linux-kernel - [PATCH v1] ARM: dts: aspeed: yosemite4: Add i2c-mux for Management Board

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Message-Id: <20240926033534.4174707-1-Delphine_CC_Chiu@wiwynn.com>
Date: Thu, 26 Sep 2024 11:35:33 +0800
From: Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
To: patrick@...cx.xyz,
	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>
Cc: Ricky CX Wu <ricky.cx.wu.wiwynn@...il.com>,
	Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-aspeed@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] ARM: dts: aspeed: yosemite4: Add i2c-mux for Management Board

From: Ricky CX Wu <ricky.cx.wu.wiwynn@...il.com>

Add I2C mux for Management Board to separate the I2C bus 35 for
updating CPLD firmware and I2C bus 34 for the other devices.

Signed-off-by: Ricky CX Wu <ricky.cx.wu.wiwynn@...il.com>
Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
---
 .../aspeed/aspeed-bmc-facebook-yosemite4.dts  | 80 ++++++++++++++++---
 1 file changed, 69 insertions(+), 11 deletions(-)

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite4.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite4.dts
index 98477792aa00..234ce7019fca 100644
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite4.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-yosemite4.dts
@@ -17,6 +17,9 @@ aliases {
 		serial6 = &uart7;
 		serial7 = &uart8;
 		serial8 = &uart9;
+
+		i2c34 = &imux34;
+		i2c35 = &imux35;
 	};
 
 	chosen {
@@ -348,22 +351,77 @@ eeprom@54 {
 };
 
 &i2c12 {
+	#address-cells = <1>;
+	#size-cells = <0>;
 	status = "okay";
 	bus-frequency = <400000>;
 
-	temperature-sensor@48 {
-		compatible = "ti,tmp75";
-		reg = <0x48>;
-	};
+	i2c-mux@70 {
+		compatible = "nxp,pca9544";
+		reg = <0x70>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		i2c-mux-idle-disconnect;
 
-	eeprom@50 {
-		compatible = "atmel,24c128";
-		reg = <0x50>;
-	};
+		imux34: i2c@0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			temperature-sensor@48 {
+				compatible = "ti,tmp75";
+				reg = <0x48>;
+			};
+
+			eeprom@50 {
+				compatible = "atmel,24c128";
+				reg = <0x50>;
+			};
+
+			eeprom@54 {
+				compatible = "atmel,24c64";
+				reg = <0x54>;
+			};
+
+			rtc@6f {
+				compatible = "nuvoton,nct3018y";
+				reg = <0x6f>;
+			};
+
+			gpio@20 {
+				compatible = "nxp,pca9506";
+				reg = <0x20>;
+				gpio-controller;
+				#gpio-cells = <2>;
+			};
+
+			gpio@21 {
+				compatible = "nxp,pca9506";
+				reg = <0x21>;
+				gpio-controller;
+				#gpio-cells = <2>;
+			};
+
+			gpio@22 {
+				compatible = "nxp,pca9506";
+				reg = <0x22>;
+				gpio-controller;
+				#gpio-cells = <2>;
+			};
+
+			gpio@23 {
+				compatible = "nxp,pca9506";
+				reg = <0x23>;
+				gpio-controller;
+				#gpio-cells = <2>;
+			};
+		};
 
-	rtc@6f {
-		compatible = "nuvoton,nct3018y";
-		reg = <0x6f>;
+		imux35: i2c@1 {
+			reg = <1>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
 	};
 };
 
-- 
2.25.1