The boot script appends values to certain variables such as
$extra_bootargs and $overlays.
If the final instruction of the boot script (dboot command)
fails, these variables contain the new values, plus the original
one. Since the user recovers the prompt, he may do a 'saveenv'
to save the environment, and the modified variables will be
saved, only to be enlarged again on the next boot.
This can lead to repeated strings on such variables.
Save the original value and restore it in case of failure on
the dboot command.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>
Follow the syntax:
_ov_<som|board>_<functionality>[_<hardware>].dts
where:
_ov_ identifies the file as an overlay.
som|board identifies whether the overlay applies to the SOM
or to the carrier board.
functionality identifies the function of the overlay.
hardware identifies the hardware to which the overlay
applies.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>
With the previous solution we would need to generate
multiple overlays for each soc_type, so if we have a
new soc type (for example the solo), we would need
to generate 3 different overlays.
Signed-off-by: Francisco Gil Martinez <francisco.gilmartinez@digi.com>
With the device tree overlays mechanism in place, the bootscript
doesn't need to set the fdt_file variable. Instead, it will use
the value it has (which can be changed by the user) and it will
simply update the 'overlays' variable with the device tree
overlays that apply basing on the hardware capabilities found
on the HWID, SOM version, and carrier board version.
This allows a user to override the default fdt_file to point
to his custom device tree, but still make use of the boot script
for hardware-detected overlays.
Without the need to set the base filename, the boot script is the
same for any carrier board of the ccimx8x SOM, so this commit
moves it to a common folder.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>
Parse the hardware version from the HWID and load the overlay if and only if
the revision is "1". Also, update the board's device tree list accordingly.
https://jira.digi.com/browse/DEL-7070
Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>
Instead of having two separate device trees for the non-wireless and wireless
variants of the ccimx8mn, use the non-wireless .dtb as a base and apply the
overlays in the bootscript depending on the variant's capabilities.
Also, update the board's device tree list accordingly.
https://jira.digi.com/browse/DEL-2609
Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>
Hector Palacios
Francisco Gil Martinez
Arturo Buzarra
Gabriel Valcazar