Customizing the Linux kernel - Revision history

KrzysztofChojnowski at 10:43, 30 June 2021

2021-06-30T10:43:50Z

← Older revision		Revision as of 10:43, 30 June 2021
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	== Installing new Linux kernel ==		== Installing new Linux kernel ==

	Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them. The device tree files should be ~~named~~ according to the original ones recognized by u-boot:		Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them. If the /boot directory is empty we need to mount the boot partition using the command:

			<pre>
			mount /dev/mmcblk1p1 /boot
			</pre>

			The built device tree files should be renamed according to the original ones recognized by u-boot:

	*visionsom-6ull.dtb - for SD card module		*visionsom-6ull.dtb - for SD card module

KrzysztofChojnowski at 12:43, 21 August 2020

2020-08-21T12:43:15Z

KrzysztofChojnowski at 10:13, 29 June 2020

2020-06-29T10:13:56Z

← Older revision		Revision as of 10:13, 29 June 2020
Line 91:		Line 91:
	== Installing new Linux kernel ==		== Installing new Linux kernel ==

	Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them. The device tree files should be named according to the original ones:		Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them. The device tree files should be named according to the original ones recognized by u-boot:

	*somlabs-visionsom-6ull.dtb - for SD card module		*somlabs-visionsom-6ull.dtb - for SD card module

KrzysztofChojnowski at 10:11, 29 June 2020

2020-06-29T10:11:52Z

← Older revision		Revision as of 10:11, 29 June 2020
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	The new kernel image is located in the ''arch/arm/boot/zImage'' file and the device tree blobs can be found in the ''arch/arm/boot/dts/'' directory. For the VisionCB-STD-6ULL there are four hardware configurations available:		The new kernel image is located in the ''arch/arm/boot/zImage'' file and the device tree blobs can be found in the ''arch/arm/boot/dts/'' directory. For the VisionCB-STD-6ULL there are four hardware configurations available:
	*visioncb-6ull-std-sd.dtb - for SD card module version without wireless modem		*visioncb-6ull-std-sd.dtb - for SD card module version without wireless modem
	*visioncb-6ull-std-~~emmc~~-btwifi.dtb - for SD card module version with wireless modem		*visioncb-6ull-std-sd-btwifi.dtb - for SD card module version with wireless modem
	*visioncb-6ull-std-emmc.dtb - for eMMC card module version ~~with~~ wireless modem		*visioncb-6ull-std-emmc.dtb - for eMMC card module version without wireless modem
	*visioncb-6ull-std-sd-btwifi.dtb - for eMMC card module version ~~without~~ wireless modem		*visioncb-6ull-std-sd-btwifi.dtb - for eMMC card module version with wireless modem

	Finally the modules can be installed using the following command:		Finally the modules can be installed using the following command:

KrzysztofChojnowski at 10:10, 29 June 2020

2020-06-29T10:10:21Z

← Older revision		Revision as of 10:10, 29 June 2020
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	*''dtbs'' - device tree		*''dtbs'' - device tree

	The new kernel image is located in the ''arch/arm/boot/zImage'' file and the device tree blobs can be found in the ''arch/arm/boot/dts/'' directory. For the ~~VisionSOM~~-6ULL there are ~~three~~ hardware configurations available:		The new kernel image is located in the ''arch/arm/boot/zImage'' file and the device tree blobs can be found in the ''arch/arm/boot/dts/'' directory. For the VisionCB-STD-6ULL there are four hardware configurations available:
	*~~somlabs~~-~~visionsom~~-6ull.dtb - for SD card version		*visioncb-6ull-std-sd.dtb - for SD card module version without wireless modem
	*~~somlabs~~-~~visionsom~~-~~6ull~~-emmc.dtb - for eMMC version		*visioncb-6ull-std-emmc-btwifi.dtb - for SD card module version with wireless modem
	*~~somlabs~~-~~visionsom~~-~~6ull~~-~~nand~~.dtb - for ~~NAND~~ version		*visioncb-6ull-std-emmc.dtb - for eMMC card module version with wireless modem
			*visioncb-6ull-std-sd-btwifi.dtb - for eMMC card module version without wireless modem

	Finally the modules can be installed using the following command:		Finally the modules can be installed using the following command:
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	== Installing new Linux kernel ==		== Installing new Linux kernel ==

	Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them.		Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them. The device tree files should be named according to the original ones:

			*somlabs-visionsom-6ull.dtb - for SD card module
			*somlabs-visionsom-6ull-emmc.dtb - for eMMC module

	The kernel modules needs to be copied to the ''/lib/modules'' directory and the headers to ''/usr/include''.		The kernel modules needs to be copied to the ''/lib/modules'' directory and the headers to ''/usr/include''.

