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 <pavel@ucw.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

2 files changed, 7 insertions, 1 deletions

diff --git a/samples/hidraw/Makefile b/samples/hidraw/Makefile
index 382eeae77bd6..a9ab96188fbe 100644
--- 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
index 512a7e50bcae..92e6c1511910 100644
--- 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");