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"
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_TWL92330
544 bool "TI TWL92330/Menelaus"
547 If you say yes here you get support for the RTC on the
548 TWL92330 "Menelaus" power management chip, used with OMAP2
549 platforms. The support is integrated with the rest of
550 the Menelaus driver; it's not separate module.
552 config RTC_DRV_TWL4030
553 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
554 depends on TWL4030_CORE
557 If you say yes here you get support for the RTC on the
558 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
560 This driver can also be built as a module. If so, the module
561 will be called rtc-twl.
563 config RTC_DRV_PALMAS
564 tristate "TI Palmas RTC driver"
565 depends on MFD_PALMAS
567 If you say yes here you get support for the RTC of TI PALMA series PMIC
570 This driver can also be built as a module. If so, the module
571 will be called rtc-palma.
573 config RTC_DRV_TPS6586X
574 tristate "TI TPS6586X RTC driver"
575 depends on MFD_TPS6586X
577 TI Power Management IC TPS6586X supports RTC functionality
578 along with alarm. This driver supports the RTC driver for
579 the TPS6586X RTC module.
581 config RTC_DRV_TPS65910
582 tristate "TI TPS65910 RTC driver"
583 depends on MFD_TPS65910
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-tps65910.
591 config RTC_DRV_RC5T583
592 tristate "RICOH 5T583 RTC driver"
593 depends on MFD_RC5T583
595 If you say yes here you get support for the RTC on the
598 This driver can also be built as a module. If so, the module
599 will be called rtc-rc5t583.
601 config RTC_DRV_RC5T619
602 tristate "RICOH RC5T619 RTC driver"
603 depends on MFD_RN5T618
605 If you say yes here you get support for the RTC on the
608 This driver can also be built as a module. If so, the module
609 will be called rtc-rc5t619.
611 config RTC_DRV_S35390A
612 tristate "Seiko Instruments S-35390A"
615 If you say yes here you will get support for the Seiko
616 Instruments S-35390A.
618 This driver can also be built as a module. If so the module
619 will be called rtc-s35390a.
621 config RTC_DRV_FM3130
622 tristate "Ramtron FM3130"
624 If you say Y here you will get support for the
625 Ramtron FM3130 RTC chips.
626 Ramtron FM3130 is a chip with two separate devices inside,
627 RTC clock and FRAM. This driver provides only RTC functionality.
629 This driver can also be built as a module. If so the module
630 will be called rtc-fm3130.
632 config RTC_DRV_RX8010
633 tristate "Epson RX8010SJ"
636 If you say yes here you get support for the Epson RX8010SJ RTC
639 This driver can also be built as a module. If so, the module
640 will be called rtc-rx8010.
642 config RTC_DRV_RX8581
643 tristate "Epson RX-8571/RX-8581"
646 If you say yes here you will get support for the Epson RX-8571/
649 This driver can also be built as a module. If so the module
650 will be called rtc-rx8581.
652 config RTC_DRV_RX8025
653 tristate "Epson RX-8025SA/NB"
655 If you say yes here you get support for the Epson
656 RX-8025SA/NB RTC chips.
658 This driver can also be built as a module. If so, the module
659 will be called rtc-rx8025.
661 config RTC_DRV_EM3027
662 tristate "EM Microelectronic EM3027"
664 If you say yes here you get support for the EM
665 Microelectronic EM3027 RTC chips.
667 This driver can also be built as a module. If so, the module
668 will be called rtc-em3027.
670 config RTC_DRV_RV3028
671 tristate "Micro Crystal RV3028"
674 If you say yes here you get support for the Micro Crystal
677 This driver can also be built as a module. If so, the module
678 will be called rtc-rv3028.
680 config RTC_DRV_RV3032
681 tristate "Micro Crystal RV3032"
684 If you say yes here you get support for the Micro Crystal
687 This driver can also be built as a module. If so, the module
688 will be called rtc-rv3032.
690 config RTC_DRV_RV8803
691 tristate "Micro Crystal RV8803, Epson RX8900"
693 If you say yes here you get support for the Micro Crystal RV8803 and
694 Epson RX8900 RTC chips.
696 This driver can also be built as a module. If so, the module
697 will be called rtc-rv8803.
700 tristate "Samsung S2M/S5M series"
701 depends on MFD_SEC_CORE || COMPILE_TEST
705 If you say yes here you will get support for the
706 RTC of Samsung S2MPS14 and S5M PMIC series.
708 This driver can also be built as a module. If so, the module
709 will be called rtc-s5m.
711 config RTC_DRV_SD3078
712 tristate "ZXW Shenzhen whwave SD3078"
715 If you say yes here you get support for the ZXW Shenzhen whwave
718 This driver can also be built as a module. If so, the module
719 will be called rtc-sd3078
723 comment "SPI RTC drivers"
727 config RTC_DRV_M41T93
730 If you say yes here you will get support for the
731 ST M41T93 SPI RTC chip.
733 This driver can also be built as a module. If so, the module
734 will be called rtc-m41t93.
736 config RTC_DRV_M41T94
739 If you say yes here you will get support for the
740 ST M41T94 SPI RTC chip.
742 This driver can also be built as a module. If so, the module
743 will be called rtc-m41t94.
745 config RTC_DRV_DS1302
746 tristate "Dallas/Maxim DS1302"
749 If you say yes here you get support for the Dallas DS1302 RTC chips.
751 This driver can also be built as a module. If so, the module
752 will be called rtc-ds1302.
754 config RTC_DRV_DS1305
755 tristate "Dallas/Maxim DS1305/DS1306"
757 Select this driver to get support for the Dallas/Maxim DS1305
758 and DS1306 real time clock chips. These support a trickle
759 charger, alarms, and NVRAM in addition to the clock.
