VAR-SOM-MX6 Ubuntu Customize linux-variscite
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VAR-SOM-MX6 - Customize linux-variscite
Note:
Under Construction
Under Construction
Introduction
We deliver a complete Linux in source code adopted to our development platforms. Our customers may require additional changes. You can change and adopt the Linux kernel and/or the device tree's to your requirements.
Linux out of tree and NFS
Please start with:
Linux Changes
Make your kernel changes and test them. Most of the changes will be in Linux kernel configuration. For example:
Add a printer gadget $ make -j6 ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- menuconfig
Changes made:
diff .config arch/arm/configs/imx_v7_var_defconfig 3359c3359 < CONFIG_USB_G_PRINTER=m --- > # CONFIG_USB_G_PRINTER is not set
Create a new config file
$ cp .config arch/arm/configs/imx_v7_var_custom_defconfig $ git status On branch imx_3.14.38_6qp_ga_var01 Untracked files: (use "git add <file>..." to include in what will be committed) arch/arm/configs/imx_v7_var_custom_defconfig nothing added to commit but untracked files present (use "git add" to track) $ git add arch/arm/configs/imx_v7_var_custom_defconfig $ git commit -a -m "Custom" $ git format-patch e07c324139f484b2050da7cf47ec8951b23e2679..550359cea510133050e904c8b8191587d173abc9
Copy patch file to Yocto
$ mkdir ~/var-som-mx6-yocto-fido/sources/meta-variscite-mx6/recipes-kernel/linux/linux-variscite $ cp 0001-Custom.patch ~/var-som-mx6-yocto-fido/sources/meta-variscite-mx6/recipes-kernel/linux/linux-variscite/0001-custom.patch
Yocto changes
Patch in meta-variscite linux-variscite_3.14.38.bb:
diff --git a/recipes-kernel/linux/linux-variscite_3.14.38.bb b/recipes-kernel/linux/linux-variscite_3.14.38.bb
index f58a8fd..70ddb59 100755
--- a/recipes-kernel/linux/linux-variscite_3.14.38.bb
+++ b/recipes-kernel/linux/linux-variscite_3.14.38.bb
@@ -17,10 +17,12 @@ SRCBRANCH = "imx_3.14.38_6qp_ga_var01"
LOCALVERSION = "-6QP"
SRCREV = "5b280915311efd196a81a8792e7f952172f6373c"
KERNEL_SRC ?= "git://github.com/varigit/linux-2.6-imx.git;protocol=git"
-SRC_URI = "${KERNEL_SRC};branch=${SRCBRANCH}"
+SRC_URI = "${KERNEL_SRC};branch=${SRCBRANCH} \
+ file://0001-custom.patch \
+ "
#LOCALVERSION = "-1.1.0"
-FSL_KERNEL_DEFCONFIG = "imx_v7_var_defconfig"
+FSL_KERNEL_DEFCONFIG = "imx_v7_var_custom_defconfig"
KERNEL_IMAGETYPE = "uImage"
@@ -28,14 +30,14 @@ KERNEL_EXTRA_ARGS += "LOADADDR=${UBOOT_ENTRYPOINT}"
do_configure_prepend() {
# copy latest defconfig for imx_v7_var_defoonfig to use
- cp ${S}/arch/arm/configs/imx_v7_var_defconfig ${B}/.config
- cp ${S}/arch/arm/configs/imx_v7_var_defconfig ${B}/../defconfig
+ cp ${S}/arch/arm/configs/${FSL_KERNEL_DEFCONFIG} ${B}/.config
+ cp ${S}/arch/arm/configs/${FSL_KERNEL_DEFCONFIG} ${B}/../defconfig
}
# Copy the config file required by ti-compat-wirless-wl18xx
do_deploy_append () {
- cp ${S}/arch/arm/configs/imx_v7_var_defconfig ${S}/.config
+ cp ${S}/arch/arm/configs/${FSL_KERNEL_DEFCONFIG} ${S}/.config
}
Build and run the system
On target:
root@var-som-mx6:~# find /lib/modules/ -name *.ko | grep print /lib/modules/3.14.38-6QP+g5b28091/kernel/drivers/usb/gadget/g_printer.ko