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i2c_eeprom: add read and write functions

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Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jonas Karlman 2017-04-22 08:57:41 +00:00 • committed by Simon Glass
parent 26e2e404b7
commit 8880efbd1f
2 changed files with 50 additions and 6 deletions
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32
drivers/misc/i2c_eeprom.c
View file

@ -10,21 +10,41 @@
#include <i2c.h>
#include <i2c_eeprom.h>
static int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
int size)
int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
{
const struct i2c_eeprom_ops *ops = device_get_ops(dev);
if (!ops->read)
return -ENOSYS;
return ops->read(dev, offset, buf, size);
}
int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
{
const struct i2c_eeprom_ops *ops = device_get_ops(dev);
if (!ops->write)
return -ENOSYS;
return ops->write(dev, offset, buf, size);
}
static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
int size)
{
return dm_i2c_read(dev, offset, buf, size);
}
static int i2c_eeprom_write(struct udevice *dev, int offset,
const uint8_t *buf, int size)
static int i2c_eeprom_std_write(struct udevice *dev, int offset,
const uint8_t *buf, int size)
{
return -ENODEV;
}
struct i2c_eeprom_ops i2c_eeprom_std_ops = {
.read = i2c_eeprom_read,
.write = i2c_eeprom_write,
.read = i2c_eeprom_std_read,
.write = i2c_eeprom_std_write,
};
static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)

24
include/i2c_eeprom.h
View file

@ -20,4 +20,28 @@ struct i2c_eeprom {
unsigned pagewidth;
};
/*
* 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, uint8_t *buf, int size);
#endif