zephyrproject-rtos · nhutnguyenkc · Jul 22, 2025 · Jul 22, 2025 · Jul 22, 2025 · Jul 22, 2025
diff --git a/boards/renesas/rza3ul_smarc/rza3ul_smarc-pinctrl.dtsi b/boards/renesas/rza3ul_smarc/rza3ul_smarc-pinctrl.dtsi
@@ -27,4 +27,11 @@
 			pinmux = <RZA_PINMUX(PORT_04, 2, 4)>; /* MTIOCA */
 		};
 	};
+
+	/omit-if-no-ref/ i2c1_pins: i2c1 {
+		i2c1-spins {
+			pins = <BSP_IO_RIIC1_SDA>, <BSP_IO_RIIC1_SCL>;
+			input-enable;
+		};
+	};
 };
diff --git a/boards/renesas/rza3ul_smarc/rza3ul_smarc.dts b/boards/renesas/rza3ul_smarc/rza3ul_smarc.dts
@@ -71,3 +71,9 @@
 &adc {
 	status = "okay";
 };
+
+&i2c1 {
+	pinctrl-0 = <&i2c1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
diff --git a/boards/renesas/rza3ul_smarc/rza3ul_smarc.yaml b/boards/renesas/rza3ul_smarc/rza3ul_smarc.yaml
@@ -10,6 +10,7 @@ supported:
   - gpio
   - pwm
   - adc
+  - i2c
 testing:
   ignore_tags:
     - bluetooth
diff --git a/boards/renesas/rzn2l_rsk/rzn2l_rsk-pinctrl.dtsi b/boards/renesas/rzn2l_rsk/rzn2l_rsk-pinctrl.dtsi
@@ -41,4 +41,11 @@
 				 <RZN_PINMUX(PORT_04, 0, 3)>; /* GTIOCB */
 		};
 	};
+
+	/omit-if-no-ref/ i2c1_default: i2c1_default {
+		i2c1-pinmux {
+			pinmux = <RZN_PINMUX(PORT_05, 2, 8)>, /* SCL */
+				 <RZN_PINMUX(PORT_05, 3, 9)>; /* SDA */
+		};
+	};
 };
diff --git a/boards/renesas/rzn2l_rsk/rzn2l_rsk.dts b/boards/renesas/rzn2l_rsk/rzn2l_rsk.dts
@@ -117,3 +117,9 @@
 &adc1 {
 	status = "okay";
 };
+
+&i2c1 {
+	pinctrl-0 = <&i2c1_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
diff --git a/boards/renesas/rzn2l_rsk/rzn2l_rsk.yaml b/boards/renesas/rzn2l_rsk/rzn2l_rsk.yaml
@@ -9,4 +9,5 @@ supported:
   - gpio
   - pwm
   - adc
+  - i2c
 vendor: renesas
diff --git a/boards/renesas/rzt2m_rsk/rzt2m_rsk-pinctrl.dtsi b/boards/renesas/rzt2m_rsk/rzt2m_rsk-pinctrl.dtsi
@@ -33,4 +33,11 @@
 				 <RZT_PINMUX(PORT_03, 6, 5)>; /* GTIOCB */
 		};
 	};
+
+	/omit-if-no-ref/ i2c1_default: i2c1_default {
+		i2c1-pinmux {
+			pinmux = <RZT_PINMUX(PORT_22, 6, 2)>, /* SCL */
+				 <RZT_PINMUX(PORT_22, 7, 2)>; /* SDA */
+		};
+	};
 };
diff --git a/boards/renesas/rzt2m_rsk/rzt2m_rsk_r9a07g075m24gbg_cr520.dts b/boards/renesas/rzt2m_rsk/rzt2m_rsk_r9a07g075m24gbg_cr520.dts
@@ -86,6 +86,12 @@
 	status = "okay";
 };
 
