Kconfig - OpenGrok cross reference for /OK3568_Linux_fs/kernel/drivers/rtc/Kconfig

1 # SPDX-License-Identifier: GPL-2.0-only
3 # RTC class/drivers configuration
19 	  Generic RTC class support. If you say yes here, you will
26 	bool "Set system time from RTC on startup and resume"
30 	  the value read from a specified RTC device. This is useful to avoid
34 	string "RTC used to set the system time"
38 	  The RTC device that will be used to (re)initialize 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
50 	  sleep states. Do not specify an RTC here unless it stays powered
54 	bool "Set the RTC time based on NTP synchronization"
58 	  in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11
62 	string "RTC used to synchronize NTP adjustment"
67 	  The RTC device used for NTP synchronization. The main difference
73 	bool "RTC debug support"
75 	  Say yes here to enable debugging support in the RTC framework
76 	  and individual RTC drivers.
79 	bool "RTC non volatile storage support"
86 comment "RTC interfaces"
89 	bool "/sys/class/rtc/rtcN (sysfs)"
94 	  /sys/class/rtc/rtc0 through /sys/.../rtcN.
99 	bool "/proc/driver/rtc (procfs for rtcN)"
103 	  Say yes here if you want to use your system clock RTC through
104 	  the proc interface, /proc/driver/rtc.
106 	  If there is no RTC for the system clock, then the first RTC(rtc0)
120 	  can be accessed as /dev/rtc, which is a name
127 	bool "RTC UIE emulation on dev interface"
130 	  Provides an emulation for RTC_UIE if the underlying rtc chip
132 	  once-per-second update interrupts, used for synchronization.
142 	  RTC test driver. It's a software RTC which can be
143 	  used to test the RTC subsystem APIs. It gets
146 	  on the RTC subsystem. Please read the source code
150 	  will be called rtc-test.
152 comment "I2C RTC drivers"
160 	  If you say yes here you get support for RTC function in Marvell
164 	  will be called rtc-88pm860x.
170 	  If you say yes here you get support for RTC function in Marvell
174 	  will be called rtc-88pm80x.
178 	tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3"
181 	  AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip.
184 	  will be called rtc-ab-b5ze-s3.
188 	tristate "Abracon AB-RTCMC-32.768kHz-EOZ9"
191 	  AB-RTCMC-32.768kHz-EOA9 I2C RTC chip.
194 	  will be called rtc-ab-e0z9.
201 	  families of ultra-low-power  battery- and capacitor-backed real-time
205 	  will be called rtc-abx80x.
208 	tristate "X-Powers AC100"
211 	  If you say yes here you get support for the real-time clock found
212 	  in X-Powers AC100 family peripheral ICs.
215 	  will be called rtc-ac100.
218 	tristate "Broadcom STB wake-timer"
222 	  If you say yes here you get support for the wake-timer found on
226 	  be called rtc-brcmstb-waketimer.
229 	tristate "ams AS3722 RTC driver"
232 	  If you say yes here you get support for the RTC of ams AS3722 PMIC
236 	  will be called rtc-as3722.
239 	tristate "Dallas/Maxim DS1307/37/38/39/40/41, ST M41T00, EPSON RX-8025, ISL12057"
243 	  If you say yes here you get support for various compatible RTC
246 	  ST M41T00, EPSON RX-8025, Intersil ISL12057 and probably other chips.
247 	  In some cases the RTC must already have been initialized (by
250 	  The first seven registers on these chips hold an RTC, and other
252 	  the RTC/NVRAM backup power, and alarms. NVRAM is visible in
256 	  will be called rtc-ds1307.
259 	bool "Century bit support for rtc-ds1307"
270 	  the RTC date and then boot a kernel with this option set.
276 	  DS1374 real-time clock chips. If an interrupt is associated
280 	  will be called rtc-ds1374.
289 	  real-time clock chips.
298 	  will be called rtc-ds1672.
304 	  Say Y to enable support for the HYM8563 I2C RTC chip. Apart
305 	  from the usual rtc functions it provides a clock output of
309 	  will be called rtc-hym8563.
