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/* Copyright 2020 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef ZEPHYR_CHROME_I2C_I2C_H
#define ZEPHYR_CHROME_I2C_I2C_H
#include <device.h>
#include <devicetree.h>
#ifdef CONFIG_PLATFORM_EC_I2C
#if DT_NODE_EXISTS(DT_PATH(named_i2c_ports))
#define I2C_PORT(id) DT_STRING_UPPER_TOKEN(id, enum_name)
#define I2C_PORT_WITH_COMMA(id) I2C_PORT(id),
enum i2c_ports {
DT_FOREACH_CHILD(DT_PATH(named_i2c_ports), I2C_PORT_WITH_COMMA)
I2C_PORT_COUNT
};
#define NAMED_I2C(name) I2C_PORT(DT_PATH(named_i2c_ports, name))
#endif /* named_i2c_ports */
#endif /* CONFIG_PLATFORM_EC_I2C */
/**
* @brief Adaptation of platform/ec's port IDs which map a port/bus to a device.
*
* This function should be implemented per chip and should map the enum value
* defined for the chip for encoding each valid port/bus combination. For
* example, the npcx chip defines the port/bus combinations NPCX_I2C_PORT* under
* chip/npcx/registers-npcx7.h.
*
* Thus, the npcx shim should implement this function to map the enum values
* to the correct devicetree device.
*
* @param port The port to get the device for.
* @return Pointer to the device struct or {@code NULL} if none are available.
*/
const struct device *i2c_get_device_for_port(const int port);
/**
* @brief Get a port number for a received remote port number.
*
* This function translate a received port number via the I2C_PASSTHRU host
* command to a port number used in ZephyrEC based on remote_port property in
* dts. The first port which matches the remote port number is returned.
*
* @param port The received remote port.
* @return Port number used in EC. -1 if the remote port is not defined
*/
int i2c_get_port_from_remote_port(int remote_port);
#endif /* ZEPHYR_CHROME_I2C_I2C_H */
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