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Diffstat (limited to 'README')
| -rw-r--r-- | README | 25 |
1 files changed, 22 insertions, 3 deletions
@@ -11,9 +11,6 @@ See this for the format of an overlay: https://www.kernel.org/doc/Documentation/devicetree/overlay-notes.txt -Note that as of 10 May 2019, no overlays have been -released. - The biggest flaw in overlays, is the inablitiy to use the phandle described in an alias in the boot time device tree in an overlay, so it appears @@ -23,3 +20,25 @@ is common to reference a "pio" in device tree to use a PIO with GPIO. For example, it does not appear to be possible to use &pioC in the overlay without redefining it. + +The recipe that uses the overlay reads a comment +in the overlay source to determine the destination +and any symlink locations. + +The comment in the file must be as follows for +locations and symlinks: + +/* + * Put: /a/b/c/d.dtbo + * Link: /a/x/y/d.dtbo + * + */ + +The install is looking for a line that +starts with " * Put: " or " * Link: ". +Extra spaces before the path are allowed. +The link will always point at the path +specified by Put. + +The path given is relative to the device +tree overlay location. |