linux-kernel - Re: [PATCH v5 3/3] arm64: dts: rockchip: Add devicetree for the 9Tripod X3568 v4

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Message-ID: <3719039.iIbC2pHGDl@phil>
Date: Thu, 06 Nov 2025 23:54:45 +0100
From: Heiko Stuebner <heiko@...ech.de>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Dragan Simic <dsimic@...jaro.org>,
 Jonas Karlman <jonas@...boo.se>, Coia Prant <coiaprant@...il.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Coia Prant <coiaprant@...il.com>
Subject:
 Re: [PATCH v5 3/3] arm64: dts: rockchip: Add devicetree for the 9Tripod X3568
 v4

Am Montag, 3. November 2025, 18:17:02 Mitteleuropäische Normalzeit schrieb Coia Prant:
> The 9Tripod X3568 v4 is an RK3568-based SBC, just like the RK3568-EVB.
> It always uses soldered connections between the X3568CV2/X3568CV3/X3568CV4 core board
> and the X3568bv4 I/O board.
> 
> The differences between the core boards
> - PCB size, layout
> - CPU (RKK3568B2/RK3568J)
> - Memory type (DDR4/LPDDR4/LPDDR4X) and size
> - eMMC size
> - DSI/EDP resistor values
> Although the components vary, they maintain full compatibility.
> 
> The X3568 board has multiple hardware revisions, and we currently support v4 (I/O board).
> 
> Specification:
> - SoC: RockChip RK3568 ARM64 (4 cores)
> - eMMC: 16-128 GB
> - RAM: 2-16 GB
> - Power: DC 12V 2A
> - Ethernet: 2x YT8521SC RGMII (10/100/1000 Mbps)
> - Wireless radio: 802.11b/g/n/ac/ax dual-band
> - LED:
>   Power: AlwaysOn
>   User: GPIO
> - Button:
>   VOL+: SARADC/0 <35k µV>
>   VOL-: SARADC/0 <450k µV>
>   Power/Reset: PMIC RK809
> - CAN
>   CAN/1: 4-pin (PH 2.0)
> - PWM
>   PWM/4: Backlight DSI/0 DSI/1
>   PWM/7: IR Receiver [may not install]
> - UART:
>   UART/2: Debug TTL - 1500000 8N1 (1.25mm)
>   UART/3: TTL (PH 2.0)
>   UART/4: TTL (PH 2.0)
>   UART/8: AP6275S Bluetooth
>   UART/9: TTL (PH 2.0)
> - I2C:
>   I2C/0: PMIC RK809
>   I2C/1: Touchscreen DSI/0 DSI/1
>   I2C/4: Camera
>   I2C/5: RTC@51 PCF8563
> - I2S:
>   I2S/0: miniHDMI Sound
>   I2S/1: RK809 Audio Codec
>   I2S/3: AP6275S Bluetooth Sound
> - SDMMC:
>   SDMMC/0: microSD (TF) slot
>   SDMMC/2: AP6275S SDIO WiFi card
> - Camera: 1x CSI
> - Video: miniHDMI / DSI0 (MIPI/LVDS) / DSI1 (MIPI/EDP)
> - Audio: miniHDMI / MIC on-board / Speaker / SPDIF / 3.5mm Headphones / AP6275S Bluetooth
> - USB:
>   USB 2.0 HOST x2
>   USB 2.0 HOST x3 (4-pin)
>   USB 2.0 OTG x1 (shared with USB 3.0 OTG/HOST) [slot may not install]
>   USB 3.0 HOST x1
>   USB 3.0 OTG/HOST x1
> - SATA: 1x SATA 3.0 with Power/4-pin [slot may not install]
> - PCIe: 1x PCIe 3.0 x2 (x4 connecter) [power/clock/slot may not install]
> 
> Link:
> - https://appletsapi.52solution.com/media/X3568V4%E5%BC%80%E5%8F%91%E6%9D%BF%E7%A1%AC%E4%BB%B6%E6%89%8B%E5%86%8C.pdf
> - https://blog.gov.cooking/archives/research-ninetripod-x3568-v4-and-flash.html
> 
> Signed-off-by: Coia Prant <coiaprant@...il.com>

> diff --git a/arch/arm64/boot/dts/rockchip/rk3568-9tripod-x3568-v4-video-demo.dtso b/arch/arm64/boot/dts/rockchip/rk3568-9tripod-x3568-v4-video-demo.dtso
> new file mode 100644
> index 000000000..e7fa1ca48
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3568-9tripod-x3568-v4-video-demo.dtso
> @@ -0,0 +1,154 @@
> +// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
> +
> +// This is a sample reference, due to lack of hardware can not be tested, at your own risk

and I've also dropped the 2nd overlay now.
Please only ever submit patches for stuff you have actually tested.

We don't really add stuff with "use at your own risk" caveats ;-)


Heiko