2 # RTC class/drivers configuration
8 config RTC_MC146818_LIB
13 bool "Real Time Clock"
15 depends on !S390 && !UML
18 Generic RTC class support. If you say yes here, you will
19 be allowed to plug one or more RTCs to your system. You will
20 probably want to enable one or more of the interfaces below.
25 bool "Set system time from RTC on startup and resume"
28 If you say yes here, the system time (wall clock) will be set using
29 the value read from a specified RTC device. This is useful to avoid
30 unnecessary fsck runs at boot time, and to network better.
32 config RTC_HCTOSYS_DEVICE
33 string "RTC used to set the system time"
34 depends on RTC_HCTOSYS
37 The RTC device that will be used to (re)initialize the system
38 clock, usually rtc0. Initialization is done when the system
39 starts up, and when it resumes from a low power state. This
40 device should record time in UTC, since the kernel won't do
43 The driver for this RTC device must be loaded before late_initcall
44 functions run, so it must usually be statically linked.
46 This clock should be battery-backed, so that it reads the correct
47 time when the system boots from a power-off state. Otherwise, your
48 system will need an external clock source (like an NTP server).
50 If the clock you specify here is not battery backed, it may still
51 be useful to reinitialize system time when resuming from system
52 sleep states. Do not specify an RTC here unless it stays powered
53 during all this system's supported sleep states.
56 bool "Set the RTC time based on NTP synchronization"
59 If you say yes here, the system time (wall clock) will be stored
60 in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
61 minutes if userspace reports synchronized NTP status.
63 config RTC_SYSTOHC_DEVICE
64 string "RTC used to synchronize NTP adjustment"
65 depends on RTC_SYSTOHC
66 default RTC_HCTOSYS_DEVICE if RTC_HCTOSYS
69 The RTC device used for NTP synchronization. The main difference
70 between RTC_HCTOSYS_DEVICE and RTC_SYSTOHC_DEVICE is that this
71 one can sleep when setting time, because it runs in the workqueue
75 bool "RTC debug support"
77 Say yes here to enable debugging support in the RTC framework
78 and individual RTC drivers.
80 comment "RTC interfaces"
83 bool "/sys/class/rtc/rtcN (sysfs)"
87 Say yes here if you want to use your RTCs using sysfs interfaces,
88 /sys/class/rtc/rtc0 through /sys/.../rtcN.
93 bool "/proc/driver/rtc (procfs for rtcN)"
97 Say yes here if you want to use your system clock RTC through
98 the proc interface, /proc/driver/rtc.
99 Other RTCs will not be available through that API.
100 If there is no RTC for the system clock, then the first RTC(rtc0)
106 bool "/dev/rtcN (character devices)"
109 Say yes here if you want to use your RTCs using the /dev
110 interfaces, which "udev" sets up as /dev/rtc0 through
113 You may want to set up a symbolic link so one of these
114 can be accessed as /dev/rtc, which is a name
115 expected by "hwclock" and some other programs. Recent
116 versions of "udev" are known to set up the symlink for you.
120 config RTC_INTF_DEV_UIE_EMUL
121 bool "RTC UIE emulation on dev interface"
122 depends on RTC_INTF_DEV
124 Provides an emulation for RTC_UIE if the underlying rtc chip
125 driver does not expose RTC_UIE ioctls. Those requests generate
126 once-per-second update interrupts, used for synchronization.
128 The emulation code will read the time from the hardware
129 clock several times per second, please enable this option
130 only if you know that you really need it.
133 tristate "Test driver/device"
135 If you say yes here you get support for the
136 RTC test driver. It's a software RTC which can be
137 used to test the RTC subsystem APIs. It gets
138 the time from the system clock.
139 You want this driver only if you are doing development
140 on the RTC subsystem. Please read the source code
143 This driver can also be built as a module. If so, the module
144 will be called rtc-test.
146 comment "I2C RTC drivers"
150 config RTC_DRV_88PM860X
151 tristate "Marvell 88PM860x"
152 depends on MFD_88PM860X
154 If you say yes here you get support for RTC function in Marvell
157 This driver can also be built as a module. If so, the module
158 will be called rtc-88pm860x.
160 config RTC_DRV_88PM80X
161 tristate "Marvell 88PM80x"
162 depends on MFD_88PM800
164 If you say yes here you get support for RTC function in Marvell
167 This driver can also be built as a module. If so, the module
168 will be called rtc-88pm80x.
170 config RTC_DRV_ABB5ZES3
172 tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3"
174 If you say yes here you get support for the Abracon
175 AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip.
177 This driver can also be built as a module. If so, the module
178 will be called rtc-ab-b5ze-s3.
180 config RTC_DRV_ABX80X
181 tristate "Abracon ABx80x"
183 If you say yes here you get support for Abracon AB080X and AB180X
184 families of ultra-low-power battery- and capacitor-backed real-time
187 This driver can also be built as a module. If so, the module
188 will be called rtc-abx80x.
191 tristate "X-Powers AC100"
194 If you say yes here you get support for the real-time clock found
195 in X-Powers AC100 family peripheral ICs.
197 This driver can also be built as a module. If so, the module
198 will be called rtc-ac100.
200 config RTC_DRV_AS3722
201 tristate "ams AS3722 RTC driver"
202 depends on MFD_AS3722
204 If you say yes here you get support for the RTC of ams AS3722 PMIC
207 This driver can also be built as a module. If so, the module
208 will be called rtc-as3722.
210 config RTC_DRV_DS1307
211 tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025, ISL12057"
213 If you say yes here you get support for various compatible RTC
214 chips (often with battery backup) connected with I2C. This driver
215 should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
216 EPSON RX-8025, Intersil ISL12057 and probably other chips. In some
217 cases the RTC must already have been initialized (by manufacturing or
220 The first seven registers on these chips hold an RTC, and other
221 registers may add features such as NVRAM, a trickle charger for
222 the RTC/NVRAM backup power, and alarms. NVRAM is visible in
223 sysfs, but other chip features may not be available.
225 This driver can also be built as a module. If so, the module
226 will be called rtc-ds1307.
228 config RTC_DRV_DS1307_HWMON
229 bool "HWMON support for rtc-ds1307"
230 depends on RTC_DRV_DS1307 && HWMON
231 depends on !(RTC_DRV_DS1307=y && HWMON=m)
234 Say Y here if you want to expose temperature sensor data on
235 rtc-ds1307 (only DS3231)
237 config RTC_DRV_DS1307_CENTURY
238 bool "Century bit support for rtc-ds1307"
239 depends on RTC_DRV_DS1307
242 The DS1307 driver suffered from a bug where it was enabling the
243 century bit inconditionnally but never used it when reading the time.
