drivers/misc/i2c_eeprom.c

   1 /*
   2  * Copyright (c) 2014 Google, Inc
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <linux/err.h>
   9 #include <dm.h>
  10 #include <i2c.h>
  11 #include <i2c_eeprom.h>
  12
  13 static int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
  14                            int size)
  15 {
  16         return dm_i2c_read(dev, offset, buf, size);
  17 }
  18
  19 static int i2c_eeprom_write(struct udevice *dev, int offset,
  20                             const uint8_t *buf, int size)
  21 {
  22         return -ENODEV;
  23 }
  24
  25 struct i2c_eeprom_ops i2c_eeprom_std_ops = {
  26         .read   = i2c_eeprom_read,
  27         .write  = i2c_eeprom_write,
  28 };
  29
  30 static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
  31 {
  32         struct i2c_eeprom *priv = dev_get_priv(dev);
  33         u64 data = dev_get_driver_data(dev);
  34
  35         /* 6 bit -> page size of up to 2^63 (should be sufficient) */
  36         priv->pagewidth = data & 0x3F;
  37         priv->pagesize = (1 << priv->pagewidth);
  38
  39         return 0;
  40 }
  41
  42 int i2c_eeprom_std_probe(struct udevice *dev)
  43 {
  44         return 0;
  45 }
  46
  47 static const struct udevice_id i2c_eeprom_std_ids[] = {
  48         { .compatible = "i2c-eeprom", .data = 0 },
  49         { .compatible = "atmel,24c01a", .data = 3 },
  50         { .compatible = "atmel,24c02", .data = 3 },
  51         { .compatible = "atmel,24c04", .data = 4 },
  52         { .compatible = "atmel,24c08a", .data = 4 },
  53         { .compatible = "atmel,24c16a", .data = 4 },
  54         { .compatible = "atmel,24c32", .data = 5 },
  55         { .compatible = "atmel,24c64", .data = 5 },
  56         { .compatible = "atmel,24c128", .data = 6 },
  57         { .compatible = "atmel,24c256", .data = 6 },
  58         { .compatible = "atmel,24c512", .data = 6 },
  59         { }
  60 };
  61
  62 U_BOOT_DRIVER(i2c_eeprom_std) = {
  63         .name                   = "i2c_eeprom",
  64         .id                     = UCLASS_I2C_EEPROM,
  65         .of_match               = i2c_eeprom_std_ids,
  66         .probe                  = i2c_eeprom_std_probe,
  67         .ofdata_to_platdata     = i2c_eeprom_std_ofdata_to_platdata,
  68         .priv_auto_alloc_size   = sizeof(struct i2c_eeprom),
  69         .ops                    = &i2c_eeprom_std_ops,
  70 };
  71
  72 UCLASS_DRIVER(i2c_eeprom) = {
  73         .id             = UCLASS_I2C_EEPROM,
  74         .name           = "i2c_eeprom",
  75 };