1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
index 4ca130a90ea5..8bffe9ae2ca0 100644
--- a/include/linux/serial_sci.h
+++ b/include/linux/serial_sci.h
@@ -56,6 +56,8 @@ enum {
         SCIx_TXI_IRQ,
         SCIx_BRI_IRQ,
         SCIx_NR_IRQS,
+
+        SCIx_MUX_IRQ = SCIx_NR_IRQS,    /* special case */
 };
 
 enum {
@@ -82,6 +84,11 @@ enum {
         [SCIx_BRI_IRQ]  = (irq),        \
 }
 
+#define SCIx_IRQ_IS_MUXED(port)                 \
+        ((port)->cfg->irqs[SCIx_ERI_IRQ] ==     \
+         (port)->cfg->irqs[SCIx_RXI_IRQ]) ||    \
+        ((port)->cfg->irqs[SCIx_ERI_IRQ] &&     \
+         !(port)->cfg->irqs[SCIx_RXI_IRQ])
 /*
  * SCI register subset common for all port types.
  * Not all registers will exist on all parts.