1 files changed, 21 insertions, 1 deletions

diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
index b01659bd4f7c..a585079b4b38 100644
--- a/drivers/tty/hvc/hvc_opal.c
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -61,6 +61,7 @@ static struct hvc_opal_priv *hvc_opal_privs[MAX_NR_HVC_CONSOLES];
 /* For early boot console */
 static struct hvc_opal_priv hvc_opal_boot_priv;
 static u32 hvc_opal_boot_termno;
+static bool hvc_opal_event_registered;
 
 static const struct hv_ops hvc_opal_raw_ops = {
         .get_chars = opal_get_chars,
@@ -161,6 +162,18 @@ static const struct hv_ops hvc_opal_hvsi_ops = {
         .tiocmset = hvc_opal_hvsi_tiocmset,
 };
 
+static int hvc_opal_console_event(struct notifier_block *nb,
+                                  unsigned long events, void *change)
+{
+        if (events & OPAL_EVENT_CONSOLE_INPUT)
+                hvc_kick();
+        return 0;
+}
+
+static struct notifier_block hvc_opal_console_nb = {
+        .notifier_call  = hvc_opal_console_event,
+};
+
 static int hvc_opal_probe(struct platform_device *dev)
 {
         const struct hv_ops *ops;
@@ -170,6 +183,7 @@ static int hvc_opal_probe(struct platform_device *dev)
         unsigned int termno, boot = 0;
         const __be32 *reg;
 
+
         if (of_device_is_compatible(dev->dev.of_node, "ibm,opal-console-raw")) {
                 proto = HV_PROTOCOL_RAW;
                 ops = &hvc_opal_raw_ops;
@@ -213,12 +227,18 @@ static int hvc_opal_probe(struct platform_device *dev)
                 dev->dev.of_node->full_name,
                 boot ? " (boot console)" : "");
 
-        /* We don't do IRQ yet */
+        /* We don't do IRQ ... */
         hp = hvc_alloc(termno, 0, ops, MAX_VIO_PUT_CHARS);
         if (IS_ERR(hp))
                 return PTR_ERR(hp);
         dev_set_drvdata(&dev->dev, hp);
 
+        /* ...  but we use OPAL event to kick the console */
+        if (!hvc_opal_event_registered) {
+                opal_notifier_register(&hvc_opal_console_nb);
+                hvc_opal_event_registered = true;
+        }
+
         return 0;
 }