244 It made the driver unable to support dates beyond 2099.
245 Setting this option will add proper support for the century bit but if
246 the time was previously set using a kernel predating this option,
247 reading the date will return a date in the next century.
248 To solve that, you could boot a kernel without this option set, set
249 the RTC date and then boot a kernel with this option set.
251 config RTC_DRV_DS1374
252 tristate "Dallas/Maxim DS1374"
254 If you say yes here you get support for Dallas Semiconductor
255 DS1374 real-time clock chips. If an interrupt is associated
256 with the device, the alarm functionality is supported.
258 This driver can also be built as a module. If so, the module
259 will be called rtc-ds1374.
261 config RTC_DRV_DS1374_WDT
262 bool "Dallas/Maxim DS1374 watchdog timer"
263 depends on RTC_DRV_DS1374
265 If you say Y here you will get support for the
266 watchdog timer in the Dallas Semiconductor DS1374
267 real-time clock chips.
269 config RTC_DRV_DS1672
270 tristate "Dallas/Maxim DS1672"
272 If you say yes here you get support for the
273 Dallas/Maxim DS1672 timekeeping chip.
275 This driver can also be built as a module. If so, the module
276 will be called rtc-ds1672.
278 config RTC_DRV_HYM8563
279 tristate "Haoyu Microelectronics HYM8563"
282 Say Y to enable support for the HYM8563 I2C RTC chip. Apart
283 from the usual rtc functions it provides a clock output of
286 This driver can also be built as a module. If so, the module
287 will be called rtc-hym8563.
289 config RTC_DRV_LP8788
290 tristate "TI LP8788 RTC driver"
291 depends on MFD_LP8788
293 Say Y to enable support for the LP8788 RTC/ALARM driver.
295 config RTC_DRV_MAX6900
296 tristate "Maxim MAX6900"
298 If you say yes here you will get support for the
299 Maxim MAX6900 I2C RTC chip.
301 This driver can also be built as a module. If so, the module
302 will be called rtc-max6900.
304 config RTC_DRV_MAX8907
305 tristate "Maxim MAX8907"
306 depends on MFD_MAX8907 || COMPILE_TEST
308 If you say yes here you will get support for the
309 RTC of Maxim MAX8907 PMIC.
311 This driver can also be built as a module. If so, the module
312 will be called rtc-max8907.
314 config RTC_DRV_MAX8925
315 tristate "Maxim MAX8925"
316 depends on MFD_MAX8925
318 If you say yes here you will get support for the
319 RTC of Maxim MAX8925 PMIC.
321 This driver can also be built as a module. If so, the module
322 will be called rtc-max8925.
324 config RTC_DRV_MAX8998
325 tristate "Maxim MAX8998"
326 depends on MFD_MAX8998
328 If you say yes here you will get support for the
329 RTC of Maxim MAX8998 PMIC.
331 This driver can also be built as a module. If so, the module
332 will be called rtc-max8998.
334 config RTC_DRV_MAX8997
335 tristate "Maxim MAX8997"
336 depends on MFD_MAX8997
338 If you say yes here you will get support for the
339 RTC of Maxim MAX8997 PMIC.
341 This driver can also be built as a module. If so, the module
342 will be called rtc-max8997.
344 config RTC_DRV_MAX77686
345 tristate "Maxim MAX77686"
346 depends on MFD_MAX77686 || MFD_MAX77620 || COMPILE_TEST
348 If you say yes here you will get support for the
349 RTC of Maxim MAX77686/MAX77620/MAX77802 PMIC.
351 This driver can also be built as a module. If so, the module
352 will be called rtc-max77686.
355 tristate "Rockchip RK808/RK818 RTC"
358 If you say yes here you will get support for the
359 RTC of RK808 and RK818 PMIC.
361 This driver can also be built as a module. If so, the module
362 will be called rk808-rtc.
364 config RTC_DRV_RS5C372
365 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
367 If you say yes here you get support for the
368 Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
370 This driver can also be built as a module. If so, the module
371 will be called rtc-rs5c372.
373 config RTC_DRV_ISL1208
374 tristate "Intersil ISL1208"
376 If you say yes here you get support for the
377 Intersil ISL1208 RTC chip.
379 This driver can also be built as a module. If so, the module
380 will be called rtc-isl1208.
382 config RTC_DRV_ISL12022
383 tristate "Intersil ISL12022"
385 If you say yes here you get support for the
386 Intersil ISL12022 RTC chip.
388 This driver can also be built as a module. If so, the module
389 will be called rtc-isl12022.
392 tristate "Xicor/Intersil X1205"
394 If you say yes here you get support for the
395 Xicor/Intersil X1205 RTC chip.
397 This driver can also be built as a module. If so, the module
398 will be called rtc-x1205.
400 config RTC_DRV_PCF8523
401 tristate "NXP PCF8523"
403 If you say yes here you get support for the NXP PCF8523 RTC
406 This driver can also be built as a module. If so, the module
407 will be called rtc-pcf8523.
409 config RTC_DRV_PCF85063
410 tristate "NXP PCF85063"
412 If you say yes here you get support for the PCF85063 RTC chip
414 This driver can also be built as a module. If so, the module
415 will be called rtc-pcf85063.
417 config RTC_DRV_PCF8563
418 tristate "Philips PCF8563/Epson RTC8564"
420 If you say yes here you get support for the
421 Philips PCF8563 RTC chip. The Epson RTC8564
424 This driver can also be built as a module. If so, the module
425 will be called rtc-pcf8563.
427 config RTC_DRV_PCF8583
428 tristate "Philips PCF8583"
430 If you say yes here you get support for the Philips PCF8583
431 RTC chip found on Acorn RiscPCs. This driver supports the
432 platform specific method of retrieving the current year from
433 the RTC's SRAM. It will work on other platforms with the same
434 chip, but the year will probably have to be tweaked.
436 This driver can also be built as a module. If so, the module
437 will be called rtc-pcf8583.
439 config RTC_DRV_M41T80
440 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible"
442 If you say Y here you will get support for the ST M41T60
443 and M41T80 RTC chips series. Currently, the following chips are
444 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
445 M41ST85, M41ST87, and MicroCrystal RV4162.
447 This driver can also be built as a module. If so, the module
448 will be called rtc-m41t80.
