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cape-spec WIP

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boards/capes/cape-interface-spec.rst
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......@@ -14,10 +14,12 @@ Background and overview
Resources
* See `Device Tree: Supporting Similar Boards - The BeagleBone Example blog post <https://beagleboard.org/blog/2022-03-31-device-tree-supporting-similar-boards-the-beaglebone-example>`_ blog post on BeagleBoard.org
* See `Device Tree: Supporting Similar Boards - The BeagleBone Example blog post <https://beagleboard.org/blog/2022-03-31-device-tree-supporting-similar-boards-the-beaglebone-example>`_ on BeagleBoard.org
* See `spreadsheet with pin header details <https://docs.google.com/spreadsheets/d/1fE-AsDZvJ-bBwzNBj1_sPDrutvEvsmARqFwvbw_HkrE/edit?usp=sharing>`_
* See `elinux.org Cape Expansion Headers for BeagleBone page <https://elinux.org/Beagleboard:Cape_Expansion_Headers>`_
* See :ref:`BeagleBone Black System Reference Manual Connectors section <beagleboneblack-connectors>`
* See :ref:`BeagleBone AI System Reference Manual Connectors section <beaglebone-ai-connectors>`
* See :ref:`BeagleBone AI-64 System Reference Manual Connectors section <TODO>`
.. note:: Below, when mentioning "Black", this is true for all AM3358-based BeagleBone boards. "AI" is AM5729-based. "AI-64" is TDA4VM-based.
......@@ -25,7 +27,7 @@ The device tree symbols for the BeagleBone Cape Compatibility Layer are provided
* Black: `bbb-bone-buses.dtsi <https://git.beagleboard.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v5.10.x-ti-unified/src/arm/bbb-bone-buses.dtsi>`_
* AI: `bbai-bone-buses.dtsi <https://git.beagleboard.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v5.10.x-ti-unified/src/arm/bbai-bone-buses.dtsi>`_
* AI-64: `k3-j721e-beagleboneai-64-bone-buses.dtsi#9 <https://git.beagleboard.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v5.10.x-ti-unified/src/arm64/k3-j721e-beagleboneai64-bone-buses.dtsi>`_
* AI-64: `k3-j721e-beagleboneai-64-bone-buses.dtsi <https://git.beagleboard.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v5.10.x-ti-unified/src/arm64/k3-j721e-beagleboneai64-bone-buses.dtsi>`_
The udev rules used to create the userspace symlinks for the BeagleBone Cape Compatibility Layer are provided in `usr-customizations <https://git.beagleboard.org/beagleboard/usr-customizations>`_ at:
......@@ -33,61 +35,61 @@ More details can be found in :ref:`bone-methodology`.
.. table:: Overall
+-----------------------------------------------+-----+------------------------------------+
| .. centered:: P9 | | .. centered:: P8 |
+===============+=====+======+==================+=====+===========+=====+======+===========+
| Functions | odd | even | Functions | | Functions | odd | even | Functions |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| USB D+ | E1 | E2 | USB D- | | - | - | - | - |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| 5V OUT | E3 | E4 | GND | | - | - | - | - |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| GND | 1 | 2 | GND | | GND | 1 | 2 | GND |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| 3V3 OUT | 3 | 4 | 3V3 OUT | | D M | 3 | 4 | D M |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| 5V IN | 5 | 6 | 5V IN | | D M C4t | 5 | 6 | D M C4r |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| 5V OUT | 7 | 8 | 5V OUT | | C2r D | 7 | 8 | C2t D |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| PWR BUT | 9 | 10 | RESET | | D C3r | 9 | 10 | D C3t |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D U4r | 11 | 12 | D | | D P0o | 11 | 12 | D Q2a P0o |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D U4t | 13 | 14 | D E1a | | D E2b | 13 | 14 | D |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D | 15 | 16 | D E1b | | D P0i | 15 | 16 | D P0i |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D I1c S00 | 17 | 18 | D I1d S0o | | D | 17 | 18 | D |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| C0r D I2c | 19 | 20 | C0t D I2d | | D E2a | 19 | 20 | D M P1 |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D E0b S0i U2t | 21 | 22 | D E0a S0c U2r | | D M P1 | 21 | 22 | D M Q2b |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D S01 | 23 | 24 | C1r D I3c U1t | | D M | 23 | 24 | D M |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D P0 | 25 | 26 | C1t D I3d U1r | | D M | 25 | 26 | D |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D P0 Q0b | 27 | 28 | D P0 