1 files changed, 19 insertions, 14 deletions

diff --git a/drivers/gpio/pcf857x.c b/drivers/gpio/pcf857x.c
index 8856870dd738..aa6cc8b2a2bc 100644
--- a/drivers/gpio/pcf857x.c
+++ b/drivers/gpio/pcf857x.c
@@ -26,6 +26,21 @@
 #include <asm/gpio.h>
 
 
+static const struct i2c_device_id pcf857x_id[] = {
+        { "pcf8574", 8 },
+        { "pca8574", 8 },
+        { "pca9670", 8 },
+        { "pca9672", 8 },
+        { "pca9674", 8 },
+        { "pcf8575", 16 },
+        { "pca8575", 16 },
+        { "pca9671", 16 },
+        { "pca9673", 16 },
+        { "pca9675", 16 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, pcf857x_id);
+
 /*
  * The pcf857x, pca857x, and pca967x chips only expose one read and one
  * write register.  Writing a "one" bit (to match the reset state) lets
@@ -173,13 +188,8 @@ static int pcf857x_probe(struct i2c_client *client,
          *
          * NOTE: we don't distinguish here between *4 and *4a parts.
          */
-        if (strcmp(client->name, "pcf8574") == 0
-                        || strcmp(client->name, "pca8574") == 0
-                        || strcmp(client->name, "pca9670") == 0
-                        || strcmp(client->name, "pca9672") == 0
-                        || strcmp(client->name, "pca9674") == 0
-                        ) {
-                gpio->chip.ngpio = 8;
+        gpio->chip.ngpio = id->driver_data;
+        if (gpio->chip.ngpio == 8) {
                 gpio->chip.direction_input = pcf857x_input8;
                 gpio->chip.get = pcf857x_get8;
                 gpio->chip.direction_output = pcf857x_output8;
@@ -199,13 +209,7 @@ static int pcf857x_probe(struct i2c_client *client,
          *
          * NOTE: we don't distinguish here between '75 and '75c parts.
          */
-        } else if (strcmp(client->name, "pcf8575") == 0
-                        || strcmp(client->name, "pca8575") == 0
-                        || strcmp(client->name, "pca9671") == 0
-                        || strcmp(client->name, "pca9673") == 0
-                        || strcmp(client->name, "pca9675") == 0
-                        ) {
-                gpio->chip.ngpio = 16;
+        } else if (gpio->chip.ngpio == 16) {
                 gpio->chip.direction_input = pcf857x_input16;
                 gpio->chip.get = pcf857x_get16;
                 gpio->chip.direction_output = pcf857x_output16;
@@ -314,6 +318,7 @@ static struct i2c_driver pcf857x_driver = {
         },
         .probe  = pcf857x_probe,
         .remove = pcf857x_remove,
+        .id_table = pcf857x_id,
 };
 
 static int __init pcf857x_init(void)