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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
-------------------------------------------------------
@ -186,4 +160,4 @@ cat SPL csf-SPL.bin > SPL-signed
cat u-boot-ivt.img csf-u-boot.bin > u-boot-signed.img
These two signed binaries can be used on an i.MX6 in closed
configuration when the according SRK Table Hash has been flashed.
configuration when the according SRK Table Hash has been flashed.