[RFCv1 PATCH 19/32] v4l2-dev.c: add debug sysfs entry.

[Hans Verkuil]

From: Hans Verkuil <hans.verk...@cisco.com>

Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
 drivers/media/video/v4l2-dev.c |   24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 1500208..5c0bb18 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -46,6 +46,29 @@ static ssize_t show_index(struct device *cd,
        return sprintf(buf, "%i\n", vdev->index);
 }
 
+static ssize_t show_debug(struct device *cd,
+                        struct device_attribute *attr, char *buf)
+{
+       struct video_device *vdev = to_video_device(cd);
+
+       return sprintf(buf, "%i\n", vdev->debug);
+}
+
+static ssize_t set_debug(struct device *cd, struct device_attribute *attr,
+                  const char *buf, size_t len)
+{
+       struct video_device *vdev = to_video_device(cd);
+       int res = 0;
+       u16 value;
+
+       res = kstrtou16(buf, 0, &value);
+       if (res)
+               return res;
+
+       vdev->debug = value;
+       return len;
+}
+
 static ssize_t show_name(struct device *cd,
                         struct device_attribute *attr, char *buf)
 {
@@ -56,6 +79,7 @@ static ssize_t show_name(struct device *cd,
 
 static struct device_attribute video_device_attrs[] = {
        __ATTR(name, S_IRUGO, show_name, NULL),
+       __ATTR(debug, 0644, show_debug, set_debug),
        __ATTR(index, S_IRUGO, show_index, NULL),
        __ATTR_NULL
 };
-- 
1.7.10

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