The M24M01-D* eeproms are in effect 2 eeproms under 2 I2C addresses:
1. a standard 1Mbit eeprom (driver model 24c1024 is working)
2. a 256 Byte write lockable "ID page".
As the ID page demands 2 byte addresses, the 24c02 driver model
can not be used.
So a new model 24cm02 is introduced.
In the device tree, refer to the ID page of the eeprom as
compatible = "st,m24m01-d", "atmel,24cm02";
Signed-off-by: Johannes Poehlmann <Johannes.Poehlmann@xxxxxxxxxxx>
---
Documentation/devicetree/bindings/eeprom/at24.txt | 1 +
drivers/misc/eeprom/at24.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/Documentation/devicetree/bindings/eeprom/at24.txt b/Documentation/devicetree/bindings/eeprom/at24.txt
index 1812c84..c62c960 100644
--- a/Documentation/devicetree/bindings/eeprom/at24.txt
+++ b/Documentation/devicetree/bindings/eeprom/at24.txt
@@ -10,6 +10,7 @@ Required properties:
"atmel,24cs01",
"atmel,24c02",
"atmel,24cs02",
+ "atmel,24cm02",
"atmel,24mac402",
"atmel,24mac602",
"atmel,spd",
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 01f9c49..5afeb1a 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -146,6 +146,7 @@ AT24_CHIP_DATA(at24_data_24c01, 1024 / 8, 0);
AT24_CHIP_DATA(at24_data_24cs01, 16,
AT24_FLAG_SERIAL | AT24_FLAG_READONLY);
AT24_CHIP_DATA(at24_data_24c02, 2048 / 8, 0);
+AT24_CHIP_DATA(at24_data_24cm02, 2048 / 8, AT24_FLAG_ADDR16);
AT24_CHIP_DATA(at24_data_24cs02, 16,
AT24_FLAG_SERIAL | AT24_FLAG_READONLY);
AT24_CHIP_DATA(at24_data_24mac402, 48 / 8,
@@ -184,6 +185,7 @@ static const struct i2c_device_id at24_ids[] = {
{ "24cs01", (kernel_ulong_t)&at24_data_24cs01 },
{ "24c02", (kernel_ulong_t)&at24_data_24c02 },
{ "24cs02", (kernel_ulong_t)&at24_data_24cs02 },
+ { "24cm02", (kernel_ulong_t)&at24_data_24cm02 },
{ "24mac402", (kernel_ulong_t)&at24_data_24mac402 },
{ "24mac602", (kernel_ulong_t)&at24_data_24mac602 },
{ "spd", (kernel_ulong_t)&at24_data_spd },
@@ -212,6 +214,7 @@ static const struct of_device_id at24_of_match[] = {
{ .compatible = "atmel,24cs01", .data = &at24_data_24cs01 },
{ .compatible = "atmel,24c02", .data = &at24_data_24c02 },
{ .compatible = "atmel,24cs02", .data = &at24_data_24cs02 },
+ { .compatible = "atmel,24cm02", .data = &at24_data_24cm02 },
{ .compatible = "atmel,24mac402", .data = &at24_data_24mac402 },
{ .compatible = "atmel,24mac602", .data = &at24_data_24mac602 },
{ .compatible = "atmel,spd", .data = &at24_data_spd },
--
2.1.4
