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litesom:customization [2017/02/05 17:37]
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litesom:customization [2017/02/05 17:58]
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| </code> | </code> |
| |
| <accordion> | ====== More details about this customization ====== |
| <panel title="More details about this customization"> | |
| |
| ===== Buildroot configuration ===== | ===== Buildroot configuration ===== |
| ===== Device tree ===== | ===== Device tree ===== |
| |
| | <code> |
| <pre> | |
| . | . |
| ├── board | ├── board |
| │ ├── imx6ul-liteboard-lcd-res.dts | │ ├── imx6ul-liteboard-lcd-res.dts |
| │ ├── post-build.sh | │ ├── post-build.sh |
| </pre> | </code> |
| |
| Buildroot configuration for ''liteboard'' doesn't contain any configuration for LCD nor touchscreen therefore this demo will use customized device tree file ([https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/imx6ul-liteboard-lcd-res.dts imx6ul-liteboard-lcd-res.dts]). | [[https://buildroot.org|Buildroot]] configuration for ''liteboard'' doesn't contain any configuration for //LCD panel// nor //touchscreen// therefore this demo is using customized device tree file ([[https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/imx6ul-liteboard-lcd-res.dts|imx6ul-liteboard-lcd-res.dts]]). |
| |
| During kernel compilation this file will be compiled and output will be stored as <code>imx6ul-liteboard-lcd-res.dtb</code>. You can find this file inside <code>output/images</code> directory. | During kernel compilation this file will be compiled and output will be stored as ''imx6ul-liteboard-lcd-res.dtb''. You can find this file inside ''output/images'' directory. |
| |
| Unfortunately on the target during boot procedure U-Boot will try to load <code>imx6ul-liteboard.dtb</code> file which will be not available on uSD card. Therefore every build Buildroot via <code>post-build.sh</code> script will adjust name of the ''Device Tree Blob'' file to the expected by the U-Boot. | Unfortunately on the target during boot procedure [[http://www.denx.de/wiki/U-Boot|U-Boot]] will try to load ''imx6ul-liteboard.dtb'' file which will be not available on //SD card//. Therefore every build [[https://buildroot.org|Buildroot]] via [[https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/post-build.sh|post-build.sh]] script will adjust name of the ''Device Tree Blob'' file to the expected by the [[http://www.denx.de/wiki/U-Boot|U-Boot]]. |
| |
| == Kernel configuration == | ===== Kernel configuration ===== |
| |
| <pre> | <code> |
| . | . |
| ├── board | ├── board |
| │ └── liteboard-lcd-res | │ └── liteboard-lcd-res |
| │ ├── linux.defconfig | │ ├── linux.defconfig |
| </pre> | </code> |
| |
| Customized Linux configuration is stored in <code>linux.defconfig</code> file. It will be used by the Buildroot to initialize proper kernel configuration. | Customized [[https://kernel.org|Linux]] configuration is stored in [[https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/linux.defconfig|linux.defconfig]] file. It will be used by the [[https://buildroot.org|Buildroot]] to initialize proper kernel configuration. |
| |
| == Extra files == | ===== Extra files ===== |
| |
| <pre> | <code> |
| . | . |
| ├── board | ├── board |
| │ └── rules.d | │ └── rules.d |
| │ └── 60-touchscreen.rules | │ └── 60-touchscreen.rules |
| </pre> | </code> |
| |
| To simplify/unify board setup two config files should be available on running liteboard: | To simplify/unify board setup two config files should be available on running liteboard: |
| |
| * [https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/rootfs/etc/profile.d/tslib.sh /etc/profile.d/tslib.h] - to configure device for [https://github.com/kergoth/tslib tslib] library, | * [[https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/rootfs/etc/profile.d/tslib.sh|/etc/profile.d/tslib.h]] - to configure device for [[https://github.com/kergoth/tslib|tslib]] library, |
