iio: ak8975: Added ACPI enumeration
Added capability so that this device can be enumerated via ACPI. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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@ -31,6 +31,7 @@
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#include <linux/bitops.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/acpi.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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@ -475,6 +476,27 @@ static const struct iio_info ak8975_info = {
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.driver_module = THIS_MODULE,
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};
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static const struct acpi_device_id ak_acpi_match[] = {
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{"AK8975", AK8975},
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{"AK8963", AK8963},
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{"INVN6500", AK8963},
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, ak_acpi_match);
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static char *ak8975_match_acpi_device(struct device *dev,
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enum asahi_compass_chipset *chipset)
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{
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const struct acpi_device_id *id;
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id = acpi_match_device(dev->driver->acpi_match_table, dev);
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if (!id)
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return NULL;
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*chipset = (int)id->driver_data;
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return (char *)dev_name(dev);
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}
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static int ak8975_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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@ -482,6 +504,7 @@ static int ak8975_probe(struct i2c_client *client,
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struct iio_dev *indio_dev;
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int eoc_gpio;
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int err;
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char *name = NULL;
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/* Grab and set up the supplied GPIO. */
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if (client->dev.platform_data)
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@ -519,8 +542,18 @@ static int ak8975_probe(struct i2c_client *client,
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data->eoc_gpio = eoc_gpio;
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data->eoc_irq = 0;
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data->chipset = (enum asahi_compass_chipset)(id->driver_data);
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dev_dbg(&client->dev, "Asahi compass chip %s\n", id->name);
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/* id will be NULL when enumerated via ACPI */
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if (id) {
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data->chipset =
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(enum asahi_compass_chipset)(id->driver_data);
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name = (char *) id->name;
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} else if (ACPI_HANDLE(&client->dev))
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name = ak8975_match_acpi_device(&client->dev, &data->chipset);
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else {
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err = -ENOSYS;
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goto exit_free_iio;
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}
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dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
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/* Perform some basic start-of-day setup of the device. */
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err = ak8975_setup(client);
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@ -538,7 +571,7 @@ static int ak8975_probe(struct i2c_client *client,
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indio_dev->info = &ak8975_info;
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indio_dev->name = id->name;
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indio_dev->modes = INDIO_DIRECT_MODE;
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indio_dev->name = name;
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err = iio_device_register(indio_dev);
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if (err < 0)
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goto exit_free_iio;
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@ -593,6 +626,7 @@ static struct i2c_driver ak8975_driver = {
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.driver = {
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.name = "ak8975",
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.of_match_table = ak8975_of_match,
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.acpi_match_table = ACPI_PTR(ak_acpi_match),
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},
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.probe = ak8975_probe,
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.remove = ak8975_remove,
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