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"
427 If you say yes here you get support for the
428 Intersil ISL12022 RTC chip.
430 This driver can also be built as a module. If so, the module
431 will be called rtc-isl12022.
433 config RTC_DRV_ISL12026
434 tristate "Intersil ISL12026"
435 depends on OF || COMPILE_TEST
437 If you say yes here you get support for the
438 Intersil ISL12026 RTC chip.
440 This driver can also be built as a module. If so, the module
441 will be called rtc-isl12026.
444 tristate "Xicor/Intersil X1205"
446 If you say yes here you get support for the
447 Xicor/Intersil X1205 RTC chip.
449 This driver can also be built as a module. If so, the module
450 will be called rtc-x1205.
452 config RTC_DRV_PCF8523
453 tristate "NXP PCF8523"
456 If you say yes here you get support for the NXP PCF8523 RTC
459 This driver can also be built as a module. If so, the module
460 will be called rtc-pcf8523.
462 config RTC_DRV_PCF85063
463 tristate "NXP PCF85063"
466 If you say yes here you get support for the PCF85063 RTC chip
468 This driver can also be built as a module. If so, the module
469 will be called rtc-pcf85063.
471 config RTC_DRV_PCF85363
472 tristate "NXP PCF85363"
475 If you say yes here you get support for the PCF85363 RTC chip.
477 This driver can also be built as a module. If so, the module
478 will be called rtc-pcf85363.
480 The nvmem interface will be named pcf85363-#, where # is the
481 zero-based instance number.
483 config RTC_DRV_PCF8563
484 tristate "Philips PCF8563/Epson RTC8564"
486 If you say yes here you get support for the
487 Philips PCF8563 RTC chip. The Epson RTC8564
490 This driver can also be built as a module. If so, the module
491 will be called rtc-pcf8563.
493 config RTC_DRV_PCF8583
494 tristate "Philips PCF8583"
496 If you say yes here you get support for the Philips PCF8583
497 RTC chip found on Acorn RiscPCs. This driver supports the
498 platform specific method of retrieving the current year from
499 the RTC's SRAM. It will work on other platforms with the same
500 chip, but the year will probably have to be tweaked.
502 This driver can also be built as a module. If so, the module
503 will be called rtc-pcf8583.
505 config RTC_DRV_M41T80
506 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible"
508 If you say Y here you will get support for the ST M41T60
509 and M41T80 RTC chips series. Currently, the following chips are
510 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
511 M41ST85, M41ST87, and MicroCrystal RV4162.
513 This driver can also be built as a module. If so, the module
514 will be called rtc-m41t80.
516 config RTC_DRV_M41T80_WDT
517 bool "ST M41T65/M41T80 series RTC watchdog timer"
518 depends on RTC_DRV_M41T80
520 If you say Y here you will get support for the
521 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
523 config RTC_DRV_BD70528
524 tristate "ROHM BD71815 and BD71828 PMIC RTC"
525 depends on MFD_ROHM_BD71828
527 If you say Y here you will get support for the RTC
528 block on ROHM BD71815 and BD71828 Power Management IC.
530 This driver can also be built as a module. If so, the module
531 will be called rtc-bd70528.
534 tristate "TI BQ32000"
536 If you say Y here you will get support for the TI
537 BQ32000 I2C RTC chip.
539 This driver can also be built as a module. If so, the module
540 will be called rtc-bq32k.
542 config RTC_DRV_DM355EVM
543 tristate "TI DaVinci DM355 EVM RTC"
544 depends on MFD_DM355EVM_MSP
546 Supports the RTC firmware in the MSP430 on the DM355 EVM.
548 config RTC_DRV_TWL92330
549 bool "TI TWL92330/Menelaus"
552 If you say yes here you get support for the RTC on the
553 TWL92330 "Menelaus" power management chip, used with OMAP2
554 platforms. The support is integrated with the rest of
555 the Menelaus driver; it's not separate module.
557 config RTC_DRV_TWL4030
558 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
559 depends on TWL4030_CORE
562 If you say yes here you get support for the RTC on the
563 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
565 This driver can also be built as a module. If so, the module
566 will be called rtc-twl.
568 config RTC_DRV_PALMAS
569 tristate "TI Palmas RTC driver"
570 depends on MFD_PALMAS
572 If you say yes here you get support for the RTC of TI PALMA series PMIC
575 This driver can also be built as a module. If so, the module
576 will be called rtc-palma.
578 config RTC_DRV_TPS6586X
579 tristate "TI TPS6586X RTC driver"
580 depends on MFD_TPS6586X
582 TI Power Management IC TPS6586X supports RTC functionality
583 along with alarm. This driver supports the RTC driver for
584 the TPS6586X RTC module.
586 config RTC_DRV_TPS65910
587 tristate "TI TPS65910 RTC driver"
588 depends on MFD_TPS65910
590 If you say yes here you get support for the RTC on the
593 This driver can also be built as a module. If so, the module
594 will be called rtc-tps65910.
596 config RTC_DRV_RC5T583
597 tristate "RICOH 5T583 RTC driver"
598 depends on MFD_RC5T583
600 If you say yes here you get support for the RTC on the
603 This driver can also be built as a module. If so, the module
604 will be called rtc-rc5t583.
606 config RTC_DRV_RC5T619
607 tristate "RICOH RC5T619 RTC driver"
608 depends on MFD_RN5T618
610 If you say yes here you get support for the RTC on the
613 This driver can also be built as a module. If so, the module
614 will be called rtc-rc5t619.
616 config RTC_DRV_S35390A
617 tristate "Seiko Instruments S-35390A"
620 If you say yes here you will get support for the Seiko
621 Instruments S-35390A.
623 This driver can also be built as a module. If so the module
624 will be called rtc-s35390a.
626 config RTC_DRV_FM3130
627 tristate "Ramtron FM3130"
629 If you say Y here you will get support for the
630 Ramtron FM3130 RTC chips.
631 Ramtron FM3130 is a chip with two separate devices inside,
632 RTC clock and FRAM. This driver provides only RTC functionality.
634 This driver can also be built as a module. If so the module
635 will be called rtc-fm3130.