KrzysztofChojnowski at 11:13, 22 June 2020

2020-06-22T11:13:25Z

← Older revision		Revision as of 11:13, 22 June 2020
Line 19:		Line 19:
	The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 5.4.3. The sources of the NXP kernel patched by SoMLabs can be downloaded from the Github repositories using ''git'' command:		The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 5.4.3. The sources of the NXP kernel patched by SoMLabs can be downloaded from the Github repositories using ''git'' command:

	<pre>git clone https://github.com/SoMLabs/somlabs~~-debian-6ull~~-linux-imx.git linux-imx</pre>		<pre>git clone https://github.com/SoMLabs/somlabs-linux-imx.git linux-imx</pre>

	The original NXP kernel is available in the repository (branch ''rel_imx_5.4.3_2.0.0''):		The original NXP kernel is available in the repository (branch ''rel_imx_5.4.3_2.0.0''):

KrzysztofChojnowski at 09:53, 2 June 2020

2020-06-02T09:53:19Z

← Older revision		Revision as of 09:53, 2 June 2020
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	== Downloading the Linux kernel ==		== Downloading the Linux kernel ==

	The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 4.~~19.35~~. The sources of the NXP kernel patched by SoMLabs can be downloaded from the Github repositories using ''git'' command:		The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 5.4.3. The sources of the NXP kernel patched by SoMLabs can be downloaded from the Github repositories using ''git'' command:

	<pre>git clone https://github.com/SoMLabs/somlabs-debian-6ull-linux-imx.git linux-imx</pre>		<pre>git clone https://github.com/SoMLabs/somlabs-debian-6ull-linux-imx.git linux-imx</pre>

	The original NXP kernel is available in the repository (branch ''~~imx_4~~.19.~~35_1~~.1.0''):		The original NXP kernel is available in the repository (branch ''rel_imx_5.4.3_2.0.0''):

	<pre>https://source.codeaurora.org/external/imx/linux-imx</pre>		<pre>https://source.codeaurora.org/external/imx/linux-imx</pre>

KrzysztofChojnowski at 12:52, 26 March 2020

2020-03-26T12:52:49Z

← Older revision		Revision as of 12:52, 26 March 2020
Line 17:		Line 17:
	== Downloading the Linux kernel ==		== Downloading the Linux kernel ==

	The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 4.19.35. The sources can be downloaded from the ~~NXP~~ repositories using ''git'':		The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 4.19.35. The sources of the NXP kernel patched by SoMLabs can be downloaded from the Github repositories using ''git'' command:

	<pre>https://~~source~~.~~codeaurora.org~~/~~external~~/imx/linux-imx</pre>		<pre>git clone https://github.com/SoMLabs/somlabs-debian-6ull-linux-imx.git linux-imx</pre>

	~~This command will download the entire~~ kernel ~~source, so we need to switch to~~ the ~~appropriate~~ branch:		The original NXP kernel is available in the repository (branch ''imx_4.19.35_1.1.0''):

	<pre>~~cd linux-imx~~		<pre>https://source.codeaurora.org/external/imx/linux-imx</pre>
	~~git checkout imx_4.19.35_1.1.0</pre>~~

	~~In the SoMLabs Debian versions older than 02-2020 the older Linux kernel version 4.9 is used. It can be obtained from the repository:~~

	~~<pre>git clone git~~://~~git~~.~~freescale~~.~~com~~/~~imx~~/~~linux-~~imx~~.git<~~/~~pre>~~
	~~<pre>cd~~ linux-imx
	~~git checkout rel_imx_4.9.x_1.0.0_ga~~</pre>

	~~== Patching the Linux kernel ==~~

	The base kernel from NXP supports the processor, however we need to apply the patch with VisionSOM-6ULL hardware configuration. The newest patch is located in the SoMLabs git repository and can be cloned using command:

	~~<pre>git clone https://github.com/SoMLabs/linux-imx-somlabs-patch.git</pre>~~

	~~Now is time to apply the patch to the kernel sources by calling the following command from the kernel directory (linux-imx):~~

