mirror of
https://github.com/AsahiLinux/u-boot
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0a888f584c
we currently use in-development IODelay values for DRA72x which are proposed in the data sheet, however, DRA72x EVM uses DP83865 ethernet Phy over RGMII. The PHY characteristics and routing choices made on the EVM, make the current iodelay values fail ethernet communication. Instead, we need to choose custom values for DRA72x-evm specifically designed for the PHY and routing on the platform for ethernet to function. Cc: Nishanth Menon <nm@ti.com> Cc: Lokesh Vutla <lokeshvutla@ti.com> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by: Nishanth Menon <nm@ti.com> Signed-off-by: Mugunthan V N <mugunthanvnm@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