From: Fabio Estevam <[email protected]>

Add the initial support for Onion's Omega4 RV1103B board, using the
board devicetree files as merged in Linux v7.1, which split the board
into rv1103b-omega4.dtsi and rv1103b-omega4-evb.dts

It boots from the SPI NAND.

Tested the boot of a 6.6 OpenWRT kernel and also a 6.19-rc8 mainline
kernel.

Signed-off-by: Fabio Estevam <[email protected]>
Signed-off-by: Simon Glass <[email protected]>
---

Changes in v3:
- Split out the SoC support into its own patch (Jonas)
- Move the board devicetree files into this patch (Jonas)
- Add the board to the list in the Rockchip documentation
- Extend the MAINTAINERS entry to cover all the RV1103B files
- Use the board devicetree files as merged in Linux v7.1 and switch
  the default devicetree to rv1103b-omega4-evb

Changes in v2:
- Use RV1103B rather than RV1103, which is the correct SoC name

 arch/arm/dts/rv1103b-omega4-evb-u-boot.dtsi   |  10 ++
 arch/arm/dts/rv1103b-omega4-evb.dts           |  63 ++++++++
 arch/arm/dts/rv1103b-omega4.dtsi              | 147 ++++++++++++++++++
 arch/arm/mach-rockchip/rv1103b/Kconfig        |   7 +
 board/onion/omega4_rv1103b/Kconfig            |  12 ++
 board/onion/omega4_rv1103b/MAINTAINERS        |  15 ++
 board/onion/omega4_rv1103b/Makefile           |   7 +
 board/onion/omega4_rv1103b/omega4_rv1103b.c   |  19 +++
 board/onion/omega4_rv1103b/omega4_rv1103b.env |   5 +
 configs/omega4-rv1103b_defconfig              |  82 ++++++++++
 doc/board/index.rst                           |   1 +
 doc/board/onion/index.rst                     |   9 ++
 doc/board/onion/omega4-rv1103b.rst            |  56 +++++++
 doc/board/rockchip/rockchip.rst               |   3 +
 include/configs/omega4_rv1103b.h              |  11 ++
 15 files changed, 447 insertions(+)
 create mode 100644 arch/arm/dts/rv1103b-omega4-evb-u-boot.dtsi
 create mode 100644 arch/arm/dts/rv1103b-omega4-evb.dts
 create mode 100644 arch/arm/dts/rv1103b-omega4.dtsi
 create mode 100644 board/onion/omega4_rv1103b/Kconfig
 create mode 100644 board/onion/omega4_rv1103b/MAINTAINERS
 create mode 100644 board/onion/omega4_rv1103b/Makefile
 create mode 100644 board/onion/omega4_rv1103b/omega4_rv1103b.c
 create mode 100644 board/onion/omega4_rv1103b/omega4_rv1103b.env
 create mode 100644 configs/omega4-rv1103b_defconfig
 create mode 100644 doc/board/onion/index.rst
 create mode 100644 doc/board/onion/omega4-rv1103b.rst
 create mode 100644 include/configs/omega4_rv1103b.h