312 	tristate "TI LP8788 RTC driver"
315 	  Say Y to enable support for the LP8788 RTC/ALARM driver.
321 	  Maxim MAX6900 I2C RTC chip.
324 	  will be called rtc-max6900.
332 	  RTC of Maxim MAX8907 PMIC.
335 	  will be called rtc-max8907.
342 	  RTC of Maxim MAX8925 PMIC.
345 	  will be called rtc-max8925.
352 	  RTC of Maxim MAX8998 PMIC.
355 	  will be called rtc-max8998.
362 	  RTC of Maxim MAX8997 PMIC.
365 	  will be called rtc-max8997.
372 	  RTC of Maxim MAX77686/MAX77620/MAX77802 PMIC.
375 	  will be called rtc-max77686.
378 	tristate "Rockchip RK805/RK808/RK809/RK816/RK817/RK818 RTC"
382 	  RTC of RK805, RK809 and RK817, RK808, RK816 and RK818 PMIC.
385 	  will be called rk808-rtc.
388 	tristate "Rockchip RTC"
392 	  RTC of Rockchip.
395 	  will be called rtc-rockchip.
401 	  Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips.
404 	  will be called rtc-rs5c372.
410 	  Intersil ISL1208 RTC chip.
413 	  will be called rtc-isl1208.
419 	  Intersil ISL12022 RTC chip.
422 	  will be called rtc-isl12022.
429 	  Intersil ISL12026 RTC chip.
432 	  will be called rtc-isl12026.
438 	  Xicor/Intersil X1205 RTC chip.
441 	  will be called rtc-x1205.
446 	  If you say yes here you get support for the NXP PCF8523 RTC
450 	  will be called rtc-pcf8523.
456 	  If you say yes here you get support for the PCF85063 RTC chip
459 	  will be called rtc-pcf85063.
465 	  If you say yes here you get support for the PCF85363 RTC chip.
468 	  will be called rtc-pcf85363.
470 	  The nvmem interface will be named pcf85363-#, where # is the
471 	  zero-based instance number.
477 	  Philips PCF8563 RTC chip. The Epson RTC8564
481 	  will be called rtc-pcf8563.
487 	  RTC chip found on Acorn RiscPCs. This driver supports the
489 	  the RTC's SRAM. It will work on other platforms with the same
493 	  will be called rtc-pcf8583.
499 	  and M41T80 RTC chips series. Currently, the following chips are
504 	  will be called rtc-m41t80.
507 	bool "ST M41T65/M41T80 series RTC watchdog timer"
511 	  watchdog timer in the ST M41T60 and M41T80 RTC chips series.
514 	tristate "ROHM BD70528 PMIC RTC"
517 	  If you say Y here you will get support for the RTC
521 	  will be called rtc-bd70528.
527 	  BQ32000 I2C RTC chip.
530 	  will be called rtc-bq32k.
533 	tristate "TI DaVinci DM355 EVM RTC"
536 	  Supports the RTC firmware in the MSP430 on the DM355 EVM.
542 	  If you say yes here you get support for the RTC on the
552 	  If you say yes here you get support for the RTC on the
556 	  will be called rtc-twl.
559 	tristate "TI Palmas RTC driver"
562 	  If you say yes here you get support for the RTC of TI PALMA series PMIC
566 	  will be called rtc-palma.
569 	tristate "TI TPS6586X RTC driver"
572 	  TI Power Management IC TPS6586X supports RTC functionality
573 	  along with alarm. This driver supports the RTC driver for
574 	  the TPS6586X RTC module.
577 	tristate "TI TPS65910 RTC driver"
580 	  If you say yes here you get support for the RTC on the
584 	  will be called rtc-tps65910.
587 	tristate "TI TPS80031/TPS80032 RTC driver"
590 	  TI Power Management IC TPS80031 supports RTC functionality
591 	  along with alarm. This driver supports the RTC driver for
592 	  the TPS80031 RTC module.
595 	tristate "RICOH 5T583 RTC driver"
598 	  If you say yes here you get support for the RTC on the
602 	  will be called rtc-rc5t583.
605 	tristate "RICOH RC5T619 RTC driver"
608 	  If you say yes here you get support for the RTC on the
612 	  will be called rtc-rc5t619.
