diff options
| -rw-r--r-- | drivers/misc/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/misc/i2c_eeprom.c | 39 | ||||
| -rw-r--r-- | include/i2c_eeprom.h | 4 |
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 |