0001-Reduce-max-SPI-clock-frequency-on-flash.patch

From 45a56caac5e0b79017afc0e3baa479d1588e0eba Mon Sep 17 00:00:00 2001
From: Sven Schwermer <sven@svenschwermer.de>
Date: Sun, 16 Sep 2018 15:32:36 +0200
Subject: [PATCH] Reduce max SPI clock frequency on flash

This solves signal integrity problems when there are long traces hooked
up to the CLK and MOSI lines that are shared with the SPI flash.
---
 target/linux/ramips/dts/LINKIT7688.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/linux/ramips/dts/LINKIT7688.dts b/target/linux/ramips/dts/LINKIT7688.dts
index a81a2d5..e5135bc 100644
--- a/target/linux/ramips/dts/LINKIT7688.dts
+++ b/target/linux/ramips/dts/LINKIT7688.dts
@@ -100,7 +100,7 @@
 		#size-cells = <1>;
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		spi-max-frequency = <40000000>;
+		spi-max-frequency = <1000000>;
 		m25p,chunked-io = <31>;
 
 		partition@0 {
@@ -131,7 +131,7 @@
 		#size-cells = <1>;
 		compatible = "linux,spidev";
 		reg = <1>;
-		spi-max-frequency = <40000000>;
+		spi-max-frequency = <1000000>;
 	};
 };
 
-- 
1.9.1