615 	tristate "Seiko Instruments S-35390A"
619 	  Instruments S-35390A.
622 	  will be called rtc-s35390a.
628 	  Ramtron FM3130 RTC chips.
630 	  RTC clock and FRAM. This driver provides only RTC functionality.
633 	  will be called rtc-fm3130.
639 	  If you say yes here you get support for the Epson RX8010SJ RTC
643 	  will be called rtc-rx8010.
646 	tristate "Epson RX-8571/RX-8581"
649 	  If you say yes here you will get support for the Epson RX-8571/
650 	  RX-8581.
653 	  will be called rtc-rx8581.
656 	tristate "Epson RX-8025SA/NB"
659 	  RX-8025SA/NB RTC chips.
662 	  will be called rtc-rx8025.
668 	  Microelectronic EM3027 RTC chips.
671 	  will be called rtc-em3027.
681 	  will be called rtc-rv3028.
691 	  will be called rtc-rv3032.
697 	  Epson RX8900 RTC chips.
700 	  will be called rtc-rv8803.
709 	  RTC of Samsung S2MPS14 and S5M PMIC series.
712 	  will be called rtc-s5m.
719 	  SD3078 RTC chips.
722 	  will be called rtc-sd3078
726 comment "SPI RTC drivers"
734 	  ST M41T93 SPI RTC chip.
737 	  will be called rtc-m41t93.
743 	  ST M41T94 SPI RTC chip.
746 	  will be called rtc-m41t94.
752 	  If you say yes here you get support for the Dallas DS1302 RTC chips.
755 	  will be called rtc-ds1302.
765 	  will be called rtc-ds1305.
776 	  will be called rtc-ds1343.
785 	  This driver only supports the RTC feature, and not other chip
789 	  will be called rtc-ds1347.
797 	  This driver supports the RTC feature and trickle charging but not
801 	  will be called rtc-ds1390.
807 	  Maxim MAX6916 SPI RTC chip.
809 	  This driver only supports the RTC feature, and not other chip
813 	  will be called rtc-max6916.
816 	tristate "Epson RTC-9701JE"
819 	  Epson RTC-9701JE SPI RTC chip.
822 	  will be called rtc-r9701.
825 	tristate "Epson RX-4581"
827 	  If you say yes here you will get support for the Epson RX-4581.
830 	  will be called rtc-rx4581.
833 	tristate "Epson RX-6110"
836 	  If you say yes here you will get support for the Epson RX-6610.
839 	  will be called rtc-rx6110.
845 	  Ricoh RS5C348A and RS5C348B RTC chips.
848 	  will be called rtc-rs5c348.
854 	  Maxim MAX6902 SPI RTC chip.
857 	  will be called rtc-max6902.
864 	  RTC chip.
867 	  will be called rtc-pcf2123.
875 	  will be called rtc-mcp795.
889 comment "SPI and I2C RTC drivers"
898 	  DS3232 and DS3234 real-time clock chips. If an interrupt is associated
902 	  will be called rtc-ds3232.
910 	  rtc-ds3232
919 	  If you say yes here you get support for the NXP PCF2127/29 RTC
928 	  will be called rtc-pcf2127.
937 	  RV3029 and RV3049 RTC chips.
940 	  will be called rtc-rv3029c2.
949 	  rtc-rv3029.
951 comment "Platform RTC drivers"
953 # this 'CMOS' RTC driver is arch dependent because it requires
958 	tristate "PC-style 'CMOS'"
964 	  found in every PC or ACPI-based system, and some other boards.
975 	  will be called rtc-cmos.
978 	bool "Alpha PC-style CMOS"
983 	  Direct support for the real-time clock found on every Alpha
987 	tristate "Virtual RTC for Intel MID platforms"
993 	found on Moorestown platforms. The VRTC is a emulated RTC that
994 	derives its clock source from a real RTC in the PMIC. The MC146818
1002 	  If you say yes here you get support for the Dallas DS1216 RTC chips.
1008 	  If you say yes here you get support for the Dallas DS1286 RTC chips.
1018 	  will be called rtc-ds1511.
1028 	  will be called rtc-ds1553.
1039 	  will be called rtc-ds1685.