637 config RTC_DRV_RX8010
638 tristate "Epson RX8010SJ"
641 If you say yes here you get support for the Epson RX8010SJ RTC
644 This driver can also be built as a module. If so, the module
645 will be called rtc-rx8010.
647 config RTC_DRV_RX8581
648 tristate "Epson RX-8571/RX-8581"
651 If you say yes here you will get support for the Epson RX-8571/
654 This driver can also be built as a module. If so the module
655 will be called rtc-rx8581.
657 config RTC_DRV_RX8025
658 tristate "Epson RX-8025SA/NB"
660 If you say yes here you get support for the Epson
661 RX-8025SA/NB RTC chips.
663 This driver can also be built as a module. If so, the module
664 will be called rtc-rx8025.
666 config RTC_DRV_EM3027
667 tristate "EM Microelectronic EM3027"
669 If you say yes here you get support for the EM
670 Microelectronic EM3027 RTC chips.
672 This driver can also be built as a module. If so, the module
673 will be called rtc-em3027.
675 config RTC_DRV_RV3028
676 tristate "Micro Crystal RV3028"
679 If you say yes here you get support for the Micro Crystal
682 This driver can also be built as a module. If so, the module
683 will be called rtc-rv3028.
685 config RTC_DRV_RV3032
686 tristate "Micro Crystal RV3032"
689 If you say yes here you get support for the Micro Crystal
692 This driver can also be built as a module. If so, the module
693 will be called rtc-rv3032.
695 config RTC_DRV_RV8803
696 tristate "Micro Crystal RV8803, Epson RX8900"
698 If you say yes here you get support for the Micro Crystal RV8803 and
699 Epson RX8900 RTC chips.
701 This driver can also be built as a module. If so, the module
702 will be called rtc-rv8803.
705 tristate "Samsung S2M/S5M series"
706 depends on MFD_SEC_CORE || COMPILE_TEST
710 If you say yes here you will get support for the
711 RTC of Samsung S2MPS14 and S5M PMIC series.
713 This driver can also be built as a module. If so, the module
714 will be called rtc-s5m.
716 config RTC_DRV_SD3078
717 tristate "ZXW Shenzhen whwave SD3078"
720 If you say yes here you get support for the ZXW Shenzhen whwave
723 This driver can also be built as a module. If so, the module
724 will be called rtc-sd3078
728 comment "SPI RTC drivers"
732 config RTC_DRV_M41T93
735 If you say yes here you will get support for the
736 ST M41T93 SPI RTC chip.
738 This driver can also be built as a module. If so, the module
739 will be called rtc-m41t93.
741 config RTC_DRV_M41T94
744 If you say yes here you will get support for the
745 ST M41T94 SPI RTC chip.
747 This driver can also be built as a module. If so, the module
748 will be called rtc-m41t94.
750 config RTC_DRV_DS1302
751 tristate "Dallas/Maxim DS1302"
754 If you say yes here you get support for the Dallas DS1302 RTC chips.
756 This driver can also be built as a module. If so, the module
757 will be called rtc-ds1302.
759 config RTC_DRV_DS1305
760 tristate "Dallas/Maxim DS1305/DS1306"
762 Select this driver to get support for the Dallas/Maxim DS1305
763 and DS1306 real time clock chips. These support a trickle
764 charger, alarms, and NVRAM in addition to the clock.
766 This driver can also be built as a module. If so, the module
767 will be called rtc-ds1305.
769 config RTC_DRV_DS1343
771 tristate "Dallas/Maxim DS1343/DS1344"
773 If you say yes here you get support for the
774 Dallas/Maxim DS1343 and DS1344 real time clock chips.
775 Support for trickle charger, alarm is provided.
777 This driver can also be built as a module. If so, the module
778 will be called rtc-ds1343.
780 config RTC_DRV_DS1347
782 tristate "Dallas/Maxim DS1347"
784 If you say yes here you get support for the
785 Dallas/Maxim DS1347 chips.
787 This driver only supports the RTC feature, and not other chip
788 features such as alarms.
790 This driver can also be built as a module. If so, the module
791 will be called rtc-ds1347.
793 config RTC_DRV_DS1390
794 tristate "Dallas/Maxim DS1390/93/94"
796 If you say yes here you get support for the
797 Dallas/Maxim DS1390/93/94 chips.
799 This driver supports the RTC feature and trickle charging but not
800 other chip features such as alarms.
802 This driver can also be built as a module. If so, the module
803 will be called rtc-ds1390.
805 config RTC_DRV_MAX6916
806 tristate "Maxim MAX6916"
808 If you say yes here you will get support for the
809 Maxim MAX6916 SPI RTC chip.
811 This driver only supports the RTC feature, and not other chip
812 features such as alarms.
814 This driver can also be built as a module. If so, the module
815 will be called rtc-max6916.
818 tristate "Epson RTC-9701JE"
820 If you say yes here you will get support for the
821 Epson RTC-9701JE SPI RTC chip.
823 This driver can also be built as a module. If so, the module
824 will be called rtc-r9701.
826 config RTC_DRV_RX4581
827 tristate "Epson RX-4581"
829 If you say yes here you will get support for the Epson RX-4581.
831 This driver can also be built as a module. If so the module
832 will be called rtc-rx4581.
834 config RTC_DRV_RS5C348
835 tristate "Ricoh RS5C348A/B"
837 If you say yes here you get support for the
838 Ricoh RS5C348A and RS5C348B RTC chips.
840 This driver can also be built as a module. If so, the module
841 will be called rtc-rs5c348.
843 config RTC_DRV_MAX6902
844 tristate "Maxim MAX6902"
846 If you say yes here you will get support for the
847 Maxim MAX6902 SPI RTC chip.
849 This driver can also be built as a module. If so, the module
850 will be called rtc-max6902.
852 config RTC_DRV_PCF2123
853 tristate "NXP PCF2123"
856 If you say yes here you get support for the NXP PCF2123
859 This driver can also be built as a module. If so, the module
860 will be called rtc-pcf2123.
