Kconfig - OpenGrok cross reference for /linux-6.8/drivers/rtc/Kconfig

1 # SPDX-License-Identifier: GPL-2.0-only
14 	bool "Real Time Clock"
29 	  If you say yes here, the system time (wall clock) will be set using
39 	  clock, usually rtc0. Initialization is done when the system
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
57 	  If you say yes here, the system time (wall clock) will be stored
112 	  Say yes here if you want to use your system clock RTC through
115 	  If there is no RTC for the system clock, then the first RTC(rtc0)
141 	  once-per-second update interrupts, used for synchronization.
144 	  clock several times per second, please enable this option
153 	  the time from the system clock.
159 	  will be called rtc-test.
173 	  will be called rtc-88pm860x.
183 	  will be called rtc-88pm80x.
187 	tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3"
190 	  AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip.
193 	  will be called rtc-ab-b5ze-s3.
197 	tristate "Abracon AB-RTCMC-32.768kHz-EOZ9"
200 	  AB-RTCMC-32.768kHz-EOA9 I2C RTC chip.
203 	  will be called rtc-ab-e0z9.
210 	  families of ultra-low-power  battery- and capacitor-backed real-time
211 	  clock chips.
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.
224 	  will be called rtc-ac100.
227 	tristate "Broadcom STB wake-timer"
231 	  If you say yes here you get support for the wake-timer found on
235 	  be called rtc-brcmstb-waketimer.
245 	  will be called rtc-as3722.
248 	tristate "Dallas/Maxim DS1307/37/38/39/40/41, ST M41T00, EPSON RX-8025, ISL12057"
255 	  ST M41T00, EPSON RX-8025, Intersil ISL12057 and probably other chips.
265 	  will be called rtc-ds1307.
268 	bool "Century bit support for rtc-ds1307"
285 	  DS1374 real-time clock chips. If an interrupt is associated
289 	  will be called rtc-ds1374.
298 	  real-time clock chips.
307 	  will be called rtc-ds1672.
314 	  from the usual rtc functions it provides a clock output of
318 	  will be called rtc-hym8563.
333 	  will be called rtc-max6900.
344 	  will be called rtc-max8907.
354 	  will be called rtc-max8925.
364 	  will be called rtc-max8998.
374 	  will be called rtc-max8997.
387 	  will be called rtc-max31335.
397 	  will be called rtc-max77686.
407 	   called "rtc-nct3018y".
417 	  will be called rk808-rtc.
426 	  will be called rtc-rs5c372.
435 	  will be called rtc-isl1208.
445 	  will be called rtc-isl12022.
455 	  will be called rtc-isl12026.
464 	  will be called rtc-x1205.
474 	  will be called rtc-pcf8523.
483 	  will be called rtc-pcf85063.
492 	  will be called rtc-pcf85363.
494 	  The nvmem interface will be named pcf85363-#, where # is the
495 	  zero-based instance number.
505 	  will be called rtc-pcf8563.
517 	  will be called rtc-pcf8583.
528 	  will be called rtc-m41t80.
545 	  will be called rtc-bd70528.
554 	  will be called rtc-bq32k.
574 	  will be called rtc-twl.
584 	  will be called rtc-palma.
604 	  will be called rtc-tps6594.
614 	  will be called rtc-tps65910.
624 	  will be called rtc-rc5t583.
634 	  will be called rtc-rc5t619.
637 	tristate "Seiko Instruments S-35390A"
641 	  Instruments S-35390A.
644 	  will be called rtc-s35390a.
652 	  RTC clock and FRAM. This driver provides only RTC functionality.
655 	  will be called rtc-fm3130.
665 	  will be called rtc-rx8010.
668 	tristate "Epson RX-8571/RX-8581"
671 	  If you say yes here you will get support for the Epson RX-8571/
672 	  RX-8581.
675 	  will be called rtc-rx8581.
678 	tristate "Epson RX-8025SA/NB"
681 	  RX-8025SA/NB RTC chips.
684 	  will be called rtc-rx8025.
693 	  will be called rtc-em3027.
703 	  will be called rtc-rv3028.
713 	  will be called rtc-rv3032.
722 	  will be called rtc-rv8803.
734 	  will be called rtc-s5m.
744 	  will be called rtc-sd3078
759 	  will be called rtc-m41t93.
