1 // SPDX-License-Identifier: GPL-2.0
3 * maxim_codec.c -- MAXIM CODEC Common driver
5 * Copyright 2011 Maxim Integrated Products
15 #include "maxim_codec.h"
18 * Writes value to a device register through i2c
20 * @param priv Private data for driver
21 * @param reg reg number to be write
22 * @param data data to be writen to the above registor
24 * @return int value 1 for change, 0 for no change or negative error code.
26 int maxim_i2c_write(struct maxim_priv *priv, unsigned int reg,
29 debug("%s: Write Addr : 0x%02X, Data : 0x%02X\n",
31 return dm_i2c_write(priv->dev, reg, &data, 1);
35 * Read a value from a device register through i2c
37 * @param priv Private data for driver
38 * @param reg reg number to be read
39 * @param data address of read data to be stored
41 * @return int value 0 for success, -1 in case of error.
43 unsigned int maxim_i2c_read(struct maxim_priv *priv, unsigned int reg,
48 return dm_i2c_read(priv->dev, reg, data, 1);
50 debug("%s: Error while reading register %#04x\n",
59 * update device register bits through i2c
61 * @param priv Private data for driver
62 * @param reg codec register
63 * @param mask register mask
64 * @param value new value
66 * @return int value 0 for success, non-zero error code.
68 int maxim_bic_or(struct maxim_priv *priv, unsigned int reg, unsigned char mask,
72 unsigned char old, new;
74 if (maxim_i2c_read(priv, reg, &old) != 0)
76 new = (old & ~mask) | (value & mask);
77 change = (old != new) ? 1 : 0;
79 ret = maxim_i2c_write(priv, reg, new);