\# # RTC class/drivers configuration # menu "Real Time Clock" config RTC_LIB tristate config RTC_CLASS tristate "RTC class" depends on EXPERIMENTAL default n 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 of more of the interfaces below. This driver can also be built as a module. If so, the module will be called rtc-class. config RTC_HCTOSYS bool "Set system time from RTC on startup" depends on RTC_CLASS = y default y help If you say yes here, the system time will be set using the value read from the specified RTC device. This is useful in order to avoid unnecessary fschk runs. config RTC_HCTOSYS_DEVICE string "The RTC to read the time from" depends on RTC_HCTOSYS = y default "rtc0" help The RTC device that will be used as the source for the system time, usually rtc0. comment "RTC interfaces" depends on RTC_CLASS config RTC_INTF_SYSFS tristate "sysfs" depends on RTC_CLASS && SYSFS default RTC_CLASS help Say yes here if you want to use your RTC using the sysfs interface, /sys/class/rtc/rtcX . This driver can also be built as a module. If so, the module will be called rtc-sysfs. config RTC_INTF_PROC tristate "proc" depends on RTC_CLASS && PROC_FS default RTC_CLASS help Say yes here if you want to use your RTC using the proc interface, /proc/driver/rtc . This driver can also be built as a module. If so, the module will be called rtc-proc. config RTC_INTF_DEV tristate "dev" depends on RTC_CLASS default RTC_CLASS help Say yes here if you want to use your RTC using the dev interface, /dev/rtc . This driver can also be built as a module. If so, the module will be called rtc-dev. 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 underlaying rtc chip driver did not provide RTC_UIE ioctls. comment "RTC drivers" depends on RTC_CLASS config RTC_DRV_X1205 tristate "Xicor/Intersil X1205" depends on RTC_CLASS && I2C 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_DS1307 tristate "Dallas/Maxim DS1307 and similar I2C RTC chips" depends on RTC_CLASS && 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, ST M41T00, 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. This driver may not expose all those available chip features. This driver can also be built as a module. If so, the module will be called rtc-ds1307. config RTC_DRV_DS1672 tristate "Dallas/Maxim DS1672" depends on RTC_CLASS && I2C 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_PCF8563 tristate "Philips PCF8563/Epson RTC8564" depends on RTC_CLASS && I2C 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_RS5C372 tristate "Ricoh RS5C372A/B" depends on RTC_CLASS && I2C help If you say yes here you get support for the Ricoh RS5C372A and RS5C372B RTC chips. This driver can also be built as a module. If so, the module will be called rtc-rs5c372. config RTC_DRV_M48T86 tristate "ST M48T86/Dallas DS12887" depends on RTC_CLASS 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_EP93XX tristate "Cirrus Logic EP93XX" depends on RTC_CLASS && ARCH_EP93XX 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" depends on RTC_CLASS && (ARCH_SA1100 || ARCH_PXA) 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_VR41XX tristate "NEC VR41XX" depends on RTC_CLASS && CPU_VR41XX 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_PL031 tristate "ARM AMBA PL031 RTC" depends on RTC_CLASS && ARM_AMBA help If you say Y here you will get access to ARM AMBA PrimeCell PL031 UART 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_TEST tristate "Test driver/device" depends on RTC_CLASS 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. endmenu