From: Andy Lutomirski <l...@kernel.org>
We already have the PNP glue to instantiate platform devices for the
ACPI devices that WMI drives. WMI should therefore attach to the
platform device, not the ACPI node.
Signed-off-by: Andy Lutomirski <l...@kernel.org>
Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Mario Limonciello <mario_limoncie...@dell.com>
Cc: Pali Rohár <pali.ro...@gmail.com>
Cc: Rafael Wysocki <r...@rjwysocki.net>
Cc: linux-kernel@vger.kernel.org
Cc: platform-driver-...@vger.kernel.org
Cc: linux-a...@vger.kernel.org
Signed-off-by: Darren Hart (VMware) <dvh...@infradead.org>
---
drivers/platform/x86/wmi.c | 57 +++++++++++++++++++++++++++-------------------
1 file changed, 33 insertions(+), 24 deletions(-)
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 483e4a6..f1c9464 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -37,6 +37,7 @@
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/wmi.h>
#include <linux/uuid.h>
@@ -91,8 +92,8 @@ module_param(debug_dump_wdg, bool, 0444);
MODULE_PARM_DESC(debug_dump_wdg,
"Dump available WMI interfaces [0/1]");
-static int acpi_wmi_remove(struct acpi_device *device);
-static int acpi_wmi_add(struct acpi_device *device);
+static int acpi_wmi_remove(struct platform_device *device);
+static int acpi_wmi_probe(struct platform_device *device);
static const struct acpi_device_id wmi_device_ids[] = {
{"PNP0C14", 0},
@@ -101,14 +102,13 @@ static const struct acpi_device_id wmi_device_ids[] = {
};
MODULE_DEVICE_TABLE(acpi, wmi_device_ids);
-static struct acpi_driver acpi_wmi_driver = {
- .name = "acpi-wmi",
- .owner = THIS_MODULE,
- .ids = wmi_device_ids,
- .ops = {
- .add = acpi_wmi_add,
- .remove = acpi_wmi_remove,
+static struct platform_driver acpi_wmi_driver = {
+ .driver = {
+ .name = "acpi-wmi",
+ .acpi_match_table = wmi_device_ids,
},
+ .probe = acpi_wmi_probe,
+ .remove = acpi_wmi_remove,
};
/*
@@ -1113,26 +1113,34 @@ static void acpi_wmi_notify_handler(acpi_handle handle,
u32 event,
}
-static int acpi_wmi_remove(struct acpi_device *device)
+static int acpi_wmi_remove(struct platform_device *device)
{
- acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+ struct acpi_device *acpi_device = ACPI_COMPANION(&device->dev);
+
+ acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY,
acpi_wmi_notify_handler);
- acpi_remove_address_space_handler(device->handle,
+ acpi_remove_address_space_handler(acpi_device->handle,
ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler);
- wmi_free_devices(device);
- device_unregister((struct device *)acpi_driver_data(device));
- device->driver_data = NULL;
+ wmi_free_devices(acpi_device);
+ device_unregister((struct device *)dev_get_drvdata(&device->dev));
return 0;
}
-static int acpi_wmi_add(struct acpi_device *device)
+static int acpi_wmi_probe(struct platform_device *device)
{
+ struct acpi_device *acpi_device;
struct device *wmi_bus_dev;
acpi_status status;
int error;
- status = acpi_install_address_space_handler(device->handle,
+ acpi_device = ACPI_COMPANION(&device->dev);
+ if (!acpi_device) {
+ dev_err(&device->dev, "ACPI companion is missing\n");
+ return -ENODEV;
+ }
+
+ status = acpi_install_address_space_handler(acpi_device->handle,
ACPI_ADR_SPACE_EC,
&acpi_wmi_ec_space_handler,
NULL, NULL);
@@ -1141,7 +1149,8 @@ static int acpi_wmi_add(struct acpi_device *device)
return -ENODEV;
}
- status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+ status = acpi_install_notify_handler(acpi_device->handle,
+ ACPI_DEVICE_NOTIFY,
acpi_wmi_notify_handler,
NULL);
if (ACPI_FAILURE(status)) {
@@ -1156,9 +1165,9 @@ static int acpi_wmi_add(struct acpi_device *device)
error = PTR_ERR(wmi_bus_dev);
goto err_remove_notify_handler;
}
- device->driver_data = wmi_bus_dev;
+ dev_set_drvdata(&device->dev, wmi_bus_dev);
- error = parse_wdg(wmi_bus_dev, device);
+ error = parse_wdg(wmi_bus_dev, acpi_device);
if (error) {
pr_err("Failed to parse WDG method\n");
goto err_remove_busdev;
@@ -1170,11 +1179,11 @@ static int acpi_wmi_add(struct acpi_device *device)
device_unregister(wmi_bus_dev);
err_remove_notify_handler:
- acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+ acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY,
acpi_wmi_notify_handler);
err_remove_ec_handler:
- acpi_remove_address_space_handler(device->handle,
+ acpi_remove_address_space_handler(acpi_device->handle,
ACPI_ADR_SPACE_EC,
&acpi_wmi_ec_space_handler);
@@ -1212,7 +1221,7 @@ static int __init acpi_wmi_init(void)
if (error)
goto err_unreg_class;
- error = acpi_bus_register_driver(&acpi_wmi_driver);
+ error = platform_driver_register(&acpi_wmi_driver);
if (error) {
pr_err("Error loading mapper\n");
goto err_unreg_bus;
@@ -1231,7 +1240,7 @@ static int __init acpi_wmi_init(void)
static void __exit acpi_wmi_exit(void)
{
- acpi_bus_unregister_driver(&acpi_wmi_driver);
+ platform_driver_unregister(&acpi_wmi_driver);
class_unregister(&wmi_bus_class);
bus_unregister(&wmi_bus_type);
}
--
2.9.4
