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Some machines provide several possible configurations and until now
there was no easy way for user to override the default setting.
This class provides a system similar to PACKAGECONFIG but for
U-Boot. The format is:
UBOOT_CONFIG ??= <default>
UBOOT_CONFIG[foo] = "config,images"
There are two possible parameters:
- config: it is used to set UBOOT_MACHINE
- images: it is used to append onto IMAGE_FSTYPES
Below there's an usage example:
,----[ i.MX6Q SABRE AUTO based example ]
| UBOOT_CONFIG ??= "sd"
| UBOOT_CONFIG[sd] = "mx6qsabreauto_config,sdcard"
| UBOOT_CONFIG[eimnor] = "mx6qsabreauto_eimnor_config"
| UBOOT_CONFIG[nand] = "mx6qsabreauto_nand_config,ubifs"
| UBOOT_CONFIG[spinor] = "mx6qsabreauto_spinor_config"
`----
User can, from local.conf or environment, use UBOOT_CONFIG=nand and
override the default setting, as:
,----[ Override example from command line ]
| MACHINE=imx6qsabreauto UBOOT_CONFIG=nand bitbake core-image-base
`----
(From OE-Core rev: 5dba521611d644357cf0a98d2e30dcf41777c6ef)
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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