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[61.220.246.151]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-301bf576bc2sm1863641a91.5.2025.03.19.09.50.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Mar 2025 09:50:11 -0700 (PDT) From: Potin Lai Date: Thu, 20 Mar 2025 00:47:29 +0800 Subject: [PATCH v4 8/8] ARM: dts: aspeed: catalina: Enable multi-master on additional I2C buses Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250320-potin-catalina-dts-update-20250102-v4-8-7c34b8139014@gmail.com> References: <20250320-potin-catalina-dts-update-20250102-v4-0-7c34b8139014@gmail.com> In-Reply-To: <20250320-potin-catalina-dts-update-20250102-v4-0-7c34b8139014@gmail.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , Andrew Jeffery , Patrick Williams Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, Cosmo Chou , Potin Lai , Potin Lai X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1742402988; l=1008; i=potin.lai.pt@gmail.com; s=20240724; h=from:subject:message-id; bh=jtqICxpttL+081MeVsrW0PF8g0r+obZJAZMWsooXIQ0=; b=x6Gzmnb1MJYvPzx8ZwKN1PgPtzH5ZXo5LlnNEMXuS0IyPsgHR2WVwVGglPj2osLT16/A3QCp2 K9s+FG9+ciTAQDpvzrXkOqQ9lzlBFMDWvik3mUz8hcRRxrN+hXsLbaH X-Developer-Key: i=potin.lai.pt@gmail.com; a=ed25519; pk=6Z4H4V4fJwLteH/WzIXSsx6TkuY5FOcBBP+4OflJ5gM= Update the device tree to enable `multi-master` mode on I2C buses shared between the host BMC and the NV module with HMC. This ensures proper bus arbitration and coordination in multi-master environments, preventing communication conflicts and improving reliability. Signed-off-by: Potin Lai --- arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts b/ar= ch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts index 573701bb7fee..c11de5a61912 100644 --- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts @@ -800,6 +800,7 @@ ssif-bmc@10 { =20 &i2c12 { status =3D "okay"; + multi-master; =20 // Module 1 FRU EEPROM eeprom@50 { @@ -810,6 +811,7 @@ eeprom@50 { =20 &i2c13 { status =3D "okay"; + multi-master; =20 // Module 0 FRU EEPROM eeprom@50 { --=20 2.31.1