450 config RTC_DRV_M41T80_WDT
451 bool "ST M41T65/M41T80 series RTC watchdog timer"
452 depends on RTC_DRV_M41T80
454 If you say Y here you will get support for the
455 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
458 tristate "TI BQ32000"
460 If you say Y here you will get support for the TI
461 BQ32000 I2C RTC chip.
463 This driver can also be built as a module. If so, the module
464 will be called rtc-bq32k.
466 config RTC_DRV_DM355EVM
467 tristate "TI DaVinci DM355 EVM RTC"
468 depends on MFD_DM355EVM_MSP
470 Supports the RTC firmware in the MSP430 on the DM355 EVM.
472 config RTC_DRV_TWL92330
473 bool "TI TWL92330/Menelaus"
476 If you say yes here you get support for the RTC on the
477 TWL92330 "Menelaus" power management chip, used with OMAP2
478 platforms. The support is integrated with the rest of
479 the Menelaus driver; it's not separate module.
481 config RTC_DRV_TWL4030
482 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
483 depends on TWL4030_CORE
486 If you say yes here you get support for the RTC on the
487 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
489 This driver can also be built as a module. If so, the module
490 will be called rtc-twl.
492 config RTC_DRV_PALMAS
493 tristate "TI Palmas RTC driver"
494 depends on MFD_PALMAS
496 If you say yes here you get support for the RTC of TI PALMA series PMIC
499 This driver can also be built as a module. If so, the module
500 will be called rtc-palma.
502 config RTC_DRV_TPS6586X
503 tristate "TI TPS6586X RTC driver"
504 depends on MFD_TPS6586X
506 TI Power Management IC TPS6586X supports RTC functionality
507 along with alarm. This driver supports the RTC driver for
508 the TPS6586X RTC module.
510 config RTC_DRV_TPS65910
511 tristate "TI TPS65910 RTC driver"
512 depends on RTC_CLASS && MFD_TPS65910
514 If you say yes here you get support for the RTC on the
517 This driver can also be built as a module. If so, the module
518 will be called rtc-tps65910.
520 config RTC_DRV_TPS80031
521 tristate "TI TPS80031/TPS80032 RTC driver"
522 depends on MFD_TPS80031
524 TI Power Management IC TPS80031 supports RTC functionality
525 along with alarm. This driver supports the RTC driver for
526 the TPS80031 RTC module.
528 config RTC_DRV_RC5T583
529 tristate "RICOH 5T583 RTC driver"
530 depends on MFD_RC5T583
532 If you say yes here you get support for the RTC on the
535 This driver can also be built as a module. If so, the module
536 will be called rtc-rc5t583.
538 config RTC_DRV_S35390A
539 tristate "Seiko Instruments S-35390A"
542 If you say yes here you will get support for the Seiko
543 Instruments S-35390A.
545 This driver can also be built as a module. If so the module
546 will be called rtc-s35390a.
548 config RTC_DRV_FM3130
549 tristate "Ramtron FM3130"
551 If you say Y here you will get support for the
552 Ramtron FM3130 RTC chips.
553 Ramtron FM3130 is a chip with two separate devices inside,
554 RTC clock and FRAM. This driver provides only RTC functionality.
556 This driver can also be built as a module. If so the module
557 will be called rtc-fm3130.
559 config RTC_DRV_RX8010
560 tristate "Epson RX8010SJ"
563 If you say yes here you get support for the Epson RX8010SJ RTC
566 This driver can also be built as a module. If so, the module
567 will be called rtc-rx8010.
569 config RTC_DRV_RX8581
570 tristate "Epson RX-8581"
572 If you say yes here you will get support for the Epson RX-8581.
574 This driver can also be built as a module. If so the module
575 will be called rtc-rx8581.
577 config RTC_DRV_RX8025
578 tristate "Epson RX-8025SA/NB"
580 If you say yes here you get support for the Epson
581 RX-8025SA/NB RTC chips.
583 This driver can also be built as a module. If so, the module
584 will be called rtc-rx8025.
586 config RTC_DRV_EM3027
587 tristate "EM Microelectronic EM3027"
589 If you say yes here you get support for the EM
590 Microelectronic EM3027 RTC chips.
592 This driver can also be built as a module. If so, the module
593 will be called rtc-em3027.
595 config RTC_DRV_RV8803
596 tristate "Micro Crystal RV8803, Epson RX8900"
598 If you say yes here you get support for the Micro Crystal RV8803 and
599 Epson RX8900 RTC chips.
601 This driver can also be built as a module. If so, the module
602 will be called rtc-rv8803.
605 tristate "Samsung S2M/S5M series"
606 depends on MFD_SEC_CORE || COMPILE_TEST
609 If you say yes here you will get support for the
610 RTC of Samsung S2MPS14 and S5M PMIC series.
612 This driver can also be built as a module. If so, the module
613 will be called rtc-s5m.
617 comment "SPI RTC drivers"
621 config RTC_DRV_M41T93
624 If you say yes here you will get support for the
625 ST M41T93 SPI RTC chip.
627 This driver can also be built as a module. If so, the module
628 will be called rtc-m41t93.
630 config RTC_DRV_M41T94
633 If you say yes here you will get support for the
634 ST M41T94 SPI RTC chip.
636 This driver can also be built as a module. If so, the module
637 will be called rtc-m41t94.
639 config RTC_DRV_DS1302
640 tristate "Dallas/Maxim DS1302"
643 If you say yes here you get support for the Dallas DS1302 RTC chips.
645 This driver can also be built as a module. If so, the module
646 will be called rtc-ds1302.
648 config RTC_DRV_DS1305
649 tristate "Dallas/Maxim DS1305/DS1306"
651 Select this driver to get support for the Dallas/Maxim DS1305
652 and DS1306 real time clock chips. These support a trickle
653 charger, alarms, and NVRAM in addition to the clock.
655 This driver can also be built as a module. If so, the module
656 will be called rtc-ds1305.
658 config RTC_DRV_DS1343
660 tristate "Dallas/Maxim DS1343/DS1344"
662 If you say yes here you get support for the
663 Dallas/Maxim DS1343 and DS1344 real time clock chips.
664 Support for trickle charger, alarm is provided.
666 This driver can also be built as a module. If so, the module
667 will be called rtc-ds1343.
669 config RTC_DRV_DS1347
671 tristate "Dallas/Maxim DS1347"
673 If you say yes here you get support for the
674 Dallas/Maxim DS1347 chips.
676 This driver only supports the RTC feature, and not other chip
677 features such as alarms.
679 This driver can also be built as a module. If so, the module
680 will be called rtc-ds1347.
