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// SPDX-License-Identifier: GPL-2.0+
/*
*
* Read EEPROM data
* (C) Copyright 2024 Siemens AG
*/
#include <dm/uclass.h>
#include <i2c.h>
#include "eeprom.h"
#if CONFIG_IS_ENABLED(DM_I2C)
static struct udevice *i2c_dev;
#endif
/* Probe I2C and set-up EEPROM */
int siemens_ee_setup(void)
{
#if CONFIG_IS_ENABLED(DM_I2C)
struct udevice *bus;
int ret;
ret = uclass_get_device_by_seq(UCLASS_I2C, SIEMENS_EE_I2C_BUS, &bus);
if (ret)
goto err;
ret = dm_i2c_probe(bus, SIEMENS_EE_I2C_ADDR, 0, &i2c_dev);
if (ret)
goto err;
if (i2c_set_chip_offset_len(i2c_dev, 2))
goto err;
#else
i2c_set_bus_num(SIEMENS_EE_I2C_BUS);
if (i2c_probe(SIEMENS_EE_I2C_ADDR))
goto err;
#endif
return 0;
err:
printf("Could not probe the EEPROM; something fundamentally wrong on the I2C bus.\n");
return 1;
}
/* Read data from EEPROM */
int siemens_ee_read_data(uint address, uchar *buffer, int len)
{
#if CONFIG_IS_ENABLED(DM_I2C)
return dm_i2c_read(i2c_dev, address, buffer, len);
#else
return i2c_read(SIEMENS_EE_I2C_ADDR, address, 2, buffer, len);
#endif
}
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