MIPS: BMIPS: Accept UHI interface for passing a dtb

Detect and use passed dtb address using the UHI interface. This allows for
booting with a vmlinux.bin appended dtb instead of using a built-in one.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: John Crispin <blogic@openwrt.org>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: James Hartley <James.Hartley@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/9742/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/bmips/setup.c b/arch/mips/bmips/setup.c
index fae800e8b1e1da28e5de2ceefbafd1b222d9e3d0..526ec2789bb9ef0ba208079d307f9580c408c7ec 100644 (file)
--- a/arch/mips/bmips/setup.c
+++ b/arch/mips/bmips/setup.c
@@ -149,6 +149,8 @@ void __init plat_mem_setup(void)
        /* intended to somewhat resemble ARM; see Documentation/arm/Booting */
        if (fw_arg0 == 0 && fw_arg1 == 0xffffffff)
                dtb = phys_to_virt(fw_arg2);
+       else if (fw_arg0 == -2) /* UHI interface */
+               dtb = (void *)fw_arg1;
        else if (__dtb_start != __dtb_end)
                dtb = (void *)__dtb_start;
        else