linux-kernel - [PATCH 5.10 027/135] ARM: dts: stm32: Disable LAN8710 EDPD on DHCOM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210810172956.599446244@linuxfoundation.org>
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