682 config RTC_DRV_DS1390
683 tristate "Dallas/Maxim DS1390/93/94"
685 If you say yes here you get support for the
686 Dallas/Maxim DS1390/93/94 chips.
688 This driver supports the RTC feature and trickle charging but not
689 other chip features such as alarms.
691 This driver can also be built as a module. If so, the module
692 will be called rtc-ds1390.
694 config RTC_DRV_MAX6916
695 tristate "Maxim MAX6916"
697 If you say yes here you will get support for the
698 Maxim MAX6916 SPI RTC chip.
700 This driver only supports the RTC feature, and not other chip
701 features such as alarms.
703 This driver can also be built as a module. If so, the module
704 will be called rtc-max6916.
707 tristate "Epson RTC-9701JE"
709 If you say yes here you will get support for the
710 Epson RTC-9701JE SPI RTC chip.
712 This driver can also be built as a module. If so, the module
713 will be called rtc-r9701.
715 config RTC_DRV_RX4581
716 tristate "Epson RX-4581"
718 If you say yes here you will get support for the Epson RX-4581.
720 This driver can also be built as a module. If so the module
721 will be called rtc-rx4581.
723 config RTC_DRV_RX6110
724 tristate "Epson RX-6110"
727 If you say yes here you will get support for the Epson RX-6610.
729 This driver can also be built as a module. If so the module
730 will be called rtc-rx6110.
732 config RTC_DRV_RS5C348
733 tristate "Ricoh RS5C348A/B"
735 If you say yes here you get support for the
736 Ricoh RS5C348A and RS5C348B RTC chips.
738 This driver can also be built as a module. If so, the module
739 will be called rtc-rs5c348.
741 config RTC_DRV_MAX6902
742 tristate "Maxim MAX6902"
744 If you say yes here you will get support for the
745 Maxim MAX6902 SPI RTC chip.
747 This driver can also be built as a module. If so, the module
748 will be called rtc-max6902.
750 config RTC_DRV_PCF2123
751 tristate "NXP PCF2123"
753 If you say yes here you get support for the NXP PCF2123
756 This driver can also be built as a module. If so, the module
757 will be called rtc-pcf2123.
759 config RTC_DRV_MCP795
760 tristate "Microchip MCP795"
762 If you say yes here you will get support for the Microchip MCP795.
764 This driver can also be built as a module. If so the module
765 will be called rtc-mcp795.
770 # Helper to resolve issues with configs that have SPI enabled but I2C
771 # modular. See SND_SOC_I2C_AND_SPI for more information
773 config RTC_I2C_AND_SPI
777 default y if SPI_MASTER=y
778 select REGMAP_I2C if I2C
779 select REGMAP_SPI if SPI_MASTER
781 comment "SPI and I2C RTC drivers"
783 config RTC_DRV_DS3232
784 tristate "Dallas/Maxim DS3232/DS3234"
785 depends on RTC_I2C_AND_SPI
787 If you say yes here you get support for Dallas Semiconductor
788 DS3232 and DS3234 real-time clock chips. If an interrupt is associated
789 with the device, the alarm functionality is supported.
791 This driver can also be built as a module. If so, the module
792 will be called rtc-ds3232.
794 config RTC_DRV_PCF2127
795 tristate "NXP PCF2127"
796 depends on RTC_I2C_AND_SPI
798 If you say yes here you get support for the NXP PCF2127/29 RTC
801 This driver can also be built as a module. If so, the module
802 will be called rtc-pcf2127.
804 config RTC_DRV_RV3029C2
805 tristate "Micro Crystal RV3029/3049"
806 depends on RTC_I2C_AND_SPI
808 If you say yes here you get support for the Micro Crystal
809 RV3029 and RV3049 RTC chips.
811 This driver can also be built as a module. If so, the module
812 will be called rtc-rv3029c2.
814 config RTC_DRV_RV3029_HWMON
815 bool "HWMON support for RV3029/3049"
816 depends on RTC_DRV_RV3029C2 && HWMON
817 depends on !(RTC_DRV_RV3029C2=y && HWMON=m)
820 Say Y here if you want to expose temperature sensor data on
823 comment "Platform RTC drivers"
825 # this 'CMOS' RTC driver is arch dependent because it requires
826 # <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a
827 # global rtc_lock ... it's not yet just another platform_device.
830 tristate "PC-style 'CMOS'"
831 depends on X86 || ARM || M32R || PPC || MIPS || SPARC64 || MN10300
833 select RTC_MC146818_LIB
835 Say "yes" here to get direct support for the real time clock
836 found in every PC or ACPI-based system, and some other boards.
837 Specifically the original MC146818, compatibles like those in
838 PC south bridges, the DS12887 or M48T86, some multifunction
839 or LPC bus chips, and so on.
841 Your system will need to define the platform device used by
842 this driver, otherwise it won't be accessible. This means
843 you can safely enable this driver if you don't know whether
844 or not your board has this kind of hardware.
846 This driver can also be built as a module. If so, the module
847 will be called rtc-cmos.
850 bool "Alpha PC-style CMOS"
852 select RTC_MC146818_LIB
855 Direct support for the real-time clock found on every Alpha
856 system, specifically MC146818 compatibles. If in doubt, say Y.
859 tristate "Virtual RTC for Intel MID platforms"
860 depends on X86_INTEL_MID
861 default y if X86_INTEL_MID
864 Say "yes" here to get direct support for the real time clock
865 found on Moorestown platforms. The VRTC is a emulated RTC that
866 derives its clock source from a real RTC in the PMIC. The MC146818
867 style programming interface is mostly conserved, but any
868 updates are done via IPC calls to the system controller FW.
870 config RTC_DRV_DS1216
871 tristate "Dallas DS1216"
874 If you say yes here you get support for the Dallas DS1216 RTC chips.
876 config RTC_DRV_DS1286
877 tristate "Dallas DS1286"
880 If you say yes here you get support for the Dallas DS1286 RTC chips.
882 config RTC_DRV_DS1511
883 tristate "Dallas DS1511"
886 If you say yes here you get support for the
887 Dallas DS1511 timekeeping/watchdog chip.
889 This driver can also be built as a module. If so, the module
890 will be called rtc-ds1511.
892 config RTC_DRV_DS1553
893 tristate "Maxim/Dallas DS1553"
896 If you say yes here you get support for the
897 Maxim/Dallas DS1553 timekeeping chip.
899 This driver can also be built as a module. If so, the module
900 will be called rtc-ds1553.
