1 files changed, 70 insertions, 1 deletions

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index a466e40acb2c..e0b4b36ef010 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
@@ -176,6 +177,64 @@ static const struct i2c_device_id at24_ids[] = {
 };
 MODULE_DEVICE_TABLE(i2c, at24_ids);
 
+static const struct of_device_id at24_of_match[] = {
+        {
+                .compatible = "atmel,24c00",
+                .data = (void *)AT24_DEVICE_MAGIC(128 / 8, AT24_FLAG_TAKE8ADDR)
+        },
+        {
+                .compatible = "atmel,24c01",
+                .data = (void *)AT24_DEVICE_MAGIC(1024 / 8, 0)
+        },
+        {
+                .compatible = "atmel,24c02",
+                .data = (void *)AT24_DEVICE_MAGIC(2048 / 8, 0)
+        },
+        {
+                .compatible = "atmel,spd",
+                .data = (void *)AT24_DEVICE_MAGIC(2048 / 8,
+                                AT24_FLAG_READONLY | AT24_FLAG_IRUGO)
+        },
+        {
+                .compatible = "atmel,24c04",
+                .data = (void *)AT24_DEVICE_MAGIC(4096 / 8, 0)
+        },
+        {
+                .compatible = "atmel,24c08",
+                .data = (void *)AT24_DEVICE_MAGIC(8192 / 8, 0)
+        },
+        {
+                .compatible = "atmel,24c16",
+                .data = (void *)AT24_DEVICE_MAGIC(16384 / 8, 0)
+        },
+        {
+                .compatible = "atmel,24c32",
+                .data = (void *)AT24_DEVICE_MAGIC(32768 / 8, AT24_FLAG_ADDR16)
+        },
+        {
+                .compatible = "atmel,24c64",
+                .data = (void *)AT24_DEVICE_MAGIC(65536 / 8, AT24_FLAG_ADDR16)
+        },
+        {
+                .compatible = "atmel,24c128",
+                .data = (void *)AT24_DEVICE_MAGIC(131072 / 8, AT24_FLAG_ADDR16)
+        },
+        {
+                .compatible = "atmel,24c256",
+                .data = (void *)AT24_DEVICE_MAGIC(262144 / 8, AT24_FLAG_ADDR16)
+        },
+        {
+                .compatible = "atmel,24c512",
+                .data = (void *)AT24_DEVICE_MAGIC(524288 / 8, AT24_FLAG_ADDR16)
+        },
+        {
+                .compatible = "atmel,24c1024",
+                .data = (void *)AT24_DEVICE_MAGIC(1048576 / 8, AT24_FLAG_ADDR16)
+        },
+        { },
+};
+MODULE_DEVICE_TABLE(of, at24_of_match);
+
 static const struct acpi_device_id at24_acpi_ids[] = {
         { "INT3499", AT24_DEVICE_MAGIC(8192 / 8, 0) },
         { }
@@ -629,7 +688,16 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
         if (client->dev.platform_data) {
                 chip = *(struct at24_platform_data *)client->dev.platform_data;
         } else {
-                if (id) {
+                /*
+                 * The I2C core allows OF nodes compatibles to match against the
+                 * I2C device ID table as a fallback, so check not only if an OF
+                 * node is present but also if it matches an OF device ID entry.
+                 */
+                if (client->dev.of_node &&
+                    of_match_device(at24_of_match, &client->dev)) {
+                        magic = (kernel_ulong_t)
+                                of_device_get_match_data(&client->dev);
+                } else if (id) {
                         magic = id->driver_data;
                 } else {
                         const struct acpi_device_id *aid;
@@ -855,6 +923,7 @@ static int at24_remove(struct i2c_client *client)
 static struct i2c_driver at24_driver = {
         .driver = {
                 .name = "at24",
+                .of_match_table = at24_of_match,
                 .acpi_match_table = ACPI_PTR(at24_acpi_ids),
         },
         .probe = at24_probe,