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-rw-r--r--drivers/misc/Kconfig5
-rw-r--r--drivers/misc/i2c_eeprom.c39
-rw-r--r--include/i2c_eeprom.h4
3 files changed, 40 insertions, 8 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 2373037685..b84e351da7 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -144,4 +144,9 @@ config QFW
Hidden option to enable QEMU fw_cfg interface. This will be selected by
either CONFIG_CMD_QFW or CONFIG_GENERATE_ACPI_TABLE.
+config I2C_EEPROM
+ bool "Enable driver for generic I2C-attached EEPROMs"
+ depends on MISC
+ help
+ Enable a generic driver for EEPROMs attached via I2C.
endmenu
diff --git a/drivers/misc/i2c_eeprom.c b/drivers/misc/i2c_eeprom.c
index 814134a2cb..c9f4174bad 100644
--- a/drivers/misc/i2c_eeprom.c
+++ b/drivers/misc/i2c_eeprom.c
@@ -13,7 +13,7 @@
static int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
int size)
{
- return -ENODEV;
+ return dm_i2c_read(dev, offset, buf, size);
}
static int i2c_eeprom_write(struct udevice *dev, int offset,
@@ -27,23 +27,46 @@ struct i2c_eeprom_ops i2c_eeprom_std_ops = {
.write = i2c_eeprom_write,
};
+static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
+{
+ struct i2c_eeprom *priv = dev_get_priv(dev);
+ u64 data = dev_get_driver_data(dev);
+
+ /* 6 bit -> page size of up to 2^63 (should be sufficient) */
+ priv->pagewidth = data & 0x3F;
+ priv->pagesize = (1 << priv->pagewidth);
+
+ return 0;
+}
+
int i2c_eeprom_std_probe(struct udevice *dev)
{
return 0;
}
static const struct udevice_id i2c_eeprom_std_ids[] = {
- { .compatible = "i2c-eeprom" },
+ { .compatible = "i2c-eeprom", .data = 0 },
+ { .compatible = "atmel,24c01a", .data = 3 },
+ { .compatible = "atmel,24c02", .data = 3 },
+ { .compatible = "atmel,24c04", .data = 4 },
+ { .compatible = "atmel,24c08a", .data = 4 },
+ { .compatible = "atmel,24c16a", .data = 4 },
+ { .compatible = "atmel,24c32", .data = 5 },
+ { .compatible = "atmel,24c64", .data = 5 },
+ { .compatible = "atmel,24c128", .data = 6 },
+ { .compatible = "atmel,24c256", .data = 6 },
+ { .compatible = "atmel,24c512", .data = 6 },
{ }
};
U_BOOT_DRIVER(i2c_eeprom_std) = {
- .name = "i2c_eeprom",
- .id = UCLASS_I2C_EEPROM,
- .of_match = i2c_eeprom_std_ids,
- .probe = i2c_eeprom_std_probe,
- .priv_auto_alloc_size = sizeof(struct i2c_eeprom),
- .ops = &i2c_eeprom_std_ops,
+ .name = "i2c_eeprom",
+ .id = UCLASS_I2C_EEPROM,
+ .of_match = i2c_eeprom_std_ids,
+ .probe = i2c_eeprom_std_probe,
+ .ofdata_to_platdata = i2c_eeprom_std_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct i2c_eeprom),
+ .ops = &i2c_eeprom_std_ops,
};
UCLASS_DRIVER(i2c_eeprom) = {
diff --git a/include/i2c_eeprom.h b/include/i2c_eeprom.h
index ea6c962a39..0452892812 100644
--- a/include/i2c_eeprom.h
+++ b/include/i2c_eeprom.h
@@ -14,6 +14,10 @@ struct i2c_eeprom_ops {
};
struct i2c_eeprom {
+ /* The EEPROM's page size in byte */
+ unsigned long pagesize;
+ /* The EEPROM's page width in bits (pagesize = 2^pagewidth) */
+ unsigned pagewidth;
};
#endif