902 config RTC_DRV_DS1685_FAMILY
903 tristate "Dallas/Maxim DS1685 Family"
905 If you say yes here you get support for the Dallas/Maxim DS1685
906 family of real time chips. This family includes the DS1685/DS1687,
907 DS1689/DS1693, DS17285/DS17287, DS17485/DS17487, and
908 DS17885/DS17887 chips.
910 This driver can also be built as a module. If so, the module
911 will be called rtc-ds1685.
915 depends on RTC_DRV_DS1685_FAMILY
916 default RTC_DRV_DS1685
918 config RTC_DRV_DS1685
921 This enables support for the Dallas/Maxim DS1685/DS1687 real time
924 This chip is commonly found in SGI O2 (IP32) and SGI Octane (IP30)
925 systems, as well as EPPC-405-UC modules by electronic system design
928 config RTC_DRV_DS1689
931 This enables support for the Dallas/Maxim DS1689/DS1693 real time
934 This is an older RTC chip, supplanted by the DS1685/DS1687 above,
935 which supports a few minor features such as Vcc, Vbat, and Power
936 Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
938 It also works for the even older DS1688/DS1691 RTC chips, which are
939 virtually the same and carry the same model number. Both chips
940 have 114 bytes of user NVRAM.
942 config RTC_DRV_DS17285
943 bool "DS17285/DS17287"
945 This enables support for the Dallas/Maxim DS17285/DS17287 real time
948 This chip features 2kb of extended NV-SRAM. It may possibly be
949 found in some SGI O2 systems (rare).
951 config RTC_DRV_DS17485
952 bool "DS17485/DS17487"
954 This enables support for the Dallas/Maxim DS17485/DS17487 real time
957 This chip features 4kb of extended NV-SRAM.
959 config RTC_DRV_DS17885
960 bool "DS17885/DS17887"
962 This enables support for the Dallas/Maxim DS17885/DS17887 real time
965 This chip features 8kb of extended NV-SRAM.
969 config RTC_DS1685_PROC_REGS
970 bool "Display register values in /proc"
971 depends on RTC_DRV_DS1685_FAMILY && PROC_FS
973 Enable this to display a readout of all of the RTC registers in
974 /proc/drivers/rtc. Keep in mind that this can potentially lead
975 to lost interrupts, as reading Control Register C will clear
976 all pending IRQ flags.
978 Unless you are debugging this driver, choose N.
980 config RTC_DS1685_SYSFS_REGS
981 bool "SysFS access to RTC register bits"
982 depends on RTC_DRV_DS1685_FAMILY && SYSFS
984 Enable this to provide access to the RTC control register bits
985 in /sys. Some of the bits are read-write, others are read-only.
987 Keep in mind that reading Control C's bits automatically clears
988 all pending IRQ flags - this can cause lost interrupts.
990 If you know that you need access to these bits, choose Y, Else N.
992 config RTC_DRV_DS1742
993 tristate "Maxim/Dallas DS1742/1743"
996 If you say yes here you get support for the
997 Maxim/Dallas DS1742/1743 timekeeping chip.
999 This driver can also be built as a module. If so, the module
1000 will be called rtc-ds1742.
1002 config RTC_DRV_DS2404
1003 tristate "Maxim/Dallas DS2404"
1005 If you say yes here you get support for the
1006 Dallas DS2404 RTC chip.
1008 This driver can also be built as a module. If so, the module
1009 will be called rtc-ds2404.
1011 config RTC_DRV_DA9052
1012 tristate "Dialog DA9052/DA9053 RTC"
1013 depends on PMIC_DA9052
1015 Say y here to support the RTC driver for Dialog Semiconductor
1016 DA9052-BC and DA9053-AA/Bx PMICs.
1018 config RTC_DRV_DA9055
1019 tristate "Dialog Semiconductor DA9055 RTC"
1020 depends on MFD_DA9055
1022 If you say yes here you will get support for the
1023 RTC of the Dialog DA9055 PMIC.
1025 This driver can also be built as a module. If so, the module
1026 will be called rtc-da9055
1028 config RTC_DRV_DA9063
1029 tristate "Dialog Semiconductor DA9063/DA9062 RTC"
1030 depends on MFD_DA9063 || MFD_DA9062
1032 If you say yes here you will get support for the RTC subsystem
1033 for the Dialog Semiconductor PMIC chips DA9063 and DA9062.
1035 This driver can also be built as a module. If so, the module
1036 will be called "rtc-da9063".
1040 depends on EFI && !X86
1042 If you say yes here you will get support for the EFI
1045 This driver can also be built as a module. If so, the module
1046 will be called rtc-efi.
1048 config RTC_DRV_STK17TA8
1049 tristate "Simtek STK17TA8"
1050 depends on HAS_IOMEM
1052 If you say yes here you get support for the
1053 Simtek STK17TA8 timekeeping chip.
1055 This driver can also be built as a module. If so, the module
1056 will be called rtc-stk17ta8.
1058 config RTC_DRV_M48T86
1059 tristate "ST M48T86/Dallas DS12887"
1061 If you say Y here you will get support for the
1062 ST M48T86 and Dallas DS12887 RTC chips.
1064 This driver can also be built as a module. If so, the module
1065 will be called rtc-m48t86.
1067 config RTC_DRV_M48T35
1068 tristate "ST M48T35"
1069 depends on HAS_IOMEM
1071 If you say Y here you will get support for the
1074 This driver can also be built as a module, if so, the module
1075 will be called "rtc-m48t35".
1077 config RTC_DRV_M48T59
1078 tristate "ST M48T59/M48T08/M48T02"
1079 depends on HAS_IOMEM
1081 If you say Y here you will get support for the
1082 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
1084 These chips are usually found in Sun SPARC and UltraSPARC
1087 This driver can also be built as a module, if so, the module
1088 will be called "rtc-m48t59".
1090 config RTC_DRV_MSM6242
1091 tristate "Oki MSM6242"
1092 depends on HAS_IOMEM
1094 If you say yes here you get support for the Oki MSM6242
1095 timekeeping chip. It is used in some Amiga models (e.g. A2000).
1097 This driver can also be built as a module. If so, the module
1098 will be called rtc-msm6242.
1100 config RTC_DRV_BQ4802
1101 tristate "TI BQ4802"
1102 depends on HAS_IOMEM
1104 If you say Y here you will get support for the TI
1107 This driver can also be built as a module. If so, the module
1108 will be called rtc-bq4802.
1110 config RTC_DRV_RP5C01
1111 tristate "Ricoh RP5C01"
1112 depends on HAS_IOMEM
1114 If you say yes here you get support for the Ricoh RP5C01
1115 timekeeping chip. It is used in some Amiga models (e.g. A3000
1118 This driver can also be built as a module. If so, the module
1119 will be called rtc-rp5c01.
