Unable to change BOOT (FAT) partition size when building an sdcard image with Yocto

[gabriele74]

When building an image to be copied to sdcard via dd, the default boot partition (fat32) size

is 8Mb, as found in meta-fsl-arm/classes/image_types_fsl.bbclass:

BOOT_SPACE ?= "8192"

I'm trying to override this value to get a much bigger boot partition, like 132Mb

(this is needed because I need to create an one-time sdcard used for testing/factory programming

and I want to store a rootfs image to be programmed in that partition)

In my image recipe I've overridden BOOT_SPACE value but with no effect, i.e. in the resulting

image the fat32 partition is always 8Mb.

I can't understand this behavior because in the same recipe I override also IMAGE_ROOTFS_SIZE and

this value is taken into account and the resulting ROOTFS size is what I set!

This is my image recipe:

DESCRIPTION = "XY factory image"

IMAGE_INSTALL = "packagegroup-core-boot ${ROOTFS_PKGMANAGE_BOOTSTRAP} ${CORE_IMAGE_EXTRA_INSTALL}"

IMAGE_LINGUAS = " "

LICENSE = "MIT"

inherit core-image

IMAGE_INSTALL += "mtd-utils"

IMAGE_FEATURES += " ssh-server-dropbear"

# Correctly used!

IMAGE_ROOTFS_SIZE = "16384"

#Not taken into account. Why ?

BOOT_SPACE = "131072"

Any help greatly appreciated :-)

[gabriele74 · Accepted solution]

I reply to my own question with the solution :smileyhappy:

For the variable BOOT_SPACE to be taken into account, it must be placed

in the machine configuration file, i.e.:

/sources/meta-XY/conf/machine.conf

and not into an image recipe.

Tested and confirmed with Yocto 1.5

[gusarambula]

Thank you for posting the answer to your question! I'm sure it's going to help other community users!

[saurabh206]

Hi,

You can use the MFG tool for Yocto binary update.

In this you can change the partition size.

Thanks

Saurabh