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README.imx6: Prefer loading SPL via the new SDP mechanism

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Now that it is possible to load SPL and u-boot.img via imx_usb_loader
tool, mention this method instead of the old one that relied on ymodem.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
This commit is contained in:
Fabio Estevam 2017-09-20 11:21:49 -03:00 committed by Stefano Babic
parent 560a8af2f4
commit 626365b4f7
1 changed files with 3 additions and 29 deletions
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doc/README.imx6
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@ -110,34 +110,8 @@ issue the command:
sudo ../imx_usb_loader/imx_usb -v u-boot.imx
Getting U-Boot when SPL support is active, it requires
two downloads. imx_usb_loader downloads the SPL into
OCRAM and starts it. SPL will check for a valid u-boot.img, and
because it is not found, it will wait for it using the y-modem
protocol via the console.
A first install is then possible by combining imx_usb_loader with
another tool such as kermit.
sudo ../imx_usb_loader/imx_usb -v SPL
kermit kermit_uboot
and kermit_uboot contains something like this (set line should be adjusted):
set line /dev/ttyUSB1
set speed 115200
SET CARRIER-WATCH OFF
set flow-control none
set handshake none
set prefixing all
set file type bin
set protocol ymodem
send u-boot.img
c
The last "c" command tells kermit (from ckermit package in most distros)
to switch from command line mode to communication mode, and when the
script is finished, the U-Boot prompt is shown in the same shell.
In order to load SPL and u-boot.img via imx_usb_loader tool,
please refer to doc/README.sdp.
3. Using Secure Boot on i.MX6 machines with SPL support
-------------------------------------------------------