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From: Michael Walle <>
Cc: Shawn Guo <>, Li Yang <>,
	Rob Herring <>,
	Michael Walle <>
Subject: [PATCH v2 2/2] arm64: dts: freescale: sl28: var1: fix RGMII clock and voltage
Date: Fri, 14 May 2021 20:55:53 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

During hardware validation it was noticed that the clock isn't
continuously enabled when there is no link. This is because the 125MHz
clock is derived from the internal PLL which seems to go into some kind
of power-down mode every once in a while. The LS1028A expects a contiuous
clock. Thus enable the PLL all the time.

Also, the RGMII pad voltage is wrong, it was configured to 2.5V (that is
the VDDH regulator). The correct voltage is 1.8V, i.e. the VDDIO

This fix is for the freescale/fsl-ls1028a-kontron-sl28-var1.dts.

Fixes: 642856097c18 ("arm64: dts: freescale: sl28: add variant 1")
Signed-off-by: Michael Walle <>
 .../arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts
index 6c309b97587d..e8d31279b7a3 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var1.dts
@@ -46,7 +46,8 @@
 			qca,clk-out-frequency = <125000000>;
 			qca,clk-out-strength = <AR803X_STRENGTH_FULL>;
-			vddio-supply = <&vddh>;
+			qca,keep-pll-enabled;
+			vddio-supply = <&vddio>;
 			vddio: vddio-regulator {
 				regulator-name = "VDDIO";

linux-arm-kernel mailing list

  parent reply	other threads:[~2021-05-14 18:58 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-14 18:55 [PATCH v2 0/2] arm64: dts: freescale: sl28: fix RGMII Michael Walle
2021-05-14 18:55 ` [PATCH v2 1/2] arm64: dts: freescale: sl28: var4: fix RGMII clock and voltage Michael Walle
2021-05-14 18:55 ` Michael Walle [this message]
2021-05-23  5:08 ` [PATCH v2 0/2] arm64: dts: freescale: sl28: fix RGMII Shawn Guo

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