[PATCH 1/2] MIPS: octeon: Use MIPS_MACHINE for boards without provided device tree

[Thomas Bogendoerfer <tsbogend@alpha.franken.de>]

There are older Octeon boards with ld U-Boots, which don't use and pass
a device tree to the kernel. Use MIPS_MACHINE mechanism to get a device
tree.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/cavium-octeon/setup.c | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index d2bba2fe636d..7497be7b9431 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -30,6 +30,7 @@
 #include <linux/libfdt.h>
 #include <linux/kexec.h>
 
+#include <asm/machine.h>
 #include <asm/processor.h>
 #include <asm/reboot.h>
 #include <asm/smp-ops.h>
@@ -1159,7 +1160,7 @@ void __init octeon_fill_mac_addresses(void);
 
 void __init device_tree_init(void)
 {
-	const void *fdt;
+	const void *fdt = NULL;
 	bool do_prune;
 	bool fill_mac;
 
@@ -1178,12 +1179,28 @@ void __init device_tree_init(void)
 		do_prune = false;
 		fill_mac = false;
 		pr_info("Using passed Device Tree.\n");
-	} else if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
-		fdt = &__dtb_octeon_68xx_begin;
-		do_prune = true;
-		fill_mac = true;
 	} else {
-		fdt = &__dtb_octeon_3xxx_begin;
+		const struct mips_machine *check_mach;
+
+		for_each_mips_machine(check_mach) {
+			if (!check_mach->detect)
+				continue;
+			if (!check_mach->detect())
+				continue;
+
+			fdt = check_mach->fdt;
+			do_prune = false;
+			fill_mac = true;
+			pr_info("Using compiled-in Device Tree.\n");
+			break;
+		}
+	}
+
+	if (!fdt) {
+		if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+			fdt = &__dtb_octeon_68xx_begin;
+		else
+			fdt = &__dtb_octeon_3xxx_begin;
 		do_prune = true;
 		fill_mac = true;
 	}
-- 
2.51.0