1053 	  systems, as well as EPPC-405-UC modules by electronic system design
1062 	  This is an older RTC chip, supplanted by the DS1685/DS1687 above,
1064 	  Cycle counters, plus a customer-specific, 8-byte ROM/Serial number.
1066 	  It also works for the even older DS1688/DS1691 RTC chips, which are
1076 	  This chip features 2kb of extended NV-SRAM.  It may possibly be
1085 	  This chip features 4kb of extended NV-SRAM.
1093 	  This chip features 8kb of extended NV-SRAM.
1105 	  will be called rtc-ds1742.
1111 	  Dallas DS2404 RTC chip.
1114 	  will be called rtc-ds2404.
1117 	tristate "Dialog DA9052/DA9053 RTC"
1120 	  Say y here to support the RTC driver for Dialog Semiconductor
1121 	  DA9052-BC and DA9053-AA/Bx PMICs.
1124 	tristate "Dialog Semiconductor DA9055 RTC"
1128 	  RTC of the Dialog DA9055 PMIC.
1131 	  will be called rtc-da9055
1134 	tristate "Dialog Semiconductor DA9063/DA9062 RTC"
1137 	  If you say yes here you will get support for the RTC subsystem
1141 	  will be called "rtc-da9063".
1144 	tristate "EFI RTC"
1151 	  will be called rtc-efi.
1161 	  will be called rtc-stk17ta8.
1167 	  ST M48T86 and Dallas DS12887 RTC chips.
1170 	  will be called rtc-m48t86.
1177 	  ST M48T35 RTC chip.
1180 	  will be called "rtc-m48t35".
1187 	  ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
1193 	  will be called "rtc-m48t59".
1203 	  will be called rtc-msm6242.
1210 	  BQ4802 RTC chip.
1213 	  will be called rtc-bq4802.
1224 	  will be called rtc-rp5c01.
1230 	  EM Microelectronic v3020 RTC chip.
1233 	  will be called rtc-v3020.
1236 	tristate "Wolfson Microelectronics WM831x RTC"
1239 	  If you say yes here you will get support for the RTC subsystem
1243 	  will be called "rtc-wm831x".
1246 	tristate "Wolfson Microelectronics WM8350 RTC"
1249 	  If you say yes here you will get support for the RTC subsystem
1253 	  will be called "rtc-wm8350".
1256 	tristate "Spreadtrum SC27xx RTC"
1259 	  If you say Y here you will get support for the RTC subsystem
1264 	  will be called rtc-sc27xx.
1267 	tristate "SPEAR ST RTC"
1271 	 If you say Y here you will get support for the RTC found on
1276 	tristate "NXP PCF50633 RTC"
1278 	  If you say yes here you get support for the RTC subsystem of the
1282 	tristate "ST-Ericsson AB3100 RTC"
1286 	  Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
1287 	  support. This chip contains a battery- and capacitor-backed RTC.
1290 	tristate "ST-Ericsson AB8500 RTC"
1295 	  Select this to enable the ST-Ericsson AB8500 power management IC RTC
1296 	  support. This chip contains a battery- and capacitor-backed RTC.
1299 	tristate "IBM OPAL RTC driver"
1303 	  If you say yes here you get support for the PowerNV platform RTC
1307 	  will be called rtc-opal.
1310 	tristate "Xilinx Zynq Ultrascale+ MPSoC RTC"
1313 	  If you say yes here you get support for the RTC controller found on
1317 	tristate "Chrome OS EC RTC driver"
1321 	  Chrome OS Embedded Controller's RTC.
1324 	  will be called rtc-cros-ec.
1326 comment "on-CPU RTC drivers"
1329 	tristate "Alphascale asm9260 RTC"
1332 	  If you say yes here you get support for the RTC on the
1336 	  will be called rtc-asm9260.
1339 	tristate "TI DaVinci RTC"
1342 	  If you say yes here you get support for the RTC on the
1346 	  will be called rtc-davinci.
1349 	tristate "Conexant Digicolor RTC"
1352 	  If you say yes here you get support for the RTC on Conexant
1356 	  will be called rtc-digicolor.
1362 	   Support for Freescale IMX DryIce RTC
1365 	   will be called "rtc-imxdi".
1378 	   will be called "rtc-fsl-ftm-alarm".
