MIPS: BMIPS: Support APPENDED_DTB

Use appended DTB when available.

Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14337/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/bmips/setup.c b/arch/mips/bmips/setup.c
index edf1b31..3b6f687 100644 (file)
--- a/arch/mips/bmips/setup.c
+++ b/arch/mips/bmips/setup.c
@@ -17,6 +17,7 @@
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 #include <linux/of_platform.h>
+#include <linux/libfdt.h>
 #include <linux/smp.h>
 #include <asm/addrspace.h>
 #include <asm/bmips.h>
@@ -152,6 +153,8 @@ void __init plat_time_init(void)
        mips_hpt_frequency = freq;
 }
 
+extern const char __appended_dtb;
+
 void __init plat_mem_setup(void)
 {
        void *dtb;
@@ -161,6 +164,11 @@ void __init plat_mem_setup(void)
        ioport_resource.start = 0;
        ioport_resource.end = ~0;
 
+#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
+       if (!fdt_check_header(&__appended_dtb))
+               dtb = (void *)&__appended_dtb;
+       else
+#endif
        /* intended to somewhat resemble ARM; see Documentation/arm/Booting */
        if (fw_arg0 == 0 && fw_arg1 == 0xffffffff)
                dtb = phys_to_virt(fw_arg2);