1121 config RTC_DRV_V3020
1122 tristate "EM Microelectronic V3020"
1124 If you say yes here you will get support for the
1125 EM Microelectronic v3020 RTC chip.
1127 This driver can also be built as a module. If so, the module
1128 will be called rtc-v3020.
1130 config RTC_DRV_WM831X
1131 tristate "Wolfson Microelectronics WM831x RTC"
1132 depends on MFD_WM831X
1134 If you say yes here you will get support for the RTC subsystem
1135 of the Wolfson Microelectronics WM831X series PMICs.
1137 This driver can also be built as a module. If so, the module
1138 will be called "rtc-wm831x".
1140 config RTC_DRV_WM8350
1141 tristate "Wolfson Microelectronics WM8350 RTC"
1142 depends on MFD_WM8350
1144 If you say yes here you will get support for the RTC subsystem
1145 of the Wolfson Microelectronics WM8350.
1147 This driver can also be built as a module. If so, the module
1148 will be called "rtc-wm8350".
1150 config RTC_DRV_SPEAR
1151 tristate "SPEAR ST RTC"
1152 depends on PLAT_SPEAR || COMPILE_TEST
1155 If you say Y here you will get support for the RTC found on
1158 config RTC_DRV_PCF50633
1159 depends on MFD_PCF50633
1160 tristate "NXP PCF50633 RTC"
1162 If you say yes here you get support for the RTC subsystem of the
1163 NXP PCF50633 used in embedded systems.
1165 config RTC_DRV_AB3100
1166 tristate "ST-Ericsson AB3100 RTC"
1167 depends on AB3100_CORE
1168 default y if AB3100_CORE
1170 Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
1171 support. This chip contains a battery- and capacitor-backed RTC.
1173 config RTC_DRV_AB8500
1174 tristate "ST-Ericsson AB8500 RTC"
1175 depends on AB8500_CORE
1177 select RTC_INTF_DEV_UIE_EMUL
1179 Select this to enable the ST-Ericsson AB8500 power management IC RTC
1180 support. This chip contains a battery- and capacitor-backed RTC.
1182 config RTC_DRV_NUC900
1183 tristate "NUC910/NUC920 RTC driver"
1184 depends on ARCH_W90X900 || COMPILE_TEST
1186 If you say yes here you get support for the RTC subsystem of the
1187 NUC910/NUC920 used in embedded systems.
1190 tristate "IBM OPAL RTC driver"
1191 depends on PPC_POWERNV
1194 If you say yes here you get support for the PowerNV platform RTC
1195 driver based on OPAL interfaces.
1197 This driver can also be built as a module. If so, the module
1198 will be called rtc-opal.
1200 config RTC_DRV_ZYNQMP
1201 tristate "Xilinx Zynq Ultrascale+ MPSoC RTC"
1204 If you say yes here you get support for the RTC controller found on
1205 Xilinx Zynq Ultrascale+ MPSoC.
1207 comment "on-CPU RTC drivers"
1209 config RTC_DRV_ASM9260
1210 tristate "Alphascale asm9260 RTC"
1211 depends on MACH_ASM9260 || COMPILE_TEST
1213 If you say yes here you get support for the RTC on the
1214 Alphascale asm9260 SoC.
1216 This driver can also be built as a module. If so, the module
1217 will be called rtc-asm9260.
1219 config RTC_DRV_DAVINCI
1220 tristate "TI DaVinci RTC"
1221 depends on ARCH_DAVINCI_DM365 || COMPILE_TEST
1223 If you say yes here you get support for the RTC on the
1224 DaVinci platforms (DM365).
1226 This driver can also be built as a module. If so, the module
1227 will be called rtc-davinci.
1229 config RTC_DRV_DIGICOLOR
1230 tristate "Conexant Digicolor RTC"
1231 depends on ARCH_DIGICOLOR || COMPILE_TEST
1233 If you say yes here you get support for the RTC on Conexant
1234 Digicolor platforms. This currently includes the CX92755 SoC.
1236 This driver can also be built as a module. If so, the module
1237 will be called rtc-digicolor.
1239 config RTC_DRV_IMXDI
1240 tristate "Freescale IMX DryIce Real Time Clock"
1243 Support for Freescale IMX DryIce RTC
1245 This driver can also be built as a module, if so, the module
1246 will be called "rtc-imxdi".
1249 tristate "TI OMAP Real Time Clock"
1250 depends on ARCH_OMAP || ARCH_DAVINCI || COMPILE_TEST
1253 select GENERIC_PINCONF
1255 Say "yes" here to support the on chip real time clock
1256 present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1258 This driver can also be built as a module, if so, module
1259 will be called rtc-omap.
1264 This will include RTC support for Samsung SoCs. If
1265 you want to include RTC support for any machine, kindly
1266 select this in the respective mach-XXXX/Kconfig file.
1269 tristate "Samsung S3C series SoC RTC"
1270 depends on ARCH_S3C64XX || HAVE_S3C_RTC || COMPILE_TEST
1272 RTC (Realtime Clock) driver for the clock inbuilt into the
1273 Samsung S3C24XX series of SoCs. This can provide periodic
1274 interrupt rates from 1Hz to 64Hz for user programs, and
1277 The driver currently supports the common features on all the
1278 S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440
1281 This driver can also be build as a module. If so, the module
1282 will be called rtc-s3c.
1284 config RTC_DRV_EP93XX
1285 tristate "Cirrus Logic EP93XX"
1286 depends on ARCH_EP93XX || COMPILE_TEST
1288 If you say yes here you get support for the
1289 RTC embedded in the Cirrus Logic EP93XX processors.
1291 This driver can also be built as a module. If so, the module
1292 will be called rtc-ep93xx.
1294 config RTC_DRV_SA1100
1295 tristate "SA11x0/PXA2xx/PXA910"
1296 depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP
1298 If you say Y here you will get access to the real time clock
1299 built into your SA11x0 or PXA2xx CPU.
1301 To compile this driver as a module, choose M here: the
1302 module will be called rtc-sa1100.
1305 tristate "SuperH On-Chip RTC"
1306 depends on SUPERH && HAVE_CLK
1308 Say Y here to enable support for the on-chip RTC found in
1309 most SuperH processors.
1311 To compile this driver as a module, choose M here: the
1312 module will be called rtc-sh.
1314 config RTC_DRV_VR41XX
1315 tristate "NEC VR41XX"
1316 depends on CPU_VR41XX || COMPILE_TEST
1318 If you say Y here you will get access to the real time clock
1319 built into your NEC VR41XX CPU.
