXDI
1375 tristate "Freescale IMX DryIce Real Time Clock"
1379 Support for Freescale IMX DryIce RTC
1381 This driver can also be built as a module, if so, the module
1382 will be called "rtc-imxdi".
1384 config RTC_DRV_FSL_FTM_ALARM
1385 tristate "Freescale FlexTimer alarm timer"
1386 depends on ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST
1388 For the FlexTimer in LS1012A, LS1021A, LS1028A, LS1043A, LS1046A,
1389 LS1088A, LS208xA, we can use FTM as the wakeup source.
1391 Say y here to enable FTM alarm support. The FTM alarm provides
1392 alarm functions for wakeup system from deep sleep.
1394 This driver can also be built as a module, if so, the module
1395 will be called "rtc-fsl-ftm-alarm".
1397 config RTC_DRV_MESON
1398 tristate "Amlogic Meson RTC"
1399 depends on (ARM && ARCH_MESON) || COMPILE_TEST
1402 Support for the RTC block on the Amlogic Meson6, Meson8, Meson8b
1405 This driver can also be built as a module, if so, the module
1406 will be called "rtc-meson".
1408 config RTC_DRV_MESON_VRTC
1409 tristate "Amlogic Meson Virtual RTC"
1410 depends on ARCH_MESON || COMPILE_TEST
1411 default m if ARCH_MESON
1413 If you say yes here you will get support for the
1414 Virtual RTC of Amlogic SoCs.
1416 This driver can also be built as a module. If so, the module
1417 will be called rtc-meson-vrtc.
1420 tristate "TI OMAP Real Time Clock"
1421 depends on ARCH_OMAP || ARCH_DAVINCI || COMPILE_TEST
1424 select GENERIC_PINCONF
1426 Say "yes" here to support the on chip real time clock
1427 present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1429 This driver can also be built as a module, if so, module
1430 will be called rtc-omap.
1433 tristate "Samsung S3C series SoC RTC"
1434 depends on ARCH_EXYNOS || ARCH_S3C64XX || ARCH_S3C24XX || ARCH_S5PV210 || \
1437 RTC (Realtime Clock) driver for the clock inbuilt into the
1438 Samsung S3C24XX series of SoCs. This can provide periodic
1439 interrupt rates from 1Hz to 64Hz for user programs, and
1442 The driver currently supports the common features on all the
1443 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
1446 This driver can also be build as a module. If so, the module
1447 will be called rtc-s3c.
1449 config RTC_DRV_EP93XX
1450 tristate "Cirrus Logic EP93XX"
1451 depends on ARCH_EP93XX || COMPILE_TEST
1453 If you say yes here you get support for the
1454 RTC embedded in the Cirrus Logic EP93XX processors.
1456 This driver can also be built as a module. If so, the module
1457 will be called rtc-ep93xx.
1459 config RTC_DRV_SA1100
1460 tristate "SA11x0/PXA2xx/PXA910"
1461 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
1463 If you say Y here you will get access to the real time clock
1464 built into your SA11x0 or PXA2xx CPU.
1466 To compile this driver as a module, choose M here: the
1467 module will be called rtc-sa1100.
1470 tristate "SuperH On-Chip RTC"
1471 depends on SUPERH || ARCH_RENESAS
1473 Say Y here to enable support for the on-chip RTC found in
1474 most SuperH processors. This RTC is also found in RZ/A SoCs.
1476 To compile this driver as a module, choose M here: the
1477 module will be called rtc-sh.
1479 config RTC_DRV_SUNPLUS
1480 tristate "Sunplus SP7021 RTC"
1481 depends on SOC_SP7021
1483 Say 'yes' to get support for the real-time clock present in
1484 Sunplus SP7021 - a SoC for industrial applications. It provides
1485 RTC status check, timer/alarm functionalities, user data
1486 reservation with the battery over 2.5V, RTC power status check
1489 This driver can also be built as a module. If so, the module
1490 will be called rtc-sunplus.
