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42f477f0ab
Add some fallback functions for when i2c_eeprom is disabled. This allows code to reference i2c_eeprom_* functions without needing to check whether support has been compiled in. Signed-off-by: Sean Anderson <sean.anderson@seco.com>
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2014 Google, Inc
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*/
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#ifndef __I2C_EEPROM
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#define __I2C_EEPROM
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struct udevice;
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struct i2c_eeprom_ops {
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int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
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int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
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int size);
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int (*size)(struct udevice *dev);
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};
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struct i2c_eeprom {
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/* The EEPROM's page size in byte */
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unsigned long pagesize;
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/* The EEPROM's capacity in bytes */
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unsigned long size;
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};
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#if CONFIG_IS_ENABLED(I2C_EEPROM)
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/*
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* i2c_eeprom_read() - read bytes from an I2C EEPROM chip
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*
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* @dev: Chip to read from
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* @offset: Offset within chip to start reading
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* @buf: Place to put data
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* @size: Number of bytes to read
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*
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* Return: 0 on success, -ve on failure
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*/
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int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
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/*
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* i2c_eeprom_write() - write bytes to an I2C EEPROM chip
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*
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* @dev: Chip to write to
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* @offset: Offset within chip to start writing
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* @buf: Buffer containing data to write
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* @size: Number of bytes to write
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*
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* Return: 0 on success, -ve on failure
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*/
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int i2c_eeprom_write(struct udevice *dev, int offset, const uint8_t *buf,
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int size);
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/*
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* i2c_eeprom_size() - get size of I2C EEPROM chip
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*
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* @dev: Chip to query
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*
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* Return: +ve size in bytes on success, -ve on failure
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*/
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int i2c_eeprom_size(struct udevice *dev);
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#else /* !I2C_EEPROM */
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static inline int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
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int size)
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{
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return -ENOSYS;
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}
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static inline int i2c_eeprom_write(struct udevice *dev, int offset,
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const uint8_t *buf, int size)
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{
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return -ENOSYS;
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}
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static inline int i2c_eeprom_size(struct udevice *dev)
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{
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return -ENOSYS;
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}
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#endif /* I2C_EEPROM */
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#endif
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