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// SPDX-License-Identifier: GPL-2.0+
//
// Power Button driver for RAVE SP
//
// Copyright (C) 2017 Zodiac Inflight Innovations
//
//
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/rave-sp.h>
#include <linux/platform_device.h>
#define RAVE_SP_EVNT_BUTTON_PRESS (RAVE_SP_EVNT_BASE + 0x00)
struct rave_sp_power_button {
struct input_dev *idev;
struct notifier_block nb;
};
static int rave_sp_power_button_event(struct notifier_block *nb,
unsigned long action, void *data)
{
struct rave_sp_power_button *pb =
container_of(nb, struct rave_sp_power_button, nb);
const u8 event = rave_sp_action_unpack_event(action);
const u8 value = rave_sp_action_unpack_value(action);
struct input_dev *idev = pb->idev;
if (event == RAVE_SP_EVNT_BUTTON_PRESS) {
input_report_key(idev, KEY_POWER, value);
input_sync(idev);
return NOTIFY_STOP;
}
return NOTIFY_DONE;
}
static int rave_sp_pwrbutton_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rave_sp_power_button *pb;
struct input_dev *idev;
int error;
pb = devm_kzalloc(dev, sizeof(*pb), GFP_KERNEL);
if (!pb)
return -ENOMEM;
idev = devm_input_allocate_device(dev);
if (!idev)
return -ENOMEM;
idev->name = pdev->name;
input_set_capability(idev, EV_KEY, KEY_POWER);
error = input_register_device(idev);
if (error)
return error;
pb->idev = idev;
pb->nb.notifier_call = rave_sp_power_button_event;
pb->nb.priority = 128;
error = devm_rave_sp_register_event_notifier(dev, &pb->nb);
if (error)
return error;
return 0;
}
static const struct of_device_id rave_sp_pwrbutton_of_match[] = {
{ .compatible = "zii,rave-sp-pwrbutton" },
{}
};
static struct platform_driver rave_sp_pwrbutton_driver = {
.probe = rave_sp_pwrbutton_probe,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = rave_sp_pwrbutton_of_match,
},
};
module_platform_driver(rave_sp_pwrbutton_driver);
MODULE_DEVICE_TABLE(of, rave_sp_pwrbutton_of_match);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andrey Vostrikov <andrey.vostrikov@cogentembedded.com>");
MODULE_AUTHOR("Nikita Yushchenko <nikita.yoush@cogentembedded.com>");
MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
MODULE_DESCRIPTION("RAVE SP Power Button driver");
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