leds: pca955x: Add ACPI support

This patch enables ACPI support for leds-pca955x driver.

Signed-off-by: Tin Huynh <tnhuynh@apm.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>

1 files changed, 22 insertions, 2 deletions

diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index 840401ae9a4e..78a7ce816a47 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -40,6 +40,7 @@
  *  bits the chip supports.
  */
 
+#include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/string.h>
@@ -100,6 +101,15 @@ static const struct i2c_device_id pca955x_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, pca955x_id);
 
+static const struct acpi_device_id pca955x_acpi_ids[] = {
+        { "PCA9550",  pca9550 },
+        { "PCA9551",  pca9551 },
+        { "PCA9552",  pca9552 },
+        { "PCA9553",  pca9553 },
+        { }
+};
+MODULE_DEVICE_TABLE(acpi, pca955x_acpi_ids);
+
 struct pca955x {
         struct mutex lock;
         struct pca955x_led *leds;
@@ -250,7 +260,16 @@ static int pca955x_probe(struct i2c_client *client,
         struct led_platform_data *pdata;
         int i, err;
 
-        chip = &pca955x_chipdefs[id->driver_data];
+        if (id) {
+                chip = &pca955x_chipdefs[id->driver_data];
+        } else {
+                const struct acpi_device_id *acpi_id;
+
+                acpi_id = acpi_match_device(pca955x_acpi_ids, &client->dev);
+                if (!acpi_id)
+                        return -ENODEV;
+                chip = &pca955x_chipdefs[acpi_id->driver_data];
+        }
         adapter = to_i2c_adapter(client->dev.parent);
         pdata = dev_get_platdata(&client->dev);
 
@@ -264,7 +283,7 @@ static int pca955x_probe(struct i2c_client *client,
 
         dev_info(&client->dev, "leds-pca955x: Using %s %d-bit LED driver at "
                         "slave address 0x%02x\n",
-                        id->name, chip->bits, client->addr);
+                        client->name, chip->bits, client->addr);
 
         if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
                 return -EIO;
@@ -358,6 +377,7 @@ static int pca955x_remove(struct i2c_client *client)
 static struct i2c_driver pca955x_driver = {
         .driver = {
                 .name   = "leds-pca955x",
+                .acpi_match_table = ACPI_PTR(pca955x_acpi_ids),
         },
         .probe  = pca955x_probe,
         .remove = pca955x_remove,