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/* Copyright 2020 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "i2c.h"
#include "tca6416a.h"
int tca6416a_write_bit(int port, enum tca6416a_bank bank, uint8_t bit, int val)
{
int tmp;
int ret;
/* Read output port register */
ret = i2c_read8(port, TCA6416A_ADDR_FLAGS, bank, &tmp);
if (ret != EC_SUCCESS)
return ret;
if (val)
tmp |= BIT(bit);
else
tmp &= ~BIT(bit);
/* Write back modified output port register */
ret = i2c_write8(port, TCA6416A_ADDR_FLAGS, bank, tmp);
if (ret != EC_SUCCESS)
return ret;
return EC_SUCCESS;
}
int tca6416a_write_byte(int port, enum tca6416a_bank bank, uint8_t val)
{
int ret;
ret = i2c_write8(port, TCA6416A_ADDR_FLAGS, bank, val);
if (ret != EC_SUCCESS)
return ret;
return EC_SUCCESS;
}
int tca6416a_read_byte(int port, enum tca6416a_bank bank)
{
int tmp;
if (i2c_read8(port, TCA6416A_ADDR_FLAGS, bank, &tmp) != EC_SUCCESS)
return -1;
return tmp;
}
int tca6416a_read_bit(int port, enum tca6416a_bank bank, uint8_t bit)
{
int tmp;
int mask = 1 << bit;
/* Read input port register */
if (i2c_read8(port, TCA6416A_ADDR_FLAGS, bank, &tmp) != EC_SUCCESS)
return -1;
return (tmp & mask) >> bit;
}
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