1492 config RTC_DRV_PL030
1493 tristate "ARM AMBA PL030 RTC"
1496 If you say Y here you will get access to ARM AMBA
1497 PrimeCell PL030 RTC found on certain ARM SOCs.
1499 To compile this driver as a module, choose M here: the
1500 module will be called rtc-pl030.
1502 config RTC_DRV_PL031
1503 tristate "ARM AMBA PL031 RTC"
1506 If you say Y here you will get access to ARM AMBA
1507 PrimeCell PL031 RTC found on certain ARM SOCs.
1509 To compile this driver as a module, choose M here: the
1510 module will be called rtc-pl031.
1512 config RTC_DRV_AT91RM9200
1513 tristate "AT91RM9200 or some AT91SAM9 RTC"
1514 depends on ARCH_AT91 || COMPILE_TEST
1517 Driver for the internal RTC (Realtime Clock) module found on
1518 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
1519 this is powered by the backup power supply.
1521 config RTC_DRV_AT91SAM9
1522 tristate "AT91SAM9 RTT as RTC"
1523 depends on ARCH_AT91 || COMPILE_TEST
1524 depends on OF && HAS_IOMEM
1527 Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
1528 can be used as an RTC thanks to the backup power supply (e.g. a
1529 small coin cell battery) which keeps this block and the GPBR
1530 (General Purpose Backup Registers) block powered when the device
1532 Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
1533 probably want to use the real RTC block instead of the "RTT as an
1536 config RTC_DRV_AU1XXX
1537 tristate "Au1xxx Counter0 RTC support"
1538 depends on MIPS_ALCHEMY
1540 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1541 counter) to be used as a RTC.
1543 This driver can also be built as a module. If so, the module
1544 will be called rtc-au1xxx.
1546 config RTC_DRV_RS5C313
1547 tristate "Ricoh RS5C313"
1548 depends on SH_LANDISK
1550 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1553 tristate "Renesas RZ/N1 RTC"
1554 depends on ARCH_RZN1 || COMPILE_TEST
1555 depends on OF && HAS_IOMEM
1557 If you say yes here you get support for the Renesas RZ/N1 RTC.
1559 config RTC_DRV_GENERIC
1560 tristate "Generic RTC support"
1561 # Please consider writing a new RTC driver instead of using the generic
1563 depends on PARISC || M68K || PPC || SUPERH || COMPILE_TEST
1565 Say Y or M here to enable RTC support on systems using the generic
1566 RTC abstraction. If you do not know what you are doing, you should
1570 tristate "PXA27x/PXA3xx"
1572 select RTC_DRV_SA1100
1574 If you say Y here you will get access to the real time clock
1575 built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs
1576 consisting of an SA1100 compatible RTC and the extended PXA RTC.
1578 This RTC driver uses PXA RTC registers available since pxa27x
1579 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1581 config RTC_DRV_VT8500
1582 tristate "VIA/WonderMedia 85xx SoC RTC"
1583 depends on ARCH_VT8500 || COMPILE_TEST
1585 If you say Y here you will get access to the real time clock
1586 built into your VIA VT8500 SoC or its relatives.
1589 config RTC_DRV_SUN4V
1590 bool "SUN4V Hypervisor RTC"
1593 If you say Y here you will get support for the Hypervisor
1594 based RTC on SUN4V systems.
1596 config RTC_DRV_SUN6I
1597 bool "Allwinner A31 RTC"
1598 default MACH_SUN6I || MACH_SUN8I
1599 depends on COMMON_CLK
1600 depends on ARCH_SUNXI || COMPILE_TEST
1602 If you say Y here you will get support for the RTC found in
1603 some Allwinner SoCs like the A31 or the A64.
1605 config RTC_DRV_SUNXI
1606 tristate "Allwinner sun4i/sun7i RTC"
1607 depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
1609 If you say Y here you will get support for the RTC found on
1612 config RTC_DRV_STARFIRE
1616 If you say Y here you will get support for the RTC found on
1620 tristate "Marvell SoC RTC"
1621 depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST
1623 If you say yes here you will get support for the in-chip RTC
1624 that can be found in some of Marvell's SoC devices, such as
1625 the Kirkwood 88F6281 and 88F6192.
