rockchip: fix turning off boot-mode via Kconfig
The ROCKCHIP_BOOT_MODE_REG option defaults to a hex value, so 0 will
show as 0x0 if a default is provided and changed via Kconfig.
However, it still will show as 0, if no default is given.
Consequently, the "is set to something other than 0" test in a
Makefile is cumbersome. Instead this check can easily be performed in
the C-code.
This removes the ifeq-check from mach-rockchip/Makefile, adds a
matching #if-check to boot_mode.c and fixes resulting link issues (if
boot_mode.o was not included due to the Makefile check) by defining a
stub function (in case the functionality is not built in) for
setup_boot_mode in boot_mode.c.
Fixes: e306779 (rockchip: make boot_mode related codes reused across all platforms)
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/arch/arm/mach-rockchip/Makefile b/arch/arm/mach-rockchip/Makefile
index 2127f2b..7e1f864 100644
--- a/arch/arm/mach-rockchip/Makefile
+++ b/arch/arm/mach-rockchip/Makefile
@@ -23,9 +23,11 @@
ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TPL_BUILD),)
-ifneq ($(CONFIG_ROCKCHIP_BOOT_MODE_REG),0)
+# Always include boot_mode.o, as we bypass it (i.e. turn it off)
+# inside of boot_mode.c when CONFIG_BOOT_MODE_REG is 0. This way,
+# we can have the preprocessor correctly recognise both 0x0 and 0
+# meaning "turn it off".
obj-y += boot_mode.o
-endif
obj-$(CONFIG_ROCKCHIP_RK3188) += rk3188-board.o
obj-$(CONFIG_ROCKCHIP_RK322X) += rk322x-board.o