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Tom Rini 33ace362fd mmc: Add 'mmc rst-function' sub-command 
Some eMMC chips may need the RST_n_FUNCTION bit set to a non-zero value
in order for warm reset of the system to work.  Details on this being
required will be part of the eMMC datasheet.  Also add using this
command to the dra7xx README.

* Whitespace fix by panto

Signed-off-by: Tom Rini <trini@ti.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
2014-04-02 13:02:58 +03:00
..
evm.c ARM: DRA7xx: add support for reading cpsw 2nd mac from efuse 2014-03-04 09:42:07 -05:00
Makefile board: ti: convert makefiles to Kbuild style 2013-10-31 13:26:44 -04:00
mux_data.h usb: dra7xx: Add support for dra7xx xhci USB host 2013-10-20 23:42:41 +02:00
README mmc: Add 'mmc rst-function' sub-command 2014-04-02 13:02:58 +03:00

README 

Summary
=======

This document covers various features of the 'dra7xx_evm' 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} dra7xx/MLO
U-Boot # mmc write ${loadaddr} 0 100
U-Boot # tftp ${loadaddr} dra7xx/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
U-Boot # mmc rst-function 1 1