[PATCH 5.5 255/399] MIPS: ralink: dts: gardena_smart_gateway_mt7688: Limit UART1

[Greg Kroah-Hartman]

From: Reto Schneider <reto.schneider@xxxxxxxxxxxxxxxxxx>

[ Upstream commit e8c192011c920517e5578d51c7aff0ecadd25de3 ]

The radio module asserts CTS when its RX buffer has 10 bytes left.
Putting just 8 instead of 16 bytes into the UART1 TX buffer on the Linux
side ensures to not overflow the RX buffer on the radio module side.

Signed-off-by: Reto Schneider <reto.schneider@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Stefan Roese <sr@xxxxxxx>
Cc: Paul Burton <paul.burton@xxxxxxxx>
Signed-off-by: Paul Burton <paulburton@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts b/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts
index aa5caaa311047..aad9a8a8669b4 100644
--- a/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts
+++ b/arch/mips/boot/dts/ralink/gardena_smart_gateway_mt7688.dts
@@ -177,6 +177,9 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinmux_i2s_gpio>;		/* GPIO0..3 */
 
+	fifo-size = <8>;
+	tx-threshold = <8>;
+
 	rts-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
 	cts-gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
 };
-- 
2.20.1