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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/i2c_simple.h>
#include <stdint.h>
int i2c_read_field(unsigned bus, uint8_t chip, uint8_t reg, uint8_t *data,
uint8_t mask, uint8_t shift)
{
int ret;
uint8_t buf = 0;
ret = i2c_readb(bus, chip, reg, &buf);
buf &= (mask << shift);
*data = (buf >> shift);
return ret;
}
int i2c_write_field(unsigned bus, uint8_t chip, uint8_t reg, uint8_t data,
uint8_t mask, uint8_t shift)
{
int ret;
uint8_t buf = 0;
ret = i2c_readb(bus, chip, reg, &buf);
buf &= ~(mask << shift);
buf |= (data << shift);
ret |= i2c_writeb(bus, chip, reg, buf);
return ret;
}
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