diff --git a/arch/arm/dts/rv1103b-omega4-evb-u-boot.dtsi 
b/arch/arm/dts/rv1103b-omega4-evb-u-boot.dtsi
new file mode 100644
index 00000000000..c7616de1715
--- /dev/null
+++ b/arch/arm/dts/rv1103b-omega4-evb-u-boot.dtsi
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
+// (C) Copyright 2024 Rockchip Electronics Co., Ltd
+
+#include "rockchip-u-boot.dtsi"
+
+/ {
+       chosen {
+               u-boot,spl-boot-order = &spi_nand;
+       };
+};
diff --git a/arch/arm/dts/rv1103b-omega4-evb.dts 
b/arch/arm/dts/rv1103b-omega4-evb.dts
new file mode 100644
index 00000000000..c6472f933aa
--- /dev/null
+++ b/arch/arm/dts/rv1103b-omega4-evb.dts
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2022 Rockchip Electronics Co., Ltd.
+ * Copyright (c) 2025 plan44.ch/luz
+ * Copyright (c) 2026 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,omega4-evb", "onion,omega4", "rockchip,rv1103b";
+
+       aliases {
+               serial0 = &uart0;
+       };
+
+       chosen {
+               stdout-path = "serial0:115200n8";
+       };
+
+       leds {
+               compatible = "gpio-leds";
+
+               led-0   {
+                       color = <LED_COLOR_ID_BLUE>;
+                       default-state = "on";
+                       function = LED_FUNCTION_STATUS;
+                       gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
+                       label = "sys";
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&led>;
+               };
+       };
+};
+
+&fspi0 {
+       status = "okay";
+};
+
+&pinctrl {
+       leds {
+               led: led {
+                       rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
+               };
+       };
+};
+
+&sdmmc0 {
+       status = "okay";
+};
+
+&sdmmc1 {
+       status = "okay";
+};
+
+&uart0 {
+       status = "okay";
+};
diff --git a/arch/arm/dts/rv1103b-omega4.dtsi b/arch/arm/dts/rv1103b-omega4.dtsi
new file mode 100644
index 00000000000..6a8e8e0f80c
--- /dev/null
+++ b/arch/arm/dts/rv1103b-omega4.dtsi
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2022 Rockchip Electronics Co., Ltd.
+ * Copyright (c) 2025 plan44.ch/luz
+ * Copyright (c) 2026 Onion Corporation
+ */
+
+/dts-v1/;
+
+#include "rv1103b.dtsi"
+
+/ {
+       sdio_pwrseq: sdio-pwrseq {
+               compatible = "mmc-pwrseq-simple";
+               pinctrl-names = "default";
+               pinctrl-0 = <&wifi_enable_h>;
+               post-power-on-delay-ms = <300>;
+               reset-gpios = <&gpio2 RK_PB2 GPIO_ACTIVE_LOW>;
+       };
+
+       vcc3v3_sd: vcc3v3-sd {
+               compatible = "regulator-fixed";
+               gpio = <&gpio0 RK_PA4 GPIO_ACTIVE_LOW>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&sdmmc_pwren>;
+               regulator-name = "vcc3v3_sd";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+       };
+
+       vccio_sd: vccio-sd {
+               compatible = "regulator-gpio";
+               gpios = <&gpio0 RK_PA3 GPIO_ACTIVE_HIGH>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&sdmmc_volt>;
+               regulator-name = "vccio_sd";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <3300000>;
+               states = <3300000 1 1800000 0>;
+       };
+};
+
+&uart0 {
+       bootph-all;
+       pinctrl-names = "default";
+       pinctrl-0 = <&uart0m0_xfer>;
+};
+
+&fspi0 {
+       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 {
+                               reg = <0x00000000 0x00040000>;
+                               label = "env";
+                       };
+
+                       partition@40000 {
+                               reg = <0x00040000 0x00100000>;
+                               label = "idblock";
+                               read-only;
+                       };
+
+                       partition@140000 {
+                               reg = <0x00140000 0x00100000>;
+                               label = "uboot";
+                               read-only;
+                       };
+
+                       partition@240000 {
+                               reg = <0x00240000 0x00800000>;
+                               label = "boot";
+                       };
+
+                       partition@a40000 {
+                               reg = <0x00a40000 0x0f5c0000>;
+                               label = "ubi";
+                       };
+               };
+       };
+};
+
+&sdmmc0 {
+       bus-width = <4>;
+       cap-mmc-highspeed;
+       cap-sd-highspeed;
+       disable-wp;
+       no-sdio;
+       no-mmc;
+       sd-uhs-sdr104;
+       vmmc-supply = <&vcc3v3_sd>;
+       vqmmc-supply = <&vccio_sd>;
+       status = "disabled";
+};
+
+&sdmmc1 {
+       bus-width = <4>;
+       cap-sd-highspeed;
+       cap-sdio-irq;
+       keep-power-in-suspend;
+       mmc-pwrseq = <&sdio_pwrseq>;
+       no-sd;
+       no-mmc;
+       non-removable;
+       pinctrl-names = "default";
+       pinctrl-0 = <&sdmmc1_cmd &sdmmc1_clk &sdmmc1_bus4>;
+       status = "disabled";
+};
+
+&pinctrl {
+       sdio-pwrseq {
+               /omit-if-no-ref/
+               wifi_enable_h: wifi-enable-h {
+                       rockchip,pins = <2 RK_PB2 RK_FUNC_GPIO &pcfg_pull_none>;
+               };
+       };
+
+       sdmmc {
+               /omit-if-no-ref/
+               sdmmc_pwren: sdmmc-pwren {
+                       rockchip,pins = <0 RK_PA4 RK_FUNC_GPIO &pcfg_pull_none>;
+               };
+
+               /omit-if-no-ref/
+               sdmmc_volt: sdmmc-volt {
+                       rockchip,pins = <0 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>;
+               };
+       };
+
+       wireless-wlan {
+               /omit-if-no-ref/
+               wifi_host_wake_irq: wifi-host-wake-irq {
+                       rockchip,pins = <2 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
+               };
+       };
+};
diff --git a/arch/arm/mach-rockchip/rv1103b/Kconfig 
b/arch/arm/mach-rockchip/rv1103b/Kconfig
index 710a86aeb33..77699a5180e 100644
--- a/arch/arm/mach-rockchip/rv1103b/Kconfig
+++ b/arch/arm/mach-rockchip/rv1103b/Kconfig
@@ -1,5 +1,10 @@
 if ROCKCHIP_RV1103B
 
