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misc: i2c_eeprom: add eeprom write support

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Write up to page size in each i2c transfer.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Baruch Siach 2019-04-07 12:38:49 +03:00 committed by Heiko Schocher
parent a29034d1e6
commit 84c80c63d5
1 changed files with 19 additions and 1 deletions
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20
drivers/misc/i2c_eeprom.c
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@ -5,6 +5,7 @@
#include <common.h> #include <common.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/kernel.h>
#include <dm.h> #include <dm.h>
#include <i2c.h> #include <i2c.h>
#include <i2c_eeprom.h> #include <i2c_eeprom.h>
@ -38,7 +39,24 @@ static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
static int i2c_eeprom_std_write(struct udevice *dev, int offset, static int i2c_eeprom_std_write(struct udevice *dev, int offset,
const uint8_t *buf, int size) const uint8_t *buf, int size)
{ {
return -ENODEV; struct i2c_eeprom *priv = dev_get_priv(dev);
int ret;
while (size > 0) {
int write_size = min_t(int, size, priv->pagesize);
ret = dm_i2c_write(dev, offset, buf, write_size);
if (ret)
return ret;
offset += write_size;
buf += write_size;
size -= write_size;
udelay(10000);
}
return 0;
} }
static const struct i2c_eeprom_ops i2c_eeprom_std_ops = { static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {