rockchip: rk3188: rock: adjust for SPL/TPL split

With the changes to split SPL/TPL for the RK3368, I apparently missed
some needed adjustments to the RK3188 Kconfig and rock_defconfig.

This fixes build-issues for the rock board after applying the RK3368
enablement (and SPL/TPL) set that resulted from TPL_SERIAL_SUPPORT,
TPL_ROCKCHIP_BACK_TO_BROM and TPL_TINY_MEMSET being separate symbols
now.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/mach-rockchip/Makefile

@@ -35,7 +35,9 @@ obj-y += rk_timer.o
 endif
 
 obj-$(CONFIG_ROCKCHIP_RK3036) += rk3036/
-obj-tpl-$(CONFIG_ROCKCHIP_RK3188) += rk3188/
+ifndef CONFIG_TPL_BUILD
+obj-$(CONFIG_ROCKCHIP_RK3188) += rk3188/
+endif
 obj-$(CONFIG_ROCKCHIP_RK322X) += rk322x/
 obj-$(CONFIG_ROCKCHIP_RK3288) += rk3288/
 obj-$(CONFIG_ROCKCHIP_RK3328) += rk3328/

arch/arm/mach-rockchip/rk3188/Kconfig

@@ -30,9 +30,6 @@ config TPL_LIBCOMMON_SUPPORT
 config TPL_LIBGENERIC_SUPPORT
 	default y
 
-config TPL_SERIAL_SUPPORT
-	default y
-
 source "board/radxa/rock/Kconfig"
 
 endif

configs/rock_defconfig

@@ -5,6 +5,7 @@ CONFIG_ARCH_ROCKCHIP=y
 CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_ROCKCHIP_RK3188=y
 CONFIG_SPL_ROCKCHIP_BACK_TO_BROM=y
+CONFIG_TPL_ROCKCHIP_BACK_TO_BROM=y
 CONFIG_TARGET_ROCK=y
 CONFIG_SPL_STACK_R_ADDR=0x60080000
 CONFIG_DEFAULT_DEVICE_TREE="rk3188-radxarock"
@@ -49,5 +50,6 @@ CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_SYS_NS16550=y
 CONFIG_SYSRESET=y
 CONFIG_SPL_TINY_MEMSET=y
+CONFIG_TPL_TINY_MEMSET=y
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_ERRNO_STR=y

lib/Kconfig

@@ -61,6 +61,15 @@ config SPL_TINY_MEMSET
 	  size-constrained envrionments even this may be too big. Enable this
 	  option to reduce code size slightly at the cost of some speed.
 
+config TPL_TINY_MEMSET
+	bool "Use a very small memset() in TPL"
+	help
+	  The faster memset() is the arch-specific one (if available) enabled
+	  by CONFIG_USE_ARCH_MEMSET. If that is not enabled, we can still get
+	  better performance by writing a word at a time. But in very
+	  size-constrained envrionments even this may be too big. Enable this
+	  option to reduce code size slightly at the cost of some speed.
+
 config RBTREE
 	bool