1321 To compile this driver as a module, choose M here: the
1322 module will be called rtc-vr41xx.
1324 config RTC_DRV_PL030
1325 tristate "ARM AMBA PL030 RTC"
1328 If you say Y here you will get access to ARM AMBA
1329 PrimeCell PL030 RTC found on certain ARM SOCs.
1331 To compile this driver as a module, choose M here: the
1332 module will be called rtc-pl030.
1334 config RTC_DRV_PL031
1335 tristate "ARM AMBA PL031 RTC"
1338 If you say Y here you will get access to ARM AMBA
1339 PrimeCell PL031 RTC found on certain ARM SOCs.
1341 To compile this driver as a module, choose M here: the
1342 module will be called rtc-pl031.
1344 config RTC_DRV_AT32AP700X
1345 tristate "AT32AP700X series RTC"
1346 depends on PLATFORM_AT32AP || COMPILE_TEST
1348 Driver for the internal RTC (Realtime Clock) on Atmel AVR32
1349 AT32AP700x family processors.
1351 config RTC_DRV_AT91RM9200
1352 tristate "AT91RM9200 or some AT91SAM9 RTC"
1353 depends on ARCH_AT91 || COMPILE_TEST
1355 Driver for the internal RTC (Realtime Clock) module found on
1356 Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips
1357 this is powered by the backup power supply.
1359 config RTC_DRV_AT91SAM9
1360 tristate "AT91SAM9 RTT as RTC"
1361 depends on ARCH_AT91 || COMPILE_TEST
1364 Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
1365 can be used as an RTC thanks to the backup power supply (e.g. a
1366 small coin cell battery) which keeps this block and the GPBR
1367 (General Purpose Backup Registers) block powered when the device
1369 Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
1370 probably want to use the real RTC block instead of the "RTT as an
1373 config RTC_DRV_AU1XXX
1374 tristate "Au1xxx Counter0 RTC support"
1375 depends on MIPS_ALCHEMY
1377 This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1378 counter) to be used as a RTC.
1380 This driver can also be built as a module. If so, the module
1381 will be called rtc-au1xxx.
1384 tristate "Blackfin On-Chip RTC"
1385 depends on BLACKFIN && !BF561
1387 If you say yes here you will get support for the
1388 Blackfin On-Chip Real Time Clock.
1390 This driver can also be built as a module. If so, the module
1391 will be called rtc-bfin.
1393 config RTC_DRV_RS5C313
1394 tristate "Ricoh RS5C313"
1395 depends on SH_LANDISK
1397 If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1399 config RTC_DRV_GENERIC
1400 tristate "Generic RTC support"
1401 # Please consider writing a new RTC driver instead of using the generic
1403 depends on PARISC || M68K || PPC || SUPERH32 || COMPILE_TEST
1405 Say Y or M here to enable RTC support on systems using the generic
1406 RTC abstraction. If you do not know what you are doing, you should
1410 tristate "PXA27x/PXA3xx"
1412 select RTC_DRV_SA1100
1414 If you say Y here you will get access to the real time clock
1415 built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs
1416 consisting of an SA1100 compatible RTC and the extended PXA RTC.
1418 This RTC driver uses PXA RTC registers available since pxa27x
1419 series (RDxR, RYxR) instead of legacy RCNR, RTAR.
1421 config RTC_DRV_VT8500
1422 tristate "VIA/WonderMedia 85xx SoC RTC"
1423 depends on ARCH_VT8500 || COMPILE_TEST
1425 If you say Y here you will get access to the real time clock
1426 built into your VIA VT8500 SoC or its relatives.
1429 config RTC_DRV_SUN4V
1430 bool "SUN4V Hypervisor RTC"
1433 If you say Y here you will get support for the Hypervisor
1434 based RTC on SUN4V systems.
1436 config RTC_DRV_SUN6I
1437 tristate "Allwinner A31 RTC"
1438 default MACH_SUN6I || MACH_SUN8I || COMPILE_TEST
1439 depends on ARCH_SUNXI
1441 If you say Y here you will get support for the RTC found in
1442 some Allwinner SoCs like the A31 or the A64.
1444 config RTC_DRV_SUNXI
1445 tristate "Allwinner sun4i/sun7i RTC"
1446 depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
1448 If you say Y here you will get support for the RTC found on
1451 config RTC_DRV_STARFIRE
1455 If you say Y here you will get support for the RTC found on
1458 config RTC_DRV_TX4939
1459 tristate "TX4939 SoC"
1460 depends on SOC_TX4939
1462 Driver for the internal RTC (Realtime Clock) module found on
1466 tristate "Marvell SoC RTC"
1467 depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST
1469 If you say yes here you will get support for the in-chip RTC
1470 that can be found in some of Marvell's SoC devices, such as
1471 the Kirkwood 88F6281 and 88F6192.
1473 This driver can also be built as a module. If so, the module
1474 will be called rtc-mv.
1476 config RTC_DRV_ARMADA38X
1477 tristate "Armada 38x Marvell SoC RTC"
1478 depends on ARCH_MVEBU || COMPILE_TEST
1480 If you say yes here you will get support for the in-chip RTC
1481 that can be found in the Armada 38x Marvell's SoC device
1483 This driver can also be built as a module. If so, the module
1484 will be called armada38x-rtc.
1486 config RTC_DRV_GEMINI
1487 tristate "Gemini SoC RTC"
1488 depends on ARCH_GEMINI || COMPILE_TEST
1489 depends on HAS_IOMEM
1491 If you say Y here you will get support for the
1492 RTC found on Gemini SoC's.
1494 This driver can also be built as a module. If so, the module
1495 will be called rtc-gemini.
1501 If you say yes here you will get support for the RTC on PS3.
1503 This driver can also be built as a module. If so, the module
1504 will be called rtc-ps3.
1506 config RTC_DRV_COH901331
1507 tristate "ST-Ericsson COH 901 331 RTC"
1508 depends on ARCH_U300 || COMPILE_TEST
1510 If you say Y here you will get access to ST-Ericsson
1511 COH 901 331 RTC clock found in some ST-Ericsson Mobile
1514 This driver can also be built as a module. If so, the module
1515 will be called "rtc-coh901331".
1519 tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1520 depends on ARCH_MXS || COMPILE_TEST
1523 If you say yes here you will get support for the onboard
1524 STMP3xxx/i.MX23/i.MX28 RTC.
1526 This driver can also be built as a module. If so, the module
1527 will be called rtc-stmp3xxx.
