[PATCH 04/16] arm: stm32mp: detect U-Boot version used to save environment

[Patrick Delaunay]

Imply CONFIG_VERSION_VARIABLE for stm32mp1 target
and test U-Boot version ($env_ver) when the environment was
saved for the last time and to display warning trace.

Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
---

 arch/arm/mach-stm32mp/Kconfig |  1 +
 include/configs/stm32mp1.h    | 11 ++++++++---
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 032facff31..a86288cb76 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -67,6 +67,7 @@ config TARGET_ST_STM32MP15x
        imply DISABLE_CONSOLE
        imply PRE_CONSOLE_BUFFER
        imply SILENT_CONSOLE
+       imply VERSION_VARIABLE
        help
                target the STMicroelectronics board with SOC STM32MP15x
                managed by board/st/stm32mp1:
diff --git a/include/configs/stm32mp1.h b/include/configs/stm32mp1.h
index 42717c167e..ae060fbc4b 100644
--- a/include/configs/stm32mp1.h
+++ b/include/configs/stm32mp1.h
@@ -222,9 +222,14 @@
        "splashimage=0xc4300000\0"  \
        "ramdisk_addr_r=0xc4400000\0" \
        "altbootcmd=run bootcmd\0" \
-       "env_default=1\0" \
-       "env_check=if test $env_default -eq 1;"\
-               " then env set env_default 0;env save;fi\0" \
+       "env_check=" \
+               "env exists env_ver || env set env_ver ${ver};" \
+               "if env info -p -d -q; then env save; fi;" \
+               "if test \"$env_ver\" != \"$ver\"; then" \
+               " echo \"*** Warning: old environment ${env_ver}\";" \
+               " echo '* set default: env default -a; env save; reset';" \
+               " echo '* update current: env set env_ver ${ver}; env save';" \
+               "fi;\0" \
        STM32MP_BOOTCMD \
        STM32MP_MTDPARTS \
        STM32MP_DFU_ALT_RAM \
-- 
2.17.1