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-rw-r--r--bsp/meta-altera/README.md33
1 files changed, 29 insertions, 4 deletions
diff --git a/bsp/meta-altera/README.md b/bsp/meta-altera/README.md
index cea1dbf6..532333bc 100644
--- a/bsp/meta-altera/README.md
+++ b/bsp/meta-altera/README.md
@@ -4,6 +4,18 @@ This layer works with poky and Angstrom
Please follow the recommended setup procedures of your OE distribution.
+Supported u-boot and linux kernels
+===
+It is important to understand the support and release of u-boot-socfpga
+and linux-socfpga in the github.com/altera-opensource repositories. Only
+currently supported and maintained releases/branches are available in the
+repository. As such, supported kernel and u-boot releases are updated regularly
+in currently supported meta-altera branches. Kernel and u-boot releases
+which are no longer supported are removed.
+
+Supported branches
+==================
+Only branches listed appropriately in https://wiki.yoctoproject.org/wiki/Stable_branch_maintenance are maintained.
Choosing Kernel Versions
==========================
@@ -25,6 +37,21 @@ or for the linux-altera-ltsi kernel
Please note that older kernels will not compile with GCC 5+ and you will need
to specify in your conf/local.conf to revert to older 4.9 toolchain.
+Specifying Devicetrees and U-Boot Configurations
+==================================================
+All of the supported machines select default uboot configurations and devicetrees. These
+selections can be overridden in the local.conf or by defining your own machine in your
+own layer.
+
+An example of the is the DE0-Nano-SoC board, which is a supported configuration in the Cyclone5
+machine definition.
+
+ UBOOT_CONFIG = "de0-nano-soc"
+ UBOOT_EXTLINUX_FDT_default = "../socfpga_cyclone5_de0_nano_soc.dtb"
+
+The above overrides the uboot configuration, "de0-nano-soc" is a target in u-boot, and configures
+distroboot to indicate the de0-nano-soc devicetree. Please keep in mind that not all targets are
+using distroboot in u-boot and may require u-boot environment changes.
Choosing Toolchain Versions
=============================
@@ -48,8 +75,6 @@ For Angstrom:
-Send pull requests, patches, comments or questions to yvanderv@opensource.altera.com
-and raj.khem@gmail.com
+Submit patches via github pull requests, Use github issues to report problems or to send comments
-Maintainers: Khem Raj <raj.khem@gmail.com>
- Yves Vandervennet <yves.vandervennet@intel.com>
+Maintainer(s): Khem Raj <raj.khem@gmail.com>