mips: mtmips: add SPL support
This patch adds SPL support for mtmips platform. The lowlevel architecture
is split into SPL and the rest parts are built into a memory loadable
u-boot image. Optional SPL_DM and OF_CONTROL are also supported.
The increment of size is very small (< 10 KiB) if SPL_DM and OF_CONTROL are
not enabled and the memory bootable u-boot (u-boot.img) is generated
automatically so there is not need to add a separate config for it.
A lzma compressed payload (u-boot-lzma.img) is also generated and it will
be combined with u-boot-spl.bin to form the unified ROM bootable binary
u-boot-mtmips.bin.
A spl loader is added to support uncompress the payload.
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
diff --git a/arch/mips/mach-mtmips/Kconfig b/arch/mips/mach-mtmips/Kconfig
index 3f25de8..83d7648 100644
--- a/arch/mips/mach-mtmips/Kconfig
+++ b/arch/mips/mach-mtmips/Kconfig
@@ -20,8 +20,18 @@
default 32
config SYS_TEXT_BASE
+ default 0x9c000000 if !SPL
+ default 0x80200000 if SPL
+
+config SPL_TEXT_BASE
default 0x9c000000
+config SPL_PAYLOAD
+ default "u-boot-lzma.img" if SPL_LZMA
+
+config BUILD_TARGET
+ default "u-boot-with-spl.bin" if SPL
+
choice
prompt "MediaTek MIPS SoC select"
@@ -34,6 +44,15 @@
select PINCTRL_MT7628
select MTK_SERIAL
select SYSRESET_RESETCTL
+ select SPL_SEPARATE_BSS if SPL
+ select SPL_INIT_STACK_WITHOUT_MALLOC_F if SPL
+ select SPL_LOADER_SUPPORT if SPL
+ select SPL_OF_CONTROL if SPL_DM
+ select SPL_SIMPLE_BUS if SPL_DM
+ select SPL_DM_SERIAL if SPL_DM
+ select SPL_CLK if SPL_DM && SPL_SERIAL_SUPPORT
+ select SPL_SYSRESET if SPL_DM
+ select SPL_OF_LIBFDT if SPL_OF_CONTROL
help
This supports MediaTek MT7628/MT7688.
@@ -88,6 +107,14 @@
config SUPPORTS_BOOT_RAM
bool
+config SPL_UART2_SPIS_PINMUX
+ bool "Use alternative pinmux for UART2 in SPL stage"
+ depends on SPL_SERIAL_SUPPORT
+ default n
+ help
+ Select this if the UART2 of your board is connected to GPIO 16/17
+ (shared with SPIS) rather than the usual GPIO 20/21.
+
source "board/gardena/smart-gateway-mt7688/Kconfig"
source "board/seeed/linkit-smart-7688/Kconfig"