HID: samples/hidraw: make it possible to select device

Makefile that can actually build the example, and allow selecting device to work on. Signed-off-by: Pavel Machek <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
kawasaki · Mar 15, 2015 · 04303f8 · 04303f8
1 parent f3dddf2
commit 04303f8
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/samples/hidraw/Makefile b/samples/hidraw/Makefile
@@ -8,3 +8,5 @@ hostprogs-y := hid-example
 always := $(hostprogs-y)
 
 HOSTCFLAGS_hid-example.o += -I$(objtree)/usr/include
+
+all: hid-example
diff --git a/samples/hidraw/hid-example.c b/samples/hidraw/hid-example.c
@@ -46,10 +46,14 @@ int main(int argc, char **argv)
 	char buf[256];
 	struct hidraw_report_descriptor rpt_desc;
 	struct hidraw_devinfo info;
+	char *device = "/dev/hidraw0";
+
+	if (argc > 1)
+		device = argv[1];
 
 	/* Open the Device with non-blocking reads. In real life,
 	   don't use a hard coded path; use libudev instead. */
-	fd = open("/dev/hidraw0", O_RDWR|O_NONBLOCK);
+	fd = open(device, O_RDWR|O_NONBLOCK);
 
 	if (fd < 0) {
 		perror("Unable to open device");
Original file line number	Diff line number	Diff line change
Expand Up		@@ -8,3 +8,5 @@ hostprogs-y := hid-example
		always := $(hostprogs-y)

		HOSTCFLAGS_hid-example.o += -I$(objtree)/usr/include

		all: hid-example