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)
13 static struct udevice *i2c_dev;
14 #endif
15
16 /* Probe I2C and set-up EEPROM */
siemens_ee_setup(void)17 int 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
39 err:
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 */
siemens_ee_read_data(uint address,uchar * buffer,int len)45 int 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