include/i2c_eeprom.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (c) 2014 Google, Inc
   4  */
   5
   6 #ifndef __I2C_EEPROM
   7 #define __I2C_EEPROM
   8
   9 struct i2c_eeprom_ops {
  10         int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
  11         int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
  12                      int size);
  13 };
  14
  15 struct i2c_eeprom {
  16         /* The EEPROM's page size in byte */
  17         unsigned long pagesize;
  18         /* The EEPROM's page width in bits (pagesize = 2^pagewidth) */
  19         unsigned pagewidth;
  20 };
  21
  22 /*
  23  * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
  24  *
  25  * @dev:        Chip to read from
  26  * @offset:     Offset within chip to start reading
  27  * @buf:        Place to put data
  28  * @size:       Number of bytes to read
  29  *
  30  * @return 0 on success, -ve on failure
  31  */
  32 int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
  33
  34 /*
  35  * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
  36  *
  37  * @dev:        Chip to write to
  38  * @offset:     Offset within chip to start writing
  39  * @buf:        Buffer containing data to write
  40  * @size:       Number of bytes to write
  41  *
  42  * @return 0 on success, -ve on failure
  43  */
  44 int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size);
  45
  46 #endif