761 This driver can also be built as a module. If so, the module
762 will be called rtc-ds1305.
764 config RTC_DRV_DS1343
766 tristate "Dallas/Maxim DS1343/DS1344"
768 If you say yes here you get support for the
769 Dallas/Maxim DS1343 and DS1344 real time clock chips.
770 Support for trickle charger, alarm is provided.
772 This driver can also be built as a module. If so, the module
773 will be called rtc-ds1343.
775 config RTC_DRV_DS1347
777 tristate "Dallas/Maxim DS1347"
779 If you say yes here you get support for the
780 Dallas/Maxim DS1347 chips.
782 This driver only supports the RTC feature, and not other chip
783 features such as alarms.
785 This driver can also be built as a module. If so, the module
786 will be called rtc-ds1347.
788 config RTC_DRV_DS1390
789 tristate "Dallas/Maxim DS1390/93/94"
791 If you say yes here you get support for the
792 Dallas/Maxim DS1390/93/94 chips.
794 This driver supports the RTC feature and trickle charging but not
795 other chip features such as alarms.
797 This driver can also be built as a module. If so, the module
798 will be called rtc-ds1390.
800 config RTC_DRV_MAX6916
801 tristate "Maxim MAX6916"
803 If you say yes here you will get support for the
804 Maxim MAX6916 SPI RTC chip.
806 This driver only supports the RTC feature, and not other chip
807 features such as alarms.
809 This driver can also be built as a module. If so, the module
810 will be called rtc-max6916.
813 tristate "Epson RTC-9701JE"
815 If you say yes here you will get support for the
816 Epson RTC-9701JE SPI RTC chip.
818 This driver can also be built as a module. If so, the module
819 will be called rtc-r9701.
821 config RTC_DRV_RX4581
822 tristate "Epson RX-4581"
824 If you say yes here you will get support for the Epson RX-4581.
826 This driver can also be built as a module. If so the module
827 will be called rtc-rx4581.
829 config RTC_DRV_RS5C348
830 tristate "Ricoh RS5C348A/B"
832 If you say yes here you get support for the
833 Ricoh RS5C348A and RS5C348B RTC chips.
835 This driver can also be built as a module. If so, the module
836 will be called rtc-rs5c348.
838 config RTC_DRV_MAX6902
839 tristate "Maxim MAX6902"
841 If you say yes here you will get support for the
842 Maxim MAX6902 SPI RTC chip.
844 This driver can also be built as a module. If so, the module
845 will be called rtc-max6902.
847 config RTC_DRV_PCF2123
848 tristate "NXP PCF2123"
851 If you say yes here you get support for the NXP PCF2123
854 This driver can also be built as a module. If so, the module
855 will be called rtc-pcf2123.
857 config RTC_DRV_MCP795
858 tristate "Microchip MCP795"
860 If you say yes here you will get support for the Microchip MCP795.
862 This driver can also be built as a module. If so the module
863 will be called rtc-mcp795.
868 # Helper to resolve issues with configs that have SPI enabled but I2C
869 # modular. See SND_SOC_I2C_AND_SPI for more information
871 config RTC_I2C_AND_SPI
875 default y if SPI_MASTER=y
877 comment "SPI and I2C RTC drivers"
879 config RTC_DRV_DS3232
880 tristate "Dallas/Maxim DS3232/DS3234"
881 depends on RTC_I2C_AND_SPI
882 select REGMAP_I2C if I2C
883 select REGMAP_SPI if SPI_MASTER
885 If you say yes here you get support for Dallas Semiconductor
886 DS3232 and DS3234 real-time clock chips. If an interrupt is associated
887 with the device, the alarm functionality is supported.
889 This driver can also be built as a module. If so, the module
890 will be called rtc-ds3232.
892 config RTC_DRV_DS3232_HWMON
893 bool "HWMON support for Dallas/Maxim DS3232/DS3234"
894 depends on RTC_DRV_DS3232 && HWMON && !(RTC_DRV_DS3232=y && HWMON=m)
897 Say Y here if you want to expose temperature sensor data on
900 config RTC_DRV_PCF2127
901 tristate "NXP PCF2127"
902 depends on RTC_I2C_AND_SPI
903 select REGMAP_I2C if I2C
904 select REGMAP_SPI if SPI_MASTER
905 select WATCHDOG_CORE if WATCHDOG
907 If you say yes here you get support for the NXP PCF2127/29 RTC
908 chips with integrated quartz crystal for industrial applications.
909 Both chips also have watchdog timer and tamper switch detection
912 PCF2127 has an additional feature of 512 bytes battery backed
913 memory that's accessible using nvmem interface.
915 This driver can also be built as a module. If so, the module
916 will be called rtc-pcf2127.
918 config RTC_DRV_RV3029C2
919 tristate "Micro Crystal RV3029/3049"
920 depends on RTC_I2C_AND_SPI
921 select REGMAP_I2C if I2C
922 select REGMAP_SPI if SPI_MASTER
924 If you say yes here you get support for the Micro Crystal
925 RV3029 and RV3049 RTC chips.
927 This driver can also be built as a module. If so, the module
928 will be called rtc-rv3029c2.
930 config RTC_DRV_RV3029_HWMON
931 bool "HWMON support for RV3029/3049"
932 depends on RTC_DRV_RV3029C2 && HWMON
933 depends on !(RTC_DRV_RV3029C2=y && HWMON=m)
936 Say Y here if you want to expose temperature sensor data on
939 config RTC_DRV_RX6110
940 tristate "Epson RX-6110"
941 depends on RTC_I2C_AND_SPI
942 select REGMAP_SPI if SPI_MASTER
943 select REGMAP_I2C if I2C
945 If you say yes here you will get support for the Epson RX-6110.
947 This driver can also be built as a module. If so the module
948 will be called rtc-rx6110.
950 comment "Platform RTC drivers"
952 # this 'CMOS' RTC driver is arch dependent because it requires
953 # <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
954 # global rtc_lock ... it's not yet just another platform_device.
957 tristate "PC-style 'CMOS'"
958 depends on X86 || ARM || PPC || MIPS || SPARC64
959 depends on HAS_IOPORT || MACH_DECSTATION
961 select RTC_MC146818_LIB
963 Say "yes" here to get direct support for the real time clock
964 found in every PC or ACPI-based system, and some other boards.
965 Specifically the original MC146818, compatibles like those in
966 PC south bridges, the DS12887 or M48T86, some multifunction
967 or LPC bus chips, and so on.
969 Your system will need to define the platform device used by
970 this driver, otherwise it won't be accessible. This means
971 you can safely enable this driver if you don't know whether
972 or not your board has this kind of hardware.
974 This driver can also be built as a module. If so, the module
975 will be called rtc-cmos.
978 bool "Alpha PC-style CMOS"
980 depends on HAS_IOPORT
981 select RTC_MC146818_LIB
984 Direct support for the real-time clock found on every Alpha
985 system, specifically MC146818 compatibles. If in doubt, say Y.
987 config RTC_DRV_DS1216
988 tristate "Dallas DS1216"
991 If you say yes here you get support for the Dallas DS1216 RTC chips.
993 config RTC_DRV_DS1286
994 tristate "Dallas DS1286"
997 If you say yes here you get support for the Dallas DS1286 RTC chips.
999 config RTC_DRV_DS1511
1000 tristate "Dallas DS1511"
1001 depends on HAS_IOMEM
1003 If you say yes here you get support for the
1004 Dallas DS1511 timekeeping/watchdog chip.
1006 This driver can also be built as a module. If so, the module
1007 will be called rtc-ds1511.
1009 config RTC_DRV_DS1553
1010 tristate "Maxim/Dallas DS1553"
1011 depends on HAS_IOMEM
1013 If you say yes here you get support for the
1014 Maxim/Dallas DS1553 timekeeping chip.
1016 This driver can also be built as a module. If so, the module
1017 will be called rtc-ds1553.
1019 config RTC_DRV_DS1685_FAMILY
1020 tristate "Dallas/Maxim DS1685 Family"
1021 depends on HAS_IOMEM
1023 If you say yes here you get support for the Dallas/Maxim DS1685
1024 family of real time chips. This family includes the DS1685/DS1687,
1025 DS1689/DS1693, DS17285/DS17287, DS17485/DS17487, and
1026 DS17885/DS17887 chips.
1028 This driver can also be built as a module. If so, the module
1029 will be called rtc-ds1685.
1033 depends on RTC_DRV_DS1685_FAMILY
1034 default RTC_DRV_DS1685
1036 config RTC_DRV_DS1685
1037 bool "DS1685/DS1687"
1039 This enables support for the Dallas/Maxim DS1685/DS1687 real time
1042 This chip is commonly found in SGI O2 (IP32) and SGI Octane (IP30)
1043 systems, as well as EPPC-405-UC modules by electronic system design
1046 config RTC_DRV_DS1689
1047 bool "DS1689/DS1693"
1049 This enables support for the Dallas/Maxim DS1689/DS1693 real time
1052 This is an older RTC chip, supplanted by the DS1685/DS1687 above,
1053 which supports a few minor features such as Vcc, Vbat, and Power
1054 Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
1056 It also works for the even older DS1688/DS1691 RTC chips, which are
1057 virtually the same and carry the same model number. Both chips
1058 have 114 bytes of user NVRAM.
1060 config RTC_DRV_DS17285
1061 bool "DS17285/DS17287"
1063 This enables support for the Dallas/Maxim DS17285/DS17287 real time
1066 This chip features 2kb of extended NV-SRAM. It may possibly be
1067 found in some SGI O2 systems (rare).
1069 config RTC_DRV_DS17485
1070 bool "DS17485/DS17487"
1072 This enables support for the Dallas/Maxim DS17485/DS17487 real time
1075 This chip features 4kb of extended NV-SRAM.
1077 config RTC_DRV_DS17885
1078 bool "DS17885/DS17887"
1080 This enables support for the Dallas/Maxim DS17885/DS17887 real time
1083 This chip features 8kb of extended NV-SRAM.
1087 config RTC_DRV_DS1742
1088 tristate "Maxim/Dallas DS1742/1743"
1089 depends on HAS_IOMEM
1091 If you say yes here you get support for the
1092 Maxim/Dallas DS1742/1743 timekeeping chip.
1094 This driver can also be built as a module. If so, the module
1095 will be called rtc-ds1742.
1097 config RTC_DRV_DS2404
1098 tristate "Maxim/Dallas DS2404"
1100 If you say yes here you get support for the
1101 Dallas DS2404 RTC chip.
1103 This driver can also be built as a module. If so, the module
1104 will be called rtc-ds2404.
1106 config RTC_DRV_DA9052
1107 tristate "Dialog DA9052/DA9053 RTC"
1108 depends on PMIC_DA9052
1110 Say y here to support the RTC driver for Dialog Semiconductor
1111 DA9052-BC and DA9053-AA/Bx PMICs.
1113 config RTC_DRV_DA9055
1114 tristate "Dialog Semiconductor DA9055 RTC"
1115 depends on MFD_DA9055
1117 If you say yes here you will get support for the
1118 RTC of the Dialog DA9055 PMIC.
1120 This driver can also be built as a module. If so, the module
1121 will be called rtc-da9055
1123 config RTC_DRV_DA9063
1124 tristate "Dialog Semiconductor DA9063/DA9062 RTC"
1125 depends on MFD_DA9063 || MFD_DA9062
1127 If you say yes here you will get support for the RTC subsystem
1128 for the Dialog Semiconductor PMIC chips DA9063 and DA9062.
