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products:sbc:common:configurations:device-tree-overlay
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products:sbc:common:configurations:device-tree-overlay [2022/09/22 02:40] hyphop |
products:sbc:common:configurations:device-tree-overlay [2023/06/05 04:02] nick [VIM4] |
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| ====== Device Tree Overlay ====== | ====== Device Tree Overlay ====== | ||
| - | We can use DT overlays to enable or disable the peripherals without recompiling the kernel source code. | + | We can use DT overlays to enable/ |
| - | ===== Device reference table ====== | + | ===== DT collections |
| - | ^ | + | https://github.com/khadas/khadas-linux-kernel-dt-overlays |
| - | ^ VIM1 | + | |
| - | ^ VIM2 | + | |
| - | ^ VIM3 | + | |
| - | ^ VIM3L | / | + | |
| - | ^ VIM1S | / | + | |
| - | ^ VIM4 | + | |
| - | ^ Edge2 | / | + | |
| - | ^ Edge1 | / | + | |
| - | | ::: | + | |
| - | ===== Device | + | ===== Device |
| + | |||
| + | ^ ^ DT overlays folder | ||
| + | ^ VIM1 | / | ||
| + | ^ VIM2 | / | ||
| + | ^ VIM3 | / | ||
| + | ^ VIM3L | ||
| + | ^ VIM1S | ||
| + | ^ VIM4 | / | ||
| + | ^ New VIM4 | / | ||
| + | ^ Edge2 | ||
| + | ^ Edge1 | ||
| + | | ::: | / | ||
| + | |||
| + | ===== Device Configurations | ||
| <tabbox VIM1/ | <tabbox VIM1/ | ||
| Line 23: | Line 28: | ||
| <WRAP important > | <WRAP important > | ||
| - | **BOARD** should be '' | + | **BOARD** should be '' |
| </ | </ | ||
| Line 31: | Line 36: | ||
| ```shell | ```shell | ||
| - | khadas@Khadas: | + | khadas@Khadas: |
| disable-ts050.dtbo | disable-ts050.dtbo | ||
| i2c3.dtbo | i2c3.dtbo | ||
| Line 42: | Line 47: | ||
| ``` | ``` | ||
| - | DT-overlays configuration file: ''/ | + | DT-overlays configuration file: |
| - | ```txt | + | ```txt /boot/env.txt |
| # Device Tree Overlays | # Device Tree Overlays | ||
| # | # | ||
| Line 64: | Line 69: | ||
| <tabbox VIM4> | <tabbox VIM4> | ||
| - | DT-overlays '' | + | DT-overlays '' |
| ```shell | ```shell | ||
| Line 82: | Line 87: | ||
| ```shell | ```shell | ||
| - | khadas@Khadas: | + | khadas@Khadas: |
| - | total 28 | + | i2cm_b.dtbo |
| - | -rw-rw-r-- 1 root root 223 Aug 12 10:59 i2cm_b.dtbo | + | i2cm_e.dtbo |
| - | -rw-rw-r-- 1 root root 223 Aug 12 10:59 i2cm_e.dtbo | + | pwm_f.dtbo |
| - | -rw-rw-r-- 1 root root 345 Aug 12 10:59 pwm_f.dtbo | + | uart_c.dtbo |
| - | -rw-rw-r-- 1 root root 225 Aug 12 10:59 uart_c.dtbo | + | |
| ``` | ``` | ||
| - | |||
| DT-overlays configuration file is ''/ | DT-overlays configuration file is ''/ | ||
| <tabbox Edge2> | <tabbox Edge2> | ||
| - | DT-overlays '' | + | DT-overlays '' |
| ```shell | ```shell | ||
| Line 105: | Line 108: | ||
| </ | </ | ||
| - | ===== Configuration DT overlays | + | ===== Configuration DT Overlays |
| - | Need edit the DT overlays configuration file and add custom DT overlays '' | + | You need to edit the DT overlays configuration file and add custom DT overlays '' |
| - | ===== Make custom DT overlays | + | ===== Make custom DT Overlays |
| There are some preparations steps for DT overlays '' | There are some preparations steps for DT overlays '' | ||
| - | ==== Write DT overlay source==== | + | ==== Write DT Overlay Source==== |
| - | Basic example: | + | Basic DT overlay source |
| ```dts example.dts | ```dts example.dts | ||
| Line 132: | Line 135: | ||
| ``` | ``` | ||
| - | ==== Compile DT overlay source | + | ==== Compile DT Overlay Source |
| ```sh | ```sh | ||
| Line 138: | Line 141: | ||
| ``` | ``` | ||
| - | ==== Copy DT overlays | + | ==== Copy DT Overlays |
| * VIM4 is ''/ | * VIM4 is ''/ | ||
| * VIM1S is ''/ | * VIM1S is ''/ | ||
| * Edge2 is ''/ | * Edge2 is ''/ | ||
| - | * VIM1/ | + | * VIM1/ |
| <WRAP important > | <WRAP important > | ||
| - | **BOARD** should be '' | + | **BOARD** should be '' |
| </ | </ | ||
| - | ==== Edit DT overlays configuration | + | ==== Edit DT Overlays Configuration |
| Edit list variable value inside DT overlay configuration file: | Edit list variable value inside DT overlay configuration file: | ||
| * VIM1/ | * VIM1/ | ||
| - | * VIM4 is ''/ | + | * VIM4 is ''/ |
| * VIM1S is ''/ | * VIM1S is ''/ | ||
| * Edge2 is ''/ | * Edge2 is ''/ | ||
Last modified: 2023/11/07 04:18 by nick