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# SPDX-License-Identifier: GPL-2.0-only # # RTC class/drivers configuration # config RTC_LIB bool config RTC_MC146818_LIB bool select RTC_LIB menuconfig RTC_CLASS bool "Real Time Clock" default n depends on !S390 && !UML select RTC_LIB help Generic RTC class support. If you say yes here, you will be allowed to plug one or more RTCs to your system. You will probably want to enable one or more of the interfaces below. if RTC_CLASS config RTC_HCTOSYS bool "Set system time from RTC on startup and resume" default y help If you say yes here, the system time (wall clock) will be set using the value read from a specified RTC device. This is useful to avoid unnecessary fsck runs at boot time, and to network better. config RTC_HCTOSYS_DEVICE string "RTC used to set the system time" depends on RTC_HCTOSYS default "rtc0" help The RTC device that will be used to (re)initialize the system clock, usually rtc0. Initialization is done when the system starts up, and when it resumes from a low power state. This device should record time in UTC, since the kernel won't do timezone correction. The driver for this RTC device must be loaded before late_initcall functions run, so it must usually be statically linked. This clock should be battery-backed, so that it reads the correct time when the system boots from a power-off state. Otherwise, your system will need an external clock source (like an NTP server). If the clock you specify here is not battery backed, it may still be useful to reinitialize system time when resuming from system sleep states. Do not specify an RTC here unless it stays powered during all this system's supported sleep states. config RTC_SYSTOHC bool "Set the RTC time based on NTP synchronization" default y help If you say yes here, the system time (wall clock) will be stored in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11 minutes if userspace reports synchronized NTP status. config RTC_SYSTOHC_DEVICE string "RTC used to synchronize NTP adjustment" depends on RTC_SYSTOHC default RTC_HCTOSYS_DEVICE if RTC_HCTOSYS default "rtc0" help The RTC device used for NTP synchronization. The main difference between RTC_HCTOSYS_DEVICE and RTC_SYSTOHC_DEVICE is that this one can sleep when setting time, because it runs in the workqueue context. config RTC_DEBUG bool "RTC debug support" help Say yes here to enable debugging support in the RTC framework and individual RTC drivers. config RTC_NVMEM bool "RTC non volatile storage support" select NVMEM default RTC_CLASS help Say yes here to add support for the non volatile (often battery backed) storage present on RTCs. comment "RTC interfaces" config RTC_INTF_SYSFS bool "/sys/class/rtc/rtcN (sysfs)" depends on SYSFS default RTC_CLASS help Say yes here if you want to use your RTCs using sysfs interfaces, /sys/class/rtc/rtc0 through /sys/.../rtcN. If unsure, say Y. config RTC_INTF_PROC bool "/proc/driver/rtc (procfs for rtcN)" depends on PROC_FS default RTC_CLASS help Say yes here if you want to use your system clock RTC through the proc interface, /proc/driver/rtc. Other RTCs will not be available through that API. If there is no RTC for the system clock, then the first RTC(rtc0) is used by default. If unsure, say Y. config RTC_INTF_DEV bool "/dev/rtcN (character devices)" default RTC_CLASS help Say yes here if you want to use your RTCs using the /dev interfaces, which "udev" sets up as /dev/rtc0 through /dev/rtcN. You may want to set up a symbolic link so one of these can be accessed as /dev/rtc, which is a name expected by "hwclock" and some other programs. Recent versions of "udev" are known to set up the symlink for you. If unsure, say Y. config RTC_INTF_DEV_UIE_EMUL bool "RTC UIE emulation on dev interface" depends on RTC_INTF_DEV help Provides an emulation for RTC_UIE if the underlying rtc chip driver does not expose RTC_UIE ioctls. Those requests generate once-per-second update interrupts, used for synchronization. The emulation code will read the time from the hardware clock several times per second, please enable this option only if you know that you really need it. config RTC_DRV_TEST tristate "Test driver/device" help If you say yes here you get support for the RTC test driver. It's a software RTC which can be used to test the RTC subsystem APIs. It gets the time from the system clock. You want this driver only if you are doing development on the RTC subsystem. Please read the source code for further details. This driver can also be built as a module. If so, the module will be called rtc-test. comment "I2C RTC drivers" if I2C config RTC_DRV_88PM860X tristate "Marvell 88PM860x" depends on MFD_88PM860X help If you say yes here you get support for RTC function in Marvell 88PM860x chips. This driver can also be built as a module. If so, the module will be called rtc-88pm860x. config RTC_DRV_88PM80X tristate "Marvell 88PM80x" depends on MFD_88PM800 help If you say yes here you get support for RTC function in Marvell 88PM80x chips. This driver can also be built as a module. If so, the module will be called rtc-88pm80x. config RTC_DRV_ABB5ZES3 select REGMAP_I2C tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3" help If you say yes here you get support for the Abracon AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip. This driver can also be built as a module. If so, the module will be called rtc-ab-b5ze-s3. config RTC_DRV_ABEOZ9 select REGMAP_I2C tristate "Abracon AB-RTCMC-32.768kHz-EOZ9" help If you say yes here you get support for the Abracon AB-RTCMC-32.768kHz-EOA9 I2C RTC chip. This driver can also be built as a module. If so, the module will be called rtc-ab-e0z9. config RTC_DRV_ABX80X tristate "Abracon ABx80x" select WATCHDOG_CORE if WATCHDOG help If you say yes here you get support for Abracon AB080X and AB180X families of ultra-low-power battery- and capacitor-backed real-time clock chips. This driver can also be built as a module. If so, the module will be called rtc-abx80x. config RTC_DRV_AC100 tristate "X-Powers AC100" depends on MFD_AC100 help If you say yes here you get support for the real-time clock found in X-Powers AC100 family peripheral ICs. This driver can also be built as a module. If so, the module will be called rtc-ac100. config RTC_DRV_AM1805 tristate "Ambiq micro AM1805 RTC driver" help If you say yes here you get support for Ambiq micro AM1805 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-am1805. config RTC_DRV_BRCMSTB tristate "Broadcom STB wake-timer" depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST default ARCH_BRCMSTB || BMIPS_GENERIC help If you say yes here you get support for the