From: Lech Perczak <lech.perczak@gmail.com>
Date: Wed, 12 Feb 2025 01:25:53 +0000 (+0100)
Subject: ath79: mikrotik: fix reference clock of Routerboard 911G
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=40fc6bd5cc679875e38ea1769527affdb5be12ba;p=openwrt%2Fstaging%2Fstintel.git

ath79: mikrotik: fix reference clock of Routerboard 911G

When support for Routerboard 911G was introduced, Routerboad 912UAG
device tree was used as a base, and the common part. This led to use of
40MHz as the reference clock frequency for both [1], while RB911G uses 25MHz
crystal on the board, causing heavy system clock drift.

Split the definition, and set the reference clock frequency for RB911G
back to 25MHz.

[1] a716ac556497 ("ath79: fix reference clock for RouterBoard 912UAG")

Fixes: bcc44b1212b2 ("ath79: support for MikroTik RouterBOARD 911G-(2,5)HPnD")
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17944
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---

diff --git a/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g-xhpnd.dts b/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g-xhpnd.dts
index 5fa44b4412..655c590f8c 100644
--- a/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g-xhpnd.dts
+++ b/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g-xhpnd.dts
@@ -9,3 +9,7 @@
 	compatible = "mikrotik,routerboard-911g-xhpnd", "qca,ar9342";
 	model = "MikroTik RouterBOARD 911G-(2,5)HPnD";
 };
+
+&ref {
+	clock-frequency = <25000000>;
+};
diff --git a/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g.dtsi b/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g.dtsi
index 0c98a6634e..3a8c60456f 100644
--- a/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g.dtsi
+++ b/target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g.dtsi
@@ -146,10 +146,6 @@
 	};
 };
 
-&ref {
-	clock-frequency = <40000000>;
-};
-
 &spi {
 	status = "okay";
 
diff --git a/target/linux/ath79/dts/ar9342_mikrotik_routerboard-912uag-2hpnd.dts b/target/linux/ath79/dts/ar9342_mikrotik_routerboard-912uag-2hpnd.dts
index 81d7284b3d..4cf62349f5 100644
--- a/target/linux/ath79/dts/ar9342_mikrotik_routerboard-912uag-2hpnd.dts
+++ b/target/linux/ath79/dts/ar9342_mikrotik_routerboard-912uag-2hpnd.dts
@@ -10,6 +10,10 @@
 	model = "MikroTik RouterBOARD 912UAG-(2,5)HPnD";
 };
 
+&ref {
+	clock-frequency = <40000000>;
+};
+
 &pcie {
 	status = "okay";
 };