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4b421d4ea1
u-boot-brain/board/solidrun/mx6cuboxi
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Fabio Estevam 4b421d4ea1 mx6cuboxi: Fix the reset delay for the AR8035 PHY 
Since commit 59370f3fcd ("net: phy: delay only if reset handler is
registered") Ethernet is no longer functional:

Booting from net ...
FEC Waiting for PHY auto negotiation to complete......... TIMEOUT !
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4

This commit does not have an issue in itself, but it revelead a problem
with the Ethernet initialization.

As per the AR8035 datasheet:

"For a reliable power on reset, suggest to keep asserting the reset
low long enough (10ms) to ensure the clock is stable and clock-to-reset
1ms requirement is satisfied."

So do as suggested and keep the reset low for 10ms.

Also add a 100us delay after deasserting the reset line
to guarantee that the PHY ID can be read correctly and the Atheros
PHY can be loaded as per Troy Kisky's suggestion.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Tested-by: Tom Rini <trini@konsulko.com>
2016-01-10 10:50:24 +01:00
..
Kconfig mx6: remove SYS_SOC from board Kconfig 2015-09-13 10:37:29 +02:00
MAINTAINERS mx6cuboxi: Fix the defconfig name 2015-04-27 13:13:57 +02:00
Makefile mx6: Add initial SPL support for HummingBoard-i2eX 2015-04-22 14:39:06 +02:00
mx6cuboxi.c mx6cuboxi: Fix the reset delay for the AR8035 PHY 2016-01-10 10:50:24 +01:00
README mx6cuboxi: Mention Cubox-i in the README 2015-05-15 19:21:23 +02:00

README 

How to use U-boot on Solid-run mx6 Hummingboard and Cubox-i
-----------------------------------------------------------

- Build U-boot for Hummingboard/Cubox-i:

$ make mrproper
$ make mx6cuboxi_defconfig
$ make

This will generate the SPL image called SPL and the u-boot.img.

- Flash the SPL image into the SD card:

sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync

- Flash the u-boot.img image into the SD card:

sudo dd if=u-boot.img of=/dev/mmcblk0 bs=1k seek=69; sync

- Insert the SD card in the board, power it up and U-boot messages should
come up.