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94 lines
2.2 KiB
94 lines
2.2 KiB
// 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 <[email protected]>"); |
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MODULE_AUTHOR("Nikita Yushchenko <[email protected]>"); |
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MODULE_AUTHOR("Andrey Smirnov <[email protected]>"); |
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MODULE_DESCRIPTION("RAVE SP Power Button driver");
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