+&i2c1 {
+	pinctrl-0 = <&i2c1_default>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &gpio10 {
 	irqs = <5 2>;
 	status = "okay";

diff --git a/boards/renesas/rzt2m_rsk/rzt2m_rsk_r9a07g075m24gbg_cr520.yaml b/boards/renesas/rzt2m_rsk/rzt2m_rsk_r9a07g075m24gbg_cr520.yaml
@@ -14,4 +14,5 @@ supported:
   - gpio
   - pwm
   - adc
+  - i2c
 vendor: renesas
diff --git a/boards/renesas/rzv2l_smarc/rzv2l_smarc-pinctrl.dtsi b/boards/renesas/rzv2l_smarc/rzv2l_smarc-pinctrl.dtsi
@@ -25,4 +25,11 @@
 			pinmux = <RZV_PINMUX(PORT_41, 0, 2)>; /* GTIOCA */
 		};
 	};
+
+	/omit-if-no-ref/ i2c3_pins: i2c3 {
+		i2c3-pinmux {
+			pinmux = <RZV_PINMUX(PORT_18, 0, 3)>, /* SDA */
+				 <RZV_PINMUX(PORT_18, 1, 3)>; /* SCL */
+		};
+	};
 };
diff --git a/boards/renesas/rzv2l_smarc/rzv2l_smarc_r9a07g054l23gbg_cm33.dts b/boards/renesas/rzv2l_smarc/rzv2l_smarc_r9a07g054l23gbg_cm33.dts
@@ -37,3 +37,9 @@
 &adc {
 	status = "okay";
 };
+
+&i2c3 {
+	pinctrl-0 = <&i2c3_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
diff --git a/boards/renesas/rzv2l_smarc/rzv2l_smarc_r9a07g054l23gbg_cm33.yaml b/boards/renesas/rzv2l_smarc/rzv2l_smarc_r9a07g054l23gbg_cm33.yaml
@@ -10,4 +10,5 @@ supported:
   - gpio
   - pwm
   - adc
+  - i2c
 vendor: renesas
diff --git a/drivers/i2c/CMakeLists.txt b/drivers/i2c/CMakeLists.txt
@@ -57,6 +57,7 @@ zephyr_library_sources_ifdef(CONFIG_I2C_RCAR		i2c_rcar.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_RENESAS_RA_IIC	i2c_renesas_ra_iic.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_RENESAS_RA_SCI_B	i2c_renesas_ra_sci_b.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_RENESAS_RX_RIIC i2c_renesas_rx_riic.c)
+zephyr_library_sources_ifdef(CONFIG_I2C_RENESAS_RZ_IIC i2c_renesas_rz_riic.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_RENESAS_RZ_RIIC i2c_renesas_rz_riic.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_RTS5912		i2c_realtek_rts5912.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_RV32M1_LPI2C	i2c_rv32m1_lpi2c.c)

diff --git a/drivers/i2c/Kconfig.renesas_rz b/drivers/i2c/Kconfig.renesas_rz
@@ -1,10 +1,20 @@
-# Copyright (c) 2024 Renesas Electronics Corporation
+# Copyright (c) 2024-2025 Renesas Electronics Corporation
 # SPDX-License-Identifier: Apache-2.0
 
 config I2C_RENESAS_RZ_RIIC
 	bool "Renesas RZ I2C RIIC Master"
 	default y
 	depends on DT_HAS_RENESAS_RZ_RIIC_ENABLED
 	select USE_RZ_FSP_RIIC_MASTER
+	select PINCTRL
 	help
 	  Enable Renesas RZ I2C RIIC Driver.
+
+config I2C_RENESAS_RZ_IIC
+	bool "Renesas RZ I2C IIC Master"
+	default y
+	depends on DT_HAS_RENESAS_RZ_IIC_ENABLED
+	select USE_RZ_FSP_IIC_MASTER
+	select PINCTRL
+	help
+	  Enable Renesas RZ I2C IIC Driver.
-Original file line number
+Diff line change
@@ Expand Up / @@ -9,4 +9,5 @@ supported: @@
       - gpio
       - pwm
       - adc
+      - i2c
     vendor: renesas