2 * Copyright (c) 2014 Google, Inc
4 * SPDX-License-Identifier: GPL-2.0+
12 static int cur_busnum;
14 static int i2c_compat_get_device(uint chip_addr, int alen,
15 struct udevice **devp)
17 struct dm_i2c_chip *chip;
20 ret = i2c_get_chip_for_busnum(cur_busnum, chip_addr, alen, devp);
23 chip = dev_get_parent_platdata(*devp);
24 if (chip->offset_len != alen) {
25 printf("I2C chip %x: requested alen %d does not match chip offset_len %d\n",
26 chip_addr, alen, chip->offset_len);
27 return -EADDRNOTAVAIL;
33 int i2c_probe(uint8_t chip_addr)
35 struct udevice *bus, *dev;
38 ret = uclass_get_device_by_seq(UCLASS_I2C, cur_busnum, &bus);
40 debug("Cannot find I2C bus %d: err=%d\n", cur_busnum, ret);
47 return dm_i2c_probe(bus, chip_addr, 0, &dev);
50 int i2c_read(uint8_t chip_addr, unsigned int addr, int alen, uint8_t *buffer,
56 ret = i2c_compat_get_device(chip_addr, alen, &dev);
60 return dm_i2c_read(dev, addr, buffer, len);
63 int i2c_write(uint8_t chip_addr, unsigned int addr, int alen, uint8_t *buffer,
69 ret = i2c_compat_get_device(chip_addr, alen, &dev);
73 return dm_i2c_write(dev, addr, buffer, len);
76 int i2c_get_bus_num_fdt(int node)
81 ret = uclass_get_device_by_of_offset(UCLASS_I2C, node, &bus);
88 unsigned int i2c_get_bus_num(void)
93 int i2c_set_bus_num(unsigned int bus)
100 void i2c_init(int speed, int slaveaddr)
102 /* Nothing to do here - the init happens through driver model */
105 void board_i2c_init(const void *blob)
107 /* Nothing to do here - the init happens through driver model */
110 uint8_t i2c_reg_read(uint8_t chip_addr, uint8_t offset)
115 ret = i2c_compat_get_device(chip_addr, 1, &dev);
118 return dm_i2c_reg_read(dev, offset);
121 void i2c_reg_write(uint8_t chip_addr, uint8_t offset, uint8_t val)
126 ret = i2c_compat_get_device(chip_addr, 1, &dev);
128 dm_i2c_reg_write(dev, offset, val);