[Buildroot] [PATCH 1/1] board/visionfive2: add spi-nor image

[Lukasz Tekieli]

Builds the spi-nor.img together with the sdcard.img.
Readme is extended with SPI NOR flash writing instructions
and recovery.

The spi-nor.img layout is based on the following document:

https://doc-en.rvspace.org/VisionFive2/Boot_UG/JH7110_SDK/boot_address_allocation.html

Signed-off-by: Lukasz Tekieli <tekieli.lukasz at gmail.com>
---
 board/visionfive2/genimage_spi-nor.cfg | 36 ++++++++++++++++++++++++++
 board/visionfive2/post-image.sh        |  4 +++
 board/visionfive2/readme.txt           | 25 +++++++++++++++---
 configs/visionfive2_defconfig          |  3 +--
 4 files changed, 62 insertions(+), 6 deletions(-)
 create mode 100644 board/visionfive2/genimage_spi-nor.cfg
 create mode 100755 board/visionfive2/post-image.sh

diff --git a/board/visionfive2/genimage_spi-nor.cfg b/board/visionfive2/genimage_spi-nor.cfg
new file mode 100644
index 0000000000..8b1d13989a
--- /dev/null
+++ b/board/visionfive2/genimage_spi-nor.cfg
@@ -0,0 +1,36 @@
+flash nor-16M-256 {
+	pebsize = 4K
+	minimum-io-unit-size = 256
+	numpebs = 4096
+}
+
+image spi-nor.img {
+	size = 16M
+
+	flash {
+	}
+
+	flashtype = "nor-16M-256"
+
+	partition spl {
+		image = "u-boot-spl.bin.normal.out"
+		offset = 0K
+		size = 512K
+	}
+
+	partition uboot-env {
+		offset = 960K
+		size = 64K
+	}
+
+	partition uboot {
+		image = "u-boot.itb"
+		offset = 1M
+		size = 4M
+	}
+
+	partition reserved-data {
+		offset = 6M
+		size = 10M
+	}
+}
diff --git a/board/visionfive2/post-image.sh b/board/visionfive2/post-image.sh
new file mode 100755
index 0000000000..3da106dc26
--- /dev/null
+++ b/board/visionfive2/post-image.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+support/scripts/genimage.sh -c board/visionfive2/genimage.cfg
+support/scripts/genimage.sh -c board/visionfive2/genimage_spi-nor.cfg
diff --git a/board/visionfive2/readme.txt b/board/visionfive2/readme.txt
index 85be1d5dfc..31edef02e4 100644
--- a/board/visionfive2/readme.txt
+++ b/board/visionfive2/readme.txt
@@ -12,12 +12,27 @@ How to build
 $ make visionfive2_defconfig
 $ make
 
+Once the build process is finished you will have two images
+in the output/images/ directory:
+- sdcard.img
+- spi-nor.img
+
+How to write the SPI NOR flash
+=============================
+
+If you have a booting device use u-boot and tftp:
+
+  # tftpboot 0x82000000 spi-nor.img
+  # sf probe
+  # sf update 0x82000000 0x0 {filesize}
+
+Otherwise, follow the recovery instruction:
+
+https://doc-en.rvspace.org/VisionFive2/Quick_Start_Guide/VisionFive2_SDK_QSG/recovering_bootloader%20-%20vf2.html
+
 How to write the SD card
 ========================
 
-Once the build process is finished you will have an image called "sdcard.img"
-in the output/images/ directory.
-
 Copy the bootable "sdcard.img" onto an SD card with "dd":
 
   $ sudo dd if=output/images/sdcard.img of=/dev/sdX
@@ -27,7 +42,9 @@ Preparing the board
 
 Connect a TTL UART cable to pin 6 (GND), 8 (TX) and 10 (RX).
 
-Change the boot mode pins to SD card booting (RGPIO_0=1, GRPIO_1=0):
+Use the correct mode for booting:
+- SD card RGPIO_0=1, GRPIO_1=0
+- SPI NOR flash RGPIO_0=1, GRPIO_1=1
 
 https://doc-en.rvspace.org/VisionFive2/Quick_Start_Guide/VisionFive2_SDK_QSG/boot_mode_settings.html
 
diff --git a/configs/visionfive2_defconfig b/configs/visionfive2_defconfig
index c8576a35a7..699ea8dd4b 100644
--- a/configs/visionfive2_defconfig
+++ b/configs/visionfive2_defconfig
@@ -2,8 +2,7 @@ BR2_riscv=y
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
 BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_OVERLAY="board/visionfive2/overlay"
-BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
-BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/visionfive2/genimage.cfg"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/visionfive2/post-image.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,starfive-tech,linux,05533e9c31d6f0da20efc2d436a3b0f6d516ed4b)/linux-05533e9c31d6f0da20efc2d436a3b0f6d516ed4b.tar.gz"
-- 
2.40.1