S10 | | D L P1 | 27 | 28 | D L P1 |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D E S1i P0 | 29 | 30 | D P0 S1o | | D L P1 | 29 | 30 | D L P1 |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D E S1c P0 | 31 | 32 | ADC VDD | | D L | 31 | 32 | D L |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| A4 | 33 | 34 | ADC GND | | D L Q1b | 33 | 34 | D E L |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| A6 | 35 | 36 | A5 | | D L Q1a | 35 | 36 | D E L |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| A2 | 37 | 38 | A3 | | D L U5t | 37 | 38 | D L U5r |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| A0 | 39 | 40 | A1 | | D L P1 | 39 | 40 | D L P1 |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| D P0 | 41 | 42 | D Q0a S11 U3t P0 | | D L P1 | 41 | 42 | D L P1 |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| GND | 43 | 44 | GND | | D L P1 | 43 | 44 | D L P1 |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
| GND | 45 | 46 | GND | | D E L P1 | 45 | 46 | D E L P1 |
+---------------+-----+------+------------------+-----+-----------+-----+------+-----------+
+-----------------------------------------------+-----+--------------------------------------+
| .. centered:: P9 | | .. centered:: P8 |
+===============+=====+======+==================+=====+============+=====+======+============+
| Functions | odd | even | Functions | | Functions | odd | even | Functions |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| USB D+ | E1 | E2 | USB D- | | | | | |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| 5V OUT | E3 | E4 | GND | | | | | |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| GND | 1 | 2 | GND | | GND | 1 | 2 | GND |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| 3V3 OUT | 3 | 4 | 3V3 OUT | | D M | 3 | 4 | D M |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| 5V IN | 5 | 6 | 5V IN | | D M C4t | 5 | 6 | D M C4r |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| 5V OUT | 7 | 8 | 5V OUT | | C2r D | 7 | 8 | C2t D |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| PWR BUT | 9 | 10 | RESET | | D C3r | 9 | 10 | D C3t |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D U4r | 11 | 12 | D | | D P0o | 11 | 12 | D Q2a P0o |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D U4t | 13 | 14 | D E1a | | D E2b | 13 | 14 | D |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D | 15 | 16 | D E1b | | D P0i | 15 | 16 | D P0i |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D I1c S00 | 17 | 18 | D I1d S0o | | D | 17 | 18 | D |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| C0r D I2c | 19 | 20 | C0t D I2d | | D E2a | 19 | 20 | D M P1 |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D E0b S0i U2t | 21 | 22 | D E0a S0c U2r | | D M P1 | 21 | 22 | D M Q2b |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D S01 | 23 | 24 | C1r D I3c U1t | | D M | 23 | 24 | D M |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D P0 | 25 | 26 | C1t D I3d U1r | | D M | 25 | 26 | D |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D P0 Q0b | 27 | 28 | D P0 S10 | | D L P1 | 27 | 28 | D L P1 U6r |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D E S1i P0 | 29 | 30 | D P0 S1o | | D L P1 U6t | 29 | 30 | D L P1 |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D E S1c P0 | 31 | 32 | ADC VDD | | D L | 31 | 32 | D L |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| A4 | 33 | 34 | ADC GND | | D L Q1b | 33 | 34 | D E L |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| A6 | 35 | 36 | A5 | | D L Q1a | 35 | 36 | D E L |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| A2 | 37 | 38 | A3 | | D L U5t | 37 | 38 | D L U5r |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| A0 | 39 | 40 | A1 | | D L P1 | 39 | 40 | D L P1 |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| D P0 | 41 | 42 | D Q0a S11 U3t P0 | | D L P1 | 41 | 42 | D L P1 |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| GND | 43 | 44 | GND | | D L P1 | 43 | 44 | D L P1 |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
| GND | 45 | 46 | GND | | D E L P1 | 45 | 46 | D E L P1 |
+---------------+-----+------+------------------+-----+------------+-----+------+------------+
.. note:
......@@ -114,28 +116,29 @@ Digital GPIO
The compatibility layer comes with simple reference nodes for attaching the Linux gpio-leds or gpio-keys to any cape header GPIO pin. This provides simple userspace general purpose input or output with various trigger modes.
