[OpenWrt-Devel] [PATCH 1/1] ramips: mt7621: use higher SPI clock speed on Mikrotik rbm11g and rbm33g

[Tobias Schramm]

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 at manjaro.org>
---
 target/linux/ramips/dts/mt7621_mikrotik_rbm11g.dts | 4 ++--
 target/linux/ramips/dts/mt7621_mikrotik_rbm33g.dts | 7 ++++---
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/target/linux/ramips/dts/mt7621_mikrotik_rbm11g.dts b/target/linux/ramips/dts/mt7621_mikrotik_rbm11g.dts
index aae899c9a6..b0a31602e3 100644
--- a/target/linux/ramips/dts/mt7621_mikrotik_rbm11g.dts
+++ b/target/linux/ramips/dts/mt7621_mikrotik_rbm11g.dts
@@ -83,8 +83,8 @@
 	w25q128 at 0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		// XXX empiric value to obtain actual 10MHz SCK at the chip
-		spi-max-frequency = <3125000>;
+		m25p,fast-read;
+		spi-max-frequency = <33000000>;
 
 		partitions {
 			compatible = "fixed-partitions";
diff --git a/target/linux/ramips/dts/mt7621_mikrotik_rbm33g.dts b/target/linux/ramips/dts/mt7621_mikrotik_rbm33g.dts
index f7889bd68a..84bdaf06f1 100644
--- a/target/linux/ramips/dts/mt7621_mikrotik_rbm33g.dts
+++ b/target/linux/ramips/dts/mt7621_mikrotik_rbm33g.dts
@@ -93,7 +93,8 @@
 	w25q40 at 0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		spi-max-frequency = <3125000>;
+		m25p,fast-read;
+		spi-max-frequency = <33000000>;
 
 		partitions {
 			compatible = "fixed-partitions";
@@ -143,8 +144,8 @@
 	w25q128 at 1 {
 		compatible = "jedec,spi-nor";
 		reg = <1>;
-		// XXX empiric value to obtain actual 10MHz SCK at the chip
-		spi-max-frequency = <3125000>;
+		m25p,fast-read;
+		spi-max-frequency = <33000000>;
 
 		partitions {
 			compatible = "fixed-partitions";
-- 
2.26.0


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