1130 This driver can also be built as a module. If so, the module
1131 will be called "rtc-da9063".
1135 depends on EFI && !X86
1137 If you say yes here you will get support for the EFI
1140 This driver can also be built as a module. If so, the module
1141 will be called rtc-efi.
1143 config RTC_DRV_STK17TA8
1144 tristate "Simtek STK17TA8"
1145 depends on HAS_IOMEM
1147 If you say yes here you get support for the
1148 Simtek STK17TA8 timekeeping chip.
1150 This driver can also be built as a module. If so, the module
1151 will be called rtc-stk17ta8.
1153 config RTC_DRV_M48T86
1154 tristate "ST M48T86/Dallas DS12887"
1155 depends on HAS_IOMEM
1157 If you say Y here you will get support for the
1158 ST M48T86 and Dallas DS12887 RTC chips.
1160 This driver can also be built as a module. If so, the module
1161 will be called rtc-m48t86.
1163 config RTC_DRV_M48T35
1164 tristate "ST M48T35"
1165 depends on HAS_IOMEM
1167 If you say Y here you will get support for the
1170 This driver can also be built as a module, if so, the module
1171 will be called "rtc-m48t35".
1173 config RTC_DRV_M48T59
1174 tristate "ST M48T59/M48T08/M48T02"
1175 depends on HAS_IOMEM
1177 If you say Y here you will get support for the
1178 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
1180 These chips are usually found in Sun SPARC and UltraSPARC
1183 This driver can also be built as a module, if so, the module
1184 will be called "rtc-m48t59".
1186 config RTC_DRV_MSM6242
1187 tristate "Oki MSM6242"
1188 depends on HAS_IOMEM
1190 If you say yes here you get support for the Oki MSM6242
1191 timekeeping chip. It is used in some Amiga models (e.g. A2000).
1193 This driver can also be built as a module. If so, the module
1194 will be called rtc-msm6242.
1196 config RTC_DRV_BQ4802
1197 tristate "TI BQ4802"
1198 depends on HAS_IOMEM && HAS_IOPORT
1200 If you say Y here you will get support for the TI
1203 This driver can also be built as a module. If so, the module
1204 will be called rtc-bq4802.
1206 config RTC_DRV_RP5C01
1207 tristate "Ricoh RP5C01"
1208 depends on HAS_IOMEM
1210 If you say yes here you get support for the Ricoh RP5C01
1211 timekeeping chip. It is used in some Amiga models (e.g. A3000
1214 This driver can also be built as a module. If so, the module
1215 will be called rtc-rp5c01.
1217 config RTC_DRV_GAMECUBE
1218 tristate "Nintendo GameCube, Wii and Wii U RTC"
1219 depends on GAMECUBE || WII || COMPILE_TEST
1222 If you say yes here you will get support for the RTC subsystem
1223 of the Nintendo GameCube, Wii and Wii U.
1225 This driver can also be built as a module. If so, the module
1226 will be called "rtc-gamecube".
1228 config RTC_DRV_WM831X
1229 tristate "Wolfson Microelectronics WM831x RTC"
1230 depends on MFD_WM831X
1232 If you say yes here you will get support for the RTC subsystem
1233 of the Wolfson Microelectronics WM831X series PMICs.
1235 This driver can also be built as a module. If so, the module
1236 will be called "rtc-wm831x".
1238 config RTC_DRV_WM8350
1239 tristate "Wolfson Microelectronics WM8350 RTC"
1240 depends on MFD_WM8350
1242 If you say yes here you will get support for the RTC subsystem
1243 of the Wolfson Microelectronics WM8350.
1245 This driver can also be built as a module. If so, the module
1246 will be called "rtc-wm8350".
1248 config RTC_DRV_SC27XX
1249 tristate "Spreadtrum SC27xx RTC"
1250 depends on MFD_SC27XX_PMIC || COMPILE_TEST
1252 If you say Y here you will get support for the RTC subsystem
1253 of the Spreadtrum SC27xx series PMICs. The SC27xx series PMICs
1254 includes the SC2720, SC2721, SC2723, SC2730 and SC2731 chips.
1256 This driver can also be built as a module. If so, the module
1257 will be called rtc-sc27xx.
1259 config RTC_DRV_SPEAR
1260 tristate "SPEAR ST RTC"
1261 depends on PLAT_SPEAR || COMPILE_TEST
1264 If you say Y here you will get support for the RTC found on
1267 config RTC_DRV_PCF50633
1268 depends on MFD_PCF50633
1269 tristate "NXP PCF50633 RTC"
1271 If you say yes here you get support for the RTC subsystem of the
1272 NXP PCF50633 used in embedded systems.
1274 config RTC_DRV_AB8500
1275 tristate "ST-Ericsson AB8500 RTC"
1276 depends on AB8500_CORE
1278 select RTC_INTF_DEV_UIE_EMUL
1280 Select this to enable the ST-Ericsson AB8500 power management IC RTC
1281 support. This chip contains a battery- and capacitor-backed RTC.
1284 tristate "IBM OPAL RTC driver"
1285 depends on PPC_POWERNV
1288 If you say yes here you get support for the PowerNV platform RTC
1289 driver based on OPAL interfaces.
