mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 23:33:00 +00:00
185f812c41
Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
// 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 <log.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;
|
|
}
|