$ git clone https://github.com/linux4microchip/dt-overlay-mchp.git Cloning into 'dt-overlay-mchp'... remote: Enumerating objects: 1585, done. remote: Counting objects: 100% (465/465), done. remote: Compressing objects: 100% (180/180), done. remote: Total 1585 (delta 282), reused 441 (delta 274), pack-reused 1120 Receiving objects: 100% (1585/1585), 539.04 KiB | 4.08 MiB/s, done. Resolving deltas: 100% (879/879), done. $ cd dt-overlay-mchp/
ARCH
and CROSS_COMPILE
are set correctly
KERNEL_DIR
points to Linux kernel and the kernel was already built for the board. This is needed because the DT Overlay repository uses the Device Tree Compiler (dtc
) from the kernel source tree. By default, KERNEL_DIR
is set to a linux
directory that would be under the parent directory in the directory tree: ../linux
KERNEL_BUILD_DIR
that points to where the Linux kernel binary and Device Tree blob, resulting of your compilation of the kernel, are located. By default, KERNEL_BUILD_DIR
is set to the same directory as KERNEL_DIR
. It shouldn't be changed if you have the habit of compiling your kernel within the Linux source tree
$ make sam9x75_curiosity_dtbosTo build the FIT image with overlays for a board make sure the following steps are done:
ARCH
and CROSS_COMPILE
are set correctly
KERNEL_DIR
points to Linux kernel and the kernel was already built for the board. This is needed because the DT Overlay repository uses the Device Tree Compiler (dtc
) from the kernel source tree. By default, KERNEL_DIR
is set to a linux
directory that would be under the parent directory in the directory tree: ../linux
KERNEL_BUILD_DIR
that points to where the Linux kernel binary and Device Tree blob, resulting of your compilation of the kernel, are located. By default, KERNEL_BUILD_DIR
is set to the same directory as KERNEL_DIR
. It shouldn't be changed if you have the habit of compiling your kernel within the Linux source tree.
mkimage
is installed on the development machine
PATH
environment variable
$ make sam9x75_curiosity.itb .... FIT description: Microchip SAM9X75-Curiosity FIT Image Created: Thu May 16 15:14:43 2024 Image 0 (kernel) Description: Linux4SAM Linux kernel Created: Thu May 16 15:14:43 2024 Type: Kernel Image Compression: uncompressed Data Size: 5221704 Bytes = 5099.32 KiB = 4.98 MiB Architecture: ARM OS: Linux Load Address: 0x22000000 Entry Point: 0x22000000 Hash algo: crc32 Hash value: 9778d68b Hash algo: sha1 Hash value: 1c5dc50a13f1b6d18787ebdbbbcde67b069f10e3 Image 1 (base_fdt) Description: SAM9X75-Curiosity Flattened Device Tree blob Created: Thu May 16 15:14:43 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 28755 Bytes = 28.08 KiB = 0.03 MiB Architecture: ARM Load Address: 0x23000000 Hash algo: crc32 Hash value: d35678b4 Hash algo: sha1 Hash value: 2598efa5e36ccc3defdae2c0de86f416c9c088f7 Image 2 (fdt_isc_imx219) Description: Device Tree blob ISC IMX219 overlay Created: Thu May 16 15:14:43 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 4126 Bytes = 4.03 KiB = 0.00 MiB Architecture: ARM Load Address: 0x23100000 Hash algo: crc32 Hash value: d8fd34cf Hash algo: sha1 Hash value: 75ff92b00dc8d9466fe07789822127ee5d225640 Image 3 (fdt_lvds_panel) Description: Device Tree blob for AC69T88A LVDS Display Panel Created: Thu May 16 15:14:43 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 3946 Bytes = 3.85 KiB = 0.00 MiB Architecture: ARM Load Address: 0x23110000 Hash algo: crc32 Hash value: f2aca13d Hash algo: sha1 Hash value: cceb96efe1621f3ad6427d6cdf8f4e2702aacb00 Image 4 (fdt_gmac_lan8840) Description: Device Tree blob for LAN8840 RGMII PHY overlay Created: Thu May 16 15:14:43 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 2168 Bytes = 2.12 KiB = 0.00 MiB Architecture: ARM Load Address: 0x23120000 Hash algo: crc32 Hash value: 44e2f96d Hash algo: sha1 Hash value: 8879cb8f80cc87d5ed53af5bae11a4cc9f1ddc41 Image 5 (fdt_i2s_proto) Description: Device Tree blob PROTO Audio board overlay Created: Thu May 16 15:14:43 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 1666 Bytes = 1.63 KiB = 