maxim_codec.c
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// SPDX-License-Identifier: GPL-2.0
/*
* maxim_codec.c -- MAXIM CODEC Common driver
*
* Copyright 2011 Maxim Integrated Products
*/
#include <common.h>
#include <div64.h>
#include <i2c.h>
#include <i2s.h>
#include <sound.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include "maxim_codec.h"
/*
* Writes value to a device register through i2c
*
* @param priv Private data for driver
* @param reg reg number to be write
* @param data data to be writen to the above registor
*
* @return int value 1 for change, 0 for no change or negative error code.
*/
int maxim_i2c_write(struct maxim_priv *priv, unsigned int reg,
unsigned char data)
{
debug("%s: Write Addr : 0x%02X, Data : 0x%02X\n",
__func__, reg, data);
return dm_i2c_write(priv->dev, reg, &data, 1);
}
/*
* Read a value from a device register through i2c
*
* @param priv Private data for driver
* @param reg reg number to be read
* @param data address of read data to be stored
*
* @return int value 0 for success, -1 in case of error.
*/
unsigned int maxim_i2c_read(struct maxim_priv *priv, unsigned int reg,
unsigned char *data)
{
int ret;
return dm_i2c_read(priv->dev, reg, data, 1);
if (ret != 0) {
debug("%s: Error while reading register %#04x\n",
__func__, reg);
return -1;
}
return 0;
}
/*
* update device register bits through i2c
*
* @param priv Private data for driver
* @param reg codec register
* @param mask register mask
* @param value new value
*
* @return int value 0 for success, non-zero error code.
*/
int maxim_bic_or(struct maxim_priv *priv, unsigned int reg, unsigned char mask,
unsigned char value)
{
int change, ret = 0;
unsigned char old, new;
if (maxim_i2c_read(priv, reg, &old) != 0)
return -1;
new = (old & ~mask) | (value & mask);
change = (old != new) ? 1 : 0;
if (change)
ret = maxim_i2c_write(priv, reg, new);
if (ret < 0)
return ret;
return change;
}