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fitimage.bbclass: add command line property

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Since version 0.9 of the fit image specification, it is possible to
embed the command line in the fit image.
Add the option to embed a command line argument for the next boot stage
in the fit image.

Link: https://github.com/open-source-firmware/flat-image-tree/releases/tag/v0.9

Signed-off-by: Thomas Bonnefille <thomas.bonnefille@bootlin.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
This commit is contained in:
Thomas Bonnefille
2026-08-29 10:41:46 -07:00
committed by Khem Raj
parent 480b369ae5
commit 1a71a3e63f
1 changed files with 11 additions and 0 deletions
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meta-oe/classes/fitimage.bbclass
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@@ -36,6 +36,10 @@
# FITIMAGE_IMAGE_bootscript[type] ?= "bootscript"
# FITIMAGE_IMAGE_bootscript[file] ?= "boot.scr"
#
# Add a kernel command line as an optional property of the configuration
# node
# FITIMAGE_CMDLINE ?= "root=/dev/mydisk"
#
# Valid options for the [type] varflag are: "kernel", "fdt", "fdto", "fdtapply", "ramdisk", "bootscript".
#
# To enable signing, set
@@ -85,6 +89,8 @@ FITIMAGE_ENCRYPT_ALGO ?= "rsa2048"
FITIMAGE_ENCRYPT_ALGO[doc] = "Signature algorithm to use"
FITIMAGE_CONFIG_PREFIX ?= "conf-"
FITIMAGE_CONFIG_PREFIX[doc] = "Prefix to use for FIT configuration node name"
FITIMAGE_CMDLINE ?= ""
FITIMAGE_CMDLINE[doc] = "Kernel command line to embed in the FIT configuration node"
FITIMAGE_LOADADDRESS ??= ""
FITIMAGE_ENTRYPOINT ??= ""
@@ -286,6 +292,7 @@ def fitimage_emit_subsection_signature(d, fd, sign_images_list):
#
def fitimage_emit_section_config(d, fd, dtb, kernelcount, ramdiskcount, setupcount, bootscriptid, compatible, dtbcount):
sign = d.getVar("FITIMAGE_SIGN")
cmdline = d.getVar("FITIMAGE_CMDLINE")
conf_default = None
conf_prefix = d.getVar('FITIMAGE_CONFIG_PREFIX') or ""
@@ -300,6 +307,8 @@ def fitimage_emit_section_config(d, fd, dtb, kernelcount, ramdiskcount, setupcou
conf_desc += ", setup"
if bootscriptid:
conf_desc += ", u-boot script"
if cmdline:
conf_desc += ", command line"
if dtbcount == 1:
conf_default = d.getVar('FITIMAGE_DEFAULT_CONFIG') or f'{conf_prefix}{dtb}'
@@ -314,6 +323,8 @@ def fitimage_emit_section_config(d, fd, dtb, kernelcount, ramdiskcount, setupcou
fd.write(f'\t\t\tramdisk = "ramdisk-{ramdiskcount}";\n')
if bootscriptid:
fd.write(f'\t\t\tbootscr = "bootscr-{bootscriptid}";\n')
if cmdline:
fd.write(f'\t\t\tcmdline = "{cmdline}";\n')
if compatible:
fd.write(f'\t\t\tcompatible = "{compatible}";\n')