768 	  will be called rtc-m41t94.
777 	  will be called rtc-ds1302.
783 	  and DS1306 real time clock chips. These support a trickle
784 	  charger, alarms, and NVRAM in addition to the clock.
787 	  will be called rtc-ds1305.
794 	  Dallas/Maxim DS1343 and DS1344 real time clock chips.
798 	  will be called rtc-ds1343.
811 	  will be called rtc-ds1347.
823 	  will be called rtc-ds1390.
835 	  will be called rtc-max6916.
838 	tristate "Epson RTC-9701JE"
841 	  Epson RTC-9701JE SPI RTC chip.
844 	  will be called rtc-r9701.
847 	tristate "Epson RX-4581"
849 	  If you say yes here you will get support for the Epson RX-4581.
852 	  will be called rtc-rx4581.
861 	  will be called rtc-rs5c348.
870 	  will be called rtc-max6902.
880 	  will be called rtc-pcf2123.
888 	  will be called rtc-mcp795.
911 	  DS3232 and DS3234 real-time clock chips. If an interrupt is associated
915 	  will be called rtc-ds3232.
923 	  rtc-ds3232
941 	  will be called rtc-pcf2127.
953 	  will be called rtc-rv3029c2.
962 	  rtc-rv3029.
965 	tristate "Epson RX-6110"
970 	  If you say yes here you will get support for the Epson RX-6110.
973 	  will be called rtc-rx6110.
982 	tristate "PC-style 'CMOS'"
988 	  Say "yes" here to get direct support for the real time clock
989 	  found in every PC or ACPI-based system, and some other boards.
1000 	  will be called rtc-cmos.
1003 	bool "Alpha PC-style CMOS"
1009 	  Direct support for the real-time clock found on every Alpha
1032 	  will be called rtc-ds1511.
1042 	  will be called rtc-ds1553.
1054 	  will be called rtc-ds1685.
1065 	  clock chip.
1068 	  systems, as well as EPPC-405-UC modules by electronic system design
1075 	  clock chip.
1079 	  Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
1089 	  clock chip.
1091 	  This chip features 2kb of extended NV-SRAM.  It may possibly be
1098 	  clock chip.
1100 	  This chip features 4kb of extended NV-SRAM.
1106 	  clock chip.
1108 	  This chip features 8kb of extended NV-SRAM.
1120 	  will be called rtc-ds1742.
1129 	  will be called rtc-ds2404.
1136 	  DA9052-BC and DA9053-AA/Bx PMICs.
1146 	  will be called rtc-da9055
1156 	  will be called "rtc-da9063".
1163 	  Real Time Clock.
1166 	  will be called rtc-efi.
1176 	  will be called rtc-stk17ta8.
1186 	  will be called rtc-m48t86.
1196 	  will be called "rtc-m48t35".
1209 	  will be called "rtc-m48t59".
1219 	  will be called rtc-msm6242.
1230 	  will be called rtc-bq4802.
1241 	  will be called rtc-rp5c01.
1252 	  will be called "rtc-gamecube".
1262 	  will be called "rtc-wm831x".
1272 	  will be called "rtc-wm8350".
1283 	  will be called rtc-sc27xx.
1301 	tristate "ST-Ericsson AB8500 RTC"
1306 	  Select this to enable the ST-Ericsson AB8500 power management IC RTC
1307 	  support. This chip contains a battery- and capacitor-backed RTC.
1318 	  will be called rtc-opal.
1321 	tristate "OP-TEE based RTC driver"
1324 	  Select this to get support for OP-TEE based RTC control on SoCs where
1328 	  will be called rtc-optee.
1345 	  will be called rtc-cros-ec.
1352 	  embedded controller found in certain e-book readers designed by the
1355 comment "on-CPU RTC drivers"
1365 	  will be called rtc-asm9260.
1375 	  will be called rtc-digicolor.
1378 	tristate "Freescale IMX DryIce Real Time Clock"
1385 	   will be called "rtc-imxdi".
1398 	   will be called "rtc-fsl-ftm-alarm".
1409 	   will be called "rtc-meson".
1420 	  will be called rtc-meson-vrtc.
1423 	tristate "TI OMAP Real Time Clock"
1429 	  Say "yes" here to support the on chip real time clock
1430 	  present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1433 	  will be called rtc-omap.