wake-timer found on Broadcom STB SoCs (BCM7xxx). This driver can also be built as a module. If so, the module will be called rtc-brcmstb-waketimer. config RTC_DRV_AS3722 tristate "ams AS3722 RTC driver" depends on MFD_AS3722 help If you say yes here you get support for the RTC of ams AS3722 PMIC chips. This driver can also be built as a module. If so, the module will be called rtc-as3722. config RTC_DRV_DS1307 tristate "Dallas/Maxim DS1307/37/38/39/40/41, ST M41T00, EPSON RX-8025, ISL12057" select REGMAP_I2C help If you say yes here you get support for various compatible RTC chips (often with battery backup) connected with I2C. This driver should handle DS1307, DS1337, DS1338, DS1339, DS1340, DS1341, ST M41T00, EPSON RX-8025, Intersil ISL12057 and probably other chips. In some cases the RTC must already have been initialized (by manufacturing or a bootloader). The first seven registers on these chips hold an RTC, and other registers may add features such as NVRAM, a trickle charger for the RTC/NVRAM backup power, and alarms. NVRAM is visible in sysfs, but other chip features may not be available. This driver can also be built as a module. If so, the module will be called rtc-ds1307. config RTC_DRV_DS1307_CENTURY bool "Century bit support for rtc-ds1307" depends on RTC_DRV_DS1307 default n help The DS1307 driver suffered from a bug where it was enabling the century bit inconditionnally but never used it when reading the time. It made the driver unable to support dates beyond 2099. Setting this option will add proper support for the century bit but if the time was previously set using a kernel predating this option, reading the date will return a date in the next century. To solve that, you could boot a kernel without this option set, set the RTC date and then boot a kernel with this option set. config RTC_DRV_DS1374 tristate "Dallas/Maxim DS1374" help If you say yes here you get support for Dallas Semiconductor DS1374 real-time clock chips. If an interrupt is associated with the device, the alarm functionality is supported. This driver can also be built as a module. If so, the module will be called rtc-ds1374. config RTC_DRV_DS1374_WDT bool "Dallas/Maxim DS1374 watchdog timer" depends on RTC_DRV_DS1374 help If you say Y here you will get support for the watchdog timer in the Dallas Semiconductor DS1374 real-time clock chips. config RTC_DRV_DS1672 tristate "Dallas/Maxim DS1672" help If you say yes here you get support for the Dallas/Maxim DS1672 timekeeping chip. This driver can also be built as a module. If so, the module will be called rtc-ds1672. config RTC_DRV_HYM8563 tristate "Haoyu Microelectronics HYM8563" depends on OF help Say Y to enable support for the HYM8563 I2C RTC chip. Apart from the usual rtc functions it provides a clock output of up to 32kHz. This driver can also be built as a module. If so, the module will be called rtc-hym8563. config RTC_DRV_LP8788 tristate "TI LP8788 RTC driver" depends on MFD_LP8788 help Say Y to enable support for the LP8788 RTC/ALARM driver. config RTC_DRV_MAX6900 tristate "Maxim MAX6900" help If you say yes here you will get support for the Maxim MAX6900 I2C RTC chip. This driver can also be built as a module. If so, the module will be called rtc-max6900. config RTC_DRV_MAX8907 tristate "Maxim MAX8907" depends on MFD_MAX8907 || COMPILE_TEST select REGMAP_IRQ help If you say yes here you will get support for the RTC of Maxim MAX8907 PMIC. This driver can also be built as a module. If so, the module will be called rtc-max8907. config RTC_DRV_MAX8925 tristate "Maxim MAX8925" depends on MFD_MAX8925 help If you say yes here you will get support for the RTC of Maxim MAX8925 PMIC. This driver can also be built as a module. If so, the module will be called rtc-max8925. config RTC_DRV_MAX8998 tristate "Maxim MAX8998" depends on MFD_MAX8998 help If you say yes here you will get support for the RTC of Maxim MAX8998 PMIC. This driver can also be built as a module. If so, the module will be called rtc-max8998. config RTC_DRV_MAX8997 tristate "Maxim MAX8997" depends on MFD_MAX8997 help If you say yes here you will get support for the RTC of Maxim MAX8997 PMIC. This driver can also be built as a module. If so, the module will be called rtc-max8997. config RTC_DRV_MAX77686 tristate "Maxim MAX77686" depends on MFD_MAX77686 || MFD_MAX77620 || COMPILE_TEST help If you say yes here you will get support for the RTC of Maxim MAX77686/MAX77620/MAX77802 PMIC. This driver can also be built as a module. If so, the module will be called rtc-max77686. config RTC_DRV_MESON_VRTC tristate "Amlogic Meson Virtual RTC" depends on ARCH_MESON || COMPILE_TEST default m if ARCH_MESON help If you say yes here you will get support for the Virtual RTC of Amlogic SoCs. This driver can also be built as a module. If so, the module will be called rtc-meson-vrtc. config RTC_DRV_RK808 tristate "Rockchip RK805/RK808/RK809/RK817/RK818 RTC" depends on MFD_RK808 help If you say yes here you will get support for the RTC of RK805, RK809 and RK817, RK808 and RK818 PMIC. This driver can also be built as a module. If so, the module will be called rk808-rtc. config RTC_DRV_RS5C372 tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A" help If you say yes here you get support for the Ricoh R2025S/D, RS5C372A, RS5C372B, RV5C386, and RV5C387A RTC chips. This driver can also be built as a module. If so, the module will be called rtc-rs5c372. config RTC_DRV_ISL1208 tristate "Intersil ISL1208" help If you say yes here you get support for the Intersil ISL1208 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-isl1208. config RTC_DRV_ISL12022 tristate "Intersil ISL12022" help If you say yes here you get support for the Intersil ISL12022 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-isl12022. config RTC_DRV_ISL12026 tristate "Intersil ISL12026" depends on OF || COMPILE_TEST help If you say yes here you get support for the Intersil ISL12026 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-isl12026. config RTC_DRV_X1205 tristate "Xicor/Intersil X1205" help If you say yes here you get support for the Xicor/Intersil X1205 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-x1205. config RTC_DRV_PCF8523 tristate "NXP PCF8523" help If you say yes here you get support for the NXP PCF8523 RTC chips. This driver can also be built as a module. If so, the module will be called rtc-pcf8523. config RTC_DRV_PCF85063 tristate "NXP PCF85063" select REGMAP_I2C help If you say yes here you get support for the PCF85063 RTC chip This driver can also be built as a module. If so, the module will be called rtc-pcf85063. config RTC_DRV_PCF85363 tristate "NXP PCF85363" select