configs/ti_tda4vm_sk: new defconfig

Add support to Texas Instruments j721e starter kit, also called
TDA4VM-SK.

https://www.ti.com/tool/SK-TDA4VM

Signed-off-by: Sofiane HAMAM <sofiane.hamam@smile.fr>
Tested-by: Sofiane HAMAM <sofiane.hamam@smile.fr>
Reviewed-by: Romain Naour <romain.naour@smile.fr>
[Julien:
 - reword commit log title
 - regenerate defconfig with "make savedefconfig"
 - fix typo in readme.txt
]
Signed-off-by: Julien Olivain <ju.o@free.fr>

board/ti/tda4vm-sk/extlinux.conf

@@ -0,0 +1,5 @@
+default buildroot
+label buildroot
+   kernel /Image
+   devicetreedir /
+append root=/dev/mmcblk1p2 rootwait rw console=ttyS2,115200n8

board/ti/tda4vm-sk/genimage.cfg

@@ -0,0 +1,33 @@
+image boot.vfat {
+	vfat {
+		files = {
+			"sysfw.itb",
+			"tiboot3.bin",
+			"tispl.bin",
+			"u-boot.img",
+			"Image",
+			"ti",
+			"extlinux",
+		}
+
+		label = "boot"
+	}
+
+	size = 64M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition u-boot {
+		partition-type = 0xC
+		bootable = "true"
+		image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+	}
+}

board/ti/tda4vm-sk/patches/linux/linux.hash

@@ -0,0 +1,2 @@
+# From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
+sha256  4f21c01f4d04c1d1b3ed794153f8900802c92497be620b07c4869530f2d28ee3  linux-6.18.16.tar.xz

board/ti/tda4vm-sk/patches/ti-k3-r5-loader/ti-k3-r5-loader.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256  b60d5865cefdbc75da8da4156c56c458e00de75a49b80c1a2e58a96e30ad0d54  u-boot-2026.01.tar.bz2

board/ti/tda4vm-sk/patches/uboot/uboot.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256  b60d5865cefdbc75da8da4156c56c458e00de75a49b80c1a2e58a96e30ad0d54  u-boot-2026.01.tar.bz2

board/ti/tda4vm-sk/post-build.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+BOARD_DIR="$(dirname "$0")"
+
+install -m 0644 -D "$BOARD_DIR"/extlinux.conf "$BINARIES_DIR"/extlinux/extlinux.conf

board/ti/tda4vm-sk/readme.txt

@@ -0,0 +1,36 @@
+Texas Instruments SK-TDA4VM Test and Development Board
+
+Description
+===========
+
+This configuration will build a complete image for the TI SK-TDA4VM
+board: https://www.ti.com/tool/SK-TDA4VM
+
+How to Build
+============
+
+Select the default configuration for the target:
+
+$ make ti_tda4vm_sk_defconfig
+
+Optional: modify the configuration:
+
+$ make menuconfig
+
+Build:
+
+$ make
+
+To copy the resultimg output image file to an SD card use dd:
+
+$ dd if=output/images/sdcard.img of=/dev/sdX bs=1M
+
+How to Run
+==========
+
+Insert the SD card into the SK-TDA4VM board, and power it up through the
+USB Type-C connector. The system should come up. You can use a
+micro-USB cable to connect to the connector labeled UART to
+communicate with the board.
+
+User's guide : https://www.ti.com/lit/ug/spruj21e/spruj21e.pdf