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platform/x86: Add Acer Wireless Radio Control driver 

New Acer laptops in 2018 will have a separate ACPI device for
notifications from the airplane mode hotkey. The device name in
the DSDT is SMKB and its ACPI _HID is 10251229.

For these models, when the airplane mode hotkey (Fn+F3) pressed,
a query 0x02 is started in the Embedded Controller, and all this
query does is a notify SMKB with the value 0x80.

        Scope (_SB.PCI0.LPCB.EC0)
        {
                (...)
                Method (_Q02, 0, NotSerialized)  // _Qxx: EC Query
                {
                    HKEV (0x2, One)
		    Notify (SMKB, 0x80)	// Status Change
                }
        }

Based on code from asus-wireless

Signed-off-by: Chris Chiu <chiu@endlessm.com>
Reviewed-by: João Paulo Rechi Vita <jprvita@endlessm.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Chris Chiu 2017-11-21 13:30:44 +08:00 committed by Andy Shevchenko
parent db2582afa7
commit 75971febd9
3 changed files with 86 additions and 0 deletions
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14
drivers/platform/x86/Kconfig
View File

@ -36,6 +36,20 @@ config ACER_WMI
If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
here.
config ACER_WIRELESS
tristate "Acer Wireless Radio Control Driver"
depends on ACPI
depends on INPUT
---help---
The Acer Wireless Radio Control handles the airplane mode hotkey
present on new Acer laptops.
Say Y or M here if you have an Acer notebook with an airplane mode
hotkey.
If you choose to compile this driver as a module the module will be
called acer-wireless.
config ACERHDF
tristate "Acer Aspire One temperature and fan driver"
depends on ACPI && THERMAL

1
drivers/platform/x86/Makefile
View File

@ -23,6 +23,7 @@ obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o
obj-$(CONFIG_DELL_SMO8800) += dell-smo8800.o
obj-$(CONFIG_DELL_RBTN) += dell-rbtn.o
obj-$(CONFIG_ACER_WMI) += acer-wmi.o
obj-$(CONFIG_ACER_WIRELESS) += acer-wireless.o
obj-$(CONFIG_ACERHDF) += acerhdf.o
obj-$(CONFIG_HP_ACCEL) += hp_accel.o
obj-$(CONFIG_HP_WIRELESS) += hp-wireless.o

71
drivers/platform/x86/acer-wireless.c Normal file
View File

@ -0,0 +1,71 @@
/*
* Acer Wireless Radio Control Driver
*
* Copyright (C) 2017 Endless Mobile, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/acpi.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci_ids.h>
#include <linux/types.h>
static const struct acpi_device_id acer_wireless_acpi_ids[] = {
{"10251229", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, acer_wireless_acpi_ids);
static void acer_wireless_notify(struct acpi_device *adev, u32 event)
{
struct input_dev *idev = acpi_driver_data(adev);
dev_dbg(&adev->dev, "event=%#x\n", event);
if (event != 0x80) {
dev_notice(&adev->dev, "Unknown SMKB event: %#x\n", event);
return;
}
input_report_key(idev, KEY_RFKILL, 1);
input_report_key(idev, KEY_RFKILL, 0);
input_sync(idev);
}
static int acer_wireless_add(struct acpi_device *adev)
{
struct input_dev *idev;
idev = devm_input_allocate_device(&adev->dev);
if (!idev)
return -ENOMEM;
adev->driver_data = idev;
idev->name = "Acer Wireless Radio Control";
idev->phys = "acer-wireless/input0";
idev->id.bustype = BUS_HOST;
idev->id.vendor = PCI_VENDOR_ID_AI;
idev->id.product = 0x1229;
set_bit(EV_KEY, idev->evbit);
set_bit(KEY_RFKILL, idev->keybit);
return input_register_device(idev);
}
static struct acpi_driver acer_wireless_driver = {
.name = "Acer Wireless Radio Control Driver",
.class = "hotkey",
.ids = acer_wireless_acpi_ids,
.ops = {
.add = acer_wireless_add,
.notify = acer_wireless_notify,
},
};
module_acpi_driver(acer_wireless_driver);
MODULE_DESCRIPTION("Acer Wireless Radio Control Driver");
MODULE_AUTHOR("Chris Chiu <chiu@gmail.com>");
MODULE_LICENSE("GPL v2");