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-rw-r--r--drivers/staging/pi433/rf69_enum.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/staging/pi433/rf69_enum.h b/drivers/staging/pi433/rf69_enum.h
index fbf56fcf5fe8..b33a33a85d3b 100644
--- a/drivers/staging/pi433/rf69_enum.h
+++ b/drivers/staging/pi433/rf69_enum.h
@@ -110,12 +110,24 @@ enum fifo_fill_condition {
};
enum packet_format {
+ /*
+ * Used when the size of payload is fixed in advance. This mode of
+ * operation may be of interest to minimize RF overhead by 1 byte as
+ * no length byte field is required
+ */
packet_length_fix,
+ /*
+ * Used when the size of payload isn't known in advance. It requires the
+ * transmitter to send the length byte in each packet so the receiver
+ * would know how to operate properly
+ */
packet_length_var
};
enum tx_start_condition {
+ /* the number of bytes in the FIFO exceeds FIFO_THRESHOLD */
fifo_level,
+ /* at least one byte in the FIFO */
fifo_not_empty
};