1291 This driver can also be built as a module. If so, the module
1292 will be called rtc-opal.
1294 config RTC_DRV_OPTEE
1295 tristate "OP-TEE based RTC driver"
1298 Select this to get support for OP-TEE based RTC control on SoCs where
1299 RTC are not accessible to the normal world (Linux).
1301 This driver can also be built as a module. If so, the module
1302 will be called rtc-optee.
1304 config RTC_DRV_ZYNQMP
1305 tristate "Xilinx Zynq Ultrascale+ MPSoC RTC"
1306 depends on OF && HAS_IOMEM
1308 If you say yes here you get support for the RTC controller found on
1309 Xilinx Zynq Ultrascale+ MPSoC.
1311 config RTC_DRV_CROS_EC
1312 tristate "Chrome OS EC RTC driver"
1315 If you say yes here you will get support for the
1316 Chrome OS Embedded Controller's RTC.
1318 This driver can also be built as a module. If so, the module
1319 will be called rtc-cros-ec.
1321 config RTC_DRV_NTXEC
1322 tristate "Netronix embedded controller RTC"
1323 depends on MFD_NTXEC
1325 Say yes here if you want to support the RTC functionality of the
1326 embedded controller found in certain e-book readers designed by the
1327 original design manufacturer Netronix.
1329 comment "on-CPU RTC drivers"
1331 config RTC_DRV_ASM9260
1332 tristate "Alphascale asm9260 RTC"
1333 depends on MACH_ASM9260 || COMPILE_TEST
1335 If you say yes here you get support for the RTC on the
1336 Alphascale asm9260 SoC.
1338 This driver can also be built as a module. If so, the module
1339 will be called rtc-asm9260.
1341 config RTC_DRV_DIGICOLOR
1342 tristate "Conexant Digicolor RTC"
1343 depends on ARCH_DIGICOLOR || COMPILE_TEST
1345 If you say yes here you get support for the RTC on Conexant
1346 Digicolor platforms. This currently includes the CX92755 SoC.
1348 This driver can also be built as a module. If so, the module
1349 will be called rtc-digicolor.
1351 config RTC_DRV_IMXDI
1352 tristate "Freescale IMX DryIce Real Time Clock"
1356 Support for Freescale IMX DryIce RTC
1358 This driver can also be built as a module, if so, the module
1359 will be called "rtc-imxdi".
1361 config RTC_DRV_FSL_FTM_ALARM
1362 tristate "Freescale FlexTimer alarm timer"
1363 depends on ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST
1365 For the FlexTimer in LS1012A, LS1021A, LS1028A, LS1043A, LS1046A,
1366 LS1088A, LS208xA, we can use FTM as the wakeup source.
1368 Say y here to enable FTM alarm support. The FTM alarm provides
1369 alarm functions for wakeup system from deep sleep.
1371 This driver can also be built as a module, if so, the module
1372 will be called "rtc-fsl-ftm-alarm".
1374 config RTC_DRV_MESON
1375 tristate "Amlogic Meson RTC"
1376 depends on (ARM && ARCH_MESON) || COMPILE_TEST
1379 Support for the RTC block on the Amlogic Meson6, Meson8, Meson8b
1382 This driver can also be built as a module, if so, the module
1383 will be called "rtc-meson".
1385 config RTC_DRV_MESON_VRTC
1386 tristate "Amlogic Meson Virtual RTC"
1387 depends on ARCH_MESON || COMPILE_TEST
1388 default m if ARCH_MESON
1390 If you say yes here you will get support for the
1391 Virtual RTC of Amlogic SoCs.
1393 This driver can also be built as a module. If so, the module
1394 will be called rtc-meson-vrtc.
1397 tristate "TI OMAP Real Time Clock"
1398 depends on ARCH_OMAP || ARCH_DAVINCI || COMPILE_TEST
1401 select GENERIC_PINCONF
1403 Say "yes" here to support the on chip real time clock
1404 present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1406 This driver can also be built as a module, if so, module
1407 will be called rtc-omap.
1410 tristate "Samsung S3C series SoC RTC"
1411 depends on ARCH_EXYNOS || ARCH_S3C64XX || ARCH_S5PV210 || \
1414 RTC (Realtime Clock) driver for the clock inbuilt into the
1415 Samsung S3C64XX series of SoCs. This can provide periodic
1416 interrupt rates from 1Hz to 64Hz for user programs, and
1419 This driver can also be build as a module. If so, the module
1420 will be called rtc-s3c.
1422 config RTC_DRV_EP93XX
1423 tristate "Cirrus Logic EP93XX"
1424 depends on ARCH_EP93XX || COMPILE_TEST
1426 If you say yes here you get support for the
1427 RTC embedded in the Cirrus Logic EP93XX processors.
1429 This driver can also be built as a module. If so, the module
1430 will be called rtc-ep93xx.
1432 config RTC_DRV_SA1100
1433 tristate "SA11x0/PXA2xx/PXA910"
1434 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
1436 If you say Y here you will get access to the real time clock
1437 built into your SA11x0 or PXA2xx CPU.
1439 To compile this driver as a module, choose M here: the
1440 module will be called rtc-sa1100.
1443 tristate "SuperH On-Chip RTC"
1444 depends on SUPERH || ARCH_RENESAS
1446 Say Y here to enable support for the on-chip RTC found in
1447 most SuperH processors. This RTC is also found in RZ/A SoCs.
1449 To compile this driver as a module, choose M here: the
1450 module will be called rtc-sh.
