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-rw-r--r--cmds/uinput/README.md5
1 files changed, 5 insertions, 0 deletions
diff --git a/cmds/uinput/README.md b/cmds/uinput/README.md
index 5d3f12e0d59f..6138388b30c7 100644
--- a/cmds/uinput/README.md
+++ b/cmds/uinput/README.md
@@ -83,6 +83,11 @@ control values to be sent to the uinput device, which depends on the control cod
Due to the sequential nature in which this is parsed, the `type` field must be specified before
the `data` field in this JSON Object.
+Every `register` command will need a `"UI_SET_EVBIT"` configuration entry that lists what types of
+axes it declares. This entry should be the first in the list. For example, if the uinput device has
+`"UI_SET_KEYBIT"` and `"UI_SET_RELBIT"` configuration entries, it will also need a `"UI_SET_EVBIT"`
+entry with data of `["EV_KEY", "EV_REL"]` or the other configuration entries will be ignored.
+
`ff_effects_max` must be provided if `UI_SET_FFBIT` is used in `configuration`.
`abs_info` fields are provided to set the device axes information. It is an array of below objects: