62f0f079b9
Add driver that properly handles input event emitted by RAVE SP devices. Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// Power Button driver for RAVE SP
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//
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// Copyright (C) 2017 Zodiac Inflight Innovations
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//
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//
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#include <linux/input.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mfd/rave-sp.h>
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#include <linux/platform_device.h>
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#define RAVE_SP_EVNT_BUTTON_PRESS (RAVE_SP_EVNT_BASE + 0x00)
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struct rave_sp_power_button {
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struct input_dev *idev;
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struct notifier_block nb;
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};
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static int rave_sp_power_button_event(struct notifier_block *nb,
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unsigned long action, void *data)
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{
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struct rave_sp_power_button *pb =
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container_of(nb, struct rave_sp_power_button, nb);
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const u8 event = rave_sp_action_unpack_event(action);
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const u8 value = rave_sp_action_unpack_value(action);
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struct input_dev *idev = pb->idev;
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if (event == RAVE_SP_EVNT_BUTTON_PRESS) {
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input_report_key(idev, KEY_POWER, value);
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input_sync(idev);
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return NOTIFY_STOP;
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}
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return NOTIFY_DONE;
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}
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static int rave_sp_pwrbutton_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct rave_sp_power_button *pb;
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struct input_dev *idev;
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int error;
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pb = devm_kzalloc(dev, sizeof(*pb), GFP_KERNEL);
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if (!pb)
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return -ENOMEM;
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idev = devm_input_allocate_device(dev);
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if (!idev)
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return -ENOMEM;
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idev->name = pdev->name;
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input_set_capability(idev, EV_KEY, KEY_POWER);
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error = input_register_device(idev);
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if (error)
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return error;
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pb->idev = idev;
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pb->nb.notifier_call = rave_sp_power_button_event;
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pb->nb.priority = 128;
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error = devm_rave_sp_register_event_notifier(dev, &pb->nb);
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if (error)
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return error;
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return 0;
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}
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static const struct of_device_id rave_sp_pwrbutton_of_match[] = {
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{ .compatible = "zii,rave-sp-pwrbutton" },
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{}
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};
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static struct platform_driver rave_sp_pwrbutton_driver = {
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.probe = rave_sp_pwrbutton_probe,
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.driver = {
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.name = KBUILD_MODNAME,
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.of_match_table = rave_sp_pwrbutton_of_match,
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},
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};
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module_platform_driver(rave_sp_pwrbutton_driver);
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MODULE_DEVICE_TABLE(of, rave_sp_pwrbutton_of_match);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Andrey Vostrikov <andrey.vostrikov@cogentembedded.com>");
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MODULE_AUTHOR("Nikita Yushchenko <nikita.yoush@cogentembedded.com>");
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MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
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MODULE_DESCRIPTION("RAVE SP Power Button driver");
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