diff --git a/tools/README.md b/tools/README.md
index 01bc30994..67f84dc7c 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -41,6 +41,8 @@ Usage sof-logger <option(s)> <file(s)>
 -o out_file		Specify the output file, instead of default stdout
 -t			Get traces from "/sys/kernel/debug/sof/trace", instead
 			of the default "/sys/kernel/debug/sof/etrace"
+-u baud			Input data from a UART
+-r			Less formatted output for chained log processors
 -p			Get traces from stdin, instead of the default
 			"/sys/kernel/debug/sof/etrace"
 -c			Set timestamp clock in MHz
@@ -48,7 +50,8 @@ Usage sof-logger <option(s)> <file(s)>
 			"/sys/kernel/debug/sof/fw_version"
 -v ver_file		Enable checking firmware version with ver_file file,
 			instead of default: "/sys/kernel/debug/sof/fw_version"
--s			Take a snapshot of state
+-s state_name		Take a snapshot of state. Save the debugfs entries in
+			state_name.*.txt.
 ```
 
 **Examples:**