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eeepc-wmi: use a platform device as parent device of all sub-devices 

Add a platform device and use it as the parent device of all sub-devices.

Signed-off-by: Yong Wang <yong.y.wang@intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Reviewed-by: Corentin Chary <corentincj@iksaif.net>
This commit is contained in:
Yong Wang 2010-04-11 09:27:19 +08:00 committed by Matthew Garrett
parent 8124888940
commit 45f2c6937e
1 changed files with 87 additions and 17 deletions
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104
drivers/platform/x86/eeepc-wmi.c
View File

@ -32,9 +32,12 @@
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/platform_device.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#define EEEPC_WMI_FILE "eeepc-wmi"
MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
MODULE_LICENSE("GPL");
@ -64,7 +67,7 @@ struct eeepc_wmi {
struct input_dev *inputdev;
};
static struct eeepc_wmi *eeepc;
static struct platform_device *platform_device;
static void eeepc_wmi_notify(u32 value, void *context)
{
@ -107,8 +110,9 @@ static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc)
return -ENOMEM;
eeepc->inputdev->name = "Eee PC WMI hotkeys";
eeepc->inputdev->phys = "wmi/input0";
eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0";
eeepc->inputdev->id.bustype = BUS_HOST;
eeepc->inputdev->dev.parent = &platform_device->dev;
err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL);
if (err)
@ -137,11 +141,60 @@ static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc)
eeepc->inputdev = NULL;
}
static int __init eeepc_wmi_init(void)
static int __devinit eeepc_wmi_platform_probe(struct platform_device *device)
{
struct eeepc_wmi *eeepc;
int err;
acpi_status status;
eeepc = platform_get_drvdata(device);
err = eeepc_wmi_input_init(eeepc);
if (err)
return err;
status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
eeepc_wmi_notify, eeepc);
if (ACPI_FAILURE(status)) {
pr_err("Unable to register notify handler - %d\n",
status);
err = -ENODEV;
goto error_wmi;
}
return 0;
error_wmi:
eeepc_wmi_input_exit(eeepc);
return err;
}
static int __devexit eeepc_wmi_platform_remove(struct platform_device *device)
{
struct eeepc_wmi *eeepc;
eeepc = platform_get_drvdata(device);
wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
eeepc_wmi_input_exit(eeepc);
return 0;
}
static struct platform_driver platform_driver = {
.driver = {
.name = EEEPC_WMI_FILE,
.owner = THIS_MODULE,
},
.probe = eeepc_wmi_platform_probe,
.remove = __devexit_p(eeepc_wmi_platform_remove),
};
static int __init eeepc_wmi_init(void)
{
struct eeepc_wmi *eeepc;
int err;
if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
pr_warning("No known WMI GUID found\n");
return -ENODEV;
@ -151,29 +204,46 @@ static int __init eeepc_wmi_init(void)
if (!eeepc)
return -ENOMEM;
err = eeepc_wmi_input_init(eeepc);
if (err) {
kfree(eeepc);
return err;
platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1);
if (!platform_device) {
pr_warning("Unable to allocate platform device\n");
err = -ENOMEM;
goto fail_platform;
}
status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
eeepc_wmi_notify, eeepc);
if (ACPI_FAILURE(status)) {
pr_err("Unable to register notify handler - %d\n",
status);
eeepc_wmi_input_exit(eeepc);
kfree(eeepc);
return -ENODEV;
err = platform_device_add(platform_device);
if (err) {
pr_warning("Unable to add platform device\n");
goto put_dev;
}
platform_set_drvdata(platform_device, eeepc);
err = platform_driver_register(&platform_driver);
if (err) {
pr_warning("Unable to register platform driver\n");
goto del_dev;
}
return 0;
del_dev:
platform_device_del(platform_device);
put_dev:
platform_device_put(platform_device);
fail_platform:
kfree(eeepc);
return err;
}
static void __exit eeepc_wmi_exit(void)
{
wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
eeepc_wmi_input_exit(eeepc);
struct eeepc_wmi *eeepc;
eeepc = platform_get_drvdata(platform_device);
platform_driver_unregister(&platform_driver);
platform_device_unregister(platform_device);
kfree(eeepc);
}