ideapad: let camera_power node invisiable if no camera

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index 42b9ba7e903c..1612abde5188 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -38,6 +38,7 @@
 #define CFG_BT_BIT      (16)
 #define CFG_3G_BIT      (17)
 #define CFG_WIFI_BIT    (18)
+#define CFG_CAMERA_BIT  (19)
 
 struct ideapad_private {
         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
@@ -208,7 +209,24 @@ static struct attribute *ideapad_attributes[] = {
         NULL
 };
 
+static mode_t ideapad_is_visible(struct kobject *kobj,
+                                 struct attribute *attr,
+                                 int idx)
+{
+        struct device *dev = container_of(kobj, struct device, kobj);
+        struct ideapad_private *priv = dev_get_drvdata(dev);
+        bool supported;
+
+        if (attr == &dev_attr_camera_power.attr)
+                supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
+        else
+                supported = true;
+
+        return supported ? attr->mode : 0;
+}
+
 static struct attribute_group ideapad_attribute_group = {
+        .is_visible = ideapad_is_visible,
         .attrs = ideapad_attributes
 };