+config TARGET_OMEGA4_RV1103B
+       bool "OMEGA4_RV1103B"
+       help
+         Support Onion's Omega4 RV1103B board.
+
 config ROCKCHIP_BOOT_MODE_REG
        default 0x20160200
 
@@ -12,4 +17,6 @@ config SYS_SOC
 config SYS_MALLOC_F_LEN
        default 0x400
 
+source "board/onion/omega4_rv1103b/Kconfig"
+
 endif
diff --git a/board/onion/omega4_rv1103b/Kconfig 
b/board/onion/omega4_rv1103b/Kconfig
new file mode 100644
index 00000000000..43b126c20e9
--- /dev/null
+++ b/board/onion/omega4_rv1103b/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_OMEGA4_RV1103B
+
+config SYS_BOARD
+       default "omega4_rv1103b"
+
+config SYS_VENDOR
+       default "onion"
+
+config SYS_CONFIG_NAME
+       default "omega4_rv1103b"
+
+endif
diff --git a/board/onion/omega4_rv1103b/MAINTAINERS 
b/board/onion/omega4_rv1103b/MAINTAINERS
new file mode 100644
index 00000000000..5ad58118989
--- /dev/null
+++ b/board/onion/omega4_rv1103b/MAINTAINERS
@@ -0,0 +1,15 @@
+OMEGA4 RV1103B
+M:     Fabio Estevam <[email protected]>
+S:     Maintained
+F:     arch/arm/dts/rv1103b*
+F:     arch/arm/include/asm/arch-rv1103b/
+F:     arch/arm/include/asm/arch-rockchip/cru_rv1103b.h
+F:     arch/arm/mach-rockchip/rv1103b/
+F:     board/onion/omega4_rv1103b/
+F:     configs/omega4-rv1103b_defconfig
+F:     doc/board/onion/
+F:     drivers/clk/rockchip/clk_rv1103b.c
+F:     drivers/pinctrl/rockchip/pinctrl-rv1103b.c
+F:     include/configs/omega4_rv1103b.h
+F:     include/configs/rv1103b_common.h
+F:     include/dt-bindings/clock/rockchip,rv1103b-cru.h
diff --git a/board/onion/omega4_rv1103b/Makefile 
b/board/onion/omega4_rv1103b/Makefile
new file mode 100644
index 00000000000..afa0a7f7a93
--- /dev/null
+++ b/board/onion/omega4_rv1103b/Makefile
@@ -0,0 +1,7 @@
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+# Copyright 2026 Fabio Estevam <[email protected]>
+#
+
+obj-y  += omega4_rv1103b.o
diff --git a/board/onion/omega4_rv1103b/omega4_rv1103b.c 
b/board/onion/omega4_rv1103b/omega4_rv1103b.c
new file mode 100644
index 00000000000..9bdec3c396a
--- /dev/null
+++ b/board/onion/omega4_rv1103b/omega4_rv1103b.c
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright 2026 Fabio Estevam <[email protected]>
+
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+       gd->ram_size = SZ_256M;
+
+       return 0;
+}
+
+phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
+{
+       return gd->ram_top;
+}
diff --git a/board/onion/omega4_rv1103b/omega4_rv1103b.env 
b/board/onion/omega4_rv1103b/omega4_rv1103b.env
new file mode 100644
index 00000000000..7ed232cab91
--- /dev/null
+++ b/board/onion/omega4_rv1103b/omega4_rv1103b.env
@@ -0,0 +1,5 @@
+kernel_addr_r=0x00800000
+fdt_addr_r=0x02000000
+ramdisk_addr_r=0x04000000
+bootargs=console=ttyS0,115200 
mtdparts=spi1.0:256K(env),1M@256K(idblock),1M(uboot),8M(boot),-(ubi) ro 
rootwait ubi.mtd=ubi ubi.block=0,rootfs root=/dev/ubiblock0_0 
