configs/lafrite: new defconfig

Add basic support for the Libre Computer "La Frite" SBC.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/librecomputer/lafrite/genimage.cfg

@@ -0,0 +1,10 @@
+image usb.img {
+	hdimage {
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+		size = 512M
+	}
+}

board/librecomputer/lafrite/overlay/extlinux/extlinux.conf

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+label linux
+  kernel /boot/Image
+  devicetree /boot/meson-gxl-s805x-libretech-ac.dtb
+  append console=ttyAML0,115200 earlyprintk root=/dev/sda1 rootwait

board/librecomputer/lafrite/readme.txt

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+Intro
+=====
+
+Libre Computer "La Frite" is a low cost SBC based around an Amlogic
+s805x SoC (quad A53), 512MB/1GB DDR4 and a 16MB SPI NOR flash:
+
+https://libre.computer/products/boards/aml-s805x-ac/
+
+How to build it
+===============
+
+Configure Buildroot:
+
+    $ make lafrite_defconfig
+
+Compile everything and build the USB flash drive image:
+
+    $ make
+
+How to write the USB flash drive image
+======================================
+
+Once the build process is finished you will have an image called "usb.img"
+in the output/images/ directory.
+
+Copy the bootable "usb.img" onto a USB flash drive with "dd":
+
+  $ sudo dd if=output/images/usb.img of=/dev/sdX
+
+How to boot
+===========
+
+Insert flash drive to the USB connector furthest away from the IR
+receiver and power up board. The system will boot automatically.