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-rw-r--r--doc/device-tree-bindings/chosen.txt12
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/device-tree-bindings/chosen.txt b/doc/device-tree-bindings/chosen.txt
index 5625d210e8c..c96b8f71090 100644
--- a/doc/device-tree-bindings/chosen.txt
+++ b/doc/device-tree-bindings/chosen.txt
@@ -56,10 +56,20 @@ Each list element of the property should specify a device to be probed
in the order they are listed: references (i.e. implicit paths), a full
path or an alias is expected for each entry.
+A special specifier "same-as-spl" can be used at any position in the
+boot-order to direct U-Boot to insert the device the SPL was booted
+from there. Whether this is indeed inserted or silently ignored (if
+it is not supported on any given SoC/board or if the boot-device is
+not available to continue booting from) is implementation-defined.
+Note that if "same-as-spl" expands to an actual node for a given
+board, the corresponding node may appear multiple times in the
+boot-order (as there currently exists no mechanism to suppress
+duplicates from the list).
+
Example
-------
/ {
chosen {
- u-boot,spl-boot-order = &sdmmc, "/sdhci@fe330000";
+ u-boot,spl-boot-order = "same-as-spl", &sdmmc, "/sdhci@fe330000";
};
};