From: Sungbo Eo <mans0n@gorani.run>
Date: Sun, 5 Apr 2020 05:11:34 +0000 (+0900)
Subject: ramips: increase spi-max-frequency for ipTIME mt7620 devices
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=13a185bf8acb67da4a68873e560876c0e60b1a87;p=openwrt%2Fstaging%2Faparcar.git

ramips: increase spi-max-frequency for ipTIME mt7620 devices

This commit increases the hardware SPI frequency from 24.2MHz to 48.3MHz.

[    5.314163] m25p80 spi0.0: speed: 24166666/40000000, rate: 8, prescal: 2, loops: 226
[    5.076323] m25p80 spi0.0: speed: 48333333/50000000, rate: 4, prescal: 1, loops: 162

`time cat /dev/mtd2 >/dev/null` is reduced from 5.64s to 4.36s on A104ns,
and from 11.39s to 8.81s on A1004ns.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>
---

diff --git a/target/linux/ramips/dts/mt7620a_iptime.dtsi b/target/linux/ramips/dts/mt7620a_iptime.dtsi
index 5a6fdacb52..c7c90ca722 100644
--- a/target/linux/ramips/dts/mt7620a_iptime.dtsi
+++ b/target/linux/ramips/dts/mt7620a_iptime.dtsi
@@ -21,7 +21,7 @@
 	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		spi-max-frequency = <40000000>;
+		spi-max-frequency = <50000000>;
 
 		partitions {
 			compatible = "fixed-partitions";