linux-kernel - [PATCH] ARM: dts: aspeed: catalina: add i2c-mux-idle-disconnect to all mux

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Message-Id: <20240920-catalina-i2c-mux-fix-2-v1-1-66cce7c54188@gmail.com>
Date: Fri, 20 Sep 2024 17:55:52 +0800
From: Potin Lai <potin.lai.pt@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Joel Stanley <joel@....id.au>, 
 Andrew Jeffery <andrew@...econstruct.com.au>, 
 Patrick Williams <patrick@...cx.xyz>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org, 
 Potin Lai <potin.lai@...ntatw.com>, Potin Lai <potin.lai.pt@...il.com>
Subject: [PATCH] ARM: dts: aspeed: catalina: add i2c-mux-idle-disconnect to
 all mux

Add the `i2c-mux-idle-disconnect` property to all i2c-mux nodes to
ensure proper behavior when switching between multiple I2C buses.
This avoids potential confusion caused by device addresses appearing on
multiple buses when they are not actively selected.

Signed-off-by: Potin Lai <potin.lai.pt@...il.com>
---
Add the i2c-mux-idle-disconnect property to all i2c-mux nodes to
ensure proper behavior when switching between multiple I2C buses.
This avoids potential confusion caused by device addresses appearing on
multiple buses when they are not actively selected.
---
 arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts | 7 +++++++
 1 file changed, 7 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 82835e96317d..fa0921a4afe2 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-catalina.dts
@@ -185,6 +185,7 @@ i2c-mux@71 {
 		reg = <0x71>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
 		i2c0mux0ch0: i2c@0 {
 			#address-cells = <1>;
@@ -213,6 +214,7 @@ i2c-mux@72 {
 		reg = <0x72>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
 		i2c0mux1ch0: i2c@0 {
 			#address-cells = <1>;
@@ -247,6 +249,7 @@ i2c-mux@70 {
 				reg = <0x70>;
 				#address-cells = <1>;
 				#size-cells = <0>;
+				i2c-mux-idle-disconnect;
 
 				i2c30mux0ch0: i2c@0 {
 					#address-cells = <1>;
@@ -328,6 +331,7 @@ i2c-mux@73 {
 		reg = <0x73>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
 		i2c0mux2ch0: i2c@0 {
 			#address-cells = <1>;
@@ -356,6 +360,7 @@ i2c-mux@75 {
 		reg = <0x75>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
 		i2c0mux3ch0: i2c@0 {
 			#address-cells = <1>;
@@ -384,6 +389,7 @@ i2c-mux@76 {
 		reg = <0x76>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
 		i2c0mux4ch0: i2c@0 {
 			#address-cells = <1>;
@@ -426,6 +432,7 @@ i2c-mux@77 {
 		reg = <0x77>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
 		i2c0mux5ch0: i2c@0 {
 			#address-cells = <1>;

---
base-commit: baeb9a7d8b60b021d907127509c44507539c15e5
change-id: 20240920-catalina-i2c-mux-fix-2-6dc48827a20a

Best regards,
-- 
Potin Lai <potin.lai.pt@...il.com>