mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
907cc9fefe
Using module_acpi_driver() to simplify the code. Signed-off-by: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
#include <linux/module.h>
|
|
#include <linux/sched/signal.h>
|
|
#include <linux/acpi.h>
|
|
#include <acpi/button.h>
|
|
|
|
MODULE_AUTHOR("Josh Triplett");
|
|
MODULE_DESCRIPTION("ACPI Tiny Power Button Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int power_signal __read_mostly = CONFIG_ACPI_TINY_POWER_BUTTON_SIGNAL;
|
|
module_param(power_signal, int, 0644);
|
|
MODULE_PARM_DESC(power_signal, "Power button sends this signal to init");
|
|
|
|
static const struct acpi_device_id tiny_power_button_device_ids[] = {
|
|
{ ACPI_BUTTON_HID_POWER, 0 },
|
|
{ ACPI_BUTTON_HID_POWERF, 0 },
|
|
{ "", 0 },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, tiny_power_button_device_ids);
|
|
|
|
static int acpi_noop_add_remove(struct acpi_device *device)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_tiny_power_button_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
kill_cad_pid(power_signal, 1);
|
|
}
|
|
|
|
static struct acpi_driver acpi_tiny_power_button_driver = {
|
|
.name = "tiny-power-button",
|
|
.class = "tiny-power-button",
|
|
.ids = tiny_power_button_device_ids,
|
|
.ops = {
|
|
.add = acpi_noop_add_remove,
|
|
.remove = acpi_noop_add_remove,
|
|
.notify = acpi_tiny_power_button_notify,
|
|
},
|
|
};
|
|
|
|
module_acpi_driver(acpi_tiny_power_button_driver);
|