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 --- include/configs/am335x_evm.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h index a3752bc..1af9b97 100644 --- a/include/configs/am335x_evm.h +++ b/include/configs/am335x_evm.h @@ -49,6 +49,7 @@ #define CONFIG_EXTRA_ENV_SETTINGS \ "loadaddr=0x80200000\0" \ "fdtaddr=0x80F80000\0" \ + "fdt_high=0xffffffff\0" \ "rdaddr=0x81000000\0" \ "bootfile=/boot/uImage\0" \ "console=ttyO0,115200n8\0" \