[mirror_ubuntu-jammy-kernel.git] / drivers / rtc / Kconfig

# 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
        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.

          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_LIB_KUNIT_TEST
        tristate "KUnit test for RTC lib functions" if !KUNIT_ALL_TESTS
        depends on KUNIT
        default KUNIT_ALL_TESTS
        help
          Enable this option to test RTC library functions.

          If unsure, say N.

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_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
        select WATCHDOG_CORE if WATCHDOG
        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 && WATCHDOG
        select WATCHDOG_CORE
        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_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 BD71815 and BD71828 PMIC RTC"
        depends on MFD_ROHM_BD71828
        help
          If you say Y here you will get support for the RTC
          block on ROHM BD71815 and BD71828 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_RC5T619
        tristate "RICOH RC5T619 RTC driver"
        depends on MFD_RN5T618
        help
          If you say yes here you get support for the RTC on the
          RICOH RC5T619 chips.

          This driver can also be built as a module. If so, the module
          will be called rtc-rc5t619.

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_RV3032
        tristate "Micro Crystal RV3032"
        select REGMAP_I2C
        help
          If you say yes here you get support for the Micro Crystal
          RV3032.

          This driver can also be built as a module. If so, the module
          will be called rtc-rv3032.

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_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.

config RTC_DRV_RX6110
        tristate "Epson RX-6110"
        depends on RTC_I2C_AND_SPI
        select REGMAP_SPI if SPI_MASTER
        select REGMAP_I2C if I2C
        help
          If you say yes here you will get support for the Epson RX-6110.

          This driver can also be built as a module. If so the module
          will be called rtc-rx6110.

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_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"
        depends on HAS_IOMEM
        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"
        depends on HAS_IOMEM
        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_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 && HAS_IOMEM
        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.

config RTC_DRV_NTXEC
        tristate "Netronix embedded controller RTC"
        depends on MFD_NTXEC
        help
          Say yes here if you want to support the RTC functionality of the
          embedded controller found in certain e-book readers designed by the
          original design manufacturer Netronix.

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
        depends on OF
        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 || COMPILE_TEST
        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_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_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
        depends on OF
        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 || SUPERH || 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_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
        depends on OF
        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_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
        depends on OF
        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_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 || COMPILE_TEST
        depends on HAS_IOMEM
        depends on OF
        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 || COMPILE_TEST
        depends on HAS_IOMEM
        depends on OF
        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 ARCH_MXC || COMPILE_TEST
        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_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_MT2712
        tristate "MediaTek MT2712 SoC based RTC"
        depends on ARCH_MEDIATEK || COMPILE_TEST
        help
          This enables support for the real time clock built in the MediaTek
          SoCs for MT2712.

          This drive can also be built as a module. If so, the module
          will be called rtc-mt2712.

config RTC_DRV_MT6397
        tristate "MediaTek PMIC based RTC"
        depends on MFD_MT6397 || (COMPILE_TEST && 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 HAS_IOMEM
        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