862 config RTC_DRV_MCP795
863 tristate "Microchip MCP795"
865 If you say yes here you will get support for the Microchip MCP795.
867 This driver can also be built as a module. If so the module
868 will be called rtc-mcp795.
873 # Helper to resolve issues with configs that have SPI enabled but I2C
874 # modular. See SND_SOC_I2C_AND_SPI for more information
876 config RTC_I2C_AND_SPI
880 default y if SPI_MASTER=y
882 comment "SPI and I2C RTC drivers"
884 config RTC_DRV_DS3232
885 tristate "Dallas/Maxim DS3232/DS3234"
886 depends on RTC_I2C_AND_SPI
887 select REGMAP_I2C if I2C
888 select REGMAP_SPI if SPI_MASTER
890 If you say yes here you get support for Dallas Semiconductor
891 DS3232 and DS3234 real-time clock chips. If an interrupt is associated
892 with the device, the alarm functionality is supported.
894 This driver can also be built as a module. If so, the module
895 will be called rtc-ds3232.
897 config RTC_DRV_DS3232_HWMON
898 bool "HWMON support for Dallas/Maxim DS3232/DS3234"
899 depends on RTC_DRV_DS3232 && HWMON && !(RTC_DRV_DS3232=y && HWMON=m)
902 Say Y here if you want to expose temperature sensor data on
905 config RTC_DRV_PCF2127
906 tristate "NXP PCF2127"
907 depends on RTC_I2C_AND_SPI
908 select REGMAP_I2C if I2C
909 select REGMAP_SPI if SPI_MASTER
910 select WATCHDOG_CORE if WATCHDOG
912 If you say yes here you get support for the NXP PCF2127/29 RTC
913 chips with integrated quartz crystal for industrial applications.
914 Both chips also have watchdog timer and tamper switch detection
917 PCF2127 has an additional feature of 512 bytes battery backed
918 memory that's accessible using nvmem interface.
920 This driver can also be built as a module. If so, the module
921 will be called rtc-pcf2127.
923 config RTC_DRV_RV3029C2
924 tristate "Micro Crystal RV3029/3049"
925 depends on RTC_I2C_AND_SPI
926 select REGMAP_I2C if I2C
927 select REGMAP_SPI if SPI_MASTER
929 If you say yes here you get support for the Micro Crystal
930 RV3029 and RV3049 RTC chips.
932 This driver can also be built as a module. If so, the module
933 will be called rtc-rv3029c2.
935 config RTC_DRV_RV3029_HWMON
936 bool "HWMON support for RV3029/3049"
937 depends on RTC_DRV_RV3029C2 && HWMON
938 depends on !(RTC_DRV_RV3029C2=y && HWMON=m)
941 Say Y here if you want to expose temperature sensor data on
944 config RTC_DRV_RX6110
945 tristate "Epson RX-6110"
946 depends on RTC_I2C_AND_SPI
947 select REGMAP_SPI if SPI_MASTER
948 select REGMAP_I2C if I2C
950 If you say yes here you will get support for the Epson RX-6110.
952 This driver can also be built as a module. If so the module
953 will be called rtc-rx6110.
955 comment "Platform RTC drivers"
957 # this 'CMOS' RTC driver is arch dependent because it requires
958 # <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
959 # global rtc_lock ... it's not yet just another platform_device.
962 tristate "PC-style 'CMOS'"
963 depends on X86 || ARM || PPC || MIPS || SPARC64
965 select RTC_MC146818_LIB
967 Say "yes" here to get direct support for the real time clock
968 found in every PC or ACPI-based system, and some other boards.
969 Specifically the original MC146818, compatibles like those in
970 PC south bridges, the DS12887 or M48T86, some multifunction
971 or LPC bus chips, and so on.
973 Your system will need to define the platform device used by
974 this driver, otherwise it won't be accessible. This means
975 you can safely enable this driver if you don't know whether
976 or not your board has this kind of hardware.
978 This driver can also be built as a module. If so, the module
979 will be called rtc-cmos.
982 bool "Alpha PC-style CMOS"
984 select RTC_MC146818_LIB
987 Direct support for the real-time clock found on every Alpha
988 system, specifically MC146818 compatibles. If in doubt, say Y.
990 config RTC_DRV_DS1216
991 tristate "Dallas DS1216"
994 If you say yes here you get support for the Dallas DS1216 RTC chips.
996 config RTC_DRV_DS1286
997 tristate "Dallas DS1286"
1000 If you say yes here you get support for the Dallas DS1286 RTC chips.
1002 config RTC_DRV_DS1511
1003 tristate "Dallas DS1511"
1004 depends on HAS_IOMEM
1006 If you say yes here you get support for the
1007 Dallas DS1511 timekeeping/watchdog chip.
1009 This driver can also be built as a module. If so, the module
1010 will be called rtc-ds1511.
1012 config RTC_DRV_DS1553
1013 tristate "Maxim/Dallas DS1553"
1014 depends on HAS_IOMEM
1016 If you say yes here you get support for the
1017 Maxim/Dallas DS1553 timekeeping chip.
1019 This driver can also be built as a module. If so, the module
1020 will be called rtc-ds1553.
1022 config RTC_DRV_DS1685_FAMILY
1023 tristate "Dallas/Maxim DS1685 Family"
1024 depends on HAS_IOMEM
1026 If you say yes here you get support for the Dallas/Maxim DS1685
1027 family of real time chips. This family includes the DS1685/DS1687,
1028 DS1689/DS1693, DS17285/DS17287, DS17485/DS17487, and
1029 DS17885/DS17887 chips.
1031 This driver can also be built as a module. If so, the module
1032 will be called rtc-ds1685.
1036 depends on RTC_DRV_DS1685_FAMILY
1037 default RTC_DRV_DS1685
1039 config RTC_DRV_DS1685
1040 bool "DS1685/DS1687"
1042 This enables support for the Dallas/Maxim DS1685/DS1687 real time
1045 This chip is commonly found in SGI O2 (IP32) and SGI Octane (IP30)
1046 systems, as well as EPPC-405-UC modules by electronic system design
1049 config RTC_DRV_DS1689
1050 bool "DS1689/DS1693"
1052 This enables support for the Dallas/Maxim DS1689/DS1693 real time
1055 This is an older RTC chip, supplanted by the DS1685/DS1687 above,
1056 which supports a few minor features such as Vcc, Vbat, and Power
1057 Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
1059 It also works for the even older DS1688/DS1691 RTC chips, which are
1060 virtually the same and carry the same model number. Both chips
1061 have 114 bytes of user NVRAM.
