@@ -115,16 +115,34 @@ static const struct i2c_device_id at24_ids[] = {
{ "24c00", AT24_DEVICE_MAGIC(128 / 8, AT24_FLAG_TAKE8ADDR) },
/* old variants can't be handled with this generic entry! */
{ "24c01", AT24_DEVICE_MAGIC(1024 / 8, 0) },
+ { "24cs01", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
{ "24c02", AT24_DEVICE_MAGIC(2048 / 8, 0) },
+ { "24cs02", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
/* spd is a 24c02 in memory DIMMs */
{ "spd", AT24_DEVICE_MAGIC(2048 / 8,
AT24_FLAG_READONLY | AT24_FLAG_IRUGO) },
{ "24c04", AT24_DEVICE_MAGIC(4096 / 8, 0) },
+ { "24cs04", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
/* 24rf08 quirk is handled at i2c-core */
{ "24c08", AT24_DEVICE_MAGIC(8192 / 8, 0) },
+ { "24cs08", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
{ "24c16", AT24_DEVICE_MAGIC(16384 / 8, 0) },
+ { "24cs16", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_SERIAL | AT24_FLAG_READONLY) },
{ "24c32", AT24_DEVICE_MAGIC(32768 / 8, AT24_FLAG_ADDR16) },
+ { "24cs32", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_ADDR16 |
+ AT24_FLAG_SERIAL |
+ AT24_FLAG_READONLY) },
{ "24c64", AT24_DEVICE_MAGIC(65536 / 8, AT24_FLAG_ADDR16) },
+ { "24cs64", AT24_DEVICE_MAGIC(128 / 8,
+ AT24_FLAG_ADDR16 |
+ AT24_FLAG_SERIAL |
+ AT24_FLAG_READONLY) },
{ "24c128", AT24_DEVICE_MAGIC(131072 / 8, AT24_FLAG_ADDR16) },
{ "24c256", AT24_DEVICE_MAGIC(262144 / 8, AT24_FLAG_ADDR16) },
{ "24c512", AT24_DEVICE_MAGIC(524288 / 8, AT24_FLAG_ADDR16) },
The infrastructure for reading of the factory-programmed serial number for at24cs EEPROM series is now in place. Add the chips that are actually equipped with the serial number memory area to the list of supported devices. The chips from the at24cs family have two memory areas - a regular read-write block and a read-only area containing the serial number. The latter is visible on a different slave address (the address of the wr memory block + 0x08). In order to access both blocks the user needs to instantiate a regular at24c device for the wr block address and a corresponding at24cs device on the serial number block address. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> --- drivers/misc/eeprom/at24.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html