From: Tobias Schramm <t.schramm@manjaro.org>
Date: Wed, 3 Jun 2020 13:10:40 +0000 (+0200)
Subject: ramips: mt7621: use higher SPI clock speed on Mikrotik rbm11g and rbm33g
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2f5a242f6762ce7233168785f1eb1ebcd1e4bd36;p=openwrt%2Fstaging%2Fjow.git

ramips: mt7621: use higher SPI clock speed on Mikrotik rbm11g and rbm33g

Previously the dts were using a value determined by empirical testing,
because of a spi driver/clock bug. The bug was fixed quite some time
ago. 33 MHz is the default clock frequency used by RouterBOOT and thus
safe.

Signed-off-by: Tobias Schramm <t.schramm@manjaro.org>
---

diff --git a/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m11g.dts b/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m11g.dts
index 2b05f1c2f2..cb13590017 100644
--- a/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m11g.dts
+++ b/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m11g.dts
@@ -83,8 +83,7 @@
 	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		// XXX empiric value to obtain actual 10MHz SCK at the chip
-		spi-max-frequency = <3125000>;
+		spi-max-frequency = <33000000>;
 
 		partitions {
 			compatible = "fixed-partitions";
diff --git a/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m33g.dts b/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m33g.dts
index 490f507fa9..ebe85b09a1 100644
--- a/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m33g.dts
+++ b/target/linux/ramips/dts/mt7621_mikrotik_routerboard-m33g.dts
@@ -93,7 +93,7 @@
 	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		spi-max-frequency = <3125000>;
+		spi-max-frequency = <33000000>;
 
 		partitions {
 			compatible = "fixed-partitions";
@@ -139,8 +139,7 @@
 	flash@1 {
 		compatible = "jedec,spi-nor";
 		reg = <1>;
-		// XXX empiric value to obtain actual 10MHz SCK at the chip
-		spi-max-frequency = <3125000>;
+		spi-max-frequency = <33000000>;
 
 		partitions {
 			compatible = "fixed-partitions";