AT91SAM9 RTT as RTC
modulename: rtc-at91sam9.ko
configname: CONFIG_RTC_DRV_AT91SAM9
Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>AT91SAM9 RTT as RTC
In linux kernel since version 2.6.25 (release Date: 2008-04-16)
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.
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.
source code:
depends
CONFIG_ARCH_AT91CONFIG_RTC_CLASS or NOT CONFIG_ARCH_AT91RM9200 or NOT CONFIG_ARCH_AT91X40 or CONFIG_HAS_IOMEM or CONFIG_OF or CONFIG_ARCH_AT91 or CONFIG_COMPILE_TEST