serial: earlycon: add DT support

This adds the infrastructure to generic earlycon for earlycon setup
using DT. The actual setup is not enabled until a following commit to
add the FDT parsing.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Grant Likely <grant.likely@linaro.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index b9404f6590f1..d647637cd699 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -155,6 +155,7 @@
 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
+#define EARLYCON_OF_TABLES()    OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
 
 #define KERNEL_DTB()                                                    \
         STRUCT_ALIGN();                                                 \
@@ -483,7 +484,8 @@
         CLKSRC_OF_TABLES()                                              \
         CPU_METHOD_OF_TABLES()                                          \
         KERNEL_DTB()                                                    \
-        IRQCHIP_OF_MATCH_TABLE()
+        IRQCHIP_OF_MATCH_TABLE()                                        \
+        EARLYCON_OF_TABLES()
 
 #define INIT_TEXT                                                       \
         *(.init.text)                                                   \