nios2: dts: 10m50: Add tx-threshold parameter

The tx-threshold parameter sets the TX FIFO low water threshold
trigger for the Altera 16550-FIFO32 soft IP.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/nios2/boot/dts/10m50_devboard.dts b/arch/nios2/boot/dts/10m50_devboard.dts
index 3e411c6..f362b22 100755 (executable)
--- a/arch/nios2/boot/dts/10m50_devboard.dts
+++ b/arch/nios2/boot/dts/10m50_devboard.dts
@@ -83,6 +83,7 @@
                        fifo-size = <32>;
                        reg-io-width = <4>;
                        reg-shift = <2>;
+                       tx-threshold = <16>;
                };
 
                sysid: sysid@18001528 {