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         int (*size)(struct udevice *dev);
  14 };
  15
  16 struct i2c_eeprom {
  17         /* The EEPROM's page size in byte */
  18         unsigned long pagesize;
  19         /* The EEPROM's capacity in bytes */
  20         unsigned long size;
  21 };
  22
  23 /*
  24  * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
  25  *
  26  * @dev:        Chip to read from
  27  * @offset:     Offset within chip to start reading
  28  * @buf:        Place to put data
  29  * @size:       Number of bytes to read
  30  *
  31  * @return 0 on success, -ve on failure
  32  */
  33 int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
  34
  35 /*
  36  * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
  37  *
  38  * @dev:        Chip to write to
  39  * @offset:     Offset within chip to start writing
  40  * @buf:        Buffer containing data to write
  41  * @size:       Number of bytes to write
  42  *
  43  * @return 0 on success, -ve on failure
  44  */
  45 int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size);
  46
  47 /*
  48  * i2c_eeprom_size() - get size of I2C EEPROM chip
  49  *
  50  * @dev:        Chip to query
  51  *
  52  * @return +ve size in bytes on success, -ve on failure
  53  */
  54 int i2c_eeprom_size(struct udevice *dev);
  55
  56 #endif