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Everest Charge SOM 0.9.0 additions #102

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d180633
Charge SOM: Update to latest Linux branch
lategoodbye May 8, 2026
4d91710
Charge SOM: Add RTC & TPM to Hardware
lategoodbye May 8, 2026
da4ed13
Charge SOM: Additional I²C interfaces are available as overlay
lategoodbye May 8, 2026
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30 changes: 29 additions & 1 deletion docs/source/hardware.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -157,7 +157,7 @@ still depend on the pinmuxing of these 16 pins!
+===============+==================+===================================+===========================================+
| SPI | 1 | | |
+---------------+------------------+-----------------------------------+-------------------------------------------+
| I²C | 3 | | |
| I²C | 3 | - imx93-charge-som-i2c5.dtso | |
+---------------+------------------+-----------------------------------+-------------------------------------------+
| UART [#]_ | 1 | - imx93-charge-som-uart7.dtso | without RTS/CTS |
+---------------+------------------+-----------------------------------+-------------------------------------------+
Expand Down Expand Up @@ -322,3 +322,31 @@ The i.MX93 on the Charge SOM provides several I²C interfaces:
+----------+------------+-------------------------------------+-----------------+

.. [#] This interface is only enabled in case of a Charge SOM Single Channel DC Carrier Board.

In to use the other I²C interfaces configure the matching DT overlays in the bootloader.

***
RTC
***

The Single Channel DC Carrier Board is equipped with a super cap buffered RTC.
This RTC is available via Linux device ``/dev/rtc0``. As per default the EVerest
firmware tries to synchronize the RTC via NTP and make sure that Backup Switch
Over Mode is properly configured.

In case the Single Channel DC Carrier Board doesn't have NTP access, the RTC
must be configured manually:

.. code-block:: console

timedatectl set-ntp false
timedatectl set-time "YYYY-MM-DD hh:mm:ss"
hwclock --param-set bsm=0x2


***
TPM
***

The Charge SOM includes a TPM 2.0 compliant chip.
This TPM is available via Linux device ``/dev/tpm0``.
14 changes: 9 additions & 5 deletions docs/source/troubleshooting.rst
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Expand Up @@ -148,7 +148,7 @@ The `Distec DD-0700-MC01 <https://www.fortec-integrated.de/en/products/tft-compo
I like to create my own DT overlay. Is there an example?
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Yes, please have a look at this `commit <https://github.com/chargebyte/linux/commit/125a587a0cf7e8d9db1fdddf9383a67c2b46d107>`_ .
Yes, please have a look at this `commit <https://github.com/chargebyte/linux/commit/f078308d85a0820e19aed387e8f1e01b8eafe041>`_ .


Where can I find the device tree sources of the Charge SOM?
Expand All @@ -166,19 +166,23 @@ The device tree sources of the Charge SOM are divided into multiple layers:
* - i.MX93
- 0
- SoC
- `imx93.dtsi <https://github.com/chargebyte/linux/blob/v6.6.23-2.0.0-phy-cb/arch/arm64/boot/dts/freescale/imx93.dtsi>`_
- `imx93.dtsi <https://github.com/chargebyte/linux/blob/v6.12.34-2.1.0-phy-cb/arch/arm64/boot/dts/freescale/imx93.dtsi>`_
* - phyCORE-i.MX93
- 1
- SoM
- `imx93-phycore-som.dtsi <https://github.com/chargebyte/linux/blob/v6.6.23-2.0.0-phy-cb/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi>`_
- `imx93-phycore-som.dtsi <https://github.com/chargebyte/linux/blob/v6.12.34-2.1.0-phy-cb/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi>`_
* - Charge SOM
- 2
- SoM
- `imx93-charge-som.dtsi <https://github.com/chargebyte/linux/blob/v6.6.23-2.0.0-phy-cb/arch/arm64/boot/dts/freescale/imx93-charge-som.dtsi>`_
- `imx93-charge-som.dtsi <https://github.com/chargebyte/linux/blob/v6.12.34-2.1.0-phy-cb/arch/arm64/boot/dts/freescale/imx93-charge-som.dtsi>`_
* - Charge SOM Single Channel DC Carrier Board
- 3
- Board
- `imx93-charge-som-dc-evb.dts <https://github.com/chargebyte/linux/blob/v6.6.23-2.0.0-phy-cb/arch/arm64/boot/dts/freescale/imx93-charge-som-dc-evb.dts>`_
- `imx93-charge-som-dc-evb.dts <https://github.com/chargebyte/linux/blob/v6.12.34-2.1.0-phy-cb/arch/arm64/boot/dts/freescale/imx93-charge-som-dc-evb.dts>`_
* - UART7 overlay
- 4
- Overlay
- `imx93-charge-som-uart7.dtso <https://github.com/chargebyte/linux/blob/v6.12.34-2.1.0-phy-cb/arch/arm64/boot/dts/freescale/imx93-charge-som-uart7.dtso>`_


How can I access the EVerest admin panel on Charge SOM?
Expand Down
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