	~~<pre>git apply <KERNEL_PATCH_PATH>/linux-imx-somlabs.patch</pre>~~

	~~The Linux kernel version 4.9 in the SoMLabs Debian versions older the 02-2020 can be patched using the ''kernel_4.9'' tag of the mentioned repository.~~

	== Customizing the Linux kernel ==		== Customizing the Linux kernel ==

KrzysztofChojnowski at 17:55, 9 March 2020

2020-03-09T17:55:54Z

← Older revision		Revision as of 17:55, 9 March 2020
Line 42:		Line 42:
	<pre>git apply <KERNEL_PATCH_PATH>/linux-imx-somlabs.patch</pre>		<pre>git apply <KERNEL_PATCH_PATH>/linux-imx-somlabs.patch</pre>

	The Linux kernel version 4.19 can be patched using the '''kernel_4.9''' tag of the mentioned repository.		The Linux kernel version 4.9 in the SoMLabs Debian versions older the 02-2020 can be patched using the ''kernel_4.9'' tag of the mentioned repository.

	== Customizing the Linux kernel ==		== Customizing the Linux kernel ==

KrzysztofChojnowski at 17:55, 9 March 2020

2020-03-09T17:55:04Z

← Older revision		Revision as of 17:55, 9 March 2020
Line 41:		Line 41:

	<pre>git apply <KERNEL_PATCH_PATH>/linux-imx-somlabs.patch</pre>		<pre>git apply <KERNEL_PATCH_PATH>/linux-imx-somlabs.patch</pre>

			The Linux kernel version 4.19 can be patched using the '''kernel_4.9''' tag of the mentioned repository.

	== Customizing the Linux kernel ==		== Customizing the Linux kernel ==

← Older revision		Revision as of 12:43, 21 August 2020
Line 17:		Line 17:
	== Downloading the Linux kernel ==		== Downloading the Linux kernel ==

	The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 5.4.3. The sources of the NXP kernel patched by SoMLabs can be downloaded from the Github repositories using ''git'' command:		The iMX6ULL processor is fully supported by the Linux kernel version maintained by the NXP company. We will use the kernel released under version 5.4.24. The sources of the NXP kernel patched by SoMLabs can be downloaded from the Github repositories using ''git'' command:

	<pre>git clone https://github.com/SoMLabs/somlabs-linux-imx.git linux-imx</pre>		<pre>git clone https://github.com/SoMLabs/somlabs-linux-imx.git linux-imx</pre>

	The original NXP kernel is available in the repository (branch ''~~rel_imx_5~~.4.~~3_2~~.0.0''):		The original NXP kernel is available in the repository (branch ''imx_5.4.24_2.1.0''):

	<pre>https://source.codeaurora.org/external/imx/linux-imx</pre>		<pre>https://source.codeaurora.org/external/imx/linux-imx</pre>
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	Now we can create the default configuration from the SoMLabs kernel patch:		Now we can create the default configuration from the SoMLabs kernel patch:
	<pre>make ~~somlabs-visionsom_defconfig~~</pre>		<pre>make visionsom_6ull_defconfig</pre>

	This configuration may be used as a base for further customization. Alternatively one of the configuration files provided by NXP may also be used - they can be found in the arch/arm/configs/ directory.		This configuration may be used as a base for further customization. Alternatively one of the configuration files provided by NXP may also be used - they can be found in the arch/arm/configs/ directory.
Line 93:		Line 93:
	Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them. The device tree files should be named according to the original ones recognized by u-boot:		Now, when we have all kernel components we can install the to our VisionSOM system. The original kernel (''zImage'') and the device tree files (''*.dtb'') are located in the ''/boot'' directory on SD card or eMMC memory, so we can just backup the old versions and replace them. The device tree files should be named according to the original ones recognized by u-boot:

	*~~somlabs-~~visionsom-6ull.dtb - for SD card module		*visionsom-6ull.dtb - for SD card module
	*~~somlabs-~~visionsom-6ull-emmc.dtb - for eMMC module		*visionsom-6ull-emmc.dtb - for eMMC module

	The kernel modules needs to be copied to the ''/lib/modules'' directory and the headers to ''/usr/include''.		The kernel modules needs to be copied to the ''/lib/modules'' directory and the headers to ''/usr/include''.