REGMAP_I2C help If you say yes here you get support for the PCF85363 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-pcf85363. The nvmem interface will be named pcf85363-#, where # is the zero-based instance number. config RTC_DRV_PCF8563 tristate "Philips PCF8563/Epson RTC8564" help If you say yes here you get support for the Philips PCF8563 RTC chip. The Epson RTC8564 should work as well. This driver can also be built as a module. If so, the module will be called rtc-pcf8563. config RTC_DRV_PCF8583 tristate "Philips PCF8583" help If you say yes here you get support for the Philips PCF8583 RTC chip found on Acorn RiscPCs. This driver supports the platform specific method of retrieving the current year from the RTC's SRAM. It will work on other platforms with the same chip, but the year will probably have to be tweaked. This driver can also be built as a module. If so, the module will be called rtc-pcf8583. config RTC_DRV_M41T80 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible" help If you say Y here you will get support for the ST M41T60 and M41T80 RTC chips series. Currently, the following chips are supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84, M41ST85, M41ST87, and MicroCrystal RV4162. This driver can also be built as a module. If so, the module will be called rtc-m41t80. config RTC_DRV_M41T80_WDT bool "ST M41T65/M41T80 series RTC watchdog timer" depends on RTC_DRV_M41T80 help If you say Y here you will get support for the watchdog timer in the ST M41T60 and M41T80 RTC chips series. config RTC_DRV_BD70528 tristate "ROHM BD70528 PMIC RTC" depends on MFD_ROHM_BD70528 && (BD70528_WATCHDOG || !BD70528_WATCHDOG) help If you say Y here you will get support for the RTC on ROHM BD70528 Power Management IC. This driver can also be built as a module. If so, the module will be called rtc-bd70528. config RTC_DRV_BQ32K tristate "TI BQ32000" help If you say Y here you will get support for the TI BQ32000 I2C RTC chip. This driver can also be built as a module. If so, the module will be called rtc-bq32k. config RTC_DRV_DM355EVM tristate "TI DaVinci DM355 EVM RTC" depends on MFD_DM355EVM_MSP help Supports the RTC firmware in the MSP430 on the DM355 EVM. config RTC_DRV_TWL92330 bool "TI TWL92330/Menelaus" depends on MENELAUS help If you say yes here you get support for the RTC on the TWL92330 "Menelaus" power management chip, used with OMAP2 platforms. The support is integrated with the rest of the Menelaus driver; it's not separate module. config RTC_DRV_TWL4030 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0" depends on TWL4030_CORE depends on OF help If you say yes here you get support for the RTC on the TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms. This driver can also be built as a module. If so, the module will be called rtc-twl. config RTC_DRV_PALMAS tristate "TI Palmas RTC driver" depends on MFD_PALMAS help If you say yes here you get support for the RTC of TI PALMA series PMIC chips. This driver can also be built as a module. If so, the module will be called rtc-palma. config RTC_DRV_TPS6586X tristate "TI TPS6586X RTC driver" depends on MFD_TPS6586X help TI Power Management IC TPS6586X supports RTC functionality along with alarm. This driver supports the RTC driver for the TPS6586X RTC module. config RTC_DRV_TPS65910 tristate "TI TPS65910 RTC driver" depends on MFD_TPS65910 help If you say yes here you get support for the RTC on the TPS65910 chips. This driver can also be built as a module. If so, the module will be called rtc-tps65910. config RTC_DRV_TPS80031 tristate "TI TPS80031/TPS80032 RTC driver" depends on MFD_TPS80031 help TI Power Management IC TPS80031 supports RTC functionality along with alarm. This driver supports the RTC driver for the TPS80031 RTC module. config RTC_DRV_RC5T583 tristate "RICOH 5T583 RTC driver" depends on MFD_RC5T583 help If you say yes here you get support for the RTC on the RICOH 5T583 chips. This driver can also be built as a module. If so, the module will be called rtc-rc5t583. config RTC_DRV_S35390A tristate "Seiko Instruments S-35390A" select BITREVERSE help If you say yes here you will get support for the Seiko Instruments S-35390A. This driver can also be built as a module. If so the module will be called rtc-s35390a. config RTC_DRV_FM3130 tristate "Ramtron FM3130" help If you say Y here you will get support for the Ramtron FM3130 RTC chips. Ramtron FM3130 is a chip with two separate devices inside, RTC clock and FRAM. This driver provides only RTC functionality. This driver can also be built as a module. If so the module will be called rtc-fm3130. config RTC_DRV_RX8010 tristate "Epson RX8010SJ" select REGMAP_I2C help If you say yes here you get support for the Epson RX8010SJ RTC chip. This driver can also be built as a module. If so, the module will be called rtc-rx8010. config RTC_DRV_RX8581 tristate "Epson RX-8571/RX-8581" select REGMAP_I2C help If you say yes here you will get support for the Epson RX-8571/ RX-8581. This driver can also be built as a module. If so the module will be called rtc-rx8581. config RTC_DRV_RX8025 tristate "Epson RX-8025SA/NB" help If you say yes here you get support for the Epson RX-8025SA/NB RTC chips. This driver can also be built as a module. If so, the module will be called rtc-rx8025. config RTC_DRV_EM3027 tristate "EM Microelectronic EM3027" help If you say yes here you get support for the EM Microelectronic EM3027 RTC chips. This driver can also be built as a module. If so, the module will be called rtc-em3027. config RTC_DRV_RV3028 tristate "Micro Crystal RV3028" select REGMAP_I2C help If you say yes here you get support for the Micro Crystal RV3028. This driver can also be built as a module. If so, the module will be called rtc-rv3028. config RTC_DRV_RV8803 tristate "Micro Crystal RV8803, Epson RX8900" help If you say yes here you get support for the Micro Crystal RV8803 and Epson RX8900 RTC chips. This driver can also be built as a module. If so, the module will be called rtc-rv8803. config RTC_DRV_S5M tristate "Samsung S2M/S5M series" depends on MFD_SEC_CORE || COMPILE_TEST select REGMAP_IRQ select REGMAP_I2C help If you say yes here you will get support for the RTC of Samsung S2MPS14 and S5M PMIC series. This driver can also be built as a module. If so, the module will be called rtc-s5m. config RTC_DRV_SD3078 tristate "ZXW Shenzhen whwave SD3078" select REGMAP_I2C help If you say yes here you get support for the ZXW Shenzhen whwave SD3078 RTC chips. This driver can also be built as a module. If so, the module will be called rtc-sd3078 endif # I2C comment "SPI RTC drivers" if SPI_MASTER config RTC_DRV_M41T93 