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ath79: mikrotik: fix reference clock of Routerboard 911G

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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>
(cherry picked from commit 40fc6bd5cc679875e38ea1769527affdb5be12ba)
This commit is contained in:
Lech Perczak 2025-02-12 02:25:53 +01:00 committed by Hauke Mehrtens
parent d89527ce14
commit 424d758d1f
3 changed files with 8 additions and 4 deletions
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4
target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g-xhpnd.dts
View File

@ -9,3 +9,7 @@
compatible = "mikrotik,routerboard-911g-xhpnd", "qca,ar9342";
model = "MikroTik RouterBOARD 911G-(2,5)HPnD";
};
&ref {
clock-frequency = <25000000>;
};

4
target/linux/ath79/dts/ar9342_mikrotik_routerboard-911g.dtsi
View File

@ -146,10 +146,6 @@
};
};
&ref {
clock-frequency = <40000000>;
};
&spi {
status = "okay";

4
target/linux/ath79/dts/ar9342_mikrotik_routerboard-912uag-2hpnd.dts
View File

@ -10,6 +10,10 @@
model = "MikroTik RouterBOARD 912UAG-(2,5)HPnD";
};
&ref {
clock-frequency = <40000000>;
};
&pcie {
status = "okay";
};