mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
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>
81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (c) 2014 Google, Inc
|
|
*/
|
|
|
|
#ifndef __I2C_EEPROM
|
|
#define __I2C_EEPROM
|
|
|
|
struct udevice;
|
|
|
|
struct i2c_eeprom_ops {
|
|
int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
|
|
int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
|
|
int size);
|
|
int (*size)(struct udevice *dev);
|
|
};
|
|
|
|
struct i2c_eeprom {
|
|
/* The EEPROM's page size in byte */
|
|
unsigned long pagesize;
|
|
/* The EEPROM's capacity in bytes */
|
|
unsigned long size;
|
|
};
|
|
|
|
#if CONFIG_IS_ENABLED(I2C_EEPROM)
|
|
/*
|
|
* i2c_eeprom_read() - read bytes from an I2C EEPROM chip
|
|
*
|
|
* @dev: Chip to read from
|
|
* @offset: Offset within chip to start reading
|
|
* @buf: Place to put data
|
|
* @size: Number of bytes to read
|
|
*
|
|
* Return: 0 on success, -ve on failure
|
|
*/
|
|
int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
|
|
|
|
/*
|
|
* i2c_eeprom_write() - write bytes to an I2C EEPROM chip
|
|
*
|
|
* @dev: Chip to write to
|
|
* @offset: Offset within chip to start writing
|
|
* @buf: Buffer containing data to write
|
|
* @size: Number of bytes to write
|
|
*
|
|
* Return: 0 on success, -ve on failure
|
|
*/
|
|
int i2c_eeprom_write(struct udevice *dev, int offset, const uint8_t *buf,
|
|
int size);
|
|
|
|
/*
|
|
* i2c_eeprom_size() - get size of I2C EEPROM chip
|
|
*
|
|
* @dev: Chip to query
|
|
*
|
|
* Return: +ve size in bytes on success, -ve on failure
|
|
*/
|
|
int i2c_eeprom_size(struct udevice *dev);
|
|
|
|
#else /* !I2C_EEPROM */
|
|
|
|
static inline int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
|
|
int size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int i2c_eeprom_write(struct udevice *dev, int offset,
|
|
const uint8_t *buf, int size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int i2c_eeprom_size(struct udevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
#endif /* I2C_EEPROM */
|
|
|
|
#endif
|