tristate "ST M41T93" help If you say yes here you will get support for the ST M41T93 SPI RTC chip. This driver can also be built as a module. If so, the module will be called rtc-m41t93. config RTC_DRV_M41T94 tristate "ST M41T94" help If you say yes here you will get support for the ST M41T94 SPI RTC chip. This driver can also be built as a module. If so, the module will be called rtc-m41t94. config RTC_DRV_DS1302 tristate "Dallas/Maxim DS1302" depends on SPI help If you say yes here you get support for the Dallas DS1302 RTC chips. This driver can also be built as a module. If so, the module will be called rtc-ds1302. config RTC_DRV_DS1305 tristate "Dallas/Maxim DS1305/DS1306" help Select this driver to get support for the Dallas/Maxim DS1305 and DS1306 real time clock chips. These support a trickle charger, alarms, and NVRAM in addition to the clock. This driver can also be built as a module. If so, the module will be called rtc-ds1305. config RTC_DRV_DS1343 select REGMAP_SPI tristate "Dallas/Maxim DS1343/DS1344" help If you say yes here you get support for the Dallas/Maxim DS1343 and DS1344 real time clock chips. Support for trickle charger, alarm is provided. This driver can also be built as a module. If so, the module will be called rtc-ds1343. config RTC_DRV_DS1347 select REGMAP_SPI tristate "Dallas/Maxim DS1347" help If you say yes here you get support for the Dallas/Maxim DS1347 chips. This driver only supports the RTC feature, and not other chip features such as alarms. This driver can also be built as a module. If so, the module will be called rtc-ds1347. config RTC_DRV_DS1390 tristate "Dallas/Maxim DS1390/93/94" help If you say yes here you get support for the Dallas/Maxim DS1390/93/94 chips. This driver supports the RTC feature and trickle charging but not other chip features such as alarms. This driver can also be built as a module. If so, the module will be called rtc-ds1390. config RTC_DRV_MAX6916 tristate "Maxim MAX6916" help If you say yes here you will get support for the Maxim MAX6916 SPI RTC chip. This driver only supports the RTC feature, and not other chip features such as alarms. This driver can also be built as a module. If so, the module will be called rtc-max6916. config RTC_DRV_R9701 tristate "Epson RTC-9701JE" help If you say yes here you will get support for the Epson RTC-9701JE SPI RTC chip. This driver can also be built as a module. If so, the module will be called rtc-r9701. config RTC_DRV_RX4581 tristate "Epson RX-4581" help If you say yes here you will get support for the Epson RX-4581. This driver can also be built as a module. If so the module will be called rtc-rx4581. config RTC_DRV_RX6110 tristate "Epson RX-6110" select REGMAP_SPI help If you say yes here you will get support for the Epson RX-6610. This driver can also be built as a module. If so the module will be called rtc-rx6110. config RTC_DRV_RS5C348 tristate "Ricoh RS5C348A/B" help If you say yes here you get support for the Ricoh RS5C348A and RS5C348B RTC chips. This driver can also be built as a module. If so, the module will be called rtc-rs5c348. config RTC_DRV_MAX6902 tristate "Maxim MAX6902" help If you say yes here you will get support for the Maxim MAX6902 SPI RTC chip. This driver can also be built as a module. If so, the module will be called rtc-max6902. config RTC_DRV_PCF2123 tristate "NXP PCF2123" select REGMAP_SPI help If you say yes here you get support for the NXP PCF2123 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-pcf2123. config RTC_DRV_MCP795 tristate "Microchip MCP795" help If you say yes here you will get support for the Microchip MCP795. This driver can also be built as a module. If so the module will be called rtc-mcp795. endif # SPI_MASTER # # Helper to resolve issues with configs that have SPI enabled but I2C # modular. See SND_SOC_I2C_AND_SPI for more information # config RTC_I2C_AND_SPI tristate default m if I2C=m default y if I2C=y default y if SPI_MASTER=y comment "SPI and I2C RTC drivers" config RTC_DRV_DS3232 tristate "Dallas/Maxim DS3232/DS3234" depends on RTC_I2C_AND_SPI select REGMAP_I2C if I2C select REGMAP_SPI if SPI_MASTER help If you say yes here you get support for Dallas Semiconductor DS3232 and DS3234 real-time clock chips. If an interrupt is associated with the device, the alarm functionality is supported. This driver can also be built as a module. If so, the module will be called rtc-ds3232. config RTC_DRV_DS3232_HWMON bool "HWMON support for Dallas/Maxim DS3232/DS3234" depends on RTC_DRV_DS3232 && HWMON && !(RTC_DRV_DS3232=y && HWMON=m) default y help Say Y here if you want to expose temperature sensor data on rtc-ds3232 config RTC_DRV_PCF2127 tristate "NXP PCF2127" depends on RTC_I2C_AND_SPI select REGMAP_I2C if I2C select REGMAP_SPI if SPI_MASTER select WATCHDOG_CORE if WATCHDOG help If you say yes here you get support for the NXP PCF2127/29 RTC chips with integrated quartz crystal for industrial applications. Both chips also have watchdog timer and tamper switch detection features. PCF2127 has an additional feature of 512 bytes battery backed memory that's accessible using nvmem interface. This driver can also be built as a module. If so, the module will be called rtc-pcf2127. config RTC_DRV_RV3029C2 tristate "Micro Crystal RV3029/3049" depends on RTC_I2C_AND_SPI select REGMAP_I2C if I2C select REGMAP_SPI if SPI_MASTER help If you say yes here you get support for the Micro Crystal RV3029 and RV3049 RTC chips. This driver can also be built as a module. If so, the module will be called rtc-rv3029c2. config RTC_DRV_RV3029_HWMON bool "HWMON support for RV3029/3049" depends on RTC_DRV_RV3029C2 && HWMON depends on !(RTC_DRV_RV3029C2=y && HWMON=m) default y help Say Y here if you want to expose temperature sensor data on rtc-rv3029. comment "Platform RTC drivers" # this 'CMOS' RTC driver is arch dependent because it requires # <asm/mc146818rtc.h> defining CMOS_READ/CMOS_WRITE, and a # global rtc_lock ... it's not yet just another platform_device. config RTC_DRV_CMOS tristate "PC-style 'CMOS'" depends on X86 || ARM || PPC || MIPS || SPARC64 default y if X86 select RTC_MC146818_LIB help Say "yes" here to get direct support for the real time clock found in every PC or ACPI-based system, and some other boards. Specifically the original MC146818, compatibles like those in PC south bridges, the DS12887 or M48T86, some multifunction or LPC bus chips, and so on. Your system will need to define the platform device used by this driver, otherwise it won't be accessible. This means you can safely enable this driver if you don't know whether or not your board has this kind of hardware. This driver can also be