1627 This driver can also be built as a module. If so, the module
1628 will be called rtc-mv.
1630 config RTC_DRV_ARMADA38X
1631 tristate "Armada 38x Marvell SoC RTC"
1632 depends on ARCH_MVEBU || COMPILE_TEST
1635 If you say yes here you will get support for the in-chip RTC
1636 that can be found in the Armada 38x Marvell's SoC device
1638 This driver can also be built as a module. If so, the module
1639 will be called armada38x-rtc.
1641 config RTC_DRV_CADENCE
1642 tristate "Cadence RTC driver"
1643 depends on OF && HAS_IOMEM
1645 If you say Y here you will get access to Cadence RTC IP
1646 found on certain SOCs.
1648 To compile this driver as a module, choose M here: the
1649 module will be called rtc-cadence.
1651 config RTC_DRV_FTRTC010
1652 tristate "Faraday Technology FTRTC010 RTC"
1653 depends on HAS_IOMEM
1656 If you say Y here you will get support for the
1657 Faraday Technolog FTRTC010 found on e.g. Gemini SoC's.
1659 This driver can also be built as a module. If so, the module
1660 will be called rtc-ftrtc010.
1666 If you say yes here you will get support for the RTC on PS3.
1668 This driver can also be built as a module. If so, the module
1669 will be called rtc-ps3.
1672 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1673 depends on ARCH_MXS || COMPILE_TEST
1676 If you say yes here you will get support for the onboard
1677 STMP3xxx/i.MX23/i.MX28 RTC.
1679 This driver can also be built as a module. If so, the module
1680 will be called rtc-stmp3xxx.
1686 If you say Y here you will get support for the RTC found on
1687 the PCAP2 ASIC used on some Motorola phones.
1689 config RTC_DRV_MC13XXX
1690 depends on MFD_MC13XXX
1691 tristate "Freescale MC13xxx RTC"
1693 This enables support for the RTCs found on Freescale's PMICs
1694 MC13783 and MC13892.
1696 config RTC_DRV_MPC5121
1697 tristate "Freescale MPC5121 built-in RTC"
1698 depends on PPC_MPC512x || PPC_MPC52xx
1700 If you say yes here you will get support for the
1701 built-in RTC on MPC5121 or on MPC5200.
1703 This driver can also be built as a module. If so, the module
1704 will be called rtc-mpc5121.
1706 config RTC_DRV_JZ4740
1707 tristate "Ingenic JZ4740 SoC"
1708 depends on MIPS || COMPILE_TEST
1711 If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
1714 This driver can also be built as a module. If so, the module
1715 will be called rtc-jz4740.
1717 config RTC_DRV_LPC24XX
1718 tristate "NXP RTC for LPC178x/18xx/408x/43xx"
1719 depends on ARCH_LPC18XX || COMPILE_TEST
1720 depends on OF && HAS_IOMEM
1722 This enables support for the NXP RTC found which can be found on
1723 NXP LPC178x/18xx/408x/43xx devices.
1725 If you have one of the devices above enable this driver to use
1726 the hardware RTC. This driver can also be built as a module. If
1727 so, the module will be called rtc-lpc24xx.
1729 config RTC_DRV_LPC32XX
1730 depends on ARCH_LPC32XX || COMPILE_TEST
1731 tristate "NXP LPC32XX RTC"
1733 This enables support for the NXP RTC in the LPC32XX
1735 This driver can also be built as a module. If so, the module
1736 will be called rtc-lpc32xx.
1738 config RTC_DRV_PM8XXX
1739 tristate "Qualcomm PMIC8XXX RTC"
1740 depends on MFD_PM8XXX || MFD_SPMI_PMIC || COMPILE_TEST
1742 If you say yes here you get support for the
1743 Qualcomm PMIC8XXX RTC.
1745 To compile this driver as a module, choose M here: the
1746 module will be called rtc-pm8xxx.