The format followed for the gpio-leds nodes is **bone_led_P8_## / bone_led_P9_##**. The **gpio-leds** driver is used by these reference nodes internally and allows users to easily create compatible led nodes in overlays for Black, AI and AI-64. For the definitions, you can see
The format followed for the gpio-leds nodes is **bone_led_P8_## / bone_led_P9_##**. The **gpio-leds** driver is used by these reference nodes internally and allows users to easily create compatible led nodes in overlays for Black, AI and AI-64.
Example overlays
-----------------
.. table:: Bone LEDs Overlay Examples
.. code-block:: c
:linenos:
:caption: Example device tree overlay to enable LED driver on header P8 pin 3
:name: bone_cape_spec_led_example
+---------+------+-------------------------------------------------------------------------------------------------------------------------------------------------------+
| Header | Pin | Overlay |
+=========+======+=======================================================================================================================================================+
| P8 | 3 | `BONE-LED_P8_03.dts <https://git.beagleboard.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v5.10.x-ti-unified/src/arm/overlays/LED_P8_03.dts>`_ |
+---------+------+-------------------------------------------------------------------------------------------------------------------------------------------------------+
| P8 | 4 | `BONE-LED_P8_04.dts <https://git.beagleboard.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v5.10.x-ti-unified/src/arm/overlays/LED_P8_04.dts>`_ |
+---------+------+-------------------------------------------------------------------------------------------------------------------------------------------------------+
/dts-v1/;
/plugin/;
Definitions
-----------------
&bone_led_P8_03 {
status = "okay";
}
.. table:: Bone keys and LEDs
In :ref:`bone_cape_spec_led_example`, it is possible to redefine the default label
and other properties defined in the
`gpio-leds schema <https://elixir.bootlin.com/linux/v5.10/source/Documentation/devicetree/bindings/leds/leds-gpio.yaml>`_.
.. table:: Bone GPIO LEDs interface
+------------------------+-------------+----------+-----------+-----------+
| LED | Header pin | Black | AI | AI-64 |
| LED SYSFS | Header pin | Black | AI | AI-64 |
+========================+=============+==========+===========+===========+
| /sys/class/leds/P8_03 | P8_03 | gpio1_6 | gpio1_24 | gpio0_20 |
+------------------------+-------------+----------+-----------+-----------+
......@@ -267,19 +270,19 @@ Definitions
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_31 | P9_31 | gpio3_14 | gpio5_10 | gpio0_52 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_33 | P9_33 | NA | NA | gpio0_50 |
| /sys/class/leds/P9_33 | P9_33 | *n/a* | *n/a* | gpio0_50 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_35 | P9_35 | NA | NA | gpio0_55 |
| /sys/class/leds/P9_35 | P9_35 | *n/a* | *n/a* | gpio0_55 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_36 | P9_36 | NA | NA | gpio0_56 |
| /sys/class/leds/P9_36 | P9_36 | *n/a* | *n/a* | gpio0_56 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_37 | P9_37 | NA | NA | gpio0_57 |
| /sys/class/leds/P9_37 | P9_37 | *n/a* | *n/a* | gpio0_57 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_38 | P9_38 | NA | NA | gpio0_58 |
| /sys/class/leds/P9_38 | P9_38 | *n/a* | *n/a* | gpio0_58 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_39 | P9_39 | NA | NA | gpio0_54 |
