video: adf: make dpms_state sysfs attribute writable

Change-Id: I04e7785cbddac160003e6c9edaf62d20b367fdc9
Signed-off-by: Greg Hackmann <ghackmann@google.com>

diff --git a/drivers/video/adf/adf_sysfs.c b/drivers/video/adf/adf_sysfs.c
index 567c5599793bc5f5bd5b311760955aa1b6f8d13a..076ccbd0cd888fca4d7a210489426f6f493a2c67 100644 (file)
--- a/drivers/video/adf/adf_sysfs.c
+++ b/drivers/video/adf/adf_sysfs.c
@@ -33,6 +33,24 @@ static ssize_t dpms_state_show(struct device *dev,
                        adf_interface_dpms_state(intf));
 }
 
+static ssize_t dpms_state_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       struct adf_interface *intf = dev_to_adf_interface(dev);
+       u8 dpms_state;
+       int err;
+
+       err = kstrtou8(buf, 0, &dpms_state);
+       if (err < 0)
+               return err;
+
+       err = adf_interface_blank(intf, dpms_state);
+       if (err < 0)
+               return err;
+
+       return count;
+}
+
 static ssize_t current_mode_show(struct device *dev,
                struct device_attribute *attr, char *buf)
 {
@@ -80,7 +98,7 @@ static ssize_t hotplug_detect_show(struct device *dev,
 }
 
 static struct device_attribute adf_interface_attrs[] = {
-       __ATTR_RO(dpms_state),
+       __ATTR(dpms_state, S_IRUGO|S_IWUSR, dpms_state_show, dpms_state_store),
        __ATTR_RO(current_mode),
        __ATTR_RO(hotplug_detect),
        __ATTR_RO(type),