diff options
| author | Kaustabh Chakraborty <[email protected]> | 2026-02-03 18:38:49 +0530 |
|---|---|---|
| committer | Minkyu Kang <[email protected]> | 2026-02-23 15:35:33 +0900 |
| commit | 11198fa347390eb449c2a0939f5f00cf510fe285 (patch) | |
| tree | f2e297a328f7846dc24f6d3ad7e9cd9919cfb576 /doc | |
| parent | d73efc6841c892c8dd06711aac97ac3de503bda8 (diff) | |
doc: board: samsung: exynos-mobile: remove requirement of stub device tree
Flashing U-Boot for Exynos 7870 requires creating a stub device tree,
where certain properties and nodes are defined which are populated by
the previous bootloader in the phones.
Since these properties are now available in the U-Boot device tree, it's
now possible to use the same blob generated by U-Boot in place of the
stub, when creating boot images. Update the build documentation to
reflect the same.
Signed-off-by: Kaustabh Chakraborty <[email protected]>
Signed-off-by: Minkyu Kang <[email protected]>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/board/samsung/exynos-mobile/exynos7870.rst | 40 |
1 files changed, 3 insertions, 37 deletions
diff --git a/doc/board/samsung/exynos-mobile/exynos7870.rst b/doc/board/samsung/exynos-mobile/exynos7870.rst index 37562e272b4..702b21244eb 100644 --- a/doc/board/samsung/exynos-mobile/exynos7870.rst +++ b/doc/board/samsung/exynos-mobile/exynos7870.rst @@ -6,47 +6,13 @@ Samsung Exynos 7870 Boards Preparation ----------- -Create the following device tree (named ``stub.dts``) -.. code-block:: devicetree - - /dts-v1/; - - / { - compatible = "samsung,exynos7870"; - #address-cells = <2>; - #size-cells = <1>; - - model_info-chip = <7870>; - model_info-hw_rev = <0>; - model_info-hw_rev_end = <255>; - - chosen { - }; - - memory@80000000 { - device_type = "memory"; - reg = <0x0 0x80000000 0x0>; - }; - - memory@100000000 { - device_type = "memory"; - reg = <0x1 0x00000000 0x0>; - }; - }; - -The chosen node and memory ranges are populated by S-BOOT. A certain device -model may have multiple variants, with differing amounts of RAM and storage. The -RAM capacity information is graciously provided by S-BOOT's device tree -overlays. - -Compile it to a device tree blob, then pack it in the QCDT format [1]_ using -``dtbTool-exynos`` [2]_ by issuing the following commands: +Pack the device tree blob in the QCDT format [1]_ using ``dtbTool-exynos`` [2]_ +by issuing the following commands: .. prompt:: bash $ - dtc -I dts -O dtb -o stub.dtb stub.dts - dtbTool-exynos -o stub-dt.img stub.dtb + dtbTool-exynos -o stub-dt.img .output/u-boot.dtb Finally, use ``mkbootimg`` by osm0sis [3]_ to generate the boot image: |