rtc: provide an emulated RTC
On a board without hardware clock this software real time clock can be
used. The build time is used to initialize the RTC. So you will have
to adjust the time either manually using the 'date' command or use
the 'sntp' to update the RTC with the time from a network time server.
See CONFIG_CMD_SNTP and CONFIG_BOOTP_NTPSERVER. The RTC time is
advanced according to CPU ticks.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 12eb449..ef66dc4 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -22,6 +22,7 @@
obj-$(CONFIG_RTC_DS174x) += ds174x.o
obj-$(CONFIG_RTC_DS3231) += ds3231.o
obj-$(CONFIG_RTC_DS3232) += ds3232.o
+obj-$(CONFIG_RTC_EMULATION) += emul_rtc.o
obj-$(CONFIG_RTC_FTRTC010) += ftrtc010.o
obj-$(CONFIG_SANDBOX) += i2c_rtc_emul.o
obj-$(CONFIG_RTC_IMXDI) += imxdi.o