mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Andrea.Ho](/assets/img/avatar_default.png)
Advantech sw_button is a ACPI event trigger button. With this driver, we can report KEY_PROG1 on the Advantech Tabletop Network Appliances products and it has been tested in FWA1112VC. Add the software define button support to report EV_REP key_event (KEY_PROG1) by pressing button that could be get on user interface and trigger the customized actions. Signed-off-by: Andrea.Ho <Andrea.Ho@advantech.com.tw> Link: https://lore.kernel.org/r/20210319034427.23222-1-andrea.cs97g@nctu.edu.tw Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
121 lines
3 KiB
C
121 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* adv_swbutton.c - Software Button Interface Driver.
|
|
*
|
|
* (C) Copyright 2020 Advantech Corporation, Inc
|
|
*
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/input.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#define ACPI_BUTTON_HID_SWBTN "AHC0310"
|
|
|
|
#define ACPI_BUTTON_NOTIFY_SWBTN_RELEASE 0x86
|
|
#define ACPI_BUTTON_NOTIFY_SWBTN_PRESSED 0x85
|
|
|
|
struct adv_swbutton {
|
|
struct input_dev *input;
|
|
char phys[32];
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------
|
|
* Driver Interface
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
static void adv_swbutton_notify(acpi_handle handle, u32 event, void *context)
|
|
{
|
|
struct platform_device *device = context;
|
|
struct adv_swbutton *button = dev_get_drvdata(&device->dev);
|
|
|
|
switch (event) {
|
|
case ACPI_BUTTON_NOTIFY_SWBTN_RELEASE:
|
|
input_report_key(button->input, KEY_PROG1, 0);
|
|
input_sync(button->input);
|
|
break;
|
|
case ACPI_BUTTON_NOTIFY_SWBTN_PRESSED:
|
|
input_report_key(button->input, KEY_PROG1, 1);
|
|
input_sync(button->input);
|
|
break;
|
|
default:
|
|
dev_dbg(&device->dev, "Unsupported event [0x%x]\n", event);
|
|
}
|
|
}
|
|
|
|
static int adv_swbutton_probe(struct platform_device *device)
|
|
{
|
|
struct adv_swbutton *button;
|
|
struct input_dev *input;
|
|
acpi_handle handle = ACPI_HANDLE(&device->dev);
|
|
acpi_status status;
|
|
int error;
|
|
|
|
button = devm_kzalloc(&device->dev, sizeof(*button), GFP_KERNEL);
|
|
if (!button)
|
|
return -ENOMEM;
|
|
|
|
dev_set_drvdata(&device->dev, button);
|
|
|
|
input = devm_input_allocate_device(&device->dev);
|
|
if (!input)
|
|
return -ENOMEM;
|
|
|
|
button->input = input;
|
|
snprintf(button->phys, sizeof(button->phys), "%s/button/input0", ACPI_BUTTON_HID_SWBTN);
|
|
|
|
input->name = "Advantech Software Button";
|
|
input->phys = button->phys;
|
|
input->id.bustype = BUS_HOST;
|
|
input->dev.parent = &device->dev;
|
|
set_bit(EV_REP, input->evbit);
|
|
input_set_capability(input, EV_KEY, KEY_PROG1);
|
|
|
|
error = input_register_device(input);
|
|
if (error)
|
|
return error;
|
|
|
|
device_init_wakeup(&device->dev, true);
|
|
|
|
status = acpi_install_notify_handler(handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
adv_swbutton_notify,
|
|
device);
|
|
if (ACPI_FAILURE(status)) {
|
|
dev_err(&device->dev, "Error installing notify handler\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adv_swbutton_remove(struct platform_device *device)
|
|
{
|
|
acpi_handle handle = ACPI_HANDLE(&device->dev);
|
|
|
|
acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY,
|
|
adv_swbutton_notify);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct acpi_device_id button_device_ids[] = {
|
|
{ACPI_BUTTON_HID_SWBTN, 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, button_device_ids);
|
|
|
|
static struct platform_driver adv_swbutton_driver = {
|
|
.driver = {
|
|
.name = "adv_swbutton",
|
|
.acpi_match_table = button_device_ids,
|
|
},
|
|
.probe = adv_swbutton_probe,
|
|
.remove = adv_swbutton_remove,
|
|
};
|
|
module_platform_driver(adv_swbutton_driver);
|
|
|
|
MODULE_AUTHOR("Andrea Ho");
|
|
MODULE_DESCRIPTION("Advantech ACPI SW Button Driver");
|
|
MODULE_LICENSE("GPL v2");
|