1063 config RTC_DRV_DS17285
1064 bool "DS17285/DS17287"
1066 This enables support for the Dallas/Maxim DS17285/DS17287 real time
1069 This chip features 2kb of extended NV-SRAM. It may possibly be
1070 found in some SGI O2 systems (rare).
1072 config RTC_DRV_DS17485
1073 bool "DS17485/DS17487"
1075 This enables support for the Dallas/Maxim DS17485/DS17487 real time
1078 This chip features 4kb of extended NV-SRAM.
1080 config RTC_DRV_DS17885
1081 bool "DS17885/DS17887"
1083 This enables support for the Dallas/Maxim DS17885/DS17887 real time
1086 This chip features 8kb of extended NV-SRAM.
1090 config RTC_DRV_DS1742
1091 tristate "Maxim/Dallas DS1742/1743"
1092 depends on HAS_IOMEM
1094 If you say yes here you get support for the
1095 Maxim/Dallas DS1742/1743 timekeeping chip.
1097 This driver can also be built as a module. If so, the module
1098 will be called rtc-ds1742.
1100 config RTC_DRV_DS2404
1101 tristate "Maxim/Dallas DS2404"
1103 If you say yes here you get support for the
1104 Dallas DS2404 RTC chip.
1106 This driver can also be built as a module. If so, the module
1107 will be called rtc-ds2404.
1109 config RTC_DRV_DA9052
1110 tristate "Dialog DA9052/DA9053 RTC"
1111 depends on PMIC_DA9052
1113 Say y here to support the RTC driver for Dialog Semiconductor
1114 DA9052-BC and DA9053-AA/Bx PMICs.
1116 config RTC_DRV_DA9055
1117 tristate "Dialog Semiconductor DA9055 RTC"
1118 depends on MFD_DA9055
1120 If you say yes here you will get support for the
1121 RTC of the Dialog DA9055 PMIC.
1123 This driver can also be built as a module. If so, the module
1124 will be called rtc-da9055
1126 config RTC_DRV_DA9063
1127 tristate "Dialog Semiconductor DA9063/DA9062 RTC"
1128 depends on MFD_DA9063 || MFD_DA9062
1130 If you say yes here you will get support for the RTC subsystem
1131 for the Dialog Semiconductor PMIC chips DA9063 and DA9062.
1133 This driver can also be built as a module. If so, the module
1134 will be called "rtc-da9063".
1138 depends on EFI && !X86
1140 If you say yes here you will get support for the EFI
1143 This driver can also be built as a module. If so, the module
1144 will be called rtc-efi.
1146 config RTC_DRV_STK17TA8
1147 tristate "Simtek STK17TA8"
1148 depends on HAS_IOMEM
1150 If you say yes here you get support for the
1151 Simtek STK17TA8 timekeeping chip.
1153 This driver can also be built as a module. If so, the module
1154 will be called rtc-stk17ta8.
1156 config RTC_DRV_M48T86
1157 tristate "ST M48T86/Dallas DS12887"
1158 depends on HAS_IOMEM
1160 If you say Y here you will get support for the
1161 ST M48T86 and Dallas DS12887 RTC chips.
1163 This driver can also be built as a module. If so, the module
1164 will be called rtc-m48t86.
1166 config RTC_DRV_M48T35
1167 tristate "ST M48T35"
1168 depends on HAS_IOMEM
1170 If you say Y here you will get support for the
1173 This driver can also be built as a module, if so, the module
1174 will be called "rtc-m48t35".
1176 config RTC_DRV_M48T59
1177 tristate "ST M48T59/M48T08/M48T02"
1178 depends on HAS_IOMEM
1180 If you say Y here you will get support for the
1181 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
1183 These chips are usually found in Sun SPARC and UltraSPARC
1186 This driver can also be built as a module, if so, the module
1187 will be called "rtc-m48t59".
1189 config RTC_DRV_MSM6242
1190 tristate "Oki MSM6242"
1191 depends on HAS_IOMEM
1193 If you say yes here you get support for the Oki MSM6242
1194 timekeeping chip. It is used in some Amiga models (e.g. A2000).
1196 This driver can also be built as a module. If so, the module
1197 will be called rtc-msm6242.
1199 config RTC_DRV_BQ4802
1200 tristate "TI BQ4802"
1201 depends on HAS_IOMEM
1203 If you say Y here you will get support for the TI
1206 This driver can also be built as a module. If so, the module
1207 will be called rtc-bq4802.
1209 config RTC_DRV_RP5C01
1210 tristate "Ricoh RP5C01"
1211 depends on HAS_IOMEM
1213 If you say yes here you get support for the Ricoh RP5C01
1214 timekeeping chip. It is used in some Amiga models (e.g. A3000
1217 This driver can also be built as a module. If so, the module
1218 will be called rtc-rp5c01.
1220 config RTC_DRV_V3020
1221 tristate "EM Microelectronic V3020"
1223 If you say yes here you will get support for the
1224 EM Microelectronic v3020 RTC chip.
1226 This driver can also be built as a module. If so, the module
1227 will be called rtc-v3020.
1229 config RTC_DRV_GAMECUBE
1230 tristate "Nintendo GameCube, Wii and Wii U RTC"
1231 depends on GAMECUBE || WII || COMPILE_TEST
1234 If you say yes here you will get support for the RTC subsystem
1235 of the Nintendo GameCube, Wii and Wii U.
1237 This driver can also be built as a module. If so, the module
1238 will be called "rtc-gamecube".
1240 config RTC_DRV_WM831X
1241 tristate "Wolfson Microelectronics WM831x RTC"
1242 depends on MFD_WM831X
1244 If you say yes here you will get support for the RTC subsystem
1245 of the Wolfson Microelectronics WM831X series PMICs.
