77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* Copyright (c) 2020 Nuvoton Technology Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_DRIVERS_I2C_I2C_NPCX_CONTROLLER_H_
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#define ZEPHYR_DRIVERS_I2C_I2C_NPCX_CONTROLLER_H_
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#include <zephyr/device.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Lock the mutex of npcx i2c controller.
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*
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* @param i2c_dev Pointer to the device structure for i2c controller instance.
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*/
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void npcx_i2c_ctrl_mutex_lock(const struct device *i2c_dev);
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/**
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* @brief Unlock the mutex of npcx i2c controller.
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*
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* @param i2c_dev Pointer to the device structure for i2c controller instance.
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*/
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void npcx_i2c_ctrl_mutex_unlock(const struct device *i2c_dev);
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/**
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* @brief Configure operation of a npcx i2c controller.
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*
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* @param i2c_dev Pointer to the device structure for i2c controller instance.
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* @param dev_config Bit-packed 32-bit value to the device runtime configuration
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* for the I2C controller.
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*
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* @retval 0 If successful.
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* @retval -EIO General input / output error, failed to configure device.
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* @retval -ERANGE Out of supported i2c frequency.
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*/
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int npcx_i2c_ctrl_configure(const struct device *i2c_dev, uint32_t dev_config);
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/**
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* @brief Get I2C controller speed.
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*
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* @param i2c_dev Pointer to the device structure for i2c controller instance.
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* @param speed Pointer to store the I2C speed.
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*
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* @retval 0 If successful.
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* @retval -ERANGE Stored I2C frequency out of supported range.
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* @retval -EIO Controller is not configured.
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*/
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int npcx_i2c_ctrl_get_speed(const struct device *i2c_dev, uint32_t *speed);
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/**
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* @brief Perform data transfer to via npcx i2c controller.
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*
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* @param i2c_dev Pointer to the device structure for i2c controller instance.
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* @param msgs Array of messages to transfer.
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* @param num_msgs Number of messages to transfer.
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* @param addr Address of the I2C target device.
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* @param port Port index of selected i2c port.
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*
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* @retval 0 If successful.
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* @retval -EIO General input / output error.
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* @retval -ENXIO No slave address match.
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* @retval -ETIMEDOUT Timeout occurred for a i2c transaction.
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*/
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int npcx_i2c_ctrl_transfer(const struct device *i2c_dev, struct i2c_msg *msgs,
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uint8_t num_msgs, uint16_t addr, uint8_t port);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_DRIVERS_I2C_I2C_NPCX_CONTROLLER_H_ */
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