0.00 MiB Architecture: ARM Load Address: 0x23130000 Hash algo: crc32 Hash value: df39dc8b Hash algo: sha1 Hash value: 1c7c335aad79d82d3482b3d9da7fbbcd4bf98ee4 Default Configuration: 'kernel_dtb' Configuration 0 (kernel_dtb) Description: Linux kernel and base FDT blob for SAM9X75-Curiosity board Kernel: kernel FDT: base_fdt Configuration 1 (base_dtb) Description: Base FDT blob for SAM9X75-Curiosity board Kernel: unavailable FDT: base_fdt Configuration 2 (imx219) Description: FDT overlay blob for ISC IMX219 sensor Kernel: unavailable FDT: fdt_isc_imx219 Configuration 3 (lvds) Description: FDT overlay blob for AC69T88A LVDS Display Panel Kernel: unavailable FDT: fdt_lvds_panel Configuration 4 (lan8840) Description: FDT overlay blob for LAN8840 RGMII PHY Daughter Card Kernel: unavailable FDT: fdt_gmac_lan8840 Configuration 5 (i2s_proto) Description: FDT overlay blob for I2S PROTO audio board Kernel: unavailable FDT: fdt_i2s_protoThe following example shows how to build a FIT image for SAM9X60 Curiosity board using the
KERNEL_DIR
and KERNEL_BUILD_DIR
environment variables that are handled by the dt-overlay-mchp
Makefile
. This allows you to precisely specify where the kernel source tree is and where the resulting of your compilation of this kernel is located. It allows the Makefile
to find the Device Tree Compiler (dtc
), the kernel image (zImage
) and the device tree for the board (.dtb
). This brings a lot of flexibility to the process of creating a FIT image.ARCH
and CROSS_COMPILE
are set to their adapted values on this example system. CROSS_COMPILE variable in particular must be adapted to your own development host.
$ KERNEL_DIR=/<path_to_kernel_sources> KERNEL_BUILD_DIR=/<path_to_kernel_build_dir> make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- sam9x60_curiosity.itb .... mkimage -D "-i../linux/arch/arm/boot/ -i../linux/arch/arm/boot/dts -i../linux/arch/arm/boot/dts/microchip -p 1000 -@ -Wno-unit_address_vs_reg -Wno-graph_child_address -Wno-pwms_property" -f sam9x60_curiosity.its sam9x60_curiosity.itb FIT description: Microchip SAM9X60-Curiosity FIT Image Created: Thu May 16 15:16:13 2024 Image 0 (kernel) Description: Linux4SAM Linux kernel Created: Thu May 16 15:16:13 2024 Type: Kernel Image Compression: uncompressed Data Size: 5221704 Bytes = 5099.32 KiB = 4.98 MiB Architecture: ARM OS: Linux Load Address: 0x22000000 Entry Point: 0x22000000 Hash algo: crc32 Hash value: 9778d68b Hash algo: sha1 Hash value: 1c5dc50a13f1b6d18787ebdbbbcde67b069f10e3 Image 1 (base_fdt) Description: SAM9X60-Curiosity Flattened Device Tree blob Created: Thu May 16 15:16:13 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 36432 Bytes = 35.58 KiB = 0.03 MiB Architecture: ARM Load Address: 0x23000000 Hash algo: crc32 Hash value: a4558e6d Hash algo: sha1 Hash value: b31d0eb8b22d9bc32c1751c8d9c01689d4ea0757 Image 2 (fdt_pda5) Description: Device Tree blob pda5000 overlay Created: Thu May 16 15:16:13 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 4772 Bytes = 4.66 KiB = 0.00 MiB Architecture: ARM Load Address: 0x23100000 Hash algo: crc32 Hash value: 9b565bfe Hash algo: sha1 Hash value: c425668b2bc897fa83e867a0dea13547bb393a96 Image 3 (fdt_wilc3000) Description: Device Tree blob WILC3000 overlay Created: Thu May 16 15:16:13 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 1534 Bytes = 1.50 KiB = 0.00 MiB Architecture: ARM Load Address: 0x23110000 Hash algo: crc32 Hash value: 8294b75c Hash algo: sha1 Hash value: 86494722c92f978610dbbc96cc5a07a3804cf6bf Default Configuration: 'kernel_dtb' Configuration 0 (kernel_dtb) Description: Linux kernel and base FDT blob for SAM9X60-Curiosity board Kernel: kernel FDT: base_fdt Configuration 1 (base_dtb) Description: Base FDT blob for SAM9X60-Curiosity board Kernel: unavailable FDT: base_fdt Configuration 2 (pda5) Description: FDT overlay blob for PDA TM5000 screen Kernel: unavailable FDT: fdt_pda5 Configuration 3 (wilc) Description: FDT overlay blob for WILC3000 Kernel: unavailable FDT: fdt_wilc3000
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