1381 	tristate "Amlogic Meson RTC"
1385 	   Support for the RTC block on the Amlogic Meson6, Meson8, Meson8b
1389 	   will be called "rtc-meson".
1392 	tristate "Amlogic Meson Virtual RTC"
1397 	  Virtual RTC of Amlogic SoCs.
1400 	  will be called rtc-meson-vrtc.
1410 	  present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx.
1413 	  will be called rtc-omap.
1418 	  This will include RTC support for Samsung SoCs. If
1419 	  you want to include RTC support for any machine, kindly
1420 	  select this in the respective mach-XXXX/Kconfig file.
1423 	tristate "Samsung S3C series SoC RTC"
1426 	  RTC (Realtime Clock) driver for the clock inbuilt into the
1436 	  will be called rtc-s3c.
1443 	  RTC embedded in the Cirrus Logic EP93XX processors.
1446 	  will be called rtc-ep93xx.
1456 	  module will be called rtc-sa1100.
1459 	tristate "SuperH On-Chip RTC"
1462 	  Say Y here to enable support for the on-chip RTC found in
1463 	  most SuperH processors. This RTC is also found in RZ/A SoCs.
1466 	  module will be called rtc-sh.
1476 	  module will be called rtc-vr41xx.
1479 	tristate "ARM AMBA PL030 RTC"
1483 	  PrimeCell PL030 RTC found on certain ARM SOCs.
1486 	  module will be called rtc-pl030.
1489 	tristate "ARM AMBA PL031 RTC"
1493 	  PrimeCell PL031 RTC found on certain ARM SOCs.
1496 	  module will be called rtc-pl031.
1499 	tristate "AT91RM9200 or some AT91SAM9 RTC"
1503 	  Driver for the internal RTC (Realtime Clock) module found on
1508 	tristate "AT91SAM9 RTT as RTC"
1514 	  can be used as an RTC thanks to the backup power supply (e.g. a
1518 	  Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd
1519 	  probably want to use the real RTC block instead of the "RTT as an
1520 	  RTC" driver.
1523 	tristate "Au1xxx Counter0 RTC support"
1526 	  This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year
1527 	  counter) to be used as a RTC.
1530 	  will be called rtc-au1xxx.
1536 	  If you say yes here you get support for the Ricoh RS5C313 RTC chips.
1539 	tristate "Generic RTC support"
1540 	# Please consider writing a new RTC driver instead of using the generic
1541 	# RTC abstraction
1544 	  Say Y or M here to enable RTC support on systems using the generic
1545 	  RTC abstraction. If you do not know what you are doing, you should
1554 	 built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs
1555 	 consisting of an SA1100 compatible RTC and the extended PXA RTC.
1557 	 This RTC driver uses PXA RTC registers available since pxa27x
1561 	tristate "VIA/WonderMedia 85xx SoC RTC"
1569 	bool "SUN4V Hypervisor RTC"
1573 	  based RTC on SUN4V systems.
1576 	bool "Allwinner A31 RTC"
1581 	  If you say Y here you will get support for the RTC found in
1585 	tristate "Allwinner sun4i/sun7i RTC"
1588 	  If you say Y here you will get support for the RTC found on
1592 	bool "Starfire RTC"
1595 	  If you say Y here you will get support for the RTC found on
1602 	  Driver for the internal RTC (Realtime Clock) module found on
1606 	tristate "Marvell SoC RTC"
1609 	  If you say yes here you will get support for the in-chip RTC
1614 	  will be called rtc-mv.
1617 	tristate "Armada 38x Marvell SoC RTC"
1620 	  If you say yes here you will get support for the in-chip RTC
1624 	  will be called armada38x-rtc.
1627 	tristate "Cadence RTC driver"
1630 	  If you say Y here you will get access to Cadence RTC IP
1634 	  module will be called rtc-cadence.
1637 	tristate "Faraday Technology FTRTC010 RTC"
1645 	  will be called rtc-ftrtc010.
1648 	tristate "PS3 RTC"
1651 	  If you say yes here you will get support for the RTC on PS3.
1654 	  will be called rtc-ps3.