1533 If you say Y here you will get support for the RTC found on
1534 the PCAP2 ASIC used on some Motorola phones.
1536 config RTC_DRV_MC13XXX
1537 depends on MFD_MC13XXX
1538 tristate "Freescale MC13xxx RTC"
1540 This enables support for the RTCs found on Freescale's PMICs
1541 MC13783 and MC13892.
1543 config RTC_DRV_MPC5121
1544 tristate "Freescale MPC5121 built-in RTC"
1545 depends on PPC_MPC512x || PPC_MPC52xx
1547 If you say yes here you will get support for the
1548 built-in RTC on MPC5121 or on MPC5200.
1550 This driver can also be built as a module. If so, the module
1551 will be called rtc-mpc5121.
1553 config RTC_DRV_JZ4740
1554 bool "Ingenic JZ4740 SoC"
1555 depends on MACH_INGENIC || COMPILE_TEST
1557 If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
1560 config RTC_DRV_LPC24XX
1561 tristate "NXP RTC for LPC178x/18xx/408x/43xx"
1562 depends on ARCH_LPC18XX || COMPILE_TEST
1563 depends on OF && HAS_IOMEM
1565 This enables support for the NXP RTC found which can be found on
1566 NXP LPC178x/18xx/408x/43xx devices.
1568 If you have one of the devices above enable this driver to use
1569 the hardware RTC. This driver can also be built as a module. If
1570 so, the module will be called rtc-lpc24xx.
1572 config RTC_DRV_LPC32XX
1573 depends on ARCH_LPC32XX || COMPILE_TEST
1574 tristate "NXP LPC32XX RTC"
1576 This enables support for the NXP RTC in the LPC32XX
1578 This driver can also be built as a module. If so, the module
1579 will be called rtc-lpc32xx.
1581 config RTC_DRV_PM8XXX
1582 tristate "Qualcomm PMIC8XXX RTC"
1583 depends on MFD_PM8XXX || MFD_SPMI_PMIC || COMPILE_TEST
1585 If you say yes here you get support for the
1586 Qualcomm PMIC8XXX RTC.
1588 To compile this driver as a module, choose M here: the
1589 module will be called rtc-pm8xxx.
1591 config RTC_DRV_TEGRA
1592 tristate "NVIDIA Tegra Internal RTC driver"
1593 depends on ARCH_TEGRA || COMPILE_TEST
1595 If you say yes here you get support for the
1596 Tegra 200 series internal RTC module.
1598 This drive can also be built as a module. If so, the module
1599 will be called rtc-tegra.
1602 tristate "Tilera hypervisor RTC support"
1605 Enable support for the Linux driver side of the Tilera
1606 hypervisor's real-time clock interface.
1609 tristate "PKUnity v3 RTC support"
1610 depends on ARCH_PUV3
1612 This enables support for the RTC in the PKUnity-v3 SoCs.
1614 This drive can also be built as a module. If so, the module
1615 will be called rtc-puv3.
1617 config RTC_DRV_LOONGSON1
1618 tristate "loongson1 RTC support"
1619 depends on MACH_LOONGSON32
1621 This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1622 counter) to be used as a RTC.
1624 This driver can also be built as a module. If so, the module
1625 will be called rtc-ls1x.
1628 tristate "Freescale MXC Real Time Clock"
1631 If you say yes here you get support for the Freescale MXC
1634 This driver can also be built as a module, if so, the module
1635 will be called "rtc-mxc".
1638 tristate "Freescale SNVS RTC support"
1640 depends on HAS_IOMEM
1643 If you say yes here you get support for the Freescale SNVS
1644 Low Power (LP) RTC module.
1646 This driver can also be built as a module, if so, the module
1647 will be called "rtc-snvs".
1649 config RTC_DRV_SIRFSOC
1650 tristate "SiRFSOC RTC"
1651 depends on ARCH_SIRF
1653 Say "yes" here to support the real time clock on SiRF SOC chips.
1654 This driver can also be built as a module called rtc-sirfsoc.
1656 config RTC_DRV_ST_LPC
1657 tristate "STMicroelectronics LPC RTC"
1661 Say Y here to include STMicroelectronics Low Power Controller
1662 (LPC) based RTC support.
1664 To compile this driver as a module, choose M here: the
1665 module will be called rtc-st-lpc.
1667 config RTC_DRV_MOXART
1668 tristate "MOXA ART RTC"
1669 depends on ARCH_MOXART || COMPILE_TEST
1671 If you say yes here you get support for the MOXA ART
1674 This driver can also be built as a module. If so, the module
1675 will be called rtc-moxart
1677 config RTC_DRV_MT6397
1678 tristate "Mediatek Real Time Clock driver"
1679 depends on MFD_MT6397 || (COMPILE_TEST && IRQ_DOMAIN)
1681 This selects the Mediatek(R) RTC driver. RTC is part of Mediatek
1682 MT6397 PMIC. You should enable MT6397 PMIC MFD before select
1683 Mediatek(R) RTC driver.
1685 If you want to use Mediatek(R) RTC interface, select Y or M here.
1687 config RTC_DRV_XGENE
1688 tristate "APM X-Gene RTC"
1689 depends on HAS_IOMEM
1690 depends on ARCH_XGENE || COMPILE_TEST
1692 If you say yes here you get support for the APM X-Gene SoC real time
1695 This driver can also be built as a module, if so, the module
1696 will be called "rtc-xgene".
1698 config RTC_DRV_PIC32
1699 tristate "Microchip PIC32 RTC"
1700 depends on MACH_PIC32
1703 If you say yes here you get support for the PIC32 RTC module.
1705 This driver can also be built as a module. If so, the module
1706 will be called rtc-pic32
1708 config RTC_DRV_R7301
1709 tristate "EPSON TOYOCOM RTC-7301SF/DG"
1711 depends on OF && HAS_IOMEM
1713 If you say yes here you get support for the EPSON TOYOCOM
1714 RTC-7301SF/DG chips.
1716 This driver can also be built as a module. If so, the module
1717 will be called rtc-r7301.
1719 comment "HID Sensor RTC drivers"
1721 config RTC_DRV_HID_SENSOR_TIME
1722 tristate "HID Sensor Time"
1725 select HID_SENSOR_HUB
1726 select HID_SENSOR_IIO_COMMON
1728 Say yes here to build support for the HID Sensors of type Time.
1729 This drivers makes such sensors available as RTCs.
1731 If this driver is compiled as a module, it will be named
1732 rtc-hid-sensor-time.