1247 This driver can also be built as a module. If so, the module
1248 will be called "rtc-wm831x".
1250 config RTC_DRV_WM8350
1251 tristate "Wolfson Microelectronics WM8350 RTC"
1252 depends on MFD_WM8350
1254 If you say yes here you will get support for the RTC subsystem
1255 of the Wolfson Microelectronics WM8350.
1257 This driver can also be built as a module. If so, the module
1258 will be called "rtc-wm8350".
1260 config RTC_DRV_SC27XX
1261 tristate "Spreadtrum SC27xx RTC"
1262 depends on MFD_SC27XX_PMIC || COMPILE_TEST
1264 If you say Y here you will get support for the RTC subsystem
1265 of the Spreadtrum SC27xx series PMICs. The SC27xx series PMICs
1266 includes the SC2720, SC2721, SC2723, SC2730 and SC2731 chips.
1268 This driver can also be built as a module. If so, the module
1269 will be called rtc-sc27xx.
1271 config RTC_DRV_SPEAR
1272 tristate "SPEAR ST RTC"
1273 depends on PLAT_SPEAR || COMPILE_TEST
1276 If you say Y here you will get support for the RTC found on
1279 config RTC_DRV_PCF50633
1280 depends on MFD_PCF50633
1281 tristate "NXP PCF50633 RTC"
1283 If you say yes here you get support for the RTC subsystem of the
1284 NXP PCF50633 used in embedded systems.
1286 config RTC_DRV_AB8500
1287 tristate "ST-Ericsson AB8500 RTC"
1288 depends on AB8500_CORE
1290 select RTC_INTF_DEV_UIE_EMUL
1292 Select this to enable the ST-Ericsson AB8500 power management IC RTC
1293 support. This chip contains a battery- and capacitor-backed RTC.
1296 tristate "IBM OPAL RTC driver"
1297 depends on PPC_POWERNV
1300 If you say yes here you get support for the PowerNV platform RTC
1301 driver based on OPAL interfaces.
1303 This driver can also be built as a module. If so, the module
1304 will be called rtc-opal.
1306 config RTC_DRV_OPTEE
1307 tristate "OP-TEE based RTC driver"
1310 Select this to get support for OP-TEE based RTC control on SoCs where
1311 RTC are not accessible to the normal world (Linux).
1313 This driver can also be built as a module. If so, the module
1314 will be called rtc-optee.
1316 config RTC_DRV_ZYNQMP
1317 tristate "Xilinx Zynq Ultrascale+ MPSoC RTC"
1318 depends on OF && HAS_IOMEM
1320 If you say yes here you get support for the RTC controller found on
1321 Xilinx Zynq Ultrascale+ MPSoC.
1323 config RTC_DRV_CROS_EC
1324 tristate "Chrome OS EC RTC driver"
1327 If you say yes here you will get support for the
1328 Chrome OS Embedded Controller's RTC.
1330 This driver can also be built as a module. If so, the module
1331 will be called rtc-cros-ec.
1333 config RTC_DRV_NTXEC
1334 tristate "Netronix embedded controller RTC"
1335 depends on MFD_NTXEC
1337 Say yes here if you want to support the RTC functionality of the
1338 embedded controller found in certain e-book readers designed by the
1339 original design manufacturer Netronix.
1341 comment "on-CPU RTC drivers"
1343 config RTC_DRV_ASM9260
1344 tristate "Alphascale asm9260 RTC"
1345 depends on MACH_ASM9260 || COMPILE_TEST
1347 If you say yes here you get support for the RTC on the
1348 Alphascale asm9260 SoC.
1350 This driver can also be built as a module. If so, the module
1351 will be called rtc-asm9260.
1353 config RTC_DRV_DAVINCI
1354 tristate "TI DaVinci RTC"
1355 depends on ARCH_DAVINCI_DM365 || COMPILE_TEST
1357 If you say yes here you get support for the RTC on the
1358 DaVinci platforms (DM365).
1360 This driver can also be built as a module. If so, the module
1361 will be called rtc-davinci.
1363 config RTC_DRV_DIGICOLOR
1364 tristate "Conexant Digicolor RTC"
1365 depends on ARCH_DIGICOLOR || COMPILE_TEST
1367 If you say yes here you get support for the RTC on Conexant
1368 Digicolor platforms. This currently includes the CX92755 SoC.
1370 This driver can also be built as a module. If so, the module
1371 will be called rtc-digicolor.
1373 config RTC_DRV_IMXDI
1374 tristate "Freescale IMX DryIce Real Time Clock"
1378 Support for Freescale IMX DryIce RTC
1380 This driver can also be built as a module, if so, the module
1381 will be called "rtc-imxdi".
1383 config RTC_DRV_FSL_FTM_ALARM
1384 tristate "Freescale FlexTimer alarm timer"
1385 depends on ARCH_LAYERSCAPE || SOC_LS1021A || COMPILE_TEST
1387 For the FlexTimer in LS1012A, LS1021A, LS1028A, LS1043A, LS1046A,
1388 LS1088A, LS208xA, we can use FTM as the wakeup source.
1390 Say y here to enable FTM alarm support. The FTM alarm provides
1391 alarm functions for wakeup system from deep sleep.
1393 This driver can also be built as a module, if so, the module
1394 will be called "rtc-fsl-ftm-alarm".
1396 config RTC_DRV_MESON
1397 tristate "Amlogic Meson RTC"
1398 depends on (ARM && ARCH_MESON) || COMPILE_TEST
1401 Support for the RTC block on the Amlogic Meson6, Meson8, Meson8b
1404 This driver can also be built as a module, if so, the module
1405 will be called "rtc-meson".
1407 config RTC_DRV_MESON_VRTC
1408 tristate "Amlogic Meson Virtual RTC"
1409 depends on ARCH_MESON || COMPILE_TEST
1410 default m if ARCH_MESON
1412 If you say yes here you will get support for the
1413 Virtual RTC of Amlogic SoCs.
1415 This driver can also be built as a module. If so, the module
1416 will be called rtc-meson-vrtc.
