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drivers/i2c/i2cmux: Drop unused i2c multiplex

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There is no documentation what hardware this was compatible
with.

Change-Id: Ie8832f1d7f4ca2bc8121f84b1ee564403cc69026
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38159
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Kyösti Mälkki 2020-01-03 10:15:03 +02:00
parent 8a20edc861
commit 3f56ad9f72
3 changed files with 0 additions and 48 deletions
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2
src/drivers/i2c/i2cmux/Kconfig
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config DRIVERS_I2C_I2CMUX
bool

1
src/drivers/i2c/i2cmux/Makefile.inc
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ramstage-$(CONFIG_DRIVERS_I2C_I2CMUX) += i2cmux.c

45
src/drivers/i2c/i2cmux/i2cmux.c
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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,
};