1452 config RTC_DRV_SUNPLUS
1453 tristate "Sunplus SP7021 RTC"
1454 depends on SOC_SP7021
1456 Say 'yes' to get support for the real-time clock present in
1457 Sunplus SP7021 - a SoC for industrial applications. It provides
1458 RTC status check, timer/alarm functionalities, user data
1459 reservation with the battery over 2.5V, RTC power status check
1462 This driver can also be built as a module. If so, the module
1463 will be called rtc-sunplus.
1465 config RTC_DRV_PL030
1466 tristate "ARM AMBA PL030 RTC"
1469 If you say Y here you will get access to ARM AMBA
1470 PrimeCell PL030 RTC found on certain ARM SOCs.
1472 To compile this driver as a module, choose M here: the
1473 module will be called rtc-pl030.
1475 config RTC_DRV_PL031
1476 tristate "ARM AMBA PL031 RTC"
1479 If you say Y here you will get access to ARM AMBA
1480 PrimeCell PL031 RTC found on certain ARM SOCs.
1482 To compile this driver as a module, choose M here: the
1483 module will be called rtc-pl031.
1485 config RTC_DRV_AT91RM9200
1486 tristate "AT91RM9200 or some AT91SAM9 RTC"
1487 depends on ARCH_AT91 || COMPILE_TEST
1490 Driver for the internal RTC (Realtime Clock) module found on
1491 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
1492 this is powered by the backup power supply.
1494 config RTC_DRV_AT91SAM9
1495 tristate "AT91SAM9 RTT as RTC"
1496 depends on ARCH_AT91 || COMPILE_TEST
1497 depends on OF && HAS_IOMEM
1500 Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
1501 can be used as an RTC thanks to the backup power supply (e.g. a
1502 small coin cell battery) which keeps this block and the GPBR
1503 (General Purpose Backup Registers) block powered when the device
1505 Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
1506 probably want to use the real RTC block instead of the "RTT as an
1509 config RTC_DRV_AU1XXX
1510 tristate "Au1xxx Counter0 RTC support"
1511 depends on MIPS_ALCHEMY
1513 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1514 counter) to be used as a RTC.
1516 This driver can also be built as a module. If so, the module
1517 will be called rtc-au1xxx.
1519 config RTC_DRV_RS5C313
1520 tristate "Ricoh RS5C313"
1521 depends on SH_LANDISK
1523 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1526 tristate "Renesas RZ/N1 RTC"
1527 depends on ARCH_RZN1 || COMPILE_TEST
1528 depends on OF && HAS_IOMEM
1530 If you say yes here you get support for the Renesas RZ/N1 RTC.
1532 config RTC_DRV_GENERIC
1533 tristate "Generic RTC support"
1534 # Please consider writing a new RTC driver instead of using the generic
1536 depends on PARISC || M68K || PPC || SUPERH || COMPILE_TEST
1538 Say Y or M here to enable RTC support on systems using the generic
1539 RTC abstraction. If you do not know what you are doing, you should
1543 tristate "PXA27x/PXA3xx"
1545 select RTC_DRV_SA1100
1547 If you say Y here you will get access to the real time clock
1548 built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs
1549 consisting of an SA1100 compatible RTC and the extended PXA RTC.
1551 This RTC driver uses PXA RTC registers available since pxa27x
1552 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1554 config RTC_DRV_VT8500
1555 tristate "VIA/WonderMedia 85xx SoC RTC"
1556 depends on ARCH_VT8500 || COMPILE_TEST
1558 If you say Y here you will get access to the real time clock
1559 built into your VIA VT8500 SoC or its relatives.
1562 config RTC_DRV_SUN4V
1563 bool "SUN4V Hypervisor RTC"
1566 If you say Y here you will get support for the Hypervisor
1567 based RTC on SUN4V systems.
1569 config RTC_DRV_SUN6I
1570 bool "Allwinner A31 RTC"
1571 default MACH_SUN6I || MACH_SUN8I
1572 depends on COMMON_CLK
1573 depends on ARCH_SUNXI || COMPILE_TEST
1575 If you say Y here you will get support for the RTC found in
1576 some Allwinner SoCs like the A31 or the A64.
1578 config RTC_DRV_SUNXI
1579 tristate "Allwinner sun4i/sun7i RTC"
1580 depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
1582 If you say Y here you will get support for the RTC found on
1585 config RTC_DRV_STARFIRE
1589 If you say Y here you will get support for the RTC found on
1593 tristate "Marvell SoC RTC"
1594 depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST
1596 If you say yes here you will get support for the in-chip RTC
1597 that can be found in some of Marvell's SoC devices, such as
1598 the Kirkwood 88F6281 and 88F6192.
1600 This driver can also be built as a module. If so, the module
1601 will be called rtc-mv.
1603 config RTC_DRV_ARMADA38X
1604 tristate "Armada 38x Marvell SoC RTC"
1605 depends on ARCH_MVEBU || COMPILE_TEST
1608 If you say yes here you will get support for the in-chip RTC
1609 that can be found in the Armada 38x Marvell's SoC device
1611 This driver can also be built as a module. If so, the module
1612 will be called armada38x-rtc.
1614 config RTC_DRV_CADENCE
1615 tristate "Cadence RTC driver"
1616 depends on OF && HAS_IOMEM
1618 If you say Y here you will get access to Cadence RTC IP
1619 found on certain SOCs.
1621 To compile this driver as a module, choose M here: the
1622 module will be called rtc-cadence.
1624 config RTC_DRV_FTRTC010
1625 tristate "Faraday Technology FTRTC010 RTC"
1626 depends on HAS_IOMEM
1629 If you say Y here you will get support for the
1630 Faraday Technolog FTRTC010 found on e.g. Gemini SoC's.
1632 This driver can also be built as a module. If so, the module
1633 will be called rtc-ftrtc010.