| /sys/class/leds/P9_39 | P9_39 | *n/a* | *n/a* | gpio0_54 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_40 | P9_40 | NA | NA | gpio0_81 |
| /sys/class/leds/P9_40 | P9_40 | *n/a* | *n/a* | gpio0_81 |
+------------------------+-------------+----------+-----------+-----------+
| /sys/class/leds/P9_41 | P9_41 | gpio0_20 | gpio6_20 | gpio1_0 |
+------------------------+-------------+----------+-----------+-----------+
......@@ -297,60 +300,62 @@ Compatibility layer provides simple I2C bone bus nodes for creating compatible o
.. table:: Bone I2C
+------------------+--------------+--------+-------+------------+-----------------+--------+---------------+
| SYSFS | DT symbol | Black | AI | AI-64 | SCL | SDA | Overlay |
+==================+==============+========+=======+============+=================+========+===============+
| /dev/bone/i2c/0 | bone_i2c_0 | I2C0 | I2C1 | TBD | .. centered:: N/A (On-board) |
+------------------+--------------+--------+-------+------------+-----------------+--------+---------------+
| /dev/bone/i2c/1 | bone_i2c_1 | I2C1 | I2C5 | MAIN_I2C6 | P9.17 | P9.18 | BONE-I2C1.dts |
+------------------+--------------+--------+-------+------------+-----------------+--------+---------------+
| /dev/bone/i2c/2 | bone_i2c_2 | I2C2 | I2C4 | MAIN_I2C3 | P9.19 | P9.20 | BONE-I2C2.dts |
+------------------+--------------+--------+-------+------------+-----------------+--------+---------------+
| /dev/bone/i2c/3 | bone_i2c_3 | I2C1 | I2C3 | MAIN_I2C4 | P9.24 | P9.26 | BONE-I2C3.dts |
+------------------+--------------+--------+-------+------------+-----------------+--------+---------------+
| /dev/bone/i2c/4 | bone_i2c_4 | I2C2 | N/A | MAIN_I2C3 | P9.21 | P9.22 | BONE-I2C4.dts |
+------------------+--------------+--------+-------+------------+-----------------+--------+---------------+
+------------------+--------------+--------+-------+------------+-----------------+--------+-----------+
| SYSFS | DT symbol | Black | AI | AI-64 | SCL | SDA | Overlay |
+==================+==============+========+=======+============+=================+========+===========+
| /dev/bone/i2c/0 | bone_i2c_0 | I2C0 | I2C1 | TBD | .. centered:: N/A (On-board) |
+------------------+--------------+--------+-------+------------+-----------------+--------+-----------+
| /dev/bone/i2c/1 | bone_i2c_1 | I2C1 | I2C5 | MAIN_I2C6 | P9.17 | P9.18 | BONE-I2C1 |
+------------------+--------------+--------+-------+------------+-----------------+--------+-----------+
| /dev/bone/i2c/2 | bone_i2c_2 | I2C2 | I2C4 | MAIN_I2C3 | P9.19 | P9.20 | BONE-I2C2 |
+------------------+--------------+--------+-------+------------+-----------------+--------+-----------+
| /dev/bone/i2c/3 | bone_i2c_3 | I2C1 | I2C3 | MAIN_I2C4 | P9.24 | P9.26 | BONE-I2C3 |
+------------------+--------------+--------+-------+------------+-----------------+--------+-----------+
| /dev/bone/i2c/4 | bone_i2c_4 | I2C2 | - | MAIN_I2C3 | P9.21 | P9.22 | BONE-I2C4 |
+------------------+--------------+--------+-------+------------+-----------------+--------+-----------+
SPI
-----
***
SPI bone bus nodes allow creating compatible overlays for Black, AI and AI-64. For the definitions, you can see `bbai-bone-buses.dtsi#L406 <https://github.com/lorforlinux/BeagleBoard-DeviceTrees/blob/97a6f0daa9eab09633a2064f68a53b107d6e3968/src/arm/bbai-bone-buses.dtsi#L406>`_ & `bbb-bone-buses.dtsi#L423 <https://github.com/lorforlinux/BeagleBoard-DeviceTrees/blob/97a6f0daa9eab09633a2064f68a53b107d6e3968/src/arm/bbb-bone-buses.dtsi#L423>`_.
SPI bone bus nodes allow creating compatible overlays for Black, AI and AI-64.
