bootcount: store bootcount var in environment
If no softreset save registers are found on the hardware
"bootcount" is stored in the environment. To prevent a
saveenv on all reboots, the environment variable
"upgrade_available" is introduced. If "upgrade_available" is
0, "bootcount" is always 0 therefore no need to save the
environment on u-boot boot, if "upgrade_available" is 1 "bootcount"
is incremented in the environment and environment gets written
on u-boot start.
So the Userspace Applikation must set the "upgrade_available"
and "bootcount" variable to 0 (for example with fw_setenv),
if a boot was successfully.
Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/bootcount/Makefile b/drivers/bootcount/Makefile
index 8256ed0..d9c5695 100644
--- a/drivers/bootcount/Makefile
+++ b/drivers/bootcount/Makefile
@@ -8,3 +8,4 @@
obj-$(CONFIG_SOC_DA8XX) += bootcount_davinci.o
obj-$(CONFIG_AM33XX) += bootcount_davinci.o
obj-$(CONFIG_BOOTCOUNT_RAM) += bootcount_ram.o
+obj-$(CONFIG_BOOTCOUNT_ENV) += bootcount_env.o