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extra-build-config.md: Improve documentation on generating initramfs image

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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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Khem Raj
2018-11-07 18:52:33 -08:00
committed by Andrei Gherzan
parent f661406e2d
commit 78259ad6e2
1 changed files with 4 additions and 3 deletions
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7
docs/extra-build-config.md
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@@ -158,13 +158,14 @@ command (eg. bootz) to be used.
To build an initramfs image:
* Set this 3 kernel variables (in linux-raspberrypi.inc for example)
* Set this 3 kernel variables (in kernel's do_configure_prepend in linux-raspberrypi.inc after the line kernel_configure_variable LOCALVERSION "\"\""
)
- kernel_configure_variable BLK_DEV_INITRD y
- kernel_configure_variable INITRAMFS_SOURCE ""
- kernel_configure_variable RD_GZIP y
* Set the yocto variables (in linux-raspberrypi.inc for example)
- `INITRAMFS_IMAGE = "<a name for your initramfs image>"`
* Set the yocto variables (e.g. in local.conf)
- `INITRAMFS_IMAGE = "<name for your initramfs image>"`
- `INITRAMFS_IMAGE_BUNDLE = "1"`
## Enable SPI bus