built as a module. If so, the module will be called rtc-cmos. config RTC_DRV_ALPHA bool "Alpha PC-style CMOS" depends on ALPHA select RTC_MC146818_LIB default y help Direct support for the real-time clock found on every Alpha system, specifically MC146818 compatibles. If in doubt, say Y. config RTC_DRV_VRTC tristate "Virtual RTC for Intel MID platforms" depends on X86_INTEL_MID default y if X86_INTEL_MID help Say "yes" here to get direct support for the real time clock found on Moorestown platforms. The VRTC is a emulated RTC that derives its clock source from a real RTC in the PMIC. The MC146818 style programming interface is mostly conserved, but any updates are done via IPC calls to the system controller FW. config RTC_DRV_DS1216 tristate "Dallas DS1216" depends on SNI_RM help If you say yes here you get support for the Dallas DS1216 RTC chips. config RTC_DRV_DS1286 tristate "Dallas DS1286" depends on HAS_IOMEM help If you say yes here you get support for the Dallas DS1286 RTC chips. config RTC_DRV_DS1511 tristate "Dallas DS1511" depends on HAS_IOMEM help If you say yes here you get support for the Dallas DS1511 timekeeping/watchdog chip. This driver can also be built as a module. If so, the module will be called rtc-ds1511. config RTC_DRV_DS1553 tristate "Maxim/Dallas DS1553" depends on HAS_IOMEM help If you say yes here you get support for the Maxim/Dallas DS1553 timekeeping chip. This driver can also be built as a module. If so, the module will be called rtc-ds1553. config RTC_DRV_DS1685_FAMILY tristate "Dallas/Maxim DS1685 Family" help If you say yes here you get support for the Dallas/Maxim DS1685 family of real time chips. This family includes the DS1685/DS1687, DS1689/DS1693, DS17285/DS17287, DS17485/DS17487, and DS17885/DS17887 chips. This driver can also be built as a module. If so, the module will be called rtc-ds1685. choice prompt "Subtype" depends on RTC_DRV_DS1685_FAMILY default RTC_DRV_DS1685 config RTC_DRV_DS1685 bool "DS1685/DS1687" help This enables support for the Dallas/Maxim DS1685/DS1687 real time clock chip. This chip is commonly found in SGI O2 (IP32) and SGI Octane (IP30) systems, as well as EPPC-405-UC modules by electronic system design GmbH. config RTC_DRV_DS1689 bool "DS1689/DS1693" help This enables support for the Dallas/Maxim DS1689/DS1693 real time clock chip. This is an older RTC chip, supplanted by the DS1685/DS1687 above, which supports a few minor features such as Vcc, Vbat, and Power Cycle counters, plus a customer-specific, 8-byte ROM/Serial number. It also works for the even older DS1688/DS1691 RTC chips, which are virtually the same and carry the same model number. Both chips have 114 bytes of user NVRAM. config RTC_DRV_DS17285 bool "DS17285/DS17287" help This enables support for the Dallas/Maxim DS17285/DS17287 real time clock chip. This chip features 2kb of extended NV-SRAM. It may possibly be found in some SGI O2 systems (rare). config RTC_DRV_DS17485 bool "DS17485/DS17487" help This enables support for the Dallas/Maxim DS17485/DS17487 real time clock chip. This chip features 4kb of extended NV-SRAM. config RTC_DRV_DS17885 bool "DS17885/DS17887" help This enables support for the Dallas/Maxim DS17885/DS17887 real time clock chip. This chip features 8kb of extended NV-SRAM. endchoice config RTC_DRV_DS1742 tristate "Maxim/Dallas DS1742/1743" depends on HAS_IOMEM help If you say yes here you get support for the Maxim/Dallas DS1742/1743 timekeeping chip. This driver can also be built as a module. If so, the module will be called rtc-ds1742. config RTC_DRV_DS2404 tristate "Maxim/Dallas DS2404" help If you say yes here you get support for the Dallas DS2404 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-ds2404. config RTC_DRV_DA9052 tristate "Dialog DA9052/DA9053 RTC" depends on PMIC_DA9052 help Say y here to support the RTC driver for Dialog Semiconductor DA9052-BC and DA9053-AA/Bx PMICs. config RTC_DRV_DA9055 tristate "Dialog Semiconductor DA9055 RTC" depends on MFD_DA9055 help If you say yes here you will get support for the RTC of the Dialog DA9055 PMIC. This driver can also be built as a module. If so, the module will be called rtc-da9055 config RTC_DRV_DA9063 tristate "Dialog Semiconductor DA9063/DA9062 RTC" depends on MFD_DA9063 || MFD_DA9062 help If you say yes here you will get support for the RTC subsystem for the Dialog Semiconductor PMIC chips DA9063 and DA9062. This driver can also be built as a module. If so, the module will be called "rtc-da9063". config RTC_DRV_EFI tristate "EFI RTC" depends on EFI && !X86 help If you say yes here you will get support for the EFI Real Time Clock. This driver can also be built as a module. If so, the module will be called rtc-efi. config RTC_DRV_STK17TA8 tristate "Simtek STK17TA8" depends on HAS_IOMEM help If you say yes here you get support for the Simtek STK17TA8 timekeeping chip. This driver can also be built as a module. If so, the module will be called rtc-stk17ta8. config RTC_DRV_M48T86 tristate "ST M48T86/Dallas DS12887" help If you say Y here you will get support for the ST M48T86 and Dallas DS12887 RTC chips. This driver can also be built as a module. If so, the module will be called rtc-m48t86. config RTC_DRV_M48T35 tristate "ST M48T35" depends on HAS_IOMEM help If you say Y here you will get support for the ST M48T35 RTC chip. This driver can also be built as a module, if so, the module will be called "rtc-m48t35". config RTC_DRV_M48T59 tristate "ST M48T59/M48T08/M48T02" depends on HAS_IOMEM help If you say Y here you will get support for the ST M48T59 RTC chip and compatible ST M48T08 and M48T02. These chips are usually found in Sun SPARC and UltraSPARC workstations. This driver can also be built as a module, if so, the module will be called "rtc-m48t59". config RTC_DRV_MSM6242 tristate "Oki MSM6242" depends on HAS_IOMEM help If you say yes here you get support for the Oki MSM6242 timekeeping chip. It is used in some Amiga models (e.g. A2000). This driver can also be built as a module. If so, the module will be called rtc-msm6242. config RTC_DRV_BQ4802 tristate "TI BQ4802" depends on HAS_IOMEM help If you say Y here you will get support for the TI BQ4802 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-bq4802. config RTC_DRV_RP5C01 tristate "Ricoh RP5C01" depends on HAS_IOMEM help If you say yes here you get support for the Ricoh RP5C01 timekeeping chip. It is used in some Amiga models (e.g. A3000 and A4000). This driver can also be built as a module. If so, the module will be called rtc-rp5c01. config RTC_DRV_V3020 tristate "EM Microelectronic V3020" help If you say yes here you will get support for the EM Microelectronic v3020 