diff --git a/arch/arm/dts/rk3568-rock-3b-u-boot.dtsi b/arch/arm/dts/rk3568-rock-3b-u-boot.dtsi
new file mode 100644
index 0000000..b1f3242
--- /dev/null
+++ b/arch/arm/dts/rk3568-rock-3b-u-boot.dtsi
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk356x-u-boot.dtsi"
+
+&sdhci {
+	mmc-hs400-1_8v;
+	mmc-hs400-enhanced-strobe;
+};
+
+&sfc {
+	flash@0 {
+		bootph-pre-ram;
+		bootph-some-ram;
+	};
+};
diff --git a/board/rockchip/evb_rk3568/MAINTAINERS b/board/rockchip/evb_rk3568/MAINTAINERS
index ba4884d..588134e 100644
--- a/board/rockchip/evb_rk3568/MAINTAINERS
+++ b/board/rockchip/evb_rk3568/MAINTAINERS
@@ -70,6 +70,12 @@
 F:	arch/arm/dts/rk3568-rock-3a.dts
 F:	arch/arm/dts/rk3568-rock-3a-u-boot.dtsi
 
+ROCK-3B
+M:	Jonas Karlman <jonas@kwiboo.se>
+S:	Maintained
+F:	configs/rock-3b-rk3568_defconfig
+F:	arch/arm/dts/rk3568-rock-3b*
+
 ROCK-3C
 M:	Jonas Karlman <jonas@kwiboo.se>
 M:	Maxim Moskalets <maximmosk4@gmail.com>
diff --git a/configs/rock-3b-rk3568_defconfig b/configs/rock-3b-rk3568_defconfig
new file mode 100644
index 0000000..9377968
--- /dev/null
+++ b/configs/rock-3b-rk3568_defconfig
@@ -0,0 +1,100 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=24000000
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_SF_DEFAULT_SPEED=24000000
+CONFIG_SF_DEFAULT_MODE=0x2000
+CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3568-rock-3b"
+CONFIG_ROCKCHIP_RK3568=y
+CONFIG_ROCKCHIP_SPI_IMAGE=y
+CONFIG_SPL_SERIAL=y
+CONFIG_DEBUG_UART_BASE=0xFE660000
+CONFIG_DEBUG_UART_CLOCK=24000000
+CONFIG_SPL_SPI_FLASH_SUPPORT=y
+CONFIG_SPL_SPI=y
+CONFIG_SYS_LOAD_ADDR=0xc00800
+CONFIG_PCI=y
+CONFIG_DEBUG_UART=y
+CONFIG_AHCI=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_SPL_FIT_SIGNATURE=y
+CONFIG_SPL_LOAD_FIT=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
+CONFIG_DEFAULT_FDT_FILE="rockchip/rk3568-rock-3b.dtb"
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_SPL_MAX_SIZE=0x40000
+CONFIG_SPL_PAD_TO=0x7f8000
+# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
+CONFIG_SPL_SPI_LOAD=y
+CONFIG_SYS_SPI_U_BOOT_OFFS=0x60000
+CONFIG_SPL_ATF=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_PCI=y
+CONFIG_CMD_POWEROFF=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_ROCKUSB=y
+CONFIG_CMD_USB_MASS_STORAGE=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_PMIC=y
+CONFIG_CMD_REGULATOR=y
+# CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_LIVE=y
+CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_SPL_REGMAP=y
+CONFIG_SPL_SYSCON=y
+CONFIG_SCSI_AHCI=y
+CONFIG_AHCI_PCI=y
+CONFIG_SPL_CLK=y
+# CONFIG_USB_FUNCTION_FASTBOOT is not set
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_MISC=y
+CONFIG_SUPPORT_EMMC_RPMB=y
+CONFIG_MMC_DW=y
+CONFIG_MMC_DW_ROCKCHIP=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_SDMA=y
+CONFIG_MMC_SDHCI_ROCKCHIP=y
+CONFIG_SF_DEFAULT_BUS=4
+CONFIG_SPI_FLASH_SFDP_SUPPORT=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_XTX=y
+CONFIG_PHY_REALTEK=y
+CONFIG_DWC_ETH_QOS=y
+CONFIG_DWC_ETH_QOS_ROCKCHIP=y
+CONFIG_NVME_PCI=y
+CONFIG_PCIE_DW_ROCKCHIP=y
+CONFIG_PHY_ROCKCHIP_INNO_USB2=y
+CONFIG_PHY_ROCKCHIP_NANENG_COMBOPHY=y
+CONFIG_SPL_PINCTRL=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_PMIC_FAN53555=y
+CONFIG_PMIC_RK8XX=y
+CONFIG_REGULATOR_RK8XX=y
+CONFIG_SPL_RAM=y
+CONFIG_SCSI=y
+CONFIG_BAUDRATE=1500000
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550_MEM32=y
+CONFIG_ROCKCHIP_SFC=y
+CONFIG_SYSRESET=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_DWC3=y
+CONFIG_USB_DWC3_GENERIC=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_USB_FUNCTION_ROCKUSB=y
+CONFIG_ERRNO_STR=y
diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
index a78d6db..7115cfb 100644
--- a/doc/board/rockchip/rockchip.rst
+++ b/doc/board/rockchip/rockchip.rst
@@ -117,7 +117,8 @@
      - Generic RK3566/RK3568 (generic-rk3568)
      - Hardkernel ODROID-M1 (odroid-m1-rk3568)
      - Radxa E25 Carrier Board (radxa-e25-rk3568)
-     - Radxa ROCK 3 Model A (rock-3a-rk3568)
+     - Radxa ROCK 3A (rock-3a-rk3568)
+     - Radxa ROCK 3B (rock-3b-rk3568)
 
 * rk3588
      - ArmSoM Sige7 (sige7-rk3588)