1419 tristate "TI OMAP Real Time Clock"
1420 depends on ARCH_OMAP || ARCH_DAVINCI || COMPILE_TEST
1423 select GENERIC_PINCONF
1425 Say "yes" here to support the on chip real time clock
1426 present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1428 This driver can also be built as a module, if so, module
1429 will be called rtc-omap.
1432 tristate "Samsung S3C series SoC RTC"
1433 depends on ARCH_EXYNOS || ARCH_S3C64XX || ARCH_S3C24XX || ARCH_S5PV210 || \
1436 RTC (Realtime Clock) driver for the clock inbuilt into the
1437 Samsung S3C24XX series of SoCs. This can provide periodic
1438 interrupt rates from 1Hz to 64Hz for user programs, and
1441 The driver currently supports the common features on all the
1442 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
1445 This driver can also be build as a module. If so, the module
1446 will be called rtc-s3c.
1448 config RTC_DRV_EP93XX
1449 tristate "Cirrus Logic EP93XX"
1450 depends on ARCH_EP93XX || COMPILE_TEST
1452 If you say yes here you get support for the
1453 RTC embedded in the Cirrus Logic EP93XX processors.
1455 This driver can also be built as a module. If so, the module
1456 will be called rtc-ep93xx.
1458 config RTC_DRV_SA1100
1459 tristate "SA11x0/PXA2xx/PXA910"
1460 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
1462 If you say Y here you will get access to the real time clock
1463 built into your SA11x0 or PXA2xx CPU.
1465 To compile this driver as a module, choose M here: the
1466 module will be called rtc-sa1100.
1469 tristate "SuperH On-Chip RTC"
1470 depends on SUPERH || ARCH_RENESAS
1472 Say Y here to enable support for the on-chip RTC found in
1473 most SuperH processors. This RTC is also found in RZ/A SoCs.
1475 To compile this driver as a module, choose M here: the
1476 module will be called rtc-sh.
1478 config RTC_DRV_SUNPLUS
1479 tristate "Sunplus SP7021 RTC"
1480 depends on SOC_SP7021
1482 Say 'yes' to get support for the real-time clock present in
1483 Sunplus SP7021 - a SoC for industrial applications. It provides
1484 RTC status check, timer/alarm functionalities, user data
1485 reservation with the battery over 2.5V, RTC power status check
1488 This driver can also be built as a module. If so, the module
1489 will be called rtc-sunplus.
1491 config RTC_DRV_PL030
1492 tristate "ARM AMBA PL030 RTC"
1495 If you say Y here you will get access to ARM AMBA
1496 PrimeCell PL030 RTC found on certain ARM SOCs.
1498 To compile this driver as a module, choose M here: the
1499 module will be called rtc-pl030.
1501 config RTC_DRV_PL031
1502 tristate "ARM AMBA PL031 RTC"
1505 If you say Y here you will get access to ARM AMBA
1506 PrimeCell PL031 RTC found on certain ARM SOCs.
1508 To compile this driver as a module, choose M here: the
1509 module will be called rtc-pl031.
1511 config RTC_DRV_AT91RM9200
1512 tristate "AT91RM9200 or some AT91SAM9 RTC"
1513 depends on ARCH_AT91 || COMPILE_TEST
1516 Driver for the internal RTC (Realtime Clock) module found on
1517 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
1518 this is powered by the backup power supply.
1520 config RTC_DRV_AT91SAM9
1521 tristate "AT91SAM9 RTT as RTC"
1522 depends on ARCH_AT91 || COMPILE_TEST
1523 depends on OF && HAS_IOMEM
1526 Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
1527 can be used as an RTC thanks to the backup power supply (e.g. a
1528 small coin cell battery) which keeps this block and the GPBR
1529 (General Purpose Backup Registers) block powered when the device
1531 Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
1532 probably want to use the real RTC block instead of the "RTT as an
1535 config RTC_DRV_AU1XXX
1536 tristate "Au1xxx Counter0 RTC support"
1537 depends on MIPS_ALCHEMY
1539 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1540 counter) to be used as a RTC.
1542 This driver can also be built as a module. If so, the module
1543 will be called rtc-au1xxx.
1545 config RTC_DRV_RS5C313
1546 tristate "Ricoh RS5C313"
1547 depends on SH_LANDISK
1549 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1552 tristate "Renesas RZ/N1 RTC"
1553 depends on ARCH_RZN1 || COMPILE_TEST
1554 depends on OF && HAS_IOMEM
1556 If you say yes here you get support for the Renesas RZ/N1 RTC.
1558 config RTC_DRV_GENERIC
1559 tristate "Generic RTC support"
1560 # Please consider writing a new RTC driver instead of using the generic
1562 depends on PARISC || M68K || PPC || SUPERH || COMPILE_TEST
1564 Say Y or M here to enable RTC support on systems using the generic
1565 RTC abstraction. If you do not know what you are doing, you should
1569 tristate "PXA27x/PXA3xx"
1571 select RTC_DRV_SA1100
1573 If you say Y here you will get access to the real time clock
1574 built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs
1575 consisting of an SA1100 compatible RTC and the extended PXA RTC.
1577 This RTC driver uses PXA RTC registers available since pxa27x
1578 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1580 config RTC_DRV_VT8500
1581 tristate "VIA/WonderMedia 85xx SoC RTC"
1582 depends on ARCH_VT8500 || COMPILE_TEST
1584 If you say Y here you will get access to the real time clock
1585 built into your VIA VT8500 SoC or its relatives.
1588 config RTC_DRV_SUN4V
1589 bool "SUN4V Hypervisor RTC"
1592 If you say Y here you will get support for the Hypervisor
1593 based RTC on SUN4V systems.
1595 config RTC_DRV_SUN6I
1596 bool "Allwinner A31 RTC"
1597 default MACH_SUN6I || MACH_SUN8I
1598 depends on COMMON_CLK
1599 depends on ARCH_SUNXI || COMPILE_TEST
1601 If you say Y here you will get support for the RTC found in
1602 some Allwinner SoCs like the A31 or the A64.
