[PATCH v6 08/10] ARM: dts: aspeed: catalina: Enable multi-master on additional I2C buses

From: Potin Lai
Date: Fri Mar 21 2025 - 03:30:21 EST


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 <potin.lai.pt@xxxxxxxxx>
---
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/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts
index 6702be32918e..2dbb65db9250 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts
@@ -815,6 +815,7 @@ ssif-bmc@10 {

&i2c12 {
status = "okay";
+ multi-master;

// Module 1 FRU EEPROM
eeprom@50 {
@@ -825,6 +826,7 @@ eeprom@50 {

&i2c13 {
status = "okay";
+ multi-master;

// Module 0 FRU EEPROM
eeprom@50 {

--
2.31.1