driver: i2c: Support i2c for Renesas RX MCU

Add initial support for i2c on Renesas RX MCU
This driver is controlling the RIIC HW of RX MCU for i2c bus
interface on Zephyr
Only master mode is supported

Signed-off-by: Duy Nguyen <[email protected]>

Author: duynguyenxa

drivers/i2c/CMakeLists.txt

@@ -56,6 +56,7 @@ zephyr_library_sources_ifdef(CONFIG_I2C_OMAP		i2c_omap.c)
 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_RIIC i2c_renesas_rz_riic.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_RV32M1_LPI2C	i2c_rv32m1_lpi2c.c)
 zephyr_library_sources_ifdef(CONFIG_I2C_SAM0		i2c_sam0.c)

drivers/i2c/Kconfig

@@ -145,6 +145,7 @@ source "drivers/i2c/Kconfig.numaker"
 source "drivers/i2c/Kconfig.omap"
 source "drivers/i2c/Kconfig.rcar"
 source "drivers/i2c/Kconfig.renesas_ra"
+source "drivers/i2c/Kconfig.renesas_rx"
 source "drivers/i2c/Kconfig.renesas_rz"
 source "drivers/i2c/Kconfig.sam0"
 source "drivers/i2c/Kconfig.sam_twihs"

drivers/i2c/Kconfig.renesas_rx

@@ -0,0 +1,20 @@
+# Renesas RX Family
+
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config I2C_RENESAS_RX_RIIC
+	bool "Renesas RX I2C Master"
+	default y
+	depends on DT_HAS_RENESAS_RX_I2C_ENABLED
+	select USE_RX_RDP_I2C
+	select PINCTRL
+	help
+	  Enable Renesas RX I2C Driver.
+
+config I2C_RENESAS_RX_CALLBACK
+	bool "Renesas RX I2C Callback Support"
+	depends on I2C_CALLBACK && I2C_RENESAS_RX_RIIC
+	default y
+	help
+	  Enable Callback support for the I2C Driver