From: Koen Vandeputte Date: Wed, 12 Jan 2022 15:11:15 +0000 (+0100) Subject: ath79: rb912: fix pll init issues X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=2a000546187122c86143c97337af4d5beacc4908;p=openwrt%2Fstaging%2Flinusw.git ath79: rb912: fix pll init issues It was reported that some rb912 boards (ar934x) have issues with some ethernet speeds. Investigation shows that the board failed to adapt the ethernet pll values as shown here: [ 5.284359] ag71xx 19000000.eth: failed to read pll-handle property added custom prints in code and triggering a link switch: [ 62.821446] Atheros AG71xx: fast reset [ 62.826442] Atheros AG71xx: update pll 2 [ 62.830494] Atheros AG71xx: no pll regmap! Comparison with another very similar board (rb922 - QCA955x) showed a missing reference clock frequency in dts, which seems to cause a pll init issue. Unfortunately, no errors are printed when this occurs. Adding the frequency property fixes the pll init as it can be parsed now by the ethernet driver. [ 55.861407] Atheros AG71xx: fast reset [ 55.866403] Atheros AG71xx: update pll 2 [ 55.870462] Atheros AG71xx: ath79_set_pllval: regmap: 0x81548000, pll_reg: 0x2c, pll_val: 0x02000000 Signed-off-by: Sergey Ryazanov Signed-off-by: Koen Vandeputte --- 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 ee2c12b4e0..14286ae8f7 100644 --- a/target/linux/ath79/dts/ar9342_mikrotik_routerboard-912uag-2hpnd.dts +++ b/target/linux/ath79/dts/ar9342_mikrotik_routerboard-912uag-2hpnd.dts @@ -127,6 +127,10 @@ }; }; +&ref { + clock-frequency = <25000000>; +}; + &spi { status = "okay";