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https://github.com/brain-hackers/u-boot-brain
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c413baa95c
Since DRA7xx/AM57xx SR1.1 and SR1.0 has errata to limit the frequency of MMC1 to 96MHz and frequency of MMC2 to 48MHz for AM572x SR1.1, limit the frequency and disable higher speed modes for those revision. Also use the recommended IO delays (those tagged with "rev11") Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> |
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| .. | ||
| evm.c | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| mux_data.h | ||
| 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