Commit 3d904005 authored by Andrea.Ho's avatar Andrea.Ho Committed by Hans de Goede
Browse files

platform/x86: add support for Advantech software defined button 



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: default avatarAndrea.Ho <Andrea.Ho@advantech.com.tw>
Link: https://lore.kernel.org/r/20210319034427.23222-1-andrea.cs97g@nctu.edu.tw


Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent e72457fc

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -573,6 +573,12 @@ S: Maintained 
F:	Documentation/scsi/advansys.rst

F:	drivers/scsi/advansys.c









ADVANTECH SWBTN DRIVER









M:	Andrea Ho <Andrea.Ho@advantech.com.tw>









L:	platform-driver-x86@vger.kernel.org









S:	Maintained









F:	drivers/platform/x86/adv_swbutton.c

















ADXL34X THREE-AXIS DIGITAL ACCELEROMETER DRIVER (ADXL345/ADXL346)









M:	Michael Hennerich <michael.hennerich@analog.com>









S:	Supported
































drivers/platform/x86/Kconfig



+11
−0






























Original line number
Diff line number
Diff line







@@ -193,6 +193,17 @@ config AMD_PMC







	  If you choose to compile this driver as a module the module will be









	  called amd-pmc.



















config ADV_SWBUTTON









	tristate "Advantech ACPI Software Button Driver"









	depends on ACPI && INPUT









	help









	  Say Y here to enable support for Advantech software defined









	  button feature. More information can be found at









	  <http://www.advantech.com.tw/products/>



















	  To compile this driver as a module, choose M here. The module will









	  be called adv_swbutton.



















config APPLE_GMUX









	tristate "Apple Gmux Driver"









	depends on ACPI && PCI
































drivers/platform/x86/Makefile



+3
−0






























Original line number
Diff line number
Diff line







@@ -24,6 +24,9 @@ obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o







# AMD









obj-$(CONFIG_AMD_PMC)		+= amd-pmc.o



















# Advantech









obj-$(CONFIG_ADV_SWBUTTON)	+= adv_swbutton.o



















# Apple









obj-$(CONFIG_APPLE_GMUX)	+= apple-gmux.o










































drivers/platform/x86/adv_swbutton.c
0 → 100644



+121
−0






























Original line number
Diff line number
Diff line









// 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");