RTC chip. This driver can also be built as a module. If so, the module will be called rtc-v3020. config RTC_DRV_WM831X tristate "Wolfson Microelectronics WM831x RTC" depends on MFD_WM831X help If you say yes here you will get support for the RTC subsystem of the Wolfson Microelectronics WM831X series PMICs. This driver can also be built as a module. If so, the module will be called "rtc-wm831x". config RTC_DRV_WM8350 tristate "Wolfson Microelectronics WM8350 RTC" depends on MFD_WM8350 help If you say yes here you will get support for the RTC subsystem of the Wolfson Microelectronics WM8350. This driver can also be built as a module. If so, the module will be called "rtc-wm8350". config RTC_DRV_SC27XX tristate "Spreadtrum SC27xx RTC" depends on MFD_SC27XX_PMIC || COMPILE_TEST help If you say Y here you will get support for the RTC subsystem of the Spreadtrum SC27xx series PMICs. The SC27xx series PMICs includes the SC2720, SC2721, SC2723, SC2730 and SC2731 chips. This driver can also be built as a module. If so, the module will be called rtc-sc27xx. config RTC_DRV_SPEAR tristate "SPEAR ST RTC" depends on PLAT_SPEAR || COMPILE_TEST default y help If you say Y here you will get support for the RTC found on spear config RTC_DRV_PCF50633 depends on MFD_PCF50633 tristate "NXP PCF50633 RTC" help If you say yes here you get support for the RTC subsystem of the NXP PCF50633 used in embedded systems. config RTC_DRV_AB3100 tristate "ST-Ericsson AB3100 RTC" depends on AB3100_CORE default y if AB3100_CORE help Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC support. This chip contains a battery- and capacitor-backed RTC. config RTC_DRV_AB8500 tristate "ST-Ericsson AB8500 RTC" depends on AB8500_CORE select RTC_INTF_DEV select RTC_INTF_DEV_UIE_EMUL help Select this to enable the ST-Ericsson AB8500 power management IC RTC support. This chip contains a battery- and capacitor-backed RTC. config RTC_DRV_OPAL tristate "IBM OPAL RTC driver" depends on PPC_POWERNV default y help If you say yes here you get support for the PowerNV platform RTC driver based on OPAL interfaces. This driver can also be built as a module. If so, the module will be called rtc-opal. config RTC_DRV_ZYNQMP tristate "Xilinx Zynq Ultrascale+ MPSoC RTC" depends on OF help If you say yes here you get support for the RTC controller found on Xilinx Zynq Ultrascale+ MPSoC. config RTC_DRV_CROS_EC tristate "Chrome OS EC RTC driver" depends on CROS_EC help If you say yes here you will get support for the Chrome OS Embedded Controller's RTC. This driver can also be built as a module. If so, the module will be called rtc-cros-ec. comment "on-CPU RTC drivers" config RTC_DRV_ASM9260 tristate "Alphascale asm9260 RTC" depends on MACH_ASM9260 || COMPILE_TEST help If you say yes here you get support for the RTC on the Alphascale asm9260 SoC. This driver can also be built as a module. If so, the module will be called rtc-asm9260. config RTC_DRV_DAVINCI tristate "TI DaVinci RTC" depends on ARCH_DAVINCI_DM365 || COMPILE_TEST help If you say yes here you get support for the RTC on the DaVinci platforms (DM365). This driver can also be built as a module. If so, the module will be called rtc-davinci. config RTC_DRV_DIGICOLOR tristate "Conexant Digicolor RTC" depends on ARCH_DIGICOLOR || COMPILE_TEST help If you say yes here you get support for the RTC on Conexant Digicolor platforms. This currently includes the CX92755 SoC. This driver can also be built as a module. If so, the module will be called rtc-digicolor. config RTC_DRV_IMXDI tristate "Freescale IMX DryIce Real Time Clock" depends on ARCH_MXC help Support for Freescale IMX DryIce RTC This driver can also be built as a module, if so, the module will be called "rtc-imxdi". config RTC_DRV_FSL_FTM_ALARM tristate "Freescale FlexTimer alarm timer" depends on ARCH_LAYERSCAPE || SOC_LS1021A select FSL_RCPM default y help For the FlexTimer in LS1012A, LS1021A, LS1028A, LS1043A, LS1046A, LS1088A, LS208xA, we can use FTM as the wakeup source. Say y here to enable FTM alarm support. The FTM alarm provides alarm functions for wakeup system from deep sleep. This driver can also be built as a module, if so, the module will be called "rtc-fsl-ftm-alarm". config RTC_DRV_MESON tristate "Amlogic Meson RTC" depends on (ARM && ARCH_MESON) || COMPILE_TEST select REGMAP_MMIO help Support for the RTC block on the Amlogic Meson6, Meson8, Meson8b and Meson8m2 SoCs. This driver can also be built as a module, if so, the module will be called "rtc-meson". config RTC_DRV_OMAP tristate "TI OMAP Real Time Clock" depends on ARCH_OMAP || ARCH_DAVINCI || COMPILE_TEST depends on OF depends on PINCTRL select GENERIC_PINCONF help Say "yes" here to support the on chip real time clock present on TI OMAP1, AM33xx, DA8xx/OMAP-L13x, AM43xx and DRA7xx. This driver can also be built as a module, if so, module will be called rtc-omap. config HAVE_S3C_RTC bool help This will include RTC support for Samsung SoCs. If you want to include RTC support for any machine, kindly select this in the respective mach-XXXX/Kconfig file. config RTC_DRV_S3C tristate "Samsung S3C series SoC RTC" depends on ARCH_S3C64XX || HAVE_S3C_RTC || COMPILE_TEST help RTC (Realtime Clock) driver for the clock inbuilt into the Samsung S3C24XX series of SoCs. This can provide periodic interrupt rates from 1Hz to 64Hz for user programs, and wakeup from Alarm. The driver currently supports the common features on all the S3C24XX range, such as the S3C2410, S3C2412, S3C2413, S3C2440 and S3C2442. This driver can also be build as a module. If so, the module will be called rtc-s3c. config RTC_DRV_EP93XX tristate "Cirrus Logic EP93XX" depends on ARCH_EP93XX || COMPILE_TEST help If you say yes here you get support for the RTC embedded in the Cirrus Logic EP93XX processors. This driver can also be built as a module. If so, the module will be called rtc-ep93xx. config RTC_DRV_SA1100 tristate "SA11x0/PXA2xx/PXA910" depends on ARCH_SA1100 || ARCH_PXA || ARCH_MMP help If you say Y here you will get access to the real time clock built into your SA11x0 or PXA2xx CPU. To compile this driver as a module, choose M here: the module will be called rtc-sa1100. config RTC_DRV_SH tristate "SuperH On-Chip RTC" depends on SUPERH || ARCH_RENESAS help Say Y here to enable support for the on-chip RTC found in most SuperH processors. This RTC is also found in RZ/A SoCs. To compile this driver as a module, choose M here: the module will be called rtc-sh. config RTC_DRV_VR41XX tristate "NEC VR41XX" depends on CPU_VR41XX || COMPILE_TEST help If you say Y here you will get access to the real time clock built into your NEC VR41XX CPU. To compile this driver as