1 files changed, 82 insertions, 0 deletions
diff --git a/board/freescale/mx6sabreauto/README b/board/freescale/mx6sabreauto/README
new file mode 100644
index 0000000000..e8c589b92a
--- /dev/null
+++ b/board/freescale/mx6sabreauto/README
@@ -0,0 +1,82 @@
+How to use and build U-Boot on mx6sabreauto
+-------------------------------------------
+
+mx6sabreauto_defconfig target supports mx6q/mx6dl/mx6qp sabreauto variants.
+
+In order to build it:
+
+$ make mx6sabreauto_defconfig
+
+$ make
+
+This will generate the SPL and u-boot.img binaries.
+
+- Flash the SPL binary into the SD card:
+
+$ sudo dd if=SPL of=/dev/sdX bs=1K seek=1 && sync
+
+- Flash the u-boot.img binary into the SD card:
+
+$ sudo dd if=u-boot.img of=/dev/sdX bs=1K seek=69 && sync
+
+Booting via Falcon mode
+-----------------------
+
+Write in mx6sabreauto_defconfig the following define below:
+
+CONFIG_SPL_OS_BOOT=y
+
+In order to build it:
+
+$ make mx6sabreauto_defconfig
+
+$ make
+
+This will generate the SPL image called SPL and the u-boot.img.
+
+- Flash the SPL image into the SD card:
+
+$ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync
+
+- Flash the u-boot.img image into the SD card:
+
+$ sudo dd if=u-boot.img of=/dev/sdb bs=1K seek=69 && sync
+
+Create a FAT16 boot partition to store uImage and the dtb file, then copy the files there:
+
+$ sudo cp uImage /media/boot
+
+$ sudo cp imx6dl-sabreauto.dtb /media/boot
+
+Create a partition for root file system and extract it there:
+
+$ sudo tar xvf rootfs.tar.gz -C /media/root
+
+The SD card must have enough space for raw "args" and "kernel".
+To configure Falcon mode for the first time, on U-Boot do the following commands:
+
+- Load dtb file from boot partition:
+
+# load mmc 0:1 ${fdt_addr} imx6dl-sabreauto.dtb
+
+- Load kernel image from boot partition:
+
+# load mmc 0:1 ${loadaddr} uImage
+
+- Write kernel at 2MB offset:
+
+# mmc write ${loadaddr} 0x1000 0x4000
+
+- Setup kernel bootargs:
+
+# setenv bootargs "console=ttymxc3,115200 root=/dev/mmcblk0p1 rootfstype=ext4 rootwait quiet rw"
+
+- Prepare args:
+
+# spl export fdt ${loadaddr} - ${fdt_addr}
+
+- Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors)
+
+# mmc write 18000000 0x800 0x800
+
+- Restart the board and then SPL binary will launch the kernel directly.