rootfstype=squashfs
+bootcmd=mtd read spi-nand0 0x04000000 0x240000 0x800000;imxtract 0x04000000 
kernel 0x00800000; imxtract 0x04000000 fdt 0x02000000; bootz 0x00800000 - 
0x02000000
diff --git a/configs/omega4-rv1103b_defconfig b/configs/omega4-rv1103b_defconfig
new file mode 100644
index 00000000000..04e51af605c
--- /dev/null
+++ b/configs/omega4-rv1103b_defconfig
@@ -0,0 +1,82 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=24000000
+CONFIG_SYS_ARCH_TIMER=y
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_TEXT_BASE=0x00200000
+CONFIG_SYS_MALLOC_F_LEN=0x80000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x00400000
+CONFIG_SF_DEFAULT_SPEED=24000000
+CONFIG_DEFAULT_DEVICE_TREE="rv1103b-omega4-evb"
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x100000
+CONFIG_ROCKCHIP_RV1103B=y
+CONFIG_SPL_ROCKCHIP_COMMON_BOARD=y
+CONFIG_ROCKCHIP_EXTERNAL_TPL=y
+CONFIG_SPL_SERIAL=y
+CONFIG_TARGET_OMEGA4_RV1103B=y
+CONFIG_SYS_BOOTM_LEN=0x04000000
+CONFIG_SYS_LOAD_ADDR=0x00008000
+CONFIG_SF_DEFAULT_BUS=1
+CONFIG_DEBUG_UART_BASE=0x20540000
+CONFIG_DEBUG_UART_CLOCK=24000000
+# CONFIG_DEBUG_UART_BOARD_INIT is not set
+CONFIG_SPL_SPI_FLASH_SUPPORT=y
+CONFIG_SPL_SPI=y
+CONFIG_DEBUG_UART=y
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_FIT_CIPHER=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_FIT_BEST_MATCH=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
+CONFIG_BOOTDELAY=1
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_SPL_NO_BSS_LIMIT=y
+CONFIG_SPL_MTD=y
+CONFIG_SPL_SPI_NAND_LOAD=y
+CONFIG_SYS_SPI_U_BOOT_OFFS=0x140000
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_MTD=y
+CONFIG_CMD_SPI=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_ENV_RELOC_GD_ENV_ADDR=y
+CONFIG_NO_NET=y
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_REGMAP=y
+CONFIG_SPL_REGMAP=y
+CONFIG_SYSCON=y
+CONFIG_SPL_SYSCON=y
+CONFIG_CLK=y
+CONFIG_SPL_CLK=y
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_SYS_I2C_ROCKCHIP=y
+# CONFIG_MMC is not set
+CONFIG_DM_MTD=y
+CONFIG_MTD_SPI_NAND=y
+CONFIG_SPI_FLASH_SFDP_SUPPORT=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_XTX=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_PINCTRL=y
+CONFIG_SPL_PINCTRL=y
+CONFIG_PINCTRL_ROCKCHIP_RV1103B=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550_MEM32=y
+CONFIG_ROCKCHIP_SFC=y
+CONFIG_SYSRESET=y
+# CONFIG_RSA is not set
+# CONFIG_SPL_SHA1 is not set
+# CONFIG_SPL_SHA256 is not set
+CONFIG_LZMA=y
+CONFIG_SPL_LZMA=y
+CONFIG_ERRNO_STR=y
diff --git a/doc/board/index.rst b/doc/board/index.rst
index 4103fef8d8f..2454c3598fb 100644
--- a/doc/board/index.rst
+++ b/doc/board/index.rst
@@ -46,6 +46,7 @@ Board-specific doc
    motorola/index
    nvidia/index
    nxp/index
+   onion/index
    openpiton/index
    ouya/index
    pegatron/index
diff --git a/doc/board/onion/index.rst b/doc/board/onion/index.rst
