11  * @brief Nuvoton NPCX smb/i2c port driver
13  * This file contains the driver of SMBus/I2C buses (ports) which provides
14  * pin-muxing for each i2c io-pads. In order to support "SMBus Multi-Bus"
16  * between Zephyr i2c api functions and i2c controller driver which provides
17  * full support for SMBus/I2C transactions.
23  *           SDA_N Port 0----|  |----|   SMB/I2C    |
33 #include <zephyr/drivers/i2c.h>
35 #include <zephyr/dt-bindings/i2c/i2c.h>
42 #include "i2c-priv.h"
53 /* I2C api functions */
60 		LOG_ERR("Cannot find i2c controller on port%02x!",  in i2c_npcx_port_configure()
73 	/* Configure i2c controller */  in i2c_npcx_port_configure()
84 		LOG_ERR("Cannot find i2c controller on port%02x!", config->port);  in i2c_npcx_port_get_config()
105 		LOG_ERR("Cannot find i2c controller on port%02x!",  in i2c_npcx_port_transfer()
110 	/* Lock mutex of i2c/smb controller */  in i2c_npcx_port_transfer()
113 	/* Switch correct port for i2c controller first */  in i2c_npcx_port_transfer()
116 	/* Start transaction with i2c controller */  in i2c_npcx_port_transfer()
120 	/* Unlock mutex of i2c/smb controller */  in i2c_npcx_port_transfer()
131 		LOG_ERR("Cannot find i2c controller on port%02x!", config->port);  in i2c_npcx_port_recover_bus()
135 	/* Lock mutex of i2c/smb controller */  in i2c_npcx_port_recover_bus()
140 	/* Unlock mutex of i2c/smb controller */  in i2c_npcx_port_recover_bus()
157 		LOG_ERR("Cannot find i2c controller on port%02x!", config->port);  in i2c_npcx_target_register()
170 		LOG_ERR("Cannot find i2c controller on port%02x!", config->port);  in i2c_npcx_target_unregister()
178 /* I2C driver registration */
185 	/* Configure pin-mux for I2C device */  in i2c_npcx_port_init()
188 		LOG_ERR("I2C pinctrl setup failed (%d)", ret);  in i2c_npcx_port_init()
193 	/* Setup initial i2c configuration */  in i2c_npcx_port_init()
203 static DEVICE_API(i2c, i2c_port_npcx_driver_api) = {
217 /* I2C port init macro functions */