1639 If you say yes here you will get support for the RTC on PS3.
1641 This driver can also be built as a module. If so, the module
1642 will be called rtc-ps3.
1645 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1646 depends on ARCH_MXS || COMPILE_TEST
1649 If you say yes here you will get support for the onboard
1650 STMP3xxx/i.MX23/i.MX28 RTC.
1652 This driver can also be built as a module. If so, the module
1653 will be called rtc-stmp3xxx.
1659 If you say Y here you will get support for the RTC found on
1660 the PCAP2 ASIC used on some Motorola phones.
1662 config RTC_DRV_MC13XXX
1663 depends on MFD_MC13XXX
1664 tristate "Freescale MC13xxx RTC"
1666 This enables support for the RTCs found on Freescale's PMICs
1667 MC13783 and MC13892.
1669 config RTC_DRV_MPC5121
1670 tristate "Freescale MPC5121 built-in RTC"
1671 depends on PPC_MPC512x || PPC_MPC52xx
1673 If you say yes here you will get support for the
1674 built-in RTC on MPC5121 or on MPC5200.
1676 This driver can also be built as a module. If so, the module
1677 will be called rtc-mpc5121.
1679 config RTC_DRV_JZ4740
1680 tristate "Ingenic JZ4740 SoC"
1681 depends on MIPS || COMPILE_TEST
1682 depends on OF && COMMON_CLK
1684 If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
1687 This driver can also be built as a module. If so, the module
1688 will be called rtc-jz4740.
1690 config RTC_DRV_LOONGSON
1691 tristate "Loongson On-chip RTC"
1692 depends on MACH_LOONGSON32 || MACH_LOONGSON64 || COMPILE_TEST
1695 This is a driver for the Loongson on-chip Counter0 (Time-Of-Year
1696 counter) to be used as a RTC.
1697 It can be found on Loongson-1 series cpu, Loongson-2K series cpu
1698 and Loongson LS7A bridge chips.
1700 This driver can also be built as a module. If so, the module
1701 will be called rtc-loongson.
1703 config RTC_DRV_LPC24XX
1704 tristate "NXP RTC for LPC178x/18xx/408x/43xx"
1705 depends on ARCH_LPC18XX || COMPILE_TEST
1706 depends on OF && HAS_IOMEM
1708 This enables support for the NXP RTC found which can be found on
1709 NXP LPC178x/18xx/408x/43xx devices.
1711 If you have one of the devices above enable this driver to use
1712 the hardware RTC. This driver can also be built as a module. If
1713 so, the module will be called rtc-lpc24xx.
1715 config RTC_DRV_LPC32XX
1716 depends on ARCH_LPC32XX || COMPILE_TEST
1717 tristate "NXP LPC32XX RTC"
1719 This enables support for the NXP RTC in the LPC32XX
1721 This driver can also be built as a module. If so, the module
1722 will be called rtc-lpc32xx.
1724 config RTC_DRV_PM8XXX
1725 tristate "Qualcomm PMIC8XXX RTC"
1726 depends on MFD_PM8XXX || MFD_SPMI_PMIC || COMPILE_TEST
1728 If you say yes here you get support for the
1729 Qualcomm PMIC8XXX RTC.
1731 To compile this driver as a module, choose M here: the
1732 module will be called rtc-pm8xxx.
1734 config RTC_DRV_TEGRA
1735 tristate "NVIDIA Tegra Internal RTC driver"
1736 depends on ARCH_TEGRA || COMPILE_TEST
1738 If you say yes here you get support for the
1739 Tegra 200 series internal RTC module.
1741 This drive can also be built as a module. If so, the module
1742 will be called rtc-tegra.
1745 tristate "Freescale MXC Real Time Clock"
1746 depends on ARCH_MXC || COMPILE_TEST
1747 depends on HAS_IOMEM
1750 If you say yes here you get support for the Freescale MXC
1753 This driver can also be built as a module, if so, the module
1754 will be called "rtc-mxc".
1756 config RTC_DRV_MXC_V2
1757 tristate "Freescale MXC Real Time Clock for i.MX53"
1758 depends on ARCH_MXC || COMPILE_TEST
1759 depends on HAS_IOMEM
1762 If you say yes here you get support for the Freescale MXC
1763 SRTC module in i.MX53 processor.
1765 This driver can also be built as a module, if so, the module
1766 will be called "rtc-mxc_v2".
1769 tristate "Freescale SNVS RTC support"
1771 depends on ARCH_MXC || COMPILE_TEST
1772 depends on HAS_IOMEM
1775 If you say yes here you get support for the Freescale SNVS
1776 Low Power (LP) RTC module.
1778 This driver can also be built as a module, if so, the module
1779 will be called "rtc-snvs".
1781 config RTC_DRV_BBNSM
1782 tristate "NXP BBNSM RTC support"
1784 depends on ARCH_MXC || COMPILE_TEST
1785 depends on HAS_IOMEM
1788 If you say yes here you get support for the NXP BBNSM RTC module.
1790 This driver can also be built as a module, if so, the module
1791 will be called "rtc-bbnsm".
1793 config RTC_DRV_IMX_SC
1795 depends on HAVE_ARM_SMCCC
1796 tristate "NXP i.MX System Controller RTC support"
1798 If you say yes here you get support for the NXP i.MX System
1799 Controller RTC module.
1801 config RTC_DRV_ST_LPC
1802 tristate "STMicroelectronics LPC RTC"
1806 Say Y here to include STMicroelectronics Low Power Controller
1807 (LPC) based RTC support.
1809 To compile this driver as a module, choose M here: the
1810 module will be called rtc-st-lpc.
