1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * 4 * Read EEPROM data 5 * (C) Copyright 2024 Siemens AG 6 */ 7 8#include <dm/uclass.h> 9#include <i2c.h> 10#include "eeprom.h" 11 12#if CONFIG_IS_ENABLED(DM_I2C) 13static struct udevice *i2c_dev; 14#endif 15 16/* Probe I2C and set-up EEPROM */ 17int siemens_ee_setup(void) 18{ 19#if CONFIG_IS_ENABLED(DM_I2C) 20 struct udevice *bus; 21 int ret; 22 23 ret = uclass_get_device_by_seq(UCLASS_I2C, SIEMENS_EE_I2C_BUS, &bus); 24 if (ret) 25 goto err; 26 27 ret = dm_i2c_probe(bus, SIEMENS_EE_I2C_ADDR, 0, &i2c_dev); 28 if (ret) 29 goto err; 30 if (i2c_set_chip_offset_len(i2c_dev, 2)) 31 goto err; 32#else 33 i2c_set_bus_num(SIEMENS_EE_I2C_BUS); 34 if (i2c_probe(SIEMENS_EE_I2C_ADDR)) 35 goto err; 36#endif 37 return 0; 38 39err: 40 printf("Could not probe the EEPROM; something fundamentally wrong on the I2C bus.\n"); 41 return 1; 42} 43 44/* Read data from EEPROM */ 45int siemens_ee_read_data(uint address, uchar *buffer, int len) 46{ 47#if CONFIG_IS_ENABLED(DM_I2C) 48 return dm_i2c_read(i2c_dev, address, buffer, len); 49#else 50 return i2c_read(SIEMENS_EE_I2C_ADDR, address, 2, buffer, len); 51#endif 52} 53