1604 config RTC_DRV_SUNXI
1605 tristate "Allwinner sun4i/sun7i RTC"
1606 depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
1608 If you say Y here you will get support for the RTC found on
1611 config RTC_DRV_STARFIRE
1615 If you say Y here you will get support for the RTC found on
1619 tristate "Marvell SoC RTC"
1620 depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST
1622 If you say yes here you will get support for the in-chip RTC
1623 that can be found in some of Marvell's SoC devices, such as
1624 the Kirkwood 88F6281 and 88F6192.
1626 This driver can also be built as a module. If so, the module
1627 will be called rtc-mv.
1629 config RTC_DRV_ARMADA38X
1630 tristate "Armada 38x Marvell SoC RTC"
1631 depends on ARCH_MVEBU || COMPILE_TEST
1634 If you say yes here you will get support for the in-chip RTC
1635 that can be found in the Armada 38x Marvell's SoC device
1637 This driver can also be built as a module. If so, the module
1638 will be called armada38x-rtc.
1640 config RTC_DRV_CADENCE
1641 tristate "Cadence RTC driver"
1642 depends on OF && HAS_IOMEM
1644 If you say Y here you will get access to Cadence RTC IP
1645 found on certain SOCs.
1647 To compile this driver as a module, choose M here: the
1648 module will be called rtc-cadence.
1650 config RTC_DRV_FTRTC010
1651 tristate "Faraday Technology FTRTC010 RTC"
1652 depends on HAS_IOMEM
1655 If you say Y here you will get support for the
1656 Faraday Technolog FTRTC010 found on e.g. Gemini SoC's.
1658 This driver can also be built as a module. If so, the module
1659 will be called rtc-ftrtc010.
1665 If you say yes here you will get support for the RTC on PS3.
1667 This driver can also be built as a module. If so, the module
1668 will be called rtc-ps3.
1671 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1672 depends on ARCH_MXS || COMPILE_TEST
1675 If you say yes here you will get support for the onboard
1676 STMP3xxx/i.MX23/i.MX28 RTC.
1678 This driver can also be built as a module. If so, the module
1679 will be called rtc-stmp3xxx.
1685 If you say Y here you will get support for the RTC found on
1686 the PCAP2 ASIC used on some Motorola phones.
1688 config RTC_DRV_MC13XXX
1689 depends on MFD_MC13XXX
1690 tristate "Freescale MC13xxx RTC"
1692 This enables support for the RTCs found on Freescale's PMICs
1693 MC13783 and MC13892.
1695 config RTC_DRV_MPC5121
1696 tristate "Freescale MPC5121 built-in RTC"
1697 depends on PPC_MPC512x || PPC_MPC52xx
1699 If you say yes here you will get support for the
1700 built-in RTC on MPC5121 or on MPC5200.
1702 This driver can also be built as a module. If so, the module
1703 will be called rtc-mpc5121.
1705 config RTC_DRV_JZ4740
1706 tristate "Ingenic JZ4740 SoC"
1707 depends on MIPS || COMPILE_TEST
1710 If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
1713 This driver can also be built as a module. If so, the module
1714 will be called rtc-jz4740.
1716 config RTC_DRV_LPC24XX
1717 tristate "NXP RTC for LPC178x/18xx/408x/43xx"
1718 depends on ARCH_LPC18XX || COMPILE_TEST
1719 depends on OF && HAS_IOMEM
1721 This enables support for the NXP RTC found which can be found on
1722 NXP LPC178x/18xx/408x/43xx devices.
1724 If you have one of the devices above enable this driver to use
1725 the hardware RTC. This driver can also be built as a module. If
1726 so, the module will be called rtc-lpc24xx.
1728 config RTC_DRV_LPC32XX
1729 depends on ARCH_LPC32XX || COMPILE_TEST
1730 tristate "NXP LPC32XX RTC"
1732 This enables support for the NXP RTC in the LPC32XX
1734 This driver can also be built as a module. If so, the module
1735 will be called rtc-lpc32xx.
1737 config RTC_DRV_PM8XXX
1738 tristate "Qualcomm PMIC8XXX RTC"
1739 depends on MFD_PM8XXX || MFD_SPMI_PMIC || COMPILE_TEST
1741 If you say yes here you get support for the
1742 Qualcomm PMIC8XXX RTC.
1744 To compile this driver as a module, choose M here: the
1745 module will be called rtc-pm8xxx.
1747 config RTC_DRV_TEGRA
1748 tristate "NVIDIA Tegra Internal RTC driver"
1749 depends on ARCH_TEGRA || COMPILE_TEST
1751 If you say yes here you get support for the
1752 Tegra 200 series internal RTC module.
1754 This drive can also be built as a module. If so, the module
1755 will be called rtc-tegra.
1757 config RTC_DRV_LOONGSON1
1758 tristate "loongson1 RTC support"
1759 depends on MACH_LOONGSON32
1761 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1762 counter) to be used as a RTC.
1764 This driver can also be built as a module. If so, the module
1765 will be called rtc-ls1x.
1768 tristate "Freescale MXC Real Time Clock"
1769 depends on ARCH_MXC || COMPILE_TEST
1770 depends on HAS_IOMEM
1773 If you say yes here you get support for the Freescale MXC
1776 This driver can also be built as a module, if so, the module
1777 will be called "rtc-mxc".
1779 config RTC_DRV_MXC_V2
1780 tristate "Freescale MXC Real Time Clock for i.MX53"
1781 depends on ARCH_MXC || COMPILE_TEST
1782 depends on HAS_IOMEM
1785 If you say yes here you get support for the Freescale MXC
1786 SRTC module in i.MX53 processor.
1788 This driver can also be built as a module, if so, the module
1789 will be called "rtc-mxc_v2".
1792 tristate "Freescale SNVS RTC support"
1794 depends on ARCH_MXC || COMPILE_TEST
1795 depends on HAS_IOMEM
1798 If you say yes here you get support for the Freescale SNVS
1799 Low Power (LP) RTC module.
1801 This driver can also be built as a module, if so, the module
1802 will be called "rtc-snvs".
