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Message-ID: <a8c1bac7-9f67-4476-81ad-5271ff239b91@kwiboo.se>
Date: Tue, 10 Feb 2026 17:53:46 +0100
From: Jonas Karlman <jonas@...boo.se>
To: Fabio Estevam <festevam@...il.com>
Cc: heiko@...ech.de, robh@...nel.org, krzk+dt@...nel.org,
conor+dt@...nel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
linux-kernel@...r.kernel.org, Fabio Estevam <festevam@...ladev.com>
Subject: Re: [PATCH v3 4/4] ARM: dts: rockchip: Add Onion Omega4 Evaluation
Board
Hi Fabio,
On 2/10/2026 3:48 PM, Fabio Estevam wrote:
> From: Fabio Estevam <festevam@...ladev.com>
>
> The Onion Omega4 Evaluation Board is based on the RV1103B SoC and has:
>
> - 256 MB of RAM
> - 256 MB of SPI-NAND
> - Ethernet
> - USB OTG
> - Wifi
> - SD card
> - Camera connector
>
> The details can be found at:
> https://documentation.onioniot.com/omega4/getting-started/
>
> Add the initial support for this board so that it can fully boot into
> Linux with the root file system stored in the SPI NAND.
>
> Signed-off-by: Fabio Estevam <festevam@...ladev.com>
> ---
> Changes since v3:
> - Split it in the EVB and SoM dtsi.
>
> arch/arm/boot/dts/rockchip/Makefile | 1 +
> .../boot/dts/rockchip/rv1103b-omega4-evb.dts | 94 +++++++++++++++++++
> .../arm/boot/dts/rockchip/rv1103b-omega4.dtsi | 21 +++++
> 3 files changed, 116 insertions(+)
> create mode 100644 arch/arm/boot/dts/rockchip/rv1103b-omega4-evb.dts
> create mode 100644 arch/arm/boot/dts/rockchip/rv1103b-omega4.dtsi
>
> diff --git a/arch/arm/boot/dts/rockchip/Makefile b/arch/arm/boot/dts/rockchip/Makefile
> index 716f5540e438..d0154fd7ff24 100644
> --- a/arch/arm/boot/dts/rockchip/Makefile
> +++ b/arch/arm/boot/dts/rockchip/Makefile
> @@ -1,5 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0
> dtb-$(CONFIG_ARCH_ROCKCHIP) += \
> + rv1103b-omega4-evb.dtb \
> rv1108-elgin-r1.dtb \
> rv1108-evb.dtb \
> rv1109-relfor-saib.dtb \
> diff --git a/arch/arm/boot/dts/rockchip/rv1103b-omega4-evb.dts b/arch/arm/boot/dts/rockchip/rv1103b-omega4-evb.dts
> new file mode 100644
> index 000000000000..686f2dd28eab
> --- /dev/null
> +++ b/arch/arm/boot/dts/rockchip/rv1103b-omega4-evb.dts
> @@ -0,0 +1,94 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2022 Rockchip Electronics Co., Ltd.
> + * Copyright (c) 2025 plan44.ch/luz
> + * Copyright (c) 2025 Onion Corporation
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/leds/common.h>
> +#include "rv1103b-omega4.dtsi"
> +
> +/ {
> + model = "Onion Omega4 Evaluation Board";
> + compatible = "onion,rv1103b-omega4-evb", "onion,rv1103b-omega4", "rockchip,rv1103b";
nit: Is rv1103b needed in all three compatible strings? The last one is
already pointing out that this is the rv1103b soc, also the other Onion
Omega boards in-tree use onion,omega and onion,omega2+.
> +
> + aliases {
> + serial0 = &uart0;
> + };
> +
> + chosen {
> + stdout-path = "serial0:115200n8";
> + };
> +
> + leds {
> + compatible = "gpio-leds";
> +
> + led-0 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&led>;
> + gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
> + function = LED_FUNCTION_STATUS;
> + color = <LED_COLOR_ID_BLUE>;
> + label = "sys";
> + default-state = "on";
> + };
> + };
> +};
> +
> +&fspi0 {
> + status = "okay";
> +
> + spi_nand: flash@0 {
> + compatible = "spi-nand";
> + reg = <0>;
> + bootph-pre-ram;
> + bootph-some-ram;
> + spi-max-frequency = <75000000>;
> + spi-rx-bus-width = <4>;
> + spi-tx-bus-width = <1>;
> +
> + partitions {
> + compatible = "fixed-partitions";
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + partition@0 {
> + label = "env";
> + reg = <0x00000000 0x00040000>;
> + };
> +
> + partition@...00 {
> + label = "idblock";
> + reg = <0x00040000 0x00100000>;
> + read-only;
> + };
> +
> + partition@...000 {
> + label = "uboot";
> + reg = <0x00140000 0x00100000>;
> + read-only;
> + };
> +
> + partition@...000 {
> + label = "boot";
> + reg = <0x00240000 0x00800000>;
> + };
> +
> + partition@...000 {
> + label = "ubi";
> + reg = <0x00a40000 0x0f5c0000>;
> + };
> + };
> + };
> +};
The getting started guide [1] list the NAND Flash as part of SOM, should
probably be moved to som dtsi.
[1] https://documentation.onioniot.com/omega4/getting-started/
> +&pinctrl {
> + leds {
> + led: led {
> + rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
> + };
> + };
> +};
> diff --git a/arch/arm/boot/dts/rockchip/rv1103b-omega4.dtsi b/arch/arm/boot/dts/rockchip/rv1103b-omega4.dtsi
> new file mode 100644
> index 000000000000..bf245b547ea2
> --- /dev/null
> +++ b/arch/arm/boot/dts/rockchip/rv1103b-omega4.dtsi
> @@ -0,0 +1,21 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2022 Rockchip Electronics Co., Ltd.
> + * Copyright (c) 2025 plan44.ch/luz
> + * Copyright (c) 2025 Onion Corporation
> + */
> +
> +/dts-v1/;
> +
> +#include "rv1103b.dtsi"
> +
> +&uart0 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&uart0m0_xfer>;
> + bootph-all;
nit: Please sort bootph before pinctrl.
Regards,
Jonas
> + status = "okay";
> +};
> +
> +&wdt {
> + status = "okay";
> +};
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