Kconfig - OpenGrok cross reference for /linux-6.12.1/drivers/rtc/Kconfig

1 # SPDX-License-Identifier: GPL-2.0-only
14 	bool "Real Time Clock"
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
31 	  unnecessary fsck runs at boot time, and to network better.
34 	string "RTC used to set the system time"
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
49 	  be useful to reinitialize system time when resuming from system
54 	bool "Set the RTC time based on NTP synchronization"
57 	  If you say yes here, the system time (wall clock) will be stored
69 	  one can sleep when setting time, because it runs in the workqueue
141 	  once-per-second update interrupts, used for synchronization.
143 	  The emulation code will read the time from the hardware
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
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"
273 	  century bit inconditionnally but never used it when reading the time.
276 	  the time was previously set using a kernel predating this option,
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.
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.
655 	  will be called rtc-fm3130.
665 	  will be called rtc-rx8010.
675 	  called rtc-rx8111.
678 	tristate "Epson RX-8571/RX-8581"
681 	  If you say yes here you will get support for the Epson RX-8571/
682 	  RX-8581.
685 	  will be called rtc-rx8581.
688 	tristate "Epson RX-8025SA/NB"
691 	  RX-8025SA/NB RTC chips.
694 	  will be called rtc-rx8025.
703 	  will be called rtc-em3027.
713 	  will be called rtc-rv3028.
723 	  will be called rtc-rv3032.
732 	  will be called rtc-rv8803.
744 	  will be called rtc-s5m.
754 	  will be called rtc-sd2405al.
764 	  will be called rtc-sd3078
779 	  will be called rtc-m41t93.
788 	  will be called rtc-m41t94.
797 	  will be called rtc-ds1302.
803 	  and DS1306 real time clock chips. These support a trickle
807 	  will be called rtc-ds1305.
814 	  Dallas/Maxim DS1343 and DS1344 real time clock chips.
818 	  will be called rtc-ds1343.
831 	  will be called rtc-ds1347.
843 	  will be called rtc-ds1390.
855 	  will be called rtc-max6916.
858 	tristate "Epson RTC-9701JE"
861 	  Epson RTC-9701JE SPI RTC chip.
864 	  will be called rtc-r9701.
867 	tristate "Epson RX-4581"
869 	  If you say yes here you will get support for the Epson RX-4581.
872 	  will be called rtc-rx4581.
881 	  will be called rtc-rs5c348.
890 	  will be called rtc-max6902.
900 	  will be called rtc-pcf2123.
908 	  will be called rtc-mcp795.
931 	  DS3232 and DS3234 real-time clock chips. If an interrupt is associated
935 	  will be called rtc-ds3232.
943 	  rtc-ds3232
961 	  will be called rtc-pcf2127.
973 	  will be called rtc-rv3029c2.
982 	  rtc-rv3029.
985 	tristate "Epson RX-6110"
990 	  If you say yes here you will get support for the Epson RX-6110.
993 	  will be called rtc-rx6110.
1002 	tristate "PC-style 'CMOS'"
1008 	  Say "yes" here to get direct support for the real time clock
1009 	  found in every PC or ACPI-based system, and some other boards.
1020 	  will be called rtc-cmos.
1023 	bool "Alpha PC-style CMOS"
1029 	  Direct support for the real-time clock found on every Alpha
1052 	  will be called rtc-ds1511.
1062 	  will be called rtc-ds1553.
1069 	  family of real time chips.  This family includes the DS1685/DS1687,
1074 	  will be called rtc-ds1685.
1084 	  This enables support for the Dallas/Maxim DS1685/DS1687 real time
1088 	  systems, as well as EPPC-405-UC modules by electronic system design
1094 	  This enables support for the Dallas/Maxim DS1689/DS1693 real time
1099 	  Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
1108 	  This enables support for the Dallas/Maxim DS17285/DS17287 real time
1111 	  This chip features 2kb of extended NV-SRAM.  It may possibly be
1117 	  This enables support for the Dallas/Maxim DS17485/DS17487 real time
1120 	  This chip features 4kb of extended NV-SRAM.
1125 	  This enables support for the Dallas/Maxim DS17885/DS17887 real time
1128 	  This chip features 8kb of extended NV-SRAM.
1140 	  will be called rtc-ds1742.
1149 	  will be called rtc-ds2404.
1156 	  DA9052-BC and DA9053-AA/Bx PMICs.
1166 	  will be called rtc-da9055
1176 	  will be called "rtc-da9063".
1183 	  Real Time Clock.
1186 	  will be called rtc-efi.
1196 	  will be called rtc-stk17ta8.
1206 	  will be called rtc-m48t86.
1216 	  will be called "rtc-m48t35".
1229 	  will be called "rtc-m48t59".
1239 	  will be called rtc-msm6242.
1250 	  will be called rtc-bq4802.
1261 	  will be called rtc-rp5c01.
1272 	  will be called "rtc-gamecube".
1282 	  will be called "rtc-wm831x".
1292 	  will be called "rtc-wm8350".
1303 	  will be called rtc-sc27xx.
1321 	tristate "ST-Ericsson AB8500 RTC"
1326 	  Select this to enable the ST-Ericsson AB8500 power management IC RTC
1327 	  support. This chip contains a battery- and capacitor-backed RTC.