| * [https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/rootfs/etc/udev/rules.d/60-touchscreen.rules /etc/rules.d/60-touchscreen.rules] - to guarantee permanent name for the touchscreen device. | * [[https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/rootfs/etc/udev/rules.d/60-touchscreen.rules|/etc/rules.d/60-touchscreen.rules]] - to guarantee permanent name for the touchscreen device. |
| | |
| Each time when <code>make all</code> command will be called Buildroot will automatically copy <code>rootfs</code> directory content to the target <code>root</code> directory used in the next step to generate image for the liteboard.More details about this customization | |
| | |
| == Buildroot configuration == | |
| | |
| <pre> | |
| . | |
| ├── configs | |
| │ └── grinn_liteboard_lcd_res_defconfig | |
| </pre> | |
| | |
| Complete configuration for buildroot is available in <code>configs/grinn_liteboard_lcd_res_defconfig</code> file. | |
| Each time when <code>make grinn_liteboard_lcd_res_defconfig</code> is called Buildroot is configured as defined within this file. | |
| | |
| == Device tree == | |
| | |
| <pre> | |
| . | |
| ├── board | |
| │ └── grinn | |
| │ └── liteboard-lcd-res | |
| │ ├── imx6ul-liteboard-lcd-res.dts | |
| │ ├── post-build.sh | |
| </pre> | |
| | |
| Buildroot configuration for ''liteboard'' doesn't contain any configuration for LCD nor touchscreen therefore this demo will use customized device tree file ([https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/imx6ul-liteboard-lcd-res.dts imx6ul-liteboard-lcd-res.dts]). | |
| | |
| During kernel compilation this file will be compiled and output will be stored as <code>imx6ul-liteboard-lcd-res.dtb</code>. You can find this file inside <code>output/images</code> directory. | |
| | |
| Unfortunately on the target during boot procedure U-Boot will try to load <code>imx6ul-liteboard.dtb</code> file which will be not available on uSD card. Therefore every build Buildroot via <code>post-build.sh</code> script will adjust name of the ''Device Tree Blob'' file to the expected by the U-Boot. | |
| | |
| == Kernel configuration == | |
| | |
| <pre> | |
| . | |
| ├── board | |
| │ └── grinn | |
| │ └── liteboard-lcd-res | |
| │ ├── linux.defconfig | |
| </pre> | |
| | |
| Customized Linux configuration is stored in <code>linux.defconfig</code> file. It will be used by the Buildroot to initialize proper kernel configuration. | |
| | |
| == Extra files == | |
| | |
| <pre> | |
| . | |
| ├── board | |
| │ └── grinn | |
| │ └── liteboard-lcd-res | |
| │ └── rootfs | |
| │ └── etc | |
| │ ├── profile.d | |
| │ │ └── tslib.sh | |
| │ └── udev | |
| │ └── rules.d | |
| │ └── 60-touchscreen.rules | |
| </pre> | |
| | |
| To simplify/unify board setup two config files should be available on running liteboard: | |
| | |
| * [https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/rootfs/etc/profile.d/tslib.sh /etc/profile.d/tslib.h] - to configure device for [https://github.com/kergoth/tslib tslib] library, | |
| * [https://github.com/grinn-pub/examples/blob/master/board/grinn/liteboard-lcd-res/rootfs/etc/udev/rules.d/60-touchscreen.rules /etc/rules.d/60-touchscreen.rules] - to guarantee permanent name for the touchscreen device. | |
| | |
| Each time when <code>make all</code> command will be called Buildroot will automatically copy <code>rootfs</code> directory content to the target <code>root</code> directory used in the next step to generate image for the liteboard. | |
| |
| </panel> | Each time when ''make all'' command will be called [[https://buildroot.org|Buildroot]] will automatically copy [[https://github.com/grinn-pub/examples/tree/master/board/grinn/liteboard-lcd-res/rootfs|rootfs]] directory to the ''output/target'' directory used in the next step to generate image for the [[liteSOM:liteboard]]. |
| </accordion> | |