tools: note that the mouse frequency measured is the highest frequency

Some devices scale the frequency based on the input and will provide
recordings with different frequencies each time. Recommend to measure multiple
times since we can only know what the highest frequency is.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/tools/mouse-dpi-tool.c b/tools/mouse-dpi-tool.c
index dc54a0d87cdd28dab13902f866587c171e7687bf..be30a4db67f2e7d338d09e929e83469b0e97347e 100644 (file)
--- a/tools/mouse-dpi-tool.c
+++ b/tools/mouse-dpi-tool.c
@@ -51,8 +51,10 @@ static int
 usage(void) {
        printf("Usage: %s /dev/input/event0\n", program_invocation_short_name);
        printf("\n");
-       printf("This tool reads relative events from the kernel and calculates\n "
-              "the distance covered and frequency of the incoming events.\n");
+       printf("This tool reads relative events from the kernel and calculates\n"
+              "the distance covered and maximum frequency of the incoming events.\n"
+              "Some mouse devices provide dynamic frequencies, it is\n"
+              "recommended to measure multiple times to obtain the highest value.\n");
        return 1;
 }