1338 	  will be called rtc-opal.
1341 	tristate "OP-TEE based RTC driver"
1344 	  Select this to get support for OP-TEE based RTC control on SoCs where
1348 	  will be called rtc-optee.
1365 	  will be called rtc-cros-ec.
1372 	  embedded controller found in certain e-book readers designed by the
1375 comment "on-CPU RTC drivers"
1385 	  will be called rtc-asm9260.
1395 	  will be called rtc-digicolor.
1398 	tristate "Freescale IMX DryIce Real Time Clock"
1405 	   will be called "rtc-imxdi".
1418 	   will be called "rtc-fsl-ftm-alarm".
1429 	   will be called "rtc-meson".
1440 	  will be called rtc-meson-vrtc.
1443 	tristate "TI OMAP Real Time Clock"
1449 	  Say "yes" here to support the on chip real time clock
1450 	  present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1453 	  will be called rtc-omap.
1466 	  will be called rtc-s3c.
1476 	  will be called rtc-ep93xx.
1482 	  If you say Y here you will get access to the real time clock
1486 	  module will be called rtc-sa1100.
1489 	tristate "SuperH On-Chip RTC"
1492 	  Say Y here to enable support for the on-chip RTC found in
1496 	  module will be called rtc-sh.
1502 	  Say 'yes' to get support for the real-time clock present in
1503 	  Sunplus SP7021 - a SoC for industrial applications. It provides
1509 	  will be called rtc-sunplus.
1519 	  module will be called rtc-pl030.
1529 	  module will be called rtc-pl031.
1546 	  Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which
1551 	  Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
1552 	  probably want to use the real RTC block instead of the "RTT as an
1559 	  This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1563 	  will be called rtc-au1xxx.
1593 	 If you say Y here you will get access to the real time clock
1604 	  If you say Y here you will get access to the real time clock
1642 	  If you say yes here you will get support for the in-chip RTC
1647 	  will be called rtc-mv.
1654 	  If you say yes here you will get support for the in-chip RTC
1658 	  will be called armada38x-rtc.
1668 	  module will be called rtc-cadence.
1679 	  will be called rtc-ftrtc010.
1688 	  will be called rtc-ps3.
1699 	  will be called rtc-stmp3xxx.
1716 	tristate "Freescale MPC5121 built-in RTC"
1720 	  built-in RTC on MPC5121 or on MPC5200.
1723 	  will be called rtc-mpc5121.
1734 	  will be called rtc-jz4740.
1737 	tristate "Loongson On-chip RTC"
1741 	  This is a driver for the Loongson on-chip Counter0 (Time-Of-Year
1743 	  It can be found on Loongson-1 series cpu, Loongson-2K series cpu
1747 	  will be called rtc-loongson.
1760 	  so, the module will be called rtc-lpc24xx.
1769 	  will be called rtc-lpc32xx.
1779 	  module will be called rtc-pm8xxx.
1789 	  will be called rtc-tegra.
1792 	tristate "Freescale MXC Real Time Clock"
1801 	   will be called "rtc-mxc".
1804 	tristate "Freescale MXC Real Time Clock for i.MX53"
1813 	   will be called "rtc-mxc_v2".
1826 	   will be called "rtc-snvs".
1838 	   will be called "rtc-bbnsm".
1849 	  module will be called rtc-imx-sm-bbm.
1868 	  module will be called rtc-st-lpc.
1878 	   will be called rtc-moxart
1884 	  This enables support for the real time clock built in the MediaTek
1888 	  will be called rtc-mt2712.
1905 	  This enables support for the real time clock built in the MediaTek
1909 	  will be called rtc-mt7622.
1912 	tristate "APM X-Gene RTC"
1916 	  If you say yes here you get support for the APM X-Gene SoC real time
1920 	  will be called "rtc-xgene".
1930 	   will be called rtc-pic32
1933 	tristate "EPSON TOYOCOM RTC-7301SF/DG"
1938 	   RTC-7301SF/DG chips.
1941 	   will be called rtc-r7301.
1954 	   If you say yes here you get support for the STM32 On-Chip
1955 	   Real Time Clock.
1958 	   will be called "rtc-stm32".
1973 	  Real Time Clock.
1980 	  If you say yes here you get support for the ASPEED BMC SoC real time
1984 	  will be called "rtc-aspeed".
1992 	  Real Time Clock for K3 architecture.
1995 	  will be called "rtc-ti-k3".
2003 	   On-Chip Real Time Clock.
2006 	   will be called "rtc-ma35d1".
2011 	tristate "HID Sensor Time"
2016 	  Say yes here to build support for the HID Sensors of type Time.
2020 	  rtc-hid-sensor-time.
2023 	tristate "Goldfish Real Time Clock"
2036 	  If you say yes here, you get read/write support for the Real Time
2046 	  If you say yes here you get support for the Mstar MSC313e On-Chip
2047 	  Real Time Clock.
2050 	  will be called "rtc-msc313".
2053 	tristate "Microchip PolarFire SoC built-in RTC"
2057 	  built-in RTC on Polarfire SoC.
2060 	  will be called "rtc-mpfs".
2067 	  If you say yes here you get support for the SigmaStar SSD202D On-Chip
2068 	  Real Time Clock.
2071 	  will be called "rtc-ssd20xd".