From: Aleksander Jan Bajkowski <A.Bajkowski@stud.elka.pw.edu.pl>
Date: Sat, 18 Apr 2020 12:40:08 +0000 (+0200)
Subject: ath79: increase spi frequency on tp-link tl-wr1043nd v2
X-Git-Tag: v21.02.0-rc1~2804
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=2f7118712e383661853bfd26d18bb4c71554287b;p=openwrt%2Fopenwrt.git

ath79: increase spi frequency on tp-link tl-wr1043nd v2

Increase SPI frequency to 33.333 MHz. It's maximum frequency supported
by SPI Flash memory chip without Fast read opcode.

Before:
$ time dd if=/dev/mtd1 of=/dev/null bs=8M
0+1 records in
0+1 records out
real	0m 3.21s
user	0m 0.00s
sys	0m 3.21s

After:
$ time dd if=/dev/mtd1 of=/dev/null bs=8M
0+1 records in
0+1 records out
real	0m 2.52s
user	0m 0.00s
sys	0m 2.52s

Tested on TP-Link TL-WR1043ND V2.

Signed-off-by: Aleksander Jan Bajkowski <A.Bajkowski@stud.elka.pw.edu.pl>
---

diff --git a/target/linux/ath79/dts/qca9558_tplink_tl-wr1043nd.dtsi b/target/linux/ath79/dts/qca9558_tplink_tl-wr1043nd.dtsi
index 72062e5d1e..bfa29fece3 100644
--- a/target/linux/ath79/dts/qca9558_tplink_tl-wr1043nd.dtsi
+++ b/target/linux/ath79/dts/qca9558_tplink_tl-wr1043nd.dtsi
@@ -106,7 +106,7 @@
 	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		spi-max-frequency = <25000000>;
+		spi-max-frequency = <33400000>;
 
 		partitions {
 			compatible = "fixed-partitions";