[PATCH v1 1/2] iio: light: acpi-als: Register ACPI notify handler directly

["Rafael J. Wysocki" <rafael@kernel.org>]

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

To facilitate subsequent conversion of the driver to a platform one,
make it install an ACPI notify handler directly instead of using
a .notify() callback in struct acpi_driver.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/iio/light/acpi-als.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
index d5d1a8b9c035..2fe6b493c012 100644
--- a/drivers/iio/light/acpi-als.c
+++ b/drivers/iio/light/acpi-als.c
@@ -90,9 +90,9 @@ static int acpi_als_read_value(struct acpi_als *als, char *prop, s32 *val)
 	return 0;
 }
 
-static void acpi_als_notify(struct acpi_device *device, u32 event)
+static void acpi_als_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct iio_dev *indio_dev = acpi_driver_data(device);
+	struct iio_dev *indio_dev = data;
 	struct acpi_als *als = iio_priv(indio_dev);
 
 	if (iio_buffer_enabled(indio_dev) && iio_trigger_using_own(indio_dev)) {
@@ -102,7 +102,7 @@ static void acpi_als_notify(struct acpi_device *device, u32 event)
 			break;
 		default:
 			/* Unhandled event */
-			dev_dbg(&device->dev,
+			dev_dbg(&als->device->dev,
 				"Unhandled ACPI ALS event (%08x)!\n",
 				event);
 		}
@@ -218,7 +218,17 @@ static int acpi_als_add(struct acpi_device *device)
 	if (ret)
 		return ret;
 
-	return devm_iio_device_register(dev, indio_dev);
+	ret = devm_iio_device_register(dev, indio_dev);
+	if (ret)
+		return ret;
+
+	return acpi_dev_install_notify_handler(device, ACPI_DEVICE_NOTIFY,
+					       acpi_als_notify, indio_dev);
+}
+
+static void acpi_als_remove(struct acpi_device *device)
+{
+	acpi_dev_remove_notify_handler(device, ACPI_DEVICE_NOTIFY, acpi_als_notify);
 }
 
 static const struct acpi_device_id acpi_als_device_ids[] = {
@@ -234,7 +244,7 @@ static struct acpi_driver acpi_als_driver = {
 	.ids	= acpi_als_device_ids,
 	.ops = {
 		.add	= acpi_als_add,
-		.notify	= acpi_als_notify,
+		.remove	= acpi_als_remove,
 	},
 };
 
-- 
2.51.0