new file mode 100644
index 00000000000..2e106c8b773
--- /dev/null
+++ b/doc/board/onion/index.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Onion
+=====
+
+.. toctree::
+   :maxdepth: 2
+
+   omega4-rv1103b
diff --git a/doc/board/onion/omega4-rv1103b.rst 
b/doc/board/onion/omega4-rv1103b.rst
new file mode 100644
index 00000000000..41c64f40d6c
--- /dev/null
+++ b/doc/board/onion/omega4-rv1103b.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Onion Omega4 RV1103B board
+==========================
+
+U-Boot for the Onion Omega4 RV1103B board
+
+Quick Start
+-----------
+
+- Get the DDR initialization binary
+- Build U-Boot
+- Flash U-Boot into the SPI NAND
+
+Get the DDR initialization binary
+---------------------------------
+
+.. code-block:: bash
+
+   $ git clone https://github.com/rockchip-linux/rkbin.git
+
+The RV1103B DDR initialization is located at 
rkbin/bin/rv11/rv1103bb_ddr_924MHz_v1.05.bin
+
+Build U-Boot
+------------
+
+.. code-block:: bash
+
+   $ export CROSS_COMPILE=arm-linux-gnueabihf-
+   $ export ROCKCHIP_TPL=<path-to-rkbin>/bin/rv11/rv1103bb_ddr_924MHz_v1.05.bin
+   $ make omega4-rv1103b_defconfig
+   $ make
+
+The idbloader-spi.img and u-boot.img are the binaries that need to be flashed
+into the SPI NAND.
+
+Flash U-Boot into the SPI NAND
+------------------------------
+
+Connect the USB OTG and UART console cables from the Omega4 board to
+the host PC.
+
+Press the BOOT button while applying power to the board.
+
+The string "RKUART" should appear on the console (115200,8N1).
+
+Install the rkdeveloptool from https://github.com/rockchip-linux/rkdeveloptool
+by following the instruction in the README file.
+
+.. code-block:: bash
+
+   $ sudo ./rkdeveloptool db download.bin
+   $ sudo ./rkdeveloptool wl 0x200 idbloader.img
+   $ sudo ./rkdeveloptool wl 0xa00 u-boot.img
+
+Power cycle the board and U-Boot output is seen on the console.
diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
index a31ee7100b9..2574a1da52c 100644
--- a/doc/board/rockchip/rockchip.rst
+++ b/doc/board/rockchip/rockchip.rst
@@ -180,6 +180,9 @@ List of mainline supported Rockchip boards:
      - Yanyi Tech CoolPi CM5 EVB (coolpi-cm5-evb-rk3588)
      - Yanyi Tech CoolPi CM5 GenBook (coolpi-cm5-genbook-rk3588)
 
+* rv1103b
+     - Onion Omega4 (omega4-rv1103b), see :doc:`../onion/omega4-rv1103b`
+
 * rv1108
      - Rockchip Evb-rv1108 (evb-rv1108)
      - Elgin-R1 (elgin-rv1108)
diff --git a/include/configs/omega4_rv1103b.h b/include/configs/omega4_rv1103b.h
new file mode 100644
index 00000000000..8430b0b4d09
--- /dev/null
+++ b/include/configs/omega4_rv1103b.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2016 Rockchip Electronics Co., Ltd
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#include <configs/rv1103b_common.h>
+
+#endif
-- 
2.43.0

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