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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.
*/
#include <sys/util.h>
#include "i2c.h"
#include "i2c/i2c.h"
/*
* Initialize device bindings in i2c_devices.
* This macro should be called from within DT_FOREACH_CHILD.
*/
#define INIT_DEV_BINDING(id) \
i2c_devices[I2C_PORT(id)] = DEVICE_DT_GET(DT_PHANDLE(id, i2c_port));
#define INIT_REMOTE_PORTS(id) \
i2c_remote_ports[I2C_PORT(id)] = DT_PROP_OR(id, remote_port, -1);
#define I2C_CONFIG_GPIO(id, type) \
DT_ENUM_UPPER_TOKEN(DT_CHILD(DT_CHILD(id, config), type), enum_name)
#define I2C_PORT_INIT(id) \
{ \
.name = DT_LABEL(id), \
.port = I2C_PORT(id), \
},
/*
* Long term we will not need these, for now they're needed to get things to
* build since these extern symbols are usually defined in
* board/${BOARD}/board.c.
*
* Since all the ports will eventually be handled by device tree. This will
* be removed at that point.
*/
const struct i2c_port_t i2c_ports[] = {
#if DT_NODE_EXISTS(DT_PATH(named_i2c_ports))
DT_FOREACH_CHILD(DT_PATH(named_i2c_ports), I2C_PORT_INIT)
#endif
};
const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
static int i2c_remote_ports[I2C_PORT_COUNT];
int i2c_get_line_levels(int port)
{
return I2C_LINE_IDLE;
}
static const struct device *i2c_devices[I2C_PORT_COUNT];
static int init_device_bindings(const struct device *device)
{
ARG_UNUSED(device);
DT_FOREACH_CHILD(DT_PATH(named_i2c_ports), INIT_DEV_BINDING)
DT_FOREACH_CHILD(DT_PATH(named_i2c_ports), INIT_REMOTE_PORTS)
return 0;
}
SYS_INIT(init_device_bindings, POST_KERNEL, 51);
const struct device *i2c_get_device_for_port(const int port)
{
if (port < 0 || port >= I2C_PORT_COUNT)
return NULL;
return i2c_devices[port];
}
int i2c_get_port_from_remote_port(int remote_port)
{
for (int port = 0; port < I2C_PORT_COUNT; port++) {
if (i2c_remote_ports[port] == remote_port)
return port;
}
/* Remote port is not defined, return -1 to signal the problem */
return -1;
}
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