rock-5a: add

The Radxa ROCK 5 Model A is an SBC in roughly a RaspberryPi-ish form factor
packed with a wide range of class-leading functionality, features and
expansion options. The ROCK 5A board comes in several LPDDR4x RAM memory
options: 4GB, 8GB, 16GB, and 32GB.

It uses the Rockchip RK3588S SoC (quad A76 @ 2.2GHz + quad A55 @ 1.8GHz,
Mali G610mp4 GPU), has both 8k and 4k HDMI, Gb ethernet with PoE support,
USB2/3, M.2 E Key (NVMe or SATA), a 40-pin RaspberryPi-ish 3V3 GPIO header,
USB Type-C power, MIPI DSI/CSI, SDcard slot, optional eMMC, and more.

https://wiki.radxa.com/Rock5/5b
https://radxa.com/products/rock5/5a/

[
with the following tweaks by Trevor:
- switch to information URL to one that points to information in english
- improved the commit message
- add rock-5a to README
]

Signed-off-by: Stephen Chen <stephen@radxa.com>
Signed-off-by: Trevor Woerner <twoerner@gmail.com>

README

@@ -34,6 +34,7 @@ Status of supported boards:
 		nanopi-r2s
 		nanopi-m4b
 		rock-pi-s
+		rock-5a
 	builds:
 		marsboard-rk3066
 		radxarock

conf/machine/rock-5a.conf

@@ -0,0 +1,12 @@
+#@TYPE: Machine
+#@NAME: Radxa Rock 5A
+#@DESCRIPTION: ROCK5 is the 5th generation of SBC designed by Radxa.
+#https://docs.radxa.com/en/rock5/rock5a
+
+require conf/machine/include/rk3588s.inc
+
+PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-dev"
+KERNEL_DEVICETREE = "rockchip/rk3588s-rock-5a.dtb"
+MACHINE_EXTRA_RRECOMMENDS += "kernel-modules"
+
+UBOOT_MACHINE = "rock5a-rk3588s_defconfig"

recipes-kernel/linux/linux-yocto-dev.bbappend

@@ -1,3 +1,5 @@
 FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
+COMPATIBLE_MACHINE:rock-5a = "rock-5a"
 COMPATIBLE_MACHINE:rock-5b = "rock-5b"
+SRC_URI:append:rock-5a = " file://rockchip-kmeta;type=kmeta;name=rockchip-kmeta;destsuffix=rockchip-kmeta"
 SRC_URI:append:rock-5b = " file://rockchip-kmeta;type=kmeta;name=rockchip-kmeta;destsuffix=rockchip-kmeta"