1440 	  RTC (Realtime Clock) driver for the clock inbuilt into the
1446 	  will be called rtc-s3c.
1456 	  will be called rtc-ep93xx.
1462 	  If you say Y here you will get access to the real time clock
1466 	  module will be called rtc-sa1100.
1469 	tristate "SuperH On-Chip RTC"
1472 	  Say Y here to enable support for the on-chip RTC found in
1476 	  module will be called rtc-sh.
1482 	  Say 'yes' to get support for the real-time clock present in
1483 	  Sunplus SP7021 - a SoC for industrial applications. It provides
1489 	  will be called rtc-sunplus.
1499 	  module will be called rtc-pl030.
1509 	  module will be called rtc-pl031.
1516 	  Driver for the internal RTC (Realtime Clock) module found on
1539 	  This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1543 	  will be called rtc-au1xxx.
1573 	 If you say Y here you will get access to the real time clock
1584 	  If you say Y here you will get access to the real time clock
1622 	  If you say yes here you will get support for the in-chip RTC
1627 	  will be called rtc-mv.
1634 	  If you say yes here you will get support for the in-chip RTC
1638 	  will be called armada38x-rtc.
1648 	  module will be called rtc-cadence.
1659 	  will be called rtc-ftrtc010.
1668 	  will be called rtc-ps3.
1679 	  will be called rtc-stmp3xxx.
1696 	tristate "Freescale MPC5121 built-in RTC"
1700 	  built-in RTC on MPC5121 or on MPC5200.
1703 	  will be called rtc-mpc5121.
1714 	  will be called rtc-jz4740.
1717 	tristate "Loongson On-chip RTC"
1721 	  This is a driver for the Loongson on-chip Counter0 (Time-Of-Year
1723 	  It can be found on Loongson-1 series cpu, Loongson-2K series cpu
1727 	  will be called rtc-loongson.
1740 	  so, the module will be called rtc-lpc24xx.
1749 	  will be called rtc-lpc32xx.
1759 	  module will be called rtc-pm8xxx.
1769 	  will be called rtc-tegra.
1772 	tristate "Freescale MXC Real Time Clock"
1781 	   will be called "rtc-mxc".
1784 	tristate "Freescale MXC Real Time Clock for i.MX53"
1793 	   will be called "rtc-mxc_v2".
1806 	   will be called "rtc-snvs".
1818 	   will be called "rtc-bbnsm".
1837 	  module will be called rtc-st-lpc.
1847 	   will be called rtc-moxart
1853 	  This enables support for the real time clock built in the MediaTek
1857 	  will be called rtc-mt2712.
1873 	  This enables support for the real time clock built in the MediaTek
1877 	  will be called rtc-mt7622.
1880 	tristate "APM X-Gene RTC"
1884 	  If you say yes here you get support for the APM X-Gene SoC real time
1885 	  clock.
1888 	  will be called "rtc-xgene".
1898 	   will be called rtc-pic32
1901 	tristate "EPSON TOYOCOM RTC-7301SF/DG"
1906 	   RTC-7301SF/DG chips.
1909 	   will be called rtc-r7301.
1916 	   If you say yes here you get support for the STM32 On-Chip
1917 	   Real Time Clock.
1920 	   will be called "rtc-stm32".
1935 	  Real Time Clock.
1946 	  will be called "rtc-aspeed".
1954 	  Real Time Clock for K3 architecture.
1957 	  will be called "rtc-ti-k3".
1965 	   On-Chip Real Time Clock.
1968 	   will be called "rtc-ma35d1".
1982 	  rtc-hid-sensor-time.
1985 	tristate "Goldfish Real Time Clock"
1999 	  Clock on the Wilco Embedded Controller (Wilco is a kind of Chromebook)
2008 	  If you say yes here you get support for the Mstar MSC313e On-Chip
2009 	  Real Time Clock.
2012 	  will be called "rtc-msc313".
2015 	tristate "Microchip PolarFire SoC built-in RTC"
2019 	  built-in RTC on Polarfire SoC.
2022 	  will be called "rtc-mpfs".
2029 	  If you say yes here you get support for the SigmaStar SSD202D On-Chip
2030 	  Real Time Clock.
2033 	  will be called "rtc-ssd20xd".