cros_ec_tunnel.c
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/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <cros_ec.h>
#include <errno.h>
#include <i2c.h>
DECLARE_GLOBAL_DATA_PTR;
struct cros_ec_i2c_bus {
int remote_bus;
};
static int cros_ec_i2c_set_bus_speed(struct udevice *dev, unsigned int speed)
{
return 0;
}
static int cros_ec_i2c_xfer(struct udevice *dev, struct i2c_msg *msg,
int nmsgs)
{
struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev);
return cros_ec_i2c_tunnel(dev->parent, i2c_bus->remote_bus, msg, nmsgs);
}
static int cros_ec_i2c_ofdata_to_platdata(struct udevice *dev)
{
struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev);
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
i2c_bus->remote_bus = fdtdec_get_uint(blob, node, "google,remote-bus",
0);
return 0;
}
static const struct dm_i2c_ops cros_ec_i2c_ops = {
.xfer = cros_ec_i2c_xfer,
.set_bus_speed = cros_ec_i2c_set_bus_speed,
};
static const struct udevice_id cros_ec_i2c_ids[] = {
{ .compatible = "google,cros-ec-i2c-tunnel" },
{ }
};
U_BOOT_DRIVER(cros_ec_tunnel) = {
.name = "cros_ec_tunnel",
.id = UCLASS_I2C,
.of_match = cros_ec_i2c_ids,
.ofdata_to_platdata = cros_ec_i2c_ofdata_to_platdata,
.priv_auto_alloc_size = sizeof(struct cros_ec_i2c_bus),
.ops = &cros_ec_i2c_ops,
};