imx: ventana: add EMMC configuration
Prepare for boards with EMMC instead of NAND flash
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/gateworks/gw_ventana/README b/board/gateworks/gw_ventana/README
index f3f8998..57c64a1 100644
--- a/board/gateworks/gw_ventana/README
+++ b/board/gateworks/gw_ventana/README
@@ -30,9 +30,14 @@
To build U-Boot for the Gateworks Ventana product family:
- make gwventana_config
+For NAND FLASH based boards:
+ make gwventana_nand_config
make
+For EMMC FLASH based boards:
+ make gwventana_emmc_config
+ make
+
3. Boot source:
---------------
@@ -99,11 +104,11 @@
More details about the i.MX6 BOOT ROM can be found in the IMX6 reference manual.
-3.1. boot from micro-SD
------------------------
+3.1. boot from MMC (eMMC/microSD)
+---------------------------------
When the IMX6 eFUSE settings have been factory programmed to boot from
-micro-SD the SPL will be loaded from offset 0x400 (1KB). Once the SPL is
+MMC the SPL will be loaded from offset 0x400 (1KB). Once the SPL is
booted, it will load and execute U-Boot (u-boot.img) from offset 69KB
on the micro-SD (defined by CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR).
@@ -111,11 +116,11 @@
U-Boot from a file on a FAT/EXT filesystem on the micro-SD, we chose to
use raw micro-SD access to keep the code-size and boot time of the SPL down.
-For these reasons a micro-SD that will be used as an IMX6 primary boot
+For these reasons an MMC device that will be used as an IMX6 primary boot
device must be carefully partitioned and prepared.
The following shell commands are executed on a Linux host (adjust DEV to the
-block storage device of your micro-SD):
+block storage device of your MMC, ie /dev/mmcblk0):
DEV=/dev/sdc
# zero out 1MB of device