1804 config RTC_DRV_IMX_SC
1806 depends on HAVE_ARM_SMCCC
1807 tristate "NXP i.MX System Controller RTC support"
1809 If you say yes here you get support for the NXP i.MX System
1810 Controller RTC module.
1812 config RTC_DRV_ST_LPC
1813 tristate "STMicroelectronics LPC RTC"
1817 Say Y here to include STMicroelectronics Low Power Controller
1818 (LPC) based RTC support.
1820 To compile this driver as a module, choose M here: the
1821 module will be called rtc-st-lpc.
1823 config RTC_DRV_MOXART
1824 tristate "MOXA ART RTC"
1825 depends on ARCH_MOXART || COMPILE_TEST
1827 If you say yes here you get support for the MOXA ART
1830 This driver can also be built as a module. If so, the module
1831 will be called rtc-moxart
1833 config RTC_DRV_MT2712
1834 tristate "MediaTek MT2712 SoC based RTC"
1835 depends on ARCH_MEDIATEK || COMPILE_TEST
1837 This enables support for the real time clock built in the MediaTek
1840 This drive can also be built as a module. If so, the module
1841 will be called rtc-mt2712.
1843 config RTC_DRV_MT6397
1844 tristate "MediaTek PMIC based RTC"
1845 depends on MFD_MT6397 || (COMPILE_TEST && IRQ_DOMAIN)
1847 This selects the MediaTek(R) RTC driver. RTC is part of MediaTek
1848 MT6397 PMIC. You should enable MT6397 PMIC MFD before select
1849 MediaTek(R) RTC driver.
1851 If you want to use MediaTek(R) RTC interface, select Y or M here.
1853 config RTC_DRV_MT7622
1854 tristate "MediaTek SoC based RTC"
1855 depends on ARCH_MEDIATEK || COMPILE_TEST
1857 This enables support for the real time clock built in the MediaTek
1860 This drive can also be built as a module. If so, the module
1861 will be called rtc-mt7622.
1863 config RTC_DRV_XGENE
1864 tristate "APM X-Gene RTC"
1865 depends on HAS_IOMEM
1866 depends on ARCH_XGENE || COMPILE_TEST
1868 If you say yes here you get support for the APM X-Gene SoC real time
1871 This driver can also be built as a module, if so, the module
1872 will be called "rtc-xgene".
1874 config RTC_DRV_PIC32
1875 tristate "Microchip PIC32 RTC"
1876 depends on MACH_PIC32
1879 If you say yes here you get support for the PIC32 RTC module.
1881 This driver can also be built as a module. If so, the module
1882 will be called rtc-pic32
1884 config RTC_DRV_R7301
1885 tristate "EPSON TOYOCOM RTC-7301SF/DG"
1887 depends on OF && HAS_IOMEM
1889 If you say yes here you get support for the EPSON TOYOCOM
1890 RTC-7301SF/DG chips.
1892 This driver can also be built as a module. If so, the module
1893 will be called rtc-r7301.
1895 config RTC_DRV_STM32
1896 tristate "STM32 RTC"
1898 depends on ARCH_STM32 || COMPILE_TEST
1900 If you say yes here you get support for the STM32 On-Chip
1903 This driver can also be built as a module, if so, the module
1904 will be called "rtc-stm32".
1906 config RTC_DRV_CPCAP
1907 depends on MFD_CPCAP
1908 tristate "Motorola CPCAP RTC"
1910 Say y here for CPCAP rtc found on some Motorola phones
1911 and tablets such as Droid 4.
1913 config RTC_DRV_RTD119X
1914 bool "Realtek RTD129x RTC"
1915 depends on ARCH_REALTEK || COMPILE_TEST
1916 default ARCH_REALTEK
1918 If you say yes here, you get support for the RTD1295 SoC
1921 config RTC_DRV_ASPEED
1922 tristate "ASPEED RTC"
1924 depends on ARCH_ASPEED || COMPILE_TEST
1926 If you say yes here you get support for the ASPEED BMC SoC real time
1929 This driver can also be built as a module, if so, the module
1930 will be called "rtc-aspeed".
1932 config RTC_DRV_TI_K3
1933 tristate "TI K3 RTC"
1934 depends on ARCH_K3 || COMPILE_TEST
1937 If you say yes here you get support for the Texas Instruments's
1938 Real Time Clock for K3 architecture.
1940 This driver can also be built as a module, if so, the module
1941 will be called "rtc-ti-k3".
1943 comment "HID Sensor RTC drivers"
1945 config RTC_DRV_HID_SENSOR_TIME
1946 tristate "HID Sensor Time"
1948 depends on HID_SENSOR_HUB && IIO
1949 select HID_SENSOR_IIO_COMMON
1951 Say yes here to build support for the HID Sensors of type Time.
1952 This drivers makes such sensors available as RTCs.
1954 If this driver is compiled as a module, it will be named
1955 rtc-hid-sensor-time.
1957 config RTC_DRV_GOLDFISH
1958 tristate "Goldfish Real Time Clock"
1959 depends on HAS_IOMEM
1961 Say yes to enable RTC driver for the Goldfish based virtual platform.
1963 Goldfish is a code name for the virtual platform developed by Google
1964 for Android emulation.
1966 config RTC_DRV_WILCO_EC
1967 tristate "Wilco EC RTC"
1971 If you say yes here, you get read/write support for the Real Time
1972 Clock on the Wilco Embedded Controller (Wilco is a kind of Chromebook)
1974 This can also be built as a module. If so, the module will
1975 be named "rtc_wilco_ec".
1977 config RTC_DRV_MSC313
1978 tristate "MStar MSC313 RTC"
1979 depends on ARCH_MSTARV7 || COMPILE_TEST
1981 If you say yes here you get support for the Mstar MSC313e On-Chip
1984 This driver can also be built as a module, if so, the module
1985 will be called "rtc-msc313".
1987 config RTC_DRV_POLARFIRE_SOC
1988 tristate "Microchip PolarFire SoC built-in RTC"
1989 depends on SOC_MICROCHIP_POLARFIRE
1991 If you say yes here you will get support for the
1992 built-in RTC on Polarfire SoC.
1994 This driver can also be built as a module, if so, the module
1995 will be called "rtc-mpfs".