.. table:: Bone bus SPI
+--------------------+------------+--------+-------+------------+--------+--------+--------+---------------------------------------+--------------------------------------------------------------------------------------------------------------+
| Bone bus | DT symbol | Black | AI | AI-64 | SDO | SDI | CLK | CS | Overlay |
+====================+============+========+=======+============+========+========+========+=======================================+==============================================================================================================+
| /dev/bone/spi/0.x | bone_spi_0 | SPI0 | SPI2 | MAIN_SPI6 | P9.18 | P9.21 | P9.22 | - P9.17 (CS0) | - `BONE-SPI0_0.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_spi/src/arm/BONE-SPI0_0.dts>`_ |
| | | | | | | | | - P9.23 (CS1 - BBAI and BBAI64 only) | - `BONE-SPI0_0.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_spi/src/arm/BONE-SPI0_1.dts>`_ |
+--------------------+------------+--------+-------+------------+--------+--------+--------+---------------------------------------+--------------------------------------------------------------------------------------------------------------+
| /dev/bone/spi/1.x | bone_spi_1 | SPI1 | SPI3 | MAIN_SPI7 | P9.30 | P9.29 | P9.31 | - P9.28 (CS0) | - `BONE-SPI0_0.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_spi/src/arm/BONE-SPI1_0.dts>`_ |
| | | | | | | | | - P9.42 (CS1) | - `BONE-SPI0_0.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_spi/src/arm/BONE-SPI1_1.dts>`_ |
+--------------------+------------+--------+-------+------------+--------+--------+--------+---------------------------------------+--------------------------------------------------------------------------------------------------------------+
+--------------------+------------+--------+-------+------------+--------+--------+--------+---------------------------------------+---------------+
| Bone bus | DT symbol | Black | AI | AI-64 | SDO | SDI | CLK | CS | Overlays |
+====================+============+========+=======+============+========+========+========+=======================================+===============+
| /dev/bone/spi/0.x | bone_spi_0 | SPI0 | SPI2 | MAIN_SPI6 | P9.18 | P9.21 | P9.22 | - P9.17 (CS0) | - BONE-SPI0_0 |
| | | | | | | | | - P9.23 (CS1 - BBAI and BBAI64 only) | - BONE-SPI0_1 |
+--------------------+------------+--------+-------+------------+--------+--------+--------+---------------------------------------+---------------+
| /dev/bone/spi/1.x | bone_spi_1 | SPI1 | SPI3 | MAIN_SPI7 | P9.30 | P9.29 | P9.31 | - P9.28 (CS0) | - BONE-SPI1_0 |
| | | | | | | | | - P9.42 (CS1) | - BONE-SPI1_1 |
+--------------------+------------+--------+-------+------------+--------+--------+--------+---------------------------------------+---------------+
UART
-----
*****
UART bone bus nodes allow creating compatible overlays for Black, AI and AI-64. For the definitions, you can see `bbai-bone-buses.dtsi#L367 <https://github.com/lorforlinux/BeagleBoard-DeviceTrees/blob/97a6f0daa9eab09633a2064f68a53b107d6e3968/src/arm/bbai-bone-buses.dtsi#L367>`_ & `bbb-bone-buses.dtsi#L382 <https://github.com/lorforlinux/BeagleBoard-DeviceTrees/blob/97a6f0daa9eab09633a2064f68a53b107d6e3968/src/arm/bbb-bone-buses.dtsi#L382>`_
UART bone bus nodes allow creating compatible overlays for Black, AI and AI-64.
