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/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <device/device.h>
#include <device/smbus.h>
static void i2cmux_set_link(struct device *dev, unsigned int link)
{
if (dev->enabled && dev->path.type == DEVICE_PATH_I2C) {
if (ops_smbus_bus(get_pbus_smbus(dev))) {
smbus_write_byte(dev, 0x01, 1 << link); // output value
smbus_write_byte(dev, 0x03, 0); // all output
}
}
}
static struct device_operations i2cmux_operations = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
.init = DEVICE_NOOP,
.scan_bus = scan_smbus,
.set_link = i2cmux_set_link,
};
static void enable_dev(struct device *dev)
{
if (dev->link_list != NULL)
dev->ops = &i2cmux_operations;
}
struct chip_operations drivers_i2c_i2cmux_ops = {
CHIP_NAME("i2cmux")
.enable_dev = enable_dev,
};
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