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[60.250.196.139]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35987523629sm2764697a91.7.2026.03.01.18.08.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Mar 2026 18:08:54 -0800 (PST) From: Zi-Yu Chen To: andi.shyti@kernel.org, ychuang3@nuvoton.com Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, zychennvt@gmail.com Subject: [PATCH 3/3] arm64: dts: nuvoton: Add I2C nodes for MA35D1 SoC Date: Mon, 2 Mar 2026 02:08:22 +0000 Message-Id: <20260302020822.13936-4-zychennvt@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260302020822.13936-1-zychennvt@gmail.com> References: <20260302020822.13936-1-zychennvt@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add I2C controller nodes to the MA35D1 SoC dtsi. Also enable the I2C interfaces on the MA35D1 SOM board to allow communication with onboard peripherals. Signed-off-by: Zi-Yu Chen --- .../boot/dts/nuvoton/ma35d1-som-256m.dts | 14 ++++ arch/arm64/boot/dts/nuvoton/ma35d1.dtsi | 65 +++++++++++++++++++ 2 files changed, 79 insertions(+) diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts index f6f20a17e501..2a8f0fd90ded 100644 --- a/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts +++ b/arch/arm64/boot/dts/nuvoton/ma35d1-som-256m.dts @@ -98,6 +98,14 @@ pinctrl_uart16: uart16-pins { power-source = <1>; }; }; + i2c-grp { + pinctrl_i2c1: i2c1-pins { + nuvoton,pins = <1 10 12>, + <1 11 12>; + bias-disable; + }; + + }; }; &uart0 { @@ -129,3 +137,9 @@ &uart16 { pinctrl-0 = <&pinctrl_uart16>; status = "okay"; }; + +&i2c1 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_i2c1>; + status = "okay"; +}; diff --git a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi index e51b98f5bdce..36bd19e37b57 100644 --- a/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi +++ b/arch/arm64/boot/dts/nuvoton/ma35d1.dtsi @@ -17,6 +17,10 @@ / { #address-cells = <2>; #size-cells = <2>; + aliases { + i2c0 = &i2c2; + }; + cpus { #address-cells = <2>; #size-cells = <0>; @@ -372,6 +376,66 @@ uart15: serial@407f0000 { status = "disabled"; }; + i2c1: i2c@40810000 { + compatible = "nuvoton,ma35d1-i2c"; + reg = <0x0 0x40810000 0x0 0x1000>; + interrupts = ; + clocks = <&clk I2C1_GATE>; + clock-frequency = <100000>; + resets = <&sys MA35D1_RESET_I2C1>; + status = "disabled"; + #address-cells = <1>; + #size-cells = <0>; + }; + + i2c2: i2c@40820000 { + compatible = "nuvoton,ma35d1-i2c"; + reg = <0x0 0x40820000 0x0 0x1000>; + interrupts = ; + clocks = <&clk I2C2_GATE>; + clock-frequency = <100000>; + resets = <&sys MA35D1_RESET_I2C2>; + status = "disabled"; + #address-cells = <1>; + #size-cells = <0>; + }; + + i2c3: i2c@40830000 { + compatible = "nuvoton,ma35d1-i2c"; + reg = <0x0 0x40830000 0x0 0x1000>; + interrupts = ; + clocks = <&clk I2C3_GATE>; + clock-frequency = <100000>; + resets = <&sys MA35D1_RESET_I2C3>; + status = "disabled"; + #address-cells = <1>; + #size-cells = <0>; + }; + + i2c4: i2c@40840000 { + compatible = "nuvoton,ma35d1-i2c"; + reg = <0x0 0x40840000 0x0 0x1000>; + interrupts = ; + clocks = <&clk I2C4_GATE>; + clock-frequency = <100000>; + resets = <&sys MA35D1_RESET_I2C4>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + }; + + i2c5: i2c@40850000 { + compatible = "nuvoton,ma35d1-i2c"; + reg = <0x0 0x40850000 0x0 0x1000>; + interrupts = ; + clocks = <&clk I2C5_GATE>; + clock-frequency = <100000>; + resets = <&sys MA35D1_RESET_I2C5>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + }; + uart16: serial@40880000 { compatible = "nuvoton,ma35d1-uart"; reg = <0x0 0x40880000 0x0 0x100>; @@ -379,5 +443,6 @@ uart16: serial@40880000 { clocks = <&clk UART16_GATE>; status = "disabled"; }; + }; }; -- 2.34.1