.. table:: Bone bus UART
+-------------------+--------+--------+-----------------------+----------------------------------+--------+---------------------------------------------+---------------------------------------------+-----------------------------------------------------------------------------------------------------------+
| Bone bus | Black | AI | AI-64 | TX | RX | RTSn | CTSn | Overlays |
+===================+========+========+=======================+==================================+========+=============================================+=============================================+===========================================================================================================+
| /dev/bone/uart/0 | UART0 | UART1 | MAIN_UART0 | .. centered:: NA (console debug header pins) |
+-------------------+--------+--------+-----------------------+----------------------------------+--------+---------------------------------------------+---------------------------------------------+-----------------------------------------------------------------------------------------------------------+
| /dev/bone/uart/1 | UART1 | UART10 | MAIN_UART2 | P9.24 | P9.26 | P9.19 P8.4 (N/A on AM3358) | P9.20 P8.3 (N/A on AM3358) | `BONE-UART1.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_uart/src/arm/BONE-UART1.dts>`_ |
+-------------------+--------+--------+-----------------------+----------------------------------+--------+---------------------------------------------+---------------------------------------------+-----------------------------------------------------------------------------------------------------------+
| /dev/bone/uart/2 | UART2 | UART3 | - | P9.21 | P9.22 | P8.38 (N/A on AM5729) | P8.37 (N/A on AM5729) | `BONE-UART2.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_uart/src/arm/BONE-UART2.dts>`_ |
+-------------------+--------+--------+-----------------------+----------------------------------+--------+---------------------------------------------+---------------------------------------------+-----------------------------------------------------------------------------------------------------------+
| /dev/bone/uart/3 | UART3 | - | - | P9.42 | NA | - | - | `BONE-UART3.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_uart/src/arm/BONE-UART3.dts>`_ |
+-------------------+--------+--------+-----------------------+----------------------------------+--------+---------------------------------------------+---------------------------------------------+-----------------------------------------------------------------------------------------------------------+
| /dev/bone/uart/4 | UART4 | UART5 | MAIN_UART0 (console) | P9.13 | P9.11 | P8.33 (N/A on AM5729) P8.6 (N/A on AM3358) | P8.35 (N/A on AM5729) P8.5 (N/A on AM3358) | `BONE-UART4.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_uart/src/arm/BONE-UART4.dts>`_ |
+-------------------+--------+--------+-----------------------+----------------------------------+--------+---------------------------------------------+---------------------------------------------+-----------------------------------------------------------------------------------------------------------+
| /dev/bone/uart/5 | UART5 | UART8 | MAIN_UART5 | P8.37 | P8.38 | P8.32 | P8.31 | `BONE-UART5.dts <https://github.com/lorforlinux/bb.org-overlays/blob/bone_uart/src/arm/BONE-UART5.dts>`_ |
+-------------------+--------+--------+-----------------------+----------------------------------+--------+---------------------------------------------+---------------------------------------------+-----------------------------------------------------------------------------------------------------------+
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
| Bone bus | DT symbol | Black | AI | AI-64 | TX | RX | RTSn | CTSn | Overlays |
+===================+==============+========+========+=======================+========+========+=============================================+=============================================+============+
| /dev/bone/uart/0 | bone_uart_0 | UART0 | UART1 | MAIN_UART0 | .. centered:: NA (console debug header pins) |
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
| /dev/bone/uart/1 | bone_uart_1 | UART1 | UART10 | MAIN_UART2 | P9.24 | P9.26 | P9.19 P8.4 (N/A on AM3358) | P9.20 P8.3 (N/A on AM3358) | BONE-UART1 |
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
| /dev/bone/uart/2 | bone_uart_2 | UART2 | UART3 | *n/a* | P9.21 | P9.22 | P8.38 (N/A on AM5729) | P8.37 (N/A on AM5729) | BONE-UART2 |
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
| /dev/bone/uart/3 | bone_uart_3 | UART3 | *n/a* | *n/a* | P9.42 | *n/a* | *n/a* | *n/a* | BONE-UART3 |
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
| /dev/bone/uart/4 | bone_uart_4 | UART4 | UART5 | MAIN_UART0 (console) | P9.13 | P9.11 | P8.33 (N/A on AM5729) P8.6 (N/A on AM3358) | P8.35 (N/A on AM5729) P8.5 (N/A on AM3358) | BONE-UART4 |
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
| /dev/bone/uart/5 | bone_uart_5 | UART5 | UART8 | MAIN_UART5 | P8.37 | P8.38 | P8.32 | P8.31 | BONE-UART5 |
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
| /dev/bone/uart/6 | bone_uart_6 | *n/a* | *n/a* | MAIN_UART8 | P8.29 | P8.28 | *n/a* | *n/a* | BONE-UART6 |
+-------------------+--------------+--------+--------+-----------------------+--------+--------+---------------------------------------------+---------------------------------------------+------------+
CAN
......
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