99f83bbad4
As discussed on the mailing list and voted upon, the coreboot project is going to move the majority of copyrights out of the headers and into an AUTHORS file. This will happen a bit at a time, as we'll be unifying license headers at the same time. Additional cleanup - Unify "Inc" to "Inc." and "LLC." to "LLC" Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: Ie03a3ce1f6085494bd5f38da76e2467970cf301a Reviewed-on: https://review.coreboot.org/c/coreboot/+/35430 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <device/i2c_simple.h>
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#include <stdint.h>
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int i2c_read_field(unsigned bus, uint8_t chip, uint8_t reg, uint8_t *data,
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uint8_t mask, uint8_t shift)
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{
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int ret;
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uint8_t buf = 0;
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ret = i2c_readb(bus, chip, reg, &buf);
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buf &= (mask << shift);
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*data = (buf >> shift);
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return ret;
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}
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int i2c_write_field(unsigned bus, uint8_t chip, uint8_t reg, uint8_t data,
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uint8_t mask, uint8_t shift)
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{
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int ret;
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uint8_t buf = 0;
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ret = i2c_readb(bus, chip, reg, &buf);
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buf &= ~(mask << shift);
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buf |= (data << shift);
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ret |= i2c_writeb(bus, chip, reg, buf);
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return ret;
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}
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