xen/arm: New callback in uart_driver to get device tree interrupt structure

The existing function serial_irq doesn't allow to retrieve if the interrupt
is edge or level trigger.

Use this function to routes IRQs for all serial ports which Xen is using
to Xen.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/xen/drivers/char/serial.c b/xen/drivers/char/serial.c
index a3d2b26cd9..0ae7e4daeb 100644
--- a/xen/drivers/char/serial.c
+++ b/xen/drivers/char/serial.c
@@ -482,6 +482,16 @@ int __init serial_irq(int idx)
     return -1;
 }
 
+const struct dt_irq __init *serial_dt_irq(int idx)
+{
+    if ( (idx >= 0) && (idx < ARRAY_SIZE(com)) &&
+         com[idx].driver && com[idx].driver->dt_irq_get )
+        return com[idx].driver->dt_irq_get(&com[idx]);
+
+    return NULL;
+}
+
+
 void serial_suspend(void)
 {
     int i;