iio: magnetometer: ak8975: Convert to use device_get_match_data()

Convert to use device_get_match_data() instead of open coded variant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 8e50e07..3c88154 100644 (file)
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -203,11 +203,11 @@ static long ak09912_raw_to_gauss(u16 data)
 
 /* Compatible Asahi Kasei Compass parts */
 enum asahi_compass_chipset {
+       AKXXXX          = 0,
        AK8975,
        AK8963,
        AK09911,
        AK09912,
-       AK_MAX_TYPE
 };
 
 enum ak_ctrl_reg_addr {
@@ -245,7 +245,7 @@ struct ak_def {
        u8 data_regs[3];
 };
 
-static const struct ak_def ak_def_array[AK_MAX_TYPE] = {
+static const struct ak_def ak_def_array[] = {
        {
                .type = AK8975,
                .raw_to_gauss = ak8975_raw_to_gauss,
@@ -781,19 +781,6 @@ static const struct acpi_device_id ak_acpi_match[] = {
 MODULE_DEVICE_TABLE(acpi, ak_acpi_match);
 #endif
 
-static const char *ak8975_match_acpi_device(struct device *dev,
-                                           enum asahi_compass_chipset *chipset)
-{
-       const struct acpi_device_id *id;
-
-       id = acpi_match_device(dev->driver->acpi_match_table, dev);
-       if (!id)
-               return NULL;
-       *chipset = (int)id->driver_data;
-
-       return dev_name(dev);
-}
-
 static void ak8975_fill_buffer(struct iio_dev *indio_dev)
 {
        struct ak8975_data *data = iio_priv(indio_dev);
@@ -852,9 +839,11 @@ static int ak8975_probe(struct i2c_client *client,
        struct ak8975_data *data;
        struct iio_dev *indio_dev;
        struct gpio_desc *eoc_gpiod;
+       const void *match;
+       unsigned int i;
        int err;
+       enum asahi_compass_chipset chipset;
        const char *name = NULL;
-       enum asahi_compass_chipset chipset = AK_MAX_TYPE;
 
        /*
         * Grab and set up the supplied GPIO.
@@ -884,23 +873,27 @@ static int ak8975_probe(struct i2c_client *client,
                return err;
 
        /* id will be NULL when enumerated via ACPI */
-       if (id) {
+       match = device_get_match_data(&client->dev);
+       if (match) {
+               chipset = (enum asahi_compass_chipset)(match);
+               name = dev_name(&client->dev);
+       } else if (id) {
                chipset = (enum asahi_compass_chipset)(id->driver_data);
                name = id->name;
-       } else if (ACPI_HANDLE(&client->dev)) {
-               name = ak8975_match_acpi_device(&client->dev, &chipset);
-               if (!name)
-                       return -ENODEV;
        } else
                return -ENOSYS;
 
-       if (chipset >= AK_MAX_TYPE) {
+       for (i = 0; i < ARRAY_SIZE(ak_def_array); i++)
+               if (ak_def_array[i].type == chipset)
+                       break;
+
+       if (i == ARRAY_SIZE(ak_def_array)) {
                dev_err(&client->dev, "AKM device type unsupported: %d\n",
                        chipset);
                return -ENODEV;
        }
 
-       data->def = &ak_def_array[chipset];
+       data->def = &ak_def_array[i];
 
        /* Fetch the regulators */
        data->vdd = devm_regulator_get(&client->dev, "vdd");