a module, choose M here: the module will be called rtc-vr41xx. config RTC_DRV_PL030 tristate "ARM AMBA PL030 RTC" depends on ARM_AMBA help If you say Y here you will get access to ARM AMBA PrimeCell PL030 RTC found on certain ARM SOCs. To compile this driver as a module, choose M here: the module will be called rtc-pl030. config RTC_DRV_PL031 tristate "ARM AMBA PL031 RTC" depends on ARM_AMBA help If you say Y here you will get access to ARM AMBA PrimeCell PL031 RTC found on certain ARM SOCs. To compile this driver as a module, choose M here: the module will be called rtc-pl031. config RTC_DRV_AT91RM9200 tristate "AT91RM9200 or some AT91SAM9 RTC" depends on ARCH_AT91 || COMPILE_TEST help Driver for the internal RTC (Realtime Clock) module found on Atmel AT91RM9200's and some AT91SAM9 chips. On AT91SAM9 chips this is powered by the backup power supply. config RTC_DRV_AT91SAM9 tristate "AT91SAM9 RTT as RTC" depends on ARCH_AT91 || COMPILE_TEST depends on OF && HAS_IOMEM select MFD_SYSCON help Some AT91SAM9 SoCs provide an RTT (Real Time Timer) block which can be used as an RTC thanks to the backup power supply (e.g. a small coin cell battery) which keeps this block and the GPBR (General Purpose Backup Registers) block powered when the device is shutdown. Some AT91SAM9 SoCs provide a real RTC block, on those ones you'd probably want to use the real RTC block instead of the "RTT as an RTC" driver. config RTC_DRV_AU1XXX tristate "Au1xxx Counter0 RTC support" depends on MIPS_ALCHEMY help This is a driver for the Au1xxx on-chip Counter0 (Time-Of-Year counter) to be used as a RTC. This driver can also be built as a module. If so, the module will be called rtc-au1xxx. config RTC_DRV_RS5C313 tristate "Ricoh RS5C313" depends on SH_LANDISK help If you say yes here you get support for the Ricoh RS5C313 RTC chips. config RTC_DRV_GENERIC tristate "Generic RTC support" # Please consider writing a new RTC driver instead of using the generic # RTC abstraction depends on PARISC || M68K || PPC || SUPERH32 || COMPILE_TEST help Say Y or M here to enable RTC support on systems using the generic RTC abstraction. If you do not know what you are doing, you should just say Y. config RTC_DRV_PXA tristate "PXA27x/PXA3xx" depends on ARCH_PXA select RTC_DRV_SA1100 help If you say Y here you will get access to the real time clock built into your PXA27x or PXA3xx CPU. This RTC is actually 2 RTCs consisting of an SA1100 compatible RTC and the extended PXA RTC. This RTC driver uses PXA RTC registers available since pxa27x series (RDxR, RYxR) instead of legacy RCNR, RTAR. config RTC_DRV_VT8500 tristate "VIA/WonderMedia 85xx SoC RTC" depends on ARCH_VT8500 || COMPILE_TEST help If you say Y here you will get access to the real time clock built into your VIA VT8500 SoC or its relatives. config RTC_DRV_SUN4V bool "SUN4V Hypervisor RTC" depends on SPARC64 help If you say Y here you will get support for the Hypervisor based RTC on SUN4V systems. config RTC_DRV_SUN6I bool "Allwinner A31 RTC" default MACH_SUN6I || MACH_SUN8I depends on COMMON_CLK depends on ARCH_SUNXI || COMPILE_TEST help If you say Y here you will get support for the RTC found in some Allwinner SoCs like the A31 or the A64. config RTC_DRV_SUNXI tristate "Allwinner sun4i/sun7i RTC" depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST help If you say Y here you will get support for the RTC found on Allwinner A10/A20. config RTC_DRV_STARFIRE bool "Starfire RTC" depends on SPARC64 help If you say Y here you will get support for the RTC found on Starfire systems. config RTC_DRV_TX4939 tristate "TX4939 SoC" depends on SOC_TX4939 || COMPILE_TEST help Driver for the internal RTC (Realtime Clock) module found on Toshiba TX4939 SoC. config RTC_DRV_MV tristate "Marvell SoC RTC" depends on ARCH_DOVE || ARCH_MVEBU || COMPILE_TEST help If you say yes here you will get support for the in-chip RTC that can be found in some of Marvell's SoC devices, such as the Kirkwood 88F6281 and 88F6192. This driver can also be built as a module. If so, the module will be called rtc-mv. config RTC_DRV_ARMADA38X tristate "Armada 38x Marvell SoC RTC" depends on ARCH_MVEBU || COMPILE_TEST help If you say yes here you will get support for the in-chip RTC that can be found in the Armada 38x Marvell's SoC device This driver can also be built as a module. If so, the module will be called armada38x-rtc. config RTC_DRV_CADENCE tristate "Cadence RTC driver" depends on OF && HAS_IOMEM help If you say Y here you will get access to Cadence RTC IP found on certain SOCs. To compile this driver as a module, choose M here: the module will be called rtc-cadence. config RTC_DRV_FTRTC010 tristate "Faraday Technology FTRTC010 RTC" depends on HAS_IOMEM default ARCH_GEMINI help If you say Y here you will get support for the Faraday Technolog FTRTC010 found on e.g. Gemini SoC's. This driver can also be built as a module. If so, the module will be called rtc-ftrtc010. config RTC_DRV_PS3 tristate "PS3 RTC" depends on PPC_PS3 help If you say yes here you will get support for the RTC on PS3. This driver can also be built as a module. If so, the module will be called rtc-ps3. config RTC_DRV_COH901331 tristate "ST-Ericsson COH 901 331 RTC" depends on ARCH_U300 || COMPILE_TEST help If you say Y here you will get access to ST-Ericsson COH 901 331 RTC clock found in some ST-Ericsson Mobile Platforms. This driver can also be built as a module. If so, the module will be called "rtc-coh901331". config RTC_DRV_STMP tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC" depends on ARCH_MXS || COMPILE_TEST select STMP_DEVICE help If you say yes here you will get support for the onboard STMP3xxx/i.MX23/i.MX28 RTC. This driver can also be built as a module. If so, the module will be called rtc-stmp3xxx. config RTC_DRV_PCAP tristate "PCAP RTC" depends on EZX_PCAP help If you say Y here you will get support for the RTC found on the PCAP2 ASIC used on some Motorola phones. config RTC_DRV_MC13XXX depends on MFD_MC13XXX tristate "Freescale MC13xxx RTC" help This enables support for the RTCs found on Freescale's PMICs MC13783 and MC13892. config RTC_DRV_MPC5121 tristate "Freescale MPC5121 built-in RTC" depends on PPC_MPC512x || PPC_MPC52xx help If you say yes here you will get support for the built-in RTC on MPC5121 or on MPC5200. This driver can also be built as a module. If so, the module will be called rtc-mpc5121. config RTC_DRV_JZ4740 tristate "Ingenic JZ4740 SoC" depends on MIPS || COMPILE_TEST help If you say yes here you get support for the Ingenic JZ47xx SoCs RTC controllers. This driver can also be built as a module. If so, the module will be called rtc-jz4740. config