Reuse the early printk code to support the serial in zboot. We copy
early_printk.c instead of referencing it because we need to build a
different object file for the normal kernel and zboot.

Signed-off-by: Alban Bedel <[email protected]>
---
 arch/mips/Kconfig                  | 2 +-
 arch/mips/boot/compressed/Makefile | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index ef1d665..bb2987b 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -138,7 +138,7 @@ config ATH79
        select SYS_SUPPORTS_32BIT_KERNEL
        select SYS_SUPPORTS_BIG_ENDIAN
        select SYS_SUPPORTS_MIPS16
-       select SYS_SUPPORTS_ZBOOT
+       select SYS_SUPPORTS_ZBOOT_UART_PROM
        select USE_OF
        help
          Support for the Atheros AR71XX/AR724X/AR913X SoCs.
diff --git a/arch/mips/boot/compressed/Makefile 
b/arch/mips/boot/compressed/Makefile
index 4eff1ef..f648bf7 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -37,8 +37,12 @@ vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT)               += 
$(obj)/dbg.o
 vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
 vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART_PROM) += $(obj)/uart-prom.o
 vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY)                += $(obj)/uart-alchemy.o
+vmlinuzobjs-$(CONFIG_ATH79)                       += $(obj)/uart-ath79.o
 endif
 
+$(obj)/uart-ath79.c: $(srctree)/arch/mips/ath79/early_printk.c
+       $(call cmd,shipped)
+
 vmlinuzobjs-$(CONFIG_KERNEL_XZ) += $(obj)/ashldi3.o
 
 $(obj)/ashldi3.o: KBUILD_CFLAGS += -I$(srctree)/arch/mips/lib
-- 
2.0.0

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