[U-Boot] [PATCH v2 2/8] omap5_uevm: Add CONFIG_SUPPORT_EMMC_BOOT, document usage

Tom Rini
2014-01-30T21:31:54Z

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>
---
board/ti/omap5_uevm/README | 25 +++++++++++++++++++++++++
include/configs/omap5_uevm.h | 1 +
2 files changed, 26 insertions(+)
create mode 100644 board/ti/omap5_uevm/README

diff --git a/board/ti/omap5_uevm/README b/board/ti/omap5_uevm/README
new file mode 100644
index 0000000..970e2ec
--- /dev/null
+++ b/board/ti/omap5_uevm/README
@@ -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
diff --git a/include/configs/omap5_uevm.h b/include/configs/omap5_uevm.h
index 76c5106..3df502e 100644
--- a/include/configs/omap5_uevm.h
+++ b/include/configs/omap5_uevm.h
@@ -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
--
1.7.9.5