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UPSTREAM: 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)
Change-Id: I5299469103d139a90b8c073779d872ef131c3b42
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
(cherry picked from commit f07d76c00d1fe05baad1599d01d07a9226498923)
This commit is contained in:
Philipp Tomsich 2017-11-24 14:44:58 +01:00 committed by Kever Yang
parent 88af3643af
commit a366cf931d
2 changed files with 15 additions and 2 deletions
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6
arch/arm/mach-rockchip/Makefile
View File

@ -28,9 +28,11 @@ obj-spl-$(CONFIG_ROCKCHIP_RK3399) += rk3399-board-spl.o spl-boot-order.o
ifeq ($(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-$(CONFIG_ROCKCHIP_CRC) += rockchip_crc.o
obj-$(CONFIG_ROCKCHIP_SMCCC) += rockchip_smccc.o

11
arch/arm/mach-rockchip/boot_mode.c
View File

@ -15,6 +15,15 @@
DECLARE_GLOBAL_DATA_PTR;
#if (CONFIG_ROCKCHIP_BOOT_MODE_REG == 0)
int setup_boot_mode(void)
{
return 0;
}
#else
void set_back_to_bootrom_dnl_flag(void)
{
writel(BOOT_BROM_DOWNLOAD, CONFIG_ROCKCHIP_BOOT_MODE_REG);
@ -119,3 +128,5 @@ int setup_boot_mode(void)
return 0;
}
#endif