1748 config RTC_DRV_TEGRA
1749 tristate "NVIDIA Tegra Internal RTC driver"
1750 depends on ARCH_TEGRA || COMPILE_TEST
1752 If you say yes here you get support for the
1753 Tegra 200 series internal RTC module.
1755 This drive can also be built as a module. If so, the module
1756 will be called rtc-tegra.
1758 config RTC_DRV_LOONGSON1
1759 tristate "loongson1 RTC support"
1760 depends on MACH_LOONGSON32
1762 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1763 counter) to be used as a RTC.
1765 This driver can also be built as a module. If so, the module
1766 will be called rtc-ls1x.
1769 tristate "Freescale MXC Real Time Clock"
1770 depends on ARCH_MXC || COMPILE_TEST
1771 depends on HAS_IOMEM
1774 If you say yes here you get support for the Freescale MXC
1777 This driver can also be built as a module, if so, the module
1778 will be called "rtc-mxc".
1780 config RTC_DRV_MXC_V2
1781 tristate "Freescale MXC Real Time Clock for i.MX53"
1782 depends on ARCH_MXC || COMPILE_TEST
1783 depends on HAS_IOMEM
1786 If you say yes here you get support for the Freescale MXC
1787 SRTC module in i.MX53 processor.
1789 This driver can also be built as a module, if so, the module
1790 will be called "rtc-mxc_v2".
1793 tristate "Freescale SNVS RTC support"
1795 depends on ARCH_MXC || COMPILE_TEST
1796 depends on HAS_IOMEM
1799 If you say yes here you get support for the Freescale SNVS
1800 Low Power (LP) RTC module.
1802 This driver can also be built as a module, if so, the module
1803 will be called "rtc-snvs".
1805 config RTC_DRV_IMX_SC
1807 depends on HAVE_ARM_SMCCC
1808 tristate "NXP i.MX System Controller RTC support"
1810 If you say yes here you get support for the NXP i.MX System
1811 Controller RTC module.
1813 config RTC_DRV_ST_LPC
1814 tristate "STMicroelectronics LPC RTC"
1818 Say Y here to include STMicroelectronics Low Power Controller
1819 (LPC) based RTC support.
1821 To compile this driver as a module, choose M here: the
1822 module will be called rtc-st-lpc.
1824 config RTC_DRV_MOXART
1825 tristate "MOXA ART RTC"
1826 depends on ARCH_MOXART || COMPILE_TEST
1828 If you say yes here you get support for the MOXA ART
1831 This driver can also be built as a module. If so, the module
1832 will be called rtc-moxart
1834 config RTC_DRV_MT2712
1835 tristate "MediaTek MT2712 SoC based RTC"
1836 depends on ARCH_MEDIATEK || COMPILE_TEST
1838 This enables support for the real time clock built in the MediaTek
1841 This drive can also be built as a module. If so, the module
1842 will be called rtc-mt2712.
1844 config RTC_DRV_MT6397
1845 tristate "MediaTek PMIC based RTC"
1846 depends on MFD_MT6397 || (COMPILE_TEST && IRQ_DOMAIN)
1848 This selects the MediaTek(R) RTC driver. RTC is part of MediaTek
1849 MT6397 PMIC. You should enable MT6397 PMIC MFD before select
1850 MediaTek(R) RTC driver.
1852 If you want to use MediaTek(R) RTC interface, select Y or M here.
1854 config RTC_DRV_MT7622
1855 tristate "MediaTek SoC based RTC"
1856 depends on ARCH_MEDIATEK || COMPILE_TEST
1858 This enables support for the real time clock built in the MediaTek
1861 This drive can also be built as a module. If so, the module
1862 will be called rtc-mt7622.
1864 config RTC_DRV_XGENE
1865 tristate "APM X-Gene RTC"
1866 depends on HAS_IOMEM
1867 depends on ARCH_XGENE || COMPILE_TEST
1869 If you say yes here you get support for the APM X-Gene SoC real time
1872 This driver can also be built as a module, if so, the module
1873 will be called "rtc-xgene".