1657 	tristate "ST-Ericsson COH 901 331 RTC"
1660 	  If you say Y here you will get access to ST-Ericsson
1661 	  COH 901 331 RTC clock found in some ST-Ericsson Mobile
1665 	  will be called "rtc-coh901331".
1669 	tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC"
1674 	  STMP3xxx/i.MX23/i.MX28 RTC.
1677 	  will be called rtc-stmp3xxx.
1680 	tristate "PCAP RTC"
1683 	  If you say Y here you will get support for the RTC found on
1688 	tristate "Freescale MC13xxx RTC"
1694 	tristate "Freescale MPC5121 built-in RTC"
1698 	  built-in RTC on MPC5121 or on MPC5200.
1701 	  will be called rtc-mpc5121.
1704 	tristate "Ingenic JZ4740 SoC"
1708 	  If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
1712 	  will be called rtc-jz4740.
1715 	tristate "NXP RTC for LPC178x/18xx/408x/43xx"
1719 	  This enables support for the NXP RTC found which can be found on
1723 	  the hardware RTC. This driver can also be built as a module. If
1724 	  so, the module will be called rtc-lpc24xx.
1728 	tristate "NXP LPC32XX RTC"
1730 	  This enables support for the NXP RTC in the LPC32XX
1733 	  will be called rtc-lpc32xx.
1736 	tristate "Qualcomm PMIC8XXX RTC"
1740 	  Qualcomm PMIC8XXX RTC.
1743 	  module will be called rtc-pm8xxx.
1746 	tristate "NVIDIA Tegra Internal RTC driver"
1750 	  Tegra 200 series internal RTC module.
1753 	  will be called rtc-tegra.
1756 	tristate "loongson1 RTC support"
1759 	  This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year
1760 	  counter) to be used as a RTC.
1763 	  will be called rtc-ls1x.
1770 	   RTC module.
1773 	   will be called "rtc-mxc".
1783 	   will be called "rtc-mxc_v2".
1786 	tristate "Freescale SNVS RTC support"
1793 	   Low Power (LP) RTC module.
1796 	   will be called "rtc-snvs".
1801 	tristate "NXP i.MX System Controller RTC support"
1804 	   Controller RTC module.
1807 	tristate "SiRFSOC RTC"
1811 	  This driver can also be built as a module called rtc-sirfsoc.
1814 	tristate "STMicroelectronics LPC RTC"
1819 	  (LPC) based RTC support.
1822 	  module will be called rtc-st-lpc.
1825 	tristate "MOXA ART RTC"
1829 	   RTC module.
1832 	   will be called rtc-moxart
1835 	tristate "MediaTek MT2712 SoC based RTC"
1842 	  will be called rtc-mt2712.
1845 	tristate "MediaTek PMIC based RTC"
1848 	  This selects the MediaTek(R) RTC driver. RTC is part of MediaTek
1850 	  MediaTek(R) RTC driver.
1852 	  If you want to use MediaTek(R) RTC interface, select Y or M here.
1855 	tristate "MediaTek SoC based RTC"
1862 	  will be called rtc-mt7622.
1865 	tristate "APM X-Gene RTC"
1869 	  If you say yes here you get support for the APM X-Gene SoC real time
1873 	  will be called "rtc-xgene".
1876 	tristate "Microchip PIC32 RTC"
1880 	   If you say yes here you get support for the PIC32 RTC module.
1883 	   will be called rtc-pic32
1886 	tristate "EPSON TOYOCOM RTC-7301SF/DG"
1891 	   RTC-7301SF/DG chips.
1894 	   will be called rtc-r7301.
1897 	tristate "STM32 RTC"
1901 	   If you say yes here you get support for the STM32 On-Chip
1905 	   will be called "rtc-stm32".
1909 	tristate "Motorola CPCAP RTC"
1911 	   Say y here for CPCAP rtc found on some Motorola phones
1915 	bool "Realtek RTD129x RTC"
1923 	tristate "ASPEED RTC"
1931 	  will be called "rtc-aspeed".
1933 comment "HID Sensor RTC drivers"
1945 	  rtc-hid-sensor-time.
1952 	  Say yes to enable RTC driver for the Goldfish based virtual platform.
1958 	tristate "Wilco EC RTC"