RTC_DRV_LPC24XX tristate "NXP RTC for LPC178x/18xx/408x/43xx" depends on ARCH_LPC18XX || COMPILE_TEST depends on OF && HAS_IOMEM help This enables support for the NXP RTC found which can be found on NXP LPC178x/18xx/408x/43xx devices. If you have one of the devices above enable this driver to use the hardware RTC. This driver can also be built as a module. If so, the module will be called rtc-lpc24xx. config RTC_DRV_LPC32XX depends on ARCH_LPC32XX || COMPILE_TEST tristate "NXP LPC32XX RTC" help This enables support for the NXP RTC in the LPC32XX This driver can also be built as a module. If so, the module will be called rtc-lpc32xx. config RTC_DRV_PM8XXX tristate "Qualcomm PMIC8XXX RTC" depends on MFD_PM8XXX || MFD_SPMI_PMIC || COMPILE_TEST help If you say yes here you get support for the Qualcomm PMIC8XXX RTC. To compile this driver as a module, choose M here: the module will be called rtc-pm8xxx. config RTC_DRV_TEGRA tristate "NVIDIA Tegra Internal RTC driver" depends on ARCH_TEGRA || COMPILE_TEST help If you say yes here you get support for the Tegra 200 series internal RTC module. This drive can also be built as a module. If so, the module will be called rtc-tegra. config RTC_DRV_PUV3 tristate "PKUnity v3 RTC support" depends on ARCH_PUV3 help This enables support for the RTC in the PKUnity-v3 SoCs. This drive can also be built as a module. If so, the module will be called rtc-puv3. config RTC_DRV_LOONGSON1 tristate "loongson1 RTC support" depends on MACH_LOONGSON32 help This is a driver for the loongson1 on-chip Counter0 (Time-Of-Year counter) to be used as a RTC. This driver can also be built as a module. If so, the module will be called rtc-ls1x. config RTC_DRV_MXC tristate "Freescale MXC Real Time Clock" depends on ARCH_MXC help If you say yes here you get support for the Freescale MXC RTC module. This driver can also be built as a module, if so, the module will be called "rtc-mxc". config RTC_DRV_MXC_V2 tristate "Freescale MXC Real Time Clock for i.MX53" depends on ARCH_MXC help If you say yes here you get support for the Freescale MXC SRTC module in i.MX53 processor. This driver can also be built as a module, if so, the module will be called "rtc-mxc_v2". config RTC_DRV_SNVS tristate "Freescale SNVS RTC support" select REGMAP_MMIO depends on HAS_IOMEM depends on OF help If you say yes here you get support for the Freescale SNVS Low Power (LP) RTC module. This driver can also be built as a module, if so, the module will be called "rtc-snvs". config RTC_DRV_IMX_SC depends on IMX_SCU depends on HAVE_ARM_SMCCC tristate "NXP i.MX System Controller RTC support" help If you say yes here you get support for the NXP i.MX System Controller RTC module. config RTC_DRV_SIRFSOC tristate "SiRFSOC RTC" depends on ARCH_SIRF help Say "yes" here to support the real time clock on SiRF SOC chips. This driver can also be built as a module called rtc-sirfsoc. config RTC_DRV_ST_LPC tristate "STMicroelectronics LPC RTC" depends on ARCH_STI depends on OF help Say Y here to include STMicroelectronics Low Power Controller (LPC) based RTC support. To compile this driver as a module, choose M here: the module will be called rtc-st-lpc. config RTC_DRV_MOXART tristate "MOXA ART RTC" depends on ARCH_MOXART || COMPILE_TEST help If you say yes here you get support for the MOXA ART RTC module. This driver can also be built as a module. If so, the module will be called rtc-moxart config RTC_DRV_MT6397 tristate "MediaTek PMIC based RTC" depends on MFD_MT6397 || COMPILE_TEST select IRQ_DOMAIN help This selects the MediaTek(R) RTC driver. RTC is part of MediaTek MT6397 PMIC. You should enable MT6397 PMIC MFD before select MediaTek(R) RTC driver. If you want to use MediaTek(R) RTC interface, select Y or M here. config RTC_DRV_MT7622 tristate "MediaTek SoC based RTC" depends on ARCH_MEDIATEK || COMPILE_TEST help This enables support for the real time clock built in the MediaTek SoCs. This drive can also be built as a module. If so, the module will be called rtc-mt7622. config RTC_DRV_XGENE tristate "APM X-Gene RTC" depends on HAS_IOMEM depends on ARCH_XGENE || COMPILE_TEST help If you say yes here you get support for the APM X-Gene SoC real time clock. This driver can also be built as a module, if so, the module will be called "rtc-xgene". config RTC_DRV_PIC32 tristate "Microchip PIC32 RTC" depends on MACH_PIC32 default y help If you say yes here you get support for the PIC32 RTC module. This driver can also be built as a module. If so, the module will be called rtc-pic32 config RTC_DRV_R7301 tristate "EPSON TOYOCOM RTC-7301SF/DG" select REGMAP_MMIO depends on OF && HAS_IOMEM help If you say yes here you get support for the EPSON TOYOCOM RTC-7301SF/DG chips. This driver can also be built as a module. If so, the module will be called rtc-r7301. config RTC_DRV_STM32 tristate "STM32 RTC" select REGMAP_MMIO depends on ARCH_STM32 || COMPILE_TEST help If you say yes here you get support for the STM32 On-Chip Real Time Clock. This driver can also be built as a module, if so, the module will be called "rtc-stm32". config RTC_DRV_CPCAP depends on MFD_CPCAP tristate "Motorola CPCAP RTC" help Say y here for CPCAP rtc found on some Motorola phones and tablets such as Droid 4. config RTC_DRV_RTD119X bool "Realtek RTD129x RTC" depends on ARCH_REALTEK || COMPILE_TEST default ARCH_REALTEK help If you say yes here, you get support for the RTD1295 SoC Real Time Clock. config RTC_DRV_ASPEED tristate "ASPEED RTC" depends on OF depends on ARCH_ASPEED || COMPILE_TEST help If you say yes here you get support for the ASPEED BMC SoC real time clocks. This driver can also be built as a module, if so, the module will be called "rtc-aspeed". comment "HID Sensor RTC drivers" config RTC_DRV_HID_SENSOR_TIME tristate "HID Sensor Time" depends on USB_HID depends on HID_SENSOR_HUB && IIO select HID_SENSOR_IIO_COMMON help Say yes here to build support for the HID Sensors of type Time. This drivers makes such sensors available as RTCs. If this driver is compiled as a module, it will be named rtc-hid-sensor-time. config RTC_DRV_GOLDFISH tristate "Goldfish Real Time Clock" depends on OF && HAS_IOMEM depends on GOLDFISH || COMPILE_TEST help Say yes to enable RTC driver for the Goldfish based virtual platform. Goldfish is a code name for the virtual platform developed by Google for Android emulation. config RTC_DRV_WILCO_EC tristate "Wilco EC RTC" depends on WILCO_EC default m help If you say yes here, you get read/write support for the Real Time Clock on the Wilco Embedded Controller (Wilco is a kind of Chromebook) This can also be built as a module. If so, the module will be named "rtc_wilco_ec". endif # RTC_CLASS