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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 <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;
- }
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