[PATCH v4 25/35] platform/x86/topstar-laptop: Move handler installing logic to driver

[Michal Wilczynski <michal.wilczynski@xxxxxxxxx>]

Currently logic for installing notifications from ACPI devices is
implemented using notify callback in struct acpi_driver. Preparations
are being made to replace acpi_driver with more generic struct
platform_driver, which doesn't contain notify callback. Furthermore
as of now handlers are being called indirectly through
acpi_notify_device(), which decreases performance.

Call acpi_device_install_event_handler() at the end of .add() callback.
Call acpi_device_remove_event_handler() at the beginning of .remove()
callback. Change arguments passed to the notify callback to match with
what's required by acpi_device_install_event_handler().

Signed-off-by: Michal Wilczynski <michal.wilczynski@xxxxxxxxx>
---
 drivers/platform/x86/topstar-laptop.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/topstar-laptop.c b/drivers/platform/x86/topstar-laptop.c
index 20df1ebefc30..cfe2a92ef1f5 100644
--- a/drivers/platform/x86/topstar-laptop.c
+++ b/drivers/platform/x86/topstar-laptop.c
@@ -232,12 +232,15 @@ static int topstar_acpi_fncx_switch(struct acpi_device *device, bool state)
 	return 0;
 }
 
-static void topstar_acpi_notify(struct acpi_device *device, u32 event)
+static void topstar_acpi_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct topstar_laptop *topstar = acpi_driver_data(device);
+	struct acpi_device *device = data;
+	struct topstar_laptop *topstar;
 	static bool dup_evnt[2];
 	bool *dup;
 
+	topstar = acpi_driver_data(device);
+
 	/* 0x83 and 0x84 key events comes duplicated... */
 	if (event == 0x83 || event == 0x84) {
 		dup = &dup_evnt[event - 0x83];
@@ -319,6 +322,10 @@ static int topstar_acpi_add(struct acpi_device *device)
 			goto err_input_exit;
 	}
 
+	err = acpi_device_install_event_handler(device, ACPI_DEVICE_NOTIFY, topstar_acpi_notify);
+	if (err)
+		goto err_input_exit;
+
 	return 0;
 
 err_input_exit:
@@ -336,6 +343,8 @@ static void topstar_acpi_remove(struct acpi_device *device)
 {
 	struct topstar_laptop *topstar = acpi_driver_data(device);
 
+	acpi_device_remove_event_handler(device, ACPI_DEVICE_NOTIFY, topstar_acpi_notify);
+
 	if (led_workaround)
 		topstar_led_exit(topstar);
 
@@ -360,7 +369,6 @@ static struct acpi_driver topstar_acpi_driver = {
 	.ops = {
 		.add = topstar_acpi_add,
 		.remove = topstar_acpi_remove,
-		.notify = topstar_acpi_notify,
 	},
 };
 
-- 
2.40.1