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omap5_uevm: Add CONFIG_SUPPORT_EMMC_BOOT, document usage 

Add a README to the board which lists the commands required to enable
booting from the eMMC boot partitions found on the board.

Signed-off-by: Tom Rini <trini@ti.com>
Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
This commit is contained in:
Tom Rini 2014-02-05 10:24:24 -05:00 committed by Pantelis Antoniou
parent 614b2bf1c9
commit 378ec0f816
2 changed files with 26 additions and 0 deletions
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25
board/ti/omap5_uevm/README Normal file
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@ -0,0 +1,25 @@
Summary
=======
This document covers various features of the 'omap5_uevm' build and some
related uses.
eMMC boot partition use
=======================
It is possible, depending on SYSBOOT configuration to boot from the eMMC
boot partitions using (name depending on documentation referenced)
Alternative Boot operation mode or Boot Sequence Option 1/2. In this
example we load MLO and u-boot.img from the build into DDR and then use
'mmc bootbus' to set the required rate (see TRM) and 'mmc partconfig' to
set boot0 as the boot device.
U-Boot # setenv autoload no
U-Boot # usb start
U-Boot # dhcp
U-Boot # mmc dev 1 1
U-Boot # tftp ${loadaddr} omap5uevm/MLO
U-Boot # mmc write ${loadaddr} 0 100
U-Boot # tftp ${loadaddr} omap5uevm/u-boot.img
U-Boot # mmc write ${loadaddr} 300 400
U-Boot # mmc bootbus 1 2 0 2
U-Boot # mmc partconf 1 1 1 0

1
include/configs/omap5_uevm.h
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@ -37,6 +37,7 @@
#define CONFIG_PARTITION_UUIDS
#define CONFIG_CMD_PART
#define CONFIG_HSMMC2_8BIT
#define CONFIG_SUPPORT_EMMC_BOOT
/* Required support for the TCA642X GPIO we have on the uEVM */
#define CONFIG_TCA642X