1812 config RTC_DRV_MOXART
1813 tristate "MOXA ART RTC"
1814 depends on ARCH_MOXART || COMPILE_TEST
1816 If you say yes here you get support for the MOXA ART
1819 This driver can also be built as a module. If so, the module
1820 will be called rtc-moxart
1822 config RTC_DRV_MT2712
1823 tristate "MediaTek MT2712 SoC based RTC"
1824 depends on ARCH_MEDIATEK || COMPILE_TEST
1826 This enables support for the real time clock built in the MediaTek
1829 This drive can also be built as a module. If so, the module
1830 will be called rtc-mt2712.
1832 config RTC_DRV_MT6397
1833 tristate "MediaTek PMIC based RTC"
1834 depends on MFD_MT6397 || (COMPILE_TEST && IRQ_DOMAIN)
1836 This selects the MediaTek(R) RTC driver. RTC is part of MediaTek
1837 MT6397 PMIC. You should enable MT6397 PMIC MFD before select
1838 MediaTek(R) RTC driver.
1840 If you want to use MediaTek(R) RTC interface, select Y or M here.
1842 config RTC_DRV_MT7622
1843 tristate "MediaTek SoC based RTC"
1844 depends on ARCH_MEDIATEK || COMPILE_TEST
1846 This enables support for the real time clock built in the MediaTek
1849 This drive can also be built as a module. If so, the module
1850 will be called rtc-mt7622.
1852 config RTC_DRV_XGENE
1853 tristate "APM X-Gene RTC"
1854 depends on HAS_IOMEM
1855 depends on ARCH_XGENE || COMPILE_TEST
1857 If you say yes here you get support for the APM X-Gene SoC real time
1860 This driver can also be built as a module, if so, the module
1861 will be called "rtc-xgene".
1863 config RTC_DRV_PIC32
1864 tristate "Microchip PIC32 RTC"
1865 depends on MACH_PIC32
1868 If you say yes here you get support for the PIC32 RTC module.
1870 This driver can also be built as a module. If so, the module
1871 will be called rtc-pic32
1873 config RTC_DRV_R7301
1874 tristate "EPSON TOYOCOM RTC-7301SF/DG"
1876 depends on OF && HAS_IOMEM
1878 If you say yes here you get support for the EPSON TOYOCOM
1879 RTC-7301SF/DG chips.
1881 This driver can also be built as a module. If so, the module
1882 will be called rtc-r7301.
1884 config RTC_DRV_STM32
1885 tristate "STM32 RTC"
1887 depends on ARCH_STM32 || COMPILE_TEST
1889 If you say yes here you get support for the STM32 On-Chip
1892 This driver can also be built as a module, if so, the module
1893 will be called "rtc-stm32".
1895 config RTC_DRV_CPCAP
1896 depends on MFD_CPCAP
1897 tristate "Motorola CPCAP RTC"
1899 Say y here for CPCAP rtc found on some Motorola phones
1900 and tablets such as Droid 4.
1902 config RTC_DRV_RTD119X
1903 bool "Realtek RTD129x RTC"
1904 depends on ARCH_REALTEK || COMPILE_TEST
1905 default ARCH_REALTEK
1907 If you say yes here, you get support for the RTD1295 SoC
1910 config RTC_DRV_ASPEED
1911 tristate "ASPEED RTC"
1913 depends on ARCH_ASPEED || COMPILE_TEST
1915 If you say yes here you get support for the ASPEED BMC SoC real time
1918 This driver can also be built as a module, if so, the module
1919 will be called "rtc-aspeed".
1921 config RTC_DRV_TI_K3
1922 tristate "TI K3 RTC"
1923 depends on ARCH_K3 || COMPILE_TEST
1926 If you say yes here you get support for the Texas Instruments's
1927 Real Time Clock for K3 architecture.
1929 This driver can also be built as a module, if so, the module
1930 will be called "rtc-ti-k3".
1932 comment "HID Sensor RTC drivers"
1934 config RTC_DRV_HID_SENSOR_TIME
1935 tristate "HID Sensor Time"
1937 depends on HID_SENSOR_HUB && IIO
1938 select HID_SENSOR_IIO_COMMON
1940 Say yes here to build support for the HID Sensors of type Time.
1941 This drivers makes such sensors available as RTCs.
1943 If this driver is compiled as a module, it will be named
1944 rtc-hid-sensor-time.
1946 config RTC_DRV_GOLDFISH
1947 tristate "Goldfish Real Time Clock"
1948 depends on HAS_IOMEM
1950 Say yes to enable RTC driver for the Goldfish based virtual platform.
1952 Goldfish is a code name for the virtual platform developed by Google
1953 for Android emulation.
1955 config RTC_DRV_WILCO_EC
1956 tristate "Wilco EC RTC"
1960 If you say yes here, you get read/write support for the Real Time
1961 Clock on the Wilco Embedded Controller (Wilco is a kind of Chromebook)
1963 This can also be built as a module. If so, the module will
1964 be named "rtc_wilco_ec".
1966 config RTC_DRV_MSC313
1967 tristate "MStar MSC313 RTC"
1968 depends on ARCH_MSTARV7 || COMPILE_TEST
1970 If you say yes here you get support for the Mstar MSC313e On-Chip
1973 This driver can also be built as a module, if so, the module
1974 will be called "rtc-msc313".
1976 config RTC_DRV_POLARFIRE_SOC
1977 tristate "Microchip PolarFire SoC built-in RTC"
1978 depends on ARCH_MICROCHIP_POLARFIRE
1980 If you say yes here you will get support for the
1981 built-in RTC on Polarfire SoC.
1983 This driver can also be built as a module, if so, the module
1984 will be called "rtc-mpfs".