[PATCH v2] dts: riscv: spacemit: k3: Add i2c nodes

[Yixun Lan]

Populate all I2C devicetree nodes for SpacemiT K3 SoC. The controller of
i2c3 is reserved for secure domain, and not available from Linux. The
controller of i2c7 simply doesn't exist from hardware perspective, as
vendor directly name the i2c controller used for PMIC as i2c8.

Signed-off-by: Yixun Lan <dlan at kernel.org>
---
This series try to introduce a compatible string for the I2C
controller found in K3 SoC, and add all devicetree nodes .
---
Changes in v2:
- drop compatible binding patch which merged into i2c subsystem
- add comments about why no i2c3 and i2c7
- Link to v1: https://lore.kernel.org/r/20260325-02-k3-i2c-v1-0-78f29c83d9ac@kernel.org
---
 arch/riscv/boot/dts/spacemit/k3.dtsi | 100 +++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k3.dtsi b/arch/riscv/boot/dts/spacemit/k3.dtsi
index a3a8ceddabec..38e6e212fbf2 100644
--- a/arch/riscv/boot/dts/spacemit/k3.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3.dtsi
@@ -438,6 +438,76 @@ soc: soc {
 		dma-noncoherent;
 		ranges;
 
+		i2c0: i2c at d4010800 {
+			compatible = "spacemit,k3-i2c", "spacemit,k1-i2c";
+			reg = <0x0 0xd4010800 0x0 0x38>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <36 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon_apbc CLK_APBC_TWSI0>,
+				 <&syscon_apbc CLK_APBC_TWSI0_BUS>;
+			clock-names = "func", "bus";
+			clock-frequency = <400000>;
+			resets = <&syscon_apbc RESET_APBC_TWSI0>;
+			status = "disabled";
+		};
+
+		i2c1: i2c at d4011000 {
+			compatible = "spacemit,k3-i2c", "spacemit,k1-i2c";
+			reg = <0x0 0xd4011000 0x0 0x38>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <37 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon_apbc CLK_APBC_TWSI1>,
+				 <&syscon_apbc CLK_APBC_TWSI1_BUS>;
+			clock-names = "func", "bus";
+			clock-frequency = <400000>;
+			resets = <&syscon_apbc RESET_APBC_TWSI1>;
+			status = "disabled";
+		};
+
+		i2c2: i2c at d4012000 {
+			compatible = "spacemit,k3-i2c", "spacemit,k1-i2c";
+			reg = <0x0 0xd4012000 0x0 0x38>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <38 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon_apbc CLK_APBC_TWSI2>,
+				 <&syscon_apbc CLK_APBC_TWSI2_BUS>;
+			clock-names = "func", "bus";
+			clock-frequency = <400000>;
+			resets = <&syscon_apbc RESET_APBC_TWSI2>;
+			status = "disabled";
+		};
+
+		i2c4: i2c at d4012800 {
+			compatible = "spacemit,k3-i2c", "spacemit,k1-i2c";
+			reg = <0x0 0xd4012800 0x0 0x38>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <40 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon_apbc CLK_APBC_TWSI4>,
+				 <&syscon_apbc CLK_APBC_TWSI4_BUS>;
+			clock-names = "func", "bus";
+			clock-frequency = <400000>;
+			resets = <&syscon_apbc RESET_APBC_TWSI4>;
+			status = "disabled";
+		};
+
+		i2c5: i2c at d4013800 {
+			compatible = "spacemit,k3-i2c", "spacemit,k1-i2c";
+			reg = <0x0 0xd4013800 0x0 0x38>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <41 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon_apbc CLK_APBC_TWSI5>,
+				 <&syscon_apbc CLK_APBC_TWSI5_BUS>;
+			clock-names = "func", "bus";
+			clock-frequency = <400000>;
+			resets = <&syscon_apbc RESET_APBC_TWSI5>;
+			status = "disabled";
+		};
+
 		syscon_apbc: system-controller at d4015000 {
 			compatible = "spacemit,k3-syscon-apbc";
 			reg = <0x0 0xd4015000 0x0 0x1000>;
@@ -564,6 +634,20 @@ uart9: serial at d4017800 {
 			status = "disabled";
 		};
 
+		i2c6: i2c at d4018800 {
+			compatible = "spacemit,k3-i2c", "spacemit,k1-i2c";
+			reg = <0x0 0xd4018800 0x0 0x38>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <70 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon_apbc CLK_APBC_TWSI6>,
+				 <&syscon_apbc CLK_APBC_TWSI6_BUS>;
+			clock-names = "func", "bus";
+			clock-frequency = <400000>;
+			resets = <&syscon_apbc RESET_APBC_TWSI6>;
+			status = "disabled";
+		};
+
 		gpio: gpio at d4019000 {
 			compatible = "spacemit,k3-gpio";
 			reg = <0x0 0xd4019000 0x0 0x100>;
@@ -582,6 +666,20 @@ gpio: gpio at d4019000 {
 				      <&pinctrl 3 0 96 32>;
 		};
 
+		i2c8: i2c at d401d800 {
+			compatible = "spacemit,k3-i2c", "spacemit,k1-i2c";
+			reg = <0x0 0xd401d800 0x0 0x38>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <19 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&syscon_apbc CLK_APBC_TWSI8>,
+				 <&syscon_apbc CLK_APBC_TWSI8_BUS>;
+			clock-names = "func", "bus";
+			clock-frequency = <400000>;
+			resets = <&syscon_apbc RESET_APBC_TWSI8>;
+			status = "disabled";
+		};
+
 		pinctrl: pinctrl at d401e000 {
 			compatible = "spacemit,k3-pinctrl";
 			reg = <0x0 0xd401e000 0x0 0x1000>;
@@ -677,6 +775,8 @@ clint: timer at e081c000 {
 					      <&cpu7_intc 3>, <&cpu7_intc 7>;
 		};
 
+		/* sec_i2c3: 0xf0614000, not available from Linux */
+
 		mimsic: interrupt-controller at f1000000 {
 			compatible = "spacemit,k3-imsics", "riscv,imsics";
 			reg = <0x0 0xf1000000 0x0 0x10000>;

---
base-commit: d72db7cc40947f208e77fbc6049f2da6ea6822f4
change-id: 20260311-02-k3-i2c-6ad52566a9a3

Best regards,
-- 
Yixun Lan <dlan at kernel.org>