[OE-core] [RFC PATCH] uboot-config.bbclass: Allow choose of U-Boot config for machine
Otavio Salvador
otavio at ossystems.com.br
Sun Aug 4 22:25:16 UTC 2013
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
`----
Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
---
meta/classes/uboot-config.bbclass | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100644 meta/classes/uboot-config.bbclass
diff --git a/meta/classes/uboot-config.bbclass b/meta/classes/uboot-config.bbclass
new file mode 100644
index 0000000..fc37620
--- /dev/null
+++ b/meta/classes/uboot-config.bbclass
@@ -0,0 +1,39 @@
+# Allow easy override of U-Boot config for a machine
+#
+# The format to specify it, in the machine, is:
+#
+# UBOOT_CONFIG ??= <default>
+# UBOOT_CONFIG[foo] = "config,images"
+#
+# Copyright 2013 (C) O.S. Systems Software LTDA.
+
+addhandler uboot_config_eventhandler
+uboot_config_eventhandler[eventmask] = "bb.event.ConfigParsed"
+python uboot_config_eventhandler() {
+ ubootconfigflags = e.data.getVarFlags('UBOOT_CONFIG')
+ if not ubootconfigflags:
+ return
+
+ ubootconfig = (e.data.getVar('UBOOT_CONFIG', True) or "").split()
+ if len(ubootconfig) > 1:
+ raise bb.parse.SkipPackage('You can only have a single default for UBOOT_CONFIG.')
+ elif len(ubootconfig) == 0:
+ raise bb.parse.SkipPackage('You must set a default in UBOOT_CONFIG.')
+ ubootconfig = ubootconfig[0]
+
+ for f, v in ubootconfigflags.items():
+ if f == 'defaultval':
+ continue
+
+ items = v.split(',')
+ if items[0] and len(items) > 2:
+ raise bb.parse.SkipPackage('Only config,images can be specified!')
+
+ if ubootconfig == f:
+ bb.debug(1, "Setting UBOOT_MACHINE to %s." % items[0])
+ e.data.setVar('UBOOT_MACHINE', items[0])
+
+ if items[1]:
+ bb.debug(1, "Appending '%s' to IMAGE_FSTYPES." % items[1])
+ e.data.appendVar('IMAGE_FSTYPES', ' ' + items[1])
+}
--
1.8.3.2
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