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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Holger Assmann <h.assmann@pengutronix.de>,
        Ahmad Fatoum <a.fatoum@pengutronix.de>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.8 508/633] ARM: dts: stm32: lxa-mc1: Fix kernel warning about PHY delays
Date:   Tue, 27 Oct 2020 14:54:11 +0100
Message-Id: <20201027135546.566236413@linuxfoundation.org>
In-Reply-To: <20201027135522.655719020@linuxfoundation.org>
References: <20201027135522.655719020@linuxfoundation.org>
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From: Holger Assmann <h.assmann@pengutronix.de>

[ Upstream commit 42a31ac6698681363363d48335559d212a26a7ca ]

The KSZ9031 PHY skew timings for rxc/txc, originally set to achieve
the desired phase shift between clock- and data-signal, now trigger a
kernel warning when used in rgmii-id mode:

 *-skew-ps values should be used only with phy-mode = "rgmii"

This is because commit bcf3440c6dd7 ("net: phy: micrel: add phy-mode
support for the KSZ9031 PHY") now configures own timings when
phy-mode = "rgmii-id". Device trees wanting to set their own delays
should use phy-mode "rgmii" instead as the warning prescribes.

The "standard" timings now used with "rgmii-id" work fine on this
board, so drop the explicit timings in the device tree and thereby
silence the warning.

Fixes: 666b5ca85cd3 ("ARM: dts: stm32: add STM32MP1-based Linux Automation MC-1 board")
Signed-off-by: Holger Assmann <h.assmann@pengutronix.de>
Acked-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
index 5700e6b700d36..b85025d009437 100644
--- a/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
@@ -121,8 +121,6 @@ ethphy: ethernet-phy@3 { /* KSZ9031RN */
 			reset-gpios = <&gpiog 0 GPIO_ACTIVE_LOW>; /* ETH_RST# */
 			interrupt-parent = <&gpioa>;
 			interrupts = <6 IRQ_TYPE_EDGE_FALLING>; /* ETH_MDINT# */
-			rxc-skew-ps = <1860>;
-			txc-skew-ps = <1860>;
 			reset-assert-us = <10000>;
 			reset-deassert-us = <300>;
 			micrel,force-master;
-- 
2.25.1