diff --git a/README b/README
index c2697d1..8192284 100644
--- a/README
+++ b/README
@@ -39,6 +39,7 @@ Status of supported boards:
 			roc-rk3328-cc
 			roc
k-3a
 			rock-4c-plus
+			rock-4d
 			rock-5a
 			rock-5b
 			rock-pi-4a
@@ -122,6 +123,22 @@ Notes:
 
 	in the configuration (e.g. conf/local.conf).
 
+  rk3576 booting:
+	The RK3576 boot ROM cannot load the bootloader from the SD card.
+	For rk3576-based boards (e.g. the rock-4d) the bootloader must be
+	extracted from the wic image and flashed to the SPI flash; the
+	kernel and rootfs then boot from the SD card.
+
+	To extract the SPI bootloader region (first 16 MiB) from a wic
+	image:
+
+		dd if=<image>.wic of=spi.bin bs=1M count=16
+
+	Then flash spi.bin to the SPI flash, e.g. with rkdeveloptool
+	from a host PC with the board in Maskrom mode; see the board
+	vendor's documentation for details:
+		https://docs.radxa.com/en/rock4/rock4d/low-level-dev/spi_flash
+
   A/B updates with RAUC
 	This layer now contains one example of building an A/B update using RAUC.
 	Users are free to use/test this example, to optionally enable it, to build
diff --git a/co
nf/machine/rock-4d.conf b/conf/machine/rock-4d.conf
new file mode 100644
index 0000000..c32e4f9
--- /dev/null
+++ b/conf/machine/rock-4d.conf
@@ -0,0 +1,11 @@
+#@TYPE: Machine
+#@NAME: Radxa Rock 4D
+#@DESCRIPTION: ROCK4D is the latest SBC of serie 4 based on the RK3576 SoC
+#https://radxa.com/products/rock4/4d
+
+require conf/machine/include/rk3576.inc
+
+KERNEL_DEVICETREE = "rockchip/rk3576-rock-4d.dtb"
+MACHINE_EXTRA_RRECOMMENDS += "kernel-modules"
+
+UBOOT_MACHINE = "rock-4d-rk3576_defconfig"
diff --git a/recipes-kernel/linux/linux-rockchip.inc b/recipes-kernel/linux/linux-rockchip.inc
index 6c62e84..f666283 100644
--- a/recipes-kernel/linux/linux-rockchip.inc
+++ b/recipes-kernel/linux/linux-rockchip.inc
@@ -23,6 +23,7 @@ COMPATIBLE_MACHINE:roc-rk3308-cc = "roc-rk3308-cc"
 COMPATIBLE_MACHINE:roc-rk3328-cc = "roc-rk3328-cc"
 COMPATIBLE_MACHINE:rock-3a = "rock-3a"
 COMPATIBLE_MACHINE:rock-4c-plus = "rock-4c-plus"
+COMPATIBLE_MACHINE:rock-4d = "rock-4d"
 COM
PATIBLE_MACHINE:rock-5a = "rock-5a"
 COMPATIBLE_MACHINE:rock-5b = "rock-5b"