AM335X: Set fdt_high for AM335X devices to enable booting with Device Tree

For AM335X boards, such as the EVM and Bone Linux kernel fails to
locate the device tree blob on boot. The reason being is that
u-boot is copying the DT blob to the upper part of RAM when booting
the kernel and the kernel is unable to access the blob.
By setting the fdt_high variable to 0xffffffff (to prevent the copy)
the kernel is able to locate the DT blob and boot.

This patch is tested on BeagleBone platform.

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Cc: Tom Rini <trini@ti.com>

diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index 72459d859d18e5e1c8a7ecc7a9d71113e54607f0..33ee2c49d5b685adf94340a71e9dc7d89d3e4dee 100644 (file)
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -52,6 +52,7 @@
 #define CONFIG_EXTRA_ENV_SETTINGS \
        "loadaddr=0x80200000\0" \
        "fdtaddr=0x80F80000\0" \
+       "fdt_high=0xffffffff\0" \
        "rdaddr=0x81000000\0" \
        "bootfile=/boot/uImage\0" \
        "fdtfile=\0" \