On 2025/1/13 12:25, Dragan Simic wrote:

Hello Junhao,

On 2025-01-12 23:16, Junhao Xie wrote:

quoted

On 2025/1/12 16:47, Dragan Simic wrote:

quoted

On 2025-01-12 08:33, Junhao Xie wrote:

quoted

Add dts for Ariaboard Photonicat RK3568.

Working IO:
    Debug UART
    SDIO QCA9377 WiFi and Bluetooth
    M.2 E-Key PCIe WiFi and Bluetooth
    M.2 B-Key USB Modem WWAN
    Ethernet WAN Port
    MicroSD Card slot
    eMMC
    HDMI Output
    Mali GPU
    USB Type-A

Not working IO:
    Ethernet LAN Port (Lack of SGMII support)
    Power management MCU on UART4 (Driver pending)

Not working IO in MCU:
    Battery voltage sensor
    Board temperature sensor
    Hardware Power-off
    Hardware Watchdog
    Network status LED
    Real-time clock
    USB Charger voltage sensor

About onboard power management MCU:
    A heartbeat must be sent to the MCU within 60 seconds,
    otherwise the MCU will restart the system.
    When powering off, a shutdown command needs to be sent to the MCU.
    When the power button is long pressed, the MCU will send a shutdown
    command to the system. If system does not shutdown within 60 seconds,
    the power will be turned off directly.
    MCU only provides voltage for charger and battery.
    Manufacturer removed RK8xx PMIC.

Unless the design of the board is proprietary, it would be good
to provide a link to the board schematic, for those interested
in verifying the board DT file.

As a note, I already tried to find the board schematic with no
success, so the design might be proprietary.

Yes, this board is proprietary. I asked the manufacturer and
they don't provide schematics.

But I found a partial schematic diagram of some of connectors
on the board here
https://dl.ariaboard.com/photonicat_rk3568/Photonicat%20rk3568%20EVB%20Board%20spec.pdf

Yes, I also found that PDF file.  It's somewhat similar to what
Raspberry Pi provides with its reduced schematics -- helpful to
an extent, but still leaving a lot to be desired.

Out of curiosity, what did you actually use as a reference to create
the board dts file?  Perhaps some downstream dts file provided by
the manufacturer or found in some operating system image?

I wrote this device tree based on other rk3568 devices in mainline, and downstream board dts:
https://github.com/photonicat/rockchip_rk3568_kernel/blob/novotech-5.10/arch/arm64/boot/dts/rockchip/rk3568-photonicat-base.dtsi

Best regards,
Junhao