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Date: Tue, 10 Aug 2021 19:29:21 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Marek Vasut <marex@...x.de>, Alexandre Torgue <alexandre.torgue@...s.st.com>, Patrice Chotard <patrice.chotard@...s.st.com>, Patrick Delaunay <patrick.delaunay@...s.st.com>, linux-stm32@...md-mailman.stormreply.com, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.10 027/135] ARM: dts: stm32: Disable LAN8710 EDPD on DHCOM From: Marek Vasut <marex@...x.de> [ Upstream commit 36862c1ebc92a7e6fcc55002965c44b8ad17d4ca ] The LAN8710 Energy Detect Power Down (EDPD) functionality might cause unreliable cable detection. There are multiple accounts of this in the SMSC PHY driver patches which attempted to make EDPD reliable, however it seems there is always some sort of corner case left. Unfortunatelly, there is no errata documented which would confirm this to be a silicon bug on the LAN87xx series of PHYs (LAN8700, LAN8710, LAN8720 at least). Disable EDPD on the DHCOM SoM, just like multiple other boards already do as well, to make the cable detection reliable. Fixes: 34e0c7847dcf ("ARM: dts: stm32: Add DH Electronics DHCOM STM32MP1 SoM and PDK2 board") Signed-off-by: Marek Vasut <marex@...x.de> Cc: Alexandre Torgue <alexandre.torgue@...s.st.com> Cc: Patrice Chotard <patrice.chotard@...s.st.com> Cc: Patrick Delaunay <patrick.delaunay@...s.st.com> Cc: linux-stm32@...md-mailman.stormreply.com To: linux-arm-kernel@...ts.infradead.org Signed-off-by: Alexandre Torgue <alexandre.torgue@...s.st.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi index 8221bf69fefe..000af7177701 100644 --- a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi +++ b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi @@ -133,6 +133,7 @@ reset-gpios = <&gpioh 3 GPIO_ACTIVE_LOW>; reset-assert-us = <500>; reset-deassert-us = <500>; + smsc,disable-energy-detect; interrupt-parent = <&gpioi>; interrupts = <11 IRQ_TYPE_LEVEL_LOW>; }; -- 2.30.2
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