From: "Fong, Yan Kei" <yan.kei.fong@altera.com>

Add spi-tx-bus-width and spi-rx-bus-width properties with value 4 to the n5x 
device tree. This update configures the SPI controller to use a 4-bit bus width
for both transmission and reception, potentially improving SPI throughput and
matching the hardware capabilities more closely.

Signed-off-by: Fong, Yan Kei <yan.kei.fong@altera.com>
Reviewed-by: Khairul Anuar Romli <khairul.anuar.romli@altera.com>
Reviewed-by: Matthew Gerlach <matthew.gerlach@altera.com>
---
 arch/arm64/boot/dts/intel/socfpga_n5x_socdk.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/intel/socfpga_n5x_socdk.dts b/arch/arm64/boot/dts/intel/socfpga_n5x_socdk.dts
index 7952c7f47cc2..0034a4897220 100644
--- a/arch/arm64/boot/dts/intel/socfpga_n5x_socdk.dts
+++ b/arch/arm64/boot/dts/intel/socfpga_n5x_socdk.dts
@@ -93,6 +93,8 @@ flash@0 {
 		cdns,tsd2d-ns = <50>;
 		cdns,tchsh-ns = <4>;
 		cdns,tslch-ns = <4>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
 
 		partitions {
 			compatible = "fixed-partitions";
-- 
2.25.1