1875 config RTC_DRV_PIC32
1876 tristate "Microchip PIC32 RTC"
1877 depends on MACH_PIC32
1880 If you say yes here you get support for the PIC32 RTC module.
1882 This driver can also be built as a module. If so, the module
1883 will be called rtc-pic32
1885 config RTC_DRV_R7301
1886 tristate "EPSON TOYOCOM RTC-7301SF/DG"
1888 depends on OF && HAS_IOMEM
1890 If you say yes here you get support for the EPSON TOYOCOM
1891 RTC-7301SF/DG chips.
1893 This driver can also be built as a module. If so, the module
1894 will be called rtc-r7301.
1896 config RTC_DRV_STM32
1897 tristate "STM32 RTC"
1899 depends on ARCH_STM32 || COMPILE_TEST
1901 If you say yes here you get support for the STM32 On-Chip
1904 This driver can also be built as a module, if so, the module
1905 will be called "rtc-stm32".
1907 config RTC_DRV_CPCAP
1908 depends on MFD_CPCAP
1909 tristate "Motorola CPCAP RTC"
1911 Say y here for CPCAP rtc found on some Motorola phones
1912 and tablets such as Droid 4.
1914 config RTC_DRV_RTD119X
1915 bool "Realtek RTD129x RTC"
1916 depends on ARCH_REALTEK || COMPILE_TEST
1917 default ARCH_REALTEK
1919 If you say yes here, you get support for the RTD1295 SoC
1922 config RTC_DRV_ASPEED
1923 tristate "ASPEED RTC"
1925 depends on ARCH_ASPEED || COMPILE_TEST
1927 If you say yes here you get support for the ASPEED BMC SoC real time
1930 This driver can also be built as a module, if so, the module
1931 will be called "rtc-aspeed".
1933 config RTC_DRV_TI_K3
1934 tristate "TI K3 RTC"
1935 depends on ARCH_K3 || COMPILE_TEST
1938 If you say yes here you get support for the Texas Instruments's
1939 Real Time Clock for K3 architecture.
1941 This driver can also be built as a module, if so, the module
1942 will be called "rtc-ti-k3".
1944 comment "HID Sensor RTC drivers"
1946 config RTC_DRV_HID_SENSOR_TIME
1947 tristate "HID Sensor Time"
1949 depends on HID_SENSOR_HUB && IIO
1950 select HID_SENSOR_IIO_COMMON
1952 Say yes here to build support for the HID Sensors of type Time.
1953 This drivers makes such sensors available as RTCs.
1955 If this driver is compiled as a module, it will be named
1956 rtc-hid-sensor-time.
1958 config RTC_DRV_GOLDFISH
1959 tristate "Goldfish Real Time Clock"
1960 depends on HAS_IOMEM
1962 Say yes to enable RTC driver for the Goldfish based virtual platform.
1964 Goldfish is a code name for the virtual platform developed by Google
1965 for Android emulation.
1967 config RTC_DRV_WILCO_EC
1968 tristate "Wilco EC RTC"
1972 If you say yes here, you get read/write support for the Real Time
1973 Clock on the Wilco Embedded Controller (Wilco is a kind of Chromebook)
1975 This can also be built as a module. If so, the module will
1976 be named "rtc_wilco_ec".
1978 config RTC_DRV_MSC313
1979 tristate "MStar MSC313 RTC"
1980 depends on ARCH_MSTARV7 || COMPILE_TEST
1982 If you say yes here you get support for the Mstar MSC313e On-Chip
1985 This driver can also be built as a module, if so, the module
1986 will be called "rtc-msc313".
1988 config RTC_DRV_POLARFIRE_SOC
1989 tristate "Microchip PolarFire SoC built-in RTC"
1990 depends on SOC_MICROCHIP_POLARFIRE
1992 If you say yes here you will get support for the
1993 built-in RTC on Polarfire SoC.
1995 This driver can also be built as a module, if so, the module
1996 will be called "rtc-mpfs".