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From: Kurt Kanzenbach <>
To: Rob Herring <>,
	Maxime Coquelin <>,
	Alexandre Torgue <>
	Kurt Kanzenbach <>
Subject: [PATCH] ARM: dts: stm32: Add PTP clock to Ethernet controller
Date: Tue, 16 Mar 2021 09:06:44 +0100
Message-ID: <> (raw)

Add the PTP clock to the Ethernet controller. Otherwise, the driver uses the
main clock to derive the PTP frequency which is not necessarily the correct one.

Tested with linuxptp on Olimex STMP1-OLinuXino-LIME2.

Signed-off-by: Kurt Kanzenbach <>
 arch/arm/boot/dts/stm32mp151.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
index 3c75abacb374..d1f596ea2fd5 100644
--- a/arch/arm/boot/dts/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/stm32mp151.dtsi
@@ -1421,11 +1421,13 @@
+				      "ptp_ref",
 			clocks = <&rcc ETHMAC>,
 				 <&rcc ETHTX>,
 				 <&rcc ETHRX>,
 				 <&rcc ETHCK_K>,
+				 <&rcc ETHPTP_K>,
 				 <&rcc ETHSTP>;
 			st,syscon = <&syscfg 0x4>;

             reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16  8